An AC/DC loss allocation method considering three-terminal flexible direct current under power market environment

The increase of the types of DC transmission line pose a greater challenge to the problem of AC/DC network loss allocation under the power market environment. In this paper, marginal loss coefficient method is extended based on the idea of sensitivity analysis, and then a network loss allocation method for AC-DC hybrid system suitable for power market is proposed. First of all, formulation of network loss is improved. Then the chain derivative relationship is solved based on AC/DC operating equations. Finally, marginal loss coefficient is solved and network loss calculation is performed. simulation of IEEE-39 AC/DC hybrid system verifies the accuracy of the model solution, the effectiveness of the model in the electricity market environment, and the applicability in large-scale system.