This paper concerns the use of Transient Test‐Based Techniques (TTBTs) for fault detection in a long transmission main. It reports the results of two series of transient tests executed in a real and operating pipe system. Because of the complexity of the investigated pipeline that includes several stubs, different pressure wave generators were used at both the end sections. Precisely, transients were caused by a pump shut‐down and the Portable Pressure Wave Maker device. The analysis of the results shows that, according to the characteristics of the transient tests and the investigated system, only a part of the system can be explored properly from a given generation point. The proposed test procedure allows overcoming the negative effect of a change in the initial and boundary conditions. In fact, contrary to laboratory, in a real system, it is quite impossible to repeat tests in the same flow conditions. The success of the survey—with two leaks detected with a good precision—confirms the potential of the TTBTs for fault detection in real systems.

中文翻译：

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通过瞬态测试在实际变速箱中进行泄漏检测：行为和不当行为

本文涉及将基于瞬态测试的技术（TTBT）用于长距离输电干线中的故障检测。它报告了在实际和运行中的管道系统中执行的两个系列瞬态测试的结果。由于所研究的包括多个分支的管道的复杂性，在两个端部使用了不同的压力波发生器。准确地说，瞬态是由泵关闭和便携式压力波发生器设备引起的。结果分析表明，根据瞬态测试和所研究系统的特征，从给定的生成点可以正确地探索系统的一部分。建议的测试程序可以克服初始条件和边界条件变化的负面影响。实际上，与实验室相反，在实际系统中，在相同的流量条件下重复测试是完全不可能的。这项调查的成功-精确地检测到两次泄漏-证实了TTBT在实际系统中进行故障检测的潜力。