A New Measurement Method of Conducted EMI on the Power-Line Communications Channel

2013 ◽  
Vol 397-400 ◽  
pp. 1988-1993
Author(s):  
Wei Long Fu ◽  
Ya Lin Guan ◽  
Yang Lu
Keyword(s):  
Electromagnetic Interference ◽  
Measurement Method ◽  
Low Voltage ◽  
Power Line ◽  
Line System ◽  
Power Line Communications ◽  
Noise Characteristics ◽  
Working Principle ◽  
The Time Domain ◽  
Conducted Emi

Various kinds of household appliances have been widely deployed in the low-voltage grid. They inject conducted noise into the power line system, which may cause a detrimental effect on the Power-line Communications (PLC) channel. This paper examines a new measurement method of conducted Electromagnetic Interference (EMI) on the PLC channel. The proposed method is to facilitate the noise characteristic research, which overcomes the potential difficulties when the measurement is performed according to CISPR 16-2-1. In particular, taking the hairdryer as an example, the conducted noises when the motor is deemed as the noise source are measured by employing the presented method. Moreover, this paper also analyzes the conducted noise of the hairdryer both in the time domain and in the frequency domain, and interprets the noise generating mechanisms with the working principle of the motor in detail. The central issue in all these studies is to research the conducted electromagnetic noise characteristics on the PLC channel.

EMI Noise Testing and Diagnosis for PV Inverter

2013 ◽  
Vol 805-806 ◽  
pp. 31-35
Author(s):  
Ying Hua Dong ◽  
Mei Yin Liu ◽  
Lei Cao
Keyword(s):  
Internal Structure ◽  
Electromagnetic Interference ◽  
Power Line ◽  
New Method ◽  
Noise Current ◽  
Pv Inverter ◽  
Result Show ◽  
Conducted Emi

In this paper, a new method is proposed to test the conducted and radiated electromagnetic interference (EMI) noise of photovoltaic invert based on analysis the internal structure and measuring principle of artificial mains network, meanwhile, the power line radiated EMI noise of photovoltaic can also be estimated by CM noise current using current probe and CM noise extraction network. The experiment result show that the conducted EMI noise and radiated EMI noise of photovoltaic inverter can be test more reasonable by this method.

Comparison of cdma and ofdm techniques for downstream power-line communications on low voltage grid

2003 ◽  
Vol 18 (4) ◽  
pp. 1104-1109 ◽  
Author(s):  
E.D. Re ◽  
R. Fantacci ◽  
S. Morosi ◽  
R. Seravalle
Keyword(s):  
Low Voltage ◽  
Power Line ◽  
Power Line Communications

Review of Channel Characterization for Power Line Communications

2010 ◽  
Vol 108-111 ◽  
pp. 771-776
Author(s):  
Nan Tian Huang ◽  
Xiao Sheng Liu ◽  
Dian Guo Xu
Keyword(s):  
High Speed ◽  
Low Voltage ◽  
Systems Design ◽  
Power Line ◽  
Digital Data ◽  
Power Lines ◽  
Suitable Model ◽  
Actual Measurement ◽  
Power Line Communications ◽  
Medium Voltage

The power line communication (PLC) channel has been a transmission medium that enables to transfer high-speed digital data through the classical electrical wires. Channel characteristics of power lines are very important for communications systems design. In order to get the suitable model for power line communications analysis and improve the PLC communication quality, researchers do lots of study about the PLC channel characterizations based on actual measurement and theoretical analysis. This paper reviews the conclusions of recent studies, summaries the characteristics of PLC channel for medium voltage power lines and low voltage power lines. The further research is also put forward.

scholarly journals Network Performance Optimization for Low-Voltage Power Line Communications

Energies ◽  
2018 ◽  
Vol 11 (5) ◽  
pp. 1266 ◽  
Author(s):  
Ying Cui ◽  
Xiaosheng Liu ◽  
Jian Cao ◽  
Dianguo Xu
Keyword(s):  
Performance Optimization ◽  
Network Performance ◽  
Low Voltage ◽  
Power Line ◽  
Power Line Communications ◽  
Network Performance Optimization

Measurement the Transmission Characteristics of the Power Line Communication Channel Based on Periodic PN Sequence

2013 ◽  
Vol 340 ◽  
pp. 567-571
Author(s):  
Pei Ling Zhang ◽  
Hong Xin Zhang
Keyword(s):  
Measurement Method ◽  
Power Line ◽  
Transmission Characteristics ◽  
Power Line Communications ◽  
Response Characteristics ◽  
Measurement Results ◽  
Vector Network Analyzers ◽  
Network Analyzers ◽  
Periodic Autocorrelation ◽  
Pn Sequences

A novel method for measurement of power line communications channel transmission characteristics on the basis of PN sequences excellent periodic autocorrelation properties is presented and discussed in this article. In order to improve the measurement precision, a compensation method in frequency domain is proposed in this paper also. This measurement method can easily and quickly obtain channel characteristics inculding reliable amplitude and phase frequency response characteristics. The measurenent experiment results basically consistent with the vector network analyzers measurement results, which has demonstrated the efficiency of the measurement method.

scholarly journals Radiation Mitigation for Power Line Communications Using Time Reversal

2013 ◽  
Vol 2013 ◽  
pp. 1-9 ◽  
Author(s):  
Amilcar Mescco ◽  
Pascal Pagani ◽  
Michel Ney ◽  
Ahmed Zeddam
Keyword(s):  
Time Reversal ◽  
Electromagnetic Interference ◽  
Low Cost ◽  
Power Line ◽  
International Standards ◽  
Electrical Network ◽  
Electrical Networks ◽  
Power Line Communications ◽  
Radiated Emissions ◽  
New Generation

Power Line Communication (PLC) is the response for nowadays high demand of multimedia services in domestic environment, not only for its fast and reliable transfer characteristics but also for its flexible low cost implementation, since the PLC technology uses the existing electrical network infrastructure and the omnipresent outlets throughout the home. The transfer of such a high bit rate through the mains network generates acceptable radiated emission regulated by international standards, but the increment in speed for new generation PLC may cause higher levels of emissions. This paper explains the use of the Time Reversal (TR) technique to mitigate radiated emissions from PLC systems. This method was probed experimentally in real electrical networks with excellent results: in 40% of the observations, the Electromagnetic Interference (EMI) generated by PLC transmission could be reduced by more than 3 dB, and this EMI mitigation factor could increase to more than 10 dB in particular configurations.

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