Stand-by battery pack on-line monitoring device of large-size wind generator set variable-pitch controller

Abstract

The invention relates to a wind power generating set, particularly a stand-by battery on-line monitoring device of a large-size wind generator set variable-pitch controller. Each battery pack is correspondingly connected with a battery manager; each battery manager is connected with a PLC (programmable logic controller) through a CAN (Controller Area Network) bus; the PLC is connected with a main control system through a fiber; and a wind farm control center and a user monitoring interface LCD (liquid crystal display) are connected to the main control system. The invention can perform on-line intelligent charging / discharging management and parameter / state communication on the battery packs, and ensure the battery packs to be in a good state within the service life; and meanwhile, the main control system can master the capacity and good or bad state of each battery pack and each battery in time, thereby performing prewarning or replacing the batteries in time, and further ensuring the safety, reliability and efficient operation of the blower.

Description

[0001] technical field [0002] The invention relates to wind power generation equipment, in particular to an on-line monitoring device for a backup battery pack of a pitch controller of a large wind power generating set. Background technique [0003] In the modern wind power generation system, the pitch control system is the key to ensure the safe operation of the wind turbine, and is the core unit of the wind power control system. When the pitch control system fails, the battery pack is an important emergency power supply unit for the pitch control system, which can ensure the emergency retraction of the pitch control system. However, if the battery pack cannot be properly managed and used, overcharge, overdischarge and battery aging will occur, which will lead to battery damage or a sharp drop in battery capacity, thus affecting the normal power supply of emergency propellers. [0004] However, among the existing charge and discharge management devices for battery packs ...

AI Technical Summary

Problems solved by technology

However, if the battery pack cannot be properly managed and used, overcharging, overdischarging, and battery aging will cause battery damage or a sharp drop in battery capacity, which will affect the normal power supply of the emergency paddle.

[0004] However, among the existing charge and discharge management devices for battery packs (especially with multiple cells), there is no mature product for single-cell cycle high-voltage PWM pulse charge and discharge devices.

For a multi-cell battery pack, the series charging method is often used, which requires the consistency of the batteries to be extremely high, otherwise some batteries will be overcharged, the substrate will be salinized, and some batteries will not be fully charged, so that the battery pack will not be able to exert the best energy efficiency. Lifetime reliability of battery packs

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