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相关概念视频

Three-Winding Transformers01:19

Three-Winding Transformers

666
Three identical single-phase transformers can be configured to form a three-phase transformer connection, which involves high-voltage and low-voltage windings. The high-voltage windings are denoted by capital letters A-B-C, while the low-voltage windings are labeled with lowercase letters a-b-c, representing their respective phases. This notation helps distinguish between the high and low voltage sides of the transformer.
In the per-unit equivalent circuit of a grounded Y-Y three-phase...
666
Transformers01:26

Transformers

1.7K
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...
1.7K
Energy Losses in Transformers01:21

Energy Losses in Transformers

1.3K
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...
1.3K
Equivalent Circuits for Practical Transformers01:28

Equivalent Circuits for Practical Transformers

1.3K
The practical equivalent circuits of single-phase two-winding transformers exhibit significant deviations from their idealized versions due to the inherent properties of winding resistance and finite core permeability. These properties result in real and reactive power losses, affecting the transformer's performance. Understanding these deviations is crucial for designing more efficient transformers.
In a practical transformer, each winding exhibits resistance and leakage reactance. The...
1.3K
Transformers with Off-Nominal Turns Ratios01:25

Transformers with Off-Nominal Turns Ratios

495
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...
495
Power System Three-Phase Short Circuits01:21

Power System Three-Phase Short Circuits

509
Determining the subtransient fault current in a power system involves representing transformers by their leakage reactances, transmission lines by their equivalent series reactances, and synchronous machines as constant voltage sources behind their subtransient reactances. In this analysis, certain elements are excluded, such as winding resistances, series resistances, shunt admittances, delta-Y phase shifts, armature resistance, saturation, saliency, non-rotating impedance loads, and small...
509

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相关实验视频

Updated: Jan 11, 2026

Design and Application of a Fault Detection Method Based on Adaptive Filters and Rotational Speed Estimation for an Electro-Hydrostatic Actuator
06:45

Design and Application of a Fault Detection Method Based on Adaptive Filters and Rotational Speed Estimation for an Electro-Hydrostatic Actuator

Published on: October 28, 2022

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使用频率响应分析和先进的数据可视化技术识别变压器线圈缺陷.

Abdoallah Hosseini1, Ali Abbasi2, Ali Reza Abbasi3

  • 1Department of Electrical Engineering, Bu.C. Islamic Azad University, Bushehr, Iran.

Scientific reports
|November 18, 2025
PubMed
概括
此摘要是机器生成的。

早期检测变压器绕线故障对于电网可靠性至关重要. 本研究介绍了使用因子分析,模糊集群分析和主要组件分析的先进数据可视化技术,以简化频率响应分析的解释并提高故障诊断的准确性.

关键词:
数据可视化,故障检测,变压器进行了因素分析.模糊集群分析分析模糊集群分析主要组件分析的主要组件分析.

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Design, Instrumentation and Usage Protocols for Distributed In Situ Thermal Hot Spots Monitoring in Electric Coils using FBG Sensor Multiplexing
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Design, Instrumentation and Usage Protocols for Distributed In Situ Thermal Hot Spots Monitoring in Electric Coils using FBG Sensor Multiplexing

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A Guide to Concentration Alternating Frequency Response Analysis of Fuel Cells
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Design and Application of a Fault Detection Method Based on Adaptive Filters and Rotational Speed Estimation for an Electro-Hydrostatic Actuator
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Design and Application of a Fault Detection Method Based on Adaptive Filters and Rotational Speed Estimation for an Electro-Hydrostatic Actuator

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Design, Instrumentation and Usage Protocols for Distributed In Situ Thermal Hot Spots Monitoring in Electric Coils using FBG Sensor Multiplexing
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A Guide to Concentration Alternating Frequency Response Analysis of Fuel Cells
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科学领域:

  • 电气工程 电气工程
  • 电力系统分析 分析 分析
  • 诊断技术 诊断技术

背景情况:

  • 变压器在电力网络中至关重要,面临的压力可能会导致微妙的绕线故障.
  • 这些故障的早期检测对于防止重大故障和确保电网稳定性至关重要.
  • 频响应分析 (FRA) 是一种常见的诊断工具,但其复杂的结果阻碍了解释.

研究的目的:

  • 开发先进的数据可视化技术,用于解释频率响应分析 (FRA) 结果.
  • 为了提高早期预测和诊断变压器上故障.
  • 简化工程师和操作人员对FRA数据的解释.

主要方法:

  • 使用因子分析来识别复杂的,隐藏的故障因素.
  • 利用模糊集群分析来检测不确定性的组合故障条件.
  • 应用主要组件分析,以减少数据的维度和增强可解释性.
  • 开发了一种两阶段识别模型,用于健康/故障区分和随后的故障分类.

主要成果:

  • 提出的技术有效地提取了频率响应特征,以准确识别故障.
  • 实验结果表明,在诊断变压器绕线故障方面,其准确度很高.
  • 这些方法成功地区分了健康和故障的变压器条件.
  • 在有缺陷的条件下,故障分类能够以显著的准确度实现.

结论:

  • 先进的数据可视化技术简化了用于变压器故障诊断的FRA解释.
  • 开发的方法减少了对故障诊断和分类的专业专业知识的需求.
  • 这种方法提供了一种更有效和更容易获得的方法来诊断变压器上故障.