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Parameters Design of Pre-synchronization for Multiple Virtual Synchronous Generator Based Microgrid
2019 IEEE Applied Power Electronics Conference and Exposition (APEC), 2019A pre-synchronization method for microgrids based on virtual synchronous generators has been presented to reduce inrush current and achieve seamless transition from islanded mode to grid-connected mode. And pre-synchronization units that consist of a frequency regulator, a voltage magnitude regulator and a phase regulator is added to each inverters in ...
Fang Zhuo +2 more
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Pre-Synchronization Control Strategy for Grid Connection of Synchronverter Cluster
2021 IEEE 4th International Electrical and Energy Conference (CIEEC), 2021It is found that large inrush currents and power oscillations occur when a synchronverter cluster is connected to the utility grid. In this paper, we propose a pre-synchronization control strategy to minimize the inrush current and suppress the power oscillation in the grid-tied synchronverters.
Yingjie Tan, Xia Shen, Min Xu
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Synchronization Process and a Pre-synchronization Method of the Virtual Synchronous Generator
2020 4th International Conference on HVDC (HVDC), 2020Virtual synchronous generator (VSG) is the concept of controlling the grid-connected inverters to mimic conventional synchronous generators (SGs), and it is considered to be a promising method to enhance the grid inertia and power regulation ability when the renewable energy has a high penetration rate in the grid.
Weiqiang Zhan +5 more
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Memory Pre-synchronization Technology for Application Migration
2012 IEEE 12th International Conference on Computer and Information Technology, 2012The rapid development of internet technology and mobile communication technology has brought significant changes to the way in which people retrieve information and experience application service. We believe that application migration can perfectly solve these problems, if the continuity of application service experience and efficiency of migration ...
Tang Haofu +4 more
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2016 Annual Conference on Information Science and Systems (CISS), 2016
We describe the key ideas behind our implementation of a distributed antenna array fully pre-synchronized for retrodirective transmission to an external receiver. In our implementation, a number of wireless transceivers in a network use a sequence of simple in-band wireless message exchanges to calibrate themselves so that these transceivers can obtain
Benjamin Peiffer +4 more
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We describe the key ideas behind our implementation of a distributed antenna array fully pre-synchronized for retrodirective transmission to an external receiver. In our implementation, a number of wireless transceivers in a network use a sequence of simple in-band wireless message exchanges to calibrate themselves so that these transceivers can obtain
Benjamin Peiffer +4 more
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Combined Pre-Synchronization and Power Sharing Control for Microgrid Applications
2020 55th International Universities Power Engineering Conference (UPEC), 2020With the increased penetration of distributed generation in the power distribution systems, it becomes a requirement for microgrids to switch between islanding and grid-connected operation modes. When the line impedance of each micro-source in the microgrid is different, this will cause a mismatch in the output power of the micro-sources.
Li Lei +3 more
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A Pre-synchronization Method for Grid-connection Based on Virtual Synchronous Generator
2019 6th International Conference on Systems and Informatics (ICSAI), 2019The inverter is simulated as a synchronous generator that is friendly to large power grid, which can improve the absorption capacity of distributed power supply. However, when virtual synchronous generator (VSG) is connected to the grid, there will be a large current shock. Therefore, this paper proposes an improved pre-synchronization control strategy
Wenqiao Tang, Jun Liu
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Convergence Property of Transmit Time Pre-Synchronization for Concurrent Cooperative Communication
2010 IEEE Global Telecommunications Conference GLOBECOM 2010, 2010This paper proposes a preamble detection-based cooperative transmit time pre-synchronization technique specially for Concurrent Cooperative Transmission (CCT). CCT enables a collection of power-constrained radios to transmit as a group and achieve a transmit range that is much greater than the range of a single device. In the absence of a GPS system or
Yong Jun Chang, Mary Ann Ingram
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Research on Pre-Synchronization Control Strategy for Microgrid VSG Inverter
2019 14th IEEE Conference on Industrial Electronics and Applications (ICIEA), 2019In the microgrid, the virtual synchronous generator (VSG) technology realizes the friendly access of the distributed power supply and improves the stability of the power system by simulating the operating mechanism of the synchronous generator (SG). However, the VSG inverter has a large impact current at the moment when it is switching from off-grid to
Mengxiang Zhang +5 more
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A Pre-synchronization Strategy for Grid-forming Virtual Oscillator Controlled Inverters
2020 IEEE Energy Conversion Congress and Exposition (ECCE), 2020Voltage controlled inverters in ac systems are susceptible to damage if the controller is not properly initialized before startup. Since currents are not controlled explicitly, the voltage reference of the controller must be closely aligned with the point of common coupling voltage to prevent large current transients when power delivery begins. In this
Minghui Lu +4 more
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