电力线载波通信的远程控制系统

Remote control system based on low voltage power line communication

针对电力设备远程测控系统的可靠性和经济性问题,提出了一种利用电力线载波通信的远程测控应用方案,采用电力网作为控制信息传输信道,优选了适应低压电力网信道特性的MSK(minimun shift keying)调制/解调技术,分析了MSK调制/解调技术原理,并利用MSK技术和可编程逻辑控制器(programmable logic control PLC)智能控制单元,构建了利用电力网通信的电力设备远程测控系统模型,研制了利用电力线载波通信的电力设备远程测控系统。实验结果表明:MSK调制技术较好地满足了电力网通信信道特性,实现了测控信号的可靠传输,提高了电力设备远程测控的可靠性,降低了系统成本。

In view of the reliability and the efficiency of the remote control systems for Electric Power Equipment, a remote control system is proposed in which the control information interacts by low voltage power network communication. Low voltage power network is used as the channel for control information of Electric Power Equipment. The MSK modulation and demodulation technology that is seasoned with the channel characteristics of low voltage power network were selected, while the theory of MSK is analyzed, and the remote control system model to Electric Power Equipment based on low voltage power network communication with MSK and Programmable Logic Controller is constructed. The remote control system for Electric Power Equipment is manufactured based on the model. Theoretical analysis and experimental results show that MSK can satisfy the channel characteristics of low voltage power network, realize reliable transmission of the remote control signals, and improve the reliability of the remote control system while decrease the cost.