Research on Resonance Mechanism and Suppression Technology of Photovoltaic Cluster Inverter

Wan, Qing; Zhang, Hongfan

doi:10.3390/en11040938

Cited by 5 publications

(3 citation statements)

References 14 publications

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“…In addition, manufacturers offer significantly higher power of modules of a cluster, actually on an industrial scale, in opposite to the system proposed in the article. In next time, will need research for safety connection to the power grid to ensure the reliability of power supply [17]. This article is made in accordance with the scientific program 6541230 -"Energogarant".…”

Section: Fig 4 Unit Based On Microinvertersmentioning

confidence: 99%

Комплект Енергетичного Модуля Як Елемента Фотоелектричного Кластера

Бондаренко,

Матях,

Суржик

et al. 2023

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Оскільки сонячні генерувальні потужності можуть бути сегментовані, то є перспективним перехід до побудови генерувальних електричних станцій у вигляді кластерної структури та створення уніфікованих генерувальних модулів. Також треба зазначити, що багато домогосподарств та невеликих підприємств переходять на використання локальних, невеликих за потужністю сонячних електростанцій для власних потреб. Такі генерувальні міністанції є досить типовими та містять типові за призначенням та номінальними параметрами елементи. Таким чином, пропонується створити й у подальшому застосовувати типові універсальні мініелектростанції, які є модулями для побудови електрогенерувальних мінікластерів. У статті показана повна деталізація запропонованого модуля.

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Section: Fig 4 Unit Based On Microinvertersmentioning

confidence: 99%

Комплект Енергетичного Модуля Як Елемента Фотоелектричного Кластера

Бондаренко,

Матях,

Суржик

et al. 2023

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“…Taking the first three grid-connected inverters in Figure 1 as a cluster, the mechanism of cluster resonance is analyzed. The resistance element in the weak current network can increase the damping of the system and improve the stability of the system [5]. To verify the suppression ability of the proposed control method under the most severe system resonance, it is assumed that the weak current network is purely inductive, that is, the impedance only contains L g .…”

Section: Resonance Mechanism Analysismentioning

confidence: 99%

Grid-Connected Resonance Suppression Of Group-Series Photovoltaic Cluster Inverters Based On Hybrid Damping

Wang

2021

J. Phys.: Conf. Ser.

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Grid-connected group-series photovoltaic cluster inverter system will cause resonance, which will adversely affect the system. To suppress grid-connected resonance, the mathematical model, resonance mechanism and resonance characteristics of the cluster inverters are analyzed, and a global resonance suppression strategy based on hybrid damping is proposed. In the current loop of the inverter, capacitive current feedback and parallel voltage proportional feed-forward are introduced as active dampers to reduce the harmonics of the parallel current. On this basis, RLC type second-order resonance suppression circuit is added as passive damping to suppress system resonance, so that the output current of the inverters can meet the grid-connected conditions when the cluster is connected to the grid. The simulation and experimental results show that the total harmonic distortion of the grid-connected current decreases from 10.54% to 1.97% after three series photovoltaic cluster inverters adopt this strategy, which effectively suppresses the grid-connected resonance.

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“…From the global point of view, the centralized resonance suppression method can effectively suppress the occurrence of harmonic resonance by reasonably designing the damping circuit at the point of common coupling (PCC). To suppress the resonance of the multi-inverter system, a method of parallel RC branches at PCC is implemented in Wan et al (2018). That passive suppression circuit is simple in design, but the problem of power loss is serious.…”

Section: Introductionmentioning

confidence: 99%

Research on the Resonance Suppression Method for Parallel Grid-Connected Inverters Based on Active Impedance

Zhao

Cao²,

Zhang³

et al. 2022

Front. Energy Res.

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Under the condition of weak grid, the coupling between parallel inverters and grid impedance is easy to cause harmonic resonance, which seriously affects the grid-connected power quality. First, the equivalent circuit model of the multi-inverter parallel system is established, and the mechanism of harmonic resonance is analyzed from the perspective of impedance; through the resonance detection method based on a self-tuning filter, the voltage resonance component of the parallel node is extracted; on that basis, an active impedance is designed to suppress the resonance of the multi-inverter parallel system, which can equivalently construct a virtual impedance branch to improve the grid impedance characteristics at the resonance frequency, and its effectiveness is verified using the impedance stability criterion. Finally, simulation experiments are carried out. The results show that this method can effectively suppress the resonance of the multi-inverter parallel system and can significantly improve the adaptability of inverters to weak grid.

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Research on Resonance Mechanism and Suppression Technology of Photovoltaic Cluster Inverter

Cited by 5 publications

References 14 publications

Комплект Енергетичного Модуля Як Елемента Фотоелектричного Кластера

Комплект Енергетичного Модуля Як Елемента Фотоелектричного Кластера

Grid-Connected Resonance Suppression Of Group-Series Photovoltaic Cluster Inverters Based On Hybrid Damping

Research on the Resonance Suppression Method for Parallel Grid-Connected Inverters Based on Active Impedance

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