Multi-agent Based Energy Management And Switching Control Of Distributed Generation System

Distributed generation system is a new energy system, which is utilizing decentralizedrenewable energy sources such as solar energy, wind energy, and local fuels like natural gas,hydrogen that can be easily accessed to generate power economically and efficiently bypower equipments of small capacity, which is in the vicinity of users. The distributedgeneration technology, making full use of clean and renewable energy, is an importantmeans of the power industry to implement low carbon economy. Distributed generationsystem has significant advantages in such aspects as comprehensive efficiency, energydiversification, environment protection, energy saving, power supply reliability and so on.However, large-scale distributed generation in power system is easy to cause security,stability, energy management and a series of systemic problems. Therefore, this paperfoucuses on the energy management of distributed generation system based on stabilityassessment, in order to ensure the system operating in the premise of security,environmentally and economically.Firstly, this paper introduces the theory of Agent and Petri-net. Then thecharacteristics of distributed energy resources and the stability of distributed generationsystem are analyzed, and voltage security assessment index of distsributed generationsystem based on information fusion technology is proposed, by which four operationmodes of system are defined. In addition, multi-modes switching models of distributedgeneration units and switching model of system operation modes were built by Petri-nets,and a coordinated control scheme based on Multi-Agents System (MAS) is proposed assolution to the complex distributed energy management. Corresponding to differentoperating modes of the distributed generation system, based on mult-modes switchingPetri-net models, the energy management and switching control strategies are designed toensure distributed generation system operating environmentally and economically underthe condition of security and stability. Finaly, a typical distributed generation system thatcontains many kinds of distributed energy resources is simulated by MATLAB and JADE,and the validity of proposed control scheme in different operating modes is demonstrated by means of simulation results.