Double-fed wind power generator frequency closed-loop control experiment device and control method

Abstract

The invention discloses a double-fed wind power generator frequency closed-loop control experiment device which comprises a PLC (programmable logic controller), an asynchronous motor, a double-fed wind power generator, a dragging frequency changer, a power distribution cabinet, a rotor-side excitation frequency changer, an electricity energy quality analyzer and switch cabinet, a coaxial coupler and a motor support thereof. Realtime wind conditions of a weather station are collected, data are transmitted to the PLC, conditions of propeller blades and wind wheels of an actual wind power generator are simulated, the controller simulates and calculates output of the wind wheels and outputs rotating torque and rotating speed data to the dragging frequency changer, the dragging frequency changer drives the asynchronous motor to rotate, the asynchronous motor coaxially drags the power generator for power generation, a stator side of the rotor-side excitation frequency changer of the power generator is connected in a load cabinet through a protecting device, and rotor-side excitation current is acquired by calculating frequency of the motor and output frequency of a stator of the power generator. Frequency closed-loop control is realized, frequency of the stator is ensured to be output constantly, and a double-fed working mode of a rotor side is realized through a brake resistor or an energy feedback power grid.

Description

technical field [0001] The invention belongs to the field of wind power generation experimental equipment and instruments, and in particular relates to a dynamic model experimental device and a control method for realizing frequency closed-loop control and electric energy quality detection in the energy conversion process of double-fed wind power generation. Background technique [0002] As wind power generator technology has attracted much attention from countries and countries in renewable energy power generation, how to study wind power technology more directly and effectively is the focus and difficulty faced by researchers. In view of the location and special environment of the wind farm, it is impossible to successfully complete the experimental task. Such natural conditions and field conditions have brought great difficulties to the experimental conditions. It is imminent to build an energy conversion test bench in the laboratory, to simulate the sudden change and unc...

AI Technical Summary

Problems solved by technology

[0004] So far, most of the existing test benches only complete the relevant experiments of a power generation system, ignoring the independence of the functions of each part of the doubly-fed generator system, the cost performance is not very high, and there are problems such as poor effect

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