Load control method based on electric water heater load group model

Abstract

The invention discloses a load control method based on an electric water heater load group model. The method comprises the following steps that 1), an electric water heater model with water flowing ina water tank considered is established; 2), clustering is carried out on electric water heater indexes in a load dispatching center control area on the basis of probability distribution, and an electric water heater load group probability model is established; 3), a heat storage state variable of the electric water heater and a calculation method of the heat storage state variable are defined according to the water temperature in the electric water heater; and 4), controllable subsets of the water heater load group are selected according to the extent of the heat storage state of the water heater in the load group, the controllable subsets of the load group of the water heater are sequenced on the basis of a sequencing method taking the comfort level of a user into consideration, and theload control is completed according to the sequencing result. According to the method, due to the fact that the temperature distribution and the natural convection process in the electric water heaterare considered, the model is objective and accurate; and the heat storage state is defined, so that the comfort level of the user is guaranteed to a certain extent, and a great assistant effect is applied for propelling the temperature control to reach and participate in the power grid frequency control.

Description

technical field [0001] The invention relates to the technical field of grid load side response, in particular to a load control method based on an electric water heater load group model. Background technique [0002] With the rapid development of social economy, the total load is increasing day by day, the diversity of load is gradually enhanced, and the access scale of distributed new energy is also gradually expanding. In addition, with the continuous development of electricity marketization and the continuous advancement of the construction of the global energy Internet, the system stability problems brought about by the grid interconnection are becoming more and more prominent. The security and stability of the power grid is increasingly challenged, for which many concepts and technologies have been proposed. Among them, some researchers proposed that loads should actively participate in the coordination and interaction of the power grid, so as to realize the balance be...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the deficiencies in the prior art, the present invention provides a load control method based on the electric water heater load group model, which solves the problem that the research on the current electric water heater load model is relatively single, and there is no mature load control method, and promotes the active load control of electric water heaters. In response to the development of technology, it is of great significance to strengthen the friendly interaction between the power generation side and the power consumption side in the smart grid, so as to realize the safe, stable and efficient operation of the power grid

Images