Equipment voltage sag immunity testing method and device, computer equipment and medium

Abstract

The invention relates to an equipment voltage sag immunity testing method and device, computer equipment and a storage medium. Test conditions are set, and the method comprises the following steps: setting parameters, obtaining a tolerable voltage sag residual voltage threshold value and a tolerable residual voltage minimum value corresponding to the to-be-tested equipment by adopting a dichotomy; adjusting the test conditions, obtaining tolerable voltage sag residual voltage thresholds and tolerable residual voltage minimum values corresponding to the to-be-tested equipment under different test conditions, and finally obtaining a voltage sag immunity test result corresponding to the to-be-tested equipment. In the whole process, redundant test points are reduced through the dichotomy, the precision of a test result is ensured, and the equipment voltage sag immunity test can be efficiently and accurately realized.

Description

technical field [0001] The present application relates to the technical field of power grid, in particular to a method, device, computer equipment and storage medium for testing equipment voltage sag immunity. Background technique [0002] With the development of the power system, sensitive loads have been widely used in the power grid. Among many power quality problems, the problem of voltage sag is becoming more and more important, and has become the main power quality problem. Voltage sag refers to the phenomenon that the root mean square value of the power frequency voltage at a certain point in the power system suddenly drops to 0.1p.u~0.9p.u, and returns to normal after a short duration of 10 milliseconds to 1 minute. When a voltage sag occurs, it usually causes AC contactors, trip units, PLC (Programmable Logic Controller, programmable logic controller), relays, ASD (Automatic Synchronized Discriminator, automatic synchronization discriminator) and AC contactors to wo...

AI Technical Summary

Problems solved by technology

In the experimental test method, due to the great difference in the voltage sag immunity of the equipment under different working conditions, the voltage sag characteristics (such as the voltage sag start angle, phase jump, harmonic distortion rate, continuous voltage sag and voltage Recovery rate, etc.) have corresponding differences in the voltage sag immunity of the equipment. The test process cannot take all these voltage sag characteristics into account, resulting in large errors in the results obtained by the final test method.

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