基于直流闭锁事故的华东电网频率特性及控制措施
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摘要
随着区外直流馈入规模不断增加,华东受端电网频率稳定支撑特性逐渐下降。针对2016年华东电网两起实际直流闭锁事故,开展受端电网频率稳定特性仿真,通过调节全网发电机一次调频特性,再现特高压直流闭锁后系统频率响应过程。在此基础上,开展汛期低谷方式下华东最大单回及两回直流闭锁后频率稳定仿真。仿真结果表明,当前电网一次调频能力不足,直流闭锁后存在低频减载动作风险。针对上述问题,华东电网已经开展频率紧急协调控制系统建设工作,通过系统仿真进一步验证相关控制措施的有效性。相关研究方法和结论已应用于华东电网频率仿真分析和事故预案制订,以提高直流闭锁后的风险抵御能力。
Growing DC feed-in scale outside East China has caused gradual decrease of frequency stability supporting characteristic in East China power grid.In allusion to two cases of DC block accidents in East China in2016,this paper aims to develop simulation on frequency stability characteristics of receiving power grids.By adjusting primary frequency modulation characteristics of generators,it reappears frequency response process of the system after UHVDC block.Then,it carries out simulation on frequency stability after DC block of the maximum single circuit and double circuit under low-load operation mode.Simulation results indicate the primary frequency modulation abilities of current power grids are insufficient which may cause low-frequency load shedding risks after DC block.Thus,East China power grid has developed construction of frequency emergency coordination and control system and by system simulation,corresponding control measures are proved to be effective.Relevant research methods and conclusions have been used for simulating analysis on East China frequency and formulating accident plans so as to improve risk defense ability after DC block.
Growing DC feed-in scale outside East China has caused gradual decrease of frequency stability supporting characteristic in East China power grid.In allusion to two cases of DC block accidents in East China in2016,this paper aims to develop simulation on frequency stability characteristics of receiving power grids.By adjusting primary frequency modulation characteristics of generators,it reappears frequency response process of the system after UHVDC block.Then,it carries out simulation on frequency stability after DC block of the maximum single circuit and double circuit under low-load operation mode.Simulation results indicate the primary frequency modulation abilities of current power grids are insufficient which may cause low-frequency load shedding risks after DC block.Thus,East China power grid has developed construction of frequency emergency coordination and control system and by system simulation,corresponding control measures are proved to be effective.Relevant research methods and conclusions have been used for simulating analysis on East China frequency and formulating accident plans so as to improve risk defense ability after DC block.
引文
[1]张恒旭,庄侃沁,祝瑞金,等.大受端电网频率稳定性研究[J].华东电力,2009,37(10):1644-1649.ZHANG Henxu,ZHUANG Kanqin,ZHU Ruijin,et al.Frequency stability assessment for large receiving-end power systems[J].East China Electric Power,2009,37(10):1644-1649.
[2]齐旭,曾德文,史大军,等.特高压直流输电对系统安全稳定影响研究[J].电网技术,2006,30(2):1-6.QI Xu,ZENG Dewen,SHI Dajun,et al.Study on impacts of UHVDC transmission on power system stability[J].Power System Technology,2006,30(2):1-6.
[3]高强,张小聪,施正钗,等.±800 kV宾金直流双极闭锁故障对浙江电网的影响[J].电网与清洁能源,2014,30(11):47-51.GAO Qiang,ZHANG Xiaocong,SHI Zhengchai,et al.Impact of±800 kV Yibin-Jinhua DC bipolar block fault on Zhejiang power grid[J].Advances of Power System&Hydroelectric Engineering,2014,30(11):47-51.
[4]卢志明,何春光.基于AHP的供电企业安全管理评价研究[J].浙江电力,2016,35(6):61-65.LU Zhiming,HE Chunguang.Research on safety management assessment of power supply enterprise based on AHP[J].Zhejiang Electric Power,2016,35(6):61-65.
[5]李明节.大规模特高压交直流混联电网特性分析与运行控制[J].电网技术,2016,40(4):985-991.LI Mingjie.Characteristic analysis and operational control of large-scale hybrid UHV AC/DC power grids[J].Power System Technology,2016,40(4):985-991.
[6]凌卫家,孙维真,叶琳,等.浙江交直流混联受端电网静态稳定分析[J].电力系统保护与控制,2016,44(15):164-170.LIN Weijia,SUN Weizhen,YE Lin,et al.Static stability analysis of Zhejiang hybrid ultra-high voltage AC/DC receiving power grid[J].Power System Protection and Control,2016,44(15):164-170.
[7]屠竞哲,张健,吴萍,等.多送出直流系统送端故障引发稳定破坏机理分析[J].电力系统自动化,2015,39(20):146-151.TU Jinzhe,ZHANG Jian,WU Pin,et al.Mechanism analysis on instability caused by sending-side contingencies of multiple HVDC sending systems[J].Automation of Electric Power Systems,2015,39(20):146-151.
[8]杨建明,徐斌,王杨正,等.一次特殊的高压直流输电线路故障分析及线路保护优化[J].电力工程技术,2017,36(5):136-142.YANG Jianming,XU Bin,WANG Yangzheng,et al.Analysis of an HVDC transmission line fault and line protection optimization[J].Electric Power Engineering Technology,2017,36(5):136-142.
[9]庄侃沁,武寒,黄志龙,等.龙政直流双极闭锁事故华东电网频率特性分析[J].电力系统自动化,2006,30(22):101-104.ZHUANG Kanqin,WU Han,HUANG Zhilong,et al.Analysis of frequency characteristics in East China due to LongZheng DC bipolar block fault[J].Automation of Electric Power System,2006,30(22):101-104.
[10]李国栋,皮俊波,郑力,等.±500 kV林枫直流双极闭锁故障案例仿真分析[J].电网技术,2014,30(4):877-881.LI Guodong,PI Junbo,ZHENG Li,et al.Simulation analysis on case of bipolar blocking in±500 kV EHVDC power transmission line from Tuanlin to Fengjing[J].Power System Technology,2014,30(4):877-881.
[11]华文,黄晓明,楼伯良,等.宾金直流单极闭锁事故再现仿真分析[J].浙江电力,2016,35(2):7-10.HUA Wen,HUANG Xiaoming,LOU Boliang,et al.Reconstruction and simulation analysis of unipolar block in Yibin-Jinhua UHVDC power transmission project[J].Zhejiang Electric Power,2016,35(2):7-10.
[12]李兆伟,吴雪莲,庄侃沁,等.“9·19”锦苏直流双极闭锁事故华东电网频率特性分析及思考[J].电力系统自动化,2017,41(7):149-155.LI Zhaowei,WU Xuelian,ZHUANG Kanqin,et al.Analysis and reflection on frequency characteristics of East China grid after bipolar locking of“9.19”Jinping-Sunan DC transmission line[J].Automation of Electric Power System,2017,41(7):149-155.
[13]许伟杰,袁旭峰,朱红梅.多种电源模式下有功功率调整及频率控制技术研究[J].贵州电力技术,2015,18(6):43-47.XU Weijie,YUAN Xufeng,ZHU Hongmei.Research on the active adjustment and frequency control technology in multiple power modes[J].Guizhou Electric Power Technology,2015,18(6):43-47.
[14]国家电网公司华东分部.华东电网运行备用调度管理规定[Z].上海:国家电网公司华东分部,2015.
[15]国家电网公司华东分部.2016年华东电网四省一市按频率减负荷分配方案[Z].上海:国家电网公司华东分部,2015.
[16]许涛,励刚,于钊,等.多直流馈入受端电网频率紧急协调控制系统设计与应用[J].电力系统自动化,2017,41(8):98-104.XU Tao,LI Gang,YU Zhao,et al.Design and application of emergency coordination control system for multi-infeed HVDC receiving-end system coping with frequency stability problem[J].Automation of Electric Power System,2017,41(8):98-104.
[2]齐旭,曾德文,史大军,等.特高压直流输电对系统安全稳定影响研究[J].电网技术,2006,30(2):1-6.QI Xu,ZENG Dewen,SHI Dajun,et al.Study on impacts of UHVDC transmission on power system stability[J].Power System Technology,2006,30(2):1-6.
[3]高强,张小聪,施正钗,等.±800 kV宾金直流双极闭锁故障对浙江电网的影响[J].电网与清洁能源,2014,30(11):47-51.GAO Qiang,ZHANG Xiaocong,SHI Zhengchai,et al.Impact of±800 kV Yibin-Jinhua DC bipolar block fault on Zhejiang power grid[J].Advances of Power System&Hydroelectric Engineering,2014,30(11):47-51.
[4]卢志明,何春光.基于AHP的供电企业安全管理评价研究[J].浙江电力,2016,35(6):61-65.LU Zhiming,HE Chunguang.Research on safety management assessment of power supply enterprise based on AHP[J].Zhejiang Electric Power,2016,35(6):61-65.
[5]李明节.大规模特高压交直流混联电网特性分析与运行控制[J].电网技术,2016,40(4):985-991.LI Mingjie.Characteristic analysis and operational control of large-scale hybrid UHV AC/DC power grids[J].Power System Technology,2016,40(4):985-991.
[6]凌卫家,孙维真,叶琳,等.浙江交直流混联受端电网静态稳定分析[J].电力系统保护与控制,2016,44(15):164-170.LIN Weijia,SUN Weizhen,YE Lin,et al.Static stability analysis of Zhejiang hybrid ultra-high voltage AC/DC receiving power grid[J].Power System Protection and Control,2016,44(15):164-170.
[7]屠竞哲,张健,吴萍,等.多送出直流系统送端故障引发稳定破坏机理分析[J].电力系统自动化,2015,39(20):146-151.TU Jinzhe,ZHANG Jian,WU Pin,et al.Mechanism analysis on instability caused by sending-side contingencies of multiple HVDC sending systems[J].Automation of Electric Power Systems,2015,39(20):146-151.
[8]杨建明,徐斌,王杨正,等.一次特殊的高压直流输电线路故障分析及线路保护优化[J].电力工程技术,2017,36(5):136-142.YANG Jianming,XU Bin,WANG Yangzheng,et al.Analysis of an HVDC transmission line fault and line protection optimization[J].Electric Power Engineering Technology,2017,36(5):136-142.
[9]庄侃沁,武寒,黄志龙,等.龙政直流双极闭锁事故华东电网频率特性分析[J].电力系统自动化,2006,30(22):101-104.ZHUANG Kanqin,WU Han,HUANG Zhilong,et al.Analysis of frequency characteristics in East China due to LongZheng DC bipolar block fault[J].Automation of Electric Power System,2006,30(22):101-104.
[10]李国栋,皮俊波,郑力,等.±500 kV林枫直流双极闭锁故障案例仿真分析[J].电网技术,2014,30(4):877-881.LI Guodong,PI Junbo,ZHENG Li,et al.Simulation analysis on case of bipolar blocking in±500 kV EHVDC power transmission line from Tuanlin to Fengjing[J].Power System Technology,2014,30(4):877-881.
[11]华文,黄晓明,楼伯良,等.宾金直流单极闭锁事故再现仿真分析[J].浙江电力,2016,35(2):7-10.HUA Wen,HUANG Xiaoming,LOU Boliang,et al.Reconstruction and simulation analysis of unipolar block in Yibin-Jinhua UHVDC power transmission project[J].Zhejiang Electric Power,2016,35(2):7-10.
[12]李兆伟,吴雪莲,庄侃沁,等.“9·19”锦苏直流双极闭锁事故华东电网频率特性分析及思考[J].电力系统自动化,2017,41(7):149-155.LI Zhaowei,WU Xuelian,ZHUANG Kanqin,et al.Analysis and reflection on frequency characteristics of East China grid after bipolar locking of“9.19”Jinping-Sunan DC transmission line[J].Automation of Electric Power System,2017,41(7):149-155.
[13]许伟杰,袁旭峰,朱红梅.多种电源模式下有功功率调整及频率控制技术研究[J].贵州电力技术,2015,18(6):43-47.XU Weijie,YUAN Xufeng,ZHU Hongmei.Research on the active adjustment and frequency control technology in multiple power modes[J].Guizhou Electric Power Technology,2015,18(6):43-47.
[14]国家电网公司华东分部.华东电网运行备用调度管理规定[Z].上海:国家电网公司华东分部,2015.
[15]国家电网公司华东分部.2016年华东电网四省一市按频率减负荷分配方案[Z].上海:国家电网公司华东分部,2015.
[16]许涛,励刚,于钊,等.多直流馈入受端电网频率紧急协调控制系统设计与应用[J].电力系统自动化,2017,41(8):98-104.XU Tao,LI Gang,YU Zhao,et al.Design and application of emergency coordination control system for multi-infeed HVDC receiving-end system coping with frequency stability problem[J].Automation of Electric Power System,2017,41(8):98-104.