Insulation online monitoring method for high-voltage capacitive equipment

Abstract

The invention discloses an insulation online monitoring method for high-voltage capacitive equipment, which is used for solving the insulation online monitoring problem of the high-voltage capacitive equipment in a transformer substation. Safe and reliable measurement of voltage and current of the capacitive equipment of the transformer substation is realized by combining a fiber transmission technology, a photoelectric conversion technology, a digital signal processing technology and a virtual instrument technology through an optically powered data link (OPDL); synchronous acquisition of voltage and current signals is realized by optical pulse synchronous trigger; weak electrical signals are converted into optical signals in situ and the optical signals are transmitted through fibers, so that the interference resistance of the signals is improved, and meanwhile, the problem of possible overvoltage when the traditional cable transmits the signals is avoided; and by adopting a laser power supply technology, energy supply problems of outdoor electronic components such as zero flux current sensors and the like are safely and effectively solved, and reality and accuracy of the acquired signals are ensured. The method can provide reliable data for state maintenance and full-life management of power equipment, has reliable operation, and is convenient in operation and safe to implement.

Description

technical field [0001] The invention belongs to the technical field of condition maintenance of electrical equipment, and in particular relates to a method for on-line monitoring the insulation performance of high-voltage capacitive equipment in substations. Background technique [0002] Electrical equipment is the basic component of the power system and the basis for ensuring the reliability of power supply. The safe operation of electrical equipment is the prerequisite for the safe, stable and economical operation of the power system. During the operation of power equipment, its insulating medium is subjected to various factors such as heat, electricity, chemistry, and machinery. The insulation of the equipment will inevitably deteriorate. cause power grid accidents. [0003] In order to ensure the safe and reliable operation of the equipment, it is necessary to detect the insulation status of the equipment, grasp the operation of the equipment, and prevent problems befor...

AI Technical Summary

Problems solved by technology

[0005] 1. The ability of the sensor to resist environmental temperature, humidity changes and electromagnetic interference is relatively poor, which can easily lead to signal distortion, resulting in inaccurate medium measurement, poor stability, and large measurement errors

[0006] 2. Due to the strong electromagnetic interference around the equipment when it is running, the communication of the traditional monitoring system uses electric transmission, which has poor anti-interference ability, easy distortion of the signal, and easy misjudgment; and the electrical cables connecting the on-site monitoring equipment and the monitoring room are very It is easy to become a safety hazard in connecting the strong current side and the weak current side

[0007] 3. The structural design of the insulation on-line monitoring system is unreasonable, the on-site installation workload is heavy, and maintenance is difficult

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