Microgrid Application Case Analysis

What is a microgrid?

The term “microgrid” refers to the concept of a small number of DERs connected to a single power subsystem. DERs include both renewable and /or conventional resources . The electric grid is no longer a one-way system from the 20th-century . A constellation of distributed energy technologies is paving the way for MGs , , .

What are the objectives of a microgrid?

Microgrids, such as the one in this case study (C1), need a clear objective, the definition of market participants, and the form of energy traded defined. Microgrids can pursue several, often conflicting objectives, such as the increase of the security of energy supply or the integration of local renewable generation into the energy supply system.

How is a microgrid evaluated?

The microgrid under consideration is evaluated from a techno-economic point of view utilising HOMER Pro software (version 3.7.6, Homer Energy LLC, Boulder, CO, USA), and specifically considering the Net Present Cost (NPC) as a metric to compare the various design options.

What is a physical microgrid?

A physical microgrid is a local power grid that can operate connected to the traditional grid or independently (island-mode). It adds the option of decoupling in case of grid instabilities or outages and ensures the energy supply for important facilities, such as hospitals. In island-mode operation, the physical microgrid relies on the existing generation within the microgrid.

What should the microgrid do in case of an emergency?

In case of emergency, such as a blackout condition, the microgrid should also be able to disconnect from the local power grid and provide all needed services in island mode. Table 7 indicates that the proposed model succeeds in this respect.

What is a microgrid connection (C2)?

The grid connection (C2) refers to the link between the traditional grid and the microgrid. It is well defined and currently used for balancing the microgrid’s supply and demand. However, the physical microgrid provides the option of decoupling in case of grid instabilities or outages, ensuring the energy supply for important facilities such as hospitals.