Output impedance design of parallel-connected UPS inverters with wireless load-sharing control

By Josep M. Guerrero, Luis García de Vicuña, José Matas, Miguel Castilla, Jaume Tomas Miret. IEEE transactions on industrial electronics (1982. Print), 2005

1,201 citations recorded by the source corpus.

Subfields: Control and Systems Engineering, Electrical and Electronic Engineering

View Paper: https://www.semanticscholar.org/paper/6bc7e4729fac9f58a38366f1dcbfe0012f491c3b

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Citations in the corpus

Synchronization and power sharing for droop-controlled inverters in islanded microgrids (2012, neutral): “∗ In some applications the inverter output impedance can be controlled to be highly inductive and dominate over any resistive effects in the network [16].”
Small-Signal Modeling and Parameters Design for Virtual Synchronous Generators (2016, background): “If not, a virtual inductor can be introduced to be in series with it through the control strategy, and thus making the impedance to be inductive [21].”
Shunt Active-Power-Filter Topology Based on Parallel Interleaved Inverters (2008, background): “This section gives different design procedures and investigates how low the line inductors can be selected [19].”
Hierarchical Structure of Microgrids Control System (2012, methodology): “where is the cutoff frequency of the high-pass filter [41].”
Hierarchical Control of Droop-Controlled AC and DC Microgrids—A General Approach Toward Standardization (2009, background): “Usually, ZD is designed to be bigger than Zo; in this way, the total equivalent output impedance is mainly dominated by ZD [17].”
A Review on Microgrids’ Challenges & Perspectives (2021, neutral): “In a high reactance distribution feeder, the drawn power at the bus with PQ Droop inverter control based is presented as [57]–[59]: where, And, ϕ is the phase difference between bus and inverter voltage.”
Advanced Control Architectures for Intelligent Microgrids—Part I: Decentralized and Hierarchical Control (2013, methodology): “Furthermore, the virtual output impedance can provide additional features to the inverter, such as hot-swap operation and harmonic current sharing [17], [18].”
Distributed Control Techniques in Microgrids (2014, methodology): “Some of the well-known approaches include virtual output impedance method to compensate voltage imbalance and decrease sensitivity to system parameters [24], adaptive droop method to improve transient performance [25], nonlinear load sharing in the presence”
Control Strategy for Flexible Microgrid Based on Parallel Line-Interactive UPS Systems (2009, methodology): “The virtual output impedance loop is able to fix the output impedance of the inverter by subtracting a processed portion of the output current io to the voltage reference of the inverter Vref [13].”
Secondary Frequency and Voltage Control of Islanded Microgrids via Distributed Averaging (2015, background): “This is achieved via an inner control loop for the current, an outer control loop for the voltage, and a virtual impedance loop ensuring the output impedance is desirable at the line frequency (lower half of Figure 7) [3], [20].”
Control of Distributed Uninterruptible Power Supply Systems (2008, methodology): “The implementation of the virtual output impedance can by done by using the following expression [66]:”
Wireless-control strategy for parallel operation of distributed generation inverters (2006, background): “Therefore, taking into account that Q is reduced when X increases, we propose the following adaptive output impedance in order to regulate the Q balance [ 28 ]”
Grid Forming Inverter Modeling, Control, and Applications (2021, methodology): “As an alternative approach, a virtual impedancebased approach is proposed in [25] for droop-controlled inverters operating with a complex system impedance.”
Decentralized control for parallel operation of distributed generation inverters using resistive output impedance (2007, background): “The output impedance of the closed-loop inverter affects the power-sharing accuracy and also determines the droopcontrol strategy [13].”
Trends in Microgrid Control (2014, background): “inaccuracy and active/reactive power coupling in distribution networks, the control loop is augmented with a virtual inductive output impedance in [79], [84], [85].”
Robust Droop Controller for Accurate Proportional Load Sharing Among Inverters Operated in Parallel (2013, background): “However, in low-voltage applications, the line impedance is predominantly resistive.”