Automatic identification system and method for line topology of low-voltage transformer area

Abstract

The invention relates to an automatic identification system and method for the line topology of a low-voltage transformer area, belonging to the technical field of transformer area line topology identification. The automatic identification system includes a carrier signal generation device, a terminal identification module embedded into an intelligent electric meter, a geographic information system, a main processing station, and the like. The precise positioning and graphical display functions of the geographic information system are utilized to make the automatic identification of line topology more vivid. At the same time, two methods of identifying the phase line where a user is located are proposed according to the different transmission modes of carrier signals. The traveling wave theory is used to judge the power supply distance from a transformer to each user, and whether the voltage is too low due to the long power supply line can be judged. The system can automatically and accurately identify the line topology of a transformer area with less data, distinguish the phase line where each user is located and calculate the power supply distance from a transformer to each user,can be used to judge whether the terminal voltage is too low due to the large power supply distance, and is easy to popularize and apply.

Description

technical field [0001] The invention belongs to the technical field of line topology identification in station areas, and in particular relates to a system and method for automatic identification of line topology in low-voltage station areas. Background technique [0002] At present, there are several methods commonly used in the line topology drawing technology in the station area as follows: (1) Rely on the line topology data left over from the construction period of the distribution network, and manually update the drawing. This method cannot realize automatic line topology recognition. When the line changes, it needs to be modified manually, and a lot of manpower needs to be wasted for on-site survey and then drawing. (2) Collect, analyze, and process various data such as electricity consumption information, power marketing application business, geographic information, park energy efficiency management, and building energy management systems to obtain the line network to...

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Problems solved by technology

Although the system structure of this method is simple, its function is single, and it is greatly affected by the load of the distribution station area. At the same time, the sampling module of the identification terminal obtains the voltage and current signals of the user end, and transmits them to the master station for analysis and processing, and cannot calculate the power of the line. length, it is impossible to judge whet

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