Model Of Microsoures And Analysis Of Load Flow And Short Circuit Calculation For Microgrid

In accordance with the characteristics and operations of the microgrid, a unified analysis method of load flow and short circuit calculation is presented based on superposition principle:the node types are determined; Load flow calculation adopts the improved Zbus algorithm based on superposition principle, and the PV-node is calculated by compensation law. Short circuit calculation adopts abc phase representation short circuit algorithm based on superposition principle, so it overcomes the difficulties when applying the symmetrical components to the microgrid short circuit calculation. The method needn't complicated serial numbers, is not sensitive to the initial values, and R/X ratio does not affect the convergence. The program is complied by Matlab, and real datas verify the effectiveness of the method.The overall model of microturbine generation system with the mind of "unit" modular is built; the PV panel model is built with specifications; the fuel cell model is built. Finally, in PSCAD/EMTDC software, all the models are simulated.