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An EMTP simulation of PLC receiver based on OFDM

机译：基于OFDM的PLC接收机的EMTP仿真

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摘要

DC distribution system is one of technologies for reducing the loss of electric power transmittion because the most of loads are recently driven by DC source. For a farther improvement of the efficiency, an optimum control of loads is required. Power line communication (PLC) is suitable for its communication. A simulation of a PLC for a DC distribution system based on orthogonal frequency-division multiplexing (OFDM) modulation by Electromagnetic Transients Program (EMTP) with MODELS is reported in this paper. A binary phase shift keying (BPSK) and a discrete Fourier transform (DFT) which are major elements of the OFDM is described in the MODELS. A capacitive load and a noise current cause a communication error due to the phase shift in the DFT output within the OFDM receiver. A resonance between the capacitive load and the line inductance affects the phase shift in a high frequency region. A series blocking inductor is required to improve the communication stability against the capacitive load. Although the OFDM inherently has a high tolerance to noise, the communication is interfered by a truncation error of the DFT due to the noise. These phenomena are reproduced by the proposed method including the characteristics both of the electrical circuit and the communication system.
机译：直流配电系统是减少电力传输损耗的技术之一，因为最近大部分负载由直流电源驱动。为了进一步提高效率，需要对负载进行最佳控制。电力线通信（PLC）适合于其通信。本文报道了一种基于正交频分复用（OFDM）调制的DC配电系统PLC的仿真，该调制采用电磁暂态程序（EMTP）和MODELS。在模型中描述了作为OFDM主要元素的二进制相移键控（BPSK）和离散傅里叶变换（DFT）。电容性负载和噪声电流由于OFDM接收器内DFT输出中的相移而导致通信错误。电容性负载和线路电感之间的谐振会影响高频区域的相移。需要一个串联阻断电感器来改善针对电容性负载的通信稳定性。尽管OFDM固有地具有高的噪声容忍度，但是由于噪声，通信受到DFT的截断误差的干扰。通过所提出的方法再现了这些现象，该方法包括电路和通信系统的特性。

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