考虑尾流效应和集电系统元件故障的风电场可靠性建模

Reliability modeling of wind farm considering wake effects and fault of collector system components

分析平坦地形和复杂地形下风电机组间尾流效应对风电场输出功率的影响;建立两状态等值风电机组以及五状态断路器、三状态变压器等集电系统元件的可靠性模型,考虑集电系统元件故障对风电场输出功率的影响。运用威布尔分布模拟风速概率分布,对风速、等值风电机组状态、集电系统元件状态等进行非序贯蒙特卡洛抽样,基于MATLAB平台仿真计算。结果表明,尾流效应和集电系统元件故障对风电场的输出功率都有不可忽视的影响,综合考虑二者的风电场可靠性模型提高了对风场输出功率计算的真实性和准确性,评估风电场并网可靠性指标时更为精确、贴近实际。

This paper analyzes the impact of wake effects on output power of wind farm in both flat terrain and complex terrain.Considering the influence of component failure in the collector system on the output power of the wind farm,the reliability models of collector system components,such as two-state equivalent wind turbine model,five-state circuit breaker model and three-state transformer model,are established.The Weibull distribution is adopted to simulate the probability distribution of wind speed,and based on MATLAB and non-sequential Monte Carlo,sampling simulation is conducted for wind speed,equivalent wind turbine status,and collector system component status.The results show that wake effect and fault of collector system components have a significant influence on the output power of the wind farm.The reliability of wind farm model established by comprehensive consideration of the two facts will get more realistic and accurate wind farm power calculation results,and will be more accurate and practical when evaluating wind farm grid-connected reliability indices.