首页|Harmonic Oscillations in a Grid-connected PV Generation Farm Caused by an Increased Number of Parallel-connected PV Generating Units and Damping Controllers
Harmonic Oscillations in a Grid-connected PV Generation Farm Caused by an Increased Number of Parallel-connected PV Generating Units and Damping Controllers
扫码查看
点击上方二维码区域，可以放大扫码查看
原文链接
维普
万方数据
This paper examines the harmonic oscillations in a grid-connected PV generation farm(PVGF)caused by the parallel connection of an increased number of PV generation units(PVGUs).An equivalent model of the grid-connected PVGF is derived,which clearly explains why there are internal and ex-ternal oscillation modes in the grid-connected PVGF.An indicator of impedance multiplication(IIM)is proposed to quantitatively estimate the impact of the increased number of PVGUs in parallel connection.The analysis in this paper reveals the mechanism about why the damping of external oscillation modes may decrease when more PVGUs are in parallel connection under the condition that the IIM is positive.An example grid-connected PVGF is presented in this paper to demonstrate and evaluate the derived analysis and conclusions.A method for designing the damping controllers to ensure a negative IIM is proposed.With the damping controllers being installed,the risk of growing harmonic oscillations caused by the increased number of the PVGUs in parallel connection can be effectively eliminated.
Damping controllerequivalent modelHarmonic oscillationsPV generation farmPV generation units
Wenjuan Du、Zhicheng Ma、Yang Wang、H.F.Wang
展开 >
School of Electrical Engineering,Sichuan University,Chengdu 610065,China
Electric Power Research Institute,State Grid Gansu Electric Power Co.,Ltd.,Lanzhou 730000,China
维普
万方数据
