多时间尺度的直流配电网运行优化

Operation Optimization of DC Distribution Network with Multi-time Scale

为了实现直流配电网的安全可靠经济运行,建立了2种直流配电网的运行优化模型。首先论述了直流配电网运行优化的各种目标,针对上述目标提出了2种时间尺度不同的直流配电网运行优化模型:一种是以功率损耗和电压偏差为目标函数的实时潮流优化模型;另一种是考虑源网荷出力特性的日前优化模型,以日运行成本最低以及负荷方差最小为目标进行削峰填谷优化。给出了2种模型的求解方法并用9节点的直流配电网对上述2种模型进行了仿真计算。仿真结果验证了模型改善直流潮流分布以及削峰填谷的效果。

In order to realize the safe and reliable operation of DC distribution network,two operation optimization models of DC distribution network are established in this paper.Firstly,the objective functions of DC distribution network operation optimization are discussed.Aimed at the above objective functions,two DC distribution network operation optimization models are proposed:one is the real-time power flow optimization model with power loss and voltage deviation as the objective functions;the other is the dayahead optimization model considering the source network load characteristics,with the daily operating costs and load variance as the objective functions of load shifting optimization.The solutions of the two models are given,and the two models are simulated in a 9-node DC distribution network.The simulation results verify the effectiveness of the models in improving the DC power flow distribution and load shifting.