支撑受端频率的水光互补新能源基地-多端柔直协同控制方法OA

In this paper,taking the multi-terminal direct current(MTDC)transmission system via sending-end dual-converter station of a hydro-photovoltaic complementary renewable energy base with as the object,studies the hydro-photovoltaic complementary large-scale generation base-MTDC cooperative control problem considering the receiving-end frequency support.This paper proposes the cooperative frequency support control method considering the cooperation of the sending-end dual converter station and reflecting the power transfer process of the large-scale generation base-MTDC system.Firstly,a mathematical dynamic model of the large-scale generation base-MTDC cooperative frequency control is established,and the frequency support architecture of the large-scale generation base-MTDC system is proposed.Subsequently,the frequency response model of the receiving-end grid considering the frequency support control of the large-scale generation base-MTDC system is established,which is then discretized by applying the forward difference method for embedding into the time-domain optimization model.Then,the parameter optimization method of the frequency support control is proposed considering the frequency stability demand of the receiving end,the regulating capability of the large-scale generation base-MTDC system,and the stability of the control.Finally,the necessity of the cooperative control of the dual converter stations at the sending end and the effectiveness of the proposed parameter optimization method are verified by PSCAD/EMTDC simulation.