摘要
为了研究高压电力传输过程中可能出现的故障,如雷击造成的短路故障、断路故障、发电中心的某个机组故障检修、超负载造成的运行问题,进行高压测量研究相当程度上存在着危险,借助模拟便成为研究的一种手段。在此用EMPT-RV仿真构建一个电力传输系统,其发电中心由三个带自动电压控制(AVC)功能的同步发电机组成。基于此发电中心模拟研究电力传输过程的网络补偿和保护功能,识别各种故障状态,如断路、单相、两相和三相短路故障,根据负载端输出的结果鉴别问题所在。在模拟过程中,便于计算、分析和比较,采用标准一元值(标幺值p.u.)。进一步研究表明,EMPT模拟电力传输系统具有良好的实用性。
In order to study the possible failures in the process of high-voltage power transmission,such as short-circuit faults caused by lightning strikes,open circuit faults,troubleshooting of a unit in the power generation center,and overload operation faults,it is undoubtedly dangerous by directly conduct with high-voltage measurement.Hereby we would use EMPT-RV simulation as a way for building a power transmission system.The power generation center consists of three synchronous generators with automatic voltage control(AVC).Based on this power generation center we study the network compensation and protection functions of the power transmission process,identify various fault conditions,such as open circuit,single-phase,two-phase and three-phase short-circuit faults,and identify the problem from the overload.In the simulation process,it is easy to calculate,analyze and compare by adopting the standard unitary value(p.u.).Further research shows that the EMPT for research of power transmission system has strong practicability.
出处
《电力系统装备》
2021年第3期79-82,共4页
Electric Power System Equipment
关键词
EMPT模拟
零坐标系
网络补偿
短路故障
氧化锌避雷针
EMPT simulation
zero coordinate system
network compensation
short circuit fault
ZnO lightning rod
