The Security Correction Strategy in AC and DC Hybrid Power System
Bi Ruyu1, Lin Tao1, Chen Rusi1, Xu Xialing2, Ye Jing1
1.School of Electrical Engineering Wuhan University Wuhan 430072 China 2.Central China Electric Power Dispatching and Communication Centre Wuhan 430077 China
Abstract：With the rapid development of AC-DC hybrid power system,the risk of cascading failures caused by DC block or line tripping is also increasing.Relevant control measures should be taken to avoid further overload according to the operation status of power grid.In smart grid,HVDC and thyristor controlled series capacitor (TCSC) can also be taken as control measures to further reduce the amount of load shedding.The sensitivity and optimization based methods are often utilized to formulate the security correction strategies.The sensitivity based method functions well in online generation rescheduling and load shedding.However,the power flow sensitivities of DC power and TCSC reactance are discovered to vary according to control variable rather than being constant.So it’s difficult for the sensitivity based method to be applied to security correction strategy of AC/DC hybrid power system.A modified optimization method,which uses heuristic search principle,is proposed against the defects of excessive optimization variables and heavy computational burden,which results in the limitation for online application.Based on load shift factor(LSF),few generator and load nodes are rapidly selected to control overload effectively.Aiming at the minimum amount of load shedding,an optimization model is proposed,in which HVDC power and reactance of TCSC,in addition to the power of the selected nodes are taken as optimization variables.Intelligent optimization algorithm is adopted to obtain security correction scheme.Based on modified IEEE 30-node benchmark,the validity and superiority of the proposed method is verified by comparing the result obtained by the proposed method with those without utility of heuristic search or without taking DC power and TCSC reactance into consideration.
毕如玉, 林涛, 陈汝斯, 徐遐龄, 叶婧. 交直流混合电力系统的安全校正策略[J]. 电工技术学报, 2016, 31(9): 50-57.
Bi Ruyu, Lin Tao, Chen Rusi, Xu Xialing, Ye Jing. The Security Correction Strategy in AC and DC Hybrid Power System. Transactions of China Electrotechnical Society, 2016, 31(9): 50-57.
[1] Edris A.Facts technology development:an update[J].IEEE Power Engineering Review,2000,20(3):4-9. [2] 王英英,罗毅,涂光瑜,等.电力系统连锁故障的关联模型[J].电工技术学报,2012,27(2):204-209. Wang Yingying,Luo Yi,Tu Guangyu,et al.Correlation model of cascading failures in power system[J].Transactions of China Electrotechnical Society,2012,27(2):204-209. [3] Lai Y C,Motter A E,Nishikawa T.Attacks and cascades in complex networks[R].Lecture Notes in Physics,2004,650:299-310. [4] 王增平,李刚,任建文.基于前K最短路径的输电断面搜索新算法[J].电工技术学报,2012,27(4):193-201. Wang Zengping,Li Gang,Ren Jianwen.A new search algorithm for transmission section based on K shortest paths[J].Transactions of China Electrotechnical Society,2012,27(4):193-201. [5] Latora V,Marchiori M.Vulnerability and protection of infrastructure networks[J].Physical Review E,2005,71(1):015103. [6] 苗峰显,白雪峰,郭志忠.支路潮流越限控制的虚拟支路法[J].电力系统自动化,2009,33(14):32-36,65. Miao Fengxian,Bai Xuefeng,Guo Zhizhong.A virtual branch method for branch power flow off-limit analysis[J].Automation of Electric Power Systems,2009,33(14):32-36,65. [7] 贾宏杰,穆云飞,余晓丹.基于直流潮流灵敏度的断面潮流定向控制[J].电力系统自动化,2010,34(2):34-38. Jia Hongjie,Mu Yunfei,Yu Xiaodan.Directional control method to interface power based on DC power flow and sensitivity[J].Automation of Electric Power Systems,2010,34(2):34-38. [8] Wang Pengxiang,Liu Wenying,Liu Zhengyi,et al.Application of machine learning methods in active power security correction of power system[C]//International Conference on Electrical and Control Engineering,Wuhan,2010:476-479. [9] 李海涛,孙闻,赵兵,等.基于交流灵敏度的在线安全控制策略[J].电力系统及其自动化学报,2012,24(1):32-36. Li Haitao,Sun Wen,Zhao Bing,et al.Online security control analysis based on sensitivity method[J].Proceedings of the CSU-EPSA,2012,24(1):32-36. [10]FerreirA C M M,Pinto J A D,Barbosa F P M.Transient stability assessment of an electric power system using trajectory sensitivity analysis[C]//Proceedings of 39th International Universities Power Engineering Conference,Bristol,2004,2:1091-1095. [11]Zarat L A L,Castro C A.Fast computation of security margins to voltage collapse based on sensitivity analysis[J].IEE Proceedings:Generation,Transmission and Distribution,2006,153(1):35-43. [12]沈晓东,刘俊勇,刘彦.基于节点不平衡功率的粒子群潮流转移控制算法[J].电力系统自动化,2012,36(7):1-5,70. Shen Xiaodong,Liu Junyong,Liu Yan.A power flow transferring control algorithm based on node lopsided powers using particle swarm optimization[J].Automation of Electric Power Systems,2012,36(7):1-5,70. [13]姜臻,苗世洪,刘沛,等.一种基于粒子群优化算法的转移潮流控制策略[J].电力系统自动化,2010,34(18):16-20,31. Jiang Zhen,Miao Shihong,Liu Pei,et al.A particle swarm optimization based power flow transferring control strategy[J].Automation of Electric Power Systems,2010,34(18):16-20,31. [14]黄柳强,郭剑波,卜广全,等.FACTS协调控制研究进展及展望[J].电力系统保护与控制,2012,40(5):138-147. Huang Liuqiang,Guo Jianbo,Bu Guangquan,et al.Research progress and prospect of FACTS coordinated control[J].Power System Protection and Control,2012,40(5):138-147. [15]陈曦.基于灵敏度方法的电网安全校正策略研究[D].保定:华北电力大学,2011. [16]顾乃炎,侯志俭.几种快速确定发电机分配系数的方法[J].电网技术,1999,23(6):40-43. Gu Naiyan,Hou Zhijian.Fast determination methods of generator distribution factors[J].Power System Technology,1999,23(6):40-43. [17]李立,鲁宗相,周双喜.典型FACTS设备对连锁故障风险影响研究[J].电力系统保护与控制,2012,40(3):1-7. Li Li,Lu Zongxiang,Zhou Shuangxi.Research on the effect of typical FACTS devices on cascading failure risk[J].Power System Protection and Control,2012,40(3):1-7. [18]赖敏榕.电网静态安全有功校正策略研究[D].北京:华北电力大学,2007. [19]吴杰康,李月华,张宏亮,等.负荷转移因子及其在网损计算中的应用[J].现代电力,2008,25(3):8-12. Wu Jiekang,Li Yuehua,Zhang Hongliang,et al.Calculation and application of load shift factor of power systems[J].Modern Electric Power,2008,25(3):8-12. [20]陈志强,刘钊,张建辉.聚类分析中PAM算法的分析与实现[J].计算机与现代化,2003,9(9):1-3,6. Chen Zhiqiang,Liu Zhao,Zhang Jianhui.Analysis and implementation of PAM algorithm[J].Computer and Modernization,2003,9(9):1-3,6. [21]王开军,李晓.基于有效性指标的聚类算法选择[J].四川师范大学学报(自然科学版),2011,34(6):915-918. Wang Kaijun,Li Xiao.Selection of clustering algorithms based on a validity index[J].Journal of Sichuan Normal University(Natural Science),2011,34(6):915-918. [22]李爽,王志新,王国强.海上风电柔性直流输电变流器P-DPC控制研究[J].电工技术学报,2013,28(2):264-270. Li Shuang,Wang Zhixin,Wang Guoqiang.Predictive direct power control strategy for offshore wind power VSC-HVDC converter[J].Transactions of China Electrotechnical Society,2013,28(2):264-270. [23]刘宪林,陈楠,苏向敬,等.电力系统柔性潮流[J].电力自动化设备,2009,29(5):1-3,34. Liu Xianlin,Chen Nan,Su Xiangjing,et al.Flexible power flow[J].Electric Power Automation Equipment,2009,29(5):1-3,34. [24]杭乃善,周航,李如琦.稳态控制潮流的设定空载频率及空载电压算法[J].中国电机工程学报,2003,23(12):77-81. Hang Naishan,Zhou Hang,Li Ruqi.Algorithm of setting open-circuit frequency and voltage for steady-state control power flow[J].Proceedings of the CSEE,2003,23(12):77-81. [25]王淳,程浩忠.基于模拟植物生长算法的配电网重构[J].中国电机工程学报,2007,27(19):50-55. Wang Chun,Cheng Haozhong.Reconfiguration of distribution network based on plant growth simulation algorithm[J].Proceedings of the CSEE,2007,27(19):50-55. [26]胡汉梅,郑红,李劲.基于模拟植物生长算法的配电网继电保护整定优化的研究[J].电力系统保护与控制,2012,40(7):19-24. Hu Hanmei,Zheng Hong,Li Jin.Research on the optimal coordination of the distributed networks relay protection based on the plant growth simulation algorithm[J].Power System Protection and Control,2012,40(7):19-24. [27]张健南,林涛,余光正,等.大规模电力系统阻尼控制器协调优化方法[J].电网技术,2014,9(9):2466-2472. Zhang Jiannan,Lin Tao,Yu Guangzheng,et al.Coordinated optimization of damping controllers in large-scale power system[J].Power System Technology,2014,9(9):2466-2472. [28]陈曦.基于风险理论的电力系统静态安全性评估方法研究[D].武汉:华中科技大学,2012. [29]谢春瑰,方菲,吕项羽,等.电网脆弱性评估方法研究[J].电网与清洁能源,2013,29(5):35-38. Xie Chungui,Fang Fei,Lü Xiangyu,et al.Research on power grid vulnerability assessment methods[J].Power System and Clean Energy,2013,29(5):35-38.
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