INSTRUMENTATION FOR HIGH-PERFORMANCE NONINTRUSIVE ELECTRICAL LOAD MONITORING

This paper reviews the design and implementation of hardware and softw are tools for nonintrusive electrical load monitoring. Estimates of sp ectral content in measured waveforms can be used to determine in real time the operating schedule of loads at a target site. Techniques for transient event detection are reviewed. These techniques can detect th e turn-on and turn-off transients of individual loads, and can be used to easily determine the energy usage of loads that draw constant powe r in steady-state operation. Techniques for monitoring the power consu mption of smoothly varying lends (e.g., variable speed drives) using s pectral estimates are also discussed.