电源"空心化"电网的协调二级电压控制优化方法OA

In large hub city power grids,load centers often lack flexible and continuously adjustable reactive power sources across multiple voltage levels,leading to a"hollowing-out"of power supply.This paper proposes a coordinated two-level voltage control optimization method tailored for such"hollowed-out"power grids.In this method,the high-voltage busbar of all controllable power plants within a region are generalized as voltage-dominant nodes,and regional voltage regulation is achieved by minimizing the sum of squared deviations between the busbar voltages and their reference values.Meanwhile,the coordination relationships among upper-level and lower-level regions are explicitly distinguished,and threshold-based control objectives between hierarchical regions are introduced to improve the reactive power support capability of lower-level areas.The effectiveness of the proposed method for regional reactive voltage control in hollowed-out power networks is verified through simulations using a standard test system combined with actual grid data from China.