Results 161 to 170 of about 1,667,756 (205)

Modified Adaptive Virtual Impedance Method to Compensate Mismatched Line Impedances in Microgrids

2019 IEEE Applied Power Electronics Conference and Exposition (APEC), 2019
Under 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
openaire   +1 more source

A Virtual Impedance-Based Active Damping Control Strategy for Triple Active Bridge Converter

IEEE transactions on industrial electronics (1982. Print)
Multiport dc–dc converters have been intensively concerned and studied in power electronics-based systems. However, the instability issue and its suppression method are rarely discussed. This article investigates the stability of the triple active bridge
Haoyuan Yu, Hanwen Zhang, Qi Zhang, Yanbo Wang, Zian Qin, Zhe Chen, P. Bauer   +6 more
semanticscholar   +1 more source

New Framework of RoCoF-FD for Wideband Stability Evaluation in Renewable Energy Generators With Virtual Impedance Control

IEEE Transactions on Smart Grid, 2022
This research proposes a new perspective for identification of wideband stability in virtual synchronous generator (VSG) with virtual impedance control strategy.
Chang Li, Yijia Cao, Yaqian Yang, Jiazhu Xu, Min Wu, Weiming Zhang, T. Dragičević   +6 more
semanticscholar   +1 more source

Decentralized complex envelope controller for ASAC by virtual mechanical impedances

2014 IEEE/ASME International Conference on Advanced Intelligent Mechatronics, 2014
The problem of Active Structural Acoustic Control (ASAC) is to attenuate the radiated sound power by energy injection using structural actuators to modify deflection shapes. Collocated and dual actuator-sensor pairs allow the feedback problem to be formulated as the implementation of virtual mechanical impedances.
Michau, Marc, Micheau, Philippe, Boulandet, Romain, Berry, Alain, Herzog, Philippe   +4 more
openaire   +2 more sources

A Variable Virtual Impedance Current Limitation Strategy of Grid-Forming Energy Storage-STATCOM

IEEE Transactions on Power Delivery
Compared to grid-following STATCOM, grid-forming STATCOM possesses voltage-mode characteristics, enhancing its stability and proactive voltage support capability in weak grid conditions.
Feng Wang, Jianzhong Xu, Gen Li
semanticscholar   +1 more source

Virtual External Perturbance-Based Impedance Measurement of Grid-Connected Converter

IEEE transactions on industrial electronics (1982. Print)
The impedance of grid-connected converter (GCC) is crucial for the small-signal stability analysis of the renewable-energy system. Traditionally, the impedance of the power-electronic device is measured by primary-side perturbance method, connecting a ...
Quansen Rong, Pengfei Hu, Yanxue Yu, Dong Wang, Yu Cao, Huanhai Xin   +5 more
semanticscholar   +1 more source

Virtual Impedance Shaping for low voltage Microgrids

2020 IEEE Applied Power Electronics Conference and Exposition (APEC), 2020
AC Microgrids, in presence of highly non-linear loads, require a tighter regulation of line voltage to maintain power quality. This article proposes an outer virtual impedance loop to shape the output voltage in such microgrids. In order to achieve this, a virtual impedance extracting and shaping filter is first proposed to extract and weigh selected ...
Sourav Patel, Soham Chakraborty, Subhrajit Roychowdhury, Murti V. Salapaka   +3 more
openaire   +1 more source

Carbon Fiber Robot Manipulator with Virtual Impedance Control

ARIŞ
This paper presents an experimental study comparing a robot manipulator's performance constructed with aluminum alloy and carbon fiber components. In addressing safety concerns, we evaluate the collision avoidance strategy known as Virtual Impedance ...
Chien-Yao Tseng, Han-Pang Haung
semanticscholar   +1 more source

Parameter Optimization of Virtual Impedance for Parallel Inverter

Advanced Materials Research, 2014
This paper deals with parameter optimization of virtual impedance of parallel inverter. Conventional design methods determine parameters by observing the changes of amplitude-frequency and phase frequency curves of the equivalent impedance. However, those methods always neglect the dynamic performance of inverters in parallel.
Ping Wang, Liu Yang
openaire   +1 more source

Inverter Control Based on Virtual Impedance Under Unbalanced Load

2020 IEEE 29th International Symposium on Industrial Electronics (ISIE), 2020
Three-phase four-leg inverter combined with appropriate control method has a good performance when facing the unbalanced load. The three-phase four-leg inverter can generate three-phase balanced voltage under unbalanced load and improve the capacity of the inverter. However, as a result of positive sequence, negative sequence and zero sequence currents
Kang Ge, Zeng Fan, Ling Fang, Jiawei Chen 0002   +3 more
openaire   +1 more source