A load control method and device for a facility agricultural DC power supply network

Abstract

The invention provides a load control method and device of a facility agriculture DC power supply network. The method comprises the following steps: obtaining the unit capacity, the load stable powerand the instantaneous impulse power of each load type of the facility agriculture DC power supply network; the load type comprises constant voltage load and constant power load; determining the integral time constant and proportional coefficient of the load type PI controller according to the unit capacity, the load stable power and the instantaneous impulse power; and determining the PI control model of the load type PI controller according to the integral time constant and the proportional coefficient, and achieving the load control according to the PI control model. The embodiment of the invention obtains the integral time constant and the proportional coefficient of the load type PI controller through the unit capacity of each load type, the load stable power and the instantaneous impulse power, realizes the parameter tuning of the PI controller, and thus realizes the load control in the facility agriculture DC power supply network.

Description

technical field [0001] The invention relates to the field of electric power technology, and more specifically, to a load control method and device for a facility agricultural DC power supply network. Background technique [0002] With the rapid development of distributed energy, micro-grid technology and photovoltaic power generation technology, my country's facility agriculture has become the world's largest project using solar energy. With the access of a large number of controllable loads in the facility agricultural DC power supply network, the power quality of the distribution network and the reliability of the distribution network are reduced, so the research on the coordinated control technology of loads in the DC power supply network is of great significance. [0003] In the prior art, the linear PI control is still a load coordination control method commonly used in the facility agricultural DC power supply network. However, there are still some problems in the appl...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, the linear PI control is still a load coordination control method commonly used in the facility agricultural DC power supply network. However, there are still some problems in the application process of the linear PI control in the prior art, such as the difficulty in setting the control parameters and the order There is an overshoot in the step response; for the overshoot problem of the step response in the linear PI control, the tracking differentiator is used to arrange the transition process for the step reference in the prior art to realize the non-overshoot control, but this method still has the control parameter adjustment Difficult problems, still not applicable to practical engineering needs

[0004] Therefore, the difficulty in parameter tuning of PI controllers in DC power supply networks for facility agriculture has become an urgent problem to be solved.

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