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Power Oscillation Suppression in Multi-VSG Grid by Adaptive Virtual Impedance Control
IEEE Systems Journal, 2022Mei Su, Siqi Fu, Zhangjie Liu
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IEEE Transactions on Industrial Electronics, 2022 Droop control strategy is widely used to control parallel inverters in a microgrid. However, due to the mismatched line impedance, the traditional droop control strategy is difficult to evenly share the reactive power and restrain the circulating current
Josep M Guerrero +2 more
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A Control Method for Parallel Inverter with Adaptive Virtual Impedance
2018 5th International Conference on Systems and Informatics (ICSAI), 2018Aiming at the influence that the difference of line impedance of multi-inverter parallel system to accuracy of uniform power distribution in system, this paper proposes a control method based on adaptive virtual impedance and variable droop coefficient. Based on the research of adaptive virtual impedance link, variable droop coefficients control method
Ben Nie, Xiangming Li
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Virtual Impedance Adaptive Study of Parallel Virtual Synchronous Generators
2019 22nd International Conference on Electrical Machines and Systems (ICEMS), 2019As the increasing of the capacity of the micro grid, it is difficult for a single VSG-controlled inverter to meet the requirements of micro grid use. VSG operating in parallel has become the main solution, and the problem of equalization in the division has naturally become the focus of research.
Chunxue Wen, Yaozhi Huang, Qi Xiong
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Modified Adaptive Virtual Impedance Method to Compensate Mismatched Line Impedances in Microgrids
2019 IEEE Applied Power Electronics Conference and Exposition (APEC), 2019Under mismatched line impedance conditions, reactive power sharing performance of droop control tends to be barely satisfactory for the absence of sharing accuracy. Therefore, to realize accurate reactive power sharing of parallel-connected inverters in microgrids, a modified adaptive virtual impedance method is proposed in this paper.
Ronghui AN, Zeng LIU, Jinjun LIU
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Automatic virtual impedance adaptation of a knee exoskeleton for personalized walking assistance
Robotics and Autonomous Systems, 2019Abstract This paper attempts to address the problem of online modulation of virtual impedance for an assistive robot based on real-time gait and activity measurements to personalize the assistance for different users at different states. In this work, smart shoes and inertial sensors are introduced to measure ground contact forces and knee joint ...
Prudhvi Tej Chinimilli +5 more
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Adaptive Control of Haptic Interaction with Impedance and Admittance Type Virtual Environments
2008 Symposium on Haptic Interfaces for Virtual Environment and Teleoperator Systems, 2008Adaptive nonlinear controllers have been proposed to improve the stability and transparency in haptic rendering. Through a separation of control and dynamic simulation, the proposed controllers can couple impedance-type haptic devices with impedance and admittance-type virtual environment simulators.
Amin Abdossalami, Shahin Sirouspour
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Adaptive Virtual Impedance Consensus Control for Reactive Power Sharing
2020 IEEE Kansas Power and Energy Conference (KPEC), 2020This paper presents a new control method to ensure effective reactive power sharing in islanded microgrids with multiple distributed generator units (DG units) under mismatched feeder line conditions. A detailed mathematical model of primary and secondary control levels of a hierarchical control are designed to ensure accurate active and reactive power
Ahmed S. Alsafran, Malcolm W. Daniels
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DAVIC: A New Distributed Adaptive Virtual Impedance Control for Parallel-Connected Voltage Source Inverters in Modular UPS System [PDF]
IEEE Transactions on Power Electronics, 2019 In this paper, an average active power sharing control strategy based on the distributed concept for the parallel operation of voltage source inverters is proposed to be applied to the modular uninterruptible power supply (UPS) systems.
Josep M Guerrero +2 more
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Virtual impedance adaptation in a load emulator device for laboratory PV inverter testbed
2020 Fifteenth International Conference on Ecological Vehicles and Renewable Energies (EVER), 2020The paper presents an adaptive virtual impedance for load emulator control to be used in an emulator-based laboratory testbed. The target platform aims to investigate the impact of nonlinear local loads on PV systems and local storage systems as solution for higher integration of PV systems into existing low-voltage networks.
Marwa Ben Saïd-Romdhane +1 more
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