Passive sliding mode control method of chaotic oscillation of power system

A power system and control method technology, applied in the direction of reducing/preventing power oscillation, electrical components, circuit devices, etc., can solve the problems of discontinuity of control law, chattering of control output results, etc., to suppress chaotic oscillation, strong robustness awesome effect

Active Publication Date: 2020-05-08
XIAN UNIV OF TECH
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  • Abstract
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AI Technical Summary

Problems solved by technology

Sliding mode control itself has the advantages of fast response, excellent transient characteristics, and good robustness to parameter changes and external disturbances. It is widely used in the field of power system control, but the control law of sliding mode control has discontinuity. This leads to the problem of chattering in the control output results

Method used

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  • Passive sliding mode control method of chaotic oscillation of power system
  • Passive sliding mode control method of chaotic oscillation of power system
  • Passive sliding mode control method of chaotic oscillation of power system

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Embodiment Construction

[0071] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0072] Such as figure 1 As shown, the present invention is a passive sliding mode control method of power system chaotic oscillation, which adopts a control strategy combining passive control and sliding mode control; when the system state is in the sliding mode region, the sliding mode variable structure control is adopted ; When the system state enters the sliding mode switching region, the sliding mode variable structure control is switched to passive control.

[0073] Specifically follow the steps below:

[0074] Step 1. Establish a mathematical model of the interconnected two-machine power system according to the dynamic equation;

[0075] The specific process of step 1 is as follows:

[0076] The mathematical model is:

[0077]

[0078] In the formula, δ=δ 1 -δ 2 is the relative electrical angle of the q-axis potential of the e...

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Abstract

The invention discloses a passive sliding mode control method of chaotic oscillation of a power system. A control strategy combining passive control and sliding mode control is adopted; when a systemstate is in a sliding mode region, sliding mode variable structure control is adopted; and when the system state enters a sliding mode switching area, the sliding mode variable structure control is switched to the passive control. The method comprises the following steps of 1, establishing a mathematical model of an interconnected dual-machine power system according to a kinetic equation; 2, simplifying the mathematical model in the step 1 to obtain a simplified model; 3, converting the simplified mathematical model in the step 2 into a standard form; 4, designing a passivity control function;5, designing a sliding mode control function; and 6, designing a switching function based on the step 4 and the step 5. In the invention, chaotic oscillation of the power system can be effectively suppressed.

Description

technical field [0001] The invention belongs to the technical field of electric power systems, and in particular relates to a passive sliding mode control method for chaotic oscillation of electric power systems. Background technique [0002] With the large-scale and comprehensive acceleration of the ubiquitous power Internet of Things and UHV transmission, the development model of large power grid interconnection will surely become the mainstream in the future. While it brings great benefits to electric energy production and consumption, it also faces stability and security. And reliability and other safety issues, such as: system oscillation, frequency collapse and voltage collapse. The power system is a typical nonlinear dynamic system. When nonlinear dynamic phenomena such as bifurcation or chaotic oscillation occur in the system, it will lead to system instability or even the disconnection of the interconnected system, which will seriously endanger the safe operation of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00H02J3/24
CPCH02J3/00H02J3/24Y02E60/00
Inventor 朱大锐王海峰王艳行程文姬段建东
Owner XIAN UNIV OF TECH
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