【摘要】 双向工频电力通信的基本原理是利用工频电压基波波形过零信息实现信号的调制和解调。针对双向工频电力通信信号的特点,分析了其独特的信号编码方式,利用信号编码的正交特性,实现了输入信号的多路传输,提高了通信效率;提出了基于差分技术的工频通信信号的提取,该方法可有效消除谐波对TW ACS信号的影响,并增加信号强度。理论分析和仿真结果证明了该方法的可行性。更多还原

【Abstract】 The Two Way Automatic Communication System(TWACS) is implemented by modulating the power voltage at preselected zero of the voltage waveform of the distribution network.According to the characteristics of TWACS signal,its unique signal decoding mode is analyzed in the paper.Multi-channel transmission is achieved taking advantage of the orthogonal character of signal encoding,which can improve communication efficiency.The differential detection technique of TWACS signal is presented to eliminate harmonic interference and increase the signal strength.The theoretical analysis and simulation result indicate the feasibility of the proposed method.更多还原