Research on the impact of large-scale integrated wind farms on the security and stability of regional power system

摘要

The randomness of nature resource and the particularity of generation technology of wind power generation are important factors for restricting further utilization of the wind resource. This paper analyzes the impacts of grid connected wind farms on the regional power system security and stability through the research on the regional grid with large scale wind power integration. Through simulation method, this paper analyzed the impacts of the integrated wind farms on the bus voltage, reactive power compensation, power flow distribution, network loss, etc; the impact of dynamic characteristics of wind turbines on the grid transient voltage and power system frequency stability are investigated, and the significance of wind turbines low voltage ride through (LVRT) capability to power system security and stability is emphatically analyzed, measures for improving power system transient voltage characteristic are proposed, and their effectiveness on the power gird construction as well as safe and stable operation is validated.