Photovoltaic AC DC Microgrid

Are DC microgrids the future of power system?

But the variable nature of distributed energy resources and variable load profiles (AC/DC loads) leads to voltage deviation in DC microgrid. With bus voltage control, DC microgrid can be operated very efficiently and smoothly than the conventional AC grids. Therefore, DC microgrids are considered to be the future of the power system.

What is dc microgrid?

Some of the renewable energy sources such as solar and fuel cells produce DC power which is suitable for most of the existing equipment and devices such as computers, phones, LED lamps, and even electric vehicles work on DC power, DC microgrid presents itself as a more feasible alternative over AC microgrid.

What are hybrid AC/DC microgrids?

Microgrids, especially hybrid AC/DC microgrids, have emerged as intelligent micro-power systems that maximize the advantages of DG. They integrate various types of distributed energy sources, energy storage systems, loads, controls, and various protection measures .

How can IC Control a hybrid ac/dc microgrid?

To increase the dynamic stability, a comprehensive control scheme based on two regulator loops able to control the frequency and DC voltage is suggested for IC control of hybrid AC/DC microgrid . A nonlinear load harmonic suppression in islanded microgrid can be realized by virtual synchronous generator as discussed in .

What is the difference between DC and AC microgrid?

Practically, major power quality issues in DC microgrid are voltage fluctuations and harmonics whereas AC microgrid has the problems of voltage fluctuations, unbalances and harmonics. This is also the area where extensive research is needed.

How can a hybrid microgrid withstand power fluctuations?

Using a decentralized droop control scheme, power management of hybrid microgrid with several sub-microgrids can be accomplished as discussed in . Three-port interlinking converters with a decentralized power management approach allow hybrid microgrids to withstand power fluctuations as discussed in .