Key Technologies Research on Automatic Voltage Control in Liaoning Power Grid 220kV System

In order to better meet the requirements of automatic voltage control (AVC), integrating the Mvar control space and equivalent electrical distance, this paper improves the method of partitioning in the control strategy of automatic voltage control system. After analyzing the problems that exist in the traditional method, (such as one needs to artificially determine the number of partitions and a whole partition contains isolated bus only), a pre-partition-correction method based on constraint-based clustering is proposed. And then, applying the method into the 220kV system of Liaoning power grid, a desired result which meets the work requirements has been got.