基于振动信号封面分析的中压断路器故障诊断
Yongbin Wu1, Jianzhong Zhang1, Zhengxi Yuan1
1School of Electrical Engineering, Southeast University, Nanjing 210096, China.
Sensors (Basel, Switzerland)
|October 14, 2023
概括
本研究引入了一种使用振动信号分析诊断中压断路器 (MVCB) 故障的新方法. 这种方法提高了运营可靠性,并通过专注于信号包裹来降低成本.
科学领域:
- 电气工程 电气工程
- 电力系统 电力系统
- 状态监控 状态监控
背景情况:
- 中压断路器 (MVCB) 是现代电力系统和新能源站的关键组件.
- 确保MVCB的运行可靠性对于电网的稳定性和安全性至关重要.
- 在线监控技术为提高MVCB可靠性提供了一个有希望的途径.
研究的目的:
- 开发一种先进的MVCB故障诊断方法,利用振动信号封面分析.
- 实施一个系统,用于线下故障功能培训和在线故障诊断.
- 通过高效的信号处理来降低监控硬件和软件的成本.
主要方法:
- 离线阶段:从历史的MVCB操作数据中提取振动信号包裹.
- 离线阶段:使用波束包-能量频谱分析构建典型的故障特征向量 (M).
- 在线阶段:从提取的振动信号包中构建实时故障特征向量 (T).
- 在线阶段:通过计算特征向量T和M之间的距离来评估MVCB状态.
主要成果:
- 拟议的方法有效地提取和分析振动信号包裹用于故障检测.
- 波束数据包能量频谱被用来创建强大的故障特征向量.
- 通过比较实时和历史特征向量,可以准确评估MVCB的运行状态.
结论:
- 振动信号封面分析为MVCB故障诊断提供了一种有效和经济高效的方法.
- 通过专注于信封来减少信号带宽,可以显著降低处理硬件和软件的成本.
- 这种方法提高了电力系统中中压断路器的可靠性和安全性.
更多相关视频
08:27Author Spotlight: Efficient Image Recognition Using Directional Gradient Histogram Technique and Support Vector Machines
Published on: January 5, 2024
1.1K
05:11High-precision Electromagnetic Flowmeter with Empty Pipe Detection via Complex Programmable Logic Device-based Waveform Recognition
Published on: June 27, 2025
25
相关概念视频
Circuit Breaker and Fuse Selection
111
A circuit breaker is a device engineered to interrupt fault currents and sometimes reclose automatically. When a fault current is detected, the breaker separates the electrical contacts, which generates an arc. This arc is extinguished by methods such as elongation, cooling, or splitting, depending on the breaker's design. Breakers are categorized based on the voltage they operate at and the medium used for arc extinction, such as air, oil, SF6 gas, or vacuum.
In high-voltage systems,...
In high-voltage systems,...
111
Three-Phase Short Circuit—Unloaded Synchronous Machine
151
Conducting a three-phase short circuit test on an unloaded synchronous machine helps understand its impact on the system. The AC fault current's oscillogram, with the DC offset removed, reveals that the waveform amplitude decreases from an initially high value to a steady-state level for one phase of the machine.
This behavior occurs due to the magnetic flux produced by the short-circuit armature currents. Initially, these currents follow high-reluctance paths but eventually shift to...
This behavior occurs due to the magnetic flux produced by the short-circuit armature currents. Initially, these currents follow high-reluctance paths but eventually shift to...
151
Power System Three-Phase Short Circuits
94
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...
94
Fault Types
91
When analyzing a single line-to-ground fault from phase A to ground at a three-phase bus, it is important to consider the fault impedance. This impedance is zero for a bolted fault, equal to the arc impedance for an arcing fault, and represents the total fault impedance for a transmission-line insulator flashover. To derive sequence and phase currents, fault conditions are translated from the phase domain to the sequence domain.
For line-to-line faults occurring between phases B and C, the...
For line-to-line faults occurring between phases B and C, the...
91
Differential Relays
149
Differential relays are used to protect generators, buses, and transformers by comparing electrical quantities at different points. When a fault occurs, the difference in current between the two points triggers the relay to operate, opening the circuit breaker. Under normal conditions, the current entering (i1) and leaving (i2) a generator are equal. When a fault occurs, however, these currents become unequal, and the difference current flows in the relay operating coil, causing the relay to...
149
IR Spectrum Peak Splitting: Symmetric vs Asymmetric Vibrations
1.1K
Identical bonds within a polyatomic group can stretch symmetrically (in-phase) or asymmetrically (out-of-phase). Similar to hydrogen bonding, these vibrations also influence the shape of the IR peak. Generally, asymmetric stretching frequencies are higher than symmetric stretching frequencies. For example, primary amines exhibit two distinct IR peaks between 3300–3500 cm−1 corresponding to the symmetric and asymmetric N-H stretching, while secondary amines exhibit a single...
1.1K
