An improved adaptive minimum dc-link voltage controller

Gui, Cunbing; Xie, Yunxiang; Wang, Zhiping

doi:10.1587/elex.13.20160429

Cited by 3 publications

(2 citation statements)

References 8 publications

(8 reference statements)

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“…Extracting the Harmonics which need to be compensated as reference current determine the steady state compensation accuracy and dynamic response capability of the active power filter. The traditional method based on the instantaneous reactive power theory [2,3,4,5,6], when the load steps dynamically, the DClink voltage may jump greatly. The SDFT method based on the abc coordinate system has been widely used in harmonic refrence current calculation [6,7,8,9], but it has an inherent latency of 1 fundamental grid cycle [10,11], which makes the system dynamic performance becomes poor, reducing the compensation accuracy.…”

Section: Introductionmentioning

confidence: 99%

An optimized reference current detection method for active power filter

Chen

2017

IEICE Electron. Express

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An optimized reference current detection method based on synchronous reference frame transformation and sliding discrete Fourier transform (SDFT) is proposed. The proposed method can be used to extract characteristic harmonic currents as the reference current of system from the load currents by fewer sampling points, meanwhile, the numbers of harmonics need to be calculated will reduce to half of traditional method, it means that the proposed method can reduce the computational effort and easy to engineering implementation, while achieving better dynamic performance compared with other methods. The results of simulation and experiment show the validity of this method.

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Section: Introductionmentioning

confidence: 99%

An optimized reference current detection method for active power filter

Chen

2017

IEICE Electron. Express

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“…It commonly consist of outer filter, electronic converter and DC-link capacitor. The researches of APF are mainly on reference current detection [2], DC-link voltage control [3], current control [4] and modulation [5]. The interactions between grid connected devices and the grid have drawn greater attentions [6,7].…”

Section: Introductionmentioning

confidence: 99%

Linear quadratic regulator control of LC active power filter without reference current detection

Wang

Xie

Wang

2017

IEICE Electron. Express

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Active power filter (APF) is the most popular device in regulating power quality issues. Commonly, a APF controlled current by detected reference current and then tracked the reference current. However, the reference current detection sustain a large amount of computation, in addition, existing error and delay, which effect the dynamic and steady compensation performance of APF. In other hand, a optimal control is based on precise model. However, most literatures modeling in APF singly and rarely considering the impact of grid impedance and load impedance, let alone considering the impact of nonlinear load. Thus this paper established a model consist of LC APF, load and grid impedance, which included disturbance of source voltage and load harmonics current. And then applied linear quadratic regulator (LQR) optimal control in inner current loop design without reference current detection and active damping. Analyzed the effect of grid impedance and load impedance by Bode diagram. At last, compare proposed algorithm with conventional control algorithm. Verified the established model and control algorithm in MATLAB/Simulink and LC APF prototype. The results prove that the established model is correct and the proposed algorithm response fast, compensation harmonics well and is robust in a wide range of parameter variations.

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