摘要
针对我国配电网与美国配电网接地方式的不同,分析了配电变压器对工频信号传输过程的影响,指出我国中压配电网中性点不接地方式对工频通信信号有明显的衰减作用,并与配电变压器的连接组别相关。最后对不同的信号衰减情况提出了改进通信效果的建议,包括增大信号调制幅度,改进信号检测技术,对Yyn-0型配电变压器通过减少装置内部电感来解决上行信号调制幅度不足的问题等。
According to the differences between grounding modes of distribution networks in China and USA, the impacts of neutral grounding scheme for distribution transformers on power frequency signal transmission are analyzed and it is pointed out that the power frequency communication signals are evidently attenuated in neutral ungrounded medium-voltage distribution networks in China and the attenuation is related to the connection group scheme of distribution transformers. Some suggestions on improving communication effect of neutral ungrounded medium-voltage distribution networks in China under the conditions of different signal attenuation, including enhancing signal modulation amplitude, improving signal detecting technology, reducing built-in inductance of distribution transformer adopting Yyn-0 neutral grounding mode to increase modulation amplitude of inbound signal and so on.
出处
《电网技术》
EI
CSCD
北大核心
2009年第17期203-209,共7页
Power System Technology
关键词
工频通信
配电网
配电变压器
power frequency communication system （PFCS）
distdbution network
distribution transformer
