The CMM series power line carrier communication module is a power line carrier product developed by New Cape with independent intellectual property rights. Based on years of practical experience, the company has absorbed the advantages of mature theories at home and abroad, combined with the characteristics of the domestic power grid, and proposed independent innovative communication models and algorithms. Its carrier mechanism is unique in China. The product adopts half duplex narrowband communication method, unique and efficient modulation and coupling technology, and intelligent adaptive channel anti-interference technology. It can solve the problems caused by the complexity of the power grid carrier communication channel model, large interference, and strong parameter time-varying to the greatest extent, making data transmission stable, reliable, and fast. It is a high-performance carrier communication product specially developed to adapt to the domestic power grid environment and has been widely used.

The CMM type carrier module meets the latest national standard requirements. For example, if it meets the Q/GDW standard of State Grid Corporation of China, it can be used as a universal module to cooperate with the collection terminal. As long as it meets the technical specifications of State Grid Corporation of China, the concentrator is plug and play and convenient for users to use. The carrier module can also be used for collectors that comply with State Grid standards, carrier cabinet meters, etc., providing a comprehensive solution for power line carrier communication.

Functional Features

1. Completely independently developed software/hardware

2. Extremely strong point-to-point transmission capability

3. Adaptive anti-interference technology

4. Easy installation and deployment process

Comparison with other commonly used carrier scheme technologies

At present, mainstream power line carriers generally use technologies such as spread spectrum communication and channel routing. Spread spectrum communication is a relatively mature technology that combines multi frequency point transmission and has a high received signal-to-noise ratio. When used for power line communication, a transformer is required to achieve signal coupling, and coupled with the high carrier frequency, the attenuation is large and the transmission distance is short. The introduction of routing technology can gradually expand the transmission distance, but the time-varying and complex nature of the power grid carrier communication channel model will increase the difficulty of manual routing configuration during construction and commissioning, and also have high requirements for automatic routing algorithms.

Our company uses narrowband phase modulation communication method, with a center frequency as low as 12KHz, strong anti attenuation ability (low-frequency can be transmitted further), and good point-to-point communication ability, which is conducive to forming a robust communication network; Adaptive channel anti-interference technology is adopted during reception, dynamically adjusting the receiving sensitivity based on environmental noise to achieve excellent reception effect and improve communication success rate; The zero configuration automatic networking method does not require configuration of routing parameters, slave node addresses, etc. It can work directly after power on, and each carrier node completes the networking on its own, with high channel transparency and easy installation, construction, and debugging. The above characteristics can solve the problems caused by the complex channel model, large interference, strong time-varying parameters, difficult signal coupling, and fast attenuation of power grid carrier communication to the greatest extent, making data transmission stable, reliable, and fast.

Compared with other mainstream carrier schemes, in typical environments, the point-to-point transmission distance of this scheme can be 2-3 times longer, and the system installation and debugging time can be shortened to 1/3-1/6.

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