A gas-insulated real-time self-calibrating broadband high-voltage measuring device

Abstract

The invention relates to a gas-insulating real-time self-calibration broadband high voltage measuring device and belongs to the technical field of optical voltage measuring devices. The gas-insulatingreal-time self-calibration broadband high voltage measuring device is characterized in that a high voltage electrode and an insulating sealing plate are respectively fixed at two ends of a hollow insulator to complete the sealing of the hollow insulator; a circle of cylinder shielding layer is arranged along the inner wall of the hollow insulator; a reference voltage electrode is fixed at the bottom of the insulating sealing plate, an insulating sleeve is arranged below the reference voltage electrode, and a grounding electrode is connected to the lower end of the insulating sleeve; an integrated optical electric field sensor is fixed at the central axis inside the insulating sleeve, the integrated optical electric field sensor is connected with an SLD light source and an optical signal receiver through polarization maintaining optical fibers, and the output end of the optical signal receiver is connected with a signal processing unit. By the gas-insulating real-time self-calibrationbroadband high voltage measuring device, the influence of temperature and an external electric field on the measuring precision of the voltage measuring device is eliminated.

Description

technical field [0001] The invention relates to a gas-insulated real-time self-calibrating broadband high-voltage measuring device, which belongs to the technical field of optical voltage measuring devices. Background technique [0002] With the increase of the capacity of my country's power system, the increase of operating voltage level and the increase of transmission distance, the monitoring, control and protection of the whole system must meet higher requirements. Traditional electromagnetic voltage transformers have been difficult to meet the needs of power system development due to problems such as high insulation difficulty, small dynamic range, ferromagnetic resonance, and narrow frequency band. [0003] With the continuous development of electronic technology and optoelectronic technology, optical voltage transformers gradually show great potential to replace traditional voltage transformers. The optical voltage transformer mainly uses the Pockels effect to calcul...

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Problems solved by technology

Chinese invention patent 201610998948.X discloses a nano-material dielectric shielding electronic optical voltage transformer, which cannot eliminate the influence of temperature on measurement accuracy

Chinese invention patent 201510426486.X discloses an optical voltage transformer based on SF6 coaxial capacitor voltage division, using internal SF6 coaxial capacitors as high-voltage side voltage-dividing capacitors, and high-performance NPO capacitors as low-voltage side voltage-dividing capacitors. Essentially based on the principle of capacitive voltage divider, and cannot eliminate the influence of temperature on measurement accuracy

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