考虑网络损耗的节能发电调度模型及其混合整数二次规划算法

Energy-saving Generation Dispatching Model Considering Transmission Losses and Its Mixed Integer Quadratic Programming

首先,提出一种非凸的节能发电调度模型,该模型考虑了火电机组的发电阀点效应、直流潮流、线路的安全传输容量约束和网络损耗;然后,运用线性近似和混合整数编码技术处理非光滑的目标函数和网络损耗,并将直流潮流和线路的安全传输容量约束表示为线性约束,从而将非凸的节能发电调度模型转化为混合整数二次规划模型;最后,通过IEEE-30节点系统、IEEE-118节点系统和波兰2746节点系统测试所提模型和方法,并与直流最优潮流模型和交流最优潮流模型的仿真结果进行比较。对比结果验证了所提模型和方法在节能发电调度中的有效性。

This paper firstly presents a non-convex energy-saving dispatching model considering generation valve point effect, DC power flow, security transmission capacity constraints of lines and transmission losses. Then, it uses linear approximation and mixed integer coding technology to deal with non-smooth objective target function and transmission losses, as well as represents DC power flow and security transmission capacity constraints of lines as linear constraints so as to convert the non-convex energy-saving generation dispatching model into a mixed integer quadratic programming model. Finally, it tests proposed models and methods by employing IEEE-30 node system, IEEE-118 node system and Polish 2746 node system, and compares simulation results with those of DC and AC optimal power flow models. Comparison results verify validity of proposed models and methods in energy-saving generation dispatching.