PEBB modular structure for wind power converter, parallel connection structure of PEBB modular structures and appearance structure of PEBB modular structure

Abstract

The invention discloses an intelligent PEBB modular structure for a wind power converter. The intelligent PEBB modular structure for the wind power converter comprises three IGBT modules, three drive circuits, three current-sharing inductor groups, three current sensors, a direct-current voltage sensor, a direct-current supporting capacitor, a direct-current side capacitor, an auxiliary power supply and a bottom layer control panel, wherein each current-sharing inductor group comprises three current-sharing inductors. According to the intelligent PEBB modular structure for the wind power converter, on the basis of modularization, the bottom layer intelligent control function is achieved, the power level of the converter is improved, the maintenance process is simplified, the on-line intelligent diagnosis function is also achieved by the wind power converter, and therefore workers can grasp the working condition of modules which are connected in parallel in time. The invention further discloses a mutual parallel connection structure of a plurality of intelligent PEBB modular structures, wherein the mutual parallel connection structure is suitable for double-fed converters with different power demands and full-power converters with different power demands. In addition, the invention discloses an appearance structure of the intelligent PEBB modular structure; in this way, the modular size is reduced, cost is reduced, and practicability is improved.

Description

technical field [0001] The invention relates to the field of wind power, in particular to a standardized intelligent PEBB (power electronic building block, power electronic building block) modular structure applied to a wind power converter. Background technique [0002] Nowadays, most of the domestic wind power converter research is based on discrete electronic devices, such as power switching elements, control circuits, protection circuits, sensing circuits, etc. These devices are specially designed according to the different purposes and requirements of users However, the use of non-standard devices has many shortcomings and shortcomings. For example, discrete electronic devices often have a long development cycle, high cost, and inflexible use, which greatly limits the development of power electronics to a certain extent. [0003] If the wind power converter uses discrete components, once a fault occurs, it will be difficult to identify the faulty component, and it is di...

AI Technical Summary

Problems solved by technology

However, the existing wind power converter PEBB does not contain intelligent fault diagnosis function, and cannot quickly and effectively obtain fault information and determine the fault location when the converter fails

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