特高压交直流电网系统保护及其关键技术
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摘要
中国特高压交直流电网发展过渡期,电网特性持续发生重大变化,传统的安全稳定防御技术和措施难以适应,亟须对电网安全防控体系进行提升。在梳理电网大的特性变化基础上,分析了适应特高压交直流电网实践的"系统保护"的必要性及需求。提出了系统保护的体系设计,包括设计思路、总体构成、具体措施等。提出了系统保护关键技术,并着重介绍了全景状态感知、实时决策与协同控制、精准负荷控制技术的需求及框架。最后,简述了国家电网在系统保护建设上的实施方案,为特高压交直流大电网安全稳定运行控制提供了解决方案。
During the development transition period of China's ultra-high voltage(UHV)power grid,the characteristics of power grid continue to change significantly.The traditional defense technologies and measures on security and stability are difficult to adapt,thus the security prevention and control system is needed to improve.The necessity and demand of"system protection"to adapt to construct UHV AC/DC power grid is put forward based on the characteristic-changes of power grid.The design of system protection is proposed,including design ideas,overall composition and specific measures.Then the key technologies of system protection are put forward,and the requirement and framework of panoramic state perception,real-time decision-making and coordinated control as well as precision load control technology are focused on.Finally,the implementation scheme of system protection construction for State Grid Corporation of China is briefly illustrated,which provides a solution for the safe and stable operation control of large-scale UHV AC/DC power grid.
During the development transition period of China's ultra-high voltage(UHV)power grid,the characteristics of power grid continue to change significantly.The traditional defense technologies and measures on security and stability are difficult to adapt,thus the security prevention and control system is needed to improve.The necessity and demand of"system protection"to adapt to construct UHV AC/DC power grid is put forward based on the characteristic-changes of power grid.The design of system protection is proposed,including design ideas,overall composition and specific measures.Then the key technologies of system protection are put forward,and the requirement and framework of panoramic state perception,real-time decision-making and coordinated control as well as precision load control technology are focused on.Finally,the implementation scheme of system protection construction for State Grid Corporation of China is briefly illustrated,which provides a solution for the safe and stable operation control of large-scale UHV AC/DC power grid.
引文
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[10]薛禹胜.时空协调的大停电防御框架:(一)从孤立防线到综合防御[J].电力系统自动化,2006,30(1):8-16.XUE Yusheng.Space-time cooperative framework for defending blackouts:PartⅠfrom isolated defense lines to coordinated defending[J].Automation of Electric Power Systems,2006,30(1):8-16.
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[12]方勇杰.用紧急控制降低由输电断面开断引发系统崩溃的风险---对印度大停电事故的思考[J].电力系统自动化,2013,37(4):1-6.FANG Yongjie.Application of emergency control to reduce risk of system collapse triggered by power transmission interface tripping:thinking on the India power blackouts[J].Automation of Electric Power Systems,2013,37(4):1-6.
[13]方勇杰.人工紧急调控与自动紧急控制协同防御[J].电力系统自动化,2012,36(22):6-11.FANG Yongjie.Coordinated prevention based on manual and automatic emergency control[J].Automation of Electric Power Systems,2012,36(22):6-11.
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[16]李柏青,刘道伟,秦晓辉,等.信息驱动的大电网全景安全防御概念及理论框架[J].中国电机工程学报,2016,36(21):5796-5805.LI Baiqing,LIU Daowei,QIN Xiaohui,et al.Concept and theory framework of panoramic security defense for bulk power system driven by information[J].Proceedings of the CSEE,2016,36(21):5796-5805.
[17]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.
[18]李鹏,吴小辰,张尧,等.南方电网多直流调制控制的交互影响与协调[J].电力系统自动化,2007,31(21):90-93.LI Peng,WU Xiaochen,ZHANG Yao,et al.Interaction and coordination of modulation controllers of multi-infeed HVDC in CSG[J].Automation of Electric Power Systems,2007,31(21):90-93.
[19]方勇杰,崔晓丹,王胜明,等.暂态稳定极限耦合的多个输电断面极限功率协调计算[J].电力系统自动化,2015,39(22):53-58.DOI:10.7500/AEPS20150205004.FANG Yongjie,CUI Xiaodan,WANG Shengming,et al.Coordinated limit power calculation of multi-sections with transient stability limit coupling[J].Automation of Electric Power Systems,2015,39(22):53-58.DOI:10.7500/AEPS20150205004.
[20]崔晓丹,张红丽,方勇杰,等.暂态功角弱稳定模式辨识及其协调紧急控制策略[J].电力系统自动化,2018,42(1):91-97.DOI:10.7500/AEPS20170512004.CUI Xiaodan,ZHANG Hongli,FANG Yongjie,et al.Weak stability mode identification of transient power angle and its emergency control strategy[J].Automation of Electric Power Systems,2018,42(1):91-97.DOI:10.7500/AEPS20170512004.
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