An Orderly Transition to a Transformed Electricity System

Lightner, Eric; Widergren, Steven E.

doi:10.1109/tsg.2010.2045013

Cited by 103 publications

(41 citation statements)

References 3 publications

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“…The smart grid is being actively studied in many countries as a new concept in power systems whereby ICT is used to raise reliability and power quality, improve the availability of power systems, increase energy efficiency, introduce and expand the use of renewable energy, and reduce peak load [72]. In contrast to a microgrid whose capacity and scale and target area are limited compared to existing power systems, the smart grid is a concept that includes all types of power generation, power transmission and distribution, and power customers while accommodating future developments like distributed power supplies and electric vehicles whose introduction and expansion are expected.…”

Section: Smartgridsmentioning

confidence: 99%

Smart Power Supply Systems for Mission Critical Facilities

Hirose

Babasaki

2012

IEICE Trans. Commun.

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SUMMARYTo develop the advanced and rich life, and the also economy and social activity continuously, various types of energy are necessary. At the same time, to protect the global environment and to prevent the depletion of natural resources, the effective and moreover efficient use of energy is becoming important. Electric power is one of the most important forms of energy for our life and society. This paper describes topics and survey results of technical trends regarding the electric power supply systems which are playing a core role as the important infrastructure to support the emergence of information-oriented society. Specifically, the power supply systems that enhance high power quality and reliability (PQR) are important for the steady growth of information and communication services. The direct current (DC) power, which has been used for telecommunications power systems and information and communications technologies (ICT), enables existing utilities' grid and distributed energy resources to keep a balance between supply and demand of small-scaled power systems or microgirds. These techniques are expected to be part of smartgrid technologies and facilitate the installation of distributed generators in mission critical facilities.

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Section: Smartgridsmentioning

confidence: 99%

Smart Power Supply Systems for Mission Critical Facilities

Hirose

Babasaki

2012

IEICE Trans. Commun.

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“…Therefore, grid impedance may vary over a wide range [5]. Moreover, the regulation for optimizing power system operation may change the grid configuration periodically; this process affects the grid impedance remarkably even at the same point of common coupling (PCC) [6]. Furthermore, other factors, such as the faults, tripping of lines and load variations, can cause grid impedance variations.…”

Section: Introductionmentioning

confidence: 99%

BPF-based Grid Voltage Feedforward Control of Grid-connected Converters for Improving Robust Stability

Yang¹,

Tong²,

Yin³

et al. 2017

Journal of Power Electronics

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Grid voltage feedforward is extensively used for controlling grid-connected converters. However, the conventional voltage feedforward control reduces the stability margins of the converter connected to a high-impedance grid. The effect mechanism of voltage feedforward on the grid-connected converter control under high-inductive conditions of the grid impedance is clearly explained in this study using the equivalent transformations of control block diagrams. Results show that the delay produced by the digital control is the root cause of this effect. An improved voltage feedforward strategy, in which a bandpass filter (BPF) is introduced into the feedforward path, is proposed to strengthen the converter's robust stability against grid impedance variations. The selection method of the BPF's bandwidth is also provided considering the tradeoff between the response speed to the grid voltage sag and the system's robust stability. The converter can work stably over a wide range of the grid impedance through the proposed approach. Simulation and experimental results fully verify the effectiveness of the BPF-based voltage feedforward strategy.

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“…The power grid is in constant evolution [1], and the transformation to a smarter grid [2,3] is widely considered to be progressive [4][5][6]. These evolutionary changes are today taking place in different areas and levels of the grid [7], affecting many different stakeholders, such as utilities, consumers, service providers, vendors, governments and regulators [4].…”

Section: Introductionmentioning

confidence: 99%

A Methodology for Assessing Islanding of Microgrids: Between Utility Dependence and Off-Grid Systems

et al. 2015

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This paper presents a novel methodology for assessing islanding microgrids from the economical and functional perspective, for various stakeholders. The paper proposes the triggers for competitive deployment of microgeneration, storage, microgrid islanding, the market conditions that apply, and discusses the future tendencies and the policy recommendations to foster microgrid benefits. The validation of the proposed scheme is based on real market cases, where the triggers for autogeneration and islanding microgrids are present. Additionally, the new concept of grid independence cycle is presented and analyzed. The policy implications of a situation where grid consumption reduction leads to higher energy prices are presented and discussed. The paper concludes with a summary of prioritized technical and regulatory recommendations, proposed as a result of the assessment.

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An Orderly Transition to a Transformed Electricity System

Cited by 103 publications

References 3 publications

Smart Power Supply Systems for Mission Critical Facilities

Smart Power Supply Systems for Mission Critical Facilities

BPF-based Grid Voltage Feedforward Control of Grid-connected Converters for Improving Robust Stability

A Methodology for Assessing Islanding of Microgrids: Between Utility Dependence and Off-Grid Systems

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