Power quality control of voltage source converter-based HVDC system using particle swarm optimisation

摘要

Power quality control of voltage source converter (VSC)-based high voltage direct current (HVDC) transmission system is proposed in this paper. The particle swarm optimisation (PSO) technique is used for selection of optimum controller gain which results quick response to various transient conditions such as load perturbation, voltage sag, nonlinear load, and tapped load fault at points-of-common coupling (PCC). The conventional PSO approach is modified to get various power quality indices such as harmonic distortion, power factor, and DC-link voltage ripple within the limits for an 18-pulse VSC-based HVDC system. The effectiveness of proposed PSO approach is compared with conventional PI tuning, i.e., Zeigler-Nichols approach. The complete design and optimisation process are presented using illustrations, equations and flow charts in a simplified manner so as to provide a good support for readers.