基于"先无功-后有功"功率补偿的配电网电压协同控制策略OACSTPCD

The widespread development and integration of distributed photovoltaic power sources across the county,alongside the the large-scale grid connection of these distributed energy sources,play a crucial role in supporting two national strategies:achieving"carbon peaking and neut-rality"and"revitalizing rural areas".However,The misalignment between the peak and trough phases of distributed power generation and those of the load demand often leads to voltage fluctuations within the distribution system.Such fluctuations not only degrade the quality of power but also pose significant risks to system stability.To mitigate these issues,this study introduces a hierarchical voltage cooperative control strategy for distribution networks based on"reactive power first-active power later"power compensation.Initially,a hierarchical voltage cooperative control framework based on"reactive power first-active power later"power compensation was established.Subsequently,combining the equation of in-jected current and voltage at the nodes of multi-microgrid with power-voltage sensitivity analysis,a multi-intelligent cooperative regulation strategy based on"reactive power first-active power later"power compensation was proposed according to the voltage crossing degree of mul-tiple nodes.In this strategy,reactive power regulation was first performed via reactive power compensator,and then multi-microgrid was used for active power regulation when the voltage had not been effectively governed.Furthermore,in order to further satisfy the active power regulation requirements of each node,and to consider the internal source-load-storage operation cost and pollution emission of the grid,a multi-objective optimization-based distributed internal source-load-storage optimal coordinated power control strategy of the microgrid was proposed.Finally,three simulation scenarios were designed in MATLAB platform and IEEE test system model to validate the proposed control strategy.The results indicated that the proposed voltage cooperative control method facilitates comprehensive and efficient voltage regulation at each node,achieving this under economically optimal conditions.Additionally,the proposed microgrid's optimal coordinated power control strategy effectively en-sures that source-load-storage meets the microgrid's active power regulation requirements.This is accomplished in a timely and precise manner,adhering to both green and economic power supply principles.The effectiveness of the proposed control strategy is verified by the simulation results.