Control method for mutual superposition of AGC and primary frequency modulation in opening mode

Abstract

The invention discloses a control method for mutual superposition of AGC and primary frequency modulation in an opening mode. The control method comprises: adding a unit operation water purification head signal in a speed regulator control program; adding a primary frequency modulation power action quantity signal in a speed regulator control program, and uploading the primary frequency modulationpower action quantity signal to a monitoring system; dividing out n typical test water heads according to the actual operation water level of a power station; loading from no load to rated power under each test water head, and recording the corresponding relation between the guide vane opening and the power; calculating to obtain a primary frequency modulation opening degree action quantity by aspeed regulator internal program according to the frequency deviation; performing difference calculation on the primary frequency modulation opening actuating quantity to obtain a primary frequency modulation power actuating quantity, and uploading the primary frequency modulation power actuating quantity to a monitoring system; and performing superposition by the monitoring system, performing PIDcalculation, and then adjusting the opening degree of a guide vane to maintain the stability of the frequency of the power grid. According to the method, the problem that AGC and primary frequency modulation cannot be mutually superposed in the current opening mode is solved, and safe and stable operation of a unit and a power grid is facilitated.

Description

technical field [0001] The invention relates to the field of automatic control of hydropower stations, in particular to a control method in which AGC and primary frequency modulation are superimposed on each other in an opening mode. Background technique [0002] AGC (Automatic Generation Control) controls the active output of the generator by modifying the given active output, so as to track the load change of the power system. The primary frequency regulation is that the governor responds quickly according to the deviation of the system frequency, and changes the opening of the guide vane by itself according to the set adjustment coefficient, thereby causing the change of the active power of the unit to maintain the stability of the system frequency. In actual operation, there are often contradictions between the two because sometimes they need to be adjusted at the same time or the adjustment directions are inconsistent. [0003] Regarding the cooperation relationship be...

AI Technical Summary

Problems solved by technology

These two methods are relatively reasonable, but most of the hydroelectric units adopt the opening adjustment mode due to the consideration of the stable operation of the unit. If both are allowed to be adjusted at the same time, the result can only be a frequency adjustment after the AGC adjustment is completed. At present There is still no better way to achieve the mutual superposition of the action effects of the two

Images