电工技术学报  2017, Vol. 32 Issue (14): 205-216    DOI: 10.19595/j.cnki.1000-6753.tces.L70752
电力系统 |
考虑数字控制延时影响的LCL型配电网静止同步补偿器稳定性分析
夏伟, 康劲松
同济大学电子与信息工程学院 上海 201804
Digital Control Time-Delays Affected Stability Analysis of LCL Type Distribution Static Compensator
Xia Wei, Kang Jinsong
School of Electronic and Information Engineering Tongji University Shanghai 201804 China
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摘要 介绍一种考虑数字控制延时影响时LCL型配电网静止同步补偿器(D-STATCOM)的系统稳定性研究方法。通过分析延时给有源阻尼及其等效的虚拟电阻带来的影响,揭示延时环节与系统稳定性的内在联系。引入一个有源阻尼系数的临界值,将滤波器谐振频率划分成高、低两个频域,再通过判断有源阻尼系数与临界值之间的大小关系,分别在两个不同的谐振频域内推导出计入数字控制延时影响时的系统稳定条件。仿真和实验分别对研究方法进行了验证。
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夏伟
康劲松
关键词 LCL型滤波器配电网静止同步补偿器延时稳定性    
Abstract:This paper introduced a method of system stability for LCL type D-STATCOM with active damping when the effect of digital controlling time-delays is considered. By analyzing the impact on active damping and its equivalent virtual impedance caused by time-delays, the inherent relationship between time-delays and system stability is illustrated. Specially, a critical value of active damping coefficient is proposed to separate LCL resonance frequency into two distinct resonance frequency regions. And then the necessary conditions for system stability are deduced by identifying the relationship between the active damping coefficient and the critical value in the separated high and low resonance frequency regions. Simulation and experimental results verified the presented method.
Key wordsLCL    type    filter,    distribution-static    compensator,    time-delays    stability   
收稿日期: 2016-08-22      出版日期: 2017-08-01
PACS: TM464  
基金资助:国家重点研发计划资助项目(2016YFB0100700)
作者简介: 夏 伟 男,1981年生,博士研究生,研究方向为并网逆变器技术。E-mail: 485_xiaw@tongji.edu.cn
引用本文:   
夏伟, 康劲松. 考虑数字控制延时影响的LCL型配电网静止同步补偿器稳定性分析[J]. 电工技术学报, 2017, 32(14): 205-216. Xia Wei, Kang Jinsong. Digital Control Time-Delays Affected Stability Analysis of LCL Type Distribution Static Compensator. Transactions of China Electrotechnical Society, 2017, 32(14): 205-216.
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