Steady-State Analysis of Electric Springs With a Novel <i>δ</i> Control

Wang, Qingsong; Cheng, Ming; Chen, Zhe; Wang, Zheng

doi:10.1109/tpel.2015.2391278

Cited by 114 publications

(96 citation statements)

References 16 publications

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“…1, the vector equation of the noncritical load current is given in (1). For simplicity of analysis, the noncritical load is assumed to be resistive, although it is not a necessary condition [14], [20], and [21]. …”

Section: B Multifunctional Operationmentioning

confidence: 99%

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Achieving Multiple Functions of Three-Phase Electric Springs in Unbalanced Three-Phase Power Systems Using the Instantaneous Power Theory

Yan

Wang

Tan

et al. 2018

IEEE Trans. Power Electron.

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Section: B Multifunctional Operationmentioning

confidence: 99%

“…With a response time in the order of milliseconds, electric spring (ES) has recently been introduced as a fast and effective DSM technology to solve various power quality issues including voltage regulation [13], [14], frequency stabilization [15], and power quality improvement [16]. 3-ph ES system and its control are reported in [17].…”

mentioning

confidence: 99%

Achieving Multiple Functions of Three-Phase Electric Springs in Unbalanced Three-Phase Power Systems Using the Instantaneous Power Theory

Yan

Wang

Tan

et al. 2018

IEEE Trans. Power Electron.

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“…Non-isolated ES topologies, when embedded in a power system, have the schematics illustrated in Figure 1a [13], where vREN is the line voltage, Z1 is the line impedance, Z2 is the CL impedance, Z3 is the NCL impedance, and vC and vNC are the voltages across CL and NCL. The magnitude of the line voltage is subjected to changes, especially if the line is fed by power sources like RESs that exhibit uncontrolled variations in their output voltage.…”

Section: Non-isolated Es Topologymentioning

confidence: 99%

“…Switch S cuts off the connection between SL and the inverter. ES control system, including the calculation of angle δ, can be found in [13]; worth to note, this calculation relies on the knowledge of the impedance of transmission line. ES has the circuitry enclosed by the dashed line in Figure 1a and includes a single-phase inverter and a low-pass filter.…”

Section: Non-isolated Es Topologymentioning

confidence: 99%

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Integration of Electric Springs and Multi-Port Transformers—A New Solution for AC Microgrids with Renewable Energy Sources

2017

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Abstract:The new concept of integrating electric springs (ESs) and multi-port transformers (MTPs) as an active solution for energy management in alternating current (AC) microgrids is proposed. With an ES located at the port where storage devices previously were, the so-called critical flux is regulated to a constant value within the core of the transformer. The voltage on each winding is then clamped so that critical load (CL) voltage is regulated to a predefined value. The integration of ESs and MPTs can ensure a safer environment for ES utilization. Thus, the power generated by renewable energy sources can be safely used at residential locations with no need to worry about voltage fluctuations across CLs. Moreover, users can sell electricity to the power companies considered as CLs when the electricity generation of the AC microgrids or the home-installed renewable energy resources exceeds the personal consumption. In the paper, isolated topologies for ESs with three-and four-port transformers are examined, and a theoretical analysis of the ES operation is carried out. Then, equivalent circuits of the isolated ES topologies have been derived. Analysis of the ES operation and effectiveness of the isolated ES topologies are validated by both simulations and experiments.

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An adaptive voltage‐regulation control strategy of an electric spring based on output current feedback

Chen

Wang

et al. 2018

IEEJ Transactions Elec Engng

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With the increasing penetration of distributed generation (DG) in power systems, the voltage instability problem of power systems is receiving a great deal of attention. As new power electronics equipment, an electric spring (ES) can effectively restrain the bus voltage fluctuation caused by DG, and in addition achieve the new control paradigm of load demand following power generation. In this article, an adaptive voltage‐regulation control strategy of ES is proposed, in which the proportional integral (PI) postgain changes dynamically according to the real‐time output current of the ES. The simulation results show that, when the proposed control strategy is applied, bus voltage can still be stabilized effectively by the ES under the condition that noncritical loads change. The proposed control strategy brings the adaptive voltage‐regulation capability of the ES, and therefore, it can be in series with multiple noncritical loads reliably and safely, and accordingly the costs can be greatly reduced. © 2018 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.

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Steady-State Analysis of Electric Springs With a Novel δ Control

Cited by 114 publications

References 16 publications

Achieving Multiple Functions of Three-Phase Electric Springs in Unbalanced Three-Phase Power Systems Using the Instantaneous Power Theory

Achieving Multiple Functions of Three-Phase Electric Springs in Unbalanced Three-Phase Power Systems Using the Instantaneous Power Theory

Integration of Electric Springs and Multi-Port Transformers—A New Solution for AC Microgrids with Renewable Energy Sources

An adaptive voltage‐regulation control strategy of an electric spring based on output current feedback

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