IMPLEMENTATION OF NANOGRIDS FOR FUTURE POWER SYSTEM

In this paper, Nanogrid System and working is presented for the future sustainable power system. This system is for small scale for smart homes with decentralized power system. A Nanogrid is the combination of energy system such as using of sources such as solar cells, fuel cells, micro turbines, wind turbines, energy storage devices and AC, DC power systems and controllable loads. This grid may use single mode or island mode with soft switching. The Dynamic of power system capability increases reliability, in case if one system fails it switch to other system to continue proving electric power with losing quality. The energy storage system is used to maintain stability during transition between the operating modes is emphasized. The Simulink model is used to present the working of system.

-The use of renewable energy is essential to reduce the consumption of final energy used in the residential and tertiary sectors. For their effective integration in buildings, the main obstacles to be overcome are the design of multi-source systems (where renewable sources coexist with conventional sources), their design and their control-command. The objective is to obtain an optimal system from an economic and energy point of view. Because of the spread of the use of renewable energy to achieve energy self-sufficiency in remote areas, microgrids can lead to sustainable development of clean power systems but they pose challenges to a reliable energy supply because of its intermittent nature. This article presents a microgrid model including a PV. The purpose of the energy management system (EMS) is to provide a reliable and optimal generation from multiple sources in the microgrid. The idea is based on exchanging intermittent energy between the houses of a local community. Each house is equipped with an AC nanogrid including photovoltaic panels. These nanogrids are equipped with a network controller that the power can be exchanged between the houses on an external AC power bus. In this way, the fluctuations in response to demand are absorbed between nanogrid to improve reliability, energy management and complementarity nanogrids.

2014 Australasian Universities Power Engineering Conference (AUPEC), 2014

A hybrid AC-DC nanogrid (NG) can be considered as the power supply system for future community houses. In this paper, the operation and control of a NG are presented. The NG consists of an AC bus and a DC bus, interconnected through a tie-converter. Each bus may have several loads and micro sources. The NG should have an adequate generation capacity to supply its loads in off-grid mode as well as the capability of exchanging power with the utility grid. The tie-converter exchanges the power between two buses and regulates bus voltage in both buses in the case of off-grid operation. Several case studies are presented using PSCAD/EMTDC to verify the NG dynamics.

2020

Supervisor:Yuto LIMGraduate School of Advanced Science and TechnologyMaster of Science (Information Science

Energies, 2021

Distributed generation (DG) systems are growing in number, diversifying in driving technologies and providing substantial energy quantities in covering the energy needs of the interconnected system in an optimal way. This evolution of technologies is a response to the needs of the energy transition to a low carbon economy. A nanogrid is dependent on local resources through appropriate DG, confined within the boundaries of an energy domain not exceeding 100 kW of power. It can be a single building that is equipped with a local electricity generation to fulfil the building’s load consumption requirements, it is electrically interconnected with the external power system and it can optionally be equipped with a storage system. It is, however, mandatory that a nanogrid is equipped with a controller for optimisation of the production/consumption curves. This study presents design consideretions for nanogrids and the design of a nanogrid system consisting of a 40 kWp photovoltaic (PV) syst...

International journal of engineering research and technology, 2021

The concept of nanogrid is relatively new and compelling. It arose from the need to enable "plug-and-play" integration of locally generated renewable energy. A nanogrid refers to a small microgrid, typically serving a single building or a single load. While microgrids are building blocks of a smart-grid, nanogrids are building cells of a microgrid. Due to their simplicity, the technology requirements for nanogrids are less complex than those for microgrids and they face less technical and regulatory barriers. This paper provides a brief introduction to nanogrid.

Renewable & Sustainable Energy Reviews, 2017

The centralised power grid bears a heavy burden in a time when consumers expect an uninterrupted reliable power supply, a reduction in carbon emissions, increased efficiency within the national grid and power supplied to remote communities. As expectations increase, it becomes the task of power systems research and design to develop new structures to meet these demands. This has led to alternatives being sought for centralised power generation, which is prone to outages (due to long distance transmission), is a substantial contributor to global carbon emissions, has large transmission losses and is often not a practical solution when supplying remote communities. Distributed generation (DG) looks to remedy these inadequacies by producing power close to its point of consumption, often utilising carbon neutral, renewable energy (RE) sources (sun, wind). To maximise the efficient use of DG, control structures are used to balance the intermittent RE power production with consumer power consumption. One such structure is used to implement control of small scale DG, at a single house/small building level: the nanogrid. This paper explores the current nanogrid research, it collates the existing definitions and uses the knowledge to give a concise definition of a nanogrid. It then discusses the control topologies and techniques which enable the intelligent control of the nanogrid, before presenting the hardware platform used to ensure the efficient operation of a small scale DG system. The paper then considers the interconnection of multiple nanogrids forming a network (microgrid), facilitating the sharing of power between individual nanogrids. The future developments are then explored before the paper's conclusions are presented.

International journal of engineering research and technology, 2018

Microgrids are small scale version of the power grid in which distributed energy resources, storage devices and loads are localized in a defined geographical area. A microgrid offers an alternate solution to the grid stress problem. Microgrids are building blocks of the Smart Electrical Grid. Microgrids can be operated in grid tied and islanded mode. Power quality is a very important issue in a microgrid because it directly affects the operation of a microgrid. In this paper operational behavior of microgrid under various modes and loading conditions has been studied. Various issues and challenges are presented. Multi loop Control structure has been employed for the controller design to improve the performance of the microgrid. The purpose of this research work is to understand the dynamics of microgrid in grid tied and islanded mode to ensure reliable and secure operation. Simulation results for various conditions are performed to evaluate the performance of microgrid. It is shown ...

Research Trends and Challenges in Smart Grids [Working Title], 2019

A microgrid has a group of electrical generation and various types of loads operated as single controllable power system. Microgrid is a best option for configuration of recent model power grids. Microgrids are capable of work in parallel with the existing grid as well as off grid as isolated mode. The microgrid enables the grid connection as either AC grid or DC grid and it provides connections of variable AC and DC sources with loads. Microgrid has modeled such a way that it avoids multiple reverse connections. Power electronic devices such as converters and inverters are ensures safe operation and control of the microgrid. The proper modeling and simulation results ensure the successful implementation of microgrid. The challenges involved in implementation and the modeling of AC/DC and hybrid grid in the tied mode have been discussed. The simulation modeling of the microgrid in MATLAB/SIMULINK platform is explained with neat circuit diagram. This chapter provides the readers complete and comprehensive overview about microgrids and their different modes of operations.

The term "Smart Grid" can be described as technology innovation that people are utilizing to bring utility electricity distribution and consumption system into the modern era, by increased use of information technology, communications and automation. Micro-grid can be referred to as a small scale power gird that operates independently grid in combination with the main electrical grid. A microgrid control system allows an orchestration of generation, storage, load and demand for energy. Microgrid can make application of smart grid much easier with great improved reliability. Smart microgrid is an ideal way to incorporate the variable renewable energy sources at a local level. Some advantages include reliability, cost reduction and carbon emission reduction. Smart meters can be installed in a specific area which can track power consumption and generation and send the data to microgrid. Data sent to microgrid is analysed and stored for recycling of energy. Smart grid when implemented to microgrid can increase the systems reliability and efficiency by intelligent transmission and distribution network between users and microgrid. Benefits and new technology advancements made in smart Microgrid will be discussed in this paper.