考虑噪声影响的风电场功率分配优化模型

OPTIMIZATION MODEL OF POWER DISTRIBUTION OF WIND FARMS CONSIDERING NOISE IMPACT

提出一种考虑噪声影响的场级功率分配算法,在满足电网调度指令的同时最小化风电机组运行产生的噪声。首先,根据采集的有功功率与对应的风电机组声功率级噪声值数据,采用多项式拟合,确定有功功率与风电机组声功率级噪声之间的函数关系。然后,根据GB/T 17247.2—1998提供的噪声传播计算方法,建立有功功率与接收点噪声之间的函数关系。其次,建立考虑功率控制、风电机组启停变化与接收点噪声限值约束的风电场功率分配多目标优化模型,采用遗传算法求解该模型。最后,通过3个不同噪声监测点分布的案例,验证该调度模型能有效满足电网限电要求的同时降低机组运行噪声,并且在实际应用上具有通用性。

A power distribution algorithm of wind farms considering noise impact is proposed to achieve the power distribution command from the power grid while minimizing the noise generated by the wind turbine operation.Polynomial fitting method is adopted to determine the relationship between the active power and the noise produced from wind turbines based on the real data.Then,the relationship between the active power and the noise at the observation site is built according to the calculation method provided by GB/T17247.2—1998.Next,a multi-objective optimization model concerning power control and on-off switching state is established with the constraint of environmental noise limit constraints,and genetic algorithm is used to obtain solutions.Finally,it is approved that this power distribution model can effectively satisfy the power limitation requirement of the grid and also reduce the noise of turbines,and the universality of the presented model are verified through three cases with different distributions of observation sites.