电压稳定在线监控的简化L指标及其灵敏度分析方法

JIANG Tao; LI Guoqing; JIA Hongjie; CHEN Houhe; MIAO Weiwei

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电压稳定在线监控的简化L指标及其灵敏度分析方法

更新时间：2025-08-13

- 电压稳定在线监控的简化L指标及其灵敏度分析方法
- Automation of Electric Power Systems Vol. 36, Issue 21, Pages: 13-18(2012)
- 作者机构：
  
  1. 智能电网教育部重点实验室，天津大学,天津市,300072
  2. 东北电力大学电气工程学院,吉林市,吉林省,132012
- 作者简介：
- 基金信息：
- DOI：
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- Published：2012
- 稿件说明：
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JIANG Tao, LI Guoqing, JIA Hongjie, et al. [J]. Automation of electric power systems, 2012, 36(21): 13-18.
DOI：

JIANG Tao, LI Guoqing, JIA Hongjie, et al. [J]. Automation of electric power systems, 2012, 36(21): 13-18. DOI：

摘要

提出了一种可应用于大规模电网电压稳定在线监测快速计算的简化 L指标及其L-Q灵敏度分析新方法。针对实际电网的特点，以局部电压稳定指标（L指标）为基础，推导出负荷节点简化L指标。在此基础上，给出了简化L指标的全微分方程，借助全微分方程分析系统参数变化对电压稳定的影响;定义了电力系统L-Q灵敏度，定量分析了网络中负荷节点间的电压稳定相互影响关系，研究了不同电压失稳模式所涉及的区域划分，并就L-Q的物理意义进行了全面分析;比较了L-Q灵敏度分析方法与V-Q灵敏度分析方法的异同，给出了L-Q灵敏度分析方法的具体计算步骤。最后，将所提出的方法应用于New England 39节点、IEEE 118节点和IEEE 300节点系统中，算例仿真结果证明了所述方法的可行性和有效性。

Abstract

A new simplified L -index and L-Q sensitivity analysis method is proposed to monitor and control the voltage stability in large scale power systems. A simplified formula of local voltage stability L-index is presented according to the characteristics of the actual power systems. For voltage stability assessment， the differential equation of the simplified L -index is developed to obtain the sensitivity of L with respect to parameters. Various sensitivity analysis can be performed， such as L-Q sensitivity， which could be used to identify and analyze the interaction between voltage stability and load-bus reactive power injection. The physical meaning of L-Q sensitivity is comprehensively presented， then compared with the V-Q sensitivity and the calculation steps of L-Q sensitivity analysis method is given. The New England 39-bus， IEEE 118-bus and IEEE 300-bus test cases are used to numerically validate the feasibility and validity of the proposed method.

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