Optical mutual inductor calibration and operation monitoring method and system

Abstract

The invention provides an optical mutual inductor calibration and operation monitoring method and a system so as to solve the problem that measurement is inconvenient. The system comprises a computer, a calibration module, an on-line operation monitoring module, a current generation module, a combination unit, a computed tomography (CT) electrical unit, a fiber optical current transformer (FOCT) optical cable, a gas insulated switchgear (GIS), an equal ampere-turn cable and an equal ampere-turn optical fiber sensitive ring. The current generation module generates current signals. The equal ampere-turn cable amplifies the current signals penetrating through the equal ampere-turn sensitive ring. The calibration module collects the current signals inside the equal ampere-turn cable as the standard signals, receives detected current received by the CT electrical unit at the same time after framing of the combination unit, and transmits the detected current in a packaging mode to the on-line operation monitoring module. The on-line operation monitoring module processes received data, obtains ratio error value and angular difference value of a calibrated optical mutual inductor, and sends the ratio error value and the angular difference value to the computer. The method and the system monitor performance index of the optical mutual inductor on the condition that power is not off in real time, and are safe, high in calibration precision, fast in speed, and high in efficiency.

Description

Technical field [0001] The invention relates to a device measurement technology, more specifically to a transformer calibration and monitoring technology. Background technique [0002] Smart grid is one of the national strategic emerging industries. Transformers are important equipment for electric energy measurement and relay protection in the power system. Its long-term stability, reliability, and safety are closely related to the safe and stable operation of the power system. Traditional electromagnetic induction transformers are based on the principle of electromagnetic induction and have been applied for more than one hundred years. However, they have shortcomings such as flammability and explosion, and cannot meet the needs of the development of new power systems. [0003] Compared with traditional electromagnetic transformers, electronic voltage transformers have the advantages of high precision, high linearity, wide frequency band, small size and light weight. Electronic v...

AI Technical Summary

Problems solved by technology

The current optical transformer calibration technology requires on-site power off and on in the substation, which brings great inconvenience to the measurement.

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