DC quick break switch checking device and checking method thereof

Abstract

The invention discloses a DC quick break switch checking device, which comprises a power supply device, a startup switch, a standard clock signal source, a controller circuit, a current detection module and a DC quick break switch connection interface, wherein the standard clock signal source provides standard clock signals; the current detection module detects current signals of the DC quick break switch and uploads the current signals to the controller circuit; and the controller circuit checks the performance of the DC quick break switch. The invention also discloses a checking method for the DC quick break switch checking device. The method comprises steps: parameters are initialized and set; the DC quick break switch is connected; checking is started; current data and time data are recorded; and checking and display are carried out. Through sampling current signals passing through the DC quick break switch and corresponding clock signals, the DC quick break switch can be checked,and the performance and action logic relationship among multiple DC quick break switches can be checked at the same time.

Description

technical field [0001] The invention specifically relates to a calibrating device and calibrating method for a direct current quick opening switch. Background technique [0002] With the development of national economy and technology and the improvement of people's living standards, electric energy has become an indispensable secondary energy source in people's production and life, bringing endless convenience to people's production and life. [0003] DC quick disconnect switch is widely used in the 220V DC system of the substation, and undertakes the important task of DC system protection. Due to the large power supply content and wide distribution of circuits in the DC system of substations, there are often many branches in a DC network that need to be protected by low-voltage circuit breakers (quick opening switches), and are often divided into three to four stages in series. How to correctly select the quick release switch and the coordination of selective protection be...

AI Technical Summary

Problems solved by technology

In recent years, the requirements for the safety and reliability of power supply have gradually increased, and the number of fast-opening switches used in DC systems has gradually increased. If the upper and lower level differentials are not properly selected and coordinated, once a fault occurs, it may cause a DC power supply leapfrog tripping event, resulting in substation DC system failure. The scope of the accident expanded

[0004] However, at present, when substation maintenance personnel check and accept the DC quick-opening switch, they often only conduct empirical inspection and judgment on the basic characteristics of the DC quick-opening switch. Verify the time-current characteristics of the DC quick-opening switch and the matching characteristics of the level difference between the upper and lower DC quick-opening switches

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