A microgrid is a localized grouping of electricity sources and loads i.e. it is a small-scale power grid that normally operates connected to the centralized grid but can also disconnect and function autonomously. This papers proposes a LabVIEW based Central Protection Center (CPC) that remotely monitors a grid-connected microgrid using a wireless medium. The microgrid is divided into zones for ease of monitoring. The CPC is capable of continuously capturing the current status of the grid in a zonalised manner. If a fault is diagnosed by the central protection center, then it issues appropriate overcurrent relay coordination to the microgrid network. © 2018 IEEE.

Krishna S

Department of Automotive Engineering

School of Mechanical Engineering

Vellore Campus

Gnana Swathika O V

Electrical

School of Electrical Engineering

Chennai Campus

Mendonca D

Arya R

Vellore Institute of Technology (VIT) is a private university located in&nbsp;Tamil Nadu, India. Founded in 1984, as Vellore Engineering College, the institution offers 20 undergraduate, 34 postgraduate, four integrated and four research programs. It has campuses in Vellore, Amravati, Bhopal and Chennai.

VIT is one of the top ranked private universities in India according to NIRF, THE and QS Rankings.&nbsp;Govt. of India has recognized&nbsp;VIT, Vellore as an&nbsp;Institution of Eminence. This has allowed VIT to take independent quality initiatives and move up in world ranking.

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VIT University

Wi-Fi Based Central Protection Center for Microgrids

2018 Second International Conference on Electronics, Communication and Aerospace Technology (ICECA)

Decentralization of electric power is possible with the penetration of distributed generators (DGs) in the microgrid (MG) network. Reconfiguration of MG poses a key challenge in identifying suitable protection schemes for varying the topology of the network. In this paper, a central protection center (CPC) is incorporated whose function is to monitor the MG continuously, identify fault occurrence, and locate the exact faulted branch. The proposed Prim-aided Dijkstra algorithm executed continuously in the CPC is responsible for identifying the current topology of the network and aids in identifying the shortest route from the faulted point to the nearest operating source. The CPC is also responsible for adaptively varying the settings of the relays existing in the shortest path identified based on their selectivity levels. This heuristic algorithm is validated on IEEE 21-bus and 40-bus MG test systems for all possible topologies and faults. The proposed algorithm is capable of clearing the fault by disconnecting minimum portion of the network and ensuring continuity of supply to a majority of loads. © 2013 IEEE.

IEEE Journal of Emerging and Selected Topics in Power Electronics

Prims-Aided Dijkstra Algorithm for Adaptive Protection in Microgrids

In this paper, a Field Programmable Gate Array (FPGA) based intelligent controller for overcurrent (OC) protection of a radial distribution system is realized. This controller monitors the radial distribution network continuously and when a fault is detected in the network, the FPGA based adaptive and intelligent controller performs the OC relay coordination and trips the appropriate circuit breakers of the system. The FPGA based digital prototype relay for overcurrent protection is realized with Atlys Digilent Spartan-6 FPGA kit. The performance of the FPGA based overcurrent protection technique for a 4-bus radial distribution system is compared with that of the conventional dual simplex algorithm. The proposed FPGA based overcurrent protection algorithm is also tested for an IEEE 33-bus radial distribution network. © Springer International Publishing Switzerland 2016.

Lecture Notes in Electrical Engineering Advanced Computer and Communication Engineering Technology

Adaptive and Intelligent Controller for Protection in Radial Distribution System

This paper presents Big-M method and Dual Simplex method for optimum time coordination of over current relays in a distribution network. These methods are used to find the optimized values of time multiplier settings (TMS) of relays using linear programming problem (LPP). Objective function contains artificial variables in Big-M method. Dual simplex gives the optimum solution without introducing any artificial variables. Over current (OC) relay plays a major role in power distribution system. It protects electrical power systems against excessive current which are caused by faults like short circuits, ground faults, etc. The fault is cleared within a least possible time. Big-M and Dual simplex technique are presented in this paper for optimum time coordination of OC relays in a radial fed distribution system. © 2015 IEEE.

2015 International Conference on Computational Intelligence and Communication Networks (CICN)

Optimum Coordination of Overcurrent Relays in Distribution Systems Using Big-M and Dual Simplex Methods

Protection system includes a series of devices whose main purpose is to protect people and primary electric power equipment from the effects of faults. Fault currents cause damage to equipment and are also hazardous to personnel. Thus, there should be a primary and a backup system with proper time grading between systems, i.e. Tripping time should be maximum for the point farthest from the fault location. Over current (OC) relays are used as backup protection against these faults. The coordination time interval must be maintained among relays during faults. Various algorithms are used to optimize the time of operation of these OC relays. This paper implements Dual Simplex and Genetic Algorithms (GA) on a radial network and identifies the time multiplier setting (TMS) of the relay. This facilitates in achieving suitable OC relay coordination of the network. © 2015 IEEE.

Optimum Coordination of Overcurrent Relays Using Dual Simplex and Genetic Algorithms

An intelligent micro grid controller system with over current protection capability in both the grid-connected and the islanded modes of operation is proposed. To achieve the above strategy a model of small portion of distribution network as if it were a micro grid will be developed and considered. The processor based relays that provide over current protection functions in addition to performing control, measurement, and communication functions will be suitably employed. © 2015 IEEE.

Journal	Data powered by Typeset2018 Second International Conference on Electronics, Communication and Aerospace Technology (ICECA)
Publisher	Data powered by TypesetIEEE
Open Access	0