Secondary phase detecting instrument and method

Abstract

The invention discloses a secondary phase detecting instrument and method. The secondary phase detecting instrument comprises a low-voltage PT (Potential Transformer) module set, an A / D module, a master control MCU (Microprogrammed Control Unit) module, a human-computer interaction module and a power module; when in use, six lines of which the voltages are to be checked are connected to corresponding interfaces, the phase is started to be checked after powering until successfully checking the phase, any artificial interference is not needed during phase checking, and therefore, the phase checking operation is simple; in addition, the phase checking can be accurately carried out by acquiring the voltage within 20m under a cycle, so that time for waiting in the whole phase checking process is short, and as a result, the phase checking efficiency is greatly raised; finally the intelligent detection of a three-phase electrical phase sequence at any voltage grade can be performed under the existing artificial phase checking hardware condition, and therefore, the applicable scope is wide.

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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