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Low-voltage powerline carrier communication experiment method and its experiment system

A low-voltage power line and carrier communication technology, which is applied in distribution line transmission systems, line transmission monitoring/testing, line transmission components, etc., can solve the problems of lack of promotional significance of test conclusions, affecting product performance evaluation, and large-scale promotion and application. , to achieve the effect of realizing online sensitivity test and high degree of standardization

Active Publication Date: 2009-04-08
NANJING XINLIAN ELECTRONICS
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Problems solved by technology

The test methods and test conclusions lack promotional significance, thus affecting the performance evaluation and large-scale promotion and application of this type of product

Method used

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  • Low-voltage powerline carrier communication experiment method and its experiment system
  • Low-voltage powerline carrier communication experiment method and its experiment system
  • Low-voltage powerline carrier communication experiment method and its experiment system

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specific Embodiment approach

[0017] Control attached figure 1 , its structure is that the carrier signal output end of the carrier transmitting device in the test system is connected with the signal input end of the program-controlled attenuation device; the signal output end of the program-controlled attenuation device is connected with the signal input end of the carrier receiving device under test; After the receiving device receives and decodes the correct carrier signal, it sends the carrier signal through the signal output terminal of the carrier receiving device under test for reply communication; the carrier level sent by the carrier sending device and the carrier level terminal sent by the carrier receiving device under test After coupling and sampling through the artificial power network, connect to the receiver of the spectrum analyzer for measurement; the computer reads the carrier level test data through the interface of the spectrum analyzer; the input end of the carrier receiving device unde...

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Abstract

The invention relates to a low-voltage electric wire carrier communication test method and a testing system thereof. The testing method comprises the following testing methods: I, a carrier transmitting PWL online testing method; II, a carrier receiving sensitivity online testing method; III, a carrier communication anti-interference online testing method; IV, a low-voltage circuit impedance change online testing method. The testing system comprises a carrier transmitting device, a program control attenuating device, a tested carrier receiving device, a manual power network, a frequency spectrograph receiver, a computer, a frequency spectrograph, a noise simulator, an impedance simulator and a purifying power. The invention has the advantages of adopting a manual power network parameter model regulated in GB / T 6113 F2, thus having a high standardization degree and comparable testing data; avoiding the testing problems brought by adopting different carrier communication schemes; realizing the online sensitivity testing; carrying out the test at any time and being not affected by the external environment factors like the weather; besides, the invention can simulate the impedance change environment of a real circuit, thus leading the analyzing of the carrier communication on the impedance change of the circuit to be feasible.

Description

technical field [0001] The invention relates to a low-voltage power line carrier communication test system, which is a test method for detecting the low-voltage carrier communication capability of carrier electric energy meters and other carrier communication products by simulating the on-site line environment. The invention belongs to the technical field of low-voltage power line carrier communication test. Background technique [0002] Low-voltage power line carrier communication refers to the technology of loading analog or digital signals onto low-voltage transmission lines by means of carrier waves for signal transmission. Because the signal attenuation characteristics and interference characteristics on low-voltage transmission lines are very complex, and they are random and time-varying, it is difficult to find an accurate analytical formula or mathematical model to describe and analyze them. Therefore, no effective method has been found for testing the performance o...

Claims

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Application Information

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IPC IPC(8): H04B3/54H04B3/46
Inventor 陆建友颜庭乔
Owner NANJING XINLIAN ELECTRONICS
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