Method and system for on-line generation and real-time monitoring of physical topology in low-voltage station area

Abstract

The invention relates to the technical field of detection of low-voltage distribution network lines, in particular to a method for online generation and real-time monitoring of the physical topology of a low-voltage station area. A signal generation unit, a signal detection unit, and a data transmission unit are reasonably deployed on the line in the station area. The data transmission unit and Power supervision platform communication; after sending the topology online generation command, generate the physical topology of each branch line one by one, and merge it into the physical topology of the entire low-voltage station area and save it; compare the generated physical topology with the previously stored one, if different, mark the change position The present invention also provides a low-voltage station area physical topology online generation and real-time monitoring system, a signal generating unit is set at the end of the line in the station area and at the intermediate equipment, a signal detection unit is set at the middle of the line in the station area and at the head-end equipment, and at the distribution The low-voltage side of the electric transformer is equipped with a data transmission unit; the invention can generate the physical topology of the line in the station area online and monitor it in real time, discover changes in the line topology in time, and ensure the reliable operation of the power system.

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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