Stable operation of grid connected Cascaded H-Bridge inverter under unbalanced insolation conditions

Eskandari, Abbas; Javadian, Vahid; Iman‐Eini, Hossein; Yadollahi, Milad

doi:10.1109/epecs.2013.6713006

Cited by 33 publications

(20 citation statements)

References 15 publications

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“…The first one is the individual MPPT method introduced in [6], since the control structure is simple and uses conventional PSPWM to produce switching commands. Alongside this [17] is also selected because of its claim on stabilization of the system in heavy mismatching conditions. Fig.…”

Section: Resultsmentioning

confidence: 99%

“…To investigate this matter, the relation between modulation index (S mi ) and solar arrays is required, which has been explored before in [17], and here only the final equation is given: …”

Section: Analysis Of the System Under Heavy Mismatching Conditionmentioning

confidence: 99%

“…However, an uncontrolled amount of reactive power injection (or absorption) may not be desirable from a power dispatcher's point of view. In [17], a novel method is proposed where the control system reduces the power of cells whose modulation index is higher than unity to avoid over-modulation. The technique is capable of stabilizing the system under heavy mismatching condition without reactive power compensation, however, it results in lower output power and a less-efficient system.…”

Section: Introductionmentioning

confidence: 99%

“…In this paper, this modulation is used along with a derivative-of-power-based control method to use CHB cells up to their full potential and to stabilize single-stage cascaded Hbridge inverters in severe mismatching conditions. Power unbalance handling of the proposed technique in an inherent feature and consequently no additional algorithm is needed to check the over-modulation state like what is proposed in [15][16][17]. The paper is organized as follows: the system topology and balancing principles are presented in Section II.…”

Section: Introductionmentioning

confidence: 99%

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Hybrid Modulation Technique for Grid-Connected Cascaded Photovoltaic Systems

Miranbeigi

Iman‐Eini

2016

IEEE Trans. Ind. Electron.

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In this paper, a control method based on the derivative of power is introduced for single-stage singlephase grid-connected cascaded H-bridge (CHB) photovoltaic inverters. The proposed scheme uses solar arrays derivative of power with respect to current to track maximum power point of each array individually. Using this method along with hybrid modulation technique allows utilization of CHB cells up to their full potential. The control system has a simple structure, and is inherently able to stabilize the system in heavy mismatching conditions where the modulation index goes higher than unity. The effectiveness of the proposed technique is verified by simulation and experimental results. Index Terms-Cascaded H-bridge inverters, Derivative of power method, Hybrid modulation, Mismatching handling, Single stage inverters. Mohammadreza Miranbeigi received his B.Sc. and M.Sc. degrees in electrical engineering from the University of Tehran, Tehran, Iran, in 2012 and 2014, respectively. He was with the Power Electronics and Energy Systems (PEES) laboratory at the University of Tehran. His research interests include design, modeling and control of power converters, photovoltaic systems and motor drives. Hossein Iman-Eini (M'10) received his B.S. and M.S. from the University of Tehran, Tehran, Iran, in 2001 and 2003, respectively, and his Ph.D. from both the University of Tehran and the Grenoble Institute of Technology, France, in 2009, all in Electrical Engineering. He is currently an Associate Professor in the School of Electrical and Computer Engineering, University of Tehran. His current research interests include the modeling and control of power converters, multilevel converters and renewable energy systems.

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Section: Resultsmentioning

confidence: 99%

“…To investigate this matter, the relation between modulation index (S mi ) and solar arrays is required, which has been explored before in [17], and here only the final equation is given: …”

Section: Analysis Of the System Under Heavy Mismatching Conditionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Hybrid Modulation Technique for Grid-Connected Cascaded Photovoltaic Systems

Miranbeigi

Iman‐Eini

2016

IEEE Trans. Ind. Electron.

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“…For each phase, the outer loop adjusts the sum of the DC-link voltages v pv,i in accordance with the sum of the references v re f pvi,p provided by the MPPT blocks (these blocks-not shown in the figure-perform a standard Perturb and Observe (P & O) algorithm). Unfortunately, in order to ensure the overall stability of the CHB inverter, the tracking voltage v re f pvi,p should avoid the case that PV generators operate in the flat region of their I-V curve [42]. As a consequence, a lower boundary has to be defined, also ensuring a proper synthesis of AC-side multilevel waveform.…”

Section: Chb Inverter Modelingmentioning

confidence: 99%

Three-Phase PV CHB Inverter for a Distributed Power Generation System

Guerriero¹,

Coppola²,

Napoli³

et al. 2016

Applied Sciences

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This work deals with the design of a three-phase grid-tied photovoltaic (PV) cascade H-bridge inverter for distributed power conversion. The power balancing among the phases must be properly addressed. In fact, an intra-phase power imbalance-arising from uneven irradiance and temperature conditions-generates a per-phase power imbalance. This latter can be compensated by the injection of a proper zero-sequence voltage, while the intra-phase balance is ensured by means of a hybrid modulation method which is able to guarantee the handling of unequal DC (Direct Current) sources, stable circuit operation, and maximization of PV power production. The digital controller is developed and tested in Matlab/Simulink environment integrated with XSG (Xilinx System Generator), thus allowing an easy transfer on a field-programmable gate array (FPGA) platform and accurately describing the behavior of a real hardware implementation. Thus, numerical results have been considered to prove the effectiveness of the proposed approach.

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Harmonic Compensation Strategy for Increasing the Operating Range of Solar-Fed Single-Phase Cascaded H-Bridge Multilevel Inverter

Kumar

Choudhary

2021

Proceedings of Sixth International Congress on Information and Communication Technology

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Stable operation of grid connected Cascaded H-Bridge inverter under unbalanced insolation conditions

Cited by 33 publications

References 15 publications

Hybrid Modulation Technique for Grid-Connected Cascaded Photovoltaic Systems

Hybrid Modulation Technique for Grid-Connected Cascaded Photovoltaic Systems

Three-Phase PV CHB Inverter for a Distributed Power Generation System

Harmonic Compensation Strategy for Increasing the Operating Range of Solar-Fed Single-Phase Cascaded H-Bridge Multilevel Inverter

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