Primary frequency modulation feedback channel nonlinear link parameter configuration method and system

A parameter configuration method and frequency modulation feedback technology are applied in circuit devices, AC network circuits, controllers with specific characteristics, etc., and can solve the problem that the parameter determination method needs to be studied.
CN110492483AActive Publication Date: 2019-11-22NORTH CHINA ELECTRIC POWER UNIV (BAODING) +1
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
Publication Date
2019-11-22

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Abstract

The invention discloses a primary frequency modulation feedback channel nonlinear link parameter configuration method and system, and aims at a primary frequency modulation model containing a dead zone-PID controller-amplitude limiting link; the configuration method comprises the following steps: representing a nonlinear link through a description function; determining a nonlinear link gain; and according to the improved Nyquist criterion, determining the stability range of specific parameters of a single nonlinear link and the dead zone-PID controller-amplitude limiting link. According to theinvention, a reference scheme is provided for primary frequency modulation dead zone amplitude limiting link parameter setting in practical application; meanwhile, according to the improved Nyquist criterion, a curve is used for replacing an original single feature point, and compared with a traditional Nyquist criterion, the influence of the internal structure of the nonlinear link on system stability can be better reflected.
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Description

technical field

[0001] The invention belongs to the technical field of power systems, and relates to a parameter configuration method and system for a nonlinear link of a primary frequency modulation feedback channel. Background technique

[0002] For the primary frequency regulation process of the existing power system, there are some key nonlinear links in the parameter model. After the optimization and transformation of the ultra-low frequency oscillation governor in the Southwest Power Grid, its ability to participate in the grid frequency regulation is reduced, and the frequency fluctuation range of the grid is reduced. And the frequency limit increases, the frequency crosses the FM adjustment dead zone once, the number of limiting times increases, and the influence of the nonlinear link is prominent. The previous linear system analysis method is difficult to carry out effective analysis.

[0003] At present, for the dead zone in engineering practice, the parameter sele...

Claims

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