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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 被引量:39

Simplified L-index and Its Sensitivity Analysis Method for On-line Monitoring of Voltage Stability Control
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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。 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.
出处 《电力系统自动化》 EI CSCD 北大核心 2012年第21期13-18,共6页 Automation of Electric Power Systems
基金 国家自然科学基金资助项目(50977009) 国家重点基础研究发展计划(973计划)资助项目(2009CB219701,2010CB234608) 高等学校博士学科点专项科研基金资助项目(20090032110064) 天津市科技发展计划资助项目(09JCZDJC25000) 国家电网公司大电网重大专项资助项目(SGCC-MPLG028-2012)~~
关键词 电压稳定性 局部电压稳定指标 简化L指标 L-Q灵敏度 voltage stability local voltage stability index simplified L-index L-Q sensitivity
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参考文献17

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