Self-adaptive electric power carrier wave concentrator

Abstract

The concentrator includes microprocessor, electric power carrier communication unit (EPCCU) connected to microprocessor, external memory unit, infrared communication interface, power line coupling interface (PLCI) connected to EPCCU, and power amplifier circuit connected between EPCCU and PLCI. Characters are that being composed of dedicated frequency extended carrier wave chip, EPCCU is in use for communicating with each meter-reading terminal (MRT) in CDMA frequency extended mode; being composed of amplifying circuit in sine wave, power amplifier circuit is in use for carrying out sine wave amplification for signal output from EPCCU; the concentrator also includes an error correction coding unit; a polling unit in use for executing polling step, and establishing routing list communicated with each MRT. The invention raises stability of communication under condition without raising transmission power so as to be in favor of reducing harmonic wave pollution of power line.

Description

technical field [0001] The invention relates to an adaptive power carrier concentrator for automatic meter reading. Background technique [0002] The application of power line carrier technology to realize automatic meter reading in the power industry can greatly improve the efficiency of meter reading work in the power supply department and reduce the intensity of meter reading work for staff. Now, automatic meter reading technology has become the trend of electric power intelligent management, and it is an indispensable part of electric power marketing information system. Seeking simple, reliable and cost-effective meter reading technology is an important research content in the field of meter communication. [0003] In the underlying communication of automatic meter reading technology, the most concerned is still through the power line carrier. Fig. 1 shows a structural block diagram of an existing concentrator module. As shown in FIG. 1 , the basic components of the u...

AI Technical Summary

Problems solved by technology

From the perspective of users, communication products must adapt to all possible harsh working environments, and the communication system must ensure normal network communication. Usually, the method of amplifying the transmission power of the carrier wave is used to improve the communication quality, but the harmonic content is too high, which will pollute the power grid. ; Or take measures to increase the gain, but it is often impossible to completely solve the communication quality problem

Quoting a paragraph in the general rules of IEC611334, to solve the problems of large signal transmission attenuation, high noise level, and unpredictable changes in coupling impedance on the communication channel of distribution lines, it is necessary to focus on the communication capability of the physical layer. Less than

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