特高压交直流耦合电网主变充电对特高压直流运行影响研究
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摘要
随着特高压交直流工程大规模建设和交直流耦合程度的加深,多直流馈入受端电网主变充电对直流输电及受端电网运行具有一定影响。根据规划2017年淮沪特高压交流南半环重要枢纽苏州站将投运,为了研究特高压交流苏州站启动调试期间充电对锦苏直流运行的影响,在RTDS中搭建了锦苏直流和淮沪特高压交流及周边等值交流电网,采用与锦苏直流输电工程在控制保护功能和故障下的暂态响应等方面特性一致的特高压直流控保真型装置与RTDS构成闭环仿真平台,对锦苏直流近区空充主变以及特高压交流主变后锦苏直流运行情况进行了仿真分析。结果表明,锦苏直流近区主变充电会导致锦苏直流周期性换相失败并闭锁,但是苏州特高压交流主变空充对特高压直流运行无明显影响,所得结论对淮沪特高压交流工程启动调试具有重要参考意义。
With the increasing coupling degree of UHV AC/DC system and large-scale construction of UHV AC/DCproject,main transformer charging in multi-DC feed-in receiving end power grid has certain influence on the DCtransmission and the operation of the receiving end. According to the plan,in 2017 Suzhou station for important hubof Huaihu UHVAC southern half will be put into operation,in order to study the influence of charging on the opera-tion of Jinsu UHVDC during the commissioning of UHVAC Suzhou station,in the RTDS Jinsu UHVDC and HuaiHuUHVAC equivalent power grid is built,actual control and protection device are built to form a closed loop simulationplatform with RTDS. Its performance remains highly consistent with actual UHVDC project in protection functions,behavior under fault of AC and DC and other aspects of characteristics. The operation of JinSu UHVDC near-zonetransformer and UHVAC transformer after air-charging are simulated and analyzed. The results show,transformernear JinSu UHVDC charging will lead to cyclical commutation failure and blocking,but the Suzhou UHVAC trans-former empty charge has no significant effect on the UHVDC operation basically. The conclusion is of great reference significance for the commissioning of HuaiHu UHVAC project.
With the increasing coupling degree of UHV AC/DC system and large-scale construction of UHV AC/DCproject,main transformer charging in multi-DC feed-in receiving end power grid has certain influence on the DCtransmission and the operation of the receiving end. According to the plan,in 2017 Suzhou station for important hubof Huaihu UHVAC southern half will be put into operation,in order to study the influence of charging on the opera-tion of Jinsu UHVDC during the commissioning of UHVAC Suzhou station,in the RTDS Jinsu UHVDC and HuaiHuUHVAC equivalent power grid is built,actual control and protection device are built to form a closed loop simulationplatform with RTDS. Its performance remains highly consistent with actual UHVDC project in protection functions,behavior under fault of AC and DC and other aspects of characteristics. The operation of JinSu UHVDC near-zonetransformer and UHVAC transformer after air-charging are simulated and analyzed. The results show,transformernear JinSu UHVDC charging will lead to cyclical commutation failure and blocking,but the Suzhou UHVAC trans-former empty charge has no significant effect on the UHVDC operation basically. The conclusion is of great reference significance for the commissioning of HuaiHu UHVAC project.
引文
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[18]卫鹏,刘建坤,周前,等.基于RTDS特高压直流控保仿真平台的锦苏特高压直流建模及仿真[J].高压电器,2015,51(11):134-139.WEI Peng,LIU Jiankun,ZHOU Qian,et al. Modeling and simulation of UHVDC transmission system from jinping to sunan based on the RTDS simulation platform of UHVDC control and protection[J]. High Voltage Apparatus,2015,51(11):134-139.
[19]卫鹏,刘建坤,刘国平,等.应对区外来电比例提高的省内外电源协调运行机制[J].江苏电机工程,2016,35(2):11-15.WEI Peng,LIU Jiankun,LIU Guoping,et al. Operating mechanism of inter-province generation sources for coping with the increase of power from outside[J]. Jiangsu Electrical Engineering,2016,35(2):11-15.
[20]卫鹏,刘建坤,周前,等.大规模区外来电失去背景下电网响应机制的研究[J].江苏电机工程,2016,35(3):13-16.WEI Peng,LIU Jiankun,ZHOU Qian,et al. Analysis on the impact of synchronous condenser on DC inverter operating characteristic[J]. Jiangsu Electrical Engineering,2016,35(3):13-16.
[2]卫鹏,刘建坤,周前,等.一起复杂交流故障导致的锦苏直流换相失败的研究[J].高压电器,2016,51(5):96-100.WEI Peng,LIU Jiankun,ZHOU Qian,et al. Research on commutation failure of Jinsu DC transmission project caused by a complex AC fault[J]. High Voltage Apparatus,2016,51(5):96-100.
[3]卫鹏,刘建坤,周前,等.锦屏—苏州±800 kV特高压直流滤波器投切及无功控制策略研究[J].高压电器,2016,51(9):14-19.WEI Peng,LIU Jiankun,ZHOU Qian,et al. Research on filter switching and reactive control strategy of±800 kV Jinsu DC transmission project[J]. High Voltage Apparatus,2016,51(9):14-19.
[4]吴萍,林伟芳,孙华东,等.多馈入直流输电系统换相失败机制及特性[J].电网技术,2012,36(5):269-274.WU Ping,LIN Weifang,SUN Huadong,et al. Research and electromechanical transient simulation on mechanism of commutation failure in multi-infeed HVDC power transmission system[J]. Power System Technology,2012,36(5):269-274.
[5]卢睿,潘武略,李晓坷,等.多馈入直流对华东电网稳定性影响研究[J].华东电力,2005,33(11):3-8.LU Rui,PAN Wulüe,LI Xiaoke,et al. Impacts of multi-infeed HVDC on east China power grid stability[J]. East China Electric Power,2005,33(11):3-8.
[6]刘盛松,秦旭东,汪志成,等.计及潮流断面稳定限额的分区电网最大供电能力研究[J].江苏电机工程,2015,34(4):5-9.LIU Shengsong,QIN Xudong,WANG Zhicheng,et al. Study on total supply capability of zone grids considering interface flow limits[J]. Jiangsu Electrical Engineering,2015,34(4):5-9.
[7]高鹏,胡铭,蔡汉生,等.特高压直流输电系统实时闭环仿真建模[J].中国电力,2010,43(1):20-24.GAO Peng,HU Ming,CAI Hansheng,et al. Modeling studies on real-time closed-loop simulation of UHVDC transmission system[J]. Electric Power,2010,43(1):20-24.
[8]李响,刘国伟,冯亚东,等.新一代控制保护系统通用硬件平台设计与应用[J].电力系统自动化,2012,36(14):52-55.LI Xiang,LIU Guowei,FENG Yadong,et al. Design and application of general hardware platform for new generation control and protection system[J]. Automation of Electric Power Systems,2012,36(14):52-55.
[9]崔勇,郭强,黄志岭.特高压交直流电网实时仿真平台建设及应用[J].华东电力,2014,42(1):33-38.CUI Yong,GUO Qiang,HUANG Zhiling. The construction and application of real-time simulation platform for UHVDC and UHVAC power grid[J]. East China Electric Power,2014,42(1):33-38.
[10]张庆武,王永平,陈小军,等.特高压直流控制保护系统设计与开发[J].电力系统自动化,2013,37(21):88-93.ZHANG Qingwu,WANG Yongping,CHEN Xiaojun,et al.Design and development of control and protection system for UHVDC[J]. Automation of Electric Power Systems,2013,37(21):88-93.
[11]朱鑫要,汪惟源,汪成根,等.江苏特高压交直流输电交互影响研究[J].江苏电机工程,2016,35(2):39-42.ZHU Xinyao,WANG Weiyuan,WANG Chenggen,et al.Analysis of interaction between UHVAC and UHVDC for Jiangsu power grid[J]. Jiangsu Electrical Engineering,2016,35(2):39-42.
[12]李新年,李涛,吕鹏飞,等.向家坝至上海特高压直流输电工程换流器的投退策略分析[J].高电压技术,2011,37(5):1232-1238.LI Xinnian,LI Tao,LYU Pengfei,et al. Analysis on the strategy of converter entry/exit for xiangjiaba to Shanghai UHVDC project[J]. High Voltage Engineering,2011,37(5):1232-1238.
[13]卫鹏,刘建坤,周前,等.锦苏直流闭锁后重启动过程的故障反演[J].高压电器,2016,52(11):51-56.WEI Peng,LIU Jiankun,ZHOU Qian,et al. Fault inversion of Jin Su DC restart after blocking[J]. High Voltage Apparatus,2016,52(11):51-56.
[14]李新年,刘耀,朱艺颖,等.华北电网直流多馈入系统动态特性实时仿真[J].电网技术,2011,35(8):75-80.LI Xinnian,LIU Yao,ZHU Yiying,et al. Real-time simulation of dynamic performance of multi-infeed UHVDC transmission system to be connected to north China power grid before 2015[J]. Power System Technology,2011,35(8):75-80.
[15]陈倩,汤奕.江苏特高压建设时期短路电流限制措施[J].江苏电机工程,2015,34(5):21-24.CHEN Qian,TANG Yi. Research on the Jiangsu short-circuit current limiting strategy during UHV construction period[J]. Jiangsu Electrical Engineering,2015,34(5):21-24.
[16]李虎成,袁宇波,张小易,等.全球能源互联网下的受端大电网柔性控制策略探讨[J].江苏电机工程,2016,35(3):10-12.LI Hucheng,YUAN Yubo,ZHANG Xiaoyi,et al. The flexible control strategy study of receiving end large power grid under global energy connection[J]. Jiangsu Electrical Engineering,2016,35(3):10-12.
[17]徐强,谢天喜,吴珺,等.±800 k V锦苏直流工程全压启动故障仿真分析[J].江苏电机工程,2016,35(4):8-10.XU Qiang,XIE Tianxi,WU Jun,et al. Main electrical connection optimization of smart substation based on GIS equipment[J]. Jiangsu Electrical Engineering,2016,35(4):8-10.
[18]卫鹏,刘建坤,周前,等.基于RTDS特高压直流控保仿真平台的锦苏特高压直流建模及仿真[J].高压电器,2015,51(11):134-139.WEI Peng,LIU Jiankun,ZHOU Qian,et al. Modeling and simulation of UHVDC transmission system from jinping to sunan based on the RTDS simulation platform of UHVDC control and protection[J]. High Voltage Apparatus,2015,51(11):134-139.
[19]卫鹏,刘建坤,刘国平,等.应对区外来电比例提高的省内外电源协调运行机制[J].江苏电机工程,2016,35(2):11-15.WEI Peng,LIU Jiankun,LIU Guoping,et al. Operating mechanism of inter-province generation sources for coping with the increase of power from outside[J]. Jiangsu Electrical Engineering,2016,35(2):11-15.
[20]卫鹏,刘建坤,周前,等.大规模区外来电失去背景下电网响应机制的研究[J].江苏电机工程,2016,35(3):13-16.WEI Peng,LIU Jiankun,ZHOU Qian,et al. Analysis on the impact of synchronous condenser on DC inverter operating characteristic[J]. Jiangsu Electrical Engineering,2016,35(3):13-16.