Abstract
A voltage balancer (VB) can be used to balance voltages under load unbalance in either a bipolar DC microgrid or LVDC (Low voltage DC) distribution system. An interleaved buck-type VB has advantages over other voltage balance topologies for reduction in output current ripple by an aspect of configuration of a physically symmetrical structure. Similarly, magnetic coupling such as winding two or more magnetic components into a single magnetic component can be selected to enhance the power density and dynamic response. In order to achieve these advantages in a VB, this paper proposes a VB with a coupled inductor (CI) as a substitute for inductors in a two-stage interleaved buck-type VB circuit. Based on patterns of switch poles under load variation, the variation in inductor currents under four switching patterns is induced. The proposed CI is derived from self-inductance based on the configuration structure that has a two-stage interleaved buck type and mathematical design results based on the coupling coefficient, where the coupling coefficient is a key factor in the determination of the dynamic response of the proposed VB in load variation. According to the results, a prototype scale is implemented to confirm the feasibility and effectiveness of the proposed VB.
Highlights
A microgrid system is an important eco-friendly distribution system that allows for high efficiency and flexible integration of distributed generations and energy storage systems [1]
The coupling coefficient is considered, which is determined based on the results of describing current variation, where the coupling coefficient is one of the factors that come from current dynamic response of the voltage balancer [17]
As determined based on the results of describing current variation, where the coupling coefficient is one highlighted in Section 1, the coupled inductor (CI) in this paper is adopted in a two-stage interleaved voltage balancer, of the factors that come from current dynamic response of the voltage balancer [17]
Summary
A microgrid system is an important eco-friendly distribution system that allows for high efficiency and flexible integration of distributed generations and energy storage systems [1]. The interleaved type of buck is selected based on highon power half-bridge mentioned above. The interleaved type of converter buck converter is selected based high density, current distribution, and dynamic response. As the stage of the interleaved topology suited to compensate drawbacks of the half-bridge type. The coupling coefficient is considered, which is determined based on the results of describing current variation, where the coupling coefficient is one of the factors that come from current dynamic response of the voltage balancer [17]. Thecircuit circuitconfiguration configurationofof early proposed voltage balancer (a) Half-bridge interleaved buck type
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
