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Method for restraining power anti-tune by shielding jamming signal at start time of sudden load change of electric generator

A generator power and interference shielding technology, applied in the direction of controlling generators, electrical components, control systems, etc., can solve problems such as power reverse adjustment of speed control systems, and achieve the effects of easy implementation, easy parameter setting, and simple steps

Active Publication Date: 2014-11-19
STATE GRID CORP OF CHINA +4
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0023] The purpose of the present invention is to solve the problem of power reverse adjustment of the speed control system when the generator load changes suddenly, and propose a method to suppress the power reverse adjustment by shielding the interference signal at the beginning of the generator load sudden change

Method used

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  • Method for restraining power anti-tune by shielding jamming signal at start time of sudden load change of electric generator
  • Method for restraining power anti-tune by shielding jamming signal at start time of sudden load change of electric generator
  • Method for restraining power anti-tune by shielding jamming signal at start time of sudden load change of electric generator

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Embodiment 1

[0082] Attached below figure 2 for further clarification.

[0083] The logic block diagram of shielding the interference signal and suppressing the power reverse adjustment at the beginning of the generator load sudden change, including: the generator power signal P E , Turbine power given command P ref , turbine speed ω, generator power instantaneous change rate Instantaneous change rate of steam turbine power given command Turbine power given command variation ΔP ref , Instantaneous change rate of steam turbine speed Speed ​​module 1, comparison module 2, comparison fixed value setting module 3, comparison module 4, comparison fixed value setting module 5, OR gate 6, speed module 7, comparison module 8, comparison fixed value setting module 9, comparison module 10. Comparison fixed value setting module 11, NOR gate 12, first-order inertia module 13, lead lag module 14, lead lag module 15, comparison module 16, comparison fixed value setting module 17, comparison mod...

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Abstract

The invention discloses a method for restraining power anti-tune by shielding a jamming signal at the start time of sudden load change of an electric generator. The method includes the basic steps that as a disturbance signal of power anti-tune is led into a load controller at the start time of the sudden load change of the electric generator and represents the characteristics of being strong at beginning and weak later and rapidly declining, the load controller of a speed adjusting system is modified, the jamming signal is shielded from the start time of the sudden load change of the electric generator to the time when the disturbance signal declines to zero, the disturbance signal does not enter the load controller, and power anti-tune of a turbine is eliminated.

Description

technical field [0001] The invention belongs to the control field of the speed regulating system of the electric power system, and specifically relates to providing a method for preventing the reverse adjustment of the power of the steam turbine when the load of the generator changes suddenly for the steam turbine generator set. Background technique [0002] The speed control system is used in power plants to control the speed and power of steam turbines. The speed regulation system is mainly composed of frequency regulation controller, load controller and regulating level pressure controller. When the unit is in load control state, it is mainly completed by frequency regulation controller and load controller. [0003] The frequency modulation controller is a controller adopting the proportional control law, which is established for the generator set to participate in the primary frequency regulation of the power grid under the load control state. The frequency modulation c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P9/10
Inventor 于永军李晖张文景焦春雷刘建琴郑巍易海琼梁新艳钱华东刘娜
Owner STATE GRID CORP OF CHINA