A Frequency Limitation Controller Optimization Method for Power Grid with Multi-Region HVDC Considering Frequency Regulation Reserve

Different from single DC interconnection grid,considering the joint participation of multi-region HVDC in frequency stability control., there will be problems of control coefficient setting in frequency limitation controller (FLC) and power support allocation of multi-region HVDC. For this reason, this paper proposes a FLC optimization method for multi-region HVDC considering frequency regulation reserve, which can adaptively adjust control coefficients of FLC according to the frequency variation, and fully respond to frequency variation of disturbed region. On this basis, based on the proposed FLC optimization method, a coordinated control strategy for multi-region HVDC power allocation is proposed, which can adaptively allocate the DC modulation power in interconnection region according to the frequency variation of disturbed region as well as the frequency regulation reserve of other interconnection regions, so as to make the region with a large upper regulation reserve provide more frequency support power while guaranteeing the stability of interconnection regions.