面向微型能源互联网接入的交直流配电网协同优化调度策略

doi:10.19595/j.cnki.1000-6753.tces.201374

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摘要

分布式电源通过微型能源互联网（简称微能网）的方式接入配电网可以充分发挥微能网多能耦合互补的特点,促进可再生能源消纳。该文充分考虑交直流配电网和微能网的技术优势及交互影响,研究了计及动态网络重构和多能源协同的交直流配电网优化调度策略。首先,根据含微能网的交直流配电网系统结构和调度模型特点,研究以配电网节点边际电价和微能网购/售电功率为交互变量的协调运行机制;其次,以交直流配电网和微能网运行成本最低为目标,充分考虑网络运行约束和网络间交互耦合约束,建立交直流配电网协调调度模型;再次,在混合整数二阶锥规划模型的节点边际电价推导基础上,提出基于极限学习机耦合交互的模型快速求解方法;最后,在含微能网的改进IEEE 33节点交直流配电网开展了算例分析。仿真结果表明,所提调度架构能充分降低网络运行成本,促进微能网和交直流配电网间信息交互,同时该文所提求解技术能够在确保计算精度的前提下极大地提高求解效率。

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	郑重
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关键词 ：交直流配电网, 微型能源互联网, 协同优化调度, 动态网络重构, 极限学习机

Abstract：

By connecting distributed generations (DG) to the distribution network through micro-energy-internet (MEI), it can fully utilize the characteristics of the multi-energy coupling and complementation of MEI to promote the consumption of renewable energy. This paper gave full consideration to the technical advantages of AC/DC distribution network and MEI as well as the interaction between them, and studied the optimal dispatching strategy of AC/DC distribution network considering dynamic network reconfiguration and multi-energy collaboration. Firstly, according to the characteristics of the system structure and dispatching model of AC/DC distribution network containing MEI, the coordinated operation mechanism was studied with the locational marginal price of distribution network and the bought/sold power of MEI as interactive variables. Aiming at minimizing operating cost of AC/DC power distribution network and MEI, a coordinated dispatching model of AC/DC power distribution network was established with full consideration of network operation constraints and interaction coupling constraints. Then, based on the derivation of locational marginal price of the mixed integer second order cone programming model, a fast solving method based on the extreme learning machine coupling interaction model was proposed. Finally, an example analysis was carried out on the improved IEEE 33 node AC/DC distribution network containing MEI. The simulation results showed that the scheduling architecture can fully reduce the network operation cost and promote the information interaction between the micro energy grid and AC/DC distribution network. Meanwhile, the solution technology proposed in this paper can greatly improve the solution efficiency on the premise of ensuring the calculation accuracy.

Key words： AC/DC distribution network micro energy internet coordinated optimal scheduling dynamic network reconfiguration extreme learning machine

收稿日期: 2020-10-19

PACS:

TM732

通讯作者: 苗世洪男,1963年生,硕士,教授,博士生导师,研究方向为电力系统保护控制及微电网和主动配电网新技术等。E-mail：shmiao@mail.hust.edu.cn

作者简介: 郑重男,1998年生,硕士研究生,研究方向为电网分布式发电及储能规划、电力系统凸优化。E-mail：zzheng@hust.edu.cn

引用本文:

郑重, 苗世洪, 李超, 张迪, 韩佶. 面向微型能源互联网接入的交直流配电网协同优化调度策略[J]. 电工技术学报, 2022, 37(1): 192-207. Zheng Zhong, Miao Shihong, Li Chao, Zhang Di, Han Ji. Coordinated Optimal Dispatching Strategy of AC/DC Distribution Network for the Integration of Micro Energy Internet. Transactions of China Electrotechnical Society, 2022, 37(1): 192-207.

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