Coordination Control Of AGC And AVC Based On Multi-Agent System

With the construction of UHV AC/DC interconnected power grid,the scale of modern power grid is expanding,the voltage level and transmission capacity are increasing,which greatly improves the ability of power system to optimize resource allocation in a wide range,and the ability of power system to absorb new energy is enhanced.The large-scale distributed incorporation of new energy sources brings great uncertainty to the control of power system.It is urgent to establish an intelligent control system with real-time tracking and automatic cruising capability.Under the current development situation of high voltage and large capacity of power grid,the coupling effect of active power and reactive power has more and more significant impact on power system operation control.Ignoring the coupling effect of AGC and AVC will affect each other's control effect in the control process,resulting in voltage or frequency deviation exceeding the allowable range,affecting the economic and safe operation of power grid.It is urgent to establish active and reactive power coupling.Intelligent distributed coordinated control system.Based on the above problems,the coordinated control of AGC and AVC based on multi-agent system is proposed in this paper.Firstly,this paper studies and designs a two-tier coordinated control strategy of AGC and AVC based on hybrid time-base and event-base.On the upper level,AGC and AVC are optimized periodically based on time-base,and on the lower level,AGC or AVC are controlled and corrected separately by triggering events as driving mode.Through the two-level coordinated control strategy of AGC and AVC,the comprehensive optimization of power system security and economy is taken as the optimization objective at the upper level to solve the optimal control quantity of AGC and AVC periodically,and the independent regulation of AGC and AVC in the case of emergencies is realized based on event-driven mode at the lower level,which effectively avoids the interference between AGC and AVC.Based on the two-level coordinated control strategy of AGC and AVC,this paper establishes a three-level architecture multi-agent system to achieve coordinated control of AGC and AVC,in which the organization level realizes the periodic integrated optimization of AGC and AVC by the integrated optimization layer control strategy,and the coordination level cooperates with the corresponding local control execution level to realize the alternating control layer control strategy,which can adjust AGC or AVC autonomously in case of emergencies.Distributed autonomous regulation and correction.The autonomous and cooperative characteristics of agents are utilized to realize coordinated control while maintaining logical unification in physical distributed control.The autonomous strain ability and distributed control ability of active and reactive power control are improved,and the automatic cruise of AGC and AVC control is realized.Finally,39 nodes in New England are used to simulate and verify the advantages of multi-agent system organization-level integrated optimization in improving power system security and economy,and the control effect of AGC autonomous regulation and AVC distributed control is realized by coordination and execution level cooperation.