Research on nodal power injection mode in ATC determination

Available Transfer Capability (ATC) is an operating index that plays an important role in guiding intra-area electricity trade for interconnected systems. Continuation power flow (CPF) is the main calculation approach used to determine ATC. But in the conventional CPF method, a specific proportional linear nodal power injection mode is widely adopted, accordingly, ATC achieved by this kind of the CPF approach is a specific value corresponding to certain an operation state, but not a reliable and economic ATC from the viewpoint of practical operation. In this paper, we focus on the selection of nodal power injection mode for ATC determination, and making comparison studies for different nodal power injection modes. Modal analysis is used to search for a load increase mode that mostly affect ATC, economic dispatch (ED) is incorporated into the CPF in a piecewise linear way. A master-slave iterative CPF method is proposed to calculate ATC. The IEEE-30 bus test system is used to testify the proposed approach, the simulation results show that the proposed approach can provide a more reliable and economic ATC.