信号在电力线的衰减是影响电力线通信可靠性的最主要因素之一。为了准确分析高频信号在电力线的传输中往往要受到集肤效应以及电介损耗的影响,给出一种针对三线制电力线的高频信号传输的RLCG模型。详细分析电力线RLCG模型的建立基础,对...信号在电力线的衰减是影响电力线通信可靠性的最主要因素之一。为了准确分析高频信号在电力线的传输中往往要受到集肤效应以及电介损耗的影响,给出一种针对三线制电力线的高频信号传输的RLCG模型。详细分析电力线RLCG模型的建立基础,对基本单元长度电力线的频率特性进行测量,并利用遗传算法对其内部参数进行辨识。以RVV 3 G 2.5 mm2的普通家用三芯电力线为建模对象,并对RLCG模型得到的仿真结果与实际测量结果进行比较分析。实验与仿真结果表明,电力线RLCG模型在频域和时域上均能准确地反映电力线的高频传输特性,可以为电力载波通信系统的研究提供基础。展开更多
Telecom sectors generally operate at negative voltages to reduce the effect of corrosion caused in the metallic wire due to electrochemical reaction while communicating signals. To feed those lines and to have an effe...Telecom sectors generally operate at negative voltages to reduce the effect of corrosion caused in the metallic wire due to electrochemical reaction while communicating signals. To feed those lines and to have an effective digital data transmission, a power electronic converter referred as Modified Negative Luo Converter (MNLC) is proposed in this paper. MNLC is a high gain converter in which the output voltage increases in geometric progression. This paper portrays a novel concept of a 50 Hz pulse data transmission through RLCG (Resistance-inductance-capacitance with a shunt conductance) transmission line using MNLC. Signal frequency of 50 Hz to be transmitted is anded with a high frequency pulse that charges and discharges MNLC and produces the boosted negative output voltage. The boosted output is again transmitted through the RLCG transmission line from which 50 Hz data pulse is retrieved at the output of the transmission line by comparing with a comparator signal. This sort of MNLC aided data transmission not only introduces less loss in its transmitted data but also overcomes various health hazards of conventional radio frequency (RF) communication. This technique also proves that any data bit stream can be transmitted and retrieved using the proposed high gain DC-DC converter. The simulation model of the proposed system is implemented in MATLAB for various switching frequencies with its prototype of the converter developed and the results are verified.展开更多
文摘信号在电力线的衰减是影响电力线通信可靠性的最主要因素之一。为了准确分析高频信号在电力线的传输中往往要受到集肤效应以及电介损耗的影响,给出一种针对三线制电力线的高频信号传输的RLCG模型。详细分析电力线RLCG模型的建立基础,对基本单元长度电力线的频率特性进行测量,并利用遗传算法对其内部参数进行辨识。以RVV 3 G 2.5 mm2的普通家用三芯电力线为建模对象,并对RLCG模型得到的仿真结果与实际测量结果进行比较分析。实验与仿真结果表明,电力线RLCG模型在频域和时域上均能准确地反映电力线的高频传输特性,可以为电力载波通信系统的研究提供基础。
文摘Telecom sectors generally operate at negative voltages to reduce the effect of corrosion caused in the metallic wire due to electrochemical reaction while communicating signals. To feed those lines and to have an effective digital data transmission, a power electronic converter referred as Modified Negative Luo Converter (MNLC) is proposed in this paper. MNLC is a high gain converter in which the output voltage increases in geometric progression. This paper portrays a novel concept of a 50 Hz pulse data transmission through RLCG (Resistance-inductance-capacitance with a shunt conductance) transmission line using MNLC. Signal frequency of 50 Hz to be transmitted is anded with a high frequency pulse that charges and discharges MNLC and produces the boosted negative output voltage. The boosted output is again transmitted through the RLCG transmission line from which 50 Hz data pulse is retrieved at the output of the transmission line by comparing with a comparator signal. This sort of MNLC aided data transmission not only introduces less loss in its transmitted data but also overcomes various health hazards of conventional radio frequency (RF) communication. This technique also proves that any data bit stream can be transmitted and retrieved using the proposed high gain DC-DC converter. The simulation model of the proposed system is implemented in MATLAB for various switching frequencies with its prototype of the converter developed and the results are verified.
