Wind-solar energy source intelligent controller based on three-phase dual-voltage rectification

Abstract

The invention discloses a wind-solar energy source intelligent controller based on three-phase dual-voltage rectification, which is characterized in that a control center used for monitoring circuit conditions and controlling the charge-discharge modes of a storage battery is arranged; the three-phase alternating-current (AC) signal of a wind power generator is input from an AC input interface and enters a DC / DC switching circuit after passing through a three-phase dual-voltage rectification filter circuit; the DC signal of a solar-cell panel is input from a DC input interface and enters the DC / DC switching circuit after passing through the three-phase dual-voltage rectification filter circuit; the control center detects voltage current in the circuits, controls the rectification mode of the three-phase dual-voltage rectification filter circuit, regulates a PWM (Pulse-Width Modulation) signal, controls the charge-discharge modes and displays the circuit conditions. The three-phase dual-voltage rectification filter circuit comprises a rectification bridge, a selector switch, an energy storage filter capacitor, a sampling circuit and a control circuit. The invention automatically switches the rectification modes according to the magnitude of wind energy input voltage, which makes the controller have high-efficiency stable power output at the low-wind speed starting stage and the rated revolution stage of the wind power generator.

Description

technical field [0001] The invention is an intelligent controller for wind and solar energy based on three-phase dual-voltage rectification, and relates to the technical field of storage and utilization of uncertain energy sources such as wind energy and solar energy. Road monitoring, wind and solar complementary independent power supply and other fields. Background technique [0002] The development of renewable energy such as wind energy and solar energy is an important measure to alleviate energy conflicts and a strategic decision for the sustainable development of energy in all countries in the world. The wind-solar hybrid system is the best choice for effectively utilizing wind energy and light energy. However, wind energy and solar energy are usually limited by natural conditions, which not only vary widely in regions, but also have strong uncertainties over time. Correspondingly, the converted voltage, current and power also have strong uncertainties. sex. [0003] ...

AI Technical Summary

Problems solved by technology

However, the rectified output of this rectification circuit is still a direct current that fluctuates greatly with wind speed, and the subsequent DC / DC module can only convert direct current that fluctuates within a certain range, which will cause waste

There are two possible cases: one case is to increase the input voltage range of the subsequent DC / DC module, which will not only increase the difficulty of DC / DC module design, but also reduce the efficiency of the DC / DC module; the other case is If the input voltage range of the subsequent DC / DC module is not increased, then, in order to ensure the efficiency of the controller at the rated wind speed of the wind turbine, it will be difficult to charge the battery during the low wind speed start-up phase of the wind turbine.

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