Bidirectional current

DC/AC Inverters

Published in Ali Emadi, Handbook of Automotive Power Electronics and Motor Drives, 2017

In the conversion process, the defined quantities may be either current or voltage. There are two types of AC-to-DC/DC-to-AC converters, referring to the defined DC terminal quantities: current sourced and voltage sourced. In the voltage source inverters (VSI), DC input appears as a DC voltage source (ideally with no internal impedance) to the inverter. In current source inverter (CSI), the DC input appears as a DC current source (ideally with the internal impedance approaching infinite) to the inverter. Since power flow is reversible, they are both inherently capable of two-quadrant operation at their DC terminals; the current source is a unidirectional-current bidirectional-voltage converter, and the voltage-source is a unidirectional-voltage bidirectional-current converter.

A novel control approach for two-stage power converters in stand-alone solar photovoltaic system

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Journal Information

Published in International Journal of Electronics, 2022

Pritam Kumar Gayen

The bidirectional converter allows bidirectional current flow so that both charging and discharging operations of battery can be supported. The control of bidirectional converter keeps DC-link voltage at fixed reference value by charging or discharging operation in case of surplus or deficit of solar output power during delivery of load power. Here, power balance at common DC-link point is absolutely necessary to maintain fixed reference value of DC-link voltage. This power balance at DC-link point occurs by charging or discharging operation of battery with help of voltage control loop of bidirectional converter.

Bidirectional current

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DC/AC Inverters

A novel control approach for two-stage power converters in stand-alone solar photovoltaic system