Optimization method of district operation of urban power grid based on VSC-HVDC operation mode adjustment

Abstract

Urban power grid has a series of problems such as limited power supply capacity and insufficient reactive power reserve. Reasonable access to VSC-HVDC can effectively alleviate the above problems. In terms of reactive power control, VSC-HVDC can be incorporated into the traditional reactive power support system of regional urban power grids by taking advantage of the rapid, flexible and controllable dynamic reactive power transfer out of VSC-HVDC. Based on BPA simulation, this paper verifies the reactive power support effect of VSC-HVDC on the power grid in the case of flexible direct interconnection of urban power grid partitions and proposes an optimization method of urban power grid partition operation based on the adjustment of VSC-HVDC operation mode, which improves the stable operation level of power grid partitions on the basis of giving full play to the flexible direct reactive power support effect.