A Current Limiting Strategy With Parallel Virtual Impedance for Three-Phase Three-Leg Inverter Under Asymmetrical Short-Circuit Fault to Improve the Controllable Capability of Fault Currents

Lin, Xinchun; Liang, Zhen; Zheng, Yanfang; Lin, Yibin; Kang, Yong

doi:10.1109/tpel.2018.2879191

Cited by 41 publications

(32 citation statements)

References 28 publications

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“…The control structure proposed in [279] reduces power oscillations using the quasi-Newton-trust region method. VU limiting is achieved by paralleling VI in [280] while Shuai et al [281] investigated the fault current characteristics. Enhanced controls under unbalances have been presented in [282] to suppress power oscillations, in [283] for the AC/DC matrix converters, in [284] to control the unbalanced fault current, in [285] for power oscillation suppression, and in [286] to improve the power quality and stability aspects.…”

Section: Unbalance Mitigation In the Grid-connected Modementioning

confidence: 99%

“…5 shows a typical control scheme for the grid‐connected mode involving a secondary communication‐based layer. This section summarises the available literature [14, 15, 16, 17, 20, 24, 26, 162, 219, 226–366] on unbalance mitigation in the grid‐connected scenario of both single and multiple inverters.…”

Section: Unbalance Mitigation In the Grid‐connected Modementioning

confidence: 99%

“…The control structure proposed in [279] reduces power oscillations using the quasi‐Newton‐trust region method. VU limiting is achieved by paralleling VI in [280] while Shuai et al . [281] investigated the fault current characteristics.…”

Section: Unbalance Mitigation In the Grid‐connected Modementioning

confidence: 99%

See 2 more Smart Citations

Unbalance mitigation strategies in microgrids

Vijay

Doolla

Chandorkar

2020

IET Power Electronics

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Unbalance or asymmetry in the distribution network is a well-known power quality issue. In the modern active distribution system, with the increasing penetration of renewables, this phenomenon becomes more pronounced. In the context of microgrids (MGs), several works have been proposed for the management and mitigation of the unbalance, for both the sharing of unbalanced load and maintaining the voltage quality in the islanded mode and for the control of distributed generators in the grid-connected mode during unbalanced conditions. This study comprehensively reviews, summarises, and classifies the various strategies of the unbalance mitigation techniques for the islanded and grid-connected modes of operation for threephase MGs and presents the possible challenges and avenues for future investigations on the topic.

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Section: Unbalance Mitigation In the Grid-connected Modementioning

confidence: 99%

Section: Unbalance Mitigation In the Grid‐connected Modementioning

confidence: 99%

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Unbalance mitigation strategies in microgrids

Vijay

Doolla

Chandorkar

2020

IET Power Electronics

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“…Most of the state-of-the-art software-based overcurrent protection schemes are based on either altering the controller structure [23], [30]- [33] or using cascade controllers with dynamic states in the inner current loop, e.g., an integrator or a resonator [25]- [29]. Altering the controller structure during operation requires careful maintenance of the dynamic states in the control loops, as improperly set dynamic states can have an adverse effect on the transient response following a change in the controller structure [34].…”

Section: Introductionmentioning

confidence: 99%

Multifunctional Cascade Control of Voltage-Source Converters Equipped With an LC Filter

Pirsto

Kukkola

Hinkkanen

2022

IEEE Trans. Ind. Electron.

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This paper proposes a multifunctional cascade controller structure for voltage-source converters. The proposed structure contains a decoupling loop between the outer voltage control loop and the inner current control loop, and operation in either voltage or current control mode is possible. In voltage control mode, the current controller can be made completely transparent. In the case of faults, the proposed structure enables inherent overcurrent protection by a seamless transition from voltage to current control mode, wherein the current controller is fully operational. Seamless transitions between the control modes can also be triggered with an external signal to adapt the converter to different operating conditions. The proposed structure allows for integration of simple, accurate, and flexible overcurrent protection to state-of-the-art singleloop voltage controllers without affecting voltage control properties under normal operation. The properties of the proposed controller structure are validated experimentally on a 10-kVA converter system.

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“…It is therefore of great importance to locate faults and minimize their adverse impacts. To realize this target, a number of fault-diagnosis and fault-tolerant operation schemes have been proposed in the existing literature [5]- [8]. Among them, one common pursuit is to confine the fault within the local area so that the adverse impact on the rest of system can be minimized.…”

Section: Introductionmentioning

confidence: 99%

Fault-tolerant Distribution Network Enabled by Series Soft Open Point

Yang¹

2021

Preprint

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Reliability enhancement is always considered as the top priority of the power distribution network. It is highly expected that the power network faults can be locally addressed without spreading into the entire grid. To fulfill the requirement, this paper develops a smart power-electronics device named series soft open point (SSOP). The proposed SSOP connects two AC terminals and can suppress the surge current caused by a short-circuit fault. In addition, it also performs the grid-forming function during an islanding fault. The principle of SSOP will be elaborated and the effectiveness of this proposal is validated by experimental results.

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A Current Limiting Strategy With Parallel Virtual Impedance for Three-Phase Three-Leg Inverter Under Asymmetrical Short-Circuit Fault to Improve the Controllable Capability of Fault Currents

Cited by 41 publications

References 28 publications

Unbalance mitigation strategies in microgrids

Unbalance mitigation strategies in microgrids

Multifunctional Cascade Control of Voltage-Source Converters Equipped With an LC Filter

Fault-tolerant Distribution Network Enabled by Series Soft Open Point

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