Electrocorrosion test device and test method for generator stator end material

Abstract

The invention discloses an electric corrosion test device and test method for the end material of a generator stator, which includes a test box and an insulation test bench supported inside it. Several plate electrode samples are arranged on the top surface of the insulation test bench. A knife electrode is suspended on the top of each plate electrode sample, the knife electrode is connected to the AC high-voltage power supply, the test box is connected to the humidity adjustment device, and the environment detection device is installed in the test box, and the humidity adjustment device and the environment detection device are respectively connected to the controller; Simulate the corona discharge existing at the end of the stator winding of an air-cooled high-voltage generator to corrode the anti-corona or covering material at the end, and describe the long-term discharge conditions at the end according to the dielectric and physical and chemical properties of the anti-corona or covering material during the test. Corrosion process and corrosion degree of anti-corrosion or covering materials under different environmental factors such as humidity and ozone concentration, to provide a reference for the later maintenance of air-cooled generator sets.

Description

technical field [0001] The invention belongs to the technical field of high-voltage motor insulation, in particular to an electric corrosion test device and a test method for a generator stator end material. Background technique [0002] The rapid development of the power industry in recent years has driven the demand for high-voltage and large-capacity generators. Generator sets, as key equipment in the power system, have increased in capacity and rated voltage levels, and have higher and higher requirements for the insulation level and operational reliability of the generator set. The insulation structure at the end of the stator winding of the high-voltage generator is similar to the bushing type, and the electric field distribution on the surface of the winding is extremely uneven, which is the weak link in the insulation of the motor. Local corona discharge occurs when the local field strength exceeds the critical breakdown field strength of air. During corona discharg...

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Problems solved by technology

[0005] Aiming at the problem of lack of corrosion testing device for generator stator end material, the present invention provides an electric corrosion test device and test method for generator stator end material, which can simulate the damage of motor stator end material under different operating conditions of the generator set. Corrosion parameters, and then analyze the corrosion mechanism and the influence of air humidity on the corrosion process, to provide a theoretical basis for the design optimization of the anti-corona structure

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