基于有源滤波器的电网三相负载不平衡补偿策略

doi:10.11985/2019.04.011

摘要/Abstract

摘要：

配电网三相不平衡问题会影响电能质量、造成电力系统不稳定运行。目前,电力系统常用的接线方式为三相四线制,传统的针对三相三线制的补偿器只能抑制负序电流,而不能消除零序电流。针对该问题,提出了利用有源电力滤波器进行负载补偿。首先建立了有源滤波器的数学模型,然后分析了补偿电流的监测方法,推导了有源电力滤波器的补偿特性,并在Matlab/Simulink中搭建了三相四线制的补偿模型,对正常性不平衡和故障性不平衡进行了仿真,通过试验结果验证了该方案能够有效减小三相负荷不平衡度。

关键词: 三相不平衡, 三相四线制, 有源电力滤波器, 负载补偿

Abstract:

Three-phase unbalance of distribution network will affect power quality and cause unstable operation of power system. At present, three-phase four-wire system is commonly used in power system. The traditional compensator for three-phase three-wire system can only suppress negative sequence current, but cannot eliminate zero sequence current. To solve this problem, a method that use active power filter for load compensation is proposed. Firstly, the mathematical model of active power filter is established, then the monitoring method of compensation current is analyzed, and the compensation characteristics of active power filter are deduced. A three-phase four-wire compensation model is built in Matlab/Simulink. The normal and fault-type unbalances are simulated. The experimental results verify the proposed model. The scheme can effectively reduce the unbalance of three-phase load.

Key words: Three-phase unbalance, three-phase four-wire system, active power filter, load compensation

中图分类号:

TM714

曹洪,夏令,刘盛,蔡祖军,王浩. 基于有源滤波器的电网三相负载不平衡补偿策略[J]. 电气工程学报, 2019, 14(4): 72-78.

Hong CAO,Ling XIA,Sheng LIU,Zujun CAI,Hao WANG. Three-phase Load Unbalance Compensation Strategy Based on Active Power Filter[J]. Journal of Electrical Engineering, 2019, 14(4): 72-78.

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参考文献 11

[1]	陈磊, 胡晓菁, 史红辉 , 等. 配变三相不平衡解决方案及控制策略[J]. 电力电容器与无功补偿, 2016,37(3):95-99.
	Chen Lei, Hu Xiaojing, Shi Honghui , et al. Solution and control strategy of three-phase unbalance in distribution transformer[J]. Power Capacitor & Reactive Power Compensation, 2016,37(3):95-99.
[2]	林海雪 . 电力系统的三相不平衡[M]. 北京：中国电力出版社, 1998.
[3]	杨云龙, 王凤清 . 配电变压器三相不平衡运行带来的附加损耗、电压偏差及补偿方法[J]. 电网技术, 2004,28(8):73-76.
	Yang Yunlong, Wang Fengqing . Additional loss and voltage deviation caused by unbalanced operation of distribution transformer and countermeasures[J]. Power System Technology, 2004,28(8):73-76.
[4]	郭民怿 . 配电变压器负序电流动态抑制方法及实验研究[D]. 重庆:重庆大学, 2014.
[5]	景翔, 陈歆技, 吴杰 . 三相不平衡系统的无功补偿控制[J]. 电力自动化设备, 2003(1):1-3.
	Jing Xiang, Chen Xinji, Wu Jie , et al. Reactive power compensation control for three-phase unbalanced system[J].Electric Power Automation Equipment, 2003(1):1-3.
[6]	Tung N X, Fujita G, Horikoshi K . Phase load balancing in distribution power system using discrete passive compensator[J]. IEEJ Transactions on Electrical & Electronic Engineering, 2010,5(5):539-547.
[7]	Ghaeb J A, Aloquili O M . High performance reactive control for unbalanced three-phase load[J]. European Transactions on Electrical Power, 2010,20(6):710-722.
[8]	戴珂, 刘聪, 李彦龙 , 等. 并联型APF对两类非线性负载的谐波补偿特性研究[J]. 电工技术学报, 2013,28(9):79-85.
	Dai Ke, Liu Cong, Li Yanlong , et al. Study on harmonic compensation characteristics of shunt APF to two types ofnonlinear loads[J]. Transactions of China Electrotechnical Society, 2013,28(9):79-85.
[9]	徐群伟, 钟晓剑, 胡健 , 等. 基于误差迭代PI和改进重复控制的APF补偿电流控制[J]. 电力系统自动化, 2015(3):124-131.
	Xu Qunwei, Zhong Xiaojian, Hu Jian , et al. Com- pensation current control of APF based on error iteration PI and improved repetitive control[J]. Automation of Electric Power System, 2015(3):124-131.
[10]	姚为正, 王群, 刘进军 , 等. 有源电力滤波器对不同类型谐波源的补偿特性[J]. 电工技术学报, 2000,15(6):40-44,22.
	Yao Weizheng, Wang Qun, Liu Jinjun , et al. Compensation characteristics of active power filter to different types of harmonic sources[J]. Transactions of China Electrotechnical Society, 2000,15(6):40-44,22.
[11]	张树全, 戴珂, 谢斌 , 等. 多同步旋转坐标系下指定次谐波电流控制[J]. 中国电机工程学报, 2010,30(3):55-62.
	Zhang Shuquan, Dai Ke, Xie Bin , et al. Selective harmonic current control based on multiple synchronous rotating coordinates[J]. Proceedings of the CSEE, 2010,30(3):55-62.