The Experts below are selected from a list of 32844 Experts worldwide ranked by ideXlab platform

Daniel J. Tichenor - One of the best experts on this subject based on the ideXlab platform.

  • Historical Set Points and the Development of U.S. Presidential Emergency Power
    Perspectives on Politics, 2013
    Co-Authors: Daniel J. Tichenor
    Abstract:

    The recent outpouring of work on executive Power during emergencies, inspired by the post-9/11 era, has significantly enhanced our legal and theoretical understanding of this crucial subject. A key flaw in this literature, however, is that it is historically un-rooted, either dismissing or ignoring important analytical and empirical insights from presidential research and from APD and historical-institutionalist perspectives. In this article, I argue that we can better explain patterns and variations in the use of presidential Emergency Power by paying careful attention to shifting historical set points for executive choice and action during security crises. In particular, the findings here underscore the episodic growth of new precedents, resources, and expectations for the White House in perilous contexts. The development of presidential Emergency Power reflects the potential for early executive choices to be repeated and legitimated over time, laying dormant as a “loaded weapon” to be used by future executives in similarly urgent circumstances.

Peng Fang-zheng - One of the best experts on this subject based on the ideXlab platform.

  • Study of a Novel Three-phase Emergency Power Supply Circuit
    IEEE Transactions on Power Electronics, 2006
    Co-Authors: Peng Fang-zheng
    Abstract:

    A novel circuit of three-phase Emergency Power Supply(EPS) is introduced in this paper.The bidirectional DC/DC converter is used to charge and discharge battery,bidirectional PWM converter is used as rectifier and inverter,Digital Signal Processor(DSP) is used to control the main circuit of the EPS.Through the analysis on principles,simulation and experiment showed that this circuit is feasible.

Zuping Zhang - One of the best experts on this subject based on the ideXlab platform.

  • Study on the optimal allocation of Emergency Power supplies for urban important customers
    2009 International Conference on Sustainable Power Generation and Supply, 2009
    Co-Authors: Limei Zhou, Mingtian Fan, Zuping Zhang
    Abstract:

    The optimal allocation of Emergency Power supplies should consider the distribution of existing distributed generators, capacity of existing Emergency Power suppliers in each local district utility and important customers' needs for Emergency Power supplies. Based on the relationship between Power supply reliability and economy, the optimum model of Emergency Power supplies has been proposed in this paper with the minimum total cost as objective function and some constraints such as time and capacity etc. An optimal algorithm of Emergency Power supplies based on genetic algorithm is put forward. The model and algorithm brought forward are proved by a practical example and software development based on GIS. The study results help to improve Power supply reliability and the ability of urban electric network for Emergency situation, reduce customers' outage costs and guarantee Power system with preventive and Emergency measures facing natural and man-made disasters.

  • The capability assessment of Emergency Power supply in urban Power network
    IET Conference Publications, 2009
    Co-Authors: Mingtian Fan, Sige Liu, Zuping Zhang
    Abstract:

    This paper is focus on the capacity assessment on the Emergency Power supply in urban Power network. The capability assessment of Emergency Power supply is one of the most important components in the Emergency management of urban Power network. In recent years, by natural disasters such as ice hazard, earthquakes and other unexpected events, some of Chinese urban Power networks have suffered severe damage, resulting in some blackout accidents. To assessment the capability of Power supply during Emergency, it needs to establish a set of criteria. Based on the assessment, Power supply utilities can reasonably instruct the operation, planning and design of Power network. This paper proposes an evaluation indexes system for urban Emergency Power supply capacity, in which include four category of indicators, such as external environmental assessment indexes, network status evaluation indexes, the user needs assessment indexes , and the enterprise's own evaluation indexes.

  • A study on the optimal allocation of Emergency Power supplies in urban electric network
    IET Conference Publications, 2009
    Co-Authors: Limei Zhou, Mingtian Fan, Zuping Zhang
    Abstract:

    The optimal allocation of Emergency Power supplies should consider the distribution of existing distributed generators, capacity of existing Emergency Power suppliers in each local district utility and important customers' needs. Based on the relationship between Power supply reliability and economy, the optimum model of Emergency Power supplies has been proposed in this paper with the minimum total cost as objective function and some constraints such as time and capacity etc.. In order to determine the number and capacity of mobile Power generating vehicles equipped in each local district utility, an optimal algorithm of Emergency Power supplies based on genetic algorithm is put forward. The model and algorithm brought forward are proved by a practical example and software development based on GIS. The study results help to improve Power supply reliability and the ability of urban electric network for Emergency situation, reduce customers' outage costs and guarantee Power system with preventive and Emergency measures facing natural and man-made disasters.

Matthew Walker - One of the best experts on this subject based on the ideXlab platform.

  • Emergency Power Upgrades in Critical Facilities: Strategies for Risk Mitigation
    IEEE Industry Applications Magazine, 2020
    Co-Authors: Philip Chow, Matthew Walker
    Abstract:

    This article discusses risk mitigation strategies for Emergency Power upgrades in critical facilities such as hospitals and data centers. Larger facilities and campuses typically have complex Emergency Power systems, which rely on multiple standby generators, control systems for paralleling and automatic transfer sequences, switchgear, and medium-voltage Power distribution systems. Integration among components is essential in ensuring the reliable operation of the Emergency Power system. Given the critical nature of the loads supported by Emergency Power systems, downtime is unacceptable. There are a number of risk mitigation strategies that can be undertaken to minimize the operational risk associated with equipment upgrade projects. This article will review successful strategies from two separate projects that involved completely upgrading Emergency Power systems.

  • Risk Mitigation Strategies for Emergency Power Upgrades in Critical Facilities
    2019 IEEE IAS 55th Industrial and Commercial Power Systems Technical Conference (I&CPS), 2019
    Co-Authors: Philip Chow, Matthew Walker
    Abstract:

    This paper discusses risk mitigation strategies for Emergency Power upgrades in critical facilities, such as hospitals and data centers. Larger facilities and campuses, typically have complex Emergency Power systems, which rely on multiple standby generators, control systems for paralleling and automatic transfer sequences, switchgear and medium voltage Power distribution systems. Integration amongst components is essential in ensuring reliable operation of the Emergency Power system. Given the critical nature of the loads supported by Emergency Power systems, downtime cannot be tolerated. There are a number of risk mitigation strategies that can be undertaken to minimize the operational risk associated with equipment upgrade projects. This paper will review successful strategies from two separate projects that involved completely upgrading Emergency Power systems.

Chen Feng-xiang - One of the best experts on this subject based on the ideXlab platform.

  • Design of full digital controlled fuel cell Emergency Power system
    Chinese Journal of Power Sources, 2012
    Co-Authors: Chen Feng-xiang
    Abstract:

    To overcome the drawbacks of traditional Emergency Power supply(EPS),such as short feeding duration,long switching time and requirement of uninterrupted Power supply from utility grad when UPS is off,an innovative fuel cell Emergency Power supply was developed,based on digital signal possessor(DSP).The core design strategy was that a fuel cell(FC) was applied as main Power source while a battery as an auxiliary Power source.Thus,the EPS Power-on time was prolonged as needed.In addition,the hardware could automatically switch when the utility grid Power shut down with a switching time less than 10 ms.It provided an effective solution to solve the problem of long switching time.Finally,the developed FC EPS system was tested.And the result shows its long Power-on time,short switching time,fantastic operating reliability and good application potential.