A high-speed power line carrier communication system signal distribution device
A technology of power line carrier and carrier signal, applied in the direction of distribution line transmission system, etc., can solve the problems of poor anti-interference ability, unfavorable popularization and application, high cost, etc., and achieve the effect of ensuring stability, ensuring frequency characteristics and reducing system cost
Active Publication Date: 2017-04-05
YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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Problems solved by technology
In this way, the whole set of equipment must have two carrier signal couplers to work, the cost is very high, it is not conducive to popularization and application, and the anti-interference ability is poor
Method used
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[0027] Specifically, the carrier signal first passes through a 1-40MHz LC bandpass filter 63 composed of an LC filter network inductor 631 and an LC filter network capacitor 632 connected in series at the input end to filter out signals other than 1-40MHz, and then passes through the impedance The matching autotransformer 64 transmits the carrier signal to the distribution autotransformer 65 , and divides the carrier signal into two paths to the first output terminal 61 and the second output terminal 62 .
[0028] LC bandpass filter 63 design indexes are as follows in the present embodiment:
[0029] 1) Center frequency: 20MHz;
[0030] 2) -2dB bandwidth: ≥40MHz;
[0031] 3) Insertion loss: ≤2dB;
[0032] 4) Stop band suppression 1: f0±5MHz, suppression ≥ 40dB;
[0033] 5) Stop band suppression 2: when f=24MHz, suppression ≥ 50dB;
[0034] 6) Working temperature: -55℃~85℃;
[0035] 7) Impedance: 50Ω.
[0036] The impedance matching autotransformer 64 is an impedance tran...
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The invention provides a signal distributor of a high-speed power line carrier communication system. The signal distributor comprises a carrier signal coupler, a first carrier signal modem, a second carrier signal modem, a first communication terminal and a second communication terminal, wherein the first carrier signal modem is connected with the first communication terminal, and the second carrier signal modem is connected with the second communication terminal. The signal distributor further comprises a signal distribution unit, wherein the input end of the signal distribution unit is connected with the carrier signal coupler; the signal distribution unit comprises a first output end and a second output end, the first output end is connected with the first carrier signal modem, and the second output end is connected with the second carrier signal modem. The signal distributor of the high-speed power line carrier communication system has the advantages of being low in cost and high in anti-jamming capability.
Description
technical field [0001] The invention provides a high-speed power line carrier communication device, and in particular relates to a high-speed power line carrier communication system signal distribution device with low cost and strong anti-interference ability. Background technique [0002] Power Line Carrier Communication (PowerLine Carrier-PLC) is a special communication method that uses power transmission lines as the information transmission medium for voice or data transmission. According to the power line voltage level for carrier signal transmission as an information transmission medium, it can be divided into: high voltage power line carrier communication (35kV and above voltage level), medium voltage power line carrier communication (10kV voltage level), low voltage power line carrier communication (380 / 220V low voltage distribution Wire); according to the signal modulation method, it can be divided into OFDM, FSK, PSK, ASK, etc., and according to the transmission ra...
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IPC IPC(8): H04B3/56
Inventor 李波林聪曹敏胡万层刘清蝉雷正明
Owner YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST