The Japanese government has set the target amount of PV penetration 53GW by 2030. However, a large penetration of PV will cause several problems in power systems. One of these problems is the voltage increase due to decreased load demands associated with large PV active power output. Another problem is voltage variation caused by PV system output variation. In this paper, we focus our attention on voltage and reactive power control for large PV penetration and propose voltage control using PF (PV Power Factor), SC (Static Capacitor) and TAP (Transformer Tap). In the proposed method, the SC and TAP controls consider voltage stability by the use of VMPI-i and VMPI-i Sensitivity, and the PF control suppresses voltage variation and voltage increase. Finally, we simulate the controls with the Ward-Hale system to verify the validity of the proposed method.
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