Low-voltage transformer area physical topology online generating and real-time monitoring method and system

Abstract

The invention relates to the technical field of low-voltage distribution network line detection, in particular to a low-voltage transformer area physical topology online generating and real-time monitoring method. The method includes the steps that signal generating units, signal detecting units and a data transmitting unit are reasonably deployed on a transformer area line, and the data transmitting unit communicates with an electricity power monitoring platform; after a topology online generating instruction is sent, all branch line physical topologies are generated one by one and are combined into an integral low-voltage transformer area physical topology to be stored; the generated physical topology is compared with that stored before, and if the generated physical topology is different from that stored before, the change position is marked. The invention further provides a low-voltage transformer area physical topology online generating and real-time monitoring system. The signal generating units are arranged on equipment at the tail end and the middle of the transformer area line, the signal detecting units are arranged on equipment in the middle and the head end of the transformer area line, and the data transmitting unit is arranged at the low-voltage side of a distribution transformer. The transformer area line physical topology can be generated on line and monitored in real time, topology changes of the line are found in time, and reliable operation of an electric system is ensured.

Description

technical field [0001] The invention relates to the technical field of detection of low-voltage distribution network lines, in particular to a method and system for on-line generation and real-time monitoring of the physical topology of a low-voltage station area. Background technique [0002] In recent years, with the rapid development of the power grid, the hardware facilities in the distribution transformer area have been greatly improved. The marketization of the power system has put forward more refined management requirements for the power management department. The need to reduce consumption and loss is more urgent. It has become an important indicator to reduce the line loss rate of the station area and make the line loss rate of the station area meet the national standard. In line loss management, it is the most difficult to manage by station area and phase, mainly reflected in: [0003] 1. The basic information of the station area is incomplete; for some old stat...

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Problems solved by technology

[0003] 1. The basic information of the station area is incomplete; for some old station areas, due to the long period of time, the original saved data was lost, or the basic information was not updated in time after the later line reconstruction, resulting in a mismatch between the data and the actual line

[0004] 2. Users privately connect power lines, especially at the junction of the station area, which is more likely to cause crossover, which aggravates the confusion of the line in the station area

[0008] The simple use of power carrier communication has two obvious disadvantages: in the case of adjacent substations sharing high voltage, common ground, and common cable trench, it is easy to cause misjudgment due to the cross-connection of carrier signals; the power carrier signal is a high-frequency signal, attenuation Seriously, users with long distances and large line interference cannot be identified; although the method of combining pulse characteristic current signals and power carrier signals improves the reliability of identification, the operation is complicated and the workload is heavy

During the on-site test, the staff need to manually test the relationship between the measured point and the distribution transformer in the station area. For the distribution transformer station area with complex lines, when determining the branch relationship of the line, the workload of the on-site personnel is heavy, it takes a lot of time, and it cannot be automatically generated. The line connection relationship needs to be sorted out manually

This offline test method also cannot realize real-time monitoring of the topology of the station area

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