一种基于功率转移系数的交直流混联受端电网切负荷方案配置方法
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摘要
针对交直流混联受端电网在直流发生闭锁故障后,会产生功率缺额,而潮流转移过程中可能造成交流通道过载,引发连锁故障的问题,提出了一种切负荷方案配置方法。通过分析直流系统及切负荷点与不同交流通道之间的功率转移系数,并综合考虑不同负荷的重要性对其进行修正,得到满足限制条件的优化切负荷方案。在浙江电网系统中进行了仿真验证,结果证明了所提方法的可行性和有效性。
In hybrid AC/DC receiving-end grid,power shortage and power transfer would occur after DC blocked faults,and it could cause chain faults.A load shedding scheme configuration method is proposed through analysis of power transfer coefficient of DC or load shedding buses and AC transmission lines,along with consideration of load importance factor.The simulation results for a hybrid AC/DC receiving-end grid in Zhejiang power grid proves feasibility and effectiveness of proposed method.
In hybrid AC/DC receiving-end grid,power shortage and power transfer would occur after DC blocked faults,and it could cause chain faults.A load shedding scheme configuration method is proposed through analysis of power transfer coefficient of DC or load shedding buses and AC transmission lines,along with consideration of load importance factor.The simulation results for a hybrid AC/DC receiving-end grid in Zhejiang power grid proves feasibility and effectiveness of proposed method.
引文
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[26]孙光辉,毕兆东,赵希才,等.电力系统在线安全稳定评估及决策技术的研究[J].电力系统自动化,2005,29(17):81-84.SUN Guanghui,BI Zhaodong,ZHAO Xicai,et al.Technology of online power system stability evaluation and decision-making[J].Automation of Electric Power Systems,2005,29(17):81-84.
[27]王刚,张伯明.电力系统外网在线动态等值方案[J].电网技术,2006,30(19):21-26.WANG Gang,ZHANG Boming.External online dynamic equivalents of power system[J].Power System Technology,2006,30(19):21-26.
[28]孙闻,房大中,薛振宇.电力系统在线暂态稳定分析方法[J].电网技术,2009,33(14):16-20.SUN Wen,FANG Dazhong,XUE Zhenyu.A method for on-line analysis of power system transient stability[J].Power System Technology,2009,33(14):16-20.
[29]孙树明,谢昶,吕颖,等.电力系统在线安全稳定分析应用模式[J].电网技术,2016,39(10):2875-2881.SUN Shuming,XIE Chang,LV Ying,et al.Power system online security and stability analysis application modes[J].Power System Technology,2016,39(10):2875-2881.
[30]中华人民共和国国务院.电力安全事故应急处置和调查处理条例[Z].2011-06-15.
[2]苏宏田,齐旭,吴云.我国特高压直流输电市场需求研究[J].电网技术,2005,29(24):1-4.SU Hongtian,QI Xu,WU Yun.Study on market demand of UHVDCpower transmission in China[J].Power System Technology,2005,29(24):1-4.
[3]齐旭,曾德文,史大军,等.特高压直流输电对系统安全稳定的影响研究[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.
[4]徐政.含多个直流换流站的电力系统中交直流相互作用特性综述[J].电网技术,1998,22(2):16-19.XU Zheng.AC/DC and DC/DC interactions of multiple HVDC links terminating in the same AC system[J].Power System Technology,1998,22(2):16-19.
[5]邵瑶,汤涌.多馈入交直流混合电力系统研究综述[J].电网技术,2009,33(17):24-30.SHAO Yao,TANG Yong.Research survey on multi-infeed AC/DChybrid power systems[J].Power System Technology,2009,33(17):24-30.
[6]徐政.交直流电力系统动态行为分析[M].北京:机械工业出版社,2004:1-13.
[7]郑超.直流逆变站电压稳定测度指标及紧急控制[J].中国电机工程学报,2015,35(2):344-352.ZHENG Chao.Voltage stability index of HVDC inverter station and emergency control strategy[J].Proceedings of the CSEE,2015,35(2):344-352.
[8]廖国栋,谢欣涛,侯益灵,等.±800 k V酒泉特高压入湘对湖南电网暂态电压稳定性的影响[J].电网技术,2012,36(2):23-28.LIAO Guodong,XIE Xintao,HOU Yiling,et al.Impacts of±800 k VDC power transmission from Jiuquan to Hunan on transient voltage stability of Hunan Power Grid[J].Power System Technology,2012,36(2):23-28.
[9]邱丽萍,陈向宜,马世英,等.直流调制对大型交直流互联电网安控的影响[J].电力系统及其自动化学报,2015,27(2):89-102.QIU Liping,CHEN Xiangyi,MA Shiying,et al.Impact of DCmodulation on safety and stability strategy in AC/DC hybrid system[J].Proceedings of the CSU-EPSA,2015,27(2):89-102.
[10]唐晓骏,程振龙,张鑫,等.交直流混联系统电压稳定在线评估体系[J].电网技术,2014,38(5):1175-1180.TANG Xiaojun,CHENG Zhenlong,ZHANG Xin,et al.An on-line voltage stability evaluation system for AC/DC hybrid power system[J].Power System Technology,2014,38(5):1175-1180.
[11]卢岑岑,王晓茹.直流有功功率调制对四川电网暂态稳定性的影响[J].电网技术,2012,36(11):140-146.LU Cencen,WANG Xiaoru.Influences of DC active power modulation on transient stability of Sichuan Power Grid[J].Power System Technology,2012,36(11):140-146.
[12]秦文萍,王鹏,韩肖清,等.电力系统有功和无功功率充裕度评估[J].电力系统自动化,2014,38(3):28-33.QIN Wenping,WANG Peng,HAN Xiaoqing,et al.Adequacy evaluation of active and reactive power in power system[J].Automation of Electric Power Systems,2014,38(3):28-33.
[13]覃琴,郭强,周勤勇,等.国网“十三五”规划电网面临的安全稳定问题及对策[J].中国电力,2015,48(1):25-32.QIN Qin,GUO Qiang,ZHOU Qinyong,et al.The security and stability of power grids in 13th Five-Year planning and countermeasures[J].Electric Power,2015,48(1):25-32.
[14]覃琴,周勤勇,郭强,等.保障系统安全稳定的电网构建应对策略研究[J].中国电力,2016,49(3):51-58.QIN Qin,ZHOU Qinyong,GUO Qiang,et al.Research on measures to ensure power system security and stability in power grid construction[J].Electric Power,2016,49(3):51-58.
[15]荆勇,杨晋柏,李柏青,等.直流调制改善交直流混联系统暂态稳定性的研究[J].电网技术,2004,28(10):1-4.JING Yong,YANG Jinbai,LI Baiqing,et al.Research on improving transient stability of AC/DC hybrid system by HVDC modulation[J].Power System Technology,2004,28(10):1-4.
[16]束洪春,董俊,孙士云,等.直流调制对南方电网交直流混联输电系统暂态稳定裕度的影响[J].电网技术,2006,30(20):29-33.SHU Hongchun,DONG Jun,SUN Shiyun,et al.Study on advancing transient stability margin in AC/DC hybrid transmission system of Southern China Power Grid by HVDC modulation[J].Power System Technology,2006,30(20):29-33.
[17]黄道春,魏远航,钟连宏,等.我国发展特高压直流输电中一些问题的探讨[J].电网技术,2007,31(8):6-12.HUANG Daochun,WEI Yuanhang,ZHONG Lianhong,et al.Discussion on several problems of developing UHVDC transmission in China[J].Power System Technology,2007,31(8):6-12.
[18]中国电力工程顾问集团公司.大容量直流输电对系统安全稳定影响分析[R].北京:中国电力工程顾问集团公司,2005.
[19]郑超,汤涌,马世英,等.网源稳态调压对暂态无功支撑能力的影响研究[J].中国电机工程学报,2014,34(1):115-122.ZHENG Chao,TANG Yong,MA Shiying,et al.Study on the influence of steady-state voltage regulation schemes on transient reactive power supporting capability[J].Proceedings of the CSEE,2014,34(1):115-122.
[20]朱玲,王晓茹,卢岑岑,等.基于BPA的大电网紧急直流功率支援策略研究[J].电力系统保护与控制,2013,41(23):139-144.ZHU Ling,WANG Xiaoru,LU Cencen,et al.Research of emergency DC power support strategies for large-scale power grid based on PSD-BPA[J].Power System Protection and Control,2013,41(23):139-144.
[21]屠竞哲,甘德强,辛焕海,等.考虑连锁故障风险的交直流混联系统容量最优分配[J].电网技术,2013,37(9):2492-2499.TU Jingzhe,GAN Deqiang,XIN Huanhai,et al.Optimal AC/DCcapacity allocation in AC/DC hybrid system considering risk of cascading failure[J].Power System Technology,2013,37(9):2492-2499.
[22]陈厚合,李莜婧,运奕竹.改善电力系统局部电压稳定指标精度的策略[J].电网技术,2014,38(1):723-730.CHEN Houhe,LI Youjing,YUN Yizhu.A strategy to improve accuracy of power system local voltage stability index[J].Power System Technology,2014,38(1):723-730.
[23]王莹,刘兵,刘天斌,等.特高压直流闭锁后省间紧急功率支援的协调优化调度策略[J].中国电机工程学报,2015,35(11):2695-2702.WANG Ying,LIU Bing,LIU Tianbin,et al.Coordinated optimal dispatching of emergency power support among provinces after UHVDC transmission system block fault[J].Proceedings of the CSEE,2015,35(11):2695-2702.
[24]郑超,汤涌,马世英,等.直流参与稳定控制的典型场景及技术需求[J].中国电机工程学报,2014,34(22):3750-3759.ZHENG Chao,TANG Yong,MA Shiying,et al.A survey on typical scenarios and technology needs for HVDC participated into stability control[J].Proceedings of the CSEE,2014,34(22):3750-3759.
[25]齐以涛,彭慧敏,杨莹,等.三华电网特高压交直流输电系统交互影响及控制策略[J].中国电力,2014,47(7):51-56.QI Yitao,PENG Huimin,YANG Ying,et al.Control strategies and interactions of UHVAC and UHVDC transmission systems in North China-Central China-East China Power Grid[J].Electric Power,2014,47(7):51-56.
[26]孙光辉,毕兆东,赵希才,等.电力系统在线安全稳定评估及决策技术的研究[J].电力系统自动化,2005,29(17):81-84.SUN Guanghui,BI Zhaodong,ZHAO Xicai,et al.Technology of online power system stability evaluation and decision-making[J].Automation of Electric Power Systems,2005,29(17):81-84.
[27]王刚,张伯明.电力系统外网在线动态等值方案[J].电网技术,2006,30(19):21-26.WANG Gang,ZHANG Boming.External online dynamic equivalents of power system[J].Power System Technology,2006,30(19):21-26.
[28]孙闻,房大中,薛振宇.电力系统在线暂态稳定分析方法[J].电网技术,2009,33(14):16-20.SUN Wen,FANG Dazhong,XUE Zhenyu.A method for on-line analysis of power system transient stability[J].Power System Technology,2009,33(14):16-20.
[29]孙树明,谢昶,吕颖,等.电力系统在线安全稳定分析应用模式[J].电网技术,2016,39(10):2875-2881.SUN Shuming,XIE Chang,LV Ying,et al.Power system online security and stability analysis application modes[J].Power System Technology,2016,39(10):2875-2881.
[30]中华人民共和国国务院.电力安全事故应急处置和调查处理条例[Z].2011-06-15.