引用本文: | 张忠会,胡一波,朱文涛.模态分析技术在系统薄弱环节分析中的应用[J].电力系统保护与控制,2014,42(15):58-64.[点击复制] |
ZHANG Zhong-hui,HU Yi-bo,ZHU Wen-tao.Modal analysis technology in the application of the weak parts of systems[J].Power System Protection and Control,2014,42(15):58-64[点击复制] |
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摘要: |
在传统的Q-V模态分析法基础上,考虑了节点有功微增量变化对模态分析结果的影响,利用修正后的降阶雅可比矩阵特征值对某一运行方式下的系统电压静态稳定性进行判别。并对该系统状态进行薄弱环节分析,且在潮流方程中增加PV节点的无功微增量,使得运用模态分析法计算节点参与因子时可以得到发电机节点对电压崩溃的参与程度,弥补了使用传统Q-V模态分析法只能计算PQ节点参与因子的不足。结合非序贯的蒙特卡洛模拟法对系统状态进行随机抽样,计算出系统电压崩溃的概率风险。针对IEEE-RTS 79系统算例做了应用研究,验证了将改进后的模态分析技术运用到系统电压崩溃风险薄弱环节分析中的有效性。 |
关键词: 模态分析法 薄弱环节 电压崩溃 风险评价 |
DOI:10.7667/j.issn.1674-3415.2014.15.010 |
投稿时间:2013-10-22修订日期:2013-12-23 |
基金项目: |
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Modal analysis technology in the application of the weak parts of systems |
ZHANG Zhong-hui,HU Yi-bo,ZHU Wen-tao |
(Information Engineering College of Nanchang University, Nanchang 330031, China;Jiangxi Ganxi Power Supply Company, Xinyu 338000, China) |
Abstract: |
Based on the traditional Q-V modal analysis method and considering the influence that a node’s active micro increment changes to the results of modal analysis, this paper uses the amended reduced order of Jacobian matrix to identify the system static voltage stability, adds PV nodes of reactive power of micro increment in the power flow equations to analyze the weak link in the system state of sampling, gets the involvement of voltage collapse of the generator nodes when modal analysis method is used to calculate node participation factor, which makes up for the deficiency that the traditional Q-V mode only calculates PQ node participation factor. The non-sequential Monte Carlo simulation method is combined to proceed random sampling of the state of the system and calculate the probability of the voltage collapse. IEEE-RTS 79 system is analyzed to prove the availability in the analysis of the weak link of the risk of voltage collapse using improved modal analysis technology. |
Key words: modal analysis method weak link voltage collapse risk assessment |