In the past decades, power systems in the whole world have been facing pressure to he deregulated or restructured. Tbis researeh has designed an agent-based retail electricity market to simulate the trading procedure in modem power systems, and utilize Colored Petri nets technology to present the communications and cooperatino nf agents in the market. We design fnnr kinds of participant agents: Power Exchanger Agent(PXA), Power User Agents(PUAs), Retail Company Agents(RCAs) and Independent Power Plant Agents (IPPAs). PXA is supervisor of the marketplace, in charge of opening and dosing the market, and dealing with the trading request from the other agents, avoiding conflicts with constraints of power transmission grids. The other three kinds of agents could enter the marketplace arbitrary if it opens and freely select their satisfied consumerdproviders, which are the chief distinctions of our design. The results of analysis show that the proposed retail electricity market could increase efficiency, reduce operational costs and give consumers more alternatives. Though it has more latently conflicts and concurrencies, which cause a tittle complication, we successfully deal with them by colored Petri nets.
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