Automatic identification method and system of low-voltage power distribution network topology based on based on power frequency carrier communication technology

Abstract

The invention discloses an automatic identification method and system of low-voltage power distribution network topology based on based on power frequency carrier communication technology. A concentrator and an automatic topology identification device are installed beside each transformer in a low-voltage distribution network court, the concentrator and the automatic topology identification device are connected by a 485 line, a dual-mode collector is internally or externally arranged on an intelligent electric meter of the low-voltage distribution network court, an intelligent power distribution network topology identification master station is installed in a power marketing center or a power operation and inspection department, then the intelligent power distribution network topology identification master station performs automatic identification via the above equipment, the automatic identification converts the newly established topology link relation table data into a geographical topology diagram and a logic topology diagram of the low-voltage power distribution network, updates the original geographical topology diagram and the original logic topology diagram of the court, and records a topology state change event. The automatic identification method and system disclosed by the invention are conducive to updating the data in real time and greatly improving the timeliness of operation and maintenance, and patrol and repair, and play an important role of improving the economic benefits of power enterprises.

Description

technical field [0001] The invention relates to the technical field of electric low-voltage distribution network, in particular to a method and system for automatic identification of low-voltage distribution network topology based on industrial frequency carrier communication technology. Background technique [0002] The distribution network of low-voltage station areas undertakes the key function of transporting domestic electricity at the end of the power network. The automatic recognition method of low-voltage power distribution system topology is used to calculate the connection relationship of various electrical equipment in parks, communities, and buildings, and connect these connections in a certain way. The relationship is stored, and the topology analysis is in a very important position in the loss calculation and energy saving analysis of the low-voltage power distribution system. If there is an error in the topological relationship of the household transformer of ...

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Problems solved by technology

If there is an error in the topological relationship of the household transformer of the low-voltage distribution network, it will have a serious impact on the accuracy of the line loss calculation in the station area, and even seriously, it will have an adverse impact on the economic operation of the power grid, which may lead to the topological relationship of the low-voltage distribution network There are two main reasons for the error: first, due to the error in the file of the user’s ammeter line during the construction of the low-voltage distribution network, the topological relationship of the low-voltage distribution network is wrong; When adjusting the wiring in the middle, the change of the ammeter file is not recorded or the record is wrong, resulting in an error in the topological relationship of the low-voltage distribution network

Traditional low-voltage distribution network topology identification and detection mainly rely on manual inspection methods, that is, according to the distribution and direction of the distribution network in low-voltage station areas, manual surveys are carried out section by section with hand-held household transformer identification instruments. Many, cable trenches or overhead lines are laid in parallel, the inspection is not only inefficient and costly, but also cannot obtain real-time and accurate topological information of household substations in low-voltage station areas

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