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首页> 外文期刊>Power Engineering Review, IEEE >TWACS??, A New Viable Two-Way Automatic Communication System for Distribution Networks. PART II: Inbound Communication
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TWACS??, A New Viable Two-Way Automatic Communication System for Distribution Networks. PART II: Inbound Communication

机译：TWACS ??，一种用于配电网的新型可行的双向自动通信系统。第二部分：入站通信

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A new concept of two-way automatic communication for distributed systems, henceforth abbreviated as TWACS??, is introduced in this paper. This paper restricts itself to the discussion of inbound signalling from the remote transponder units at the customer's premises to the receiver located at the substation. Inbound signalling uses current pules, precisely generated and limited to only a small segment of a half cycle of the 60 Hz wave. The inbound signal is detected in the neutral or phase bus conductor at the substation. Bit coding, multichannel assignment, detection algorithms and propagation characteristics are explained and discussed and the paper concludes with field results obtained at many different utilities. A previous companion paper [1] presents the basic functions and features of TWACS?? and describes outbound communication. This paper focuses on TWACS?? inbound communication and presents the subject as follows: ??? general description of TWACS?? inbound communication technology, ??? signal generation and propagation, ??? signal detection, ??? bit coding and multichannel signalling, ??? noise characteristics, ??? error correction and detection, ??? field experience. Using a block diagram of a typical TWACS?? installation, the operation, synchronization and performance of inbound communication is introduced. Inbound signals are generated by drawing current pulses at the remote transponder units. The actual transmitter consists of a low impedance load inductor and a pair of anti-parallel connected SCRs in parallel with the 240 V line. By limiting the on time of the SCRs the amplitude and duration of the current pulses can be controlled.
机译：本文介绍了一种用于分布式系统的双向自动通信的新概念，此后简称为TWACS ??。本文仅限于讨论从客户场所的远程应答器单元到位于变电站的接收器的入站信令。入站信令使用精确生成的当前脉冲，并且仅限于60 Hz波半个周期的一小段。在变电站的中性或相母线中检测到入站信号。解释和讨论了位编码，多通道分配，检测算法和传播特性，并以在许多不同工具上获得的现场结果作为结论。先前的一篇论文[1]介绍了TWACS的基本功能和特性。并描述出站通信。本文着重于TWACS？入站通信并提出以下主题： TWACS的一般描述？入站通信技术，???信号的产生和传播信号检测，???位编码和多通道信令，???噪声特性，???纠错和检测，???现场经验。使用典型的TWACS的框图？介绍了入站通信的安装，操作，同步和性能。入站信号是通过在远程应答器单元上提取电流脉冲来生成的。实际的变送器包括一个低阻抗负载电感器和一对与240 V线路并联的反并联SCR。通过限制SCR的导通时间，可以控制电流脉冲的幅度和持续时间。

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