| 500 kV电网短路电流超标机理及限制措施适应性 |
| |
| 引用本文： | 孙奇珍,蔡泽祥,李爱民,李力,吴科成.500 kV电网短路电流超标机理及限制措施适应性[J].电力系统自动化,2009,33(21):92-96. |
| |
| 作者姓名： | 孙奇珍 蔡泽祥 李爱民 李力 吴科成 |
| |
| 作者单位： | 1. 华南理工大学电力学院,广东省广州市,510640
2. 广东省电力调度中心,广东省广州市,510600 |
| |
| 摘 要： | 提出一种利用短路点自阻抗分析500 kV电网短路电流超标机理的方法,并应用于短路电流限制措施的适应性研究.基于二端口网络理论,构建双端电源等值电路,从短路点自阻抗各组成要素的物理意义角度分析不同位置、不同类型短路电流的主要影响因素,揭示其超标机理.500 kV侧短路电流主要取决于500 kV侧电网结构,因此其限制措施主要是改变500 kV侧电网参数;220 kV侧短路电流受变压器等值阻抗和220 kV电网结构的影响,但不同站点受二者影响程度不同,应根据不同影响程度采取相应的措施以增大变压器等值阻抗或改变220 kV侧电网参数.应用于广东500 kV电网短路电流分析和限制措施的研究结果证明了其正确性和实用性.
|
| 关 键 词： | 短路电流超标 短路电流限制措施 自阻抗 双端等值电路 |
| 收稿时间： | 5/25/2009 9:32:38 PM |
| 修稿时间： | 2009/10/22 0:00:00 |
A Short-circuit Current Over-limited Mechanism of 500 kV Power System and the Adaptability of Limiting Measures |
| |
| SUN Qizhen,CAI Zexiang,LI Aimin,LI Li,WU Kecheng.A Short-circuit Current Over-limited Mechanism of 500 kV Power System and the Adaptability of Limiting Measures[J].Automation of Electric Power Systems,2009,33(21):92-96. |
| |
| Authors: | SUN Qizhen CAI Zexiang LI Aimin LI Li WU Kecheng |
| |
| Affiliation: | SUN Qizhen1,CAI Zexiang1,LI Aimin1,LI Li2,WU Kecheng2(1.South China University of Technology,Guangzhou 510640,China,2.Guangdong Power Dispatching Center,Guangzhou 510600,China) |
| |
| Abstract: | A method is proposed to analyze the short-circuit current over-limited mechanism for 500 kV power systems using the self-impedance at the short-circuit point.The method can be applied to assess the adaptability of short-circuit current limiting measures.Based on two-port network theory,an equivalent circuit with only two nodes is formed,using which the main influencing factors in short-circuit currents of different locations and fault types from the physical meaning of self-impedance composition at the shor... |
| |
| Keywords: | short-circuit current over-limitation short-circuit current limiting measure self-impedance equivalent circuit with two nodes |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《电力系统自动化》浏览原始摘要信息 |
|
点击此处可从《电力系统自动化》下载全文 |
|
