Method for suppressing chaotic oscillation of four-order power system with excitation limitation

A power system and excitation limitation technology, applied in the direction of reducing/preventing power oscillation, electrical components, circuit devices, etc., can solve problems that are difficult to apply to power systems

Active Publication Date: 2020-10-23
SHANDONG UNIV OF SCI & TECH
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  • Claims
  • Application Information

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Problems solved by technology

Among the many chaotic oscillation control methods proposed, many are aimed at simple second-order power systems, which are difficult to apply to actual power systems

Method used

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  • Method for suppressing chaotic oscillation of four-order power system with excitation limitation
  • Method for suppressing chaotic oscillation of four-order power system with excitation limitation
  • Method for suppressing chaotic oscillation of four-order power system with excitation limitation

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Embodiment Construction

[0032] The specific embodiment of the present invention will be further described below in conjunction with accompanying drawing and specific embodiment:

[0033] A method for suppressing chaotic oscillation of a fourth-order power system containing excitation limitation, comprising the following steps:

[0034] Step ①: Establish the mathematical model of the fourth-order power system. When the power system generates chaotic oscillation, determine the value of each parameter in the power system. The mathematical model of the fourth-order power system is formula (1):

[0035]

[0036] Among them, δ is the relative angle of the generator rotor; ω is the relative angular velocity of the generator rotor; E′ is the transient potential of the generator stator side; E fdr is the input of the excitation limiter; M is the moment of inertia of the generator; f 0 is the system voltage frequency; D is the damping coefficient of the generator; P T is the mechanical input power of the ...

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Abstract

The invention discloses a method for suppressing chaotic oscillation of a four-order power system with excitation limitation, and relates to the technical field of electrical engineering. The method comprises the following steps of: determining a value of each parameter in the power system when the power system generates chaotic oscillation; based on nonsingular terminal sliding mode control, designing a nonsingular terminal sliding mode controller to suppress chaotic oscillation of the power system; adding self-adaptive control on the basis of the nonsingular terminal sliding mode controller,designing a self-adaptive nonsingular terminal sliding mode controller, and estimating a damping coefficient and mechanical power of the system through a self-adaptive rate designed in the self-adaptive control, wherein the designed controller can further successfully restrain chaotic oscillation of the power system under the condition that the damping coefficient and the mechanical power are uncertain; and adding the designed self-adaptive nonsingular terminal sliding mode controller into a four-order chaotic power system, and verifying the control effect of the self-adaptive nonsingular terminal sliding mode controller through simulation.

Description

technical field [0001] The invention relates to the technical field of electrical engineering, in particular to a method for suppressing chaotic oscillation of a fourth-order power system with excitation limitation. Background technique [0002] Chaos is a kind of random phenomenon generated in a nonlinear system, which refers to a certain nonlinear system, under certain conditions, its state quantity will present a complex phenomenon similar to randomness. As a typical complex nonlinear system, the power system has complex chaotic dynamic behaviors. When the parameters in the power system change or are disturbed by the outside world, it is easy to generate chaotic oscillations. The chaotic oscillations in the power system will cause voltage instability and collapse, seriously affect the safe and stable operation of the power system, and even cause large-scale Power outage accidents cause huge losses and serious harm to the economy and people's lives. [0003] In order to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00H02J3/24
CPCH02J3/002H02J3/24H02J2203/20Y02E60/00
Inventor 于永进王家斌吉兴全张超李明华高丽
Owner SHANDONG UNIV OF SCI & TECH
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