A High-voltage Cascade Negative-sequence Current Generator and Its Control Strategy

XU Zhong; XU Chongfu; WANG Jin; CUI Xiaofei; WANG Yifei

doi:10.14044/j.1674-1757.pcrpc.2019.02.007

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A High-voltage Cascade Negative-sequence Current Generator and Its Control Strategy

更新时间：2024-09-14

- A High-voltage Cascade Negative-sequence Current Generator and Its Control Strategy
- POWER CAPACITOR & REACTIVE POWER COMPENSATION Vol. 40, Issue 2, Pages: 34-39(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.2019.02.007
  CLC： TM761
- Published：2019，
- 稿件说明：
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[1]许中,许崇福,王劲,崔晓飞,王弋飞.一种高压链式负序电流发生装置及其控制策略[J].电力电容器与无功补偿,2019,40(02):34-39+51.

XU ZHONG, XU CHONGFU, WANG JIN, et al. A High-voltage Cascade Negative-sequence Current Generator and Its Control Strategy. [J]. Power capacitor & reactive power compensation, 2019, 40(2): 34-39.
[1]许中,许崇福,王劲,崔晓飞,王弋飞.一种高压链式负序电流发生装置及其控制策略[J].电力电容器与无功补偿,2019,40(02):34-39+51. DOI： 10.14044/j.1674-1757.pcrpc.2019.02.007.

XU ZHONG, XU CHONGFU, WANG JIN, et al. A High-voltage Cascade Negative-sequence Current Generator and Its Control Strategy. [J]. Power capacitor & reactive power compensation, 2019, 40(2): 34-39. DOI： 10.14044/j.1674-1757.pcrpc.2019.02.007.

摘要

由于不对称性负载的广泛存在

STATCOM的负序电流补偿能力得到越来越多的重视

但是目前还缺乏合适的高压负序电流测试装置对其性能进行准确测试。本文提出一种高压链式负序电流发生装置

并对负序电流输出下直流电压相间不均衡进行了分析

理论分析表明产生这一现象的原因是单相桥臂中负序电流与正序电压形成的有功功率

在此基础上本文提出根据相间压差通过PI控制获得零序电压从而实现负序电流输出的控制策略。最后

本文通过搭建的20 kvar链式负序电流发生装置试验平台对控制策略进行验证

试验结果证明了控制策略的有效性。

Abstract

More and more attention is paid to the negative sequence current compensation ability of SATCOM due to wide existence of asymmetry load. However

there is at present a lack of a suitable high-voltage negative-sequence current generator for its performance test. In this paper

a kind of high-voltage cascade negative-sequence current generator is proposed and the dc-voltage unbalance between different phases under negative-sequence current output is analyzed. It is shown by the theoretical analysis the reason for this phenomenon is due to active power formed by the negative-sequence current and positive-sequence voltage in the single phase bridge arm and

on this basis

zero-sequence voltage is obtained by PI control in accordance with voltage difference between phases is proposed so to achieve the control strategy of negativesequence current output. Finally

the control strategy is verified by the set 20 kvar cascade negative sequence current generator test platform and the effectiveness of the control strategy is verified by the test result.

关键词

负序电流零序电压相间电压不平衡闭环控制

Keywords

negative-sequence currentzero-sequence voltagevoltage unbalance between phasesclosed-loop control

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Related Author

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Related Institution

School of Electric and Control Engineering,Xi’an University of Science and Technology

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