DC ready devices - Is redimensioning of the rectification components necessary?

“…Though designing a complete safety system for DC is difficult, other safety mechanisms like residual current detector and insulation resistance monitoring device guarantee the necessary safety and monitoring functions. The growth of DC distribution is constrained due to lack of higher current interrupting capacity of DC circuit breaker, protection schemes, and operational experience. However, expert research on fault detection and protection of DC distribution system has resulted in advanced protection schemes, which are capable of investigating different faults and prove to be effective for DC distribution system with distributed energy sources When DC distribution is carried out through underground cables in urban areas, corrosion is likely to be more compared with AC …”

Section: Challengesmentioning

confidence: 99%

“…However, expert research on fault detection and protection of DC distribution system has resulted in advanced protection schemes, which are capable of investigating different faults and prove to be effective for DC distribution system with distributed energy sources. [63][64][65][66] (iii) When DC distribution is carried out through underground cables in urban areas, corrosion is likely to be more compared with AC. 67 (iv) Though there are different arguments towards the voltage levels and standards, to reach a breakthrough, standardisation of voltage levels is an important step.…”

Section: Challengesmentioning

confidence: 99%

High-gain-high-power (HGHP) DC-DC converter for DC microgrid applications: Design and testing

Revathi

Prabhakar

González-Longatt

2017

Int Trans Electr Energ Syst

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Summary The use of green energy sources to feed direct current (DC) microgrids is gaining prominence over traditional centralised alternating current (AC) systems. Direct current microgrids are characterised by the use of intermediate DC‐DC converter, which acts as power conditioning units. Hence, the choice of an appropriate DC‐DC converter becomes significant as the overall system efficiency is strongly dependent on the converter's performance. This paper proposes a novel high‐gain–high‐power DC‐DC converter for DC microgrid, which is one of the significant steps forward in the development of DC microgrids. The suitability of the proposed high‐gain–high‐power DC‐DC converter is demonstrated by experimental tests of the 60 V/1.1 kV, 3 kW converter; test results validate the converter's suitability for DC distribution. A significant number of performance parameters of the proposed converter are compared with state‐of‐the‐art converter topologies demonstrating the superior capabilities of the proposed converter. This paper also portrays the potential benefits that could be reaped by trending towards DC instead of existing alternating current system. The advantages and challenges to be confronted in the foreseeable future while implementing sustainable DC microgrids are also highlighted. Finally, this paper encapsulates renewable energy fed DC microgrid system as an appropriate, technically feasible, economically viable, and competent solution for efficiently utilising the sustainable energy sources.

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“…Large volumes of ac consumers would also let play economics of scale for the early adopting dc consumers. Moreover, the costs of dc ready devices are not significantly higher than for ac only devices, as shown in [8].…”

Section: A Transition To a DC Systemmentioning

confidence: 99%