There is currently a great interest in the application of micro-grids to help support the grid, especially for critical loads.
There are research projects in Europe, Japan and the United States of America which are being used to evaluate technologies and learn how to optimise the concept of a micro-grid.
The term “micro-grid” can encompass many derivations depending on the application. For instance, a large facility such as a hospital may operate a micro-grid in order to have security of electrical supply. An off-grid, remote site such as a mining facility may operate a micro-grid as the sole source of power for the facility. Similarly, a ship application may be considered as a special micro-grid for marine applications. Another example is that of a community micro-grid, which may export renewable power into the grid and which has the capability of going “off grid”.
The article in the IEEE SmartGrid publication by Kevin P. Schneider introduces the concept of the Smart Power Infrastructure Demonstration for Energy Reliability and Security (SPIDERS).
There are descriptions of three operational demonstrations of micro-grids. The micro-grid applications are for mission critical, military facilities in the United States of America. The demonstrations are scheduled to finish in 2015.There are high-level requirements:
For each demonstration, an Integrated Assessment Plan (IAP) and a utility assessment report is to be developed. The Integrated Assessment Plan is further divided into six Measures of Effectiveness (MOEs):
Within each of the six measures, there are further Measures of Performance (MOPs) which correlate to specific measurements.
It is interesting to observe the structure of the evaluation process for each demonstration, with four high-level requirements, an Integrated Assessment Plan (IAP), six Measures of Effectiveness (MOEs) and further Measures of Performance.The question is what is the evaluation process which is to be used for your micro-grid application? BESST is able to provide evaluation structures and design the power and control systems for your micro-grid.