背靠背电压源型变流器控制策略及其对电能质量问题的隔离能力研究*

doi:10.11985/2020.03.016

电气工程学报 ›› 2020, Vol. 15 ›› Issue (3): 120-127.doi: 10.11985/2020.03.016

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背靠背电压源型变流器控制策略及其对电能质量问题的隔离能力研究^*

金庆忍(),郭敏(),姚知洋

广西电网有限责任公司电力科学研究院南宁 530023

收稿日期:2020-01-04 修回日期:2020-06-08 出版日期:2020-09-25 发布日期:2020-10-28
通讯作者: 金庆忍 E-mail:372925975@qq.com;guo_m.sy@gx.csg.cn
作者简介:郭敏,男,1984年生,硕士,高级工程师。主要研究方向为电能质量分析与控制。E-mail：guo_m.sy@gx.csg.cn
基金资助:
* 广西电网公司科技(GXKJXM20180964)

Research on Control Strategy of Back-to-back VSC and Its Isolation Ability to Power Quality Problems

JIN Qingren(),GUO Min(),YAO Zhiyang

Electric Power Research Institute of Guangxi Power Grid Co., Ltd., Nanning 530023

Received:2020-01-04 Revised:2020-06-08 Online:2020-09-25 Published:2020-10-28
Contact: JIN Qingren E-mail:372925975@qq.com;guo_m.sy@gx.csg.cn

摘要/Abstract

摘要：

随着电力电子设备在配电网中的应用,其对传统配电网的安全可靠运行带来了诸多益处,并且推动了智能配电网的发展。智能软开关(Soft normally open point,SNOP)是一种取代传统联络开关的新型电力电子设备。背靠背电压源型变流器(Back-to-back voltage source converter,B2B VSC)作为SNOP的一种拓扑结构,未来可能会取代传统配电网中的部分联络开关或连接开关,改善配电网运行的性能和灵活性。对B2B VSC的运行方式进行了介绍,针对于不同的需求,详细描述了B2B VSC的控制策略;针对于配电网中存在的典型电能质量问题,探讨了B2B VSC对典型电能质量问题的隔离能力,通过仿真以及试验进行了验证。

关键词: SNOP, 背靠背电压源型变流器, 电能质量, 隔离能力

Abstract:

With the application of power electronic equipment in the distribution network, it has brought many benefits to the safe and reliable operation of the traditional distribution network and promoted the development of the intelligent distribution network. Soft normally open point(SNOP) is a new type of power electronic equipment that replaces traditional mechanical switches. As a kind of SNOP, back-to-back voltage source converter (B2B VSC), may replace some interconnection switches or section switches in the traditional distribution network in the future, improving the flexibility of the distribution network operation. The operation mode of B2B VSC and the control strategy under different working conditions are described in detail. In view of the typical power quality problems in distribution network, the isolation ability of B2B VSC to typical power quality problems is discussed, and finally verified by simulation and experiment.

Key words: SNOP, back-to-back voltage source converter, power quality, isolation ability

中图分类号:

TM561

金庆忍,郭敏,姚知洋. 背靠背电压源型变流器控制策略及其对电能质量问题的隔离能力研究^*[J]. 电气工程学报, 2020, 15(3): 120-127.

JIN Qingren,GUO Min,YAO Zhiyang. Research on Control Strategy of Back-to-back VSC and Its Isolation Ability to Power Quality Problems[J]. Journal of Electrical Engineering, 2020, 15(3): 120-127.

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交/直流侧	元器件	参数
VSC1	电压源/V	311
	滤波电感/mH	1.5
	滤波电容/μF	50
VSC2	负载/Ω	5
	滤波电感/mH	1.5
	滤波电容/μF	50
直流侧	电容/μF	2 200

	VSC1(扰动侧)	VSC2(负载侧)
电压谐波	电压总畸变 THD=15.8% 电流总畸变 THD=5.6%	电压总畸变 THD=0.9% 电流总畸变 THD=0.9%
电压暂降	暂降深度80%	未发生暂降
三相电压不平衡度(%)	4.2	3.1

背靠背电压源型变流器控制策略及其对电能质量问题的隔离能力研究^*

Research on Control Strategy of Back-to-back VSC and Its Isolation Ability to Power Quality Problems

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