Primary frequency modulation method for correcting valve flow characteristic deviation

A valve flow and characteristic technology, applied in the direction of engine components, machines/engines, mechanical equipment, etc., can solve the problems of inconsistent frequency modulation increments, reduce difficulty and improve the performance of primary frequency modulation

Active Publication Date: 2015-12-09
ELECTRIC POWER SCI RES INST OF STATE GRID XINJIANG ELECTRIC POWER +1
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  • Abstract
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Problems solved by technology

[0005] The purpose of this application is to propose a primary frequency regulation method for correcting the valve flow characteristic deviation for the purpose of solving the inconsistency between the positive frequency regulation increment and the negative frequency regulation increment under the same load segment

Method used

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  • Primary frequency modulation method for correcting valve flow characteristic deviation

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Embodiment

[0012] Example: such as figure 1 As shown, the primary frequency modulation method to correct the valve flow characteristic deviation is to decompose the original primary frequency modulation function curve into four function curves, these four function curves include positive frequency modulation function curve, negative frequency modulation function curve, positive valve opening Correction coefficient curve, negative valve opening correction coefficient curve, the positive frequency modulation function curve, the negative frequency modulation function curve corresponds to the valve opening value of the frequency modulation load, the positive valve opening correction coefficient curve, the negative valve opening The correction coefficient curve corresponds to the correction coefficient, and the valve opening value is multiplied by the correction coefficient to obtain an accurate valve opening change corresponding to the frequency modulation increment, which is equal to the val...

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Abstract

The invention relates to a primary frequency modulation method for correcting valve flow characteristic deviation, which comprises the following steps: resolving an original primary frequency modulation function curve into four function curves, including a positive frequency modulation function curve, a negative frequency modulation function curve, a positive valve opening correction factor curve and a negative valve opening correction factor curve, wherein the positive and negative frequency modulation function curves are corresponding to the valve opening value of the frequency modulation load, and the positive and negative valve opening correction factor curves are corresponding to the correction factor; multiplying the valve opening value and the correction factor to obtain an accurate valve opening variation corresponding to the frequency modulation increment, and adding the valve opening variation to the original valve opening value to increase or reduce the valve opening value, thereby enhancing or lowering the steam inlet amount and further increasing the generating load of the set. The accurate sectionlization on the original primary frequency modulation function curve and the overall process correction on the valve opening correction factor are performed to effectively enhance the primary frequency modulation property.

Description

technical field [0001] This application relates to an optimization method for improving the primary frequency modulation performance of the unit. Specifically, for the instability of the primary frequency modulation performance caused by the large deviation of the valve flow characteristics, the frequency modulation function of the primary frequency modulation is effectively segmented, and the valve opening coefficient is corrected to achieve The purpose of optimizing primary frequency modulation performance. Background technique [0002] With new energy connected to the grid, load growth and the scale of the grid continue to increase, under the new situation of the interconnection of the UHV grid and the regional grid, the connection between the grids at all levels is becoming increasingly close, and the requirements for coordination and cooperation between the grid and the unit are also increasing. The higher the value, the primary frequency regulation in the network plant...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01D17/10
Inventor 徐强刘世军李伟艾红刘江山王斌李建龙孔德安
Owner ELECTRIC POWER SCI RES INST OF STATE GRID XINJIANG ELECTRIC POWER
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