光伏电源对IEEE 34节点测试馈线过电流保护的影响

以IEEE 34节点测试馈线为研究对象,加入重合器和熔断器等过电流保护设备,在特定位置接入不同容量的光伏电源,利用PSCAD软件进行仿真,就短路电流和保护之间的协调性,研究光伏电源对过电流保护设备的影响.为此进行了多种故障仿真,以验证接入光伏电源后,电网的保护设备之间的协调性是否改变.仿真结果表明:并不是电网中的所有位置接入光伏电源,都会对保护产生影响,只有在特定位置接入光伏电源时,才会使某些保护失去选择性,导致其误动或拒动.

Impact of Photovoltaic Power on IEEE 34 Bus Test Feeder with Over-Current Protection

The study, taking the IEEE 54 bus test feeder as the subject, adding the recloser and the fuse overcurrent protection devices, applying different capacities of Photovohaic power at specific locations, and using PSCAD software to simulate the short circuit current and protective coordination, studies the impact of the Photovoltaic power on the equipment of over-current protection. For this purpose, stimulation of a variety of faults is conducted to verify whether the coordination between power grid protective devices changes after accessing the photovoltaic power. The simulation results indicate that the protection is not affected at every photovohaic power accessing location; only at some specific ones, however, some protection selectivity is lost, causing the protection device to real-operate or miss trip.