对非高斯动态工业系统的双层分布式和集成故障检测策略
Shengli Dong1,2, Xinghan Xu3, Yuhang Chen1,2
1Merchant Marine College, Shanghai Maritime University, Shanghai 201306, China.
Entropy (Basel, Switzerland)
|October 25, 2024
概括
本研究引入了一种新的数据驱动策略,用于复杂工业系统的故障检测. 该方法有效地处理各种数据分布和动态特征,提高检测准确度.
科学领域:
- 工业系统监控 工业系统监控
- 数据驱动故障检测数据驱动故障检测
- 统计过程控制 统计过程控制
背景情况:
- 大规模的工业系统产生复杂的多传感器数据,具有动态高斯特征和非高斯特征.
- 像主要组件分析 (PCA) 这样的传统方法受到高斯分布和数据独立性的假设的限制.
- 现有的方法与并发的动态和混合分布数据作斗争,需要先进的故障检测技术.
研究的目的:
- 开发一套强大的故障检测方法,用于具有并发动态和混合高斯/非高斯特征的大型工业系统.
- 解决处理复杂的真实世界工业数据的传统方法的局限性.
- 在动态和异质数据环境中提高故障检测的准确性和可靠性.
主要方法:
- 一个双层分布式,数据驱动的策略,集成拉普拉斯分数加权和贝叶斯推理.
- 第一层:Jarque-Bera测试用于将变量分类为高斯式和非高斯式块.
- 第二层:动态增强,K-means集群用于局部相似性,并对变量重要性进行拉普拉斯评分,其次是综合贝叶斯推理与检测性能加权.
主要成果:
- 拟议的双层战略有效地结合了各种数据特征:分布差异,活力,局部相似性和可变重要性.
- 综合贝叶斯推理强调了局部模型的贡献,提高了检测灵敏度.
- 在田纳西东曼生产系统和柴油发动机系统上的验证证明了该方法在传统方法上的优越性.
结论:
- 拟议的双层分布式战略为复杂的工业系统的故障检测提供了显著的进步.
- 该方法能够处理混合分布和动态行为的能力使其适合于现实世界的应用.
- 这种方法提供了一个更全面,更准确的工具,以确保工业操作的安全性和效率.
相关概念视频
01:27Line Protection with Impedance Relays
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Coordinating time-delay overcurrent relays in complex radial systems and directional overcurrent relays in multi-source transmission loops can be challenging. Impedance relays address these issues by responding to the voltage-to-current ratio, specifically measuring the apparent impedance of a line. These relays become more sensitive during faults as current increases and voltage decreases, thereby reducing the apparent impedance.
Under normal conditions, low load currents keep the measured...
Under normal conditions, low load currents keep the measured...
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01:25Distribution Reliability and Automation
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01:23Radial System Protection
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Radial systems employ time-delay overcurrent relays to reduce load interruptions. When a fault occurs, the nearest breaker opens first, while upstream breakers remain closed due to longer delay settings. This approach ensures minimal disruption to the rest of the system.
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01:25Multimachine Stability
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01:18Fault Types
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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...
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01:20Differential Relays
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