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针对当前变电站开关控制中存在的问题,以及变电站数字化发展方向对现有过程层设备提出的要求,提出了一种基于PLC的变电站智能接口方案。该智能接口将数字信号延伸到过程层设备,以可编程序控制器取代传统高压开关柜的继电器以及控制回路操作箱单元,以光纤代替通信电缆,接入综自系统后,PLC可实时接收遥信、遥控和保护命令并完成跳合闸控制、开关的远方操作、遥信参数及就地操作参数的上传。该智能接口具有可靠性高、抗干扰能力强及扩展性好等特点,有较好的推广价值。
Aiming at the existing problems in the switch control of substation and the requirements of the existing process layer equipment in the digital development direction of substation, a PLC based substation intelligent interface scheme is proposed. The intelligent interface extends the digital signal to the process level device, replaces the relays of the traditional high voltage switchgear and the operation box unit of the control loop with the programmable controller, replaces the communication cable with the optical fiber, after the access is integrated with the system, the PLC can receive the signal in real time Letter, remote control and protection orders and complete the trip control, remote operation of the switch, remote signaling parameters and local operational parameters of the upload. The smart interface with high reliability, anti-interference ability and good scalability characteristics, a better promotional value.