Overview of microgrid systems (original) (raw)

Design, Issues and Protection of Microgrid

2020

This paper demonstrates the Design, Modelling and Simulation of the Micro grid as contemporary project where it delivers the power based on load requirement. For different type of loads the paper reflects the usage of the renewable energy resources taken into consideration. Here various energy delivering and storage criteria for Micro grid has been designed with the aspect of continuously sourcing the power during any circumstances. Photovoltaics which has less efficiency is boosted with MPPT Technique and Battery Energy Storage System which is designed with Bidirectional DC-DC Converter for controlling the charging and discharging based on load plays a vital role in the integration with the Utility grid. The power to intermediate levels is being supplied taking into the concern of power quality issues and suitable protection scheme is adopted to clear the Faults that is occurring within the system. For Fault clearance the algorithm for tripping action of circuit breaker is develope...

A Comprehensive Study on Microgrid Technology

International Journal of Renewable Energy Research, 2014

Grid connection capability of distributed generation attracts researchers due to the cumulative demand for electricity and environment pollution concern as a new emerging technology for providing reliable and clean power supply. A microgrid comprises distributed generation, energy storage, loads, and a control system that is capable of operating in grid-tied mode and/or islanded mode. As operation modes are shifted, the microgrid should successfully manage the voltage and frequency adjustment in order to protect the grid and any loads connected to the system. Facilitation of the generation-side and load-side management and the resynchronization process is required. This paper presents an overall description and typical distributed generation technology of a microgrid. It also adds a comprehensive study on energy storage devices, microgrid loads, interfaced distributed energy resources (DER), power electronic interface modules and the interconnection of multiple microgrids. Details o...

Planning and protection of DC microgrid: A critical review on recent developments

Engineering Science and Technology, an International Journal, 2023

Nowadays, direct current (DC) microgrid is gaining importance due to the wide utilization of DC loads, integration of solar photovoltaic (PV) and energy storage devices, and no frequency and reactive power control issues. However, planning and protection of such microgrid are complicated due to the connection of several distributed generators (DGs), loads, utility grids, and energy storage systems (ESSs) to the DC bus with power electronic converters. Hitherto, the protection of DC microgrid has not drawn sufficient attention due to the high cost and immature protective devices for DC faults. Furthermore, the reliability of DC microgrid highly depends on proper planning, protection, and power-sharing among the DGs, ESSs, and utility grids. Thus, this article provides a critical summary of two main aspects of DC microgrids, such as protection and planning. Since the mentioned aspects are mutually dependent, a discussion of an aggregated point of view is included. The advantages and disadvantages of different protection and planning approaches are well documented. The possible improvements of existing protection and planning methods are outlined. The key research areas are identified, and future research directions are mentioned so that cutting-edge technologies can be adopted, making the review article unique compared to the existing reviews. The article could be an excellent foundation and guidance for industry personnel, researchers, and academicians.

IJERT-Design, Issues and Protection of Microgrid

International Journal of Engineering Research and Technology (IJERT), 2020

https://www.ijert.org/design-issues-and-protection-of-microgrid https://www.ijert.org/research/design-issues-and-protection-of-microgrid-IJERTCONV8IS11031.pdf This paper demonstrates the Design, Modelling and Simulation of the Micro grid as contemporary project where it delivers the power based on load requirement. For different type of loads the paper reflects the usage of the renewable energy resources taken into consideration. Here various energy delivering and storage criteria for Micro grid has been designed with the aspect of continuously sourcing the power during any circumstances. Photovoltaics which has less efficiency is boosted with MPPT Technique and Battery Energy Storage System which is designed with Bidirectional DC-DC Converter for controlling the charging and discharging based on load plays a vital role in the integration with the Utility grid. The power to intermediate levels is being supplied taking into the concern of power quality issues and suitable protection scheme is adopted to clear the Faults that is occurring within the system. For Fault clearance the algorithm for tripping action of circuit breaker is developed and Fault impedance is being calculated on analyses of scope results.

Microgrid systems: Current status and challenges

2010 IEEE/PES Transmission and Distribution Conference and Exposition: Latin America (T&D-LA), 2010

The objective of this paper is to present the current status and state-of-the-art of microgrid systems as well as the barriers that are being encountered for their integration to the network. The expectation about the microgrid performance is high, thus, issues related to the microgrid standards, autonomous operation, control strategies, regulatory barriers as well as its protection and islanding operation, among other aspects, will be discussed herein. Some examples of practical installations worldwide will also be presented.

Investigations on Issues in Microgrids

Journal of Clean Energy Technologies, 2017

This paper presents many technical issues and shortcomings confronted in installation of micro-grids particularly in rural areas. It discusses the technical challenges involved in grid integration of micro-grids and highlights some aspects of stability in micro-grids. There are different types of micro-grid applications. The system layout and the control design vary depending on the application and so does the facet of stability in a micro-grid. It briefly encompasses the stability aspects of remote, utility connected micro-grids depending on the modes of operation, control topology, types of renewables and the network parameters. In the end, a brief insight into IEC 62257 specifications has been given.

overview of microgrid technology

The purpose of this research paper is present of overview of microgrid (MG) system. This paper demonstrate the techniques of energy generation through renewable energy sources (RES) such as solar, wind, geo thermal, bio mass and conventional power generation methods for micro grid system. It also review the control system, protection system and energy storage methods used in micro grid system. Moreover, the article deals with the key issues present in generation and storage. Furthermore, new developments in the fields of micro grid are also addressed in this paper.

A Review: DC Microgrid Control and Energy Management System

Continuously increasing demand of microgrid with high penetration of distributed energy generators, specially focused on renewable energy sources is modifying the traditional structure of the electric distribution grid. In addition, DC microgrids diverted the attention of researchers and power electronics industry in recent years to stimulate renewable energy technologies (RETs) and distributed energy resources (DERs) deployment and encouraging technological innovation to reduce green house gas (GHG) emission and achieve energy security and independence to meet the growing electricity demand. So for many studies have been done on successful integration of RETs and DERs, operation and control, protection and stability issues, simultaneously and satisfactorily implemented during feasible operation of microgrid. Studies show that DC transmittable power can increase the system efficiency up to 10% as compared to AC. But still DC bus voltage fluctuation, power quality and flow during the...

A Review on DC Microgrid and Decentralized Approach

IJRASET, 2021

DC Microgrid is going to be a very important part of the Distribution system soon. The given circumstances have forced us to find how to utilize renewable energy sources in the integration to increase its reliability in our day-today life. This paper gives a good idea of the DC Microgrid and various methods being used for the controlling part of it. As day by day cost incurred in renewable energy generation is decreasing, we need to find out significant parts where this kind of DC Microgrid can be utilized to provide electricity in all parts of the country.

Introduction, Status and Challenges to MICROGRID : A Review Paper

Microgrids are becoming increasingly attractive to consumers and as such in the future, a great number of them will be installed at consumer’s sites. Micro grid system is formed to provide reliable electricity and heat delivering services by connecting distributed generations and loads together within a small area. Micro grids can cause several technical problems in its operation and control when operated as autonomous systems. This paper is a review of three technical challenges on micro grid with respect to voltage and frequency control, islanding and protection of microgrids. This paper is also a review of different topologies for operation of microgrids. The focus of the paper is centered around the encountered and foreseen issues, enabling technologies and economics for encouraging the deployment of microgrids in India