Low-cost energy meter calibration method for measurement and verification

摘要

Energy meters need to be calibrated for use in Measurement and Verification (M&V) projects. However, calibration can be prohibitivelyexpensive and a ect project feasibility negatively. This study presents a novel low-cost in-situ meter data calibrationtechnique using a relatively low accuracy commercial energy meter as a calibrator. Calibration is achieved by combining two machinelearning tools: the SIMulation EXtrapolation (SIMEX) Measurement Error Model and Bayesian regression. The model istrained or calibrated on half-hourly building energy data for 24 hours. Measurements are then compared to the true values overthe following months to verify the method. Results show that the hybrid method significantly improves parameter estimates andgoodness of fit when compared to Ordinary Least Squares regression or standard SIMEX. This study also addresses the e ectof mismeasurement in energy monitoring, and implements a powerful technique for mitigating the bias that arises because of it.Meters calibrated by the technique presented have adequate accuracy for most M&V applications, at a significantly lower cost.