Design of microcomputer excitation regulation control system based on PLC redundancy control
In order to meet the high reliability requirements for the excitation regulation control system of turbine generator in the intelligent construction of small and medium-scale hydropower station,and effectively solve the crash problem of PLC excitation regulation control system based on single CPU,an excitation regulation control sys-tem of turbine generator was designed based on Siemens S7-1500 series PLC with redundant function.The system uses two 1513R CPUs to constitute a redundant controller,and the process control of generator excitation regulation is realized through MRP redundant loop network and distributed I/O.The excitation is regulated by PID controller which is integrated into PLC and has anti-integral saturation.The PID operation on the excitation adjustment calcu-lation result is performed by means of timed interrupt.After obtaining the thyristor control angle,the control pulse is synthesized with the generator terminal voltage synchronization signal,so as to complete the control of the excitation main circuit thyristor.
万方数据
维普
