浅谈柔性直流电网主动限流开断直流故障

申娟平

[摘    要]在进行柔性直流电网故障诊断和综合控制时，通常会在其中应用主动限流模式，并利用主动限流模式对柔性直流电网故障问题进行有效控制，及时开断直流故障部位，为维持柔性直流电网稳定性和综合运行效果奠定基础。同时对柔性直流电网主动限流开断直流故障展开研究，保证柔性直流电网主动限流开断直流故障的力度和各项故障综合控制效果，这对于维持柔性直流电网整体运行效果显得至关重要。

[关键词]柔性直流电网;主动限流;开断;直流故障

[中图分类号]TM721.1 [文献标志码]A [文章编号]2095–6487（2021）01–00–02

Talking about Active Current Limiting and Breaking DC Fault of Flexible DC Grid

Shen Juan-ping

[Abstract]In the fault diagnosis and comprehensive control of flexible DC grid， active current limiting mode is usually applied， and the active current limiting mode is used to effectively control the fault of flexible DC grid， and the DC fault location is disconnected in time to maintain flexibility. The stability and comprehensive operation effect of the DC grid lay the foundation. At the same time， research on the active current limiting and interrupting of DC faults in the flexible DC grid is carried out to ensure the strength of the active current limiting and interrupting of DC faults in the flexible DC grid and the comprehensive control effect of various faults， which is crucial to maintaining the overall operation effect of the flexible DC grid.

[Keywords]flexible DC grid; active current limiting; breaking; DC fault

對于柔性直流电网来说，其在长时间运行过程中可能受到一些阻碍，造成柔性直流电网故障问题频发，相应电网综合运行效果和电流传输效果也有很大影响。基于此，必须在考虑各项要求条件下处理柔性直流电网直流故障，强化主动限流控制模式在其中应用力度，借此降低柔性直流电网运行难度和出现各类故障问题的可能性，更好保证柔性直流电网良性运行效果。

1 柔性直流电网的概述

柔性直流电网是指采取柔性直流输电技术的电网。为保证该类电网运行效果和整体安全性，就应在考虑各项基础要求条件下维持柔性直流输电技术，以此强化电网电压换流器、自动断器件和脉宽调制装置运行效果和现实作用，从而维护柔性直流电网运行状态，将柔性直流电网运行出现各类故障问题的可能。当然应用柔性直流电网可以实现无源网络供电和换相问题控制等目标，方便电力部门借助柔性直流电网构成高质量多馈直流系统，维持电网运行效果和安全水平。……