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Voltage-Violation Mitigation in Power System Networks With Photo-Voltaic Penetration

This study explores the influence and control strategies of rising photo-voltaic (PV) penetration in power system networks. The power system network is simulated for varying levels of PV penetration and a non-linear pattern of voltage increase is observed with increasing PV penetration. Popular local control strategies to tackle the overvoltage problem: reactive power control; active power curtailment; and power factor control are then analysed. Simulations of these control techniques are carried out under different weather conditions to analyse the suitablility of these techniques. The combination of active power curtailment and reactive power control strategies is explored to provide higher efficiency and cater for the deficiency of both techniques. The analysis and simulation of these control techniques would be an aid for power system operators to evaluate penetration levels of PV in the network as well as provide technical support for local control techniques to alleviate overvoltages.