A Fault Diagnosis System for Low-Voltage Station Area

Abstract

The present invention provides a low-voltage transformer area fault diagnosis system. Data control subsystems are arranged in various low-voltage transformer areas of a power distribution network; monitoring and diagnosis are carried out on parameters of the low-voltage transformer areas, such as three-phase voltage, three-phase current, frequency, power, oil temperature and switching quantity; when the monitored parameters exceed threshold values, an alarm is given; the time information of a Beidou clock source is obtained, so that the time of components within system time can be set in a unified manner; the data information of monitoring points in the monitored areas is organically integrated through the forms of lines, formulas, instruments, tables, graphs and numerical values; the integrated data information is outputted in a visualized manner, so that a data development trend chart can be formed; key parameters can be prominently projected onto a display platform; and when the data information in the monitoring points exceeds a threshold value, alarm filtering, alarm forwarding, alarm display, alarm query and alarm statistics related processing are carried out, and then, alarm information is stored timely and correctly.

Description

technical field [0001] The invention relates to the field of power supply, in particular to a low-voltage platform fault diagnosis system. Background technique [0002] The distribution network is at the end of the power system, and has the distinctive characteristics of wide geographical distribution, large-scale power grid, various types of equipment, various network connections, and variable operation modes. With the urbanization construction and the growth of electricity demand, the distribution network has been continuously transformed and expanded, and its scale has also been continuously expanded. The scale of most county-level and above distribution networks in the State Grid Corporation system has reached hundreds of feeders. Above, the number of medium voltage feeders in some medium and large cities has reached or exceeded one thousand. [0003] In this way, driven by the development of the national economy, there has been a phenomenon of power cuts; the compositi...

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Problems solved by technology

[0003] In this way, driven by the development of the national economy, there has been a phenomenon of power cuts; the composition of the load has changed, and the residential and commercial power consumption has increased significantly, which has increased the load on some lines and transformers, and even caused partial power outages due to overload; Due to the expansion of local faults caused by the defects of the power system itself, large-scale and long-term power outages occur; because the reactive power supply configuration and adjustment methods do not adapt to the load development, the grid voltage level cannot meet the power quality requirements, resulting in damage to electrical equipment and even occurrence of power failures. Power outage accidents caused by voltage collapse; there are problems with excessive network loss during the operation of the distribution network, etc.

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