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WAN measurement for power system design and implementation of a synchronous clock

Author: ZhuangYuFei
Tutor: HuangZuo
School: University of Electronic Science and Technology
Course: Detection Technology and Automation
Keywords: Synchronous Clock GPS IEEE-1588 IRIG-B FPGA Power System
CLC: TM76
Type: Master's thesis
Year: 2011
Downloads: 94
Quote: 1
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Abstract


The power system is in the key period of power system reform in our country. The smart grid characterized by automation and intelligent will be development direction of our country’s power grid. Various kinds of advanced electric power equipment and new type of real-time monitoring and control system are the essential condition of smart grid construction. They demanded higher for a time base. The wide-area measurement system guarantees the safe and stable operation of power system, which is used to monitor and regulate multi-area power system. It requires synchronous clock to all intelligent devices for unified dispatch and control. Therefore, the study of synchronous clock who meet requirements of the precision and reliability for power system is very important.This paper firstly analyzes the main several clock synchronization technologies at present. Then, it focuses on IEEE - 1588 protocal, including protocal characteristics, system structure, synchronous algorithm, etc. IEEE - 1588 protocal has the features of high synchronous precision, low cost and easy implement. GPS is a wireless time service system with the broadest distribution range and highest precision. IRIG-B time code has the advantages of comprehensive data, high precision and without artificial presets. Therefore, facing the urgent demand of synchronized clock for wide-area measurement of power system, this article designed and implemented a synchronized clock based GPS and IEEE-1588 protocol. The synchronous clock provides IRIG-B time code, serial time messages, PPS second pulse, and has the characteristics of high synchronous precision, good reliability and widely applicability. This paper introduces in detail the design method and concrete realization process of synchronous clock, and gives clock synchronization scheme for wide-area measurement of power system.The clock synchronization is one which of key questions for wide-area measurement of power system. According to the specific requirements of the wide-area measurement, this paper develops an effective synchronous clock. It overcomes the shortcomings of traditional synchronous clock, such as accuracy insufficiency, a single synchronous way, no matching interface type, etc. Finally the synchronous clock was tested and applied to the Phase Measurement Unit (PMU) for actual measurement. And the results showed that the synchronous clock can meet the requirement of wide-area measurement in power system.

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CLC: > Industrial Technology > Electrotechnical > Transmission and distribution engineering, power network and power system > Power system automation
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