With the development of power systems,a large number of shunt capacitors are used to improve power quality in the distribution network.The shunt capacitor banks are operated much frequently,as a result,the capacitor b...With the development of power systems,a large number of shunt capacitors are used to improve power quality in the distribution network.The shunt capacitor banks are operated much frequently,as a result,the capacitor banks will bear large numbers of over-voltage inevitably.If the over-voltage exceeds certain amplitude,the capacitor will be damaged.This paper aims at the capacitor banks in the 35 kV side of Shanghai Xu-xing 500 kV substation,and applies ATP-EMTP to simulate the over-voltages generated by operating the switches under different angles of the source.Finally,according to the results of simulation and theoretical analysis,a best choice(i.e.angles of the source) to switch on capacitor banks is proposed.In this case the over-voltage on the capacitor will be limited to lowest.展开更多
基于光伏模块直流物理模型,在PSCAD仿真环境下,开发了光伏阵列仿真模型。此外,考虑到太阳能的波动性和随机性对光伏阵列的影响,开发了最大功率点跟踪(Maximum Power Point Tracking,MPPT)控制器仿真模型,保证光伏阵列在任何当前日照下...基于光伏模块直流物理模型,在PSCAD仿真环境下,开发了光伏阵列仿真模型。此外,考虑到太阳能的波动性和随机性对光伏阵列的影响,开发了最大功率点跟踪(Maximum Power Point Tracking,MPPT)控制器仿真模型,保证光伏阵列在任何当前日照下不断获得最大功率输出。仿真结果表明,搭建的仿真模型能够准确的反映实际物理装置的特性与功能,可以用于光伏发电并网及储能方面的仿真研究。展开更多
利用PSCAD电磁暂态仿真软件,对典型500 k V变电站和输电线路建模,计算出了潜供电流和恢复电压。该模型对500 k V系统有效熄弧提供了重要参数,为重合闸设备的重合时间设置和相关的继电保护定值整定,提供了切实可行的依据。对500 k V输变...利用PSCAD电磁暂态仿真软件,对典型500 k V变电站和输电线路建模,计算出了潜供电流和恢复电压。该模型对500 k V系统有效熄弧提供了重要参数,为重合闸设备的重合时间设置和相关的继电保护定值整定,提供了切实可行的依据。对500 k V输变电工程的调试、启动和运行具有一定的指导意义。展开更多
基金supported of the Fundamental Research Founds for the Central Universities
文摘With the development of power systems,a large number of shunt capacitors are used to improve power quality in the distribution network.The shunt capacitor banks are operated much frequently,as a result,the capacitor banks will bear large numbers of over-voltage inevitably.If the over-voltage exceeds certain amplitude,the capacitor will be damaged.This paper aims at the capacitor banks in the 35 kV side of Shanghai Xu-xing 500 kV substation,and applies ATP-EMTP to simulate the over-voltages generated by operating the switches under different angles of the source.Finally,according to the results of simulation and theoretical analysis,a best choice(i.e.angles of the source) to switch on capacitor banks is proposed.In this case the over-voltage on the capacitor will be limited to lowest.
文摘基于光伏模块直流物理模型,在PSCAD仿真环境下,开发了光伏阵列仿真模型。此外,考虑到太阳能的波动性和随机性对光伏阵列的影响,开发了最大功率点跟踪(Maximum Power Point Tracking,MPPT)控制器仿真模型,保证光伏阵列在任何当前日照下不断获得最大功率输出。仿真结果表明,搭建的仿真模型能够准确的反映实际物理装置的特性与功能,可以用于光伏发电并网及储能方面的仿真研究。
