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Active damping resonance control method for energy storage converter

A technology of energy storage converters and damping resonance, which is applied to AC networks to reduce harmonics/ripples, harmonic reduction devices, single-network parallel feeding arrangements, etc., can solve problems such as under-sampling aliasing and lag, Achieve the effects of reducing harmonic content, suppressing harmonics, and improving adaptability

Inactive Publication Date: 2019-10-25
NARI TECH CO LTD +1
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Problems solved by technology

[0005] Purpose of the invention: In view of the above problems, the present invention proposes an active damping resonance control method for energy storage converters, which uses a virtual resistance method with lead compensation to solve the problems of undersampling aliasing and lag in practical industrial applications

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  • Active damping resonance control method for energy storage converter
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  • Active damping resonance control method for energy storage converter

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Embodiment Construction

[0028] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0029] Such as figure 1 As shown, the active damping resonance control method of the energy storage converter of the present invention adopts the virtual resistance method with lead compensation, and the specific steps are as follows:

[0030] (1) Given bus voltage U dc * and the actual bus voltage U dc The difference of the inverter current given value i is obtained by the PI proportional-integral controller 1 *;

[0031] (2) Three-phase reactance current i 1 transformed into i by dq 1d i 1q , respectively with the dq component i of the inverter current given value 1d *, i 1q The difference of *, through the PI proportional integral controller to get the given reference value of the inverter voltage U d *, U q *;

[0032] (3) The current sensor collects the filter capacitor current i ca i cb i cc , after being f...

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Abstract

The invention discloses an active damping resonance control method for an energy storage converter and aims to improve an active damping control method in the prior art. A grid-connected controller utilizes a proportional-integral PI control method, a voltage loop and current loop double closed-loop path is utilized, vector transformation is utilized to convert an AC quantity into a DC quantity for adjustment; correspondingly, the proportional link output of a channel is fed back through the filter capacitor current, the AC quantity is converted into the DC quantity through vector transformation, an advanced compensation controller is utilized, and compensation control for the hysteresis caused by sampling delay and digital control is performed. The advanced compensation controller is utilized for compensation control for the hysteresis caused by sampling delay and digital control, and a sampling aliasing and lag problem in practical industrial applications is solved. The method is advantaged in that a problem of resonance suppression from the single-machine resonant frequency to multi-machine resonant frequency wide frequency range existing in the whole system after multiple inverters are connected in parallel is solved, effective suppression of harmonics is achieved, the harmonic content is reduced, and adaptability to the wide frequency range is improved.

Description

technical field [0001] The invention relates to grid-connected inverter technology, in particular to an active damping resonance control method for an energy storage converter. Background technique [0002] For a single rectifier, most of its AC side output uses a multi-order filter design to increase the ability to suppress high-order harmonics output by the inverter. However, this high-order filter design will make the inverter system There are resonant frequency points in the frequency band. [0003] In terms of research on the resonance suppression strategy of a single inverter, domestic and foreign research institutions and scholars mostly conduct research on improving the stability control of a single inverter, such as Indonesia's P.A.Dahono, Croatia's V.Blasko and India's V.Kaura, D.G.Holmes in Australia, F.Blaabjery in Denmark, M.Malinonski in Poland, S.Bernet in Germany, and F.W.Fuchs in Germany, etc., the above-mentioned experts and scholars proposed a large numbe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/01H02J3/38
CPCH02J3/01H02J3/38Y02E40/40
Inventor 王小红刘良何安然俞普德余谦蒋应伟刘建平尹航王后生
Owner NARI TECH CO LTD
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