Power Balance Optimization of Cascaded H-Bridge Multilevel Converters for Large-Scale Photovoltaic Integration

Yu, Yifan; Konstantinou, Georgios; Hredzak, Branislav; Agelidis, Vassilios G.

doi:10.1109/tpel.2015.2407884

Cited by 162 publications

(94 citation statements)

References 20 publications

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“…assuring fast dynamics and zero steady-state error. Even though effective approaches which concern optimal control strategies of power balancing have been proposed in recent literature [35][36][37], the adopted choice reaches the goal of proving the compatibility of the proposed modulation strategy with traditional and commonly adopted control techniques. The paper is organized as follows: in Section 2, the proposed circuit topology is described and the mathematical model for controlling its operation is presented; in Section 3, the control strategy, along with the proposed CHB inverter implemented in Matlab/Simulink ® are shown, and numerical results are discussed to verify the effectiveness of the proposed approach in static and dynamic conditions, even under partial shading.…”

Section: System Topology and Control Strategymentioning

confidence: 99%

“…This latter ensures that d and q components are almost fully decoupled, while allowing a simple implementation and assuring fast dynamics and zero steady-state error. Even though effective approaches which concern optimal control strategies of power balancing have been proposed in recent literature [35][36][37], the adopted choice reaches the goal of proving the compatibility of the proposed modulation strategy with traditional and commonly adopted control techniques.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: System Topology and Control Strategymentioning

confidence: 99%

Section: Introductionmentioning

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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“…It is important to emphasize that (25) is not the only viable option to obtain v 0 . Any zero-sequence reference that guarantees inter-phase power balance can be applied along with the proposed predictive controller; see, e.g., [8]- [10].…”

Section: Unbalanced Power Source Referencementioning

confidence: 99%

“…To address this issue, several control strategies have been proposed to govern CHB converters under unequal power generation among phases [8]- [10]. In this case, the control goal is to achieve an inter-phase power balance in the gridside under a certain range of power imbalance in the dc-power source.…”

Section: Introductionmentioning

confidence: 99%

Predictive Control algorithm to achieve power balance of Cascaded H-Bridge converters

Aguilera

Acuna

et al. 2015

2015 IEEE International Symposium on Predictive Control of Electrical Drives and Power Electronics (PRECEDE)

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This work proposes a Model Predictive Control (MPC) strategy for Cascaded H-Bridge (CHB) converters under unbalanced power generation among each converter phase. Therefore, the control target is to extract unbalanced power from the dc-sources while providing balanced power to the grid.The key novelty of this proposal lies in the way the unbalanced power generation issue is explicitly considered into the optimal control problem. The power balance is achieved by enforcing the CHB to work with a suitable zero voltage components. Thus, to account for the common-mode voltage, the proposed MPC is directly formulated in the original abc-framework . To verify the effectiveness of this proposal, simulation results of the proposed MPC governing a five-level CHB converter are provided.

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“…With the increasing energy crisis and environmental problems, renewable energy generation, mostly in power plants or microgrids, have grown rapidly [1][2][3]. Due to the distributed locations of renewable energy generators, multiple transformers and long transmission lines are utilized to connect the systems to the public grid [4].…”

Section: Introductionmentioning

confidence: 99%

Oscillation Suppression Method by Two Notch Filters for Parallel Inverters under Weak Grid Conditions

et al. 2018

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With plenty of parallel inverters connected to a weak grid at the point of common coupling (PCC), the impedance coupling interactions between the inverters and the grid are enhanced, which may cause high-frequency harmonic oscillation and further aggravate the system instability. In this paper, a basic technique for inverter output impedance is proposed to suppress the oscillation, showing that the inverter output impedance should be designed relatively high at the harmonic oscillation frequency, while relatively low at other frequencies. On the basis of the proposed technique, two virtual impedances are added to be in parallel and in series with the original inverter output impedance, respectively. Thus, an oscillation suppression method by two notch filters is proposed to realize the virtual impedances and increase the whole system damping. The implementation forms of the virtual impedances are presented by the proposed PCC voltage feedforward and grid-side inductor current feedback with two notch filters. Finally, simulation and experimental results are provided to verify the validity of the proposed control method.

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Power Balance Optimization of Cascaded H-Bridge Multilevel Converters for Large-Scale Photovoltaic Integration

Cited by 162 publications

References 20 publications

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

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

Predictive Control algorithm to achieve power balance of Cascaded H-Bridge converters

Oscillation Suppression Method by Two Notch Filters for Parallel Inverters under Weak Grid Conditions

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