Analysis of Heavy Load and Overload Distribution Transformer in Regional Power Grid

Cai, Defu; Wang, Wenna; Ma, Xianiun; Xu, Min; He, Zhenting; Tang, Zeyang; Zhou, Chi; Han, Na; Wang, Ying

doi:10.1109/ei2.2018.8581984

Cited by 9 publications

(2 citation statements)

References 4 publications

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“…The overloaded transformer can increase its copper loss and can affect its useful life [9], while on the other hand, in under load state copper loss decrease. Under loaded transformers do not maximize its use and contribute more considerable core loss [10].…”

Section: Electrical Loading Assessment Of Commonly-used Transformers mentioning

confidence: 99%

Electrical Loading Assessment of Commonly Used Transformers for Feeder 21 of Pampanga Distribution Utility

Jr,

Santos,

Tolentino

et al. 2019

IJEAT

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Transformer plays a vital part in the process of utilization of electricity. In power distribution, the most widely used equipment is the distribution transformer (DT) and function to transform the primary voltage of 13200 volts to the utilization level voltage of 230 volts. In a distribution system, transformers are installed serving commercial, industrial, irrigation, street lights and residential consumers. Distribution transformers were classified as sole-used and commonly-used distribution transformers. The study focuses on assessing the commonly-used distribution transformer of Feeder 21 of Pampanga Distribution Utility. Microsoft Excel 2013 was used to evaluate the percent loading, core and copper losses of each DT's installed in the feeder. The DTs were classified according to their percent loading: Overloaded Above 71%, Normal Loaded 40% to 70%, and Under Loaded Below 40%. From the data from 2017-2018, 104 units commonly-used DT's were installed in the feeder. From the results obtained, 30 units were overloaded distribution transformers while 31 units were under loaded distribution transformers. Out of 104 distribution transformers 61 of which are not in the normal loading conditions. The total Core loss in MWh of the distribution transformer in under loaded and overloaded conditions were 34.37 and 38.04, while the copper loss in under loaded and overloaded conditions was 7.46 MWh and 199.76 MWh respectively. The study also shows the implication if the percent loading was maintained to 70%, 110.21MWh will be saved by the electric utility. The researchers find that there is a need in uprating or downrating of transformer and quantifying the consumer connected in each distribution transformers for proper transformer loading may be considered by the Distribution Utility.

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Section: Electrical Loading Assessment Of Commonly-used Transformers mentioning

confidence: 99%

Electrical Loading Assessment of Commonly Used Transformers for Feeder 21 of Pampanga Distribution Utility

Jr,

Santos,

Tolentino

et al. 2019

IJEAT

View full text Add to dashboard Cite

show abstract

“…While the power grid planning strategy is capable of fulfilling load supply requirements, prolonged operation of specific lines under high load conditions could result in line deterioration or malfunction. This, in turn, might affect the power system's safety and reliability [9][10].…”

Section: Introductionmentioning

confidence: 99%

A single-objective optimization model for power systems with the introduction of line-heavy load rate index constraints

Han,

Zhao,

Zhang

et al. 2024

J. Phys.: Conf. Ser.

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The increasing penetration of new energy sources in new power systems has exacerbated the volatility and complexity of power system currents. Grid planning is facing higher challenges. Established grid planning models usually use the upper and lower limits of grid transmission capacity as constraints, but this may lead to long-term heavy load operation of certain lines and increase system risks. Therefore, this paper designs a line-heavy load rate constraint and establishes a single-objective optimization model for grid planning based on this constraint. Example analyses verify the effectiveness of adding line-heavy load rate constraints in planning and the reasonableness of the single-objective optimization model.

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Analysis of COVID-19 effect on residential loads and distribution transformers

Alam

Ali

2021

International Journal of Electrical Power & Energy Systems

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Analysis of Heavy Load and Overload Distribution Transformer in Regional Power Grid

Cited by 9 publications

References 4 publications

Electrical Loading Assessment of Commonly Used Transformers for Feeder 21 of Pampanga Distribution Utility

Electrical Loading Assessment of Commonly Used Transformers for Feeder 21 of Pampanga Distribution Utility

A single-objective optimization model for power systems with the introduction of line-heavy load rate index constraints

Analysis of COVID-19 effect on residential loads and distribution transformers

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