High-voltage energy acquisition device based on series connection of capacitors and constant current source

Abstract

A high-voltage energy acquisition device based on series connection of capacitors and a constant current source includes capacitors, insulating tubes, a three-phase connector and a high-voltage power-taking power source. First through holes of equal size are symmetrically arranged in the two sides of the three-phase connector. One ends of the insulating tubes are symmetrically arranged in the through holes in the two sides of the three-phase connector. The capacitors are coaxially arranged in the two insulating tubes. The high-voltage power-taking power source is arranged in the three-phase connector. Because a high-frequency switching transformer is adopted, the abnormality of the DC load will cause the magnetic saturation of the magnetic core, and the DC output voltage will change sharply at the moment. However, an automatic voltage stabilization circuit makes a special chip for power factor correction automatically interrupt the operation of a field effect transistor, so that the occurrence of ferroresonance is avoided.

Description

technical field [0001] The invention belongs to the field of high-voltage energy harvesting, in particular to a high-voltage energy harvesting device based on capacitor series constant current sources. Background technique [0002] The common high-voltage power-taking methods include current transformer power-taking and voltage transformer power-taking. The current transformer needs to connect the impedance in series on the secondary side of the transformer to obtain the voltage and power. The voltage on the impedance is proportional to the primary current, so the power supply based on the current transformer technology is not easy to achieve voltage stabilization. Voltage transformers mainly include electromagnetic voltage transformers and capacitive voltage transformers. Electromagnetic voltage transformers are bulky, inconvenient to install, and costly. In addition, the nonlinear impedance and inherent capacitance of the traditional capacitive voltage transformer sometim...

AI Technical Summary

Problems solved by technology

The current transformer needs to connect the impedance in series on the secondary side of the transformer to obtain the voltage and power. The voltage on the impedance is proportional to the primary current, so the power supply based on the current transformer technology is not easy to achieve voltage stabilization.

Voltage transformers mainly include electromagnetic voltage transformers and capacitive voltage transformers. Electromagnetic voltage transformers are bulky, inconvenient to install, and costly

In addition, the nonlinear impedance and inherent capacitance of the traditional capacitive voltage transformer sometimes cause ferromagnetic resonance in the capacitive voltage transformer, so it is necessary to use a damping device to suppress the resonance. In order to improve the load capacity and reduce the load on the relay, etc. Influenced by the measurement, a series compensation reactor is required at the input end of the medium-voltage transformer, which increases the complexity of the transformer

[0003] At present, the better capacitor voltage division method is to obtain power from the high-voltage bus through the overcapacitor voltage division, and store the electric energy in the supercapacitor. Many, so that the structure is complex, the volume increases, and it will also cause ferromagnetic resonance phenomenon during work.

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