Li-ion battery energy storage controller of wind generating set

A technology for wind turbines and controllers, applied in current collectors, battery circuit devices, electric vehicles, etc., can solve problems such as reducing the normal service life of batteries, inability to ensure battery charging, and inability to charge and store energy, so as to prevent irreparable damage damage, output voltage or output current is stable, and the effect of protecting the battery

CN103346609BActive Publication Date: 2015-07-08HENAN UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2015-07-08

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Abstract

A Li-ion battery energy storage controller of a wind generating set comprises a rectifying circuit and a buck chopper circuit connected with the rectifying circuit. The buck chopper circuit is connected to a Li-ion battery through a current converting switch tube. The Li-ion battery energy storage controller of the wind generating set further comprises a capacitive snubber circuit and a corresponding control circuit, and the capacitive snubber circuit is connected to the output end of the buck chopper circuit. The corresponding control circuit comprises a PLC control unit which comprises a segmentation charging control circuit, and the segmentation charging control circuit is used for controlling the charging process of the Li-ion battery, namely, the charging process is of carrying out constant current charging first and constant voltage charging second. A dynamic compensation cache control circuit is used for controlling the energy storing and compensating working process of the snubber circuit. The Li-ion battery energy storage controller of the wind generating set further comprises a logical judgment unit for controlling the on-off of the current converting switches of a whole main circuit. According to the Li-ion battery energy storage controller of the wind generating set, the charging of the Li-ion battery can be guaranteed to be carried out safely and effectively, buffer storage can be carried out on energy when output power of the wind generating set is too small in a low wind speed, and energy conversion efficiency of the wind generating set is greatly improved.
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Description

technical field

[0001] The invention relates to a controller for wind power generation energy storage equipment, in particular to a lithium battery energy storage controller for an off-grid direct drive wind power generator. Background technique

[0002] The energy crisis in the world is getting worse day by day. With the excessive use of fossil energy, environmental problems are becoming more and more prominent. Therefore, the governments of various countries have also begun to seek the development of various clean energy sources, among which new forms of clean energy such as wind energy, solar energy, and nuclear energy have become the focus of people's attention and development. Compared with the characteristics of different forms of new energy, wind energy development has become the power generation method with the most large-scale development conditions and commercial development prospects due to its advantages of low cost, high safety, and large-scale development. [...

Examples

Embodiment Construction

[0028] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0029] As shown in the figure, the lithium battery energy storage controller of the wind turbine includes:

[0030] Rectifier circuit 1, described rectifier circuit 1 is a bridge rectifier circuit, and the rectifier diode is uncontrollable; as figure 2 As shown, the bridge rectifier circuit 1 in this specific embodiment is composed of six uncontrollable diodes D1, D2, D3, D4, D5, and D6 connected, and the AC input end of the rectifier circuit 1 is connected to the three-phase output of the wind turbine. end.

[0031] step-down chopper circuit 2, such as figure 2As shown, the step-down chopper circuit 2 in this specific embodiment includes a step-down chopper circuit filter capacitor C1, a step-down chopper circuit commutation switch IGBT S1, a step-down chopper circuit rectifier diode D7 and a storage energy inductance L1; on...