Research on Control Strategy of Vienna Rectifier Under Unbalanced Grid Condition

doi:10.16628/j.cnki.2095-8188.2022.04.003

Abstract

Abstract:

When the grid voltage is unbalanced,the original control strategy will generate a large amount of third harmonic current,and the stability of the rectifier operation in Vienna will be seriously affected.Based on the analysis of the causes of rectifier operation power pulsation when the grid voltage is unbalanced,the quasi-PR regulator control strategy is applied to inject an appropriate amount of negative sequence current into the grid side to suppress the active power and DC side voltage pulsation.The algorithm can separate the grid phase sequence precisely and quickly,which makes the control of the system faster.Finally,the feasibility of the control strategy is verified by MATLAB/Simulink.

Key words: harmonic current, Vienna rectifier, unbalanced grids, quasi-PR regulator

CLC Number:

TM721.1

HE Chen, HUANG Haihong. Research on Control Strategy of Vienna Rectifier Under Unbalanced Grid Condition[J]. LOW VOLTAGE APPARATUS, 2022, 0(4): 12-18.

Figures/Tables 16

References 16

[1]	刘迪, 杨海涛, 杨为, 等. 电网电压不平衡时PWM整流器脉动控制策略研究[J]. 电器与能效管理技术, 2019(10):8-16.
[2]	NAQVI S B Q, KUMAR S, SINGH B. Weak grid integration of a single-stage solar energy conversion system with power quality improvement features under varied operating conditions[J]. IEEE Transactions on Industry Applications, 2021, 57(2):1303-1313. doi: 10.1109/TIA.2021.3051114
[3]	董德智, 海良豪, 王悦. PWM整流器一般不平衡分析和控制策略研究[J]. 电子测量与仪器学报, 2019, 33(6):112-121.
[4]	黄海宏, 张庭茂, 魏亚坤, 等. 电压不平衡时单同步坐标系锁相环的改进算法[J]. 电子测量与仪器学报, 2016, 30(6):937-944.
[5]	邓玮璍, 周江林. 孤岛微网DC/AC逆变器电压H_∞鲁棒控制[J]. 电子测量与仪器学报, 2020, 34(3):195-200.
[6]	杨俊伟, 贾道杰. 基于VIENNA整流器的控制系统设计[J]. 电子测量技术, 2018, 41(3):6-11.
[7]	巩兆伟, 杜光辉. 直流微电网低电压穿越控制仿真研究[J]. 国外电子测量技术, 2020, 39(3):25-29.
[8]	毛钧毅, 韩松, 李洪乾. 采用Spiked协方差模型与“相变”现象的电网不平衡扰动评估[J]. 仪器仪表学报, 2020, 41(12):208-216.]
[9]	冯兴田, 崔晓, 马文忠, 等. 基于电网不平衡的三相Vienna整流器双闭环控制策略[J]. 电网技术, 2021, 45(5):1976-1984.
[10]	雷芸, 肖岚, 郑昕昕. 不平衡电网下无锁相环三相并网逆变器控制策略[J]. 中国电机工程学报, 2015, 35(18):4744-4752.
[11]	章玮, 王宏胜, 任远, 等. 不对称电网电压条件下三相并网型逆变器的控制[J]. 电工技术学报, 2010, 25(12):103-110.
[12]	王仰铭, 孙丹, 年珩, 等. 不平衡电网下自同步虚拟同步机拓展功率控制策略研究[J]. 电网技术, 2020, 44(9):3368-3375.
[13]	周皓, 童朝南, 刘宝其, 等. 电网不平衡条件下的光伏并网发电控制策略[J]. 电力系统自动化, 2015, 39(12):27-32.
[14]	李二伟. 基于LCL滤波的电网不平衡条件下VIENNA整流器控制策略的研究[D]. 合肥: 合肥工业大学, 2020.
[15]	郑丹萍, 年珩, 李来福, 等. 不平衡负载下三端口电力电子变压器二倍频功率解耦控制策略[J]. 中国电机工程学报, 2020, 40(11):3643-3654.
[16]	张永昌, 曲昌琦. 不平衡电网下脉宽调制整流器模型预测直接功率控制[J]. 电力系统自动化, 2015, 39(4):69-75.

控制策略	A相电流总谐波含量/%
传统控制策略	10.94
PR控制器	6.01
准PR控制器	4.97