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Author

Nirmal-Kumar C. Nair

Other affiliations: Texas A&M University
Bio: Nirmal-Kumar C. Nair is an academic researcher from University of Auckland. The author has contributed to research in topics: Smart grid & Fault (power engineering). The author has an hindex of 23, co-authored 159 publications receiving 2535 citations. Previous affiliations of Nirmal-Kumar C. Nair include Texas A&M University.


Papers
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Journal ArticleDOI
TL;DR: In this article, a simple, practical and comprehensive assessment of battery energy storage technologies for small-scale renewable applications based on their technical merit and economic feasibility is presented, and a modelling framework to quantify the associated benefits of renewable resource integration is provided.

289 citations

Journal ArticleDOI
01 Jan 2011
TL;DR: The interplay between two international standards is investigated, and a way of combining of the application functions of IEC 61850-compliant devices with IEC61499-compl compliant “glue logic,” using the communication services of I EC 6 1850-7-2 is proposed.
Abstract: This paper presents a new approach to power system automation, based on distributed intelligence rather than traditional centralized control. The paper investigates the interplay between two international standards, IEC 61850 and IEC 61499, and proposes a way of combining of the application functions of IEC 61850-compliant devices with IEC 61499-compliant “glue logic,” using the communication services of IEC 61850-7-2. The resulting ability to customize control and automation logic will greatly enhance the flexibility and adaptability of automation systems, speeding progress toward the realization of the smart grid concept.

210 citations

Journal ArticleDOI
TL;DR: In this paper, the impact of using phase change materials (PCM) in buildings to leverage its thermal energy storage capability is assessed from an electricity demand side perspective with case studies that incorporate wholesale electricity market data of New Zealand.

176 citations

Journal ArticleDOI
TL;DR: In this paper, a brief review of techniques available for reducing large systems to smaller equivalents is presented, which is divided into high frequency equivalents, low frequency equivalents and wideband equivalents.
Abstract: This paper presents a brief review of techniques available for reducing large systems to smaller equivalents This paper is divided into high frequency equivalents, low frequency equivalents, and wideband equivalents Numerical examples are presented to demonstrate selected methods of high frequency equivalencing

153 citations

Journal ArticleDOI
TL;DR: In this paper, an accurate non-linear circuit model is established and the stroboscopic theory is extended to determine the zero-voltage switching (ZVS)-operating frequency of the system.
Abstract: Capacitively coupled contactless power transfer (CCPT) technology has been proposed as a new contactless/wireless power transfer method recently. By employing electric field as the energy transfer medium, CCPT has advantages of being able to transfer power across metal barriers and reduced electromagnetic interference. However, there is very limited understanding and experience in the CCPT system modelling and analysis. This study models a typical CCPT system and analyses its performance under steady-state operations. An accurate non-linear circuit model is established and the stroboscopic theory is extended to determine the zero-voltage switching (ZVS)-operating frequency of the system. The tuning inductance for achieving exact ZVS operation is derived, and the effects of the coupling and load variations on the system performance are analysed. A prototype CCPT circuit is built, and practical measurements show that the steady-state time domain waveforms and efforts of coupling and load variations calculated from the theoretical model are in good agreements with experimental results. The power efficiency predicted is slightly higher than the practical results, particularly at heavy loads, because ideal power semiconductor switches and wires are used in the theoretical model.

115 citations


Cited by
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Journal ArticleDOI
TL;DR: An overview and a taxonomy for DSM is given, the various types of DSM are analyzed, and an outlook on the latest demonstration projects in this domain is given.
Abstract: Energy management means to optimize one of the most complex and important technical creations that we know: the energy system. While there is plenty of experience in optimizing energy generation and distribution, it is the demand side that receives increasing attention by research and industry. Demand Side Management (DSM) is a portfolio of measures to improve the energy system at the side of consumption. It ranges from improving energy efficiency by using better materials, over smart energy tariffs with incentives for certain consumption patterns, up to sophisticated real-time control of distributed energy resources. This paper gives an overview and a taxonomy for DSM, analyzes the various types of DSM, and gives an outlook on the latest demonstration projects in this domain.

2,647 citations

Journal ArticleDOI
TL;DR: In this paper, the authors present an energy fundiment analysis for power system stability, focusing on the reliability of the power system and its reliability in terms of power system performance and reliability.
Abstract: (1990). ENERGY FUNCTION ANALYSIS FOR POWER SYSTEM STABILITY. Electric Machines & Power Systems: Vol. 18, No. 2, pp. 209-210.

1,080 citations

Journal ArticleDOI
TL;DR: This paper overviews the issues related to the smart grid architecture from the perspective of potential applications and the communications requirements needed for ensuring performance, flexible operation, reliability and economics.
Abstract: Information and communication technologies (ICT) represent a fundamental element in the growth and performance of smart grids. A sophisticated, reliable and fast communication infrastructure is, in fact, necessary for the connection among the huge amount of distributed elements, such as generators, substations, energy storage systems and users, enabling a real time exchange of data and information necessary for the management of the system and for ensuring improvements in terms of efficiency, reliability, flexibility and investment return for all those involved in a smart grid: producers, operators and customers. This paper overviews the issues related to the smart grid architecture from the perspective of potential applications and the communications requirements needed for ensuring performance, flexible operation, reliability and economics.

1,018 citations

Journal ArticleDOI
TL;DR: This paper presents an overview of WPT techniques with emphasis on working mechanisms, technical challenges, metamaterials, and classical applications, and discusses about future development trends.
Abstract: Due to limitations of low power density, high cost, heavy weight, etc., the development and application of battery-powered devices are facing with unprecedented technical challenges. As a novel pattern of energization, the wireless power transfer (WPT) offers a band new way to the energy acquisition for electric-driven devices, thus alleviating the over-dependence on the battery. This paper presents an overview of WPT techniques with emphasis on working mechanisms, technical challenges, metamaterials, and classical applications. Focusing on WPT systems, this paper elaborates on current major research topics and discusses about future development trends. This novel energy transmission mechanism shows significant meanings on the pervasive application of renewable energies in our daily life.

875 citations