A Grid-Connected Multilevel Current Source Inverter and Its Protection for Grid-Disconnection

Figure 16

Operation of the system under grid disconnection. Top to down: Capacitor 𝐶_𝑜 voltage (100 V/div), Output current (1 A/div), grid disconnection detector by using overvoltage detector (5 V/div), and Capacitor voltage 𝐶_𝑟 (100 V/div). Time 20 ms/div.