Stator winding temperature correction method and device based on temperature field simulation model

Abstract

The invention discloses a stator winding temperature correction method and device based on a temperature field simulation model, and the method comprises the steps: carrying out the temperature correction of a stator winding according to a pre-built three-dimensional temperature field simulation model of the stator winding; obtaining the simulation temperature difference value of the temperature measuring point before transformation and the temperature measuring point after transformation of the stator winding under the set boundary condition through simulation calculation; obtaining historical temperature data and newly-collected temperature data, and obtaining the actual temperature difference value of the temperature measuring point before transformation and the temperature measuring point after transformation under the same operation condition through combination and comparison; correcting the three-dimensional temperature field simulation model according to an absolute error value between the simulation temperature difference value and the actual temperature difference value; and correcting the stator winding temperature received by the monitoring system in real time according to the corrected three-dimensional temperature field simulation model. According to the invention, the temperature measurement accuracy of the stator winding is improved.

Description

technical field [0001] The invention relates to the technical field of electric power industry, in particular to a method and device for correcting the temperature of a stator winding based on a simulation model of a temperature field. Background technique [0002] The hydro-generator is the main power equipment in the hydroelectric power station. When the generator is manufactured, the temperature-measuring element is pre-buried in the interlayer insulation between the upper-layer wire rod and the lower-layer wire rod of the stator winding, such as figure 1 As shown, since the generator runs in harsh environments such as high temperature, vibration, and oil corrosion for a long time, it is easy to cause damage to the temperature measuring element, resulting in inaccurate temperature measurement. After the temperature measuring element is damaged, if it needs to be replaced, the stator bar needs to be pulled out, which is equivalent to disassembling and reassembling the core...

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Problems solved by technology

[0006] The purpose of the embodiments of the present invention is to provide a stator winding temperature correction method, device, electronic equipment, and storage medium based on a temperature field simulation model to solve the problem of errors in temperature measurement in the prior art

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