Control method and system for distinguishing primary frequency modulation of gas turbine generator set with small disturbance and large disturbance

A large-disturbance, small-disturbance technology, applied in the direction of reducing/preventing power oscillation

Inactive Publication Date: 2020-06-26
CHINA ELECTRIC POWER RES INST +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical solution of the present invention provides a control method and system for primary frequency regulation of gas-fired units that distinguish between small disturbances and large disturbances, so as to solve the problem of how to control the primary frequency regulation of gas-fired units with small disturbances and large disturbances

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  • Control method and system for distinguishing primary frequency modulation of gas turbine generator set with small disturbance and large disturbance
  • Control method and system for distinguishing primary frequency modulation of gas turbine generator set with small disturbance and large disturbance
  • Control method and system for distinguishing primary frequency modulation of gas turbine generator set with small disturbance and large disturbance

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Embodiment Construction

[0031] Exemplary embodiments of the present invention will now be described with reference to the drawings; however, the present invention may be embodied in many different forms and are not limited to the embodiments described herein, which are provided for the purpose of exhaustively and completely disclosing the present invention. invention and fully convey the scope of the invention to those skilled in the art. The terms used in the exemplary embodiments shown in the drawings do not limit the present invention. In the figures, the same units / elements are given the same reference numerals.

[0032] Unless otherwise specified, the terms (including scientific and technical terms) used herein have the commonly understood meanings to those skilled in the art. In addition, it can be understood that terms defined by commonly used dictionaries should be understood to have consistent meanings in the context of their related fields, and should not be understood as idealized or over...

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Abstract

The invention discloses a control method and system for distinguishing the primary frequency modulation of a gas turbine generator set with small disturbance and large disturbance, wherein the methodcomprises the steps of obtaining the frequency change rates under different disturbance quantities according to the historical fault data of a power grid where the gas turbine generator set is located; when the system frequency input is larger than a preset large disturbance frequency difference dead zone and the frequency change rate is larger than a large disturbance change rate judgment value,outputting the large disturbance primary frequency modulation power, and carrying out system large disturbance frequency modulation control, wherein the large disturbance frequency difference dead zone is twice of the steady-state frequency difference; and when the system frequency input is smaller than a predetermined large disturbance frequency difference dead zone or the frequency change rate is smaller than a large disturbance change rate judgment value, outputting the common frequency modulation power, and carrying out the system small disturbance frequency modulation control.

Description

technical field [0001] The invention relates to the electrical technical field of power plants, and more specifically, to a control method and system for primary frequency regulation of a gas-fired unit that distinguishes between small disturbances and large disturbances. Background technique [0002] my country's gas-fired units are mainly concentrated in the southeast region, where a large number of DC power sources are connected. When the DC bipolar blockage occurs, the gas-fired units often need to increase their output quickly and substantially, which can greatly speed up the recovery of system frequency and reduce load shedding. If it is necessary to quickly increase the power of the gas-fired unit when a DC blocking fault occurs, it is not enough to rely solely on the existing primary frequency regulation with frequency as feedback, because the inertia of the power grid is large, resulting in the need for the system frequency to be reduced to the lowest value when a la...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/24
CPCH02J3/24
Inventor 陶向宇何凤军李文锋梁肖施壮黄兴于大海王官宏艾东平马世俊李莹魏巍贾媛周成
Owner CHINA ELECTRIC POWER RES INST
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