Power line carrier communication self-adaptive impedance matching method

A power line carrier and impedance matching technology, applied in distribution line transmission systems, electrical components, wired transmission systems, etc., can solve problems such as poor real-time performance, reliability problems, and limited power line environment change capabilities, to improve communication capabilities. Effect

Pending Publication Date: 2021-03-16
QINGDAO TOPSCOMM COMM
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The current power line impedance matching method usually uses the typical impedance value on the line for matching. The real-time matching is poor, and the ability to deal with changes in the power line environment is limited, and it is easy to affect the communication effect when the environmental impedance changes.
[0005] There is also a method of automatic impedance ma...

Method used

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  • Power line carrier communication self-adaptive impedance matching method
  • Power line carrier communication self-adaptive impedance matching method
  • Power line carrier communication self-adaptive impedance matching method

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Embodiment Construction

[0024] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0025] Such as figure 1 As shown, the power line carrier communication system implementing the method adopts an adaptive impedance matching method, including a power line, a coupler, a coupler matching impedance, an impedance, a transformer, an impedance acquisition module, a data processing module, an impedance matching part and a signal output module, wherein , The coupler is usually a high-voltage capacitive coupler to feed back the signal to the power line for transmission; the transformer realizes resistance conversion, converting the impedance of the power line end into the impedance of the c...

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Abstract

The invention relates to a power line impedance matching technology, and discloses a matching method based on power line impedance acquisition and matching control, which detects a power line impedance value in real time when a signal is sent, and dynamically matches line impedance to enable the sending quality of the signal to be optimal. The output control signal is divided into a plurality of gears by adopting a threshold matching rule according to the signal output by the calculation control part, control is performed according to the gears, frequent adjustment of a matching module is avoided, and long-term operation reliability is ensured. The method comprises the steps of acquiring power line impedance through a power line impedance acquisition module; and obtaining the control quantity through operation processing of collected data to control the matching module to select proper matching impedance, so that the signal output power is increased to the maximum extent, and then thecommunication capability is improved.

Description

technical field [0001] The invention relates to medium-voltage power line carrier technology, in particular to an adaptive impedance matching method for power line carrier communication. Background technique [0002] In recent years, with the development of power systems, power line carrier channels have been widely used in information transmission such as power distribution automation and power consumption information collection, making power line carrier channels increasingly important, which puts forward higher requirements for the reliability of power line carrier channels. However, because the PLC system uses the power line as the communication channel, and the power line network is complex, coupled with the influence of channel attenuation, noise interference, and electromagnetic compatibility, the impedance of the power line changes randomly with time, which affects the communication quality. [0003] The impedance of the power line fluctuates on the line, generally t...

Claims

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Application Information

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IPC IPC(8): H04B3/54H04B3/56
CPCH04B3/542H04B3/56
Inventor 徐剑英李亮闫庆鑫殷宁宁郭相泉滕伟涛张广磊
Owner QINGDAO TOPSCOMM COMM
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