失步中心的定位方法及影响因素的研究  

Study on positioning method of out-of-step centre and its influence factors

作　　者：杨国杰[1] 张艳霞[1] 陶翔[1] 李莹[1] YANG Guo-jie ZHANG Yan-xia TAO Xiang LI Ying(Key Laboratory of Smart Grid of Ministry of Education, Tianjin University, Tianjin 300072, Chin)

机构地区：[1]天津大学智能电网教育部重点实验室,天津300072

出　　处：《天津理工大学学报》2017年第4期21-25,29,共6页Journal of Tianjin University of Technology

摘　　要：以两侧电势幅值不同、全系统阻抗角不相等的等值双机系统为例,基于母线处测量阻抗轨迹和全系统阻抗折线的数学解析式,提出了一种失步中心的定位方法.为了找到两侧系统运行方式变化、两侧系统电势幅值比变化和全系统阻抗角不相等对失步中心位置的影响规律,本文构造了位置函数.通过两侧系统电势幅值比与关键节点位置函数的比较,研究了两侧系统运行方式变化对失步中心位置的影响规律.通过分析结合仿真的方法研究了电力系统两侧电势幅值比变化以及全系统阻抗角不相等对失步中心位置的影响规律.所做工作有助于实时失步解列控制方案的设计和实现.Taking a two-terminal equivalent SYstem model with potential amplitude inequality and elements impedance phase angle irregularity as an example, this research presents a positioning method of out-of-step centre, based on mathematical analytical formula of the trajectory of measured impedance on the bus and the broken line of the whole power system impedance. To find the influence rules of operation mode changes of power systems, the potential amplitude＇s proportion changes of two-terminal power system and the inequality of the impedance phase angle of the whole system to the location of out-of-step centre,location function is constructed in this thesis. Through the comparison between the potential amplitude＇s proportion of two-terminal power system and the location function of key node, this thesis studies the influence rules of operation mode changes of power systems to the location of out-of-step centre. The influence rules of the potential amplitude＇s proportion changes of two-terminal power system and the inequality of the impedance phase angle of the whole system to the location of out-of-step centre are re-searched by analysis and simulation. All the work is beneficial to design and realize the scheme on the real-time control of out-of-step splitting.

关 键 词：失步振荡 失步中心定位 两侧系统运行方式变化 两侧系统电势幅值不等 全系统阻抗角不相等 

分 类 号：TM761[电气工程—电力系统及自动化]