What are the requirements for a microgrid protection scheme?

The traditional protection scheme requirements include sensitivity , selectivity, and reliability. However, the capability of a microgrid to work in an islanded mode demands the additional requirement of adaptivity for the protection scheme.

Why is microgrid protection important?

However, it has several operational challenges such as power quality, power system instability, reliability, and protection issues. Microgrid protection strategy is a prime issue for the reliable operation of the microgrid. The microgrid protection scheme must meet the essential conditions for grid-connected and islanded operational modes.

How a dc microgrid should be standardized?

The protection devices such as DC circuit breakers, fuses and grounding equipment need to be standardized for the reliable fast and selective operation of the DC microgrid. In order to obtain fast response, identification and cleaning of fault should be in minimum time span by using ingenious methods and algorithms.

How can microgrid protection be coordinated?

Therefore, microgrid protection must be coordinated in both the grid-connected and islanded mode of operation. This could be done by the separate coordination study and settings of grid-connected and islanded mode protections or by providing sources of high fault current also in islanded mode.

How to protect a dc microgrid?

Different protection strategies for DC microgrid. 1. Calculate distance of the fault location using signal processing approach and impedance using Active Impedance Estimation method. To detect the fault location, transient part of current and voltage signal having high frequency is excerpted and send to the feeder.

What are the challenges in microgrid protection system?

Protection challenges in microgrid The framework of microgrid protection system should be meticulous, reliable and must have high speed and low-cost operation.