Development of Online Dynamic ATC Calculation Integrating State Estimation

Abstract

Dynamic Available Transfer Capability (DATC) is one of the critical calculations in the electricity market. A combined method for DATC calculation (CDATC) is proposed. The CDATC as a combination of the Newton-Raphson-Seydel (NRS) and the Down-Hill (DH) evolves while overcoming their limitations. The proposed method makes use of Estimate-PEBS (EPEBS) and Estimate-POMP (EPOMP) to find transient stability. Further, online state estimation (ES) is integrated into the model to sound the solution more realistic. Simulation results exhibited that the proposed CDATC can cater to a quality solution represented by fast computational performance and higher accuracy results as compared with FADATC method. Implementation of the developed model on the real-world system of the West-Iran with 848 bus and Iowa State with 145 bus proved its suitability for utilities even in presence of large wind farms. The simulation results further indicated that the CDATC can be used for online applications for large systems.