Abstract
The rapid development of new energy brings great challenges to the frequency control of power grid, and the early adjustment of power grid frequency mainly depends on the PFC(primary frequency control) function of thermal power units. In view of the limitations of traditional PFC performance evaluation, combined with the grid’s PFC technology standards, through the history of thermal power unit operation data, by selecting appropriate PFC data section, the mathematical model based on rotational speed, the main steam pressure and actual power was established. The performance index of PFC can be calculated from the model step response. The simulation and practical operation results show that the proposed method effectively represents the PFC performance of the unit and provides one reliable means for power grid to monitor the PFC performance.
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