Seyed Sajjad  Hosseini, Hesam  Rahbarimagham, 
    Designing a Backup Control System for Micro-Grids during Fault Condition,
    International Journal of System Signal Control and Engineering Application,
    Volume 9,Issue 5,
    2016,
    Pages 121-132,
    ISSN 1997-5422,
    ijssceapp.2016.121.132,
    (https://makhillpublications.co/view-article.php?doi=ijssceapp.2016.121.132)
    Abstract: Now a days increased presence of distributed generations in distribution systems has created a new
structure namely as micro-grids which include several advantages such as responsiveness towards energy
demands, reliability, reduced offline times, increased efficiency and environment related arguments. Micro-grids
are usually found in two types including network connected and network independent. A micro-grid’s suitable
performance is in debt of existence of an efficient control system since the issue of stability is considered as
a crucial parameter in terms of energy management and planning in grids and micro-grids. An important
component in terms of controlling micro-grids in network independent mode is micro-grid’s voltage and
frequency controlling. There are several strategies for doing so but the most important one is the droop method.
The present study tries to benefit from a PID fuzzy controller for optimal management of behavior of the backup
control system aimed at controlling the micro-grid during fault condition. Data analyses and related simulations
have been performed using the matlab Software. Results regarding the PID fuzzy controller revealed a higher
precision and speed in terms of neutralization of the fault compared to previous methods. The proposed
controller overcomes the complexities of previous methods such as using a decision making tree. In fact the
proposed controller is simpler than previous ones but yet more precise and faster.
    Keywords: Distributed generations;PID fuzzy;micro-grid;fuzzy logic controller;V/F controller;droop method;energy saving batteries