链式STATCOM的高效电磁暂态仿真模型
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摘要
针对级联多电平结构的链式静止同步补偿器(static synchronous compensator,STATCOM)在诸如MATLAB、PSCAD/EM TDC等电磁暂态仿真环境中仿真速度极慢的问题,基于Dommel等值计算原理,提出一种链式STATCOM高效电磁暂态仿真模型,并利用戴维南等效定理将桥臂支路用受控电压源和数值计算模块代替,同时引入理想开关器件的特性降低计算量。该模型保留了子模块内部的暂态特性以及与控制系统之间的接口,具有适用性广、精确性高和加速效果明显的特点。使用PSCAD/EMTDC软件对所提出的模型在不同工况下进行了仿真,验证了该模型的有效性和精确性。
Aiming at a problem of very slowsimulation speed of the cascade static synchronous compensator( STATCOM) with cascaded multi-level structure in electromagnetic transient simulation environment such as MATLAB and PSCAD/EMTDC,this paper proposes a kind of efficient electromagnetic transient simulation model for cascade STATCOMbased on Dommel equivalent calculation principle. It makes use of Thevenin theorem to replace the bridge arm branches by controlled voltage source and numerical calculation modules,and introduces characteristics of ideal switching devices to reduce computation quantity. This model preserves inner transient characteristics of submodules and interface with the control system,which has features of wide adaptability,high precision and obvious acceleration effect. It uses PSCAD/EMTDC software to make simulation on the proposed model under different working conditions to verify effectiveness and precision of the model.
Aiming at a problem of very slowsimulation speed of the cascade static synchronous compensator( STATCOM) with cascaded multi-level structure in electromagnetic transient simulation environment such as MATLAB and PSCAD/EMTDC,this paper proposes a kind of efficient electromagnetic transient simulation model for cascade STATCOMbased on Dommel equivalent calculation principle. It makes use of Thevenin theorem to replace the bridge arm branches by controlled voltage source and numerical calculation modules,and introduces characteristics of ideal switching devices to reduce computation quantity. This model preserves inner transient characteristics of submodules and interface with the control system,which has features of wide adaptability,high precision and obvious acceleration effect. It uses PSCAD/EMTDC software to make simulation on the proposed model under different working conditions to verify effectiveness and precision of the model.
引文
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[2]TAYLOR C W,SCOTT G,HAMMAD A.Static var compensator models for pow er flow and dynamic performance simulation[J].IEEE Transactions on Power Systems,1994,9(1):229-240.
[3]周建丰,顾亚琴,韦寿祺.SVC与STATCOM的综合比较分析[J].电力自动化设备,2008,27(12):57-60.
[4]LEE C K,LEUNG J S K,HUI S Y R,et al.Circuit-level comparison of STATCOM technologies[J].IEEE Transactions on Pow er Electronics,2003,18(4):78-84.
[5]王轩,魏宏,欧朱建,等.一种抑制HVDC换相失败的STATCOM补偿方案[J].电力系统保护与控制,2018,46(5):135-142.WANG Xuan,WEI Hong,OU Zhujian,et al.A STATCOMcompensation scheme for suppressing commutation failure in HVDC system[J].Pow er System Protection and Control,2018,46(5):135-142.
[6]刘刚,张扬,高志军,等.基于不对称分析的高压链式STATCOM的低压穿越控制策略[J].电力系统保护与控制,2015,43(21):112-119.LIU Gang,ZHANG Yang,GAO Zhijun,et al.Low voltage ride through control strategy of high voltage cascaded STATCOMbased on asymmetric analysis[J].Pow er System Protection and Control,2015,43(21):112-119.
[7]黄伟雄,胡广振,王永源,等.南方电网35 kV±200 Mvar链式STATCOM现场试运行[J].电力系统自动化,2013,37(19):122-131.HUANG Weixiong,HU Guangzhen,WANG Yongyuan,et al.On-site Commissioning of35kV±200M var Cascade STATCOM in China Southern Pow er Grid[J].Automation of Electric Pow er Systems,2013,37(19):122-131.
[8]Manitoba-HVDC-Research-Centre.EMTDCTMUsers Guide V4.3.1[OL].2013.https://hvdc.ca/know ledge-library/reference-material.
[9]许建中,赵成勇,刘文静.超大规模MMC电磁暂态仿真提速模型[J].中国电机工程学报,2013,33(10):114-120.XU Jianzhong,ZHAO Chenyong,LIU Wenjing.Accelerated model of ultra-large scale M M C in electronicmagnetic transient simulations[J].Proceedings of the CSEE,2013,33(10):114-120.
[10]GNANARATHNA U N,GOLE A M,JAYASINGHE R P.Efficient modeling of modular multilevel HVDC converters(MMC)on electromagnetic transient simulation programs[J].IEEE Transactions on Pow er Delivery,2011,26(1):316-324.
[11]喻锋,王西田,林卫星,等.模块化多电平换流器快速电磁暂态仿真模型[J].电网技术,2015,39(1):257-263.YU Feng,WANG Xitian,LIN Weixing,et al.Fast electromagnetic transient simulation models of modular multilevel converter[J].Pow er System Technology,2015,39(1):257-263.
[12]许建中.模块化多电平换流器电磁暂态高效建模方法研究[D].北京:华北电力大学,2014.
[13]于鹏,季振东,赵剑锋.基于CPS-SPWM级联型脉冲宽度调制整流器设计[J].广东电力,2012,25(6):62-68.YU Peng,JI Zhendong,ZHAO Jianfeng.Design of cascading pulse w idth modulation rectifier based on CPS-SPWM[J].Guangdong Electric Pow er,2012,25(6):62-68.
[14]王立乔,黄玉水,刘兆燊,等.多电平变流器多载波PWM技术的研究[J].浙江大学学报,2005,39(7):1025-1030.WANG Liqiao,HUANG Yushui,LIU Zhaoshen,et al.Research on multi-carrier PWM technique for multi-level converters[J].Journal of Zhejiang University,2005,39(7):1025-1030.