|Title:||Power conversion techniques for energy storage systems|
Electric current converters.
Hong Kong Polytechnic University -- Dissertations
|Department:||Faculty of Engineering|
|Pages:||xvii, 99 leaves : ill. (some col.) ; 30 cm.|
|Abstract:||Energy storage systems (ESS) are becoming essential in future power applications, such as automobile applications, renewable generation systems and uninterruptable power supply (UPS). In an energy storage system, bidirectional DC-DC converter (BDC) is one of the key components to interface the DC bus and energy storage devices. Growing applications of ESS call for more and more advanced power conversion techniques. A comprehensive review of bidirectional topologies and soft switching techniques is presented at the beginning of this dissertation. Among the popular bidirectional topologies, phase-shift controlled Dual Active Bridge (DAB) converters are available with galvanic isolation, low components stresses, constant switching frequency operation, inherent zero-voltage switching (ZVS), low number of passive components and easy implementation. Therefore, DAB is very suitable for high-power and high-voltage applications. By using low on-state resistance MOSFETs on the low-voltage side, high efficiency is still achievable for low-power or low-voltage applications. However, the design of DAB is not straightforward. The rest of this dissertation intends to conduct a comprehensive study of DAB, including DC characteristics, ZVS conditions, small-signal modeling, closed-loop control design and implementation. To verify the theoretical analysis, the DAB is simulated by using Saber. A prototype of DAB is built and tested. A novel control configuration is proposed to implement bidirectional power flow. The design utilizes two phase-shift controllers, which are alternatively working to control the corresponding direction of power. Experiment results demonstrate that the proposed configuration can effectively control the bidirectional power flow.|
|Rights:||All rights reserved|
Files in This Item:
|b26795334.pdf||For All Users (off-campus access for PolyU Staff & Students only)||3.85 MB||Adobe PDF||View/Open|
As a bona fide Library user, I declare that:
- I will abide by the rules and legal ordinances governing copyright regarding the use of the Database.
- I will use the Database for the purpose of my research or private study only and not for circulation or further reproduction or any other purpose.
- I agree to indemnify and hold the University harmless from and against any loss, damage, cost, liability or expenses arising from copyright infringement or unauthorized usage.
By downloading any item(s) listed above, you acknowledge that you have read and understood the copyright undertaking as stated above, and agree to be bound by all of its terms.
Please use this identifier to cite or link to this item: