| 摘要: |
| 为准确快速检测出电网电压的幅值、相位和频率，在分析对称分量法及单同步坐标系锁相环基本原理的基础上，提出了广义积分器锁相环的设计方法。这种方法在αβ坐标系下对电网电压进行正、负分序，进而锁定正序电压的相位和频率。并且使用Matlab/Simulink环境分别对单同步坐标系锁相环和基于广义积分器锁相环进行仿真研究，仿真结果表明广义积分器锁相环在电网不平衡时能够准确提取电网信号的幅值、相位和频率，频率自适应性良好且对低次谐波有一定的抑制作用。 |
| 关键词: 变流器 电网系统 锁相环；对称分量法；广义积分器 |
| DOI：10.7667/j.issn.1674-3415.2014.11.024 |
| 投稿时间：2013-11-30修订日期：2014-01-21 |
| 基金项目: |
|
| Design of generalized integrator phase locked loop for unbalanced grid |
| HU Ying-zhan,GUO Su-na |
| (Department of Electrical Engineering, Henan Polytechnic Institute, Nanyang 473000, China) |
| Abstract: |
| 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 αβ 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. |
| Key words: converter power system phase locked loop (PLL) symmetrical component method generalized integrator |
