IEEE Transactions on Power Electronics· 2015Q1· Review
DC Microgrids—Part II: A Review of Power Architectures, Applications, and Standardization Issues
- 1,409citations
- Q1SCImago
- 2015year
Short summary
DC microgrids offer higher reliability, efficiency, and simpler integration with renewables and storage compared to AC systems, making them increasingly important for smart grids.
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Key points
- DC microgrids offer advantages such as higher reliability, efficiency, and simpler integration with renewable energy sources and storage.
- The paper reviews practical design aspects, including power hardware topologies for smart grid applications.
- Protection of DC microgrids is challenging due to the inability of DC current arcs to extinguish naturally.
- Conflicting grounding objectives and standardization efforts for DC systems are also discussed.
AI-generated from the title and abstract; the full text is not read.
Abstract
DC microgrids (MGs) have been gaining a continually increasing interest over the past couple of years both in academia and industry. The advantages of dc distribution when compared to its ac counterpart are well known. The most important ones include higher reliability and efficiency, simpler control and natural interface with renewable energy sources, and electronic loads and energy storage systems. With rapid emergence of these components in modern power systems, the importance of dc in today's society is gradually being brought to a whole new level. A broad class of traditional dc distribution applications, such as traction, telecom, vehicular, and distributed power systems can be classified under dc MG framework and ongoing development, and expansion of the field is largely influenced by concepts used over there. This paper aims first to shed light on the practical design aspects of dc MG technology concerning typical power hardware topologies and their suitability for different emerging smart grid applications. Then, an overview of the state of the art in dc MG protection and grounding is provided. Owing to the fact that there is no zero-current crossing, an arc that appears upon breaking dc current cannot be extinguished naturally, making the protection of dc MGs a challenging problem. In relation with this, a comprehensive overview of protection schemes, which discusses both design of practical protective devices and their integration into overall protection systems, is provided. Closely coupled with protection, conflicting grounding objectives, e.g., minimization of stray current and common-mode voltage, are explained and several practical solutions are presented. Also, standardization efforts for dc systems are addressed. Finally, concluding remarks and important future research directions are pointed out.
The authors' abstract, as published at the source. IEEE Transactions on Power Electronics, 2015 · DOI ↗
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Field: Control and Systems Engineering
Control and Systems EngineeringEngineering