Title :
A Bi-Directional Buck/Boost Voltage Balancer for DC Distribution System
Author :
Chi Zhang ; Daozhuo Jiang ; Huan Zheng ; Lixin Ye
Author_Institution :
Zhejiang Univ., Hangzhou, China
Abstract :
A bi-directional Buck/Boost voltage balancer required in DC distribution system is proposed in this paper. Compared with the existing voltage balancer, the proposed balancer is unique in adding a bi-directional Buck/Boost converter, so that it cannot only balance the positive and negative rail voltages of the load side, but also regulate the total load voltage for fluctuating supply voltage. Theoretical analysis is performed to establish the model of this bidirectional Buck/Boost voltage balancer. For meeting the characteristic of the proposed voltage balancer, based on the complementary PWM method the control strategy has been proposed and analyzed. And the simulations have been carried out to verify the validity of the circuit topology.
Keywords :
PWM power convertors; distribution networks; power control; state-space methods; voltage control; DC distribution system; PWM method; bidirectional buck boost voltage balancer; circuit topology; control strategy; fluctuating supply voltage; load side; negative rail voltages; positive rail voltages; total load voltage regulation; Analytical models; Bidirectional control; Load modeling; Pulse width modulation; Rails; Voltage control; Voltage fluctuations; Bi-directional Buck/Boost converter; DC distribution; complementary pulse width modulation (PWM) control; load unbalancr; voltage balancer;
Conference_Titel :
Digital Manufacturing and Automation (ICDMA), 2013 Fourth International Conference on
Conference_Location :
Qingdao
DOI :
10.1109/ICDMA.2013.3
