Abstract
Microgrids are being developed as a building block for future smart grid system. Key issues for the control and operation of microgrid include integration technologies and energy management schemes. This paper presents an overview of grid integration and energy management strategies of microgrids. It covers a review of power electronics interface topologies for different types of distributed generation (DG) units in a microgrid, a discussion of energy management strategies, as well as the DG interfacing converter control schemes. Considering the intermittent nature of many renewable energy based DG units, the ancillary services of DGs using the available interfacing converter rating are also discussed in the paper.
Highlights
In recent years, the rapid increase of distributed generation (DG) installation, especially those based on renewable energy sources, is expected to address the concerns on greenhouse gas emissions, energy sustainability, energyCrossCheck date: 9 June 2014A common feature of the renewable energy based or micro sources based DG systems is the power electronics interfaces that required to convert the energy sources output to the grid ready voltages [4]
This paper presents an overview of grid integration technologies and energy management schemes of microgrids
Microgrid is becoming an important aspect of future smart grid, which features great control flexibility, improved reliability, and better power quality
Summary
A common feature of the renewable energy based or micro sources based DG systems is the power electronics interfaces that required to convert the energy sources output to the grid ready voltages [4] These power electronics provide enhanced flexibility for the DG operation and energy management. To achieve improved power quality in a microgrid, proper design and control of the DG interfacing converters to provide the ancillary services are important. This is true when considering that most renewable energy based DG systems are not always operating at their rated power, and the available converter rating can be used to facilitate grid frequency and voltage regulation, harmonics control, unbalance voltage compensation, etc. Ancillary services of DG systems and microgrids for grid support and power quality improvement are presented
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