METHOD FOR ONLINE MODELING OF HEAT PUMP SYSTEM BASED ON DATA AND DEVICE THEREOF

The invention discloses a data-based heat pump system online modeling method and device. The method comprises the following steps: acquiring historical observation data of a heat pump system; clustering processing is carried out on historical observation data of the heat pump system to obtain K class clusters, and an optimal clustering center is solved for each class cluster; taking the optimal clustering center as observation data for heat pump system model parameter identification; taking the sum of squares of errors of actual output values and output observation data of the model as an optimization objective function, taking boundaries of input and output observation data of the model as constraint conditions, converting a model parameter identification problem into a nonlinear optimization problem with constraints, and solving the nonlinear optimization problem to obtain an optimal solution of the objective function, so as to obtain an optimal solution of the objective function; unknown parameters in the model are identified, and building of the heat pump system model is completed; and obtaining online observation data, and performing parameter identification on the established heat pump system model based on the online observation data. Through clustering analysis, a large amount of observation data is reduced, and the speed and precision of model parameter identification are improved.