Multi-agent system for voltage/var optimization considering multi-regional power systems

A 3-hierarchical-level architecture, in which the management sub-region is designed as the calculation unit, is adopted to optimize the voltage/var in multi-regional power systems. The multi-agent system which combines the management sub-region with the optimization sub-region is proposed. By using a decomposition-coordination model, the distributed and parallel optimization algorithm, based on auxiliary problem principle, is carried out. The coordination and negotiation mechanism is accomplished by using the data-driven model to optimize the voltage/var in large, multi-regional power system. Taking the power network of Zao Zhuang, Shandong province, China, as an example, this paper discusses the operation mechanism and the optimization method in existing multi-regional systems. Application case shows that this system provides more applicable solutions than the one that does not consider multi-regional interaction with faster optimization speed, less net losses and higher average voltage level in the application of the multi-agent system to the voltage/var optimization of large power system networks.