MODELING AND SOLUTION IMPLEMENTATION OF HIGH VOLTAGE DIRECT CURRENT SYSTEMS IN THE MATPOWER AC POWER FLOW PROGRAM
Power flow; fast decoupled Newton-Raphson method; HVDC; MATPOWER; ANAREDE.
This MSc dissertation presents a computational tool which, incorporated into the MATPOWER AC power flow solution program, the resolution of the power flow problem (PFP) in integrated AC-DC networks. The integration was possible by incorporating new scripts specifically developed to enable the interconnection of AC and DC networks. The PFP resolution uses an alternating scheme in which the Newton-Raphson method determines AC bars’ voltage magnitude and angle states. From these results, the variables on the DC side and vice versa are calculated iteratively. This process continues until the final convergence of the PFP. To demonstrate the efficacy of the proposed approach, a suitable procedure was developed for inputting modeling data relating to the CC link and reading it using the adapted MATPOWER program. Furthermore, scripts with commands were implemented to calculate the solution of the CC link equations, incorporate them into other MATPOWER command scripts, and present the results appropriately. Finally, the results of the tests in MATPOWER were validated through comparisons of tests carried out in the ANAREDE application, ensuring the equivalence of the results.