Mitigation of Voltage Unbalances in Bipolar DC Microgrids Using Three-Port Multidirectional DC-DC Converters

Taha Ahmadi; Esmaeel Rokrok; Mohsen Hamzeh

Mitigation of Voltage Unbalances in Bipolar DC Microgrids Using Three-Port Multidirectional DC-DC Converters

Taha Ahmadi

Esmaeel Rokrok

Mohsen Hamzeh

Vol. 18, No. 4, pp. 1223-1234, Jul. 2018

10.6113/JPE.2018.18.4.1223

Bipolar DC microgrid

Line voltage unbalance rate

Multidirectional converters

Three-port converters (TPCs)

Voltage balancer

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Abstract

In this paper, a new three-port multidirectional DC-DC converter is proposed for integrating an energy storage system (ESS) to a bipolar DC microgrid (BPDCMG). The proposed converter provides a voltage-balancing function for the BPDCMG and adjusts the charge of the ESS. Thanks to the multi-functional operation of the proposed converter, the conversion stages of the system are reduced. In addition, the efficiency and weight of the system are improved. Therefore, this converter has a significant capability when it comes to use in portable BPDCMGs such as electric DC ships. The converter modes are analyzed and small-signal models of the converter in each of the independent modes are extracted. Finally, comprehensive simulation studies are carried out and a BPDCMG laboratory prototype is implemented in order to verify the performance of the proposed voltage balancer using the burst mode control scheme.

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Cite this article

[IEEE Style]

T. Ahmadi, E. Rokrok, M. Hamzeh, "Mitigation of Voltage Unbalances in Bipolar DC Microgrids Using Three-Port Multidirectional DC-DC Converters," Journal of Power Electronics, vol. 18, no. 4, pp. 1223-1234, 2018. DOI: 10.6113/JPE.2018.18.4.1223.

[ACM Style]

Taha Ahmadi, Esmaeel Rokrok, and Mohsen Hamzeh. 2018. Mitigation of Voltage Unbalances in Bipolar DC Microgrids Using Three-Port Multidirectional DC-DC Converters. Journal of Power Electronics, 18, 4, (2018), 1223-1234. DOI: 10.6113/JPE.2018.18.4.1223.