Abstract
The ±270 V bipolar dc distribution has become an attractive power supply scheme in more electric aircraft (MEA). In this paper, a dc voltage balancing strategy based on zero vector redistribution (ZVR) is proposed for a three-phase coupled inductor-based bipolar-output active rectifier (TCIBAR) to achieve balanced ±270 V power supply for MEAs. First, the mathematical model of the TCIBAR is developed in the rotating reference frame and the zero-sequence equivalent circuit of the three-phase coupled inductor (TCI) branch is derived. On this basis, the effect mechanism of the zero-sequence voltage is analyzed in balancing the output dc voltages of the TCIBAR. Second, a voltage balancing control scheme is designed to control the zero-sequence voltage and maintain the dc voltage balance of the TCIBAR under unbalanced load condition. Finally, a ZVR - space vector pulse width modulation (ZVR-SVPWM) method is proposed. With the ZVR-SVPWM method, the duration time of zero vectors can be redistributed to modulate the desired zero-sequence voltage for the TCIBAR. The proposed dc voltage balancing strategy for the TCIBAR is implemented on an experimental platform, and the experimental results verify the feasibility and effectiveness of the proposed control scheme and ZVR-SVPWM method.
Highlights
With the rapid development of power electronics in recent years, significant progress has been made in the research of electric power system (EPS) for more electric aircraft (MEA) [1]–[3]
With the proposed dc voltage balancing control scheme based on zero vector redistribution (ZVR), the total zero-sequence current of the three-phase coupled inductor (TCI) is controlled to be almost equal to the load current difference in[5 A/div] ip[5 A/div]
This paper proposes a dc voltage balancing strategy based on ZVR for the three-phase coupled inductor-based bipolar-output active rectifier (TCIBAR) to generate balanced ±270 V bipolar power supply for MEAs
Summary
With the rapid development of power electronics in recent years, significant progress has been made in the research of electric power system (EPS) for more electric aircraft (MEA) [1]–[3]. In order to withstand the dc offset voltage caused by the series connection, a transformer with two secondary windings is required in this topology This system structure has the disadvantage of high complexity and heavy weight, and it is not suitable for MEAs. An improved solution is to employ a PWM rectifier along with a voltage balancer [21]–[23]. A three-phase coupled inductor-based bipolar-output active rectifier (TCIBAR) has been proposed to establish the bipolar dc distribution system in decentralized power grids [24], [25]. A voltage balancing control scheme based on zero vector redistribution (ZVR) is proposed to achieve balanced ±270 V output voltages of the TCIBAR.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
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
