大规模风电并网电力系统优化潮流

OPTIMAL POWER FLOW FOR LARGE-SCALE WIND POWER INTEGRATION

为体现风电的环境价值,建立大规模异步风电并网电力系统最优潮流模型。首先根据典型日风速分布曲线预测风电场功率期望值以应对风电场功率的随机性;在此基础上,引进基于风电场极限穿透功率的风电场弃风运行惩罚成本(wind abandonment operation penalty cost,WAOPC)以处理弃风行为;最后,引入风电备用成本(reservecapacity compensation cost,RCCC)来处理随系统风电穿透水平增加而引起的系统二次备用上升。仿真表明:调整弃风运行惩罚成本系数可使风电机组的功率输出按功率期望值进行优化调度,避免弃风行为,使以风电为代表的新的能源形式的电能价值得到合理反映。

To reflect wind power environment value,an environmental/economic optimal power flow model for powergird including asynchronous wind power generation units is established. First,to deal with the randomness of the windpower,the paper computes the expectation of the wind power production according to typical daily wind speeddistribution curve. And then based on wind power forecast and wind power prediction,wind abandonment operationpenalty cost is considered to deal with the behavior of abandoning wind. At last,the reserve capacity compensation costof wind power generation units are considered to reflect the variation of thermal reserve capacity. The simulation resultsindicated that owing to the introduction of the wind abandonment operation penalty wind power generation units obtainthe priority scheduling and avoid the wind abandonment behavior,and the proposed model reasonably reflect theenvironmental value of wind power as the representative of a new form of energy.