Calculation method and device for whole power loss of wind turbine generator

Abstract

The invention provides a calculation method and device for whole power loss of a wind turbine generator. The method comprises steps: the motor iron loss generated by a motor iron core in the wind turbine generator is acquired; the motor copper loss corresponding to electrifying current and generated after a motor electronic winding in the wind turbine generator is electrified is acquired; the tower cable loss corresponding to the electrifying current and generated by a tower cable in the wind turbine generator is acquired; the self power loss of the wind turbine generator and the converter system power loss are acquired; and the sum of the motor iron loss, the motor copper loss, the tower cable loss, the self power loss and the converter system power loss is determined to be the total power loss of the whole wind turbine generator. According to the calculation method and the device for the whole power loss of the wind turbine generator, different part configuration in the wind turbinegenerator, different operation states or environment temperature changes are considered, the calculated power loss is more accurate and reliable, and the wind turbine generator design quality and theefficiency are ensured.

Description

technical field [0001] The invention relates to the technical field of wind power, in particular to a method and device for calculating the power loss of a wind power generating set. Background technique [0002] In the design and development stage of wind turbines, the power loss of wind turbines is very critical to the process of wind turbine load and strength evaluation and economic evaluation. The power loss of the whole machine will also change significantly under different operating states of the unit and under different environmental parameters. [0003] In the prior art, the loss of the main components that cause the loss of the unit is estimated separately and then linearly superimposed to obtain the power loss of the wind turbine; however, since the power loss of the wind turbine mainly includes: motor loss, mechanical loss, electrical control System loss, cable loss, loss of the unit itself, etc.; and the main unit components that affect the loss of the wind turb...

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Problems solved by technology

[0003] In the prior art, the loss of the main components that cause the loss of the unit is estimated separately and then linearly superimposed to obtain the power loss of the wind turbine; however, since the power loss of the wind turbine mainly includes: motor loss, mechanical loss, electrical control System loss, cable loss, loss of the unit itself, etc.; and the main unit components that affect the loss of the wind turbine include: blades, generators, bearings, converters, cables, pitch motors, yaw motors, the unit’s own lighting, unit Cooling devices, etc.; the main factors affecting the loss of wind turbines mainly include: blade aerodynamic characteristics, motor model, tower cable model, unit operating speed range, unit power, power consumption of unit components, ambient temperature, etc.; therefore, the existing It is difficult to accurately, flexibly, and systematically consider the configuration of different components of the unit and the influence of different operating states of the unit or changes in ambient temperature on the power loss of the whole machine, so that the obtained wind power The overall power loss of the generator set is inaccurate, which in turn reduces the design quality and efficiency of the wind turbine

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