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多时间尺度的直流配电网运行优化研究

易越1,袁志昌2,郑浩3,史梓男4,马唯婧4   

  1. 1. 清华大学电机系
    2. 清华大学
    3. 国家电网公司安徽省电力公司
    4. 国网北京经济技术研究院
  • 收稿日期:2017-06-27 修回日期:2018-04-09 发布日期:2018-08-21
  • 通讯作者: 易越
  • 基金资助:
    国家电网公司科技项目(交直流混合配电网电压序列及关键技术研究)

Research on Operation Optimization of DC Distribution Network with Multi - time Scale

  • Received:2017-06-27 Revised:2018-04-09 Published:2018-08-21

摘要: 直流配电网的运行优化问题具有重大研究意义。为了实现直流配电网的安全可靠经济运行,本文建立了两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两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,以日运行成本以及负荷方差为目标函数进行削峰填谷优化。给出了两种模型的求解方法,并针对一个九节点的直流配电网对上述两种模型进行了仿真。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。

关键词: 直流配电网, 多目标优化, 多时间尺度

Abstract: The operation optimization of DC distribution network is of great significance. In order to realize the safe, 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 day-ahead 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 nine - node DC distribution network. The simulation results verify that the models improve the DC power flow distribution and achieve load shifting.

Key words: DC distribution network, multi-objective optimization, multi-time scale