摘要
以解列后系统稳定性为目标选取最优的解列断面是主动解列的核心问题,但随着新能源、直流输电的快速发展,目前普遍将其抽象为单目标优化过程的研究方法,难以满足当前大电网对解列后子系统频率及电压支撑能力的要求。为此提出了考虑多因素的主动解列断面搜索方法。首先,基于单目标优化过程得到具有最小潮流冲击的初始解列断面;其次,在初始解的邻域搜索空间中获取具有相近潮流冲击的可行解集;最后,考虑风电渗透率或直流多馈入短路比确定最终的解列断面。所提策略能有效提高解列后孤岛的稳定运行能力、有利于后续控制和恢复,其有效性通过新英格兰10机39节点系统得到了仿真验证。
Determining the optimal surface considering the stability of power system after splitting is the core problem of controlled islanding.However,the problem is seen as a single objective optimization process according to current research methods,which is not able to guarantee the stability required by current power systems due to the development of renewable energy and high voltage direct current(HVDC).Therefore,a controlled islanding strategy considering multiple factors is proposed in this paper.Firstly,initial islanding surface with minimum power-flow disruption is obtained based on single-objective optimization.Secondly,candidate islanding strategies with similar power-flow disruption are searched in neighborhood search space of the initial surface.Finally,the final splitting surface considering wind penetration and multiinfeed short circuit ratio is determined.The strategy verified by the simulation in New England 39-bus system can effectively improve the stable operation ability of islands after splitting,which is beneficial to subsequent control and recovery.
作者
汤奕
郑晨一
肖晋宇
侯金鸣
TANG Yi;ZHENG Chenyi;XIAO Jinyu;HOU Jinming(School of Electrical Engineering,Southeast University,Nanjing 210096,Jiangsu Province,China;Global Energy Interconnection Development and Cooperation Organization,Xicheng District,Beijing 100031,China)
出处
《全球能源互联网》
2019年第4期393-400,共8页
Journal of Global Energy Interconnection
基金
国家重点研发计划(2018YFB0904500)
国家自然科学基金(51577030)
国家电网公司科技项目(电力电子化大电网控制形态研究,GEIGC-E-[2018]026)~~
关键词
电力系统
解列策略
风电
直流输电
power systems
islanding strategy
wind power
DC transmission
