LoRa (Long Range wireless network) communication technology based distribution network fault indicating system

Abstract

The invention discloses a LoRa (Long Range wireless network) communication technology based distribution network fault indicating system, which comprises a monitoring master station, a collection unit and a plurality of acquisition units, and is characterized in that the plurality of acquisition units are installed at acquisition points of a distribution network line at intervals and used for acquiring voltage and current data on the acquisition points, the collection unit is in wireless communication connection with the plurality of acquisition units through a LoRa and used for receiving the voltage and current data on the plurality of acquisition units; and the collection unit is in wireless communication connection with the monitoring master station through a GPRS (General Packet Radio Service) and used for sending the voltage and current data of different acquisition points to the monitoring master station and receiving command signals of the monitoring master station. The LoRa communication technology based distribution network fault indicating system has the advantages of simple structure, high fault indicating accuracy, reliable operation and the like.

Description

technical field [0001] The invention mainly relates to the field of distribution network technology, in particular to a distribution network fault indication system based on LoRa communication technology. Background technique [0002] In the construction of distribution network automation, overhead fault indicators are more and more favored by power grid companies because they do not require modification of primary equipment and can be installed live, especially in suburban and rural distribution networks where loads are relatively dispersed. [0003] Such as figure 1 As shown, the overhead fault indicator is mainly used for line fault monitoring and indication in the distribution network field; the functional module of the general fault indicator includes two parts: three acquisition units and one collection unit, of which the three acquisition units As the acquisition terminal of A, B, C three-phase load current and phase electric field, the acquisition unit sends the col...

AI Technical Summary

Problems solved by technology

From the above structure, it can be clearly seen that the network communication between the acquisition unit and the collection unit of the existing two-remote overhead fault indicator cannot well take into account the requirements of low energy consumption and long-distance transmission: the acquisition unit is directly connected to the overhead On the line, there is no reliable power supply, and it is generally powered by CT and its battery pack and method, which has high requirements for low power consumption; in addition, based on the existing communication mode and combination method, the fault indicator In the process of installing and selecting points, there is a contradiction between cost and indication accuracy: if the indication accuracy is improved, the installation density must be increased, and each group of acquisition units needs to be equipped with a converging unit, where the converging unit consists of MCU control board and GPRS module , lithium batteries, solar panels, stainless steel casings with high IP ratings, etc., account for 70%-80% of the cost of the entire device; Line workers spend a lot of time and energy patrolling between two installation points that are transitionally dispersed

Images