Impact of Parameter Uncertainty on Power Flow accuracy in multi-terminal systems

Abstract

Abstract-Accurate power flow in a MT system can be achieved with droop controllers. However, almost all publications have assumed that the DC voltage, DC current and DC cable resistances can be measured with 100% accuracy. In this paper, a novel power flow solver is developed which enables the user to analyse the impact of these parameters on power flow accuracy. The developed Parameter Uncertainty Power Flow Solver (PU-PFS) is shown to be able to accurately calculate the power flow error for hundreds of parameter uncertainty scenarios in less than a second. The PU-PFS is employed to investigate the impact of parameter uncertainty on a potential MT system and the results show that realistic measurement errors (0.2%) can result in significant power flow error (>150MW). Finally, the paper assesses the key factors which influence the power flow accuracy resulting in a number of important conclusions.

Load flow analysis of hybrid AC-DC power system with offshore wind power

“…On the other hand, long distance HVDC transmission proves to be advantageous over HVAC transmission due to the enhanced stability features, e.g., i) instantaneous precise control, ii) flexible connection among different synchronous zones, iii) enhanced transmission distance limit , whereas the reactive power flow due to large cable capacitance in submarine cables limits the maximum transmission distance, iv) capability of providing additional stability to the AC power network by constant frequency control, redistribution of power in the AC system and providing damping [9][10][11][12][13][14][15], [17]. Currently, there are three major manufacturers of VSC-HDVC systems; i.e.…”