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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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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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IEEE Transactions on Industrial Electronics, 2019
This paper proposes an observer-based grid-voltage sensorless strategy that allows to implement the synchronization and control of an LCL grid-tied voltage source inverter. By using exclusively the measurement of the current injected to the grid, an observer estimates both fundamental positive- and negative-sequence components of the grid voltage ...
Roberto A. Fantino +2 more
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This paper proposes an observer-based grid-voltage sensorless strategy that allows to implement the synchronization and control of an LCL grid-tied voltage source inverter. By using exclusively the measurement of the current injected to the grid, an observer estimates both fundamental positive- and negative-sequence components of the grid voltage ...
Roberto A. Fantino +2 more
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2012 IEEE International Symposium on Industrial Electronics, 2012
In this paper, a novel control scheme to mitigate the grid current distortion due to grid voltage disturbance is proposed for a grid-connected voltage-source converter (VSC) with inductor-capacitor-inductor (LCL) filters. Voltage unbalance and harmonics in three-phase systems cause the DC-link voltage ripples and the grid current distortion.
Thanh Hai Nguyen, Dong-Choon Lee
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In this paper, a novel control scheme to mitigate the grid current distortion due to grid voltage disturbance is proposed for a grid-connected voltage-source converter (VSC) with inductor-capacitor-inductor (LCL) filters. Voltage unbalance and harmonics in three-phase systems cause the DC-link voltage ripples and the grid current distortion.
Thanh Hai Nguyen, Dong-Choon Lee
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Advanced Control of Grid-Connected Current Source Converter Under Unbalanced Grid Voltage Conditions
IEEE Transactions on Industrial Electronics, 2018There are technical challenges when the grid-connected current source converter operates under unbalanced grid voltage conditions. The negative sequence component of the unbalanced grid voltage would result in the low-frequency ripple at dc side, as well as current harmonics at ac side. It has an adverse impact on the system operation.
Xiaoqiang Guo 0002 +2 more
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Research on the Performance of DDSRF-PLL under Unbalanced Grid Voltage
2023 CAA Symposium on Fault Detection, Supervision and Safety for Technical Processes (SAFEPROCESS), 2023Zetao Feng +5 more
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Reference current generation schemes for DFIG with unbalanced grid voltage
2014 IEEE 2nd International Conference on Electrical Energy Systems (ICEES), 2014This paper presents two improved schemes for reference current generation for improved dynamic performance of a Doubly-Fed Induction Generator (DFIG) subjected to unbalanced grid voltage. The focus is on estimating the oscillating power components in addition to the steady state power required from the generator without the need for sequence ...
C. Nagamani +3 more
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An Effective Reference Generation Scheme for DFIG With Unbalanced Grid Voltage
IEEE Transactions on Sustainable Energy, 2014This paper presents a reference current generation scheme for improved dynamic performance of a doubly fed induction generator (DFIG) subjected to unbalanced grid voltage. The power and torque oscillations induced due to the unbalance in grid voltage are minimized using additional compensatory terms in the reference currents. The focus is on estimating
M. A. Asha Rani +3 more
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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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Control of Grid-connected Inverters Under Unbalanced Voltage Sag
2023 International Conference on System Science and Engineering (ICSSE), 2023openaire +1 more source