Electrical topology identification system and method of low-voltage court for fast fault location

Abstract

The invention relates to an electrical topology identification system and method of a low-voltage court for fast fault location. At present, according to the existing court identification principle, amode of voltage zero-crossing signal modulation in a short-time short-circuit state of a phase line and a midline is employed; however, a risk of long-time short circuit between the phase line and the midline is caused and thus equipment burning or court fault power failure is caused. The system is composed of a collection and a distribution unit. The collection unit arranged at low-voltage sideoutlet of a distribution transformer is used for detecting a feature signal of a bus to carry out court identification determination and analyzing logic relationships of all nodes to form an electrical topological logic relationship automatically. The distribution unit connected with the collection unit wirelessly is arranged at a branch point or a meter box side. Therefore, the electrical topological logic relationship of the court can be depicted while no power failure is caused; a user under each transformer is checked clearly and thus a user-transformer relationship is identified automatically; the basic data in a distribution court can be reflected truly; and thus the foundation is laid for realizing intelligent management of the grid.

Description

technical field [0001] The invention relates to an electrical topology identification system and method, in particular to an electrical topology identification system and method for fast fault location in a low-voltage station area. Background technique [0002] At present, the transformers in the low-voltage station area have the following problems. 1) The wiring of users in the old station area is complicated, and the information is incomplete or not updated; 2) The new station area is adjacent to each other. Recently, it is the same group of high-voltage busbars, and it is impossible to correctly determine the ownership of the user's meter station area; 3) The electrical topology structure data of the low-voltage station area is even more incomplete, and the update is not timely. When a fault occurs, it cannot be quickly located. [0003] Therefore, there is a need for a device and method that can describe the electrical topology logic relationship of the station area wit...

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Problems solved by technology

[0004] The automatic generation of the electrical topological relationship of the station area is currently not applied to realize the identification of the station area. At present, the principle of station area identification often uses a short-circuit short circuit between the phase line and the neutral line to perform voltage zero-crossing signal modulation. This scheme has a long phase line and a neutral line. Risk of time short circuit, causing equipment to burn out or cause power failure in the station area

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