OPTIMUM SELECTION OF SPEED REGULATION PARAMETERS FOR AUTOMATIC-GENERATION CONTROL IN DISCRETE MODE CONSIDERING GENERATION RATE CONSTRAINTS

The paper deals with the optimum selection of a govenor speed regulation parameter R in the design of an appropriate governor for automatic generation control of an interconnected power system in discrete mode taking into consideration the generation rate constraint (GRC). Investigations reveal that there is no necessity for a very low value of R as is usually the practice because under realistic operation of an AGC, a larger value of R can be acceptable and can even provide better dynamic responses. A governor designed with a larger value of R will be simpler and cheaper. A sensitivity analysis for an AGC system with a higher value of R reveals that the optimum integral gain setting obtained for nominal system parameters is quite robust for a +/- 25% change in system parameters.