Design of generalized integrator phase locked loop for unbalanced grid

In order to detect the amplitude, phase and frequency of the grid voltage quickly and accurately, this paper analyzes the method of symmetrical components and principle of single synchronous reference frame phase locked loop. A design method of the generalized integrator phase locked loop is present...

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Bibliographic Details
Published inDianli Xitong Baohu yu Kongzhi Vol. 42; no. 11; pp. 148 - 154
Main Authors Hu, Ying-Zhan, Guo, Su-Na
Format Journal Article
LanguageChinese
Published 01.06.2014
Subjects
Amplitudes
Design engineering
Electric potential
Integrators
Matlab
Phase locked loops
Synchronous
Voltage
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Summary:In order to detect the amplitude, phase and frequency of the grid voltage quickly and accurately, this paper analyzes the method of symmetrical components and principle of single synchronous reference frame phase locked loop. A design method of the generalized integrator phase locked loop is presented, of which the positive and negative components are distinguished in alpha beta coordinate system, and the phase and frequency of positive sequence voltage are locked. And it takes use of Matlab/Simulink to carry on the research of single synchronous reference frame phase-locked loop and generalized integrator phase locked loop. Simulation results show that the generalized integrator phase locked loop can get amplitude, phase and frequency of the grid voltage accurately when the grid is unbalanced, and the frequency has good adaptiveness and has a certain inhibiting effect on low-order harmonic.
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ISSN:1674-3415