New energy primary frequency modulation control method and system for distinguishing small disturbance and large disturbance

A large disturbance, new energy technology, applied in the direction of reducing/preventing power oscillation

Inactive Publication Date: 2020-06-05
CHINA ELECTRIC POWER RES INST +2
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  • Summary
  • 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 modulation of new energy that distinguish between small disturbances

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  • New energy primary frequency modulation control method and system for distinguishing small disturbance and large disturbance
  • New energy primary frequency modulation control method and system for distinguishing small disturbance and large disturbance
  • New energy primary frequency modulation control method and system for distinguishing 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 new energy primary frequency modulation control method and system for distinguishing small disturbance and large disturbance, and the method comprises the steps: calculatinga frequency change curve of a power grid where a new energy station is located along with different power imbalance faults, and obtaining the frequency change rate after the preset disturbance time according to the frequency change curve; 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 large disturbance primary frequency modulation power, and conducting large disturbance frequency modulation control of the system; 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, outputtingcommon frequency modulation power, and carrying out 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 modulation of new energy sources that distinguish between small disturbances and large disturbances. Background technique [0002] At present, the new energy station has gradually put into the primary frequency regulation function, but the method of participating in the primary frequency regulation is to adjust the current frequency of the system by converting it into a power value. However, due to the large inertia of the large power grid, the system frequency drops to The minimum value takes about 10s-20s. The existing technology needs to wait for the process of the system frequency to drop, and the primary frequency adjustment speed of the new energy station is too slow. like figure 1 shown. This feature will cause the primary frequency regulation capability of new energy to gradually increase with th...

Claims

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Application Information

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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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