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《Electrical Measurement & Instrumentation》 2007-08
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Comparison and study on real-time phase synchronization methods

HU Wei-bing1,2,LI Kai-cheng1 (1.Electric Power Security and High Efficiency Lab,Huazhong University of Science and Technology,Wuhan 430074,China;2.College of Electrical Information Engineering,Wuhan Institute of Technology,Wuhan 430073,China)  
The fundamental principles,achievements of theoretical study and application situation of several synchronization method such as zero-crossing points detection method,phase-locked loop(PLL),the weighted least-squares estimation method(WLSE) and the zero-crossing digital phase-locked loop(ZCPLL) is summarized in detail.Noises,harmonics,frequency variations and network unbalance are the main power quality disturbances that effect the precision of phase synchronization.The paper gave out the advantages and disadvantages of each synchronization method combined with above different disturbances.All these provided the convenience for user to choose the appropriate synchronization method for practical applications.Finally some problems which are worth in-depth exploring are put forward about real-time phase synchronization with the development of distributed generation(DG) and phasor measurement unit(PMU) technology.
【CateGory Index】: TM933.312
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