Method for logic superposition of primary frequency modulation and monitoring system AGC

Abstract

The invention relates to a method for the logic superposition of primary frequency modulation and monitoring system AGC. The method comprises the steps that when a frequency difference is generated bya power grid frequency, a speed regulator performs primary frequency modulation action, and a unit guide vane is controlled to perform opening action in an opening mode; a primary frequency modulation action power value of the speed regulator is sent to a monitoring system through a channel from the speed regulator to the monitoring system, AGC and primary frequency modulation superposition is carried out in the monitoring system, a power difference value is calculated through unit power feedback, and if the difference value exists, a speed regulator guide vane is controlled to be given, theguide vane opening degree is adjusted, and the unit power is adjusted through pulses; and the adjustment is finished until the difference value between the superposed power and the power feedback is 0, and the unit power closed loop is completed. The method can effectively realize the effective superposition of the primary frequency modulation action of the speed regulator and AGC power regulationof the monitoring system during primary frequency modulation action in the opening mode of the speed regulation system, improves the primary frequency modulation performance of a hydroelectric generating set, meets the standard requirements, and enhances the stability of a power grid.

Description

technical field [0001] The invention belongs to the technical field of hydropower generation, and in particular relates to a method for logic superposition of primary frequency modulation and monitoring system AGC. Background technique [0002] At present, the speed control system of the hydroelectric unit works in the opening mode, which is a small closed-loop control, and the monitoring system is in the power mode, which is a large closed-loop control. The specification requires that when the primary frequency modulation of the unit speed governor system and the AGC of the monitoring system operate at the same time, they should be able to superimpose the response; However, in the opening mode of the actual speed control system, when the primary frequency regulation and AGC respond at the same time, the control value of the primary frequency regulation of the governor will be pulled back by the monitoring system AGC, resulting in the final output of the primary frequency reg...

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a method for superimposing primary frequency modulation and monitoring system AGC logic. Aiming at the problem of cooperating with the AGC power adjustment logic of the monitoring system under the opening mode of the current hydroelectric unit speed control system, a new method is created between the speed governor and the monitoring system. Add a channel. When the governor performs a frequency modulation action, the power calculation value of a frequency modulation action is sent to the monitoring system through this channel, and the AGC power given value and the governor’s frequency modulation action value are superimposed on the monitoring system, which is completed by the monitoring system. Power closed loop, so as to achieve the superposition of the first frequency modulation and the AGC power regulation of the monitoring system in the governor opening mode

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