Improved control strategies for three-phase four-leg virtual synchronous generator with unbalanced loads

Wang, Jianhua; Luo, Fang; Gu, Binshi; Ji, Zhendong; Lv, Zhipeng; Wang, Tao

doi:10.23919/epe17ecceeurope.2017.8099135

Cited by 5 publications

(2 citation statements)

References 9 publications

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“…Unbalance and harmonic controllers are used in [189], while strategies in [190][191][192] use communication to achieve unbalance compensation. An adaptive resonant control method for variable frequency for a VSG is discussed in [193], while Samadhiya and Namrata [194] discussed an energy management strategy and a VC strategy for the cascaded H-bridge (CHB) multilevel inverter-based DG source to mitigate unbalance. A distributed MPC based on augmented Lagrangian relaxation and auxiliary problem principle is proposed for the control of unbalance in [195].…”

Section: Fig 4 Block Diagram Of a Typical Control Scheme For Addressmentioning

confidence: 99%

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: Fig 4 Block Diagram Of a Typical Control Scheme For Addressmentioning

confidence: 99%

Unbalance mitigation strategies in microgrids

Vijay

Doolla

Chandorkar

2020

IET Power Electronics

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“…The uncontrollable coupling affects the accuracy of the power regulation, resulting in large power circulating current and power fluctuations of the microgrid. Therefore, these drawbacks decrease the dynamic performance, steady-state performance, and accuracy of the power sharing of the microgrid [14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Virtual synchronous generator control strategy incorporating improved governor control and coupling compensation for AC microgrid

Peng

Wang

Wen

et al. 2019

IET Power Electronics

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Virtual synchronous generator (VSG) control strategy has been widely used in the AC microgrid in recent years. However, the VSG control strategy is lack of the decoupling ability, and its governor control is also lack of the inertia block and speed controller block, resulting in poor dynamic performance, steady-state performance, and low accuracy of the power sharing of the AC microgrid. In this study, a novel VSG control strategy incorporating improved governor control and coupling compensation is proposed to improve the performance of the AC microgrid. Its improved governor control comprises the speed controller and inertia, which can enhance the inertia of the angular frequency and decrease the difference of the governor control between the novel VSG control strategy and diesel generator. Its coupling compensation comprises the angular frequency deviation compensation and voltage deviation compensation, which can reduce the influence of the uncontrollable coupling on the power regulation and increase the degree of freedom of the power regulation. Experimental results validate the effectiveness of the proposed VSG control strategy.

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