Title :
Research on power frequency data transmission via electric power distribution network
Author :
Jun, Ma ; You, Men Jin ; Gang, Pan Zeng ; Dong, Feng Qing
Author_Institution :
Harbin Inst. of Technol., China
Abstract :
The power-line carrier (PLC) signal belongs to an intermediate frequency range. Deep signal attenuation and standing waves limit data transmission of the PLC only on the secondary side of the distribution transformer. power frequency data transmission (PFDT) adopts the method of voltage zero-crossing modulation. The signal frequency is under 600 Hz. Signal transmission characteristics can be analyzed with the theory of symmetrical components. The notch filter can eliminate the influence of the 50 Hz fundamental wave with its harmonic waves. After that, correlation detection effectively restrains the electrical noise. Field applications indicate the PFDT signal has the capability to transmit via a distribution transformer for 40 kilometers.
Keywords :
carrier transmission on power lines; correlation methods; modulation; notch filters; power transformers; signal detection; 40 km; 50 Hz; 600 Hz; PFDT; correlation detection; distribution power network; distribution transformers; electric power distribution network; intermediate frequency power-line carrier signal; notch filter; power frequency data transmission; signal attenuation; standing waves; symmetrical components theory; voltage zero-crossing modulation; Amplitude modulation; Attenuation; Data communication; Digital modulation; Downlink; Frequency modulation; Power harmonic filters; Power system management; Programmable control; Voltage;
Conference_Titel :
Universities Power Engineering Conference, 2004. UPEC 2004. 39th International
Conference_Location :
Bristol, UK
Print_ISBN :
1-86043-365-0
