Event Detection Methods for Nonintrusive Load Monitoring in Smart Metering: Using the Improved CUSUM Algorithm

In order to ensure the full demand of electrical energy consumption, effective measures shall be taken to increase the utilization rate of electricity while saving it rationally. Thus, nonintrusive load monitoring (NILM) came into being with its important part and event detection. Traditional event detection algorithms based on current differences are not sensitive to detect switching events for smaller power loads. Therefore, this paper proposes an improved CUSUM algorithm for NILM, when in noload test, the allowable offset of the algorithm is reduced so that it can detect the load of smaller power. On the contrary, this offset will increases slightly for the purpose of reducing noise interference.