Voltage Control Using PV Power Factor, Static Capacitor, and Transformer Tap for Large PV Penetration

The Japanese government has set 53 GW as the target level of PV deployment by 2030. However, the large-scale introduction of PV will cause several problems in power systems. One of these problems is the increase in voltage due to decreased load demands associated with large PV active power output. Another problem is voltage variations caused by fluctuations in PV system output. In this paper, we focus our attention on the voltage and reactive power control for large-scale PV deployment and propose voltage control using the PF (PV power factor), SC (static capacitor), and TAP (transformer tap). In the proposed method, the SC and TAP controls consider voltage stability through the use of VMPI-i and VMPI-i sensitivity, and the PF control suppresses voltage variation and voltage spikes. Finally, we simulate these controls using the Ward-Hale system to verify the validity of the proposed method.