介绍了基于过程控制对象链接和嵌入(OPC)技术的高可靠性改进比例积分微分(PID)控制励磁调节器，调节器以可编程序控制器(PLC)为主控制器扩展以太网模块实现了与监控计算机间的OPC数据交换：配合高集成度外围电路实现了频率测量、同步移相触发脉冲形成：采用改进的适应式参数自调整PID控制策略实现了鲁棒控制。论述了PLC／外围接口电路、开停机控制、励磁限制保护、改进PID控制、OPC通信等。水电厂运行表明，设计的调节器具有功能丰富、可靠性高、动静态特性良好等优点-Introduced based on object linking and embedding process control and high reliability improvement proportional integral derivative (OPC) technology (PID) control excitation regulator, the regulator with a programmable logic controller (PLC) master controller module implements Ethernet Expansion OPC data exchange between the computer and the monitor: with highly integrated peripheral circuits to achieve a frequency measurement, synchronous phase trigger pulse forming: the improved adaptive self-tuning PID control parameters to achieve a robust control strategy. Discusses the PLC/peripheral interface circuit, open parking control, excitation limit protection, improved PID control, OPC communications. Hydropower plant operation shows that the design of the regulator has a feature-rich, high reliability, good static and dynamic characteristics, etc.