大家帮我翻译这篇文章好吗，翻译成英语，因为我英语烂，谢谢了
kuaidi.ping-jia.net 作者：佚名 更新日期：2024-07-08
大家帮我翻译一篇文章啊！英语译成汉语！要准确的，一定要快！因为今天七点之前就用了，谢谢了！有奖励。
1 Introduction
With the national economic development and improvement of living standards, people growing demand for electricity, while power supply reliability and quality of a higher power supply requirements. Feeder Automation is the reliability of power supply distribution network systems to improve the most direct and effective means of technology. Countries has increased in recent years on the city network and the transformation of rural power network, power supply bureaus of the major domestic investment in distribution automation is also increasing. Achieved in the distribution network automation process, we found that communication problems is a difficult problem. In this, just from the optical fiber communication in the distribution network automation application on little knowledge and experience.
2 Distribution Automation requirements for communication
SCADA system with the same dispatch, distribution automation system also needs an effective communication network, and he has his own characteristics: the number of terminals very much. System has a large distribution network by opening and closing, power distribution transformers, circuit breakers column to monitor these devices requires a number of FTU and TTU, while the FTU with the power distribution equipment installation, wide geographical distribution, communication nodes scattered.
Distribution automation system size, complexity and automation level of the decision of the communication system should meet the following requirements:
(1) Reliability:
Communications equipment distribution network systems have many exposed outdoors, bad environment, so must be able to withstand heat, cold, sun, rain, snow, hail and lightning and other natural attacks. Meanwhile, try to avoid all kinds of electromagnetic interference, to ensure long-term stable and reliable work, and asked when the line power failure, communication system can still work properly.
(2) economy:
Taking into account the overall economic power distribution system, communication system, investment should not be too large, and strive to make full use of the existing main network communication resources, for the Lord, the overall distribution network planning, avoid duplication of investment.
(3) addressing large:
Communication system not only to consider the present and future data needs, but also consider the upgrade requirements.
(4) two-way communication:
Distribution network automation to achieve the telemetry, remote, remote control, you must request a two-way communication capabilities.
(5) easy operation and maintenance.
According to the above requirements, along with fiber prices down, at present, optical fiber communication systems are widely used in electric power.
3 Optical Fiber Communication
Since the inception of laser and low loss optical fiber, optical fiber communication system with its technical and economic advantages of the rapid rise of unparalleled, and swept the globe. The system is based on optical fiber as the transmission medium to light as the carrier signal to transmit information in communication systems, applications of light wavelength of 1.0 ~ 1.μm Jing, the entire system from the electrical side machine, Optical, cable and repeaters pose. Fiber can be divided into single-mode fiber (SMF), multimode fiber (MMF), long-wavelength low drive bulk fiber (LMF), polarization maintaining fiber (PMF) and plastic optical fiber (POF) and so are many; commonly used for single-mode and multi-mode fiber, multimode fiber is more than light transmission mode, and single-mode fiber transmission of a light wave mode only. Single-mode fiber multimode fiber transmission distance than the length, the current general, the optical signal in the multi-mode optical fiber to be available for about 6km, the single-mode fiber transmission within 30km. Therefore, the price of single-mode optical devices than multi-mode optical devices. Practical optical fibers are usually more to strengthen the core, protecting materials, fixed materials combined to form the transmission line cable.
Optical fiber communication with the communication capacity, low attenuation, not afraid of lightning, anti-electromagnetic interference, corrosion resistance, confidentiality, reliability, and easy installation, but the relatively high investment costs, especially for inner city buried cable lines fiber laying, construction costs will be greater.
6 Conclusion
In the actual distribution automation communication system, must build a low cost, high effective two-way communication system, with acceptable reliability and cost of information flows in a very high performance. Also, because of distribution automation system functions to be accomplished by too many complex systems, a single communication system to meet the needs of all of the functions is unrealistic, and it is not economical. Therefore, power distribution automation system, to apply a variety of communication methods, according to a comprehensive economic and technical indicators and selecting the best combination of them. In the power system more commonly used multiple means of communication also point digital microwave radio data transmission, wireless spread spectrum, green cables, posts and telecommunications local network, carrier, spread spectrum carrier such as, for the selection network.
The application of Optical fiber communication in power distribution automation system
1 Introduction
With the national economic development and improvement of living standards,Our demand for electricity is also growing day by day .And we have a even higher demand to the reliability of the power supply and the quality of that.Feeder Automation is one of the most direct and effective mean to improve the reliability of power supply distribution network system .The state has increased the transformation on the city network and rural power network in recent years .The investment in distribution automation of many major domestic power supply bureaus is also increasing.During the distribution network automation process, we found that communication is a problem which is difficult to conquer. In the flowing ,i just want to have a discuss on the application of the optical fiber communication in the distribution network automation .
2 ,The communication requirements of distribution automation
Just the same with SCADA system ,distribution automation system also needs an effective communication network which has its own characteristics:the number of terminals is that large.The power distribution System has a large number of Open-close substations,power distribution transformers and column circuit breakers and also a great number of FTU and TTU used to monitor these devices.
老哥,我翻了半天,累了改天接着翻啊.顺便你看看东西能用不啊,完了告我一声,好吗 ,细细看,可不是机翻得啊
Optical fiber communication in power distribution automation system on the application of papers
1 preface
Along with the development of national economy and the improvement of people's living standard, people on the power of the growing demand for power supply, the reliability and power supply quality put forward higher request. Network feeder automation system is to improve the power supply reliability, the most direct and efficient technology is one of the means. In recent years China has increased in the rural and urban network reform, many big domestic electricity distribution automation to increase investment. In the process of realizing automation distribution network, we found the communication problem is a difficult problem. In this, as in optical fiber communication network automation reuse understanding and experience.
2 in power distribution automation system of communication
With dispatch SCADA system, power distribution automation system also needs an effective communication, while he has its own characteristics: terminals very much. The system has numerous open and close, distribution transformer, the column of the equipment, monitor and TTU many FTU, at the same time, along with the power equipment installation and FTU regional wide distribution, communication node.
Network automation system, the scale and complexity and automation determines the communication system should meet the following requirements:
(1) reliability:
System of communication equipment, there are many exposed outdoor environments, and therefore must be able to resist high temperature, low temperature, sunlight and rain, snow, hail and natural environment of lightning. At the same time, avoid all sorts of electromagnetic interference, ensure the long-term and stable and reliable work, and in the power circuit requirements, communication system can work normally.
(2) economy:
Considering the overall economic benefit of power system, the communication system of investment, should not be too much to make full use of the existing resources, the main provids communication network, overall planning, to avoid repeated investment.
(3) addressing quantity:
Communication system should not only consider the current and future needs of data transmission, consider system upgrade.
(4) two-way communication:
To realize the automation network remote measure, remote communication, remote control function, must have two-way communication ability.
(5) easy operation and maintenance.
According to the above requirements, accompanied by fiber prices, at present, optical fiber communication are widely used in power system.
3 optical communications
Since the laser and low loss fiber optic fiber communications system since the advent, with its technical and economic incomparable advantage and rising rapidly, and became popular in the world. This system is based on optical fiber transmission medium and light for carrier signal transfer information communication system, the application of wavelengths of light 1.0 ~ 1. 靘 m, the whole system speeds by electric transceiver, optical transceiver, optical and Repeaters. Optical fiber can be divided into (SMF) single-mode optical fiber, multimode fiber (MMF), long wavelengths scattered fiber (low), the partial LMF (PMF) and plastic optical fiber (etc) is various; POF Commonly used for singlemode and multimode fiber, multimode fiber is more light transmission mode, and the single-mode optical fiber transmission of a light only mode. Single-mode optical fiber transmission than the long distance, generally, light signals in multimode fiber can pass on single-mode optical fiber 6km, can pass 30km. Therefore, the single-mode optical equipment price than multimode optical equipment. Practical fiber is usually by optical, strengthen the core, protect material, fixed materials into the transmission cable form.
Optical fiber communication with communication capacity, small, do not be afraid of lightning, attenuation anti-electromagnetism interference, corrosion resistance, good secrecy, high reliability, installation convenience etc, but investment cost is relative taller, especially within the city of directly buried installation of fiber optic cable type, the construction cost will be more big.
6
In the actual network communication system, automated must construct a low cost, high convergence of two-way communication system, with acceptable costs in reliability and information flow to provide extremely high performance. At the same time, because of distribution automation system to complete function too complex, the system USES a single communications system to meet the needs of all functions are unrealistic, is not economical. Therefore, in the distribution automation system, application of communication mode, according to the comprehensive technical and economic indexes and select the most optimal combination. In the power system of a common means of communication and a multi-address digital microwave, radio, digital wireless spread-spectrum, special cable, posts and telecommunications carrier, the carrier, the spread between local networks, network for selecting.
Optical fiber communication in power distribution automation applications on paper
1 Introduction
With the national economic development and improvement of living standards, people growing demand for electricity, while power supply reliability and quality of a higher power supply requirements. Feeder Automation is the reliability of power supply distribution network systems to improve the most direct and effective means of technology. Countries has increased in recent years on the city network and the transformation of rural power network, power supply bureaus of the major domestic investment in distribution automation is also increasing. Achieved in the distribution network automation process, we found that communication problems is a difficult problem. In this, just from the optical fiber communication in the distribution network automation application on little knowledge and experience.
2 Distribution Automation requirements for communication
SCADA system with the same dispatch, distribution automation system also needs an effective communication network, and he has his own characteristics: the number of terminals very much. System has a large distribution network by opening and closing, power distribution transformers, circuit breakers column to monitor these devices requires a number of FTU and TTU, while the FTU with the power distribution equipment installation, wide geographical distribution, communication nodes scattered.
Distribution automation system size, complexity and automation level of the decision of the communication system should meet the following requirements:
(1) Reliability:
Communications equipment distribution network systems have many exposed outdoors, bad environment, so must be able to withstand heat, cold, sun, rain, snow, hail and lightning and other natural attacks. Meanwhile, try to avoid all kinds of electromagnetic interference, to ensure long-term stable and reliable work, and asked when the line power failure, communication system can still work properly.
(2) economy:
Taking into account the overall economic power distribution system, communication system, investment should not be too large, and strive to make full use of the existing main network communication resources, for the Lord, the overall distribution network planning, avoid duplication of investment.
(3) addressing large:
Communication system not only to consider the present and future data needs, but also consider the upgrade requirements.
(4) two-way communication:
Distribution network automation to achieve the telemetry, remote, remote control, you must request a two-way communication capabilities.
(5) easy operation and maintenance.
According to the above requirements, along with fiber prices down, at present, optical fiber communication systems are widely used in electric power.
3 Optical Fiber Communication
Since the inception of laser and low loss optical fiber, optical fiber communication system with its technical and economic advantages of the rapid rise of unparalleled, and swept the globe. The system is based on optical fiber as the transmission medium to light as the carrier signal to transmit information in communication systems, applications of light wavelength of 1.0 ~ 1.μm Jing, the entire system from the electrical side machine, Optical, cable and repeaters pose. Fiber can be divided into single-mode fiber (SMF), multimode fiber (MMF), long-wavelength low drive bulk fiber (LMF), polarization maintaining fiber (PMF) and plastic optical fiber (POF) and so are many; commonly used for single-mode and multi-mode fiber, multimode fiber is more than light transmission mode, and single-mode fiber transmission of a light wave mode only. Single-mode fiber multimode fiber transmission distance than the length, the current general, the optical signal in the multi-mode optical fiber to be available for about 6km, the single-mode fiber transmission within 30km. Therefore, the price of single-mode optical devices than multi-mode optical devices. Practical optical fibers are usually more to strengthen the core, protecting materials, fixed materials combined to form the transmission line cable.
Optical fiber communication with the communication capacity, low attenuation, not afraid of lightning, anti-electromagnetic interference, corrosion resistance, confidentiality, reliability, and easy installation, but the relatively high investment costs, especially for inner city buried cable lines fiber laying, construction costs will be greater.
6 Conclusion
In the actual distribution automation communication system, must build a low cost, high effective two-way communication system, with acceptable reliability and cost of information flows in a very high performance. Also, because of distribution automation system functions to be accomplished by too many complex systems, a single communication system to meet the needs of all of the functions is unrealistic, and it is not economical. Therefore, power distribution automation system, to apply a variety of communication methods, according to a comprehensive economic and technical indicators and selecting the best combination of them. In the power system more commonly used multiple means of communication also point digital microwave radio data transmission, wireless spread spectrum, green cables, posts and telecommunications local network, carrier, spread spectrum carrier such as, for the selection network.
大家好:请帮我翻译一下这段文字好吗?译成英语
答：Along with the whole world economic integration development, accountant the criterion internationalization already became the reality which each country was unable to avoid. Along with our country market economy development and reform and open policy thorough, our country the criterion internatio...
大家帮我翻译这篇文章好吗,翻译成英语,因为我英语烂,谢谢了
答：while power supply reliability and quality of a higher power supply requirements. Feeder Automation is the reliability of power supply distribution network systems to improve the most direct and effective means of technology. Countries has increased in recent years on the city network...
大家帮我用英语翻译这篇文章好吗
答：Oh, I think I will be unbelievably strong. A child will grow up and I will not weep but learn to protect myself and be strong. The journey must be finished by myself even by crawling. Never complain but endure.Don't cry. We'll grow up. There will be a new beginning ...
高手帮忙翻译一下这篇文章好吗..
答：人工翻译 英汉对照版 My compliments of the season and best regards to all students, parents/guardians, grandparents, friends and supporters of Chinese School of CAACF !首先请允许我向CAACF汉语学院的学生、学生父母（监护人）及祖父母、所有CAACF的朋友和支持者们致以诚挚的问候，祝大家佳节愉...
请大家帮我把这篇文章翻译成英文好吗?
答：floret and insects, and also has many strange fossils. In their spare time, we went there in twos and threes, there are almost our students' paradise.And half time, I will graduate from my Alma mater. I will never forget my teachers and classmates, I love my school!
帮我把这篇文章翻译成英文的好吗?
答：Dear Baby, if you can live, we must remember that I love you.In the face of the great maternal love, that each of us are babies. This remark, I think everyone will never forget.When the rescue team found her, she was dead, was the house collapsed down the pressure ...
谁能帮我翻译下这篇文章?谢谢
答：总期待着更高更好的位置 So distracted with our jealousy 嫉妒总在前头指使 Forget it’s in our hands to stop the agony 却忘记了我们自己就可以使这一切停止 Will you ever be content on your side of the fence?你难道就不能真正满足于上帝给我们的恩赐?Maybe you’re the guy who needs ...
有没有人~~帮我把这篇文章翻译成英文~!
答：我校举行了80年校庆，今天就是它的第80个生日，是值得庆贺的日子。场面非常宏大，热闹。有许多的老校友来到了这里，整个大操场人山人海。校庆开始了，开头有许多的表演：唱歌，舞蹈，武术...表演都非常精彩。后来，校领导上台演讲，整个校庆进入白热化。11：00，校歌响起，随着大家嘹亮的歌声，校庆落幕。
能不能帮忙把这篇文章翻译成英文的?
答：Hello,ladies and gentlemen.It's my great honour to speech here.First,i want to tell you all.My topic is "a flash unforgetable".A few weeks ago,while i was walking in the awful street,which is full of rubbish and leaves all around,my mood is so down.So i tried my best...
帮我把这篇文章翻译成英语!谢谢,很简单!
答：Hello everyone, I'm glad to be here today and introduce myself. My name is xxx, from xxx. I was born in xxxx. There are 3 people in my family, father, mother and I. I want to say that English is my favorate subject. I'm not picky with food and I like vegetables....
吃过午饭你是否常觉得困困的？其实这很正常，吃饭后你的身体代谢会减缓。那怎么办呢？不要灌咖啡，睡个午觉就好！每天打个午觉对身体很好。首先午睡后你的工作效率会提高，记忆更敏锐，错误犯得也少。同时午睡后，学习也更加容易了。午睡能够刺激你的自信，使你变得积极起来，使你兴奋。
但是，要想打个好午觉还是有些条条框框要遵从。如果你睡得太久，可能就会进入深睡眠，醒来后可能会觉得状况更糟。你应该设个闹钟，这样子午睡时候才能彻底没有包袱放松去睡。你不必应为害怕睡过头，时不时去看钟。
以后午饭后感到困顿，再也不用感到紧张。把头枕好，闭上眼睛，打个盹吧。
纯手打，高水平，希望楼主喜欢：）
With the global figure of the rapid development of electronic technology, the continuous improvement of people's living standards. Everyone in the production life of the temperature of the growing demand for high-informed. The resulting temperature measurement, real-time display and control equipment has become increasingly we need the electronic device. The system design and the collection of temperature changes in temperature curve on the LCD display.
First, because single-bus digital temperature sensor with miniaturization, low-power, high performance, anti-disturbance capacity, and other advantages, this paper, the international community more advanced digital temperature sensor DS18B20 the features and temperature monitoring and control system design. Second, the system uses LCD12864E LCD module as a display system, through the LCD module on the wave of change that is more intuitive to temperature changes. Paper also introduced LCD12864E part of the internal structure, working principle and the micro-controller interface. Again, in order to make better use of microcontrollers, in the choice of microcontrollers, the circuit design are added. On the software side, papers in the digital temperature sensor and LCD module DS18B20 the work of timing and control orders are made of and description.
The article on the digital temperature sensor DS18B20 the way to serial communication link with the SCM, and in order to insurance purposes, by the way the storage supply. LCD modules based on the different functions of pins connected with the MCU. SCM from the temperature sensors read data into the LCD module.
1 Introduction
With the national economic development and improvement of living standards, people growing demand for electricity, while power supply reliability and quality of a higher power supply requirements. Feeder Automation is the reliability of power supply distribution network systems to improve the most direct and effective means of technology. Countries has increased in recent years on the city network and the transformation of rural power network, power supply bureaus of the major domestic investment in distribution automation is also increasing. Achieved in the distribution network automation process, we found that communication problems is a difficult problem. In this, just from the optical fiber communication in the distribution network automation application on little knowledge and experience.
2 Distribution Automation requirements for communication
SCADA system with the same dispatch, distribution automation system also needs an effective communication network, and he has his own characteristics: the number of terminals very much. System has a large distribution network by opening and closing, power distribution transformers, circuit breakers column to monitor these devices requires a number of FTU and TTU, while the FTU with the power distribution equipment installation, wide geographical distribution, communication nodes scattered.
Distribution automation system size, complexity and automation level of the decision of the communication system should meet the following requirements:
(1) Reliability:
Communications equipment distribution network systems have many exposed outdoors, bad environment, so must be able to withstand heat, cold, sun, rain, snow, hail and lightning and other natural attacks. Meanwhile, try to avoid all kinds of electromagnetic interference, to ensure long-term stable and reliable work, and asked when the line power failure, communication system can still work properly.
(2) economy:
Taking into account the overall economic power distribution system, communication system, investment should not be too large, and strive to make full use of the existing main network communication resources, for the Lord, the overall distribution network planning, avoid duplication of investment.
(3) addressing large:
Communication system not only to consider the present and future data needs, but also consider the upgrade requirements.
(4) two-way communication:
Distribution network automation to achieve the telemetry, remote, remote control, you must request a two-way communication capabilities.
(5) easy operation and maintenance.
According to the above requirements, along with fiber prices down, at present, optical fiber communication systems are widely used in electric power.
3 Optical Fiber Communication
Since the inception of laser and low loss optical fiber, optical fiber communication system with its technical and economic advantages of the rapid rise of unparalleled, and swept the globe. The system is based on optical fiber as the transmission medium to light as the carrier signal to transmit information in communication systems, applications of light wavelength of 1.0 ~ 1.μm Jing, the entire system from the electrical side machine, Optical, cable and repeaters pose. Fiber can be divided into single-mode fiber (SMF), multimode fiber (MMF), long-wavelength low drive bulk fiber (LMF), polarization maintaining fiber (PMF) and plastic optical fiber (POF) and so are many; commonly used for single-mode and multi-mode fiber, multimode fiber is more than light transmission mode, and single-mode fiber transmission of a light wave mode only. Single-mode fiber multimode fiber transmission distance than the length, the current general, the optical signal in the multi-mode optical fiber to be available for about 6km, the single-mode fiber transmission within 30km. Therefore, the price of single-mode optical devices than multi-mode optical devices. Practical optical fibers are usually more to strengthen the core, protecting materials, fixed materials combined to form the transmission line cable.
Optical fiber communication with the communication capacity, low attenuation, not afraid of lightning, anti-electromagnetic interference, corrosion resistance, confidentiality, reliability, and easy installation, but the relatively high investment costs, especially for inner city buried cable lines fiber laying, construction costs will be greater.
6 Conclusion
In the actual distribution automation communication system, must build a low cost, high effective two-way communication system, with acceptable reliability and cost of information flows in a very high performance. Also, because of distribution automation system functions to be accomplished by too many complex systems, a single communication system to meet the needs of all of the functions is unrealistic, and it is not economical. Therefore, power distribution automation system, to apply a variety of communication methods, according to a comprehensive economic and technical indicators and selecting the best combination of them. In the power system more commonly used multiple means of communication also point digital microwave radio data transmission, wireless spread spectrum, green cables, posts and telecommunications local network, carrier, spread spectrum carrier such as, for the selection network.
The application of Optical fiber communication in power distribution automation system
1 Introduction
With the national economic development and improvement of living standards,Our demand for electricity is also growing day by day .And we have a even higher demand to the reliability of the power supply and the quality of that.Feeder Automation is one of the most direct and effective mean to improve the reliability of power supply distribution network system .The state has increased the transformation on the city network and rural power network in recent years .The investment in distribution automation of many major domestic power supply bureaus is also increasing.During the distribution network automation process, we found that communication is a problem which is difficult to conquer. In the flowing ,i just want to have a discuss on the application of the optical fiber communication in the distribution network automation .
2 ,The communication requirements of distribution automation
Just the same with SCADA system ,distribution automation system also needs an effective communication network which has its own characteristics:the number of terminals is that large.The power distribution System has a large number of Open-close substations,power distribution transformers and column circuit breakers and also a great number of FTU and TTU used to monitor these devices.
老哥,我翻了半天,累了改天接着翻啊.顺便你看看东西能用不啊,完了告我一声,好吗 ,细细看,可不是机翻得啊
Optical fiber communication in power distribution automation system on the application of papers
1 preface
Along with the development of national economy and the improvement of people's living standard, people on the power of the growing demand for power supply, the reliability and power supply quality put forward higher request. Network feeder automation system is to improve the power supply reliability, the most direct and efficient technology is one of the means. In recent years China has increased in the rural and urban network reform, many big domestic electricity distribution automation to increase investment. In the process of realizing automation distribution network, we found the communication problem is a difficult problem. In this, as in optical fiber communication network automation reuse understanding and experience.
2 in power distribution automation system of communication
With dispatch SCADA system, power distribution automation system also needs an effective communication, while he has its own characteristics: terminals very much. The system has numerous open and close, distribution transformer, the column of the equipment, monitor and TTU many FTU, at the same time, along with the power equipment installation and FTU regional wide distribution, communication node.
Network automation system, the scale and complexity and automation determines the communication system should meet the following requirements:
(1) reliability:
System of communication equipment, there are many exposed outdoor environments, and therefore must be able to resist high temperature, low temperature, sunlight and rain, snow, hail and natural environment of lightning. At the same time, avoid all sorts of electromagnetic interference, ensure the long-term and stable and reliable work, and in the power circuit requirements, communication system can work normally.
(2) economy:
Considering the overall economic benefit of power system, the communication system of investment, should not be too much to make full use of the existing resources, the main provids communication network, overall planning, to avoid repeated investment.
(3) addressing quantity:
Communication system should not only consider the current and future needs of data transmission, consider system upgrade.
(4) two-way communication:
To realize the automation network remote measure, remote communication, remote control function, must have two-way communication ability.
(5) easy operation and maintenance.
According to the above requirements, accompanied by fiber prices, at present, optical fiber communication are widely used in power system.
3 optical communications
Since the laser and low loss fiber optic fiber communications system since the advent, with its technical and economic incomparable advantage and rising rapidly, and became popular in the world. This system is based on optical fiber transmission medium and light for carrier signal transfer information communication system, the application of wavelengths of light 1.0 ~ 1. 靘 m, the whole system speeds by electric transceiver, optical transceiver, optical and Repeaters. Optical fiber can be divided into (SMF) single-mode optical fiber, multimode fiber (MMF), long wavelengths scattered fiber (low), the partial LMF (PMF) and plastic optical fiber (etc) is various; POF Commonly used for singlemode and multimode fiber, multimode fiber is more light transmission mode, and the single-mode optical fiber transmission of a light only mode. Single-mode optical fiber transmission than the long distance, generally, light signals in multimode fiber can pass on single-mode optical fiber 6km, can pass 30km. Therefore, the single-mode optical equipment price than multimode optical equipment. Practical fiber is usually by optical, strengthen the core, protect material, fixed materials into the transmission cable form.
Optical fiber communication with communication capacity, small, do not be afraid of lightning, attenuation anti-electromagnetism interference, corrosion resistance, good secrecy, high reliability, installation convenience etc, but investment cost is relative taller, especially within the city of directly buried installation of fiber optic cable type, the construction cost will be more big.
6
In the actual network communication system, automated must construct a low cost, high convergence of two-way communication system, with acceptable costs in reliability and information flow to provide extremely high performance. At the same time, because of distribution automation system to complete function too complex, the system USES a single communications system to meet the needs of all functions are unrealistic, is not economical. Therefore, in the distribution automation system, application of communication mode, according to the comprehensive technical and economic indexes and select the most optimal combination. In the power system of a common means of communication and a multi-address digital microwave, radio, digital wireless spread-spectrum, special cable, posts and telecommunications carrier, the carrier, the spread between local networks, network for selecting.
Optical fiber communication in power distribution automation applications on paper
1 Introduction
With the national economic development and improvement of living standards, people growing demand for electricity, while power supply reliability and quality of a higher power supply requirements. Feeder Automation is the reliability of power supply distribution network systems to improve the most direct and effective means of technology. Countries has increased in recent years on the city network and the transformation of rural power network, power supply bureaus of the major domestic investment in distribution automation is also increasing. Achieved in the distribution network automation process, we found that communication problems is a difficult problem. In this, just from the optical fiber communication in the distribution network automation application on little knowledge and experience.
2 Distribution Automation requirements for communication
SCADA system with the same dispatch, distribution automation system also needs an effective communication network, and he has his own characteristics: the number of terminals very much. System has a large distribution network by opening and closing, power distribution transformers, circuit breakers column to monitor these devices requires a number of FTU and TTU, while the FTU with the power distribution equipment installation, wide geographical distribution, communication nodes scattered.
Distribution automation system size, complexity and automation level of the decision of the communication system should meet the following requirements:
(1) Reliability:
Communications equipment distribution network systems have many exposed outdoors, bad environment, so must be able to withstand heat, cold, sun, rain, snow, hail and lightning and other natural attacks. Meanwhile, try to avoid all kinds of electromagnetic interference, to ensure long-term stable and reliable work, and asked when the line power failure, communication system can still work properly.
(2) economy:
Taking into account the overall economic power distribution system, communication system, investment should not be too large, and strive to make full use of the existing main network communication resources, for the Lord, the overall distribution network planning, avoid duplication of investment.
(3) addressing large:
Communication system not only to consider the present and future data needs, but also consider the upgrade requirements.
(4) two-way communication:
Distribution network automation to achieve the telemetry, remote, remote control, you must request a two-way communication capabilities.
(5) easy operation and maintenance.
According to the above requirements, along with fiber prices down, at present, optical fiber communication systems are widely used in electric power.
3 Optical Fiber Communication
Since the inception of laser and low loss optical fiber, optical fiber communication system with its technical and economic advantages of the rapid rise of unparalleled, and swept the globe. The system is based on optical fiber as the transmission medium to light as the carrier signal to transmit information in communication systems, applications of light wavelength of 1.0 ~ 1.μm Jing, the entire system from the electrical side machine, Optical, cable and repeaters pose. Fiber can be divided into single-mode fiber (SMF), multimode fiber (MMF), long-wavelength low drive bulk fiber (LMF), polarization maintaining fiber (PMF) and plastic optical fiber (POF) and so are many; commonly used for single-mode and multi-mode fiber, multimode fiber is more than light transmission mode, and single-mode fiber transmission of a light wave mode only. Single-mode fiber multimode fiber transmission distance than the length, the current general, the optical signal in the multi-mode optical fiber to be available for about 6km, the single-mode fiber transmission within 30km. Therefore, the price of single-mode optical devices than multi-mode optical devices. Practical optical fibers are usually more to strengthen the core, protecting materials, fixed materials combined to form the transmission line cable.
Optical fiber communication with the communication capacity, low attenuation, not afraid of lightning, anti-electromagnetic interference, corrosion resistance, confidentiality, reliability, and easy installation, but the relatively high investment costs, especially for inner city buried cable lines fiber laying, construction costs will be greater.
6 Conclusion
In the actual distribution automation communication system, must build a low cost, high effective two-way communication system, with acceptable reliability and cost of information flows in a very high performance. Also, because of distribution automation system functions to be accomplished by too many complex systems, a single communication system to meet the needs of all of the functions is unrealistic, and it is not economical. Therefore, power distribution automation system, to apply a variety of communication methods, according to a comprehensive economic and technical indicators and selecting the best combination of them. In the power system more commonly used multiple means of communication also point digital microwave radio data transmission, wireless spread spectrum, green cables, posts and telecommunications local network, carrier, spread spectrum carrier such as, for the selection network.
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