An application phase-modular rectifier applied to MMC with medium voltage based on wind turbine generator

This paper proposes two stages of controller. First stage, direct power control (P-Q control) applied single-phase structure of multilevel modular converter (MMC) , multilevel cascaded H-Bridge inverter with 9-level SPWM injection to medium voltage (24kV) based on wind turbine generator (PMSG)rated capacity 25kVA. Second stage, three-phase PFC rectifier with phase-modular Y-rectifier, boosttype. The separate dc sources (DC-links) average voltage at 178V (Vdc1-Vdc12). This study is concerned with the application, operating, principle, and design example. The unity power factor operation of PMSG is realized by controlling of phase-modular Y-Rectifier system, and the current waveform distortion results increase of the lower harmonics distortion. The P-Q controller can make it possible of the grid line current phase by providing the direct instantaneous power control in the steady state under the active power and reactive power command. The data collected by PSIM and MATLAB simulation are used in comparison with the experimental tester of results. This provides guideline to further analyze and improvement energy efficiency and power quality in electrical system pertinent to wind turbine generator (PMSG). Keywords: Wind Turbine Generator, Permanent Magnet Synchronous Generator (PMSG), Phase-Modular Y-Rectifier, Cascaded H-Bridges, Modular Multilevel Converter (MMC), Power Quality, Unity Power Factor, Harmonics.

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Enhancing SCIG-based wind turbine generator performance through reactive power control

2015 Clemson University Power Systems Conference (PSC) ◽

10.1109/psc.2015.7101686 ◽

2015 ◽

Cited By ~ 2

Author(s):

Ashkan Edrisian ◽

Arman Goudarzi ◽

Innocent E. Davidson ◽

Afshin Ahmadi ◽

G. K. Venayagamoorthy

Keyword(s):

Power Control ◽

Wind Turbine ◽

Reactive Power ◽

Turbine Generator ◽

Reactive Power Control ◽

Wind Turbine Generator ◽

Generator Performance

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Flicker Mitigation in Type IV Wind Turbine Generator by Reactive Power Control

2018 International Conference on Electrical, Electronics, Communication, Computer, and Optimization Techniques (ICEECCOT) ◽

10.1109/iceeccot43722.2018.9001516 ◽

2018 ◽

Author(s):

Hemant Ramesh Kulkarni ◽

V.B. Virulkar

Keyword(s):

Power Control ◽

Wind Turbine ◽

Reactive Power ◽

Turbine Generator ◽

Reactive Power Control ◽

Wind Turbine Generator ◽

Type Iv

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Voltage Rise Regulation with a Grid Connected Solar Photovoltaic System

Energies ◽

10.3390/en14227510 ◽

2021 ◽

Vol 14 (22) ◽

pp. 7510

Author(s):

Akinyemi Ayodeji Stephen ◽

Kabeya Musasa ◽

Innocent Ewean Davidson

Keyword(s):

Power Quality ◽

Power Factor ◽

Reactive Power ◽

Voltage Regulation ◽

Photovoltaic System ◽

Voltage Amplitude ◽

Phase Voltage ◽

Unity Power Factor ◽

Voltage Rise ◽

Grid Current

Renewable Distributed Generation (RDG), when connected to a Distribution Network (DN), suffers from power quality issues because of the distorted currents drawn from the loads connected to the network over generation of active power injection at the Point of Common Coupling (PCC). This research paper presents the voltage rise regulation strategy at the PCC to enhance power quality and continuous operation of RDG, such as Photovoltaic Arrays (PVAs) connected to a DN. If the PCC voltage is not regulated, the penetration levels of the renewable energy integration to a DN will be limited or may be ultimately disconnected in the case of a voltage rise issue. The network is maintained in both unity power factor and voltage regulation mode, depending on the condition of the voltage fluctuation occurrences at the PCC. The research investigation shows that variation in the consumer’s loads (reduction) causes an increase in the power generated from the PVA, resulting in an increase in the grid current amplitude, reduction in the voltage of the feeder impedance and an increase in the phase voltage amplitude at the PCC. When the system is undergoing unity power factor mode, PCC voltage amplitude tends to rises with the loads. Its phase voltage amplitude rises above an acceptable range with no-loads which are not in agreement, as specified in the IEEE-1547 and Southern Africa grid code prerequisite. Incremental Conduction with Integral Regulator bases (IC + PI) are employed to access and regulate PVA generation, while the unwanted grid current distortions are attenuated from the network using an in-loop second order integral filtering circuit algorithm. Hence, the voltage rise at the PCC is mitigated through the generation of positive reactive power to the grid from the Distribution Static Compensator (DSTATCOM), thereby regulating the phase voltage. The simulation study is carried out in a MATLAB/Simulink environment for PVA performance.

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