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Control Strategy for VSC-HVDC under Unbalanced Grid Voltages
Applied Mechanics and Materials, 2017This paper describes the use of an unbalanced control strategy to solve the faults occur in AC grid side of High voltage direct current based on Voltage Source Converter (VSC-HVDC) system. This method divides the voltage and current parameters into negative-sequence and positive-sequence.
Dan Li, Ting Ting Cai
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IEEE Transactions on Sustainable Energy, 2019
This paper presents a new method to design a current controller for grid-tied inverters under both balanced and unbalanced grid voltage conditions. The proposed controller consists of combining a feedback-output controller with a disturbance observer (DO)
R. Errouissi, A. Al‐Durra
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This paper presents a new method to design a current controller for grid-tied inverters under both balanced and unbalanced grid voltage conditions. The proposed controller consists of combining a feedback-output controller with a disturbance observer (DO)
R. Errouissi, A. Al‐Durra
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Control strategy of DC microgrid under unbalanced grid voltage
2016 IEEE 8th International Power Electronics and Motion Control Conference (IPEMC-ECCE Asia), 2016When the grid voltage is unbalanced, second order pulsation component will appear in the DC bus voltage, which will affect the voltage quality of DC microgrid. In this paper, a control method to eliminate the DC voltage pulsation component is proposed.
null Xiaorong Zhu, null Yumeng Zhang
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Control scheme of PV inverter under unbalanced grid voltage
2014 IEEE PES General Meeting | Conference & Exposition, 2014The effective control of photovoltaic inverter under unbalanced grid voltages is very important for the grid-connected operation of the photovoltaic system. The calculation of the output current reference is a key technology in the control of photovoltaic inverter under unbalanced voltage.
Huang Hao, Xu Yonghai, Yang Lin
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Nonsinusoidal power caused by measurements of grid impedances at unbalanced grid voltages
2008 International School on Nonsinusoidal Currents and Compensation, 2008At low-voltage level there is already a commercial measurement device that is able to identify the grid impedance in dependency of time and frequency. Since at the low-voltage level a four-wire system and at the medium-and high-voltage level a three-wire system is installed, the method to identify the grid impedance has to be varied.
null Trung Do Thanh +3 more
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Grid-Voltage-Oriented Sliding Mode Control for DFIG Under Balanced and Unbalanced Grid Faults
IEEE Transactions on Sustainable Energy, 2018Doubly fed induction generators (DFIGs) are widely used in variable-speed wind turbines. Despite the well-accepted performance of DFIGs, these generators are highly sensible to grid faults.
Iván Villanueva +3 more
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IEEE transactions on power electronics, 2023
Unbalanced grid faults are very harmful to the network operation. Distributed static synchronous compensator (D-STATCOM) can help to support the grid voltage by injecting the reactive power into the inductive power grid.
Xuefeng Wang, Li Peng
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Unbalanced grid faults are very harmful to the network operation. Distributed static synchronous compensator (D-STATCOM) can help to support the grid voltage by injecting the reactive power into the inductive power grid.
Xuefeng Wang, Li Peng
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An Improved Voltage-Type Grid-Connected Control Strategy for Compensating Unbalanced Voltage
2018 International Power Electronics Conference (IPEC-Niigata 2018 -ECCE Asia), 2018During grid faults, the grid-connected inverter (GCI) cannot work well by only using the traditional droop control. Besides, the unbalance factor of voltage/current at Common Coupling Point (PCC) may increase significantly. Therefore, in order to ensure GCI stable operation during grid fault, the GCI should integrate the ability to compensate for the ...
Liu Hongpeng, Zhou Jiajie, Wang Wei
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Transient operation of grid-connected voltage source converter under unbalanced voltage conditions
Conference Record of the 2001 IEEE Industry Applications Conference. 36th IAS Annual Meeting (Cat. No.01CH37248), 2002In this paper, the operation of shunt-connected voltage source converters under unbalanced voltage conditions is investigated. The attention focuses on voltage dips, thus on transient operation. The importance of using a fast and accurate method for detection of sequence components of the grid voltage affected by a fault is emphasized.
G. Saccomando, J. Svensson
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The Simulation Studies of PWM Voltage Source Rectifier under Unbalanced Grid Voltage
Applied Mechanics and Materials, 2014Under the balanced or unbalanced grid voltage, the PWM voltage source rectifiers should have many advantages such as sinusoidal input current, unity power factor, four-quadrant operation, the DC voltage stability, etc., so it can be employed in very broad application field.
Jun Li Zhang, Yu Ren Li
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