考虑不确定性的微网日前经济优化调度区间线性规划方法  

Interval Linear Programming Method for Day-ahead Optimal Economic Dispatching of Microgrid Considering Uncertainty

作　　者：王守相[1] 王栋[1] 韩亮[1] 

机构地区：[1]天津大学智能电网教育部重点实验室,天津市300072

出　　处：《电力系统自动化》2014年第24期5-11,47,共8页Automation of Electric Power Systems

基　　金：国家重点基础研究发展计划(973计划)资助项目(2013CB228203);国家自然科学基金资助项目(51077098)~~

摘　　要：微网中的可再生能源发电出力和负荷功率都具有不确定性特征,在微网的经济优化调度中如何考虑这些不确定性因素的影响值得深入研究。为了能够表征微网中的这些不确定性因素,采用区间数学对风速以及光照强度变化的不确定性进行了区间数描述,并结合对负荷不确定性的区间描述,提出了微网日前经济优化调度的区间线性规划模型。然后,结合分时电价,考虑微网与外部电网的电能交换问题,应用CPLEX优化软件结合C++编程实现了区间线性规划求解方法。最后,以微网中储能对系统经济运行的影响分析为例,讨论了考虑可再生能源发电出力和负荷功率的不确定性对优化结果产生的影响。算例结果验证了所提模型和方法良好的鲁棒性能,显示了对不确定性优化问题求解的有效性。The renewable energy power and load power in a microgrid both have uncertainty characteristics, the effects of which are worth careful consideration in the optimal economic dispatching of the microgrid. In order to characterize these uncertainties in the microgrid, the randomness of the wind speed and light intensity is described by the interval, and combined with the interval description of load uncertainty, a microgrid economical optimization model based on interval linear programming （ILP） is proposed. Then by referring to the time-of-use pricing, the issue of power exchange with an external grid is considered. The CPLEX optimization software combined with the C＋＋ programming is applied to the above issue. Finally, with the influence analysis of energy storage on the economical operation of the system as an example, the impact of uncertainty of renewable energy power and load power on the optimization result is discussed. The results have verified the robustness of the proposed method and model, and shown their effectiveness in dealing with uncertainty optimization.

关 键 词：微网(微电网) 经济优化调度 区间线性规划 不确定性 

分 类 号：TM73[电气工程—电力系统及自动化]