基于KSQDC-ADEAD在复杂操作条件下的水力发电机组异常检测方法
Tongqiang Yi1,2, Xiaowu Zhao3, Yongjie Shi1,2
1Key Laboratory of Hydraulic Machinery Transients, Ministry of Education, Wuhan University, Wuhan 430072, China.
Sensors (Basel, Switzerland)
|July 12, 2025
概括
本研究引入了一种用于检测水力发电机组异常的新方法,提高运行安全和电力系统稳定性. KSQDC-ADEAD算法提高了识别复杂操作条件和预测维护需求的准确性.
科学领域:
- 工程 工程师 工程师 工程师
- 计算机科学 计算机科学
- 能源系统 能源系统
背景情况:
- 水力发电机组对于清洁能源和电力系统安全至关重要.
- 在复杂的操作条件下检测异常是一个重大的技术挑战.
- 现有的方法与水电机组运行固有的非线性作斗争.
研究的目的:
- 为水力发电机组开发一种先进的异常检测方法.
- 改进复杂运行条件的识别.
- 提高水电基础设施预测性维护的准确性和可靠性.
主要方法:
- K-意味着为操作条件识别进行种子二次区分分类集群 (KSQDC).
- 适应密度感知集体异常检测 (ADEAD) 算法用于改进检测.
- 整合K-平均分区与二次差别分析用于非线性边界检测.
- 在ADEAD内结合学习和密度适应策略,以获得稳健性.
主要成果:
- 在条件识别方面,KSQDC实现了0.64的轮系数,超过了传统方法.
- 在关键监测点 (分数为0.30,0.34,0.23) 上,KSQDC-ADEAD在异常检测方面表现强.
- 提出的方法显著提高了使用真实世界的操作数据检测异常的准确性和可靠性.
结论:
- KSQDC-ADEAD方法为水力发电机组状态监测提供了一个系统的解决方案.
- 这种方法提高了清洁能源系统的安全性和稳定性.
- 这些发现支持了水电设施预测性维护方面的进展.
相关概念视频
01:24Fast Decoupled and DC Powerflow
294
The fast decoupled power flow method addresses contingencies in power system operations, such as generator outages or transmission line failures. This method provides quick power flow solutions, essential for real-time system adjustments. Fast decoupled power flow algorithms simplify the Jacobian matrix by neglecting certain elements, leading to two sets of decoupled equations:
294
01:26The Power Flow Problem and Solution
344
Power flow problem analysis is fundamental for determining real and reactive power flows in network components, such as transmission lines, transformers, and loads. The power system's single-line diagram provides data on the bus, transmission line, and transformer. Each bus k in the system is characterized by four key variables: voltage magnitude Vk, phase angle δk, real power Pk, and reactive power Qk. Two of these four variables are inputs, while the...
344
01:25Distribution Reliability and Automation
166
Distribution reliability in electrical power systems is critical for ensuring an uninterrupted power supply to consumers at minimal cost. According to IEEE Standard Terms, reliability is the probability that a device will function without failure over a specified time period or amount of usage. For electric power distribution, this translates to maintaining continuous power supply and addressing customer concerns over power outages. Several indices, as defined by IEEE Standard 1366-2012, are...
166
01:28Load-frequency control
263
Load-frequency control (LFC) is vital for maintaining power system stability, ensuring that frequency and power flows remain within acceptable limits during load changes. Turbine-governor control eliminates rotor accelerations and decelerations following load changes. However, a steady-state frequency error persists when the change in the turbine-governor reference setting is zero. In an interconnected power system, each area agrees to export or import a scheduled amount of power through...
263
01:25Multimachine Stability
233
Multimachine stability analysis is crucial for understanding the dynamics and stability of power systems with multiple synchronous machines. The objective is to solve the swing equations for a network of M machines connected to an N-bus power system.
In analyzing the system, the nodal equations represent the relationship between bus voltages, machine voltages, and machine currents. The nodal equation is given by:
In analyzing the system, the nodal equations represent the relationship between bus voltages, machine voltages, and machine currents. The nodal equation is given by:
233
01:21Three-Phase Short Circuit—Unloaded Synchronous Machine
238
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...
238