| 配电网故障保护与自愈控制 |
| 添加时间：2022/6/24 14:28:23 浏览次数： |
| 配电网故障保护与自愈控制一直是学术交流的热点话题，小电流接地故障选线作为故障保护的第一环节，一直以来都备受关注。选择什么故障量作为分析对象和选择什么分析方法进行故障选线，是该领域面临的主要问题。 Fault protection and self-healing control of distribution network has always been a hot topic in academic exchanges. As the first link of fault protection, the fault line selection of small current grounding has always been concerned. It is the main problem in this field to choose which fault quantity to analyze and which analysis method to select. 配电网中，大部分馈线都会被安装有电流互感器，但电压互感器却不会大范围配置，因此基于功率方向及电压电流相位差的判据便无法使用。由此可见，开发基于电流信息的保护方案适用范围更广。目前配电网单相接地故障选线主要是对各馈线的零序电流进行分析比较，提取零序电流的暂态和稳态特征，例如比幅法、比相法、能量法等。 In the distribution network, most feeders will be installed with current transformers, but the voltage transformers will not be widely configured, so the criterion based on power direction and voltage current phase difference cannot be used. It can be seen that the development of protection scheme based on current information is more applicable. At present, single-phase to ground fault line selection of distribution network is mainly to analyze and compare the zero sequence current of each feeder, extract the transient and steady-state characteristics of zero sequence current, such as amplitude comparison method, phase comparison method, energy method, etc. 这些方法普遍存在的问题是：零序电流的抗接地过渡电阻能力差；受系统三相不平衡影响，系统中性点接地方式会严重影响到零序电流的幅值。 The common problems of these methods are: the ability of anti grounding transition resistance of zero sequence current is poor; affected by the three-phase imbalance of the system, the neutral grounding mode of the system will seriously affect the amplitude of zero sequence current |
| 上一页 小电流选线 |
| 下一页 加装零序电压互感器 |
Copyright © 技术支持：遨游网络