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首页> 外文会议>International IEEE Conference and Workshop in Obuda on Electrical and Power Engineering >Evaluation of Thermally Aged Nuclear Power Plant Power Cables Based on Electrical Condition Monitoring and Regression Analysis
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Evaluation of Thermally Aged Nuclear Power Plant Power Cables Based on Electrical Condition Monitoring and Regression Analysis

机译：基于电气状态监测和回归分析的核电厂热老化电缆评估

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摘要

The safe operation of nuclear power plants relies on many components such as nuclear reactors, heat exchangers, concrete structure and thousands of kilometers of instrumentation, control and low voltage power cables. The severe operating conditions in the nuclear power plants which characterized by high radiation levels and elevated temperature affect the insulation integrity of these cables, therefore, the condition monitoring of these cables has a particular concern. In this research, low voltage nuclear power plant power cables were thermally accelerated aged for different aging periods to simulate different service periods. The effect of the thermal aging on these cables was investigated using the extended voltage response method where two parameters were measured, the slope of decay and return voltages. The results showed that the voltage decay slope increased with increasing the aging period while the return voltage slope decreased. The estimated values of the return voltage slope were calculated using the parameters obtained from the regression analysis and this showed a strong correlation with the aging and polarization processes.
机译：核电厂的安全运行取决于许多组件，例如核反应堆，热交换器，混凝土结构以及数千公里的仪表，控制和低压电力电缆。核电厂的严酷操作条件（其特征在于高辐射水平和高温）会影响这些电缆的绝缘完整性，因此，对这些电缆的状态进行监视尤为重要。在这项研究中，对低压核电站电力电缆进行了热加速老化，以使其具有不同的老化周期，以模拟不同的服务周期。使用扩展电压响应方法研究了热老化对这些电缆的影响，其中测量了两个参数，即衰减斜率和返回电压。结果表明，电压衰减斜率随着老化时间的增加而增大，而返回电压斜率减小。使用从回归分析获得的参数计算返回电压斜率的估计值，这显示出与老化和极化过程密切相关。

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