考虑输电线路故障的风电场容量可信度计算

Calculation of Wind-farm Capacity Credit Considering Transmission Line Faults

风电场容量可信度的计算是确定风电场替代火电厂后可节约的成本以及确定风电上网电价、进而提高风电场经济价值的重要基础。提出了基于有效载荷能力的风电场容量可信度定义,并提出一种基于非序贯蒙特卡罗仿真、采用弦截法计算风电场的容量可信度的算法。该方法考虑了输电线路故障,采用理想常规发电机组和多状态发电机组来衡量容量可信度。编写了相应程序,计算了IEEE-RBTS系统增加风电场后的风电场容量可信度,并结合IEEE-RTS79系统分析了输电线路故障对风电场容量可信度的影响。

The calculations of capacity credit of wind farms are the important basis of determining the saving cost due to traditional generators replaced with wind farms, and determining the pool purchase price of wind power generation, and also the basis of the improvement of economic value of wind farms. This paper presents a definition of wind-farm capacity credit based on effective load carrying capability, and a calculation method for wind-farm capacity credit on the basis of non-sequential Monte-Carlo simulation, in which secant method is used. Ideal traditional generators and multi-states generators were applied to calculate the capacity credit with the considered transmission line fault. The corresponding software is programmed, and the wind-farm capacity credit with IEEE-RBTS test system was calculated, and the influence of transmission line faults on wind-farm capacity credit was analyzed in IEEE-RTS79 test system.