Model-Based $\hbox{H}_{\infty}$ Control of a Unified Power Quality Conditioner

Kwan, Kian Hoong; Chu, Yun Chung; So, P.L.

doi:10.1109/tie.2009.2020705

Cited by 72 publications

(3 citation statements)

References 39 publications

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“…To construct a dynamic model, the grid-tied UPQC is transformed to an equivalent model, as depicted in Figure 2 [21]. As the UPQC should compensate for PQ disturbances in most connected loads, the disturbances are modeled as uncertain independent current sources.…”

Section: Upqc Stages and Continuous-time Modelmentioning

confidence: 99%

Power Quality Improvement through a UPQC and a Resonant Observer-Based MIMO Control Strategy

2021

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Performance degradation is, in general, regarded as a power quality problem. One solution to recover grid performance is through the application of a unified power quality conditioner (UPQC). Although these devices are multi-input/multi-output (MIMO) systems, the most common control strategies consist of two decoupled controllers, which neglect the coupling effects and add uncertainty to the system. For this reason, this paper proposes a multivariable resonant observer-based control strategy of a UPQC system. This method includes all significant coupling effects between this system and the grid. This strategy results in a stability-based compensator, which differs from recently proposed strategies that are based on signal calculation and cannot assure closed-loop stability. In addition, this paper introduces a simplified controller tuning strategy based on optimal conventional methods without losing closed-loop performance. It implies that the controller can be easily tuned, despite the complexity of the MIMO dynamic model. The UPQC with the resonant observer is verified on an experimental setup for a single-phase system, obtaining three relevant results for power quality improvement: (1) harmonics compensation tested with a total harmonic distortion limit of 5%; (2) sags and swells mitigation; and (3) power factor correction, achieving a unitary value on the grid side.

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Section: Upqc Stages and Continuous-time Modelmentioning

confidence: 99%

Power Quality Improvement through a UPQC and a Resonant Observer-Based MIMO Control Strategy

2021

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“…The multivariable regulator theory with H infin loop shaping, so that zero steady-state error, robustness to modeling uncertainties and insensitivity to supply frequency variations can be accomplished simultaneously, thus providing a complete theoretical solution to all the aforementioned PQ problems (Kwan and So, 2009). The design is made-up using classic control methods, all of them in the discrete-time-frequency domain and several tests in the laboratory prototype illustrate the overall dynamic and static performance of the system (Munoz et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Implementation of Space Vector Pulse Width Modulation Technique With Genetic Algorithm to Optimize Unified Power Quality Conditioner

Shankar¹

2014

American Journal of Applied Sciences

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This study proposes a novel control design of Unified Power Quality Conditioner (UPQC). This design is enabled by a control framework that employs Genetic Algorithm which determines optimum points and angle for filtering and Space Vector Pulse Width Modulation Technique (SVPWM) to offer significant flexibility to optimize waveform. In addition the same framework integrates the major functions of the UPQC with ease to unify the treatments of several power quality problems including system harmonics in the supply voltage and load current, sags/swells in the supply voltage, variations in the load demands and poor power factor at the supply side. Simulation studies on a three phase power distribution system are used to verify the performance and implementation of this control design with the UPQC.

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“…Due to the continuous variation in the plant parameters and the non linearities conditions, PI controllers may become unable to provide the required control performance [3,4]. These inherent disadvantages of the PI controllers have encouraged the replacement of this controller with adaptive [5,6] and robust [7][8][9] control laws. Adaptive control laws impose a very computation burden while H∞ robust control requires the knowledge of the disturbances boundaries [7].…”

Section: Introductionmentioning

confidence: 99%

A Digital Phase Locked Loop Speed Control of Three Phase Induction Motor Drive: Performances Analysis

Mouna¹,

Sbita²

2011

EPE

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This paper deals with performance analysis and implementation of a three phase inverter fed induction motor (IM) drive system. The closed loop control scheme of the drive utilizes the Digital Phase Locked Loop (DPLL). The DPLL is safely implemented all around the well known integrated circuit DPLL 4046. An experimental verification is carried out on one kw scalar controlled IM system drives for a wide range of speeds and loads appliance. This presents a simple and high performance solution for industrial applications.

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Model-Based $\hbox{H}_{\infty}$ Control of a Unified Power Quality Conditioner

Cited by 72 publications

References 39 publications

Power Quality Improvement through a UPQC and a Resonant Observer-Based MIMO Control Strategy

Power Quality Improvement through a UPQC and a Resonant Observer-Based MIMO Control Strategy

Implementation of Space Vector Pulse Width Modulation Technique With Genetic Algorithm to Optimize Unified Power Quality Conditioner

A Digital Phase Locked Loop Speed Control of Three Phase Induction Motor Drive: Performances Analysis

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