Simulating Waveforms of Electrical Loads via Current Superposition

In this paper, we propose a method for simulating waveforms of power loads. The simulation is based on the voltage and current waveforms that are measured in practice. To ensure the consistency of the measured waveforms, we process them by phase alignment and amplitude modulation. As the processed voltage waveform is the same for every individual load, we focus on only the simulation of the current waveform. First, the measured current waveforms are properly filtered for the purpose of denoising. Then, by analyzing the electrical characteristics (e.g., power, etc.), the transient and steady-state components of the current waveform are extracted. Using the extracted components, the single-load waveform with adjustable data length can be simulated. For simulating multi-load waveform, the current waveform of one load is taken as the initial waveform, and the current waveforms of the other loads are linearly superposed according to their on-off statuses and working hours. By comparing the electrical characteristics of the measured and the simulated waveforms, we show that the simulation method has a reliable performance.