MODELING SYSTEM AND METHOD FOR PUMPED-STORAGE UNIT SPEED REGULATING SYSTEM

摘要

A modeling system and method for a pumped-storage unit speed regulating system. The method comprises the following steps of: identifying a proportionality coefficient and an integral coefficient in a PID link on the basis of pure proportion and pure integral measured data; identifying an integral time constant and a feedback time constant of a main distributing valve on the basis of measured data of the main distributing valve; identifying an integral time constant, a feedback time constant and an amplification coefficient of a main servomotor on the basis of measured data of the main servomotor; identifying a linear relationship coefficient between a power and an aperture on the basis of power-aperture measured data; identifying a prime mover parameter on the basis of measured data of an open-loop disturbance power; identifying generator set parameters on the basis of measured data of closed-loop power disturbance; optimizing the obtained parameters and returning the parameters to each sub-link parameter identification module, calculating model response, and iteratively optimizing the parameters continuously if a difference between the model response and the measured response exceeds a limit; otherwise, outputting a result. The system and method facilitate the rapid and accurate measured modeling for the pumped-storage unit speed regulating system.