| 可控配电网单相间歇电弧接地装置 |
| 点此下载全文 |
| 引用本文：李云阁1,权立1,刘健1,张小庆1,朱浩男2.可控配电网单相间歇电弧接地装置[J].电网与清洁能源,2021,37(7):1~7 |
| 摘要点击次数: 220 |
| 全文下载次数: 0 |
|
| 基金项目:国家自然科学基金项目（U1766208）；国家电网公司科技项目（5226SX14008Q）；国家发明专利（ZL201910186872.4） |
|
| 中文摘要:在中性点不接地或经消弧线圈接地的配电网中，发生单相接地故障时系统可继续运行一段时间，但应迅速查明故障线路和故障相，以免事故扩大。虽然，现有大量的不同原理的减小故障电流装置和故障选线选相装置，但通常仅在实验室或通过仿真验证其功能，功能验证不全面、场景不真实。介绍一种配电网单相间歇电弧接地装置的原理、结构和应用。利用晶闸管的导通和截止易于控制的优点，可自由控制电弧的产生和消失、放电频率、以及放电相位。该装置用于验证在10 kV实验室、试验场、或实际配电网中设备故障处理设备的能力，如消弧线圈和选线选相设备。利用该装置已成功进行上千次单相接地试验，试验不仅发现缺陷，而且指导解决缺陷。 |
| 中文关键词:配电网 间歇电弧 单相接地故障 单相接地装置 |
| |
| Controllable Single-Phase Intermittent-Arc Grounding Device Used on Distribution Systems |
|
|
| Abstract:When a single phase-to-ground fault occurs to a neutral isolated or a resonant grounded power distribution system， the system can maintain supplying power for a certain period of time but the faulty line and phase are expected to be identified as soon as possible to avoid worsening of the fault. Though many devices based on different principles claim to have excellent capabilities to decrease the fault current and make correct identification， only part of their functions have been confirmed in laboratories or by digital simulation rather than in real situations. This paper presents the principle， structure and practical application of an efficient， simple and controllable device which is able to make a phase conductor artificially grounded through an intermittent arc on a power distribution system. By taking the advantage that thyristors can be easily turned on and off， the proposed single-phase grounding device can control generation and extinguishing of arcs， discharge frequency and discharge phase with ease. The device is supposed to be used in 10 kV laboratories， test yards， or real distribution systems to verify the ability of fault processing facilities such as arc-suppression coils and faulty phase and circuit identification devices. Over one thousand grounding tests have been conducted using the device. Not only have these tests revealed defects， but also suggested clues to deal with them. |
| keywords:power distribution system intermittent arc single phase-to-ground fault single-phase grounding device |
| 查看全文 查看/发表评论 下载PDF阅读器 |
