Feasibility Study on the Characterization of Electric Load including Inverter Air Conditioner with a Synthetic Load Model

With economic development, the proportion of inverter air conditioners in load components has been increasing year by year. To analyze the influence of inverter air conditioners on the safe and stable operation of the power grid, the dynamic characteristics of an inverter air conditioner must be accurately characterized in the load model. At present, the synthetic load model (SLM) directly considering the distribution network is recommended in the power system simulation analysis, among which the static load model and the motor model are used to characterize the electrical equipment. Based on the voltage sag experimental results of a single inverter air conditioner, the key parameters of SLM are identified in cooling mode, heat pump mode and electric auxiliary heating mode, and the feasibility of SLM to characterize the load including inverter air conditioner is verified. The possible problems and solutions when using SLM to characterize the traditional load and inverter air conditioning load are discussed.