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Power Line Carrier

The power system communication network is an integral part of the power system, encompassing all stages of power generation, transmission, transformation, distribution, consumption, and dispatching. It serves as a crucial infrastructure and backbone for ensuring the safe and stable operation of the power system. After extensive development, China has now established a communication network pattern in the power system, primarily relying on optical fiber communication, with microwave communication, power line carrier communication, and other methods coexisting.

Power line carrier communication is a unique communication method in the power system, utilizing power lines as the medium for information transmission. It involves modulating high-frequency carrier signals onto the power lines for the transmission of voice or data. A key advantage of this method is that it doesn't require additional wiring, leveraging existing power lines for data transmission. Consequently, it has widespread applications within the power system.

Furthermore, with the advancement of Internet of Things technology, power line carrier communication has found applications in smart streetlights, smart homes, smart buildings, and industrial control systems. However, its most significant application area remains in the field of smart grid power consumption information collection.

In the fourth quarter of 2022, the State Grid Corporation of China officially ceased bidding for High-Performance Liquid Chromatography (HPLC) communication modules and initiated bidding for dual-mode communication modules. The demand for the replacement of smart meters in this round of upgrades is anticipated to gradually unfold over the next 5-8 years. Furthermore, State Grid is constructing a ubiquitous power Internet of Things, which necessitates enhanced performance standards for smart meters to accommodate services such as new energy integration, energy efficiency management, home security, and energy storage management. Concurrently, State Grid is accelerating the implementation of 'full coverage, full collection, and full cost control,' actively promoting the adoption of new services like two-way interaction and 'four-meter collection,' which involves the integrated management of water meters, electricity meters, gas meters, and heat meters. The electricity information collection system is also undergoing a transition to an advanced measurement system that supports two-way communication and real-time pricing models. The upgrading of smart meters will further stimulate market demand for these devices.