Power distribution network reactive power optimization method and system considering influence of compensation capacity on position

The invention provides a power distribution network reactive power optimization method and system considering influence of the compensation capacity on the position. The method is characterized in that the number of reactive compensation points, the number of maximum compensation points and the maximum annual economic benefit value are initialized and set; compensation positions of compensation points meeting the set number of reactive compensation points are determined, calculating annual economic benefit after reactive compensation is carried out at the positions, if the annual economic benefit exceeds a set maximum annual economic benefit value at the moment, the maximum annual economic benefit value is updated; one is added to the number of the reactive compensation points, whether thenumber of the reactive compensation points at the moment is the optimal number of the reactive compensation points or not is determined, if yes, the optimal number and the capacity of the reactive compensation points at the