An induction display type electronic voltage mutual induction system and a method for detecting voltage thereof

Abstract

The invention discloses an induction display type electronic voltage mutual induction system which comprises a display and one or more electronic voltage transformers. The electronic voltage transformer comprises a cylindrical insulating casting, one end face of the insulating casting is provided with a first interface, the other end face of the insulating casting is provided with a second interface, a first spherical electrode is disposed at the end inside the insulating casting to the first interface and electrically connected with one end of the first interface, and the other end of the first interface is electrically connected with a high-voltage busbar in a high voltage device. A second spherical electrode and a signal processor are respectively disposed in the end inside the insulating casting close to the second interface; one end of the signal processor is electrically connected to the second spherical electrode, and the other end of the signal processor is electrically connected to the display. According to the induction display type electronic voltage mutual induction system, the voltage of a high voltage charged body can be detected by utilizing the two spherical electrodes, the transmission link of an analog signal is omitted, the influence of various uncontrollable interference factors of the analog signal transmission process is completely eliminated, and the system stability and measurement accuracy are greatly improved.

Description

Technical field [0001] The invention relates to the field of sensors, in particular to an induction display type electronic voltage mutual inductance system. Background technique [0002] Traditional high-voltage metering generally uses electromagnetic induction high-voltage sensors for detection, and there are many disadvantages in high-voltage environments. Specifically: ⑴In order to meet the requirements of high-voltage insulation, the detection device is large, heavy, inconvenient to install and use, and the insulation structure is complex, which is prone to process defects, and there are hidden safety hazards. (2) Due to the resonance of the iron core of the electromagnetic coil, it is easy to cause a transformer explosion accident. ⑶ Due to the non-linearity of ferromagnetic materials, magnetic saturation benefits, magnetic flux leakage, etc., measurement errors are prone to occur, and even protection malfunctions. (4) The detected analog signal is easily interfered durin...

AI Technical Summary

Problems solved by technology

Specifically: (1) In order to meet the high-voltage insulation requirements, the detection device is large in size, heavy in weight, inconvenient to install and use, and the insulation structure is complex, prone to process defects, and there are potential safety hazards

(2) Due to the resonance of the iron core of the electromagnetic coil, it is easy to cause a burst accident of the transformer

(3) Due to the influence of ferromagnetic material nonlinearity, magnetic saturation effect, magnetic flux leakage, etc., it is easy to produce measurement errors and even cause protection malfunctions

⑷The detected analog signal is susceptible to interference during long-distance transmission, and the measurement system is composed of multiple stages, resulting in a decrease in measurement accuracy

Although this method is safer than the previous two methods, it is easily affected by factors such as air humidity and the installation distance between the sensor and the charged body, which makes the detected voltage error larger

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