Sensorless Link Voltage Control in Bidirectional Power Flow Controller for Next-Generation DC Power Network

This paper proposes a sensorless link voltage control method for bidirectional power flow controller for next-generation DC power network. In our previous works, we studied methods to keep the link voltage at a constant value. The methods were implemented based on feedback of the measured link voltage values. It therefore needs additional costs for measuring equipment of the link voltage. In this paper, we propose a link voltage control method that does not use the measured link voltage value, and enables to keep the link voltage certainly higher than the node voltages. The method well simplifies the implementation and reduces the costs. The effectiveness of the proposed method is verified by experimental results.