中国电机工程学报2017，Vol.37Issue(6)：1777-1786,10.DOI:10.13334/j.0258-8013.pcsee.160223
电网不平衡时采用改进无差拍控制的并网变流器不同约束条件的实现
Implementations of Different Constraint Conditions Based on Improved Deadbeat Control for Grid-connected Converter Under Unbalanced Grid Voltage
姜卫东 1汪磊 1王永生 1姚填 2丁星星1
作者信息
- 1. 合肥工业大学电气与自动化工程学院,安徽省合肥市230009
- 2. 南京埃斯顿自动控制技术有限公司,江苏省南京市210000
- 折叠
摘要
Abstract
The mathematical model in αβ frame of a grid connected converter was described under unbalanced grid voltage.Deadbeat control (DBC) method was adopted to track reference currents to implement different constraint conditions.Then positive and negative sequence components were not required to be separated from grid connected currents.To the problem of delay compensation in DBC,a two-step prediction method was used to compensate time delay.However,in a practical system,sampling errors of currents are inevitable.In this paper,an improved DBC method with current correction was proposed to suppress sampling errors,which can improve the capability of interference suppression for system.Finally,the experimental setup of a grid-connected converter was built,and the effectiveness of the proposed method was verified by experimental results.关键词
不平衡电网电压/无差拍控制/延时补偿/采样误差/干扰抑制Key words
unbalanced grid voltage/deadbeat control (DBC)/delay compensation/sampling errors/interference suppression分类
信息技术与安全科学引用本文复制引用
姜卫东,汪磊,王永生,姚填,丁星星..电网不平衡时采用改进无差拍控制的并网变流器不同约束条件的实现[J].中国电机工程学报,2017,37(6):1777-1786,10.
