DC mutual inductor check meter combining analog quantity and digital quantity verification function

Abstract

A DC mutual inductor check meter combining analog quantity and digital quantity verification functions comprises a main control module, an analog input sampling module, a digital quantity input parse module, a clock synchronization module, a man-machine exchange module, and a power supply module powering corresponding modules; the check meter also comprises following device interfaces: a clock synchronization interface, at least two analog input interfaces, and at least one digital quantity input optical network port; the analog input interfaces are connected with the analog input sampling module; the digital quantity input optical network port is connected with the digital quantity input parse module; the clock synchronization module is connected with the clock synchronization interface and the main control module; the main control module further processes the data sent by the analog input sampling module and the digital quantity input parse module, and processed data is sent to and displayed by the man-machine exchange module. The check meter can check the DC mutual inductors of either analog output type or digital quantity output type.

Description

technical field [0001] The invention relates to a DC transformer calibrating device, which belongs to the measurement field of high-voltage direct current transmission systems, and can calibrate the DC transformer whose output is an analog quantity or a digital quantity. Background technique [0002] In the power system, high-voltage direct current transmission is mainly used for long-distance high-power transmission, submarine cable power transmission and communication between asynchronously operating AC systems, etc. The DC transformer is an important measurement device in the DC transmission system, which provides the required measurement signal for the control and protection of the system. The measurement accuracy and operation stability of the DC transformer have an important impact on the monitoring, protection and stable operation of the DC transmission system. The pre-installation calibration test and periodic calibration of DC transformers are indispensable to ensu...

AI Technical Summary

Problems solved by technology

There are two types of DC transformers to be tested: analog output type and digital output type. Standard DC transformers are generally analog output types. The existing DC transformer calibrator is used to connect with the DC transformer to be tested The interface generally only has digital input interface or analog input interface, which cannot take into account the calibration function of analog output type and digital output type DC transformer

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