Research on coordinated control strategy of multi terminal flexible DC power grid based on hill climbing search method

Abstract

Multi-point DC voltage control is commonly used in the multi-terminal flexible DC transmission system where the system power often changes. Therefore, the performance of system power regulation and distribution becomes an important index to ensure the normal operation of the system. In this paper, a wind power flexible load system grid-connected technology based on multi-terminal DC power transmission and mountain climbing servo was proposed, which has made some achievements in improving the grid-connected technology of wind power flexible load system. Taking asynchronous motor as an example, the algorithm structure of grid-connected system was provided, the hardware component model structure of system control under the condition of soft grid-connected was given, and then the grid-connected process of wind power flexible power load system was optimized by the mountain climbing servo. Through establishing a medium-voltage four-terminal flexible DC transmission system model, the simulation results verified that the proposed adaptive slope correction control strategy could effectively maintain the stable operation of the system.