考虑风光预测精度特性的多时间尺度机组组合方法  

Multi-time scale unit combination method considering precision characteristics of wind power and solar power forecasting

作　　者：舒国栋 贺平平 马瑞[1] SHU Guodong;HE Pingping;MA Rui(School of Electrical and Information Engineering,Changsha University of Science and Technology,Changsha 410004,China)

机构地区：[1]长沙理工大学电气与信息工程学院,湖南长沙410004

出　　处：《电力工程技术》2020年第3期78-83,共6页Electric Power Engineering Technology

基　　金：国家自然科学基金资助项目(51677007)。

摘　　要：考虑风电和光伏预测精度伴随时间尺度缩小而提高的特点,建立了一种考虑风光不确定性接入的含风光出力旋转备用容量的多时间尺度机组组合模型及其调度方法。该调度模型基于3个不断缩小的时间尺度级,将逐级提高的风光预测值更新至风光出力等效负荷和旋转备用中,采用下级修正上级偏差的方式,对不同时间尺度采用动态规划算法求解,获得逼近最大化消纳风光出力且兼顾传统机组经济最优化的机组组合方式。以修改的IEEE 30节点系统为算例进行仿真计算,验证了该方法的合理性和有效性。Considering prediction accuracy of wind and solar power generation increasing with time scale reduction,a multi-time scale unit commitment model with wind and solar power output rotating reserve capacity is established.Meanwhile,dispatching method considering uncertainty of wind and solar power is established.Based on three time scales reduced step by step,the model updates predicted values of wind and solar power step by step to the equivalent load of wind and solar power output and rotating reserve.Then,the lower level is used to correct the upper level deviation,and the dynamic programming algorithm is used to solve the problem at different time scales to obtain the unit combination mode which approximates to maximize wind and solar output and takes economic optimization of traditional units into account.The modified IEEE 30-bus system is used as an example for simulation calculation and the results verify the validity and rationality of the proposed method.

关 键 词：风光发电 时间尺度 预测精度 动态规划 调度方法 

分 类 号：TM732[电气工程—电力系统及自动化]