Management of multiple energy storage devices in a DC microgrid is a challenge. Conventional method, such as droop control, cannot ensure accurate current sharing in coordinating multiple battery banks, which limits the DC microgrid system performance. This paper proposed an active DC bus signaling (ADBS) method to coordinate multiple battery banks in a DC microgrid. It has the advantages of accurate current sharing. Using the proposed ADBS method, the master controller can collect State of charge (SoC) of each slave battery bank by actively varying the DC bus voltage levels and monitoring the current change. The master module then sets a working voltage level after decision-making. The proposed method was experimentally evaluated, and the experimental results show that all the possible working voltage levels can be reached and the accuracy of current sharing is guaranteed.
|Title of host publication||2017 Second IEEE International Conference on DC Microgrids (ICDCM)|
|Number of pages||6|
|Publication status||Published - 3 Aug 2017|
|Event||2nd IEEE International Conference on Direct Current Microgrids, ICDCM 2017 - Nurnberg, Germany|
Duration: 27 Jun 2017 → 29 Jun 2017
|Conference||2nd IEEE International Conference on Direct Current Microgrids, ICDCM 2017|
|Period||27/06/17 → 29/06/17|
Bibliographical note© 2017 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
- DC microgrid
- control strategy
- DC bus signaling
- multiple energy storage devices