가상센서 기반 건물에너지시스템 이상검출을 위한 실물센서의 요구성능 분석 방법 = Analysis of the Required Performance of Physical Sensors for the Virtual Sensor-Based Fault Detection in Building Energy Systems

다국어 초록 (Multilingual Abstract)

This study proposes an analysis method to determine the performance of physical sensors required to achieve the target performance of the virtual sensor-based fault detection in building energy systems. The proposed method was applied through the building energy simulation with fault modeling. Simulation was performed using the Designbuilder and EnergyPlus tools. The simulated datasets consist of physical sensors and energy consumptions for the normal and faulty system conditions. The virtual sensor-based fault detection method was constructed for fouling faults in the target system, using the simulated datasets. Then, the required performance of the key physical sensors was analyzed by the proposed method under the different levels of random errors of temperature sensors in the virtual sensor-based fault detection of the chiller fouling. According to the case study, the accuracy of physical sensors has a great impact on the fault detection performance. In order to achieve the target performance of 90% detection for the fouling level of below 10%, the physical temperature sensors should have accuracy within ±0.5°C (random errors). This study shows the proposed method can be effectively used in the fault detection design stage, thus proving reliable fault detection performance under the physical sensor uncertainties in real operational systems.

참고문헌 (Reference)

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