基于ERGA和混合H_2/H_∞方法的交直流并联系统分散控制
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摘要
提出一种基于有效相对增益阵列和混合H_2/H_∞方法的交直流并联系统分散控制方法。该方法首先根据有效相对增益阵列(ERGA)指标和总体最小二乘-旋转不变技术确定附加阻尼控制器安装地点和反馈信号配对方案,再基于混合H_2/H_∞控制理论设计分散控制器,抑制交直流并联输电系统中存在的区域间和区域内低频振荡。有效相对增益阵列指标考虑了传递函数矩阵的动态和静态过程,混合H_2/H_∞控制理论可计及控制代价和系统的不确定性。EMTDC/PSCAD实例仿真证明了控制器的有效性。
The HVDC and excitation decentralized controllers for parallel AC-DC system based on effective relative gain array and mixed H2/H∞ control are proposed. The results of effective relative gain array(ERGA) which combines the advantage of both relative gain array and dynamic relative gain array studies suggest the effect of control loop configurations. Based on the ERGA analysis and multi objective mixed H2/H∞ control synthesis, the designed controllers which simultaneously consider the output disturbance rejection, ensure the robustness against model uncertainties, and reduce the control cost could provide efficient damping against the inter-area and local modes of oscillations. The effectiveness of the new design is demonstrated with EMTDC/PSCAD simulation.
The HVDC and excitation decentralized controllers for parallel AC-DC system based on effective relative gain array and mixed H2/H∞ control are proposed. The results of effective relative gain array(ERGA) which combines the advantage of both relative gain array and dynamic relative gain array studies suggest the effect of control loop configurations. Based on the ERGA analysis and multi objective mixed H2/H∞ control synthesis, the designed controllers which simultaneously consider the output disturbance rejection, ensure the robustness against model uncertainties, and reduce the control cost could provide efficient damping against the inter-area and local modes of oscillations. The effectiveness of the new design is demonstrated with EMTDC/PSCAD simulation.
引文
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[2]XIONG Qiang,CAI Wenjian,HE Maojun.A practical loop paring criterion for multivariable processes[J].Journal of Process Control,2005,15(7):741-747.
[3]李德葆,陆秋海.实验模态分析及应用[M].北京:科学出版社,2001.
[4]贺静波,李立浧,陈辉祥,等.基于广域信息的电力系统阻尼控制器反馈信号选择[J].电力系统自动化,2007,31(9):6-10.HE Jingbo,LI Licheng,CHEN Huixiang,et al.Selection of feedback signal for power system damping controller based on wide area measurements[J].Automation of Electric Power Systems,2007,31(9):6-10.
[5]李海琛,董萍,刘明波,等.基于相对增益矩阵和Prony技术的南方电网FACTS和HVDC之间交互影响分析[J].电网技术,2012,36(8):169-174.LI Haichen,DONG Ping,LIU Mingbo,et al.Analysis on interaction between FACTS devices and HVDC power transmission system in china southern power grid based on relative gain array and Prony technology[J].Power System Technology,2012,36(8):167-174.
[6]AVOY T M,ARKUN Y,CHEN R,et al.A new approach to defining a dynamic relative gain[J].Control Engineering Practice,2003,11(8):907-914.
[7]俞立.鲁棒控制——线性矩阵不等式处理方法[M].北京:清华大学出版社,2002.
[8]SCHERER C,GAHINET P,CHILALI M.Multiobjective output-feedback control via LMI optimization[J].IEEE Transactions on Automatic Control,1997,42(7):896-911.
[9]赵睿,张英敏,李兴源,等.提高送端多直流落点系统暂态稳定性的非线性控制策略[J].电力系统保护与控制,2011,39(15):7-12.ZHAO Rui,ZHANG Yingmin,LI Xingyuan,et al.Nonlinear control strategy for improving the transient stability of sending ends multi-feed HVDC system[J].Power System Protection and Control,2011,39(15):7-12.
[10]BO Z Q,LIN X N,WANG Q P,et al.Development of power protection and control[J].Protection and Control of Modern Power Systems,2016,1(1):1-8.
[11]姚其新,张侃君,韩情涛,等.龙泉换流站直流控制保护系统运行分析[J].电力系统保护与控制,2015,43(11):142-147.YAO Qixin,ZHANG Kanjun,HAN Qingtao,et al.Operation analysis of Longquan converter station HVDC control and protection system[J].Power System Protection and Control,2015,43(11):142-147.
[12]顾威,李兴源,陈建国,等.基于瞬时无功理论的SVC抑制次同步振荡的附加控制设计[J].电力系统保护与控制,2015,43(5):107-111.GU Wei,LI Xingyuan,CHEN Jianguo,et al.Additional control design of SVC for mitigating subsynchronous oscillation based on instantaneous reactive power theory[J].Power System Protection and Control,2015,43(5):107-111.
[13]龙智,杨柳,姚文峰.广东电网远景直流落点优化研究[J].电力系统保护与控制,2016,44(10):145-150.LONG Zhi,YANG Liu,YAO Wenfeng.Guangdong power grid DC placement optimization[J].Power System Protection and Control,2016,44(10):145-150.
[14]梅生伟,申铁龙,刘康志.现代鲁棒控制理论与应用[M].2版.北京:清华大学出版社,2008.
[15]魏韡,梅生伟,张雪敏.先进控制理论在电力系统中的应用综述及展望[J].电力系统保护与控制,2013,41(12):143-153.WEI Wei,MEI Shengwei,ZHANG Xuemin.Review of advanced control theory and application in power system[J].Power System Protection and Control,2013,41(12):143-153.