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Control method of wide-area time-delay damping output feedback controller considering controller saturation and based on parametric Lyapunov theory

A technology of output feedback and control method, applied in the direction of reducing/preventing power oscillation, AC network circuit, circuit device, etc., can solve problems such as system overshoot, system response desaturation, etc., and achieve the effect of low dimensionality and convenient design

Active Publication Date: 2018-11-23
WUHAN UNIV
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Problems solved by technology

This causes the system to overshoot obviously when the given step is small, and when the step is given a large value, the system responds to early desaturation phenomenon
Traditional inverse calculation methods cannot overcome this defect

Method used

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  • Control method of wide-area time-delay damping output feedback controller considering controller saturation and based on parametric Lyapunov theory
  • Control method of wide-area time-delay damping output feedback controller considering controller saturation and based on parametric Lyapunov theory
  • Control method of wide-area time-delay damping output feedback controller considering controller saturation and based on parametric Lyapunov theory

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Embodiment

[0087] One, at first introduce the method principle of the present invention.

[0088] A design of a wide-area time-delay damped output feedback controller based on parameter Lyapunov theory considering controller saturation, characterized in that: the overall framework and design block diagram of the controller are shown in the appendix of the manual figure 1 . Based on the following power system state equation:

[0089]

[0090] Considering the transfer delay and the state equation after controller saturation:

[0091]

[0092] where x(t)∈R n ,u(t)∈R m and y(t)∈R p State, input, and output vectors respectively, τ>0 means the delay of the controller input feedback signal. The function sat is the standard saturation function

[0093] sat(u)=[sat(u 1 )sat(u 2 )...sat(u m )] T

[0094] sat(u i ) = sign(u i )min{1,|u i |}

[0095] Without loss of generality, the saturation is assumed to be the unit saturation value. l n,τ =l([-τ,0],Rn) represents the Banach...

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Abstract

The invention relates to design of a wide-area time-delay damping controller, in particular to a control method of a wide-area time-delay damping output feedback controller considering controller saturation and based on a parametric Lyapunov theory. According to the integrated design of the wide-area damping controller considering controller saturation and time delay while introducing the parametric Lyapunov theory, the problem that general time-delay prediction compensation controller control parameters need a quantity of off-line simulation adjustment and experience selection can be effectively solved; due to the fact that the controller can give the explicit form of the control law and meanwhile give the specific range of the parameters, the parameters can be optimized, and thus the controller reaches the optimal dynamic performance. According to the control method, the influence of saturation nonlinearity on a system is fully considered, thus the controller is not subjected to thesaturation phenomenon from beginning to end, and the analytic expression of the controller parameters can be given to ensure stability of the system.

Description

technical field [0001] The invention relates to the design of a wide-area time-delay damping controller, in particular to a control method of a wide-area time-delay damping output feedback controller based on parameter Lyapunov theory considering controller saturation. Background technique [0002] As the scale of the power grid becomes larger and larger, interval grid interconnection becomes a trend, and the resulting low-frequency oscillation phenomenon of the interval interconnection system affects the power transmission capacity of the tie line, especially a non-attenuating equal-amplitude interval low-frequency oscillation phenomenon is more serious. It seriously affects the transmission efficiency of the interval power and the stability of the interconnection system, and may even cause the system to disassemble or collapse. Therefore, improving the damping of the system interval low-frequency oscillation has become one of the main methods to improve the stability and ro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/24
CPCH02J3/24H02J2203/20
Inventor 林涛丁贵立陈汝斯陈宝平盛逸标
Owner WUHAN UNIV
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