Research On Large-scale Wind Power DC Island Transmission C Haracteristics And The Control Strategy

China’s total wind energy resource is very rich, but wind energy mainly in the northwest and northeast regions far away from load centers, mainly in the electricity market in Beijing, Tianjin, the Yangtze River Delta and Pearl River Delta region. Resource distribution and the uneven power market of China’s recent decision to stage a large-scale wind power development must rely on wind energy resource-rich areas, to build a large base, the way into the bulk power system planning and layout, in the context of a larger consumption of wind power. UHVDC transmission to solve the problem of wind power is one effective way, island operation mode DC is more typical runs. Intermittent supply of wind power as a large-scale wind power connected to the grid in the region to optimize the power structure, but also to the grid frequency modulation, peak shaving, voltage regulator, and many other enormous difficulties, the article mainly to China Electric Power Research Institute power system analysis software for the simulation platform, combined with the "wind farm grid technology" and the "guidelines for power system security and stability" and other relevant provisions of the DC-depth study of island wind farms and network operating system after the active frequency voltage and reactive power the operating characteristics, according to the wind power islands outgoing DC characteristics of the corresponding operation of the system of wind power and thermal power, wind power and DC systems and power system control strategy coordinated grid of recommendations for improvement to ensure that the outer islands of wind power DC delivery system of safe and stable operation, and thus improve the system’s maximum transmission capacity of wind power.