方向行波波形积分式快速母线保护

发布时间：2018-05-02 17:15

本文选题：方向行波 + 波形积分　；参考：《中国电机工程学报》2014年31期

【摘要】：为提高母线保护的动作速度,根据行波传输理论,提出一种行波波形积分式快速母线保护方法。当母线故障时,在所有出线上检测到的初始行波均来自于线路的背后,是正向行波;而某条出线发生故障时,在所有非故障线路上检测到的初始行波是正向行波,而故障线路上检测到的初始行波是反向行波。在故障后特定时间内对各条出线上的方向行波进行积分运算,根据正反向行波积分值的比值大小识别故障方向。综合分析所有出线的故障方向,可识别母线是否发生故障。利用PSCAD/EMTDC构建了500 k V母线模型,仿真结果表明:所提方法鲁棒性强、动作快速、可靠性高,其性能基本不受故障电阻、故障初始角、开关操作等的影响,有望应用于实际的电力工程中。
[Abstract]:In order to improve the speed of busbar protection, a fast bus protection method based on the theory of traveling wave transmission is proposed. When the bus fails, the initial traveling waves detected on all the outlines come from the back of the line and are positive traveling waves, and when a fault occurs at a certain line, the initial traveling waves detected on all non-fault lines are positive traveling waves. The initial traveling wave detected on the fault line is the reverse traveling wave. The directional traveling wave on each outline is integrated at a specific time after the fault, and the fault direction is identified according to the ratio of the positive and negative traveling wave integral value. Comprehensive analysis of all the fault direction of the line, can identify whether the bus fault. A 500kV bus model is constructed by using PSCAD/EMTDC. The simulation results show that the proposed method is robust, fast and reliable, and its performance is not affected by fault resistance, fault initial angle, switching operation, etc. It is expected to be used in practical power engineering.
【作者单位】：电网智能化调度与控制教育部重点实验室(山东大学);山东省电力公司威海供电公司;
【基金】：国家自然科学基金项目(51277114,51177094) 山东省优秀中青年科研奖励基金(BS2010DX014)~~
【分类号】：TM773

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