Optimal Design Method for the Partitioning of OLTC-Inverter Control Parameters in Distribution Stations with High-proportion Residential Photovoltaics

The current trend of large-scale household PV access to low-voltage distribution network has become inevitable, however, the high penetration rate of household PV grid connection will cause serious voltage problems such as voltage crossing limits. Relying on the coordinated control of PV inverter and OLTC can effectively solve the above problems. In view of the current situation that the low-voltage distribution network lacks coordinated control of inverter and OLTC and the difficulty of solving the parameter optimization design of inverter, this paper proposes a PV zoning method and OLTC-inverter coordinated control strategy and parameter optimization design method. Firstly, the partitioning method of PV grid-connected inverters is proposed, then the OLTC-inverter coordination control strategy is proposed, and finally the control parameters are optimally designed.