Insulating oil vfto compound overvoltage withstand pulse interval ratio test device and method
A technology of pulse interval and test device, which is applied in the direction of measuring device, measuring electricity, measuring electrical variables, etc., can solve the problem of inability to accurately obtain the insulating strength of insulating oil and so on.
Active Publication Date: 2020-08-28
YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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[0005] This application provides a test device and method for the VFTO composite overvoltage withstand pulse interval ratio test device and method of insulating oil to solve the problem in the traditional technology that the dielectric strength of insulating oil under the action of VFTO cannot be accurately obtained after lightning flashover
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[0021] The application will be described in detail below in conjunction with the accompanying drawings.
[0022] like figure 1 As shown, it is a schematic diagram of the structure of a VFTO compound overvoltage withstand pulse interval ratio test device for insulating oil provided by this application, see figure 1 , the insulating oil VFTO composite overvoltage withstand pulse interval ratio test device in this embodiment includes: a control system 1, a pulse generation system 2 and a test system 3, wherein: the signal output terminal of the control system 1 is connected to the pulse generation system 2 are connected to the signal input end, and the signal output end of the pulse generation system 2 is connected to the test system 3 .
[0023] The control system 1 includes a master console 4, a pulse amplitude control channel 5 and a trigger control module 6, the signal input end of the pulse amplitude control channel 5 is connected to the master console 4, and the pulse ampl...
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The embodiment of the application discloses a test device and method for pulse withstanding interval ratio of insulating oil under VFTO composite overvoltage. A pulse generating system is electricallyconnected to a control system and a test system respectively, the pulse generating system comprises a pulse generating unit, the signal output end of the pulse generating unit is electrically connected to the first ends of a lightning pulse transmission cable and a VFTO pulse transmission cable respectively, the second end of the lightning pulse transmission cable and the second end of the VFTO pulse transmission cable are connected to the first end of a high voltage electrode in the test system; the second end of the high voltage electrode is immersed in insulating oil; a sampling port of adielectric strength tester is connected to a sampling port valve. The control system controls the pulse generating system to generate a lightning pulse and a VFTO pulse which act on the insulating oilin the test system, sample and test the insulating oil under the combined action of the lightning pulse and the VFTO pulse by dielectric strength tester to obtain the pulse withstanding interval ratio under a composite overvoltage, and determine the insulation strength of the insulating oil.
Description
technical field [0001] The present application relates to the technical field of insulation performance testing of insulating oil, in particular to a test device and method for VFTO compound overvoltage withstand pulse interval ratio test of insulating oil. Background technique [0002] In the power system, insulating oil is widely used as an insulating medium in high-voltage electrical equipment due to its low viscosity and pour point, high dielectric strength and flash point, and good anti-emulsification performance. Large oil-immersed transformers, oil-filled cables, oil switches and oil-filled transformers, etc. At present, except for the transformer, other conventional power equipment is integrated in the gas insulated switchgear (GIS, Gas Insulated Switchgear), and the action of the isolating switch or circuit breaker inside the GIS will generate a very fast transient overvoltage (VFTO, Very Fast Transient Overvoltage), the amplitude of VFTO is smaller than lightning ...
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IPC IPC(8): G01R31/12
CPCG01R31/1281
Inventor 谭向宇周利军王科彭晶赵现平马仪周年荣张文斌黄星程志万马国明
Owner YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST