• Title/Summary/Keyword: power line communication technology

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Implementation of PLC System based on Spectrum Sensing Function (스펙트럼 센싱 기반 전력선 통신 시스템 구현)

  • Lee, Hyun-So;Nam, Yun-Ho;Hong, Moo-Hyun;Jang, Dong-Won;Lee, Young-Hwan;Kim, Kyung-Seok
    • The Journal of the Korea Contents Association
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    • v.9 no.11
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    • pp.37-45
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    • 2009
  • Today, Internet service is a most important Information Source. So, the Power Line Communication has been achieved to offer Internet service to Last-Mile area. But, Power Line is not suitable for communication, So, electromagnetic wave is generated from Power Line during flow of communication information. And the electromagnetic wave is interfered with Wireless Communication Service using the same frequency range. In this paper, the Notch Filter and the Spectrum Sensing technology are proposed to reduction of interference between Power Line Communication and Wireless Communication Service. The Spectrum Sensing technology is the core technology of the Cognitive Radio (CR) system. CR is the technology that temporarily allocates the frequency bandwidth by scanning surrounding wireless environments to keep licensed terminals and search the unused frequency bandwidth. The proposed emulator is implemented with Spectrum Sensing and Notch Filter system using Embedded Board.

Study about Power Transformer Identification Method based on Power Line Communication Technology (전력선 통신 기법을 활용한 변압기 식별 방법에 대한 고찰)

  • Byun, Hee-Jung;Choi, Sang-jun;Shon, Sugoog
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2015.10a
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    • pp.1006-1009
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    • 2015
  • Power-line communication technology is proposed to identify power transformers to serve customers in 3 phase -4 wires power distribution systems. Mathematical models for 3-phase power transformers, 3-phase wire lines, and customer loads are described to investigate the transmission characteristics of high frequency power line carrier. From the analysis, distribution line cable circuits have only a limited ability to carry higher frequencies. Typically power transformers in the distribution system prevent propagating the higher frequency carrier signal. The proposed method uses the limited propagation ability to identify the power transformer to serve customers. A novel power transformer identification system is designed and implemented. The system consists of a transmitter and a receiver with power-line communication module. Some experiments are conducted to verify the theoretical concepts in a big commercial building. Also some simulations are done to help and understand the concepts by using MATLAB Simulink simulator.

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Machine Learning-Based Signal Prediction Method for Power Line Communication Systems (전력선 통신 시스템을 위한 머신러닝 기반의 원신호 예측 기법)

  • Sun, Young Ghyu;Sim, Issac;Hong, Seung Gwan;Kim, Jin Young
    • Journal of Satellite, Information and Communications
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    • v.12 no.3
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    • pp.74-79
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    • 2017
  • In this paper, we propose a system model that predicts the original signal transmitted from the transmitter using the received signal in the power line communication system based on the multi - layer perceptron which is one of the machine learning algorithms. Power line communication system using communication system using power network has more noise than communication system using general communication line. It causes a problem that the performance of the power line communication system is degraded. In order to solve this problem, the communication system model proposed in this paper minimizes the influence of noise through original signal prediction and mitigates the performance degradation of the power line communication system. In this paper, we prove that the original signal is predicted by applying the proposed communication system model to the white noise environment.

Unequal Power Divider using Parallel Connection Transmission Line (병렬 연결된 전송선로를 이용한 비대칭 전력 분배기)

  • Kwon, Sang-Keun;Kim, Young;Yoon, Young-Chul
    • Journal of Advanced Navigation Technology
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    • v.17 no.2
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    • pp.202-207
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    • 2013
  • In this paper, a high dividing ratio unequal power divider using parallel connection transmission line is presented. Because a very low impedance transmission line can't implement a microstrip technology, this can fabricate a parallel connection transmission line with high impedance. When we design a high dividing ratio divider, we need the very low impedance line. The parallel connection transmission line could be implemented to obtain a low impedance line characteristic. To validity this approach, we are implemented a 10:1 unequal divider at center frequency 1 GHz. The performances of power divider agree with simulation results.

Power-line Communication based Digital Home-Network Technology (전력선 통신기술기반의 디지털 홈네트워크 기술)

  • Jin, Tae-Seok
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2010.05a
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    • pp.992-995
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    • 2010
  • We propose an Power line communication, also known as Power line Digital Subscriber Line (PDSL), mains communication, power line telecom (PLT), or power line networking (PLN), or Broadband over Power Lines (BPL) are systems for carrying data on a conductor also used for electric power transmission. Power line communications can also be used to interconnect home computers, peripherals or other networked consumer peripherals. Specifications for power line home networking have been developed by a number of different companies within the framework of the HomePlug Powerline Alliance, the Universal Powerline Association and the HD-PLC Alliance.

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Efficient Signal Detection Based on Artificial Intelligence for Power Line Communication Systems (전력선통신 시스템을 위한 인공지능 기반 효율적 신호 검출)

  • Kim, Do Kyun;Hwang, Yu Min;Sim, Issac;Kim, Jin Young
    • Journal of Satellite, Information and Communications
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    • v.12 no.2
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    • pp.42-45
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    • 2017
  • It is known that power line communication systems have more noise than general wired communication systems due to the high voltage that flows in power line cables, and the noise causes a serious performance degradation. In order to mitigate performance degradation due to such noise, this paper proposes an artificial intelligence algorithm based on polynomial regression, which detects signals in the impulse noise environment in the power line communication system. The polynomial regression method is used to predict the original transmitted signal from the impulse noise signal. Simulation results show that the signal detection performance in the impulse noise environment of the power line communication is improved through the artificial intelligence algorithm proposed in this paper.

A study on the channel modeling for power line communication (전력선 통신 채널 모델링에 관한 연구)

  • Jeong Young-Hwa
    • The Journal of Information Technology
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    • v.6 no.3
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    • pp.1-10
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    • 2003
  • This paper is concerned with a power line channel modeling for the more fast and efficiently power line communication experiment. A capacitor load channel simulator is a essential equipment in the power line modem development for in-house network. We accomplished a channel modelling by the frequency response method about the total 298 capacitor load channels. This channel data is acquired by the capacitor load simulator modeling a real power line channel environment. When the experiment results acquired from the capacitor load simulator were compared with the result from a channel filter, we confirmed to substitute capacitor load experiments on the actual power line communication without big error.

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Characteristic Impedances in Low-Voltage Distribution Systems for Power Line Communication

  • Kim, Young-Sung;Kim, Jae-Chul
    • Journal of Electrical Engineering and Technology
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    • v.2 no.1
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    • pp.29-34
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    • 2007
  • The input and output impedances in a low voltage distribution system is one of the most important matters for power line communication because from the viewpoint of communication, the attenuation characteristic of the high frequency signals is greatly caused by impedance mismatch during sending and receiving. The frequency range is from 1MHz to 30MHz. Therefore, this paper investigates the input and output impedances in order to understand the characteristic of high frequency signals in the low voltage distribution system between a pole transformer and an end user. For power line communication, the model of Korea's low voltage distribution system is proposed in a residential area and then the low voltage distribution system is set up in a laboratory. In the low voltage distribution system, S parameters are measured by using a network analyzer. Finally, input and output impedances are calculated using S parameters.

Remote Control System for Textile Machinery using High Speed Power Line Communication (고속 전력선 통신을 이용한 섬유기계 원격제어 시스템)

  • Cha, Joo-Heon;Jun, Sung
    • Journal of the Korean Society of Manufacturing Technology Engineers
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    • v.20 no.1
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    • pp.1-6
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    • 2011
  • This paper describes the high speed PLC-based remote control system that can monitor and control textile machineries bi-directionally through Internet. There are many textile machineries without network functions in the factory. We apply the PLC technology in order to give a network function to them in which the existing electric power line is used with network communication lines without separate wiring constructions. In order to realize this system, we have implemented a protocol for network communication of system, high-speed PLC modules, and Ethernet-to-UART modules. Finally we confirmed the effectiveness of system by applying actual test environments.

Study on Network Throughput of Power Line Communication System in In-Building Network (전력선 통신 시스템의 구내 네트워크 데이터 처리량 연구)

  • Jang, Ho-Deok
    • The Journal of Korea Institute of Information, Electronics, and Communication Technology
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    • v.14 no.1
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    • pp.43-47
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    • 2021
  • This paper investigates the network throughput of PLC (Power Line Communication) system in the in-building network. The OFDM (Orthogonal Frequency Division Multiplexing) modulation format and adaptive bit loading algorithm is used to minimize the effect of signal loss and noise on transmission performance in the power line channel characterized by frequency selective fading. The network throughput of the PLC system which consists of gateway and CPE(Customer Premise Equipment) PLC modem in the in-building network is measured by network performance measurement tool, iperf and analyzed according to the TCP (Transmission Control Protocol) window size.