Design and Engineering Demonstration of Power Router Based on VSC-HVDC Transmission

How to improve the friendliness of new energy grid-connected through flexible control of power electronic devices, realize the multi-directional orderly flow of energy and secure and stable operation of the power grid, fully verify the rationality of the power grid structure and the performance of the stability control equipment through simulation to guide the actual engineering construction and control equipment access-in are the main technical problems to solve the flexible consumption of new energy and accelerate the construction of new power system. Based on the advantages of flexible DC transmission, flexible power flow control, easy to realize multi-terminal interconnection and form a HVDC transmission network, a “router” type networking structure is proposed, which can realize the flexible access, plug and play of heterogeneous new energy power generation units, and realize rapid power adjustment and grid frequency/voltage stability control through joint control between converter stations. Through standard modular modeling, a digital-analog hybrid simulation platform based on parallel computing of heterogeneous processors is constructed, hardware-in-the-loop tests of power grid operation control strategy are carried out, and engineering empirical research is carried out to verify the reliability and effectiveness operation capability of power router system.