Anti-interference shielding method for ultrasonic detection of combined electrical appliance
A combination of electrical appliances and ultrasonic technology, applied in shielding devices, using acoustic measurement for testing, testing dielectric strength, etc., can solve problems such as misjudgment, missed judgment, impact on detection results, and difficulty in detection and judgment, so as to avoid interference and improve The effect of accuracy
Inactive Publication Date: 2017-11-14
ELECTRIC POWER SCI & RES INST OF STATE GRID TIANJIN ELECTRIC POWER CO +2
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Problems solved by technology
[0002] At present, the ultrasonic partial discharge detection of combined electrical equipment has become one of the main detection methods to judge whether there are defects in the combined electrical equipment. However, when the ultrasonic live detection is performed on the combined electrical equipment, it is easy to be affected by noise such as corona in the substation and transformer fans. Interference makes it difficult to detect and judge, and it is easy to cause misjudgment and missed judgment, which affects the detection effect
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[0015] Embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings.
[0016] An anti-interference shielding method for ultrasonic detection of combined electrical appliances, comprising the following steps:
[0017] Step 1. Fix the ultrasonic sensor 2 on the combined electrical appliance body 5 and connect it with the ultrasonic detection instrument 4 through the signal line 3, and perform ultrasonic partial discharge detection on the combined electrical appliance, such as figure 1 shown.
[0018] Step 2. When the detected data is found to be abnormal by the ultrasonic detection instrument, keep the ultrasonic sensor on the body of the combined electrical device and install a special noise shielding cover 1 outside the ultrasonic probe.
[0019] In this step, the special noise shielding cover is a specially designed curved noise shielding cover for the present invention, such as figure 2 As shown, the size of ...
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Abstract
The invention relates to an anti-interference shielding method for the ultrasonic detection of a combined electrical appliance. The method is characterized in that an ultrasonic sensor is fixed to the combined electrical appliance and is connected to an ultrasonic detection instrument through a signal line, the ultrasonic local discharge detection of the combined electrical appliance is carried out; when the abnormality of detection data is found, a special noise shielding cover is installed outside an ultrasonic probe; then the ultrasonic local discharge detection of the combined electrical appliance is carried out again, if the ultrasonic data detected in the two times have no obvious difference, a signal received by the ultrasonic sensor can be viewed to be from the combined electrical appliance body; and if an ultrasonic value is obviously reduced after installing the special noise shielding cover, the signal detected by the ultrasonic sensor can be viewed to be from the outside of a space. According to the method, the interference of external noise can be effectively avoided, the accurate positioning and quality determination of an equipment internal defect are helped, the accuracy of live detection local discharge positioning is effectively improved, and a feasible guidance is provided for equipment maintenance.
Description
technical field [0001] The invention belongs to the technical field of combined electrical appliances, in particular to an anti-interference shielding method for ultrasonic detection of combined electrical appliances. Background technique [0002] At present, the ultrasonic partial discharge detection of combined electrical equipment has become one of the main detection methods to judge whether there are defects in the combined electrical equipment. However, when the ultrasonic live detection is performed on the combined electrical equipment, it is easy to be affected by noise such as corona in the substation and transformer fans. Interference makes detection and judgment difficult, and it is easy to cause misjudgment and missed judgment, which affects the detection effect. Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencies of the prior art, and propose an anti-interference shielding method for ultrasonic detection of co...
Claims
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Login to View More IPC IPC(8): G01R31/12G01R1/18
CPCG01R31/1209G01R1/18
Inventor 李松原张弛满玉岩王永宁刘创华李苏雅李维博赵聪
Owner ELECTRIC POWER SCI & RES INST OF STATE GRID TIANJIN ELECTRIC POWER CO