Although the voltage reactive power automatic control（AVC）system used at present can meet the requirement of grid to voltage reactive power control

it is lack of the quantification evaluation to the adjustment effectiveness of the control strategy.In this paper

how to conduct efficiency analysis on the present reactive power equipment configuration status at Xiaoshan grid is performed by way of statistics and analysis of the operation data of regional grid automatic voltage control system in the past years and by the use of modified sensitivity and reactive power optimization algorithm.The reasonability of reactive power supply distribution can be evaluated which is developed based on the original reactive power control system and

at the same time

the efficiency analysis report of reactive compensation equipment configuration is obtained in accordance with existing grid structure and load level

which provides quantification reference to the reactive optimization configuration of grid and quantification base to AVC strategy optimization.