Optimal Design and Control Implementation of UPQC Based on Variable Phase Angle Control Method

Ye, Jian; Gooi, Hoay Beng; Wu, Fengjiang

doi:10.1109/tii.2018.2834628

Cited by 73 publications

(42 citation statements)

References 22 publications

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“…Many scholars have conducted extensive research on UPQC. In [20], a two-stage algorithm was proposed to select the minimum ratings of the shunt converter and series converter of the UPQC in order to obtain the maximum utilization rates of the power converters in the UPQC. The work in [21] introduced a UPQC without series transformers, controlled by algorithms based on the active and non-active currents together with PLL circuits.…”

Section: Literature Reviewmentioning

confidence: 99%

Design and Implementation of Novel Multi-Converter-Based Unified Power Quality Conditioner for Low-Voltage High-Current Distribution System

et al. 2018

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This paper introduces a novel multi-converter-based unified power quality conditioner (MCB-UPQC). Three optimization methods are proposed based on the traditional UPQC: (1) The shunt converter is substituted with multi-modular parallel converters. Hence, the reactive power and harmonic currents can be increased greatly, which are suitable for low-voltage high-current distribution systems. (2) The series converters consist of three H-bridge inverters, and each of the H-bridge inverters is controlled separately. The control strategy is easier to achieve and can improve the control performance of voltage regulation under unbalanced voltage sag or swell. (3) A three-phase four-leg (3P4L) converter is connected to the common DC bus of the proposed UPQC to connect the renewable energy and energy storage system. The detailed mathematical models of shunt and series converters are analyzed, respectively. A multi-proportional resonant (PR) controller is presented in the voltage regulation and reactive power compensation control algorithms. The simulation results verify the feasibility of the control algorithms. Finally, the experimental platform is established, and the experimental results are presented to verify the validity and superiority of the proposed topology and algorithms.

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Section: Literature Reviewmentioning

confidence: 99%

Design and Implementation of Novel Multi-Converter-Based Unified Power Quality Conditioner for Low-Voltage High-Current Distribution System

et al. 2018

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“…Additionally, a higher penetration of renewable energy brings more challenges to power quality as well as new opportunities. In this context, many researchers dedicate to the study of unified power quality conditioner (UPQC) [22][23][24], an integrated equipment combined with series and shunt APFs to simultaneously achieve superior mitigation over most current and voltage imperfections. Thus a significant improvement was done presenting the combination with UPQC and distributed generation in [25], which deals with the problems of voltage sags/swells, short interruptions, harmonic, and reactive power.…”

Section: Introductionmentioning

confidence: 99%

Control Strategy of Intergrated Photovoltaic-UPQC System for DC-Bus Voltage Stability and Voltage Sags Compensation

Yang

Gao

et al. 2019

Energies

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Power quality problem, because of its various forms and occurrence frequency, has become one of the most critical challenges confronted by a power system. Meanwhile, the development of renewable energy has led to more demands for an integrated system that combines both merits of sustainable energy generation and power quality improvement. In this context, this paper discusses an integrated photovoltaic-unified power quality conditioner (PV-UPQC) and its control strategy. The system is composed of a series compensator, shunt compensator, dc-bus, and photovoltaic array, which conducts an integration of photovoltaic generation and power quality mitigation. The fuzzy adaptive PI controller and the improved Maximum Power Point Tracking (MPPT) technique are proposed to enhance the stability of dc-bus voltage, which is aimed at the power balance and steady operation of the whole system. Additionally, the coordinate control strategy is studied in order to ensure the normal operation and compensation performance of the system under severe voltage sag condition. In comparison to the existing PV-UPQC system, the proposed control method could improve the performance of dc-bus stability and the compensation ability. The dynamic behavior of the integrated system were verified by simulation in MATLAB and PLECS. Selected results are reported to show that the dc-bus voltage was stable and increased under severe situations, which validates the effectiveness of the proposed integrated PV-UPQC system and its control strategy.

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“…After a rigorous literature survey was conducted, it can be summarized that the research on UPQCs is mainly focused on its topology, compensation instruction detection, compensation control strategy, etc. [12][13][14][15][16][17][18][19][20][21][22][23][24][25]. In regard to topology, a novel ten-switch topology for unified power quality conditioner was proposed in Reference [12].…”

Section: Introductionmentioning

confidence: 99%

“…A UPQC voltage sag detection based on the chaotic immune genetic algorithm was proposed in Reference [16]. As for a control strategy, there is literature focused on control of UPQCs [17][18][19][20][21][22][23][24][25]. A coordinated control strategy based on reactive power flow in a UPQC was proposed in Reference [19].…”

Section: Introductionmentioning

confidence: 99%

“…A coordinated control strategy based on reactive power flow in a UPQC was proposed in Reference [19]. Furthermore, the optimal design and control implementation of a UPQC based on variable phase angle control method was proposed in Reference [22]. Improvement of unified power quality conditioner performance with an enhanced resonant control strategy was proposed in Reference [24].…”

Section: Introductionmentioning

confidence: 99%

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The Voltage Control Strategy of a DC-Link Bus Integrated Photovoltaic Charging Module in a Unified Power Quality Conditioner

Wang

2019

Energies

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In order to improve the functionality and efficiency of a unified power quality conditioner (UPQC), a DC-link bus integrated photovoltaic charging module is proposed in a UPQC. It can generate power for essential loads apart from providing energy to a DC-link bus. A conventional proportional integral (PI) controller fails to run smoothly in dynamic conditions of the micro-grid, since it has poor capabilities in determining suitable values of proportional gain and integral gain. So, the optimization algorithm for a PI controller based on chaos particle swarm optimization based on a multi-agent system (CPSO-MAS) algorithm was developed in this paper to overcome properties such as intermittent instability in the micro-grid. Through verification by simulation and experiment of UPQC harmonic compensation, it showed that the proposed DC link bus voltage control strategy can be effectively applied to UPQC towards various conditions related to voltage and current distortion. In addition, it proved that the proposed strategy has faster convergence than other algorithms, which enhances the stability of DC-link bus voltage. Hence, the contribution presented in this paper is to provide a novel approach for the power quality improvement of UPQC.

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Optimal Design and Control Implementation of UPQC Based on Variable Phase Angle Control Method

Cited by 73 publications

References 22 publications

Design and Implementation of Novel Multi-Converter-Based Unified Power Quality Conditioner for Low-Voltage High-Current Distribution System

Design and Implementation of Novel Multi-Converter-Based Unified Power Quality Conditioner for Low-Voltage High-Current Distribution System

Control Strategy of Intergrated Photovoltaic-UPQC System for DC-Bus Voltage Stability and Voltage Sags Compensation

The Voltage Control Strategy of a DC-Link Bus Integrated Photovoltaic Charging Module in a Unified Power Quality Conditioner

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