High-speed power waveform recording and analyzing instrument

Abstract

The invention discloses a high-speed power waveform recording and analyzing instrument, which is mainly formed by a main control module, a voltage acquisition module, a current acquisition module and a switching value monitoring and acquisition circuit. Eight current standard input channels, eight voltage standard input channels and sixteen switching value signal channels are provided. Four groups of extended channels are configured corresponding to sixteen analog channels to adapt to different combinations of input modes. A USB interface is connected with a background computer. The high-speed power waveform recording and analyzing instrument works under the control of a data acquisition, control and analysis program, can acquire voltages, current waveforms and switching value states of the grids with the same voltage class or different voltage classes, and can automatically upload the excessive voltages, current waveforms and switching value states to the background computer. The high-speed power waveform recording and analyzing instrument can be widely used to record and analyze the overvoltage and overcurrent waveforms of power systems, and is suitable for the rapid transient overvoltage detection of devices such as combined electrical apparatuses, large transformers and the like, and the experiments on the impacts of power devices such as fling-cut switches, capacitors and the like on the power systems.

Description

technical field [0001] The invention relates to a high-speed power waveform record analyzer for electric power measurement, in particular to a high-speed power waveform record analyzer for collecting power waveforms at high speed and recording and analyzing them, and is also suitable for rapid monitoring of equipment such as combined electrical appliances (GIS) and large transformers. Transient overvoltage, overcurrent detection, and experiments on the influence of power equipment such as switching switches and capacitors on the power system. Background technique [0002] In the power system, there are a large number of inductive and capacitive devices. When the operating state of the grid changes, the energy is redistributed and exchanged in the system, thus forming various internal overvoltages; at the same time, due to lightning directly hitting or inducting On the line or equipment, and intrude into the power system to generate atmospheric overvoltage. The existence of ...

AI Technical Summary

Problems solved by technology

Although these two devices have realized the monitoring of the internal overvoltage and external overvoltage of the power system, there are still the following limitations: 1. The function is single, and it can only monitor the overvoltage signal, and cannot monitor the overcurrent waveform and the state of the switching value. As a result, it is impossible to achieve comprehensive analysis and evaluation of the power system; 2. The trigger method is single, and only when the signal exceeds the set value will the trigger start to collect data, which cannot be applied to the situation where the signal changes suddenly but does not exceed the set value; 3. The acquisition card Due to the limitation of sampling rate and sampling depth, it is impossible to collect short time, fast changing, high frequency signals and long time, slow changing signals

Images