某光伏电站35 kV接地变兼站用变断路器跳闸处理及分析  

Handling and Analysis of Tripping of 35 kV Grounding Transformer and Station Transformer Circuit Breaker in a Photovoltaic Power Station

作　　者：蔡福禄 CAI Fulu(Huadian Yunnan Power Generation Co.,Ltd.,Lvshuihe Power Plant,Gejiu 661014,China)

机构地区：[1]华电云南发电有限公司绿水河发电厂,云南个旧661014

出　　处：《云南水力发电》2024年第6期62-64,共3页Yunnan Water Power

摘　　要：在电力系统中接地变兼站用变是一种常用的一次设备,接地变的主要作用是人为地制造一个中性点,以便于连接接地电阻。当系统发生接地故障时,它能够有效地对正序和负序电流呈现高阻抗,而对零序电流则呈现低阻抗,从而确保接地保护能够可靠地动作。接地变具有长时空载和短时过载的特点。它可能长时间处于空载状态,但在某些特定情况下,如系统故障时,它需要能够承受短时间的过载,以确保系统的稳定性和安全性。然而,在使用过程中,接地变兼站用变会出现各种故障,影响电力系统的正常运行。文章通过对光伏电站接地变兼站用变故障的处理和原因分析,提出了相应的解决办法,旨在为光伏电站接地变和站用变的维护和故障处理进行交流,提高现场设备运维水平。Grounding transformer and station transformer are commonly used primary equipment in the power system.The main function of a grounding transformer is to artificially create a neutral point for connecting the grounding resistance.When a grounding fault occurs in the system,it can effectively present high impedance to positive and negative sequence currents,while presenting low impedance to zero sequence currents,ensuring reliable operation of grounding protection.The grounding transformer has the characteristics of long time and short time overload.It may remain idle for a long time,but in certain specific situations,such as system failures,it needs to be able to withstand short-term overloads to ensure system stability and safety.However,during use,various faults may occur in the grounding transformer and station transformer,affecting the normal operation of the power system.This paper proposes corresponding solutions by analyzing the handling and causes of faults in grounding transformers and station transformers in photovoltaic power plants.The aim is to exchange information on the maintenance and fault handling of grounding transformers and station transformers in photovoltaic power plants,and improve the level of on-site equipment operation and maintenance.

关 键 词：接地变兼站用变 断路器跳闸 故障处理 原因分析 

分 类 号：TM561[电气工程—电器]