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《Automation of Electric Power Systems》 2003-10
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Yan Dengjun 1, Yuan Hong 1, Gao Weizhong 2, Wu Feng 1, Ju Ping 1 (1. Hohai University, Nanjing 210098, China) (2. He'nan Electric Power Dispatch & Communication Center, Zhengzhou 450052, China)  
In present, the communication delay is uncertain and the number of the phase measurement unit (PMU) is limited in the supervisory and control system for dynamic stability. In order to make full use of the accuracy and high speed of computer network in data transmission, a transfer system for PMU data is built based on a combination of Ethernet and ATM. In the system, the communication delay, which is produced by the CSMA/CD in Ethernet, is reduced by using the Ethernet switch combined with the ATM switch. The error rate is also reduced because the program of the communication is programmed with the Windows Socket and TCP/IP protocol. Based on the fibre optic telecommunication cable, a real time transmission channel for the whole network phasor information is constructed. In the engineering practice, the system can transmit data one time in one circle to realize the real time monitoring of the power network operation situation based on the PMU wide area measured data.
【Fund】: 河海大学科技创新基金资助 ( 2 0 0 1 41 0 74 3)
【CateGory Index】: TM764
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