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Method for directly testing speed diversity factor and stagnant rate of turbine electro-hydraulic control system

A technology of electro-hydraulic control system and test method, which is applied in the direction of engine test, machine/structural component test, measuring device, etc.

Active Publication Date: 2010-10-27
ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY +1
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

In traditional units, the speed difference rate and sluggish rate can be obtained through the four-quadrant diagram of the static test of the speed control system; for the existing steam turbine electro-hydraulic control system, there is no relatively standardized one in the open literature. Measurement method

Method used

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  • Method for directly testing speed diversity factor and stagnant rate of turbine electro-hydraulic control system
  • Method for directly testing speed diversity factor and stagnant rate of turbine electro-hydraulic control system
  • Method for directly testing speed diversity factor and stagnant rate of turbine electro-hydraulic control system

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Embodiment Construction

[0065] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0066] Precondition of the inventive method is:

[0067] 1. The turbine generator is connected to the grid, and the grid cycle is relatively stable;

[0068] 2. The main steam pressure, main steam temperature, reheat steam temperature and vacuum of the unit are near the rated value and remain basically stable.

[0069] 3. The heat recovery and steam extraction system of the unit is normally put into operation.

[0070] 4. The unit operates under the condition of single valve or sequence valve (choose to operate under normal condition).

[0071] 2. The specific steps of the test are:

[0072] 1) Determine the load measuring points, from empty load to full load, generally no less than 12 measuring points;

[0073] 2) Under the rated load, check that the main steam pressure, temperature and vacuum of the unit are near the rated value and remain stable;...

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Abstract

The invention relates to a method for directly testing speed diversity factor and stagnant rate of a turbine electro-hydraulic control system, which adopts a direct testing mode to improve testing accuracy, simplify testing process and reduce operation difficulty. The method comprises the following steps: 1) determining a detecting point of load; 2) ensuring main steam pressure, temperature and vacuum of a turbine set to be rated values and keeping stable; 3) taking the set value of rotating speed of the turbine set in case of step change as a first record, reducing gradually load by adjusting the opening degree of a governing valve and recording test data until reaching empty load on the premise of keeping stable parameters of the turbine set; 4) increasing the load step by step in the same sequence until reaching full load and recording the corresponding data; 5) obtaining the relation curve of N-delta and N-epsilon for a steam turbine generator unit; 6) inspecting whether the parameters of the speed diversity factor and the stagnant rate of the turbine set meet the requirement of speed governing characteristics of the turbine in accordance with the relation curve of N-delta and N-epsilon; and 7) amending the flow compensated curve of the valve or the overlapping degree curve of the valve in accordance with the N-delta relation curve.

Description

technical field [0001] The invention relates to a method for directly testing the speed unequal rate and sluggish rate of an electro-hydraulic control system of a steam turbine. Background technique [0002] With the gradual advancement of the national grid networking process, in order to ensure the safe and economical operation of the grid, improve the control level of power quality and grid frequency, and quickly eliminate frequency fluctuations caused by grid load changes, the grid has more and more requirements for the primary frequency regulation of a single unit. The higher the load action curve of the existing thermal power unit participating in the primary frequency regulation of the power grid is developed on the basis of the static characteristic curve of the original steam turbine hydraulic speed regulation system, the load adjustment amount of the primary frequency regulation is calculated strictly according to the steam turbine speed unequal rate, imitating the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M15/00
Inventor 李福尚郑凤才
Owner ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY
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