A Reduced Data Transfer Scheme in Distributed Secondary Control of Microgrid Using Aperiodic Sampling Method
Subject Areas : electrical and computer engineeringMohyedin Ganjian-Abukheili 1 , مجید شهابی 2 , Qobad Shafiee 3
1 -
2 - Babol Noshirvani University of Technology
3 -
Keywords: Aperiodic data transferconsensus algorithmdistributed secondary controlmicrogrid,
Abstract :
The steady state error in voltage amplitude and frequency and improper reactive power sharing are main disadvantages of droop control in primary level of control of distributed resources (DERs) in microgrid. Secondary control can compensate these problems. In contrary to centralize control, distributed secondary control may bring merits such as reliability, flexibility and scalability improvement. The distributed secondary control is usually implemented using consensus algorithm whose communication network is very important. Communication network is usually modeled continuously with a constant transfer rate. In this paper, the consensus algorithm with communication network are implemented in discrete domain because of discrete nature of them. Two aperiodic data transfer strategies state dependent and state independent are also proposed for releasing communication network burden where data rate is not fixed. Time delay as a non-desirable effect is evaluated. The proposed method applied on an islanded microgrid, and simulation results show the effectiveness of the proposed method.
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