Reduction of voltage and power oscillation in the two-phase shorting of a grid inverter

Jarzyna, Wojciech; Zieliński, Dariusz; Zielinska, Katarzyna; Fatyga, Karol

doi:10.23919/epe17ecceeurope.2017.8099384

Cited by 6 publications

(7 citation statements)

References 6 publications

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“…To control the active and reactive power at the output of the converter, correct and reliable synchronisation with the distribution grid is required (Blaabjerg et al, 2006). For the purpose of synchronization, it has been proposed to use the DDSRF-PLL algorithm (Jarzyna, 2019;Jarzyna et al, 2020;Nicastri and Nagliero, 2010;Rodriguez et al, 2007;Silva et al, 2004), which operates on the basis of feedback, thereby ensuring that it is able to provide a synchronisation signal with high quality parameters even in case of strong disturbances occurring in the utility grid (Jarzyna et al, 2017). A sawtooth synchronisation signal assuming values in the range <0, 2π> is converted into a sine wave reference signal of amplitude 1.…”

Section: Four-wire Hybrid Converter With Multi-resonant Regulatorsmentioning

confidence: 99%

Control of a Four-wire Hybrid Prosumer Converter for Balancing Utility Grids

Kwaśny

Zieliński

2021

Power Electronics and Drives

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The paper presents the project of the power electronic AC/DC converter operating under a multiresonant control algorithm for prosumer applications. This design allows independent control of active and reactive power for any or each phase. Both the converter and its algorithm are based on a three-phase converter of four-wire topology (AC/DC 3p-4w) with a DC bus, which couple the converter to a renewable energy source and energy storage. Further, model and simulation tests were carried out in the Matlab-SIMULINK programming environment. The results obtained indicate that operation with deep unbalances and powers of opposite signs in individual phases results in current variations (oscillations) in the DC line, which is a significant limitation, and it can be concluded that the level of asymmetry should be limited to the level acceptable to the energy storage device.

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Section: Four-wire Hybrid Converter With Multi-resonant Regulatorsmentioning

confidence: 99%

Control of a Four-wire Hybrid Prosumer Converter for Balancing Utility Grids

Kwaśny

Zieliński

2021

Power Electronics and Drives

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“…Most works are focusing on synchronization in the UG in stable conditions, but this may not always be true. Articles [6]- [8] and [26] address the problems with the synchronization of converters in the case of disturbances in the UG.…”

Section: Active Synchronizationmentioning

confidence: 99%

“…For that reason the SRF PLL algorithm can be easily extended to any other synchronization algorithm suitable to synchronize the MG with the UG when such disturbances occur. Articles [6][7][8] and [26], [40] address problems with synchronization of converters in the case of such events on the MG or UG side.…”

Section: Synchronization Data Exchange Algoritmsmentioning

confidence: 99%

“…For checking the working of the solution, a grid side inverter with a voltage oriented control was used, developed in the authors' department laboratory. It is presented in [6]- [8] and [26]. In this model the authors change the control of the inverter from grid-feeding to grid-supporting current control.…”

Section: Simulation Of the Proposed Synchonization Strategymentioning

confidence: 99%

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Remote Micro-Grid Synchronization Without Measurements at the Point of Common Coupling

2020

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This paper presents a new strategy of active synchronization of an island micro-grid and the utility grid (UG) without measurements at the point of common coupling (PCC). This strategy is based on the assistance of Ethernet communication, GPS pulse-per-second device synchronization, and droop control parameter shift. A strategy with Ethernetassisted synchronization is used instead of synchronization with dedicated low-bandwidth communication. This strategy is based on exchanging data between two proposed devices: synchronization data sender (SDS) and synchronization data controller (SDC). The SDS calculates the UG voltage parameters and sends these data to the SDC device. The SDC is responsible for receiving synchronization data and calculating droop control parameter shift. The use of GPS-based device synchronization adds very stable and accurate measurements of synchronization parameters that correspond to the stable synchronization signal. As this strategy uses droop control method parameter change, all distributed generators share loads adequately. This strategy introduces the possibility to remove the need for measurement of voltage directly on the switch location. The proposed devices could be connected even a long distance from the PCC. The strategy also introduces the possibility of working in synchronism with the main grid despite the island mode of the micro-grid. This introduces the possibility to connect the micro-grid at the same moment as fault clear or maintenance end.

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“…The correct operation of inverters depends mainly on their topology but also on the control method. Hence, more and more works aim to optimize the inverters used in electric drive, grid [11,12], renewable energy [13], and electromobility [14,15] applications. The damage possibility caused by excessive heating of the device [16] has also led to the development of numerous techniques to estimate the temperature of both BLDC motors [17] and semiconductor junctions of transistors.…”

Section: Introductionmentioning

confidence: 99%

Influence of the Placement Accuracy of the Brushless DC Motor Hall Sensor on Inverter Transistor Losses

et al. 2022

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Low-power BLDC motors are often and willingly used in many drive devices due to their functional advantages. They are also used in advanced positioning systems, where their good dynamic performance parameters are used. The control systems use shaft position sensors mounted on motors, the structure of which is based on magnetic elements and Hall sensors. The aim of this article was to investigate the influence of the BLDC motor quality on the correct operation of the control semiconductor system. The article presents the effect of BLDC motor shaft observation system’s inaccuracies on the friction and current amplitudes of individual inverter keys. Waveforms of the controller phase currents are considered and recorded on a test bench that allows precise sensor position changes. In addition, the effect of sensor misalignment on power losses in individual inverter transistors is investigated. The article shows a significant influence of the motor shaft observation system’s assembly accuracy on the current amplitudes of individual driver transistors and their power losses, which makes it necessaryto consider these parameters when constructing power electronic systems.

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Reduction of voltage and power oscillation in the two-phase shorting of a grid inverter

Cited by 6 publications

References 6 publications

Control of a Four-wire Hybrid Prosumer Converter for Balancing Utility Grids

Control of a Four-wire Hybrid Prosumer Converter for Balancing Utility Grids

Remote Micro-Grid Synchronization Without Measurements at the Point of Common Coupling

Influence of the Placement Accuracy of the Brushless DC Motor Hall Sensor on Inverter Transistor Losses

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