Overview of Microgrid Technologies
Overview of Microgrid Technologies
Overview of Microgrid Technologies
I. INTRODUCTION
As the energy crisis and environmental issues have
become increasingly prominent, it has become the general
consensus of human society to develop low carbon economy
and construct ecological civilization to achieve sustainable
development. The development of clean and renewable energy
has become an important strategy of economic and social
sustainable development for all the countries in the world. In
order to coordinate the contradiction between grid and
distributed generation, and maximize the advantages of
distributed generation in economy, energy and environment,
the scholars put forward the concept of microgrid.
Microgrid combines distributed power, load, energy
storage devices and control devices, forming a single and
controllable power supply system. It can reduce the feeder
loss, and increase the reliability of local power supply and
improve energy efficiency. The United States, Europe, Japan
and many other countries combined with their reality and put
forward the concept of microgrid and actively carried out
relevant research. So far, microgrid has achieved fruitful
results in theory and application, and gradually develops in the
intelligent direction. It has become an integral part of smart
distribution grid and an important part of smart grid
construction.
II. THE PROPASAL OF MICROGRID
In recent years, environmental pollution, air quality and
other issues have become increasingly prominent, which have
a great relationship with the extensive use of fossil fuels. Coal,
oil are non-renewable resources and will be used up by
mankind one day. So, to develop and use renewable new clean
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B. Microgrid Research of EU
Taking into account the own needs of electricity market,
the security of power supply, and environmental protection,
Europe proposed a "Smart Grid" target in 2005, and
introduced the technical implementation of the program in
2006 [7]. As the 2020 and subsequent power development
goal of Europe, the program points out that the future power
grid should have the characteristics of flexible, accessible,
reliable and economic, etc. Currently, EU mainly finances
and promotes two microgrid projects: Microgrids and More
Microgrids, aiming to increase the penetration of micro
generation devices by expanding and developing the concept
of microgrid. Some basic theories of operation, control,
protection, security, and communication have been initially
formed, experimental platforms of different scale have been
established in Greece, Germany, and Spain [8].
The EUs Fifth Framework Programme (1998-2002)
funded the pioneering research of microgrid, forming a large
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In recent years, microgrid technology, as a more cuttingedge research field, is vigorously developed by American and
European countries with its characteristics of high reliability,
environmental protection, and flexibility. China's 863, 973
and other national key research development plans also started
to set up projects in order to encourage and support the
research on microgrid technology in various universities and
research institutes. In the next few years, the theoried and
related technologies of microgrid will be verified through
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