High-voltage switch cabinet box wall integrated electromagnetic ultrasonic composite sensor and installation method
A composite sensor, electromagnetic ultrasonic technology, applied in the parts, instruments, measuring electricity and other directions of electrical measuring instruments, can solve the problems such as the detection personnel doubt the results obtained by the detection, the complex processing of the sensor, the limitation of online monitoring, and the use of live detection, etc. Achieve the effect of avoiding serious short-circuit faults, expanding the scope of use, and facilitating processing
Pending Publication Date: 2020-12-11
SHANGHAI MUNICIPAL ELECTRIC POWER CO +2
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Problems solved by technology
[0004] The above-mentioned ultrasonic and transient ground-to-ground voltage detection, because they are external, are susceptible to external electromagnetic interference, which makes the inspectors often doubt the results obtained by the detection, and cannot judge whether the ultrasonic signal and electromagnetic signal come from the inside of the high-voltage switchgear or the interference source. , thus missing the internal discharge signal and causing severe short-circuit faults due to insulation breakdown
However, for the above-mentioned existing UHF technology, the processing of sensors is relatively complicated, which is not convenient for popularization and use by equipment manufacturers, and certain special conditions are required for installation, which greatly limits the application of this UHF detection method in the insulation defect PD of high-voltage switchgear equipment. On-line monitoring, live detection use
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[0044] The present embodiment provides a high voltage switchboard boxes composite wall integral electromagnetic ultrasonic sensor, such as figure 1 , The complementary coupling UHF electromagnetic signal comprising the composition of the insulating cover 4, a first metal patches 2, the second metal patch 3, the insulating plate 1, a first coaxial connector 6 and high voltage switchboard boxes wall 5 dipole dual patch antenna; two transient voltage to ground the metal patches 17, two insulating sheet 16, an inductor 18, a second coaxial cable connector 21, a first metal cover 20 and the tank wall 5 of high voltage switchgear capacitive division of formula transient electromagnetic wave signal may be coupled to ground voltage probe composition; the PZT sensor 25, the second metal cap 24, the third coaxial cable connector 23 and the high voltage switchgear tank wall 5 consisting of ultrasound may be coupled ultrasonic signal probe; one implementation, thereby forming an insulation de...
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Abstract
The invention relates to a high-voltage switch cabinet box wall integrated electromagnetic ultrasonic composite sensor and an installation method. The sensor comprises a complementary dipole double-patch antenna, a transient voltage-to-ground probe and an ultrasonic probe; the complementary dipole double-patch antenna comprises an insulating cover, an insulating plate and a metal patch assembly; the transient voltage-to-ground probe comprises two insulating sheets and two transient voltage-to-ground metal patches; the ultrasonic probe comprises a PZT sensor connected with the outer wall of a switch cabinet wall. Compared with the prior art, the sensor is simple in design and convenient to process, realizes synchronous and joint measurement of ultrahigh frequency and transient voltage to ground of ultrasonic wave signals and electromagnetic wave signals generated by insulation defect discharge of components in a high-voltage switch cabinet, realizes detection / inspection, and can providesignals for an online monitoring device or an intensive care system.
Description
Technical field [0001] The present invention relates to the field of detecting a partial discharge of high voltage switchgear, particularly to a high voltage switchgear box wall integral electromagnetic ultrasonic sensor and a complex installation method. Background technique [0002] High Voltage Switchgear is a direct distribution network equipment for power users, and its failure will cause the user power outages leading to huge economic losses to the grid, and cause some social impact; moreover, currently required under the policy to create a favorable business environment, ensuring operation and maintenance of high quality and reliable power supply is the only way to protect the power grid. Because of the complex internal structure of the high voltage switchgear, small insulation spacing, which results in more power than an insulation defect prone other electrical equipment, the insulating surface of the device occurs under conditions of moisture condensation creepage like p...
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IPC IPC(8): G01R31/12G01R1/04
CPCG01R1/0416G01R31/1209G01R31/1227
Inventor 司文荣傅晨钊纪坤华宋平李卫彬肖金星苏卫华张琪祁陆启宇魏本刚高凯袁鹏
Owner SHANGHAI MUNICIPAL ELECTRIC POWER CO