Distributed Control Strategy for Transient Overvoltage of DC Transmission-end Power Grid Based on New Energy

Abstract

With the increasing scale of new energy access to the power grid, UHVDC transmission has become an important way for its consumption. At the same time, THE fault of UHVDC causes transient overvoltage in the power grid of the new energy delivery end, which causes the off-grid of new energy and seriously limits the UHVDC transmission capacity, which becomes an urgent problem to be solved. To this end, this paper proposes a new kind of dc power supply sending power grid transient overvoltage of distributed control strategy, first analyzes the UHVDC fault of new energy sending power grid transient overvoltage mechanism, based on this, put forward control of transient overvoltage UHVDC rectifier station and the sending power grid of distributed control framework, and based on dc fault transient overvoltage of the new energy sending grid space impact characteristics, puts forward the sending power grid transient overvoltage of distributed control strategy. Finally, simulation results show the effectiveness of the control strategy.