Step response test system and method of all-fiber direct current measuring device

Abstract

The invention discloses a step response testing system and method for an all-fiber direct current measuring device. The system includes a current source, an all-fiber direct current measuring device to be measured, a step response calibrator, and an all-fiber direct current measuring device to be measured. Including the fiber optic current sensing loop and the secondary converter, the current source and the fiber optic current sensing loop are connected to form a primary loop, and the fiber optic current sensing loop is also connected with a precision shunt and a secondary converter, and a precision shunt and a secondary converter. All the devices are connected with the step response calibrator, and the precision shunt is connected with the step response calibrator through a high-speed acquisition card. The invention also provides a step response testing method. The invention improves the test accuracy of the step response process of the all-fiber direct current measuring device, so that the test results can more accurately reflect the actual performance of the direct current measuring device, thereby effectively improving the ability to discriminate the performance of the direct current measuring device.

Description

technical field [0001] The invention relates to the technical field of flexible direct current transmission, in particular to a step response testing system and method of an all-fiber direct current measuring device. Background technique [0002] With the expansion of the grid construction scale year by year, especially the vigorous development of ultra-high voltage and ultra-high voltage direct current transmission projects, higher requirements are put forward for the direct current measurement device. The operation reliability and measurement accuracy of the direct current measurement device are directly related to the direct current transmission system. stable operation. Compared with the AC transmission system, the DC transmission system requires faster sampling speed and wider dynamic range for control and protection signals, which is particularly prominent in the flexible DC transmission system. When the DC side of the flexible DC transmission system fails, the loop i...

AI Technical Summary

Problems solved by technology

[0003] The existing testing standards for DC current measuring devices include GB / T 26216.1-2010, which was completed without the guidance of IEC standards. The description of the step response test method in the existing standards is not clear, and the existing step response calibration There is no unified calibration standard and calibration basis for the tester, and it is impossible to accurately test and identify the performance of the DC current measurement device, and cannot meet the actual needs of the flexible DC project

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