Rotation-speed control self-adaption optimizing method of wind-power variable-speed constant-frequency unit

Abstract

The invention provides a rotation-speed control self-adaption optimizing method of a wind-power variable-speed constant-frequency unit. Effective information is screened out of wind-power variable-speed constant-frequency unit operation data, the unit optimal rotation-speed range operation knowledge is obtained through an inference machine driven by data in a PLC control system, and thus a rotation-speed-torque control curved line is adjusted automatically. The problem of optimal rotation-speed tacking deviation brought by pneumatic characteristic change caused by blade manufacturing, installation and aging, mechanical loss characteristic change of a transmission system and electric loss characteristic change of a power generator and a converter are solved, absorbed Cp of a variable-speed range impeller can be maximized, and the purpose of improving unit low-wind-speed power generation efficiency is achieved.

Description

technical field [0001] The invention relates to an adaptive optimization method for the speed control of a wind power variable speed constant frequency unit. Background technique [0002] In recent years, with the prominent phenomenon of wind power curtailment and curtailment of wind power, my country's wind power industry policy has shifted from speed to quality, and from the Three North regions to the low wind speed regions in the central and eastern regions. The R&D and commissioning of low-speed wind turbines have become the focus of wind power enterprises. [0003] At present, wind power generator sets generally adopt variable speed and fixed propeller control at low wind speeds, and through the change of generator torque, the turbine impellers can absorb wind energy with maximum efficiency. However, the huge inertia of the impeller, the deviation between the actual unit and the model, the measurement device and the execution error of the mechanism will all affect the ...

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Problems solved by technology

[0006] The above methods rely on the derivation and calculation of ideal theoretical formulas when optimizing the torque control, ignoring the changes in the aerodynamic characteristics caused by the manufacturing, installation and aging of the blades of the actual unit on site, the changes in the mechanical loss characteristics of the transmission system, and the electrical losses of the generator and converter. The problem of optimal speed tracking deviation caused by characteristic changes, and some other methods also require special information collection devices, which increase equipment costs

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