Electrical Power-transmission Grids: Future of High-voltage Power Line Carrier
Merkulov A.G.
November 2022CIGRE
CIGRE Science and Engineering
2022#2022Issue 26
This work focuses on the traditional type of telecommunications for electrical power-transmission grids. This corresponds to the high voltage (HV) power line carrier (PLC) communication along phase conductors of high, extra-high and ultrahigh voltage electrical power-transmission lines (PTLs) of 35–765 kV. Twenty to twenty-ve years ago, HV PLCs were used for most power transmission electrical lines in the electrical grid for the transmission of voice, telecontrol data and teleprotection signals. Despite the modernization of electrical equipment over the past 15–20 years, a large number of HV PLC channels (from a few hundred to tens of thousands) are still in operation, particularly in countries spread over a large area and possessing developed electrical grids. The telecommunication networks of power-transmission companies are commonly based on the implementation of several technologies. The trends in the development of networks of power-transmission companies are currently oriented toward OPGW or wireless communications. Hence, the HV PLC technique has reached a milestone where the next stage of its lifecycle should be de ned. This work analyses place of HV PLC technologies in the modern electric power industry in the next decades and aims to establish a strategy for future HV PLC application depending on the directions of telecommunication network development in power transmission companies. This paper presents a time diagram showing the stages of introducing a new hardware and technology into PLC equipment and HV PLC technique, problems faced when extending existing HV PLC networks, such as spectrum overload and transition to packet switched IP networks, and the use of edge technologies such as discrete multi-tone modulation and the application of wideband digital power line carrier with packet switching to overcome these problems. As well, it discusses new areas of HV PLC technology application for long-term condition monitoring (CM) of power lines. Several strategies to facilitate and/or revive the application of HV PLC systems in the electrical grids of power-transmission companies are presented. Based on the provided information, we can say that in the next decades, HV PLC, most likely, will not yield their positions in the industry. But HV PLC technologies can nd their niche in the electric power industry of the future, even in the event of complete rejection of HV PLC channels for voice, data, and as technology for teleprotection and condition monitoring of HV electrical power lines.
Condition Monitoring , Frequency Resource , High Voltage , Modem , Power Line Carrier
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Siemens, Kazakhstan
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