Method for precisely and synchronously measuring multiple high and low-potential electric parameters and device

Abstract

The invention relates to a method for precisely and synchronously measuring multiple high and low-potential electric parameters and a device. The device comprises a high potential acquisition and measurement module and a low potential acquisition and measurement module. The high potential acquisition and measurement module is connected with the low potential acquisition and measurement module by an optical fiber. The method includes physically isolating high potential and low potential by the aid of photoelectric transmission technology; obtaining electric parameter data; acquiring data by the aid of the high potential acquisition and measurement module and the low potential acquisition and measurement module; leading the high potential acquisition and measurement module to acquire and record the data; transmitting the waveform data of multiple high-potential electric parameters into the low potential acquisition and measurement module via the optical fiber; recording and storing the waveform data by the low potential acquisition and measurement module; and correcting fixed delay values of the optical fiber, an internal circuit of the high potential acquisition and measurement module and an internal circuit of the low potential acquisition and measurement module to precisely and synchronously measure the waveform data of the multiple high and low-potential electric parameters. The method is novel in conception and is simple, convenient and feasible, the device is reasonable in structure, and the requirement on high precision of high and low-potential electric synchronous measurement can be met.

Description

technical field [0001] The invention relates to high-voltage measurement technology, in particular to a method and device for high-voltage and low-potential multi-electrical parameter high-precision synchronous measurement. Background technique [0002] In the study of the physical mechanism of high-voltage discharge tests, it is usually necessary to compare and analyze the variation laws of characteristic parameters such as voltage, current, and electric field under different high and low potential states. A device for synchronously measuring multiple electrical parameters. However, as far as the applicant knows, it is difficult for existing measuring devices to realize the task of measuring multiple electrical parameters simultaneously with high precision while ensuring reliable insulation. [0003] As we all know, the traditional high-potential voltage measurement device mainly uses a voltage divider or a current transformer to measure the secondary side voltage or curre...

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Problems solved by technology

The applicant found that the device has obvious deficiencies in the research: first, it can only measure the voltage signal at the high potential end, but cannot measure the current and electric field signals at the high potential end; Accurate synchronous measurement problem, so it cannot realize the work of high-precision synchronous measurement of multiple electrical signals at different potential terminals

This method is proposed in view of the current sensor's complex insulation from the ground, the huge material consumption, the poor consistency of the passive photoelectric current transformer, the complicated adjustment, and the limited dynamic range of the Rogowski air-core coil. After compensation, there are still deficiencies.

The applicant believes that although the "A Device and Method for Measuring High-Voltage Current" (Patent No.: CN200810117062.5) disclosed in the Chinese patent literature has certain feasibility, it also has certain shortcomings: it does not consider measuring multiple currents at the same time. electrical parameters, and did not consider the problem of synchronous measurement of multiple electrical signal parameters at different potential terminals, so it is also impossible to achieve the task of high-precision synchronous measurement of electrical signal parameters at different potential terminals.

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