Magnitude tracing method for low-output current sensor

Abstract

The invention discloses a magnitude tracing method for a low-output current sensor. The method comprises the following steps of: cascading a standard current sensor and a current comparator; connecting the primary side of the low-output current sensor and the primary side of the standard current sensor in series; and connecting the secondary side of the low-output current sensor and the secondaryside of the current comparator in series. According to the magnitude tracing method for the low-output current sensor, the method can effectively realize the magnitude tracing of the low-output current sensor.

Description

technical field [0001] The invention relates to the technical field of electrical measurement, in particular to a method for tracing the source of a weak output current sensor. Background technique [0002] At present, the current sensors used for the primary and secondary fusion of the distribution network mostly use traditional current sensors, and their secondary outputs are generally 5A and 1A, and the secondary outputs of the current transformers in the corresponding value traceability system are also 5A and 1A. These two gears. However, with the development of the power grid, the primary and secondary fusion technology of the distribution network requires that the sensors originally responsible for power monitoring have a wider frequency domain, better transient characteristics, and can be integrated into other equipment (such as switchgear, post insulators, etc.) Therefore, the current sensors used for primary and secondary fusion are still mainly electromagnetic cur...

AI Technical Summary

Problems solved by technology

However, with the development of the power grid, the primary and secondary fusion technology of the distribution network requires that the sensors originally responsible for power monitoring have a wider frequency domain, better transient characteristics, and can be integrated into other equipment (such as switchgear, post insulators, etc.) Therefore, the current sensors used for primary and secondary fusion are still mainly electromagnetic current sensors, but at the same time, the secondary output value of the current sensor needs to be reduced according to actual needs to make it a weak output. For example, the current sensor’s The secondary rated output is weak output such as 0.1A and 0.5A, so that it is better suitable for primary and secondary fusion equipment

However, the secondary signal in the current traceability system of the current sensor is only 1A and 5A, resulting in weak output current sensors that cannot be traced back to the existing traceability system

Therefore, the existing traceability system cannot effectively realize the traceability of the value of the weak output current sensor

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