The transmission line in a power network is similar to a blood vessel. Any disconnection ultimately affects the transmission of electrical energy, and broken strands and detachment of the fittings are early signs of disconnection. Because aeolian vibration occurs on almost all conductors, an aeolian vibration‐based structural health‐monitoring technology for transmission lines is proposed. First, the influence of strand breakage and detachment of the fittings on the natural frequency of the conductor is described, and the influence of temperature changes on the natural frequency is discussed from the two aspects of the temperature‐dependent elastic modulus and temperature‐dependent winding angle. Second, we conducted a vibration experiment and found the law of natural frequency variation caused by broken strands, detachment of the fittings, and temperature changes. Finally, we conducted a field test to measure the conductor vibration on a 110‐kV transmission line. The results show that the natural frequency can be calculated multiple times by the stochastic subspace identification method, and the calculation results are consistent. After a period of measurement, the natural frequency variation is analyzed. Further, how to determine the structural health of the conductor from the natural frequency measured by the technique under actual operating conditions is explained.

中文翻译：

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基于风振的传输线导体结构健康监测系统

电网中的传输线类似于血管。任何断开都会最终影响电能的传输，并且断线和配件分离是断开的早期迹象。由于风振几乎发生在所有导体上，因此提出了一种基于风振的传输线结构健康监测技术。首先，描述了绞合线的断裂和分离对导体固有频率的影响，并从温度相关弹性模量和温度相关绕组的两个方面探讨了温度变化对导体固有频率的影响。角度。其次，我们进行了振动实验，发现了由股线折断，配件脱落引起的固有频率变化规律，和温度变化。最后，我们进行了现场测试，以测量110kV输电线路上的导体振动。结果表明，随机子空间识别方法可以多次计算固有频率，计算结果是一致的。经过一段时间的测量后，将分析固有频率变化。此外，说明了如何根据在实际操作条件下通过该技术测得的固有频率来确定导体的结构健康状况。分析固有频率变化。此外，说明了如何根据在实际操作条件下通过该技术测得的固有频率来确定导体的结构健康状况。分析固有频率变化。此外，说明了如何根据在实际操作条件下通过该技术测得的固有频率来确定导体的结构健康状况。