高压直流输电系统中性线过电压分析

发布时间：2018-01-18 16:11

本文关键词：高压直流输电系统中性线过电压分析　出处：《电力电子技术》2015年12期 　论文类型：期刊论文

【摘要】：直流输电系统在运行过程中时常会遭受由雷击、操作、故障等各种原因引起的过电压,这部分过电压对于直流输电系统输送过程中的各直流设备绝缘及耐压水平提出了相当高的要求。尤其是直流换流站双极中性区域的设备,由于其在正常运行过程中无需耐受高电压,故设计的绝缘与耐压能力相对较低。然而一旦中性线区域的直流设备遭受较高冲击过电压时,中性区域设备将无法承受太大的过电压,从而造成设备绝缘击穿、损毁,引发直流系统闭锁,这将会给直流输电系统安全稳定运行带来严重危害。这里通过分析高压直流输电系统中性线产生过电压原因,同时结合目前在运高压直流输电工程中设备的设计特点,提出相应改进措施。
[Abstract]:HVDC system will often suffer from the lightning operation, during operation, the fault overvoltage caused by various reasons, this part of overvoltage is a very high requirement for the DC transmission equipment of DC transmission system in the process of insulation and pressure level. Especially the neutral zone bipolar DC converter station equipment, because of its normal in the process of running without high voltage, so the design of the insulation and pressure capacity is relatively low. However, once the DC equipment neutral line area suffered a high voltage surge, neutral zone equipment will not be able to withstand voltage is too large, resulting in equipment damage caused by insulation breakdown, DC system lock, it will bring serious harm to the safe and stable operation of HVDC transmission system. This paper analyses the neutral line overvoltage of HVDC transmission system, combined with the current in HVDC The design features of the equipment in the transmission project and the corresponding improvement measures are put forward.

【作者单位】：上海交通大学自动化系;国网上海市电力公司检修公司;
【分类号】：TM721.1
【正文快照】： l引言电力系统过电压是危害电力系统安全运行的主要因素之-。_魏输电搶-样,栜触系统也会遭受由于雷击、操作、故障或其他原因而〃生的各种波形的过电压。对于直流输电系统的w极线路而言,均己装设有过电压保护装置进行㈣制,从而}直流输电系岕备在麟榞及故障后的安全然而对于

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