Control Strategy of Cascade Y-STATCOM Under Imbalanced Grid Conditions

HUANG Yanguang; XU Chongfu; MA Zhiyuan; XU Zhong; WANG Yifei

doi:10.14044/j.1674-1757.pcrpc.2019.01.024

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Control Strategy of Cascade Y-STATCOM Under Imbalanced Grid Conditions

更新时间：2024-09-14

- Control Strategy of Cascade Y-STATCOM Under Imbalanced Grid Conditions
- POWER CAPACITOR & REACTIVE POWER COMPENSATION Vol. 40, Issue 1, Pages: 135-141(2019)
- 作者机构：
  
  1. 广州供电局有限公司电力试验研究院
  2. 西安西电电气研究院有限责任公司
- 作者简介：
- 基金信息：
- DOI：10.14044/j.1674-1757.pcrpc.2019.01.024
  CLC： TM712
- Published：2019，
- 稿件说明：
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[1]黄炎光,许崇福,马智远,许中,王弋飞.电网不平衡情况下级联星接STATCOM的控制策略[J].电力电容器与无功补偿,2019,40(01):135-141.

HUANG YANGUANG, XU CHONGFU, MA ZHIYUAN, et al. Control Strategy of Cascade Y-STATCOM Under Imbalanced Grid Conditions. [J]. Power capacitor & reactive power compensation, 2019, 40(1): 135-141.
[1]黄炎光,许崇福,马智远,许中,王弋飞.电网不平衡情况下级联星接STATCOM的控制策略[J].电力电容器与无功补偿,2019,40(01):135-141. DOI： 10.14044/j.1674-1757.pcrpc.2019.01.024.

HUANG YANGUANG, XU CHONGFU, MA ZHIYUAN, et al. Control Strategy of Cascade Y-STATCOM Under Imbalanced Grid Conditions. [J]. Power capacitor & reactive power compensation, 2019, 40(1): 135-141. DOI： 10.14044/j.1674-1757.pcrpc.2019.01.024.

摘要

STATCOM能否承受电网不平衡的冲击

在电网不平衡时持续稳定运行并提供有效的动态无功支撑

是其性能好坏的直接体现。本文从抑制负序电流和有功功率平衡的角度出发

利用叠加原理

提出级联星接STATCOM的负序电压前馈和零序电压稳压的控制方法。通过在逆变端口电压中叠加负序分量来抑制负序电流

在逆变端口电压中叠加零序分量将正序无功电流与逆变端口电压负序分量作用产生的有功功率予以抵消

从而实现了三相直流电压的稳定。该方法可以应对电网故障时负序电压对装置的影响

避免了装置在电网故障时直流电压失稳

同时能够准确地补偿动态无功。本文所提策略最终经过Matlab/Simulink完整仿真测试及RTDS试验测试。

Abstract

Whether the STATCOM can withstand the impact of grid imbalance

perform stable operation and provide effective dynamic reactive power support in the case of grid imbalance is direct embodiment of its performance.In this paper

the control method of negative sequence voltage feed forward and zero sequence voltage stability of cascade STATCOM is proposed staring from the point of the balance of suppressing negative sequence current and active power and with the use of superposition principle.The negative sequence is suppressed by way superposing negative sequence component at the port voltage of inverter.Superposition of zero sequence component in the port voltage of inverter to offset the positive sequence reactive power current and the active power due to the negative sequence component of port voltage of the inverter

thus achieving stability of the three-phase DC voltage.The method can deal with the influence of the negative sequence voltage on the device in the grid fault

avoid DC voltage instability of the device in grid fault and

at the same time

can compensate accurately dynamic reactive power.The strategy proposed in this paper finally passed Matlab/Simulink simulation test and RTDS test.

关键词

STATCOM负序电压前馈直流稳压正序电流控制零序电压计算RTDS

Keywords

STATCOMnegative sequence voltage feedforwardDC stable voltagepositive sequence current controlzero voltage calculationRTDS

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