Method for rapidly retraining harmonic oscillation of electric power system

A power system, harmonic oscillation technology, applied in harmonic reduction devices, AC networks to reduce harmonics/ripples and other directions to achieve rapid suppression

Inactive Publication Date: 2013-06-26
王少夫
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are few reports on adaptive control methods for power system harmonic suppression

Method used

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  • Method for rapidly retraining harmonic oscillation of electric power system
  • Method for rapidly retraining harmonic oscillation of electric power system
  • Method for rapidly retraining harmonic oscillation of electric power system

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Experimental program
Comparison scheme
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Embodiment

[0028] The specific steps of the technical solution proposed by the present invention include:

[0029] The block diagram of interconnected two-machine power system is as follows: figure 1 As shown, its mathematical model is:

[0030] (1)

[0031] In the formula is the moment of inertia and damping coefficient; are the electromagnetic power and mechanical power, respectively; power max; is the disturbance power; is the disturbance frequency; is the relative angular velocity; is the relative angle of the generator. make , then formula (1) can be transformed into the following formula:

[0032] (2)

[0033] In the formula . Introduce small parameters ,Make , , , , then Equation (2) can be rewritten as

[0034] (3)

[0035] The system has a chaotic state s...

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Abstract

The invention provides a method for rapidly retraining harmonic oscillation of an electric power system. The method comprises the steps of at first, giving a principle of a chaos oscillation phenomenon, which occurs in a double-motor interconnected electric power system; and researching a threshold value area where the system generates oscillation and a non-linear oscillation condition by combining a Melnikov method. The method for rapidly retraining the harmonic oscillation of the electric power system is used for quickly restraining the harmonic oscillation of the electric power system by using a simplest self-adaptive controller, so that the conclusion accuracy is verified through a test.

Description

technical field [0001] The invention relates to a fast suppression method for harmonic oscillation of a power system, belonging to the field of electrical engineering. Background technique [0002] The power system is the guarantee for people's daily life and the normal development of the national economy. Chaos is a kind of oscillation phenomenon that may occur in the operation of complex power systems. Once it occurs, it will pose a serious threat to the safe and stable operation of the system. , nonlinear phenomena such as saddle node bifurcation, supercritical, subcritical, Hopf bifurcation, period-doubling bifurcation and chaos have also been found in interconnected power systems. [0003] In order to ensure the safe operation of the power system, this paper presents a second-order nonlinear model of a simple power system, analyzes the mechanism of the chaotic oscillation phenomenon in the system, and studies the threshold area of ​​the system oscillation and its nonlin...

Claims

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Application Information

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IPC IPC(8): H02J3/01
CPCY02E40/40
Inventor 不公告发明人
Owner 王少夫
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