A general design optimization method for UHF partial discharge sensor

Abstract

The invention relates to a universal designing, optimization and test method of an ultra-high frequency local discharging sensor. The method comprises steps of 1) determining a designing bandwidth ofthe sensor; 2) determining a sensor structure form capable of achieving the bandwidth; 3) carrying out simulation comparison analysis on processing material parameters of the sensor; 4) designing an impedance converter and determining parameters of the impedance converter; 5) determining the final value of all related parameters of the sensor so as to obtain a sensor whole model; 6) carrying out simulation verification on the sensor whole model; 7) selecting an emphasis parameter of a sensor physical model and using an apparatus to carry out parameter test; 8) using a discharging model to carry out performance test on the sensor physical model; 9) carrying out final test on the sensor physical model; and 10) by combining the simulation and test results in the above steps, summarizing optimized improving experience, thereby finishing the final sensor. According to the invention, the method is quite proper and universal, and problems in actual application are solved.

Description

technical field [0001] The invention relates to the field of partial discharge detection, in particular to a general design optimization method for UHF partial discharge sensors. Background technique [0002] The safe and reliable operation of power equipment is the fundamental guarantee for the stability of the entire power system. However, due to various factors such as manufacturing, transportation, on-site assembly, operation and maintenance, there are inevitably some insulation defects that threaten insulation performance in power transmission and transformation equipment such as transformers, circuit breakers, switch cabinets, and power cables. Insulation defects that lead to insulation failures in power equipment often produce partial discharges in the early stages. Partial discharge in power equipment is an electrical discharge phenomenon in the insulating medium, which is mainly caused by weak parts with local defects in the insulation of the equipment. A very une...

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Problems solved by technology

[0006] Based on the above analysis, the design and optimization of the UHF sensor is the key to the reasonable use of the UHF method for partial discharge detection, and the actual engineering application puts forward higher requirements for the UHF method. There are obvious deficiencies in the design and optimization of the system, and a more scientific, reasonable and general optimization design method is needed to standardize and solve problems in practical applications.

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