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浙江大学学报(工学版)  2013, Vol. 47 Issue (2): 339-344    DOI: 10.3785/j.issn.1008-973X.2013.02.023
电气工程、自动化技术     
单相SVG高性能补偿电流控制技术
杨昆, 陈磊, 陈国柱
浙江大学 电气工程学院,浙江 杭州 310027
High performance compensation current control strategy of #br# single-phase SVG
YANG Kun, CHEN Lei, CHEN Guo-zhu
College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China
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摘要:

针对单相静止无功发生器(SVG)应用场合无法获得瞬时无功、谐波丰富、工况复杂等特点,以提高单相SVG无功补偿精度,增强装置谐波抑制能力为目的,引入单相SVG系统PI加重复控制(PI+REP)的双环控制策略,根据系统数学模型设计数字PI内环,通过内环频率特性设计重复控制外环,将PI控制器低频段优越的动态性能和鲁棒性,与重复控制对周期信号高跟踪精度相结合,改善装置基波补偿精度和谐波抑制能力.频率特性分析表明,该控制策略可以有效消除传统PI控制在基波频率的相位滞后,并将500 Hz以内的相位滞后降低到4.5°以内.仿真和实验结果显示,在该控制策略下单相SVG的无功补偿精度和谐波抑制能力均得到了明显提高.

Abstract:

To deal with the characteristics of single-phase grid a double-loop control strategy of PI and repetitive control compound controller (PI+REP) is introduced to improve the compensation performance of single-phase static var generator (SVG). The PI controller is designed according to the mathematics model of system. And the outer repetitive controller is designed based on the frequency characteristics of inner closed-loop. It can combine superior dynamic performance and robustness of PI controller at low frequency with high tracking accuracy towards periodic signals of the repetitive one, and greatly improve the output performance of single-phase SVG. Frequency characteristics analysis indicates that the system phase lag caused by conventional PI controller is eliminated at the fundamental frequency and less than 4.5° within 500 Hz. Simulation and experimental results show that the accuracy of reactive power compensation and ability of harmonic suppression of single-phase SVG are both improved by using proposed control strategy.

出版日期: 2013-02-01
:  TM 762  
基金资助:

国家自然科学基金资助项目(51177147);浙江省重点科技创新团队资助项目(2010R50021).

通讯作者: 陈国柱,男,教授,博导.     E-mail: gzchen@zju.edu.cn
作者简介: 杨昆(1987—),男,博士生,从事大功率级联多电平DSTATCOM及电能质量控制技术研究.E-mail:yangk1022@163.com
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引用本文:

杨昆, 陈磊, 陈国柱. 单相SVG高性能补偿电流控制技术[J]. 浙江大学学报(工学版), 2013, 47(2): 339-344.

YANG Kun, CHEN Lei, CHEN Guo-zhu. High performance compensation current control strategy of #br# single-phase SVG. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 2013, 47(2): 339-344.

链接本文:

http://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2013.02.023        http://www.zjujournals.com/eng/CN/Y2013/V47/I2/339

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