A Source-grid-load Coordinated Control Method Considering the Integration of Wind Power Generation

摘要

The grid-connection of large-scale wind farm may affect the stability of power system because of the randomness and uncertainty, while unified power flow controller (UPFC) could be used to stabilize the system on account of its capability of power flow and demand response (DR) is capable of adjusting load capacity flexibly. This paper proposes a source-grid-load coordinated control method for wind power system. In this methodology, traditional generation units and wind power plants are integrated as source side, the UPFC is utilized to regulate the power flow as grid side and the interruptible load and incentive load response to the DR signal as load side. The UPFC structure diagram is explained and its series compensation function is served as main measure to realize the power flow regulation without considering the UPFC model of shunt side. The presented model schedules the air conditioner (AC), water heater (WH) and electric vehicle (EV) without deterioration of the consumers' comfort preferences and their aggregated demand response potential (DRP) is quantified to restrain the responsive power of interruptible load and incentive load. To verify the performance of the presented approach, simulations are performed in IEEE-RTS 79 system. The results indicate that the considerable benefits can be realized by coordinating the generation units, UPFC and DR to improve the wind power utilization and reduce the generation costs.