A fault diagnosis method for small pressurized water reactors based on long short-term memory networks

A fault diagnosis method for small pressurized water reactors based on long short-term memory networks
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基于长短期记忆网络的小型压水堆故障诊断方法

DOI:
10.1016/j.energy.2021.122298
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发表时间:
2022-01
期刊:
影响因子:
9
通讯作者:
Shifa Wu
Shifa Wu
中科院分区:
工程技术1区
文献类型:
--
作者:
Pengfei Wang;Jiaxuan Zha;Jiashuang Wan;Shifa Wu

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提出了一种小型压水堆(SPWR)传感器和执行器的故障诊断方法,利用长短期记忆(LSTM)网络建立了一种标记故障字典来映射复杂的故障模式。它可以直接从多变量时间序列数据中学习特征,并通过LSTM的循环行为和门机制捕捉长期依赖关系,实现SPWR的端到端故障诊断。在SPWR故障数据集上的实验结果表明,该方法能够有效地从原始时间序列信号中诊断传感器和执行器故障的位置、类型和程度,平均准确率为92.06%,优于其他三种广泛使用的故障诊断方法。此外,在注入不同噪声信号的SPWR故障数据集上的诊断结果表明,所建立的LSTM网络具有较强的抗噪能力。因此,该方法有望在SPWR的实际运行环境中获得令人满意的故障诊断性能。
This paper proposes a sensor and actuator fault diagnosis method for small pressurized water reactors (SPWRs), with an innovative labeled fault dictionary established to map complex fault modes, using long short-term memory (LSTM) networks. It can directly learn features from multivariable time-series data and capture long-term dependencies through the cyclic behavior and gate mechanism of LSTM to realize the end-to-end fault diagnosis of SPWRs. Experimental results on a SPWR fault dataset show that the method can effectively diagnose the location, type, and extent of sensor and actuator faults from raw time-series signals with an average accuracy of 92.06% and outperforms three other widely-used fault diagnosis methods. Furthermore, the diagnosis results on the SPWR fault dataset injected with different noise signals demonstrate the strong noise immunity capability of the established LSTM network. Therefore, the proposed method is expected to achieve satisfactory fault diagnosis performances in actual operating environments of SPWRs.
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