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Related Concept Videos

Transformers with Off-Nominal Turns Ratios01:25

Transformers with Off-Nominal Turns Ratios

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In scenarios involving parallel transformers with disparate ratings, developing per-unit models requires accommodating off-nominal turns ratios. This situation arises when the selected base voltages are not proportional to the transformer’s voltage ratings. Consider a transformer where the rated voltages are related by the term a. If the chosen voltage bases satisfy a relationship involving term b, term c is defined as the ratio of these bases. This ratio is then substituted into the...
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Transformers in Distribution System01:27

Transformers in Distribution System

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Transformers in distribution systems can be broadly categorized into distribution substation transformers and other distribution transformers. They are crucial for stepping down high transmission voltages to levels suitable for distribution and end-user applications.
Distribution substation transformers come in various ratings and typically use mineral oil for insulation and cooling. To prevent moisture and air from entering the oil, some transformers use an inert gas like nitrogen to fill the...
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Energy Losses in Transformers01:21

Energy Losses in Transformers

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In an ideal transformer, it is assumed that there are no energy losses, and, hence, all the power at the primary winding is transferred to the secondary winding. However, in reality,  the transformers always have some energy losses, and, hence, the output power obtained at the secondary winding is less than the input power at the primary winding due to energy losses.
There are four main reasons for energy losses in transformers.
The first cause can be  the high resistance of the...
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Instrument Transformers01:23

Instrument Transformers

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Instrument transformers, comprising voltage transformers (VTs) and current transformers (CTs), play crucial roles in power substations by providing isolated replicas of current or voltage for measurement and protection purposes. Voltage transformers reduce the primary voltage to levels suitable for relay operation and measurement, while current transformers scale down the primary current. The primary winding of a current transformer often consists of a single turn, achieved by threading the...
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Transformers01:26

Transformers

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A device that transforms voltages from one value to another using induction is called a transformer. A transformer consists of two separate coils, or windings, wrapped around the same soft iron core. However, they are electrically insulated from each other.
The iron core has a substantial relative permeability. Therefore, the magnetic field lines generated due to the current in one winding are almost entirely confined within the core, such that the same magnetic flux permeates each turn of both...
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Types Of Transformers01:16

Types Of Transformers

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Transformers can provide desired voltages to a circuit by modifying the number of turns in the secondary windings.
If the ratio of the number of turns in the secondary winding to that of the primary winding is greater than one, then the transformer is said to be a step-up transformer. In a step-up transformer, the voltage at the secondary winding is greater than the voltage applied at the primary winding.
However, if this ratio is less than one, the transformer is said to be a step-down...
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A transformer-based framework for enterprise sales forecasting.

Yupeng Sun1, Tian Li2

  • 1School of Accounting, Yunnan University of Finance and Economics, Yunnan, China.

Peerj. Computer Science
|December 9, 2024
PubMed
Summary
This summary is machine-generated.

This study introduces a new transformer-based framework for business sales forecasting, outperforming traditional machine learning models. The advanced model enhances prediction accuracy for low-dimensional tabular data, aiding strategic business decisions.

Keywords:
Business intelligenceDeep learningSales forecastingTransformers

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Area of Science:

  • Business Analytics
  • Machine Learning
  • Deep Learning

Background:

  • Sales forecasting is crucial for business operations, influencing inventory, resource allocation, and financial planning.
  • Accurate sales predictions are vital for optimizing cash flow, adapting strategies, and strategic planning.

Purpose of the Study:

  • To present a computational framework for business sales prediction using transformers.
  • To tailor a transformer model for low-dimensional tabular data.

Main Methods:

  • Developed a novel computational framework utilizing transformer deep learning architecture.
  • Designed the model specifically for low-dimensional tabular datasets.

Main Results:

  • The proposed transformer model significantly outperformed conventional machine learning models.
  • Achieved reduced Mean Absolute Error (MAE), Mean Square Error (MSE), and Root Mean Square Error (RMSE).
  • Attained high R-squared values, nearing 0.95, indicating superior predictive accuracy.

Conclusions:

  • The transformer-based model is effective for sales forecasting with low-dimensional tabular data.
  • The model's accuracy and stability offer a valuable tool for enhancing business decision-making.
  • Applicable to various studies involving low-dimensional tabular data analysis.