Empirical Study on Structure Equation Type Load Model Using Actual High Sampling Rate Measurement

Abstract

Abstract According as a large amount of renewable energy is introduced in the electric power system, voltage stability has been attracting attentions in a complex real system. This paper proposes a new load model based on structural equations in place of the conventional ZIP models. In the proposed model, the reactive power is included in the formula for explaining the active power. On the contrary, the active power is applied in the expression explaining the reactive power. Furthermore, to estimate this structural equation without bias, variables are selected by considering the identification of the explanatory expression using the measured value. In order to model the change of the load due to the change in the voltage and frequency of the power supply system side, the high sampling measurement value are utilized in the numerical experiment for which are executed at a residence and a laboratory.