Wind power generating set electric energy information acquisition device, system and method

Abstract

The invention discloses a wind power generating set electric energy information acquisition device, system and method. The acquisition device comprises a smart electric meter for receiving electric energy signal sampling values of a specific sampling position in a wind power generating set and collected according to a preset acquisition period. The smart electric meter comprises a main control chip. The main control chip is used for determining a signal zero crossing point according to the electric energy signal sampling values, determining the number of target sampling points in each signal period according to signal sampling values of two sampling points before and after the signal zero crossing point, and carrying out calculation according to the sampling period and the number of the target sampling points to obtain signal instantaneous frequency of the corresponding signal period. Through the acquisition device, system and method, accurate measurement of the instantaneous frequencyof the electric energy signal in the wind power generating set is realized, and monitoring requirements of frequency conversion electric energy signal are met.

Description

technical field [0001] The invention relates to the technical field of electric energy information collection, in particular to a device, system and method for collecting electric energy information of a wind power generating set. Background technique [0002] Under the background of energy and environmental crisis becoming more and more prominent, wind power generation is developing rapidly all over the world. Compared with the doubly-fed wind power generation system, the permanent magnet direct drive wind power generation system adopts the way of direct connection between the motor and the impeller, which eliminates the traditional component of the gearbox, so that it has high efficiency, low noise, and low wind speed. Long service life, reduced operation and maintenance costs and many other advantages have become another research hotspot. [0003] The intermittence of wind power and the power quality of the power grid have brought great challenges to the normal operation...

AI Technical Summary

Problems solved by technology

With the real-time change of wind power, the frequency of the electric energy signal on the motor side will also change, that is, the electric energy signal on the electric motor side is a variable frequency signal. At present, the existing electric energy information collection device is difficult to meet the monitoring requirements of the variable frequency electric energy signal on the electric motor side.

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