基于分布鲁棒优化的含风电系统静态安全校正控制方法

Static security corrective control method of wind power-integrated system based on distributional robust optimization

提出一种计及风电出力不确定性的电力系统静态安全校正控制方法。考虑与风电预测方法的合理对接,采用风电预测出力的区间及期望值信息描述风电的不确定性。以调整措施耗费的经济成本最小为目标,考虑发电机出力调整和切负荷2种控制措施,建立考虑风电波动的有功安全校正控制模型。基于分布鲁棒线性优化理论,将含有不确定性参数的校正控制模型转化为仅含确定性参数的鲁棒对等模型,并采用线性规划方法进行求解。某区域电网算例结果表明,所提模型得到的校正控制方案能够应对各种可能的风电波动;同时,该模型可实现控制策略经济性与鲁棒性的相互转化,并能给出控制策略鲁棒性程度的概率评价。

A static security corrective control method for power system is proposed with the consideration of wind power uncertainties. In order to rationally connect with wind power forecasting method,the range and mean value of wind power output are used to describe the uncertainties. An active power security corrective control model is established with the consideration of wind power fluctuations,which takes the minimum economic cost of adjustment measure as its objective,and considers two control measures of generator output adjustment and load shedding. On the basis of distributional robust linear optimization theory,the corrective control model with uncertainty parameters is converted to robust peer-to-peer model only with certainty parameters,which is solved by linear programming method. The case results of a regional power grid show that the corrective control scheme obtained by the proposed model can deal with various wind power fluctuations,meanwhile,the model can realize the transition between economy and robustness of control strategy,and give corresponding possibility evaluation of robustness degree for control strategies.