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中南大学学报(自然科学版)

Journal of Central South University

第47卷    第1期    总第257期    2016年1月

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文章编号:1672-7207(2016)01-0123-07
基于双层优化结构的统一潮流控制器阻尼控制策略
李婷1, 2,杨波3

(1. 中南大学信息科学与工程学院,湖南长沙,410083;
2. 湖南广播电视大学理工教学部,湖南长沙,410004;
3. 武汉大学电气工程学院,湖北武汉,430072
)

摘 要: 针对统一潮流控制器(UPFC)阻尼控制器在镇定信号传输存在时滞时会导致电力系统阻尼性能降低甚至失稳的问题,建立计及信号传输时滞的UPFC阻尼控制模型,提出综合考虑阻尼比和时滞稳定裕度的UPFC阻尼控制策略设计方法,将该设计问题转化为约束优化问题,并提出求解该问题的双层优化结构算法(TLOSA),其内层采用基于自由权矩阵的线性矩阵不等式(LMI)方法求解电力系统时滞稳定裕度,外层采用粒子群优化算法获取最优阻尼控制策略。研究结果表明:该算法具有保守性低和易于实现等优点;利用该方法可以获得最优的UPFC阻尼控制策略,使得电力系统既能有效阻尼低频振荡,又能容忍一定的信号传输时滞。

 

关键词: 统一潮流控制器;时滞系统;灵活交流输电系统;辅助阻尼控制器;粒子群优化算法

Damping control strategy for UPFC based ontwo-layer optimization structure
LI Ting1, 2, YANG Bo3

1. School of Information Science and Engineering, Central South University, Changsha 410083, China;
2. Department of Science and Engineering, Hunan Radio & TV University, Changsha 410004, China;
3. School of Electrical Engineering, Wuhan University, Wuhan 430072, China

Abstract:Damping controller of unified power flow controller (UPFC) may degrade its damping performance or even cause power system instability when its stabilizing signal is delayed for a certain period. Based on the newly constructed UPFC damping control model with signal transmission delay, UPFC damping control strategy design problem was discussed by taking into account of damping ratio and delay margin. The design problem was converted to a constrained optimization problem and then a two-layer optimization structure algorithm (TLOSA) was proposed to solve it. In TLOSA, delay margin was solved by free-weight matrix based linear matrix inequality (LMI) method for inner layer and optimal damping control strategy was searched by particle swarm optimization for outer layer. The results show that the proposed algorithm has low conservativeness and is easy to be implemented. The proposed algorithm can obtain optimal UPFC damping control strategy which ensures that power system can damp low frequency oscillation effectively and tolerance a certain signal transmission delay.

 

Key words: unified power flow controller (UPFC); time-delay system; flexible AC transmission systems (FACTS); supplementary damping controller; particle swarm optimization

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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