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A finite-time control method for single-phase inverter based on disturbance observer

A single-phase inverter and disturbance observer technology, which is applied in the field of single-phase inverter finite-time control based on output feedback and finite-time disturbance observer, and single-phase inverter finite-time control, which can solve the problem of increasing system costs. , Unable to meet the requirements of fast tracking and high fault tolerance of the system, and achieve the effect of accurate tracking

Active Publication Date: 2019-03-29
SOUTHEAST UNIV
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Problems solved by technology

However, this method requires both voltage and current measurement information, and can only achieve asymptotic convergence, which increases the cost of the system to a certain extent, and cannot meet the requirements of fast tracking and high fault tolerance of the system.

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  • A finite-time control method for single-phase inverter based on disturbance observer
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  • A finite-time control method for single-phase inverter based on disturbance observer

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Embodiment Construction

[0055] The technical solutions provided by the present invention will be described in detail below in conjunction with specific examples. It should be understood that the following specific embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention.

[0056] Figure 1(a) is a block diagram of the basic control circuit of a single-phase inverter, where v o is the capacitor voltage, that is, the output voltage, v ref is the reference value of the output voltage, i L is the inductor current, C, R, L and V dc Respectively represent the filter capacitor, load resistance, filter inductance and input DC voltage source in the single-phase inverter circuit, u is the output signal of the controller, and t is time. Figure 1(b) shows the platform structure where the single-phase inverter is located. Use the voltage sensor to collect and measure the output voltage signal of the system, input it to the A / D acquisition por...

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Abstract

The invention discloses a single-phase inverter finite-time control method based on a disturbance observer, which includes establishing a disturbed state space average model of the single-phase inverter; tracking between the actual output voltage of the inverter and the reference voltage The error value is a state variable, and considering the influence of lumped disturbance, the error dynamic model of the single-phase inverter is established, and a finite time disturbance observer is designed; the output of the observer is used as a feed-forward compensation combined with an output feedback control method, A finite-time anti-jamming controller based on finite-time disturbance observer is designed; according to the finite-time anti-jamming controller, the output voltage control of single-phase inverter is realized. The invention can quickly and accurately track the reference output voltage of the single-phase inverter and accurately compensate and suppress multi-source interference and uncertainty within a limited time, and at the same time improve the anti-interference ability of the system, reduce the system cost, and improve the system efficiency. fault tolerance.

Description

technical field [0001] The invention belongs to the technical field of power electronic converters, and relates to a finite-time control method for a single-phase inverter, and more specifically, relates to a finite-time control method for a single-phase inverter based on output feedback and a finite-time disturbance observer . Background technique [0002] In recent years, single-phase inverters have been widely used in industrial fields such as uninterruptible power supplies, variable frequency power supplies, AC motor drive systems, grid reactive power compensators, wind power and photovoltaic power generation technologies, in order to reduce system costs and improve system fault tolerance Capability, non-current sensing technology has also become a research hotspot. [0003] As we all know, the control effect of single-phase inverter is very susceptible to various multi-source disturbances and uncertainties. Single-phase inverter systems are often subject to various fo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M7/48
CPCH02M7/48H02M1/0012
Inventor 李世华戴忱王佐杨俊
Owner SOUTHEAST UNIV
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