复杂电网工况下基于CDSOGI-SPLL的电网电压同步方法

LI Lin

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复杂电网工况下基于CDSOGI-SPLL的电网电压同步方法

更新时间：2025-08-13

- 复杂电网工况下基于CDSOGI-SPLL的电网电压同步方法
- Automation of Electric Power Systems Vol. 41, Issue 16, Pages: 151-157(2017)
- 作者机构：
  
  哈尔滨工业大学电气工程及自动化学院,黑龙江省,哈尔滨市,150001
- 作者简介：
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- Published：2017
- 稿件说明：
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LI Lin. [J]. Automation of electric power systems, 2017, 41(16): 151-157.
DOI：

LI Lin. [J]. Automation of electric power systems, 2017, 41(16): 151-157. DOI：

摘要

传统锁相环技术在三相电网电压含有直流分量、发生不对称故障以及严重畸变条件下

其检测精度受到直流分量、负序分量及谐波分量的干扰

将不能准确跟踪电网电压频率和相位。针对这一问题

提出一种将相序解耦谐振(SDR)控制器和改进的级联双二阶广义积分器软件锁相环(CDSOGI-SPLL)相结合的锁相方法。该方法首先利用SDR控制器将正负序分量进行分离

然后引入改进的级联双二阶广义积分器(CDSOGI)对正负序分量进行二次分离和谐波抑制

并消除直流分量对CDSOGI输出正交信号的影响。仿真和实验结果表明

在三相电网电压含有直流分量、不平衡和严重畸变情况下

所述方法可以实现电网电压同步信息的准确采集。

Abstract

The detection accuracy of the traditional phase-locked loop technology is disturbed by the direct current(DC)component

negative sequence component and harmonic component when the three-phase grid voltage contains DC component

asymmetrical voltage and serious distortion

which makes it cannot track the frequency and phase of power grid voltage accurately. In order to solve the problems

this paper proposes a synchronization method which combines the sequence-decoupled resonant(SDR)controller and cascaded double second order generalized integrator based software phase-locked loop(CDSOGI-SPLL). The SDR controller is used to separate positive and negative sequence components. The cascaded double second order generalized integrator(CDSOGI)is used to carry out secondary separation and harmonic suppression

and to eliminate the effect of DC component on orthogonal signal of CDSOGI. The simulation and experimental results show that the grid voltage synchronization information can be accurately collected when the three-phase grid voltage contains DC component

asymmetrical voltage and serious distortion. This work is supported by National Natural Science Foundation of China(No. 51377013

No. 51407023).

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