Investigate the effect of variations of ambient temperature on HST of transformer

Askari, Mohammad Tolou; Kadir, Mohd Zainal Abidin Ab; Ahmad, Wan Fatinhamamah Wan; Izadi, Mehdi

doi:10.1109/scored.2009.5442998

Cited by 6 publications

(3 citation statements)

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“…multiple, consecutive days) and is also more directly associated to exceedance of an absolute temperature (average and/or daily maximum) rather than a more meteorologically-based metric tied to a percentile exceedance. High temperatures affect the peak load capability of an LPT, which can decrease by about 10% at extreme temperatures (Sathaye 2011;Li et al 2005) and increase the risk of transformer failure (Weekes et al 2004;Fu et al 2001), while reducing the operational lifetime (Askari et al 2009). In this context, we are interested in the deterioration of an LPT associated with a preponderance of daysand anticipated trends in the coming decades -whose temperatures reach or exceed what are incrementally damaging as a result of ambient conditions and/or load burdens from electricity demands.…”

Section: Calibration and Evaluation Of Analogue Methodsmentioning

confidence: 99%

Potential impacts of climate warming and increased summer heat stress on the electric grid: a case study for a large power transformer (LPT) in the Northeast United States

2017

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Large power transformers (LPTs) are critical yet vulnerable components of the power grid. More frequent and intense heat waves or high temperatures can degrade their operational lifetime and increase the risk of premature failure. Without adequate preparedness, a widespread situation could ultimately lead to prolonged grid disruption and incur excessive economic costs. Here we investigate the potential impact of climate warming and corresponding shifts in summertime "hot days" on a selected LPT located in the Northeast United States. We apply an analogue method, which detects the occurrence of hot days based on the salient, associated large-scale atmospheric conditions, to assess the risk of future change in their occurrence. Compared with the more conventional approach that relies on climate model-simulated daily maximum temperature, the analogue method produces model medians of late twentieth-century hot day frequency that are more consistent with observation and have stronger inter-model consensus. Under the climate warming scenarios, multi-model medians of both model daily maximum temperature and analogue method indicate strong decadal increases in hot day frequency by the late 21 st century, but analogue method improves model consensus considerably. The decrease of transformer lifetime with temperature increase is further assessed. The improved inter-model consensus of the analogue method is viewed as a promising step toward providing actionable information for a more stable, reliable, and environmentally responsible national grid.

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Section: Calibration and Evaluation Of Analogue Methodsmentioning

confidence: 99%

Potential impacts of climate warming and increased summer heat stress on the electric grid: a case study for a large power transformer (LPT) in the Northeast United States

2017

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“…The difficulty begins with increasing peak demand for home and commercial cooling, which currently accounts for 30% of peak demand. At the same time, power plant efficiencies (Maulbetsch and DiFilippo 2006) and transmission line (IEEE 2007), substation, and transformer (Askari et al 2009) capacities are reduced. Higher temperatures increase wildfire activity, which poses risks from direct infrastructure damage to indirect fouling due to soot and firefighting products (Sathaye et al 2011).…”

Section: (California Department Of Water Resources 2009) Because We mentioning

confidence: 99%

Climate and Energy-Water-Land System Interactions Technical Report to the U.S. Department of Energy in Support of the National Climate Assessment

Skaggs¹,

Hibbard²,

Frumhoff³

et al. 2012

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Executive SummaryThis technical input report on climate and energy-water-land (EWL) system interactions has been prepared for the U.S. Department of Energy in support of the U.S. National Climate Assessment (NCA). Prepared on an accelerated schedule to fit the NCA's timeline, it provides a summary of existing information and understanding of this broad topic.This report provides a framework to characterize and understand the important elements of climate and EWL system interactions. It identifies many of the important issues, discusses our understanding of those issues, and identifies the research needs to address the priority scientific challenges and gaps in our understanding. Much of the discussion is organized around two discrete case studies with the broad themes of (1) extreme events and (2) regional differences. These case studies help demonstrate unique ways in which energy-water-land interactions can occur and be influenced by climate. In addition, a series of "illustrations" portray representative decision-making considerations relevant to climate-EWL interfaces. Key findings from the report are summarized below, according to the report section in which they are found. Characterization of Climate and Energy-Water-Land System Interactions• Population growth and economic and social development are major drivers of the demand for energy, land, and water resources within the interdependent climate and EWL system. A major challenge will be to manage, and optimize where possible, competing economic and environmental objectives and priorities within resource budget constraints and impact risks of climate variability and change.• The interdependencies of climate and the EWL system can be characterized by the three bilateral interfaces of energy-water, energy-land, and land-water. Each bilateral interface consists of linkages representing the supplies, end-use demands, and associated functional relationships between the two.• Much of our current understanding of climate impacts on the complex interdependencies of the EWL system is derived from limited observations of bilateral interface responses to climate variability. The concept of EWL interfaces can help identify the relative degree of risks and vulnerabilities to the effects of climate variability and change. Energy-Water-Land Interfaces: Resource Interdependencies and Interactions with Climate• Focusing on sector-to-sector interfaces alone does not adequately capture the complexity and importance of the EWL system. The many bilateral interfaces form a dynamic set of interacting processes linked through a complex network of feedbacks.• Competition for water is the most straightforward conflict linking energy, water, and land (e.g., simultaneous demand for thermoelectric generation, irrigation, environmental flows).• Extreme climate events such as drought and associated heat waves have important impacts on the EWL interfaces. Impacts are seen as changes in cropping and grazing and accompanying wildfire damage. These changes tend to reinforce and intensify i...

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“…A number of studies have been conducted on the performance and monitoring of transformers under different operating conditions, including changing ambient temperatures (e.g., Lesieutre et al 1997;Li et al 2005;Li and Zielke 2003;Swift et al 2001;Askari et al 2009). …”

Section: Projected Impacts To Substation/transformer Capacitymentioning

confidence: 99%

Estimating Risk to California Energy Infrastructure From Projected Climate Change

Sathaye¹,

Dale²,

Larsen³

et al. 2011

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Investigate the effect of variations of ambient temperature on HST of transformer

Cited by 6 publications

References 1 publication

Potential impacts of climate warming and increased summer heat stress on the electric grid: a case study for a large power transformer (LPT) in the Northeast United States

Potential impacts of climate warming and increased summer heat stress on the electric grid: a case study for a large power transformer (LPT) in the Northeast United States

Climate and Energy-Water-Land System Interactions Technical Report to the U.S. Department of Energy in Support of the National Climate Assessment

Estimating Risk to California Energy Infrastructure From Projected Climate Change

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