第３３卷第３期
电力科学与技术学报Vol .３３No .３２０１８年９月ＪＯＵＲＮＡＬＯＦＥＩＥＣＴＲＩＣＰＯＷＥＲＳＣＩＥＮＣＥＡＮＤＴＥＣＨＮＯＬＯＧＹSep .２０１８
一种新的静态电压稳定性评估指标
陈宝平１，林 涛１，黄 华１，吴赋章１，吴俊鹏２，张健南３
（１．武汉大学电气工程学院，湖北武汉４３００７２；２．郑州供电公司，河南郑州４５００００；３．驻马店供电公司，河南驻马店４６３０００）
摘 要：现有的电压稳定性指标多基于最小特征值距离复平面虚轴的远近来表征系统的电压稳定裕度，鲜有研究分析各模式之间的电压稳定差异特性，尤其是对系统电压失稳具有决定性影响的弱模式。根据已有文献所提出的电压稳定性指标，对其进行数学上的等值改造，重构出２个电压稳定性指标。在此基础上，着重研究系统的弱模式特性，提出两类新的电压稳定性指标，包括弱模式电压稳定裕度指标与弱模式电压稳定差异指标，分别从弱模式下稳定程度的平均状况与弱模式之间的稳定差异程度这２个方面对系统的电压稳定状况进行全面地评估。最后基于IEEE １０机３９节点标准系统进行仿真计算，仿真结果验证了该文所提两类电压稳定性指标的有效性与优越性。
关 键 词：电压稳定性；模态分析；弱模式；电压稳定裕度；电压稳定差异中图分类号：TM ７１２ 文献标志码：A 文章编号：１６７３-９１４０（２０１８）０３-００３７-０７
Ａｎｅｗｅｖａｌｕａｔｉｏｎｉｎｄｅｘｆｏｒｓｔａｔｉｃｖｏｌｔａｇｅｓｔａｂｉｌｉｔｙ
CHEN Bao -p ing １，LIN Tao １，HUANG Hua １，WU Fu -zhang １，WU Jun -p eng ２，ZHANG Jian -nan ３（１．School of Electrical Engineering ，Wuhan University ，Wuhan ４３００７２，China ；２．Zhengzhou Power Supply Company ，Zhengzhou ４５００００，China ；
３．Zhumadian Pow er Supply Company ，Zhumadian ４６３０００，China ）
Ａｂｓｔｒａｃｔ：The conventional voltage stability index characterizes the voltage stability margin of the system based on the distance of the minimum eigenvalue from the imaginary axis of the complex plane ．The characteristics of voltage sta -bility differences between modes are rarely studied and analyzed ，especially weak modes that have a decisive influence on system voltage instability ．Firstly ，based on the voltage stability index proposed in the existing literature ，two voltage stability indices are reconstructed via mathematical equivalent transformation ．On this basis ，the paper focuses on the characteristics of the weak mode of the system ，and proposes two new types of voltage stability indicators in -cluding voltage stability margin index and voltage stability difference index according to the concepts of mathematical statistics ．Then ，the voltage stability of the system is comprehensively evaluated from the two aspects of the average degree of stability in the weak mode and the degree of stability difference between the weak modes ．Finally ，an IEEE １０-machine ３９-node standard system is simulated to verify the validity and superiority of the proposed indices ．
Ｋｅｙｗｏｒｄｓ：voltage stability ；modal analysis ；weak modes ；voltage stability margin ；voltage stability difference
收稿日期：２０１７-０２-２３；修回日期：２０１７-０９-０７通信作者：陈宝平（１９９２-），男，硕士研究生，主要从事电力系统稳定与控制研究；E -mail ：３０９８７５９９７＠qq ．c om 随着电力系统的结构与电力调度日趋复杂，导
致了电力系统的稳定问题愈加严重。自上世纪７０
年代以来，多起电压崩溃事故频繁发生［１］。静态电
压稳定问题愈发值得关注。万方数据