VSC-HVDC交直流混合系统多时间尺度暂态特性建模与分析
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摘要
随着大规模电力电子设备的并网,传统电网的建模方式已经不能完全适用于现代大规模交直流混合系统。为满足现代交直流混合系统暂态特性分析的需要,提出了建立含VSC-HVDC交直流混合系统多时间尺度暂态模型。VSC-HVDC系统控制器采用矢量控制,内环控制采用基于α-β静止坐标系的建模方式,该建模方式解决了传统d-q旋转坐标系下不能完全解耦的问题。在ETSDAC/PSASP仿真平台上建立了机电-电磁暂态模型,同时在MATLAB/Simulink平台上建立了电磁暂态模型,针对不同类型的直流短路故障,分别在两种模型上进行暂态特性仿真分析。结果显示,在暂态特性上机电-电磁暂态模型比电磁暂态模型更加精确。
With the continuous interconnection of large-scale power and electronic equipment,the traditional power grid modeling method can not be fully applied to the modern large-scale AC/DC hybrid system. In order to meet the needs of transient analysis of modern AC/DC hybrid system, a multi-time scale transient model of AC/DC hybrid system with VSC-HVDC is proposed.The VSC-HVDC system controller adopts vector control, and the inner loop control is modeled in a α-βstatic coordinate system. This modeling method solves the problem of inaccurate decoupling in the traditional d-q rotating coordinate system. The electromechanical-electromagnetic transient model is built on ETSDAC/PSASP and the electromagnetic transient model is built on MATLAB/simulink. For different types of short-circuit faults, the transient characteristics of the two models are analyzed. The results show that the electromechanical-electromagnetic transient model is more accurate than the electromagnetic transient model in the transient characteristics.
With the continuous interconnection of large-scale power and electronic equipment,the traditional power grid modeling method can not be fully applied to the modern large-scale AC/DC hybrid system. In order to meet the needs of transient analysis of modern AC/DC hybrid system, a multi-time scale transient model of AC/DC hybrid system with VSC-HVDC is proposed.The VSC-HVDC system controller adopts vector control, and the inner loop control is modeled in a α-βstatic coordinate system. This modeling method solves the problem of inaccurate decoupling in the traditional d-q rotating coordinate system. The electromechanical-electromagnetic transient model is built on ETSDAC/PSASP and the electromagnetic transient model is built on MATLAB/simulink. For different types of short-circuit faults, the transient characteristics of the two models are analyzed. The results show that the electromechanical-electromagnetic transient model is more accurate than the electromagnetic transient model in the transient characteristics.
引文
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[2]汤广福,罗湘,魏晓光.多端直流输电与直流电网技术[J].中国电机工程学报,2013,33(10):8-17.
[3]汤勇.电力系统数字仿真技术的现状与发展[J].电力系统自动化,2002,26(17):66-70.
[4]Dommel H W.EMTP Theory Nook[M].Vancouver:Microtran Power System Analysis Corporation,1992.
[5]Chiniforoosh S,Jatskevich J,Yazdani A,et al.Definitions and applications of dynamic average models for analysis of power systems[J].IEEE Transactions on Power Delivery,2010,25(4):2655-2669.
[6]Saad H,Peralta J,Dennetiere S,et al.Dynamic averaged and simplified models for MMC-based HVDCtransmission systems[J].IEEE Transactions on Power Delivery,2013,28(3):1723-1730.
[7]Xu J,Gole A M,Zhao C Y.The use of averaged-value model of modular multilevel converter in DC grid[J].IEEE Transactions on Power Delivery,2015,30(2):519-528.
[8]Kundur P.Power System Stability and Control[M].New York:McGraw-Hill,1993.
[9]杨晓楠,陈红坤,缪云,等.一种VSC-HVDC控制系统的PI参数整定方法[J].现代电力出版社,2015,32(4):68-73.
[10]宁佳,张继元,舒杰,等.基于模糊PI控制的大功率光伏模拟器[J].可再生能源,2017,35(4):559-565.
[11]黄秀琼,牛成鸿,陈卫东,等.直流汇流型户用微电网并网逆变器控制策略研究[J].可再生能源,2014,32(7):928-932.
[12]杨思祥,李国杰,阮思烨.应用于DFIG风电场的VSC-HVD控制策略[J].电力系统自动化,2007,31(19):64-67.
[13]叶华,安婷,裴玮,等.含VSC-HVDC交直流系统多时间尺度暂态建模与仿真分析[J].中国电机工程学报,2017,37(2):1897-1908.
[14]Beerten J,Gomis-Bellmunt O,Guillaud X,et al Modelling and control of HVDC grids:a key challenge for the future power system[A].Proceedings of the 18th Power System Computation Conference[C].Wroclaw:PSCC,2014.1-21.
[15]Strunz K,Shintaku R,Gao F.Frequency-adaptive network modeling for integrative simulation of natural and envelope waveforms in power systems and circuits[J].IEEE Transactions on Circuits and SystemsⅠ,2006,53(12):2788-2803.
[16]Gao F,Strunz K.Frequency-adaptive power system modeling for multi-scale simulation of transients[J].IEEE Transactions on Power Systems,2009,24(2):561-571.
[17]Ye H.Multi-scale frequency and location adaptive simulation of power systems transients[D].Berlin:Technical University of Berlin,2013.
[18]Ye H,Gao F,Strunz K,et al.Multi-scale modeling and simulation of synchronous machine in phase-domain[A].Proceedings of the 3rd IEEE PES International Conference on Innovative Smart Grid Technologies(ISGT)[C].Berlin:IEEE,2012.1-6.
[19]Zhang P,Marti J R,Dommel H W.Shifted-frequency analysis for EMTP simulation of power-system dynamics[J].IEEE Transactions on Circuits and Systems:Regular Paper,2010,57(9):2564-2574.
[20]Fan S,Ding H.Time domain transformation method for accelerating EMTP simulation of power system dynamics[J].IEEE Transactions on Power Systems,2012,27(4):1778-1787.
[21]Marti J R,Dommel H W,Bonatto B D,et al.Shifted frequency analysis(SFA)concepts for EMTP modeling and simulation of power system Dynamics[A].Proceedings of the 18th Power System Computation Conference[C].Wroclaw:PSCC,2014.1-8.