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Method for testing response time constant of main servomotor of hydraulic turbine governor

A main relay and reaction time technology, applied in the testing of machine/structural components, engine testing, instruments, etc., can solve problems such as incompatibility, achieve the effect of simple testing process and improve simulation accuracy

Active Publication Date: 2011-08-17
SHAANXI ELECTRIC POWER RES INST +1
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Problems solved by technology

[0007] The purpose of the present invention is to propose a technical method for on-site measurement of the reaction time constant of the main servomotor of the hydraulic turbine governor, which solves the problem that the current test method for the reaction time constant of the main servomotor of the hydraulic turbine governor is not suitable for modern microcomputer governors technical problem

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  • Method for testing response time constant of main servomotor of hydraulic turbine governor
  • Method for testing response time constant of main servomotor of hydraulic turbine governor
  • Method for testing response time constant of main servomotor of hydraulic turbine governor

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Embodiment Construction

[0022] figure 1 It is a schematic diagram of the structure of the turbine governor. The modern turbine governor is mainly composed of two parts: the microcomputer governor and the servo system. The microcomputer governor is the control part of the turbine governor, and it receives instructions to adjust the governor output. The follow-up system is the actuator of the turbine governor, which generally includes power amplifier, electric / hydraulic conversion, main pressure distribution valve, and main servomotor. It accepts the output from the regulator and controls the action of the main servomotor.

[0023] figure 2 The relationship curve between the relative speed dy / dt of the main servomotor of the water turbine governor and the frequency disturbance, the abscissa is the relative value of the frequency deviation input to the governor, the frequency reference value is 50Hz, and the ordinate is the water turbine under the corresponding input frequency deviation The relative s...

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Abstract

The invention discloses a method for testing the response time constant of a main servomotor of a hydraulic turbine governor, comprising the following steps: setting the adjustment parameters of the governor under the condition that the hydraulic turbine is in a static state; applying an absolute-value gradually increased positive-negative frequency step disturbance signal of the governor under the condition that the governor is in an automatic state, starting or stopping the main servomotor of the governor at a certain constant speed, moving a main distributing valve to a certain position in the starting or stopping direction from the middle position, and recording the speed of the main servomotor and the displacement of the main distributing valve; and calculating the response time constant Ty of the main servomotor according to the data obtained in the steps. The testing process is simple, and only a series of positive-negative frequency step disturbance tests is carried out. The data used in the test, comprising the main servomotor stroke, the main distributing valve displacement and the adjustor output yPID, can be easily collected.

Description

technical field [0001] The invention relates to the reaction time T of the main servomotor in the water turbine speed governor model used for power system analysis and calculation y test method. Background technique [0002] The turbine governor is the most important control component of the hydroelectric generating set, the main servomotor is the actuator of the governor, and the main servomotor response time constant T y As the most important parameters of the actuator, the correctness and accuracy of the parameters are directly related to the results of the simulation calculation of the power system, and it is required to use the measured values ​​in the simulation calculation of the model. Since the 1990s, turbine governors have developed rapidly, and the units of large and medium-sized hydropower plants have been replaced by microcomputer governors from early mechanical buffer governors. The structure of the gearbox is quite different. [0003] At present, there are ...

Claims

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Application Information

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IPC IPC(8): G01M15/00
Inventor 李华万天虎
Owner SHAANXI ELECTRIC POWER RES INST
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