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《Automation of Electric Power Systems》 2003-15
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A NEW METHOD OF REAL TIME AND SYNCHRONOUS MEASUREMENT ON POWER NETWORK PHASE PARAMETERS

Jiang Daozhuo 1, Sun Weihua 1, Chen Susu 2 (1.Zhejiang University, Hangzhou 310027, China) (2.Yuhuan Power Supply Bureau of Zhejiang Province, Yuhuan 317600, China)  
Real-time and synchronous measurement of power network phase parameters at different site is very important to system state estimation, stability control, fault identification and relay protection etc. A new measurement method based on global position system (GPS) and phase locked loop (PLL) technique is discussed. An equal phase interval sampling pulse sequence which formed by the hardware logic circuit is used to self-adaptively follow system frequency variance, and makes the different site synchronous sampling achievable. These sampling pulses start up A/D converter to complete the synchronous sampling of input analog signal automatically. It effectively solves the problem of how to measure different site power system phase parameters with high precision synchronously.
【CateGory Index】: TM764
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