Application Of Consensus Of Multi-agent Systems In Power Systems

In order to solve the dilemma of traditional energy and ensure the sustainable development of human beings,renewable energy represented by wind power and photovoltaic power generation has been widely promoted and applied.In the future power grid,the penetration rate of renewable energy power generation in the power system will continue to increase.Due to the inherent defects such as randomness.intermittentness and volatility in renewable energy generation,the microgrid is an effective supplement to the large power grid.It is the link between the distribution network,the distributed power supply and the load,and it can also coordinate contradictions between the large power grid and the distributed power supply.The energy storage system unit can be controlled flexibly and greatly improves the power quality,stability and power supply reliability of the microgrid.It is an important part of the microgrid.In microgrid.managing distributed energy in safe and efficient operation is a key issue.The power system is an organic combination of a series of controllable power devices that enable information interaction through the network.The generator,the flexible load and the energy storage system unit are modeled as agents,and the microgrid is further modeled as a multi-agent system.And the generator,the flexible load and the energy storage unit exchange information with other agents through the local communication network,achieving the coordinated optimization of the entire microgrid.In this paper.the multi-agent system is used as the background,and the application of multi-agent system consistency in power system is analyzed.The main research contents of this paper include:In this paper,an event-triggered consensus algorithm is proposed based on the consensus of multi-agent system to solve the economic dispatch problem in micro-grid.Each agent only needs to obtain its local cost parameters,local load and neighborhood information.Each agent participates in neighborhood information exchange and local calculation,and the economic distribution converges to the optimal value after iteration.Also,an event-triggered strategy is considered to reduce the amount of agent computing and communication with neighbors.This can save communication bandwidth and energy,and meet the economic requirements of the power grid.Furthermore,this paper proposes an event-triggered finite-time consensus algorithm,which can ensure that the state variables of distributed energy converge to the optimal solution in a finite time,and the event-triggered strategy is considered to reduce the communication frequency.As the penetration rate of intermittent renewable energy sources becomes higher and higher,the advantages of this algorithm are attractive when the power generation supply and load in the microgrid vary greatly.Finally,in order to study the economic distribution problem which there is random delay in communication network of microgrid,based on the consensus of multi-agent system,this paper proposes a consensus algorithm based on random delay,and the effect of random time delay on the stability of the algorithm is studied.At the same time,an allowable delay limit is calculated based on the Lyapunov stability condition.The algorithm is stable when the actual delay meets the requirements.And this paper uses the IEEE-30 bus system and other models to verify the effectiveness of the proposed algorithm.