Stable Operation Capability Evaluation for Renewable Energy Station with Grid-forming Power Sources
The short-circuit ratio(SCR)of renewable energy stations does not take into account the voltage support of the grid-forming power sources,and the critical short-circuit ratio(CSCR)also ignores the power-angle stability constraints,which makes it impossible for them to accurately evaluate the stable operation capability of renewable energy stations in the weak grid.Facing these problems,first,under the constraints of voltage stability and power-angle stability,the SCR and CSCR indicators of grid-following stations are calculated.By comparing the SCR and the CSCR,the stable operation capability of grid-following stations can be evaluated.On this basis,the changes in CSCR quantifies the changes of the stable operation capability of grid-following stations after the grid-forming power source accesses.Thus,the role of grid-forming power source in enhancing the stable operation capability is verified.Finally,through simulation cases of a single grid-following power source,grid-following and grid-forming power sources connected to grid-connected systems,the effectiveness of the proposed stable operation capability evaluation method is verified.
grid-following stationgrid-forming power sourcecritical short-circuit ratio(CSCR)voltage stabilitypower-angle stabilityoperation capability evaluation
万方数据
维普
