Kela PV station is the biggest photovoltaic power station in the southwest power grid,which forms a large-capacity hydro-photovoltaic complementary system with Murong hydropower station.Its low voltage ride-through(LVRT)characteristics have an impact on frequency and power angle stability of power grid.Firstly,the mechanism of LVRT of PV station affecting frequency stability of power grid is studied,as well as the power angle stability characteristics of hydro-photovoltaic complementary system.An engineering practical method for quantiatively evaluating the impact of LVRT of PV station on grid frequency is proposed.Then,the impacts of key performance indicators for LVRT of Kela PV station on frequency,power angle stability and transient voltage stability of southwest power grid are analyzed.Finally,an optimization scheme for key performance indicators for LVRT of PV station that takes into account the frequency and power angle stability of power grid is proposed,and the effectiveness of the proposed scheme is verified through simulation testing of Kela PV station.
hydro-photovoltaic complementary systemlow voltage ride-throughfrequency stabilitypower angle stabilityparameter optimization
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