新能源电站小电流接地系统故障分析与仿真

Analysis and Simulation of Small Current Grounding System Fault in New Energy Power Station

电力系统中无法阻止故障发生。由于小电流接地系统在我国新能源电站的使用较为普遍,因此分析新能源电站的小电流接地系统发生故障后的现象非常有必要。运用MATLAB/Simulink仿真软件中的SimPowerSystems电力系统库,在接地变压器经小电阻接地方式发生单相接地故障时搭建仿真模型图,并仿真这种接地方式发生的单相接地故障。通过观察仿真波形图,总结该系统发生故障时的现象,使工作人员可以及时发现故障并进行处理,从而保证电力系统供电的可靠性。

The power system can not prevent the occurrence of faults.Because the small current grounding system is widely used in new energy power stations in China,therefore,it is very necessary to analyze the phenomenon after the failure of the small current grounding system in the new energy power station.In this paper,the SimPowerSystems power system library in MATLAB/Simulink is used to simulate the single-phase-to-ground fault of the grounded transformer,the simulation of single-phase-to-ground fault is carried out.By observing the simulation wave chart,the phenomenon of the system failure is summarized,so that the staff can find and deal with the failure in time to ensure the reliability of power supply system.