【摘要】 介绍了PLC励磁调节装置的硬件和软件组成。调节器采用西门子SIMATICS7 2 0 0MicroPLC 2 2 4 ,双通道结构 ,可以实现自动切换和跟踪功能。系统具有恒电压、恒励磁电流和恒无功等运行方式 ,可以任意平稳切换。最后 ,还对励磁系统进行了仿真研究 ,结果表明励磁调节系统附加电力系统稳定器后 ,系统稳定性得到极大提高。更多还原

【Abstract】 Discusses the hardware and software of PLC excitation regulator in details. Siemens SIMATIC S7-200 Micro PLC, CPU 224 for two channels is used, which can accomplish the function of automatic switching and tracking. The regulators have AVR (Automatic Voltage Regulator), FCR (Field Current Regulator), and PFR (Power Factor Regulator) modes. Each mode can be changed over to another. Finally, computer simulation on whole excitation system is made. From simulation results, conclusions can be drawn that system reliability is increased when power system stabilizer is added to the excitation system.更多还原