Abstract
With the closer coupling of power system and heat system, the analysis of multi-energy flow is become more and more import. Firstly, a unified objective function is constructed with the minimum supply cost. Then the optimal power flow model is established considering the constraints of unit output, coupling equipment operation and transmission line energy flow. Finally, based on the interior point method, the integrated energy system in the electro-thermal coupling area is selected for analysis and using MATLAB programming to solve the optimal energy flow. The comparison between ordinary energy flow calculation and optimal energy flow calculation shows that the optimal energy flow can achieve the minimum cost of overall system, and realize the optimization of power system, heat system parameters and unit output. The results of energy flow optimization verify the effectiveness of the interior point method.
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