基于稳定影响度指标的电压稳定脆弱点分析  

Analysis of Voltage Fragility Area Based on the Stability Influence Index

作　　者：胡臻[1] 李欣然[1] 刘光晔[1] 宋军英[2] 

机构地区：[1]湖南大学电气与信息工程学院,长沙410082 [2]国网湖南省电力公司,长沙410007

出　　处：《电工技术学报》2017年第7期150-157,共8页Transactions of China Electrotechnical Society

基　　金：国家重点基础研究发展计划(973计划)(2012CB215100);国家自然科学基金(51277056);国家电网公司科技项目(5216A013500P)资助

摘　　要：为判断电力系统在给定运行方式下,当前网络结构中的电压稳定脆弱区域,基于非解析电力系统动态分析理论,提出考虑动态阻抗矩阵变化的稳定影响度(SI)指标及其分析方法。所提出的节点SI指标和电网SI指标不仅可以反映节点电压和电网电压受扰动冲击的大小,而且能量化分析各区域之间的电气耦合关系及其主导因素,体现了电网各区域之间复杂的电气耦合关系,证明了电网电压冲击最大的区域就是当前运行方式下电网结构中的电压稳定脆弱区域。通过IEEE 39节点系统和华中某省电网实际运行系统仿真结果说明了分析方法的有效性和正确性。Under given operation modes of power systems,to ascertain the fragility area of voltage stability in the network structure,a stability influence（ SI） index considering the dynamic impedance matrix and the corresponding analytical method,is put forward in this paper,based on the dynamic analysis theory of nonanalytical. The proposed nodal point SI index and power network SI index can not only reflect the degree of disturbance impacts on node voltage and network voltage,but also be used to quantitatively analyze the electric coupling relationships and its dominant factors between different areas in the network. This index indicating the complex electric coupling relationships between areas,and proving that the area whose network voltage impacts most is the fragility area of voltage stability in the network structure under the current operation mode. Finally,simulation results of the IEEE 39 node system and an actual power system verify the effectiveness and correctness of the proposed analytical method.

关 键 词：电力系统 动态分析 脆弱区域 电压稳定 复杂网络 

分 类 号：TM71[电气工程—电力系统及自动化]