Neutral Potential Compound Control Method in Three-phase Four-wire Three-level D-STATCOM

ZHAN Xiongkeng; YU Hongqi; WANG Qingbin; LI Gai; WU Haiming; LIANG Weizheng

doi:10.14044/j.1674-1757.pcrpc.2018.05.008

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Neutral Potential Compound Control Method in Three-phase Four-wire Three-level D-STATCOM

更新时间：2024-09-14

- Neutral Potential Compound Control Method in Three-phase Four-wire Three-level D-STATCOM
- POWER CAPACITOR & REACTIVE POWER COMPENSATION Vol. 39, Issue 5, Pages: 42-48(2018)
- 作者机构：
  
  广东电网公司云浮云城供电局
- 作者简介：
- 基金信息：
- DOI：10.14044/j.1674-1757.pcrpc.2018.05.008
  CLC： TM761.12
- Published：2018，
- 稿件说明：
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[1]詹雄铿,余泓圻,王庆斌,李钙,伍海明,梁伟政.三相四线制三电平D-STATCOM中点电位复合控制方法[J].电力电容器与无功补偿,2018,39(05):42-48.

ZHAN XIONGKENG, YU HONGQI, WANG QINGBIN, et al. Neutral Potential Compound Control Method in Three-phase Four-wire Three-level D-STATCOM. [J]. Power capacitor & reactive power compensation, 2018, 39(5): 42-48.
[1]詹雄铿,余泓圻,王庆斌,李钙,伍海明,梁伟政.三相四线制三电平D-STATCOM中点电位复合控制方法[J].电力电容器与无功补偿,2018,39(05):42-48. DOI： 10.14044/j.1674-1757.pcrpc.2018.05.008.

ZHAN XIONGKENG, YU HONGQI, WANG QINGBIN, et al. Neutral Potential Compound Control Method in Three-phase Four-wire Three-level D-STATCOM. [J]. Power capacitor & reactive power compensation, 2018, 39(5): 42-48. DOI： 10.14044/j.1674-1757.pcrpc.2018.05.008.

摘要

针对三相四线三桥臂三电平静止同步补偿器

对中点电位平衡控制问题进行研究。详细阐述了传统的三维空间矢量调制算法的原理及调制过程

建立了电容中点电位与相电流的关系

并依此对传统调制算法基础矢量选择环节进行修正;对控制环节进行改进

在基于Ip-Iq法的双环控制基础上增加了一个均压环;基于以上两种改进方式

对三电平静止同步补偿器提出了一种具有中点电位平衡控制能力的复合控制算法。在PSCAD/EMTDC环境下搭建仿真模型进行仿真验证

仿真结果表明所提算法能够有效抑制中点电位偏移

且动态调节能力较强。

Abstract

The issue of neutral potential balance and control for three-phase four-wire three-leg three-levelSTATCOM is studied. The principle and modulation process of traditional 3 D-SVPWM modulation algo-rithm is described in detail

and the relationship between the neutral potential and phase current is estab-lished. On this basis

the basic vector selection of the traditional modulation algorithm is corrected. The con-trol link is modified and grading ring is added on the basis of double-loop control based on Ip-Iqalgorithm.Based on above two modification modes

a kind of compound control algorithm with neutral potential balancecontrolcapabilityforthethree-levelSTATCOMisproposed.ThesimulationmodelunderPSCAD/EMTDC en-vironment is set up for simulation and verification. It is shown by the simulation result that the algorithmproposed can suppress effectively neutral potential shift and have stronger dynamic adjustment ability.

关键词

三相四线三电平静止同步补偿器复合控制中点电位平衡三维空间矢量调制

Keywords

three-phase four-wire three-level D-STATCOMcompound controlneutral-point voltage balancing3D-SVPWM

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