基于网络能量的电力系统失步解列方案  

A method of power system out-of step separation based on network energy

作　　者：卢芳[1,2] 于继来[1] 

机构地区：[1]哈尔滨工业大学电气工程及自动化学院,黑龙江哈尔滨150001 [2]哈尔滨工程大学自动化学院,黑龙江哈尔滨150001

出　　处：《哈尔滨工程大学学报》2011年第6期780-785,共6页Journal of Harbin Engineering University

基　　金：国家自然科学基金资助项目(50877014;50477008);中央高校基本科研业务费创新团队培育计划专项资金资助项目(HEUCFT1005)

摘　　要：针对电力系统失步解列问题,从系统能量角度出发,探讨了系统解列策略中失步中心断面的识别、解列面的选取、解列时刻的确定几个关键问题.根据支路能量的大小即可确定异步振荡支路,进而确定失步中心断面;为使解列后子系统更易于恢复稳定,从系统动能与势能相互转换关系入手,确定系统解列面;根据解列后子系统积聚动能的大小分析了系统解列时刻.解列面和解列时刻的确定无需发电机的分群信息、不受网络结构和运行方式的限制,且有助于提高解列后子系统的稳定性,IEEE-68节点系统验证了该方法的正确性.Proper splitting strategies can appease the system swing to avoid breakdown.In this paper,several problems were discussed concerning system splits based on system energy,for example,identification of the fracture surface of the out-of step center,selection of splitting interface,determination of splitting time,etc.The asynchronous oscillating branch can be determined based on the branch energy,after which the out-of-step interface can be captured;to make the subsystems after splitting more apt to recover stability,the splitting interface was researched based on the relationship of dynamic energy and potential energy;the system splitting time was analyzed according to the accumulating kinetic energy of subsystems after splitting.The determination of splitting interface and splitting time does not need generators grouping information,and is not restricted by network structure and running mode;besides,it is beneficial to stability of subsystems after splitting.The method was tested by the IEEE-68 node system.

关 键 词：电力系统 支路能量 解列 失步中心 

分 类 号：TM712[电气工程—电力系统及自动化]