Are DC microgrids safe?

The DC microgrid has become a typical distribution network due to its excellent performance. However, a well-designed protection scheme still remains a challenge for DC microgrids.

Are there research gaps on dc microgrid protection?

The study here is only limited to DC microgrid protection issues and available protection schemes. The study is focussed on the shortcomings of various DC microgrid protection schemes, latest technological developments, and identifies research gaps on DC microgrid protection through an up to date literature survey.

What are the challenges of dc microgrid protection?

In this paper, the challenges of DC microgrid protection are investigated from various aspects including, dc fault current characteristics, ground systems, fault detection methods, protective devices, and fault location methods. In each part, a comprehensive review has been carried out.

Are dc microgrid protection schemes based on grid parameters?

Most of the microgrid protection schemes are used the grid parameters (such as current, voltage, frequency etc.) separately, i.e., either current or voltage or frequency, not all together. 7. Future directions Several protection strategies are reviewed in this paper to highlight the present status of DC microgrid protection schemes.

Do DC microgrids need a well-designed protection scheme?

However, a well-designed protection scheme still remains a challenge for DC microgrids. At present, researches on DC microgrids primarily focus on the topology structure, control method and energy control, while researches on fault analysis, detection and isolation have not drawn enough attention.

How to protect microgrids?

Modern digital protection devices (like PMU & IDM based protection devices, DC circuit breakers etc.) need to be introduced in microgrids. For real-time and continuous monitoring and data collection from the grids IoT (Internet of Things) based approaches can apply in the protection schemes.