A power line broadband carrier concentrator

Abstract

The invention discloses a power line broadband carrier concentrator, which comprises a three-phase coupling transceiver circuit, an orthogonal frequency division multiplexing circuit, an analog front end, a broadband carrier processor, and a path selection module; the three-phase coupling transceiver circuit performs three-phase Carrier coupling and time-division transceiver, and transmission to the OFDM circuit; the OFDM circuit modulates the power signal to a carrier with a fixed frequency bandwidth, and the analog front-end filters and adaptively amplifies the signal , and transmitted to the broadband carrier processor; the broadband carrier processor is connected to the main station through the PLC signal interface; the path selection module is used to calculate the optimal path from the concentrator to several collectors, and perform dynamic routing according to the optimal path. The invention solves the long-standing problems of unstable power line carrier communication technology and large interference, and can greatly improve the transmission rate and timeliness of power terminal data by obtaining the best path from the concentrator to the collector.

Description

technical field [0001] The invention relates to the technical field of power line carrier communication, in particular to a power line broadband carrier concentrator. Background technique [0002] Power line communication (PowerLine Communication, PLC) is a communication technology for data transmission through wires. Power line carrier technology is plug and play, which greatly improves the efficiency of production, work and life, and saves the cost of wiring construction to a large extent. . At present, power line carrier technology increasingly dominates the communication methods of power systems and civilian life. According to different carrier frequencies, carrier rates, and carrier modulation methods, the industry is divided into two major power communication camps: narrowband and broadband. [0003] In recent years, with the advancement of the State Grid Corporation of China's smart grid construction, the power consumption information collection system is gradually ...

AI Technical Summary

Problems solved by technology

Most of the existing automatic meter reading systems for smart energy meters use narrowband power line carrier or Zigbee, 475MHz small wireless and other communication methods. Such communication methods have short distances, large transmission interference, slow meter reading speed, and unstable meter reading status. The problem is that the amount of data transmitted is limited, and the function is relatively single, and the reliability of the data and the real-time performance of data transmission using the electric terminal are greatly reduced.

[0004] However, with the development of centralized meter reading technology, the amount of data that the concentrator needs to collect is increasing. Using the existing technology to automatically read the meters in the entire system may take several hours, or even more than ten hours. It can be seen that the transmission capacity and single function of the existing narrowband power carrier technology cannot adapt to the increasingly mature and huge centralized meter reading system

Images