A Fault Diagnosis System for Capacitive Voltage Transformer Damping Circuit

Abstract

The invention provides a damping loop fault diagnosis system of a capacitor voltage transformer. The damping loop fault diagnosis system comprises a diagnosis and analysis module used for evaluating the operation condition of a damping loop, a power module used for adjusting the input power of the damping loop, a data collecting module and a man-machine interaction module. The diagnosis and analysis module is connected with an outside AC power source. The input end of the power module is connected with the diagnosis and analysis module, and the output end of the power module is connected with an outside leading-out terminal including the damping loop. The data collecting module is used for collecting the parameter of the damping loop and then transmitting the parameter to the diagnosis and analysis module. The man-machine interaction module is connected with the diagnosis and analysis module and is used for achieving information exchange between people and the diagnosis and analysis module. The damping loop fault diagnosis system of the capacitor voltage transformer is convenient to operate, simple in platform setting-up, high in stability, capable of precisely measuring the effective values, the peak values and the corresponding wave curves of the currents and the voltages of the damping loop of detected equipment, and capable of scientifically and reasonably judging the state of the damping loop of the capacitor voltage transformer and guaranteeing safe and stable operation of the equipment.

Description

technical field [0001] The invention relates to the technical field of capacitive voltage transformers, in particular to a fault diagnosis system for a damping circuit of a capacitive voltage transformer. Background technique [0002] The capacitive voltage transformer is composed of a capacitive voltage divider and an electromagnetic unit. The damping circuit is part of the electromagnetic unit and can suppress continuous ferromagnetic resonance. In the daily preventive test project, the number of capacitive voltage transformers out of operation due to the failure of the damping circuit accounts for more than 60% of the total number of failures. Due to the inability to accurately carry out the state analysis of the damping circuit, the electromagnetic part of the capacitive voltage transformer frequently suffers from heat generation, abnormal secondary voltage, and even bursting of the low-voltage fuse, which is extremely unfavorable to the safety of the equipment and the s...

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Problems solved by technology

However, this detection method mainly relies on the experience of the staff to conduct tentative diagnosis. It is cumbersome to set up the test equipment, the stability is poor, and due to the waveform distortion factor, it cannot indicate the true effective value of the current.

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