基于一致性理论的主动配电网分层分区经济性协调控制研究

Research on Economic Coordination Control of Active Distribution Network Hierarchical Zoning Based on Consistency Theory

主动配电网分区协调控制兼顾区域间的全局协调和各区域的内部优化控制,而传统全局协调方法可靠性原则主导下不平衡功率分配方法以及集中优化方式,不能满足当前经济性主导的主动配电网运行要求。为此提出一种基于一致性理论的主动配电网分层分区经济性协调控制方法。采用双层多智能体系统实现区域间的协调与各区域的内部优化控制,将各级智能体视为等效电源,通过发电成本微增率一致性控制以实现整体经济性最优;同级相邻智能体间信息交互,优化与控制过程均在智能体本地进行,各智能体优化所需计算量少并能够根据配电网变化快速调节自身运行状态。采用IEEE 33节点系统的主动配电网算例进行仿真,验证了算法在维持主馈线出口功率基本不变情况下能够适应配电网网络变化,并快速调节各可调单元成本微增率到一致,满足所提控制需求,对未来主动配电网的研究具有借鉴意义。

The zoning coordination control of active distribution network takes into account the global coordination between regions and the internal optimization control of each region.However,the unbalanced power distribution method and the centralized optimization method under the reliability principle of the traditional global coordination method cannot meet the operation requirements of the current economy-oriented active distribution network.For this reason,an economic coordination control method of active distribution network based on the consistency theory was proposed.The two-level multi-agent system was used to realize the coordination between regions and the internal optimization control of each region.The intelligent agents at all levels are regarded as equivalent power sources,and the overall economic optimization was achieved through the consistent control of the micro-increment rate of power generation cost;the information interaction,optimization and control process between adjacent agents at the same level were all carried out locally in the agent.The agent optimization requires less computation and can quickly adjust its own operation status according to the changes of the distribution network.An active distribution network example of IEEE 33-bus system is used for simulation,and it is verified that the algorithm can adapt to the changes of the distribution network and quickly adjust the cost of each adjustable unit to the same rate under the condition that the power at the outlet of the main feeder is basically unchanged,so as to meet the proposed control requirements,which is of reference significance for the research of the active distribution network in the future.