Power Line Carrier Network Research Articles

Improvement of the Destructive Interference Method in the Mitigation of PLC Radiation of Imbalanced Impedance Electrical Networks

Communication technology by power line carrier (PLC) marks its return with the advent of energy-mix. Although appreciated by power-grid operators and customers, this technology suffers from the emission of parasitic electromagnetic radiation. Suspected of causing heath problem, the future of this technology is linked to the level of its radiation reduction. This radiation, which is mainly due to the common mode current, can be attenuated by many ways such as the destructive interference method. The destructive interference method is a dynamic mitigation method mainly used on indoor PLC network. The mitigation of PLC radiation by this method gives reduction rates of more than 24 dB on a balanced impedance electrical network. Unfortunately, the effectiveness of this method decreases sharply depending on the level of network instability (impedance imbalance). This work focuses on improving the effectiveness of the destructive interference method on certain points of the network (point of weak mitigation or amplification of radiation) in an unstable environment. This improvement of the method is centered on the adaptation of the mitigation parameters (phase and amplitude) via a sequential mode of action. The positive impact of the improved method, although focused on a specific area, extended throughout the network. For a network with imbalanced impedance, the average rate of mitigation with this new method exceeds 11 dB.

Blockchain-based 3D Self-positioning of Power Line Carrier Network Nodes

Blockchain-based 3D Self-positioning of Power Line Carrier Network Nodes

Decoupling networks for promoting power line carrier systems

Electricity authorities are constantly confronted by congestion in frequencies on their power line carrier (PLC) networks and they quite often look for alternative modes of communication which could be quite expensive. At a time when there is rapid growth in power systems, the need for exclusive communication circuits becomes significant. Therefore, the issues connected with power line carrier networks become more complex, particularly when the frequency approvals from the Government are not easily obtainable. Network decouplers have emerged as a dependable and economical solution. With the practices of selecting marginally-sized outdoor equipment and wide preference of onsite tuning, decouplers have been tried in some installations earlier. The gains sought thereby seem to be quite limited and often confined to teleprotection. The Indian experience with network decouplers, however, has proved to favour PLC systems not only for the teleprotection requirements but also for speech communication, monitoring measures and supervisory controls. Extensive short-circuit tests and modern dielectric technology have enabled manufacturers and utilities in realising these aims quite economically.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">&gt;</ETX>

Co-ordination of a power-line carrier network

RECENT EXPANSION in generating capacity of the Hydro-Electric Power Commission of Ontario, together with the policy of centralized control, has necessitated a power-line carrier channel mileage of approximately 16,000 operating over 2,600 circuit miles of the power network. Complexities in operating conditions and requirements, and a limited frequency spectrum, 50–200 kc, require quantitative measurements and consideration of the more important transmission factors in the co-ordination of a power-line carrier network.