考虑源荷不确定性和N-1安全约束的电力系统优化调度  

Optimal dispatch of power system considering uncertainty of both source and load sides and N-1 security constraint

作　　者：余雁琳 杨苹[1,2] 曾凯林 陈芯羽 Yu Yanlin;Yang Ping;Zeng Kailin;Chen Xinyu(School of Electric Power,South China University of Technology,Guangzhou 510640,China;Guangdong Key Laboratory of Clean Energy Technology,Guangzhou 511458,China)

机构地区：[1]华南理工大学电力学院,广东广州510640 [2]广东省绿色能源技术重点实验室,广东广州511458

出　　处：《可再生能源》2024年第5期664-674,共11页Renewable Energy Resources

基　　金：广东省科技计划项目(2017B030314127);南方电网数字电网研究院有限公司科技项目(YTYZW20010)。

摘　　要：大规模风电并网增加了系统运行的不确定因素,文章利用快速可调资源平抑风电和负荷波动引发的功率不平衡,并考虑备用调用过程减少对系统潮流的影响。首先分析了风电和负荷预测误差的概率分布模型;然后,建立含N-1网络安全机会约束和旋转备用机会约束的电力系统优化调度模型,以系统调度总成本最小为目标优化机组出力;最后,基于起作用整数变量的识别方法的Benders分解法处理N-1网络安全约束,提高求解效率。利用修正的IEEE30节点系统,验证了所提模型能够保障系统备用可用性、经济性和安全性,充分挖掘抽水蓄能的快速可调能力。Large-scale wind power grid integration increases the uncertainties of system operation.It is urgent to use rapidly adjustable resources to smooth the power imbalance caused by wind power and load fluctuation and consider the impact of spinning reserve calling process on the system power flow.Firstly,the probability distribution model of wind power and load prediction error is analyzed.Then,the optimal dispatching model of power system with N-1 network security opportunity constraint and spinning reserve opportunity constraint is established,and the unit output is optimized with the goal of minimizing the total dispatching cost.Finally,the Benders decomposition method based on the identification method of active integer variables is used to deal with the N-1 network security constraints to improve the solving efficiency.Using the modified IEEE30-node test system,it is verified that the proposed model can guarantee the reserve availability,economy and safety of the system,and fully excavate the fast adjustable capacity of pumped storage.

关 键 词：风电并网 N-1安全 旋转备用 优化调度 

分 类 号：TK51[动力工程及工程热物理—热能工程]