Voltage and Power Balance Control for a Cascaded H-Bridge Converter-Based Solid-State Transformer

Zhao, Tiefu; Wang, Gangyao; Bhattacharya, Subhashish; Huang, Alex Q.

doi:10.1109/tpel.2012.2216549

Cited by 548 publications

(206 citation statements)

References 16 publications

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“…Several control strategies have been discussed in literature [4], [9]- [11]. The CHB rectifier connected to QAB is shown in Fig.…”

Section: A Control Of Chbmentioning

confidence: 99%

“…Assuming the rectifier is operated without over-modulation, the maximum power delivered by each cell is given as [4]:…”

Section: A Control Of Chbmentioning

confidence: 99%

“…The main challenge in control of CHB is the dc-link capacitor balancing. In literature, strategies to balance the capacitor voltages for unequal loads have been studied [4], [5]. But the goal of this paper is to identify the best suitable voltage balancing scheme for the intentional unequal power sharing and to identify the power unbalance limits.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Comparison of voltage control methods of CHB converters for power routing in smart transformer

Raveendran

Buticchi

Mercante³

2017

2017 IEEE Energy Conversion Congress and Exposition (ECCE)

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Abstract-For Smart Transformers (ST), reliability is one of the major problems when compared to the traditional lowfrequency transformers. Modular ST with advanced control algorithms could increase the reliability compared to the nonmodular solutions. This could be achieved by distributing differently the power among the cells depending on their aging. This unequal power transfer is a challenge for Cascaded HBridge converters (CHB). ST based on a CHB rectifier with different capacitor voltage balancing schemes are analyzed in the paper. The goal is to evaluate the best scheme for unequal power transfer while maintaining the dc-link voltages constant. The paper focuses on validating the operating power unbalance limits of each cell of the modular system for unbalanced power transfer while maintaining the voltage balance in the medium voltage dc-link stage. The power unbalance limits are established with analytical calculations and verified through simulations and experiments.

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“…Several control strategies have been discussed in literature [4], [9]- [11]. The CHB rectifier connected to QAB is shown in Fig.…”

Section: A Control Of Chbmentioning

confidence: 99%

“…Assuming the rectifier is operated without over-modulation, the maximum power delivered by each cell is given as [4]:…”

Section: A Control Of Chbmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Comparison of voltage control methods of CHB converters for power routing in smart transformer

Raveendran

Buticchi

Mercante³

2017

2017 IEEE Energy Conversion Congress and Exposition (ECCE)

View full text Add to dashboard Cite

show abstract

“…For DC-DC converter we will use MPPT control technique for stabilizingDC [8] voltage and for Multilevel inverter we will use any of the PWM control techniques along with PI controller etc. By using this methods we can't achieve Reactive power compensation and design of PV system wise also some problems are there like leakage current etc [9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Active & Reactive power Control of Large scale Grid Connected PV system by Cascaded Modular Multi-Level Inverters withFuzzy Logic Control Approach

2017

IJMTER

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Abstract-Due to its advantages like clean energy production and more abundance availability solar energy is the most concentrated topic from last 20 years. Grid connected PV system gaining its importance due to high demand of power across the globe. Now a days different topologies of Multilevel Inverters are developing. By using this multilevel inverters we can interface the PV systems with Grid easily and effectively. But PV system facing so many problems like power flow control and output voltage disturbances because PV systems produce irregular output voltages. This paper demonstrates the Cascade Multilevel inverter with Active and Reactive power control using Fuzzy logic control approach of for Grid Connected PV System. With the help of this model we can improve the performance of the total PV system. In this paper we proposed a 3-MW, 12-kV PV system with the Fuzzy Logic control strategy is modelled and simulated in MATLAB.

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“…Several modular isolated bidirectional dc-dc converters have been reported in the literature [3][4][5][6][7][8][9][10][11]. Most of them have been designed for a specific application and some of them have focused on developing control techniques to achieve equal input voltage and output current sharing and improve the dynamic performance.…”

Section: Introductionmentioning

confidence: 99%

Dynamic analysis of a modular isolated bidirectional dc-dc converter for high power applications

Sedaghati¹,

Hosseini

Sabahi³

et al. 2016

Turk J Elec Eng & Comp Sci

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Abstract:A new configuration for modular isolated bidirectional dc-dc converters is presented. The proposed converter has interesting features such as fewer switching devices, bidirectional power flow, and low switching losses. The simple modular structure, high frequency operation, zero voltage switching (ZVS) capability, and fewer switching devices make the extended configuration of the proposed converter suitable for high power applications. The operation principle of the proposed converter is analyzed in steady state, and then ZVS analysis of the converter is presented in detail. A generalized averaging technique, which uses dc and first order terms of Fourier's series of state variables, is applied to model the converter. A small-signal average model is developed to obtain the control-to-output transfer function of the converter. In order to obtain acceptable dynamic response, closed-loop control of the converter using a PID controller is studied. Finally, measurement and simulation results are presented to verify the operation principles of the converter and effectiveness of the PID controller.

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Voltage and Power Balance Control for a Cascaded H-Bridge Converter-Based Solid-State Transformer

Cited by 548 publications

References 16 publications

Comparison of voltage control methods of CHB converters for power routing in smart transformer

Comparison of voltage control methods of CHB converters for power routing in smart transformer

Active & Reactive power Control of Large scale Grid Connected PV system by Cascaded Modular Multi-Level Inverters withFuzzy Logic Control Approach

Dynamic analysis of a modular isolated bidirectional dc-dc converter for high power applications

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