Topology identification system and method based on distribution transform terminal

Abstract

The invention discloses a line monitoring unit based on cooperation of a transformer area distribution transform terminal (TTU), a branch box and a meter box. A fusion terminal controls the line monitoring unit to inject short-time active current sequence signals with obvious characteristics through broadband carrier HPLC by a communication command; the sequence signal detection result of the line monitoring unit of each node on the line is read; the sequence signal detection result of the line monitoring unit (LTU) is read by a software APP running in a container of the distribution transform terminal; and an automatic topology identification file is generated in the distribution transform terminal according to the detection result, so as to realize automatic topology identification check.

Description

technical field [0001] The invention belongs to the technical field of power distribution and transformation, and in particular relates to a line topology identification technology. 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, and the demand for reducing 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 the line loss management, the topology identification of the station area is the most critical. Without the topology, it is impossible to calculate the line loss of the branch and segment, and it is impossible to calculate the line loss of the newly added line. [...

AI Technical Summary

Problems solved by technology

[0009] Method 1 can only identify the line-phase sequence relationship of the topology, but cannot identify the relationship between each level, and cannot realize multi-level automatic topology identification; the high-frequency current signal injected by the method 2 is easily interfered by the high-frequency signal of the electrical equipment in the station area. As a result, the recognition rate depends on the actual situation of the station area, and the usability is low, and the injected high-frequency current signal may cause the leakage protection to malfunction and affect the safe operation of the equipment; the third method is difficult to solve. The clock of each node of the compared signal Synchronization is difficult to achieve the millisecond level required for accurate identification, resulting in inconsistent characteristic signals in the time domain, and is limited by the actual operating conditions of different power consumption points. If the characteristic signal of the power consumption point comparison is too small, it will Causes identification errors or is difficult to identify; Method 4 adopts the method of inputting capacitors and injecting reactive current signals, which may generate 4 to 10 times inrush current, resulting in misoperation of switch relay protection or failure of user electrical appliances, resulting in a decrease in power supply reliability and security incidents

[0010] The space for research and promotion of the above four methods is limited, and the application effect needs to be further improved

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