Composite Energy Storage System with Photovoltaic Power Generation and Uninterruptible Power Supply Function

Table 1

Operation condition in islanding mode.

Condition	Control
	Boost converter	Bidirectional converter
(1) 𝑃PV>𝑃𝑜, 𝑃PV<(−𝑃bat,max)+𝑃𝑜	MPPT	𝑉𝐶𝑑 regulation
(2) 𝑃PV>𝑃𝑜, 𝑃PV>(−𝑃bat,max)+𝑃𝑜	𝑉𝐶𝑑 regulation	Battery charging
(3) 𝑃PV<𝑃𝑜	MPPT	𝑉𝐶𝑑 regulation