A method of increasing the output power of a small wind power generator

Abstract

The invention discloses a method of increasing output power of a mini-type wind generator. When wind speed is greater than starting wind speed of the wind generator, the wind generator outputs three-phase alternating current, and the three-phase alternating current is converted into direct current through a rectifier bridge. A controller detects the direct current output by the rectifier bridge, when direct current voltage exceeds charging voltage, an analog switch of a by-pass circuit is switched on, and therefore the controller enables the direct current to be switched into a charging circuit through the by-pass circuit for charging a storage battery. If the direct current voltage output by the rectifier bridge is lower than the charging voltage, an analog switch of a boosting circuit is switched on, and therefore the controller enables the direct current to be switched into the charging circuit after the boosting circuit boosts the direct current. The method can ensure that the wind generator can operate when the wind speed is low, maximum output power can be obtained as the wind generator turns, wind energy is utilized effectively, and stable operation of a fan can be maintained.

Description

technical field [0001] The invention relates to a control strategy of wind power output power, in particular to a method for increasing the output power of a small wind power generator. Background technique [0002] Wind resource is an inexhaustible renewable energy, and it is a clean energy without air pollution or waste. Wind power generation is the most commonly used form of wind energy utilization, and it is also one of the power generation methods with the most mature technology, the most development conditions and commercialization prospects in new energy. Wind energy has a certain kinetic energy. When the wind wheel rotates, the wind energy is converted into mechanical energy, and then the generator is driven to generate electricity, and then a stable DC power is obtained through uncontrollable three-phase rectifiers and other equipment. The converter outputs AC power to supply AC loads. However, due to the uncertainty of the natural wind, the wind speed changes irr...

AI Technical Summary

Problems solved by technology

However, due to the uncertainty of the natural wind, the wind speed changes irregularly with time, sometimes the wind is strong, sometimes the wind is small, or there is no wind, and the output voltage of the wind turbine is very unstable.

Especially when the wind speed is low, the output voltage is low and cannot reach the operating voltage of the load, and cannot supply power to the load. At this time, the wind energy cannot be fully utilized.

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