Primary frequency modulation transfer adjustment method based on active power adjustment dead zone

Abstract

The invention discloses a primary frequency modulation transfer adjustment method based on an active power adjustment dead zone, and the method carries out the sharpening of the resolution of primary frequency modulation in order to prevent the adverse effect of the active power adjustment dead zone of a unit on the qualified rate of primary frequency modulation. The setting comprises the step of enhancing the primary frequency modulation target regulation quantity in order to ensure that the deviation between the unit active power target value after the primary frequency modulation regulation quantity is superposed and the unit active power actual value exceeds an active power regulation dead zone; or a strategy of reducing an active power adjustment dead zone of the unit in a primary frequency modulation action process is adopted, and an open-loop feed-forward adjustment link for carrying out auxiliary adjustment on primary frequency modulation is also set. According to the method, effective primary frequency modulation regulation can be generated even if the deviation between the unit active power target value after the primary frequency modulation regulation quantity is superposed and the unit active power actual value does not exceed an active power regulation dead zone; and meanwhile, possible adverse effects of a unit active power adjustment dead zone on the primary frequency modulation qualification rate are prevented.

Description

technical field [0001] The invention belongs to the technical field of hydropower frequency regulation, and relates to a primary frequency regulation transfer regulation method based on an active power regulation dead zone. Background technique [0002] At present, the active power adjustment modes of domestic hydropower stations mainly include the governor power mode and the governor opening mode; Closed-loop feedback adjustment is performed on the actual output value. Typically, the Three Gorges Power Station, Xiluodu Power Station, and Xiangjiaba Power Station all use the power mode of the governor to adjust the active power; The deviation from the actual value of the active power of the unit sends an adjustment pulse to the governor to correct the set value of the guide vane opening of the governor, and the governor performs a closed-loop operation on the guide vane opening according to the target value of the guide vane opening. Feedback regulation, typical examples su...

AI Technical Summary

Problems solved by technology

[0004] Practice has proved that although the above-mentioned control strategy to prevent the conflict between primary and secondary frequency modulation by means of blocking can alleviate the conflict problem of primary and secondary frequency modulation to a certain extent, it still has relatively large defects, mainly because it increases the overall complexity of the active power control strategy. In some working conditions, the stability of the active power control function is reduced, and the monitoring and stabilization mechanism for the actual value of active power that the unit's secondary frequency modulation closed-loop feedback adjustment function should have been disintegrated, resulting in a series of new The emergence of the problem has affected the safe and stable operation of the hydropower station to a certain extent

Images