配电网单向接地故障的测距 毕业论文.docxVIP

配电网单向接地故障的测距 摘要 摘要：配电网是电力电网系统的重要环节，配电网通过安全而稳定地运行，从而为用电设备提供可靠的电能。配电网的传输线路复杂，而且处在各种各样的环境中，由于其复杂性和多变性，发生电力故障是难免的事。在所有的故障中，单相接地短路故障是最容易发生的。电网故障发生后，在最短的时间内，对故障处进行精准测距和定位，尽可能隔离并排除故障，保证电网的持续正常运行是电力行业亟待解决的问题。但是，由于配电网所处环境等实在复杂，测距定位难度随之加大。当前，对单相接地故障的快速而准确的定位仍然是一个难题。 本文进行了配电网单相接地故障测距的研究和探讨。首先介绍了配电网的运行方式和运行原理，然后介绍了配电网单相接地故障产生的原因和危害，对目前存在的各种测距方法的准确性、可靠性进行了切实的研究和细致的分析，归纳整理了各种方法的优缺点，最后在Matlab/Simulink环境下利用SimPowerSystem模块搭建了配电网中性点不接地系统单相接地故障的仿真模型，通过仿真了解其危害，为实现准确故障测距定位，采用合理的排障措施提供思路，从而提高配电网的工作可靠性，为用电设备提供安全可靠的运行环境。 关键词：配电网，单相接地，测距，Simulink Abstract Distribution network is one of the important components of the power system , its security, stability , reliable operation is to protect the peoples power of life. However, the distribution network circuit complexity , changing environment , a variety of failures will inevitably occur , in which single-phase ground short-circuit fault is most likely to occur in a fault . When the grid fails, the shortest possible time , to the point of failure for accurate ranging and positioning, fault isolation within the minimum range, thus ensuring the continued normal operation of the power grid is essential workers can not shirk responsibility. However, the distribution network resulted in a complex environment of increasing difficulty locating fault location , the current situation, for fast and accurate positioning single-phase ground fault is still a full and perfect yet solved . This paper studied and discussed the distribution network of single-phase ground fault location . First introduced the principle of operation mode and operation of the distribution network , and then introduces the causes and distribution network harm resulting single-phase ground fault , the accuracy of various methods ranging existing reliability studies carried out effectively and detailed analysis, collate and analyze the advantages and disadvantages of each method , and finally in the Matlab / Simulink environment to build a distribution network single-phase ground