Statistical analysis on frequency

however

reveals that most of the system frequency difference periods are within five minutes. As the time scale of automatic generation control (AGC) process is relatively long

tracking short period frequency difference changes will result in more times of regulation and lower regulating efficiency of the units. It has been found from further research that the frequency difference mean has a useful regularity in a fairly long time scale. For this reason

a control performance standard (CPS) control strategy based on future frequency difference anticipation is presented. Simulation results show that the new strategy is able to achieve high-level CPS index with less unit regulations

as well as high efficiency and low wear and tear.