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| 交直流混联系统对距离保护暂态超越的影响及解决措施 | |
| 引用本文： | 索南加乐,张健康,刘林林,谈树峰,杨忠礼.交直流混联系统对距离保护暂态超越的影响及解决措施[J].西安交通大学学报,2010,44(4). |
| 作者姓名： | 索南加乐 张健康 刘林林 谈树峰 杨忠礼 |
| 作者单位： | 1. 西安交通大学电气工程学院,710049,西安 2. 西北电力调度通信中心,710048,西安 3. 河南省电力公司新乡供电公司,453002,河南新乡 |
| 摘 要： | 针对传统的距离保护应用于交直流混联系统,特别是当直流系统发生换相失败时存在暂态超越的问题,分析发现交直流混联系统直流侧发生换相失败时,故障暂态信号中含有大量衰减缓慢的低频分量、非周期分量及高频分量,这是引起距离保护暂态超越的根本原因.同时,给出一种先利用分布参数模型将保护安装处的电压、电流补偿至整定点,再采用R-L线路模型建立微分方程,识别出整定点与故障点之间距离的保护方案.动模数据仿真结果表明,该方案在特高压、长线路末端故障时能够有效地防止暂态超越,不受线路分布电容、低频分量以及非周期分量的影响,提高了长线距离保护的动作可靠性. |
| 关 键 词： | 交直流混联 距离保护 换相失败 暂态超越 |
Impact of AC-DC Compound Power System on Distance Protection Transient Overreach and Resolving Measures |
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| SUONAN Jiale,ZHANG Jiankang,LIU Linlin,TAN Shufeng,YANG Zhongli.Impact of AC-DC Compound Power System on Distance Protection Transient Overreach and Resolving Measures[J].Journal of Xi'an Jiaotong University,2010,44(4). | |
| Authors: | SUONAN Jiale ZHANG Jiankang LIU Linlin TAN Shufeng YANG Zhongli |
| Institution: | SUONAN Jiale1,ZHANG Jiankang2,LIU Linlin1,TAN Shufeng1,YANG Zhongli3(1.School of Electrical Engineering,Xi\'an Jiaotong University,Xi\'an 710049,China,2.Northwest China Power Dispatch &Communication Center,Xi\'an 710048,3.Xinxiang Electric Power Supply Corporation,Henan Electric Power Corporation,Xinxiang,Henan 453002,China) |
| Abstract: | The traditional distance protections applied to the AC-DC power system usually induce transient overreach,especially for the Inverter commutation failure in DC system. It is found that the transient overreach in AC-DC power system is due to fault transient signals containing a large number of low-frequency components of the slow decay and non-periodic components and high frequency components. The voltage and current of tuning point based on distributed-parameter model are calculated,and the equations for id... |
| Keywords: | AC-DC compound power system distance protection inverter commutation failure transient overreach |
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