含能源互联微网的主动配电网分层分布式协调控制

目前,天然气网络、热力网络和电力网络在主动配电网中的耦合联系加深,共同为用户提供冷、热、电、气等多种不同形式的能源,但相关的协调控制技术仍不成熟。以电网为核心,和热网、天然气网进行互动优化,首先提出了含电力网络、天然气网络和热力网络的综合建模方法,对各能源子系统多能流的约束条件及运行目标进行了综合优化,实现了多能源协调互补和深度融合。然后,设计了多微网和主动配网之间在稳定运行时的分层分布式协调控制策略,将系统分为主动配电网层、能源互联微网层和元件层的三级控制结构,在元件层提出采用改进后的二级功率优化控制来进行分布式设备之间的协调控制。最后,利用PSCAD/EMTDC仿真软件,搭建主动配网的仿真平台,含3个能源互联微电网来证明智能调控方法的合理性。

Hierarchical distributed coordinated control of active distribution network including energy interconnection micro grid

At present, the coupling of natural gas network, thermal network and power network in the active distribution network has been deepened to jointly provide users with cold, hot, electric, gas and other forms of energy, but the relevant coordination control technology is still immature. This paper takes the power grid as the core and conducts interactive optimization with the heat and natural gas networks. Firstly, it puts forward a comprehensive modeling method including the power network, natural gas network and thermal network, and comprehensively optimizes the constraint conditions and operational objectives of multi-energy flow of each energy subsystem, so as to realize the coordination and complementarity of multi-energy and in-depth integration. Then, a hierarchical distributed coordinated control strategy is designed for the stable operation of multi-micro grid and active distribution network. The system can be divided into the active layer, the interconnected microgrid layer, and the component layer, in which the improved secondary power optimization control for the coordination is proposed between the distributed equipment control. Finally, PSCAD/EMTDC simulation software is used to build a simulation platform for active distribution network, which includes three energy interconnection microgrids, to prove the rationality of intelligent control method. This work is supported by Science and Technology Project of State Grid Shandong Electric Power Company (No. SD18-GC-ZB003-ZH-KJ) and Science and Technology Project of the Headquarters of State Grid Corporation of China (No.52060018000N).