含同步调相机的HVDC输电系统电压稳定控制策略
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摘要
传统高压直流(HVDC)输电系统的半控特性导致系统运行过程中需要大量无功补偿装置,系统运行过程中若出现电压波动,将引起电能质量下降和系统稳定性降低等问题,采用同步调相机提供系统运行中所需的无功得到广泛认可。本文针对含有同步调相机并网的HVDC输电系统电压稳定控制进行研究,对HVDC系统逆变侧接入同步调相机前后发生小扰动、中扰动和大扰动情况下逆变侧母线的电压波动情况进行对比,得到同步调相机接入对母线电压的补偿效果,并于PSCAD/EMTDC仿真平台上搭建了同步调相机并网高压直流输电模型,仿真结果验证了理论分析的有效性。
The operation of the traditional high-voltage direct-current(HVDC)transmission system requires a large number of reactive power compensation devices due to its semi-control characteristics. Accordingly,the emergence of voltage oscillations may lead to the degradation of power quality and system stability. The integration of synchronous condenser(SC)to provide the necessary reactive power for the system has been widely recognized. In this paper,the voltage stabilization control of an HVDC transmission system with the integration of an SC is investigated. Comparative studies are conducted for the HVDC system under small,medium and large disturbances with and without the integration of an SC on the inverter side,and the compensation effect of SC integration on bus voltage is obtained. The HVDC transmission system with the integration of an SC is established on the simulation platform of PSCAD/EMTDC,and simulation results verify the effectiveness of the theoretical analysis.
The operation of the traditional high-voltage direct-current(HVDC)transmission system requires a large number of reactive power compensation devices due to its semi-control characteristics. Accordingly,the emergence of voltage oscillations may lead to the degradation of power quality and system stability. The integration of synchronous condenser(SC)to provide the necessary reactive power for the system has been widely recognized. In this paper,the voltage stabilization control of an HVDC transmission system with the integration of an SC is investigated. Comparative studies are conducted for the HVDC system under small,medium and large disturbances with and without the integration of an SC on the inverter side,and the compensation effect of SC integration on bus voltage is obtained. The HVDC transmission system with the integration of an SC is established on the simulation platform of PSCAD/EMTDC,and simulation results verify the effectiveness of the theoretical analysis.
引文
[1]温家良,吴锐,彭畅,等(Wen Jialiang,Wu Rui,Peng Chang,et al).直流电网在中国的应用前景分析(Analysis of DC grid prospects in China)[J].中国电机工程学报(Proceedings of the CSEE),2012,32(13):7-12.
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[4]罗钢(Luo Gang).电网可用输电能力的计算方法研究(Research on Calculation Methods of Available Transfer Capability in Power Grids)[D].武汉:华中科技大学电气与电子工程学院(Wuhan:College of Electrical&Electronic Engineering,Huazhong University of Science and Technology),2014.
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[6]王云洁,胡弢(Wang Yunjie,Hu Tao).SVC电压稳定控制和抑制低频振荡交互影响研究(Interaction study of SVC voltage stability control and inhibiting of low-frequency oscillation)[J].江苏电机工程(Jiangsu Electrical Engineering),2013,32(1):23-25,29.
[7]Molinas M,Suul J A,Undeland T.Low voltage ride through of wind farms with cage generators:STATCOMversus SVC[J].IEEE Trans on Power Electronics,2008,23(3):1104-1117.
[8]Mithulananthan N,Canizares C A,Reeve J,et al.Comparison of PSS,SVC,and STATCOM controllers for damping power system oscillations[J].IEEE Trans on Power Systems,2003,18(2):786-792.
[9]殷桂梁,马会艳,陈学琴(Yin Guiliang,Ma Huiyan,Chen Xueqin).电网电压波动时双馈电机的无功补偿特性分析(Reactive compensation characteristic analysis of doubly-fed inductance generator with grid voltage fluctuations)[J].电力系统及其自动化学报(Proceedings of the CSU-EPSA),2017,29(4):84-88.
[10]Wikipedia.Synchronous Condenser[EB/OL].https://en.wikipedia.org/wiki/Synchronous_condenser,2017.
[11]邹东霞,余锐,聂娟红,等(Zou Dongxia,Yu Rui,Nie Juanhong,et al).300 Mvar大型同步调相机的启动及继电保护(SFC start and relay protection of 300 Mvar large synchronous condenser)[J].电力系统保护与控制(Power System Protection and Control),2016,44(20):160-164.
[12]刘艳芹,席自强,陈昌晶.浅析无功补偿的发展[C]//湖北省电工技术学会、武汉电工技术学会2008年学术年会.武汉,中国,2008:91-94.
[13]崔艳(Cui Yan).配电网无功补偿技术的研究和应用(Research and Application on Var Compensation of the Distribution Network)[D].北京:华北电力大学电气与电子工程学院(Beijing:School of Electrical and Electronic Engineering,North China Electric Power University),2014.
[14]李林(Li Lin).引进型300MW汽轮机高压通流部分胀差监测系统的分析与实现(The Analysis and Realization of DE Monitoring System for HP Through-flow of300MW Imported-type Steam Turbine)[D].北京:华北电力大学电气与电子工程学院(Beijing:School of Electrical and Electronic Engineering,North China Electric Power University),2003.
[15]刘晓光,牟建宏,李文波(Liu Xiaoguang,Mou Jianhong,Li Wenbo).分布控制系统与现场总线控制系统的比较及现状(Comparison and current situation of distributed control system and fieldbus control system)[J].自动化与仪表(Automation&Instrumentation),2004(4):52-54.
[16]吴心语.电机冷却技术的发展[N].中国机电日报.2002-8-28.
[17]崔挺,沈阳武,张斌,等(Cui Ting,Shen Yangwu,Zhang Bin,et al).300 MVar级同步调相机对湖南电网稳定的影响研究(Influences of 300MVar synchronous condensers on the stabilities of Hunan power grid)[J].湖南电力(Hunan Electrical Power),2016,36(3):1-4,8.
[18]张宁宇,刘建坤,周前,等(Zhang Ningyu,Liu Jiankun,Zhou Qian,et al).同步调相机对直流逆变站运行特性的影响分析(Analysis on the impact of synchronous condenser on DC inverter operating characteristic)[J].江苏电机工程(Jiangsu Electrical Engineering),2016,35(3):17-20.
[2]Wang Puyu,Zhang Xiao-Ping,Coventry Paul F,et al.Start-up control of an offshore integrated MMC multi-terminal HVDC system with reduced DC voltage[J].IEEETrans on Power Systems,2016,31(4):2740-2751.
[3]陈欢,王振,杨治中,等(Chen Huan,Wang Zhen,Yang Zhizhong,et al).并联混合直流输电系统中传统直流和柔性直流暂态无功协调控制策略研究(Coordinated reactive power control approach for LCC-HVDC and VSC-HVDC in hybrid parallel HVDC system)[J].电网技术(Power System Technology),2017,41(6):1719-1725.
[4]罗钢(Luo Gang).电网可用输电能力的计算方法研究(Research on Calculation Methods of Available Transfer Capability in Power Grids)[D].武汉:华中科技大学电气与电子工程学院(Wuhan:College of Electrical&Electronic Engineering,Huazhong University of Science and Technology),2014.
[5]戴庆忠(Dai Qingzhong).同步调相机特性及应用(Extensive talk on synchronous condenser)[J].东方电气评论(Dongfang Electric Review),2016,30:47-51.
[6]王云洁,胡弢(Wang Yunjie,Hu Tao).SVC电压稳定控制和抑制低频振荡交互影响研究(Interaction study of SVC voltage stability control and inhibiting of low-frequency oscillation)[J].江苏电机工程(Jiangsu Electrical Engineering),2013,32(1):23-25,29.
[7]Molinas M,Suul J A,Undeland T.Low voltage ride through of wind farms with cage generators:STATCOMversus SVC[J].IEEE Trans on Power Electronics,2008,23(3):1104-1117.
[8]Mithulananthan N,Canizares C A,Reeve J,et al.Comparison of PSS,SVC,and STATCOM controllers for damping power system oscillations[J].IEEE Trans on Power Systems,2003,18(2):786-792.
[9]殷桂梁,马会艳,陈学琴(Yin Guiliang,Ma Huiyan,Chen Xueqin).电网电压波动时双馈电机的无功补偿特性分析(Reactive compensation characteristic analysis of doubly-fed inductance generator with grid voltage fluctuations)[J].电力系统及其自动化学报(Proceedings of the CSU-EPSA),2017,29(4):84-88.
[10]Wikipedia.Synchronous Condenser[EB/OL].https://en.wikipedia.org/wiki/Synchronous_condenser,2017.
[11]邹东霞,余锐,聂娟红,等(Zou Dongxia,Yu Rui,Nie Juanhong,et al).300 Mvar大型同步调相机的启动及继电保护(SFC start and relay protection of 300 Mvar large synchronous condenser)[J].电力系统保护与控制(Power System Protection and Control),2016,44(20):160-164.
[12]刘艳芹,席自强,陈昌晶.浅析无功补偿的发展[C]//湖北省电工技术学会、武汉电工技术学会2008年学术年会.武汉,中国,2008:91-94.
[13]崔艳(Cui Yan).配电网无功补偿技术的研究和应用(Research and Application on Var Compensation of the Distribution Network)[D].北京:华北电力大学电气与电子工程学院(Beijing:School of Electrical and Electronic Engineering,North China Electric Power University),2014.
[14]李林(Li Lin).引进型300MW汽轮机高压通流部分胀差监测系统的分析与实现(The Analysis and Realization of DE Monitoring System for HP Through-flow of300MW Imported-type Steam Turbine)[D].北京:华北电力大学电气与电子工程学院(Beijing:School of Electrical and Electronic Engineering,North China Electric Power University),2003.
[15]刘晓光,牟建宏,李文波(Liu Xiaoguang,Mou Jianhong,Li Wenbo).分布控制系统与现场总线控制系统的比较及现状(Comparison and current situation of distributed control system and fieldbus control system)[J].自动化与仪表(Automation&Instrumentation),2004(4):52-54.
[16]吴心语.电机冷却技术的发展[N].中国机电日报.2002-8-28.
[17]崔挺,沈阳武,张斌,等(Cui Ting,Shen Yangwu,Zhang Bin,et al).300 MVar级同步调相机对湖南电网稳定的影响研究(Influences of 300MVar synchronous condensers on the stabilities of Hunan power grid)[J].湖南电力(Hunan Electrical Power),2016,36(3):1-4,8.
[18]张宁宇,刘建坤,周前,等(Zhang Ningyu,Liu Jiankun,Zhou Qian,et al).同步调相机对直流逆变站运行特性的影响分析(Analysis on the impact of synchronous condenser on DC inverter operating characteristic)[J].江苏电机工程(Jiangsu Electrical Engineering),2016,35(3):17-20.