Secondary nuclear phase instrument and nuclear phase method

Abstract

The invention discloses a secondary nuclear phase instrument and a nuclear phase method, wherein the secondary nuclear phase instrument comprises: a low-voltage PT module group, an A / D module, a main control MCU module, a human-computer interaction module and a power supply module. When in use, you only need to connect the 6 lines of voltage to be checked to the corresponding interface, and the phase check will automatically start after power transmission until the phase check is successful, without manual interference in the middle, so the operation of the check phase is simple; in addition, because only one The voltage within a period of 20ms can be correctly phase-nucleated, so the waiting time for the entire phase-nucleation process is very short, which greatly improves the efficiency of the phase-nucleation; finally, under the hardware conditions of the existing manual phase-nucleation, any voltage level can be realized The intelligent detection of the three-phase electrical phase sequence has a wide range of applications.

Description

technical field [0001] The invention belongs to the judgment of three-phase electrical phase sequence, in particular to a secondary nuclear phase instrument and a nuclear phase method. Background technique [0002] Secondary nuclear phase is a regular operation of power system maintenance personnel. After the transformer or voltage transformer is installed or overhauled, after the transformer or voltage transformer changes internal and external wiring or wiring groups, after the power line or cable wiring changes or changes in direction, the secondary circuit related to loop closure or parallel connection In the case of any modification during maintenance, etc., it is necessary to carry out phase determination of the three-phase circuit, that is, a phase verification test, to ensure that the three-phase phase sequence of the power supply provided by different power points is consistent. The phase nuclear test is to verify whether the phase sequence of the two power systems ...

AI Technical Summary

Problems solved by technology

[0005] The phase verification process needs to issue a work ticket, take safety measures, and need to cooperate with the operator to operate, so the waiting time is very long, which greatly reduces the work efficiency of the relay shift; if a phase error occurs, wait for the second phase adjustment after the phase adjustment. , the waiting time is longer, and the operator’s experience is relatively high; in the process of manual phasing, various factors lead to the possibility of errors. Once the secondary phasing is wrong, it will cause major damage to the equipment and the power grid. loss and impact

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