A method for testing the reaction time constant of the main servomotor of a hydroelectric generating set

Abstract

The invention discloses a test method for the reaction time constant of a main servomotor of a water turbine generator set. The method comprises that safe operation conditions are determined; grid-connection operation of a speed regulator is simulated and set in an automatic manner; the proportion amplification multiple of the regulator is set as the minimum, the integration amplification multiple as the minimum, and the differential amplification multiple as the minimum, and a permanent slip coefficient is set as 0; the manual rotating speed and opening degree dead zones of the speed regulator of a water turbine are both set as 0; the minimal displacement in the close direction of main distribution, the maximal displacement in the open direction of main distribution, the minimal open degree of a guide vane, the maximal open degree of the guide vane and a middle position z of main distribution are determined; an open-degree feedback signal of the guide vane is modified to a fixed value; the displacement of main distribution and a curve of open-degree change of the guide vane are determined; the curve is fit; and the reaction time constant of the main servomotor is calculated. The method can be used to solve the problems that the reaction time constant of the main servo motor of the water turbine generator set cannot be effectively measured by speed regulator test of the hydroelectric generating set, and the stability of the power system and the calculation accuracy are influenced.

Description

technical field [0001] The invention belongs to the control technology of a hydroelectric generating set, in particular to a method for testing the reaction time constant of a main servomotor of a hydroelectric generating set. Background technique [0002] Hydropower units play an important role in peak regulation and frequency regulation in the power system. The performance of the speed regulation system of hydropower units directly affects the safe and stable operation of the power grid. In order to ensure the safe and stable operation of power plants and power grids, it is necessary to carry out power system stability Calculation and analysis, therefore, it is necessary to establish a simulation model of the turbine and the regulation system, so that the simulation model matches the actual equipment, and provides an accurate basis for the stability calculation and analysis of the power system. In the process of establishing the simulation model of the hydraulic turbine an...

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a test method for the reaction time constant of the main servomotor of the hydroelectric generating set, so as to solve the problem that the test of the governor of the hydroelectric generating set in the prior art cannot effectively test the reaction time constant of the main servomotor of the hydroelectric generating set. The measurement makes the simulation model of the turbine and the regulating system inconsistent with the actual equipment, which affects the accuracy of the stability calculation of the power system and other issues

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