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One-step frequency modulation control method for steam turbine

A control method and technology for steam turbines, applied in mechanical equipment, engine components, engine starting, etc., can solve problems such as unit control and safety impact, unfavorable power grid stability, and weakened capabilities.

Inactive Publication Date: 2013-06-12
HARBIN TURBINE
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Problems solved by technology

[0009] The present invention is to solve the problem that if the rotational speed variation of the existing primary frequency modulation function is set relatively small, it will affect the control and safety of the unit. If the rotational speed variation is relatively large, the ability of the unit to participate in primary frequency modulation will be weakened, which will affect the power grid. Unfavorable stability problems, and a steam turbine primary frequency regulation control method is provided

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  • One-step frequency modulation control method for steam turbine
  • One-step frequency modulation control method for steam turbine
  • One-step frequency modulation control method for steam turbine

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specific Embodiment approach 1

[0020] Specific implementation mode one: the steam turbine primary frequency modulation control method of the present implementation mode is realized according to the following steps:

[0021] Step 1: The adjustment system calculates and monitors the speed deviation in real time:

[0022] In the case that the speed variation is variable at 3% to 6%, set the frequency modulation deviation dead zone as ±2r / min, and the frequency modulation range as ±8%; wherein, the speed variation is variable at 3% to 6%. The changing situation is: when 2≤Δn<4rpms, the speed variation rate is 6%, when 4<Δn≤6rpms, the speed variation rate is 5%, when 6<Δn≤8rpms, the speed variation rate is 4%, 8<Δn When ≤9.2rpms, the speed variation rate is 3%;

[0023] Step 2: Carry out primary frequency modulation control according to the set speed variation rate, that is, the steam turbine primary frequency modulation control method is completed.

[0024] In this embodiment, Δn is the rotational speed devia...

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Abstract

The invention relates to a one-step frequency modulation control method for a steam turbine, and aims to solve the problems in a rotating speed diversity factor of a current one-step frequency modulation function that if the rotating speed diversity factor is set to be smaller, the control and safety of the turbine can be influenced, and if the rotating speed diversity factor is set to be larger, the primary frequency modulation capacity of the turbine can be weakened, which is unfavorable for the stability of an electric grid. The control method comprises the following steps: step 1, regulating a system and calculating and monitoring deviation of rotating speed in real time; and step 2, performing one-step frequency modulation control according to a set rotating speed diversity factor. The one-step frequency modulation control method is applied to the field of the turbine regulation systems.

Description

technical field [0001] The invention relates to a primary frequency modulation control method. Background technique [0002] Primary frequency regulation: For the cycle fluctuations caused by rapid load changes in the power grid, the steam turbine regulating system and the unit coordination control system use the energy storage of the boiler to automatically change the opening of the regulating door according to the change of the power grid frequency, that is, to change the power of the generator. The process of making it adapt to the random change of the grid load to meet the load change of the grid is a frequency regulation. [0003] The primary frequency regulation function of the modern generalized power grid needs to consider the mutual cooperation and restriction relationship between the steam turbine, boiler, generator and power grid, and the entire unit should be used as the control object. In terms of function, it must not only have the rapidity of primary frequenc...

Claims

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Application Information

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IPC IPC(8): F01D19/00
Inventor 林守玉王春月曲晓峰周明钢
Owner HARBIN TURBINE
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