DSP-based high-voltage capacitive equipment insulation performance online monitoring device

Abstract

The invention relates to a DSP-based high-voltage capacitive equipment insulation performance online monitoring device, which comprises a signal acquisition module, a signal conditioning module, a signal sampling module, a signal processing module, a data communication and transmission module and a man-machine interaction module. The signal acquisition module acquires ground current and bus voltage signals of capacitive equipment and transmits the ground current and bus voltage signals to the signal conditioning module. After signal amplification, filtering, following isolation and other preprocessing, the signals enter the signal sampling module. Sampled digital signals are subjected to fast Fourier transformation by the signal processing module, and the signals are then sent to the man-machine interaction module and a background central control room host through the data communication and transmission module. The field display of data and a change curve is achieved through the man-machine interaction module. The background central control room host can achieve the functions of data storage, data management, alarm triggering and the like. The problem of low precision caused by hardware measurement is avoided, and timely and accurate acquisition of the insulation information of a plurality of pieces of equipment is realized. The device is easy to popularize and apply.

Description

technical field [0001] The invention belongs to the technical field of on-line monitoring equipment, and relates to a DSP-based on-line monitoring device for the insulation performance of high-voltage capacitive equipment. An online monitoring device for equipment insulation performance that performs fast Fourier transform on-line to obtain equipment dielectric loss angle, dielectric loss value, leakage current, and resistive current value in real time. Background technique [0002] Electric energy is the most important energy source for human production and life and social development. With the development and progress of society, human demand for electric energy is increasing day by day, and at the same time, the reliability requirements for electric power systems are also getting higher and higher. [0003] High-voltage capacitive equipment is an essential power transmission and transformation equipment in a substation, accounting for 40%-50% of the total equipment in a s...

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Problems solved by technology

[0010] The technical problems to be solved by the present invention are: to overcome the problem of poor timeliness caused by the regular and off-line equipment insulation detection method of the current substation; The problem of low accuracy of the experimental detection method can overcome the problem of power outage required for equipment insulation detection, and the problem of planned cost investment including a large amount of labor costs and time costs caused by the experimental method of testing equipment insulation, and provide a high-voltage based on DSP. On-line monitoring device for insulation performance of capacitive equipment. This device integrates sensor technology, signal processing technology, data communication technology and other technologies. It not only effectively avoids the problem of low precision caused by hardware measurement, but also realizes the insulation information of multiple devices. Timely, simultaneous and accurate acquisition, easy to promote and apply

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