30 kW, 200 V/900 V, Thyristor LCL DC/DC Converter Laboratory Prototype Design and Testing

Hajian, M.; Robinson, J.; Jovcic, Dragan; Wu, Bin

doi:10.1109/tpel.2013.2260564

Cited by 49 publications

(24 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In column interleaved working mode 1 ( Fig. 4(a)), the secondary sides of cells 11 and 21 in group 1 are seriesconnected and the current passes through diodes D 01 , D 10 and D 21 . For group 2, the secondary sides of cells 12 and 22 are series-connected and the current flows in diodes D 01 , D 12 and D 21 .…”

Section: Proposed Scalable Topologymentioning

confidence: 99%

See 1 more Smart Citation

Design of a Modular, High Step-Up Ratio DC–DC Converter for HVDC Applications Integrating Offshore Wind Power

Zeng

Cao

et al. 2016

IEEE Trans. Ind. Electron.

View full text Add to dashboard Cite

Abstract-High power and high voltage gain DC-DC converters are key to high-voltage DC (HVDC) power transmission for offshore wind power. This paper presents an isolated ultra-high step-up DC-DC converter in matrix transformer configuration. A flyback-forward converter is adopted as the power cell and the secondary side matrix connection is introduced to increase the power level and to improve fault tolerance. Because of the modular structure of the converter, the stress on the switching devices is decreased and so is the transformer size. The proposed topology can be operated in column interleaved modes, row interleaved modes and hybrid working modes in order to deal with the varying energy from the wind farm. Furthermore, fault tolerant operation is also realized in several fault scenarios. A 400-W DC-DC converter with four cells is developed and experimentally tested to validate the proposed technique, which can be applied to high-power high-voltage DC power transmission.

show abstract

Section: Proposed Scalable Topologymentioning

confidence: 99%

“…However, their secondary sides can only be connected in series so that their power level is limited. Paper [21] employs thyristors as the switching devices and develops a DC/DC converter for offshore HVDC applications. But the voltage step-up ratio is relatively low.…”

Section: Introductionmentioning

confidence: 99%

Design of a Modular, High Step-Up Ratio DC–DC Converter for HVDC Applications Integrating Offshore Wind Power

Zeng

Cao

et al. 2016

IEEE Trans. Ind. Electron.

View full text Add to dashboard Cite

show abstract

“…Energy storage systems (ESS) with bidirectional DC-DC converters are essential in renewable energy based microgrids, electric vehicles (EVs), transportations, et al [1][2][3][4][5]. Bidirectional DC-DC converters play the role of converting and transferring the electrical energy of the storage elements, which conduct both charge and discharge operation.…”

Section: Introductionmentioning

confidence: 99%

Non-isolated stacked bidirectional soft-switching DC-DC converter with PWM plus phase-shift control scheme

Jiang²,

Yang

et al. 2017

J. Mod. Power Syst. Clean Energy

View full text Add to dashboard Cite

In this paper, a non-isolated stacked bidirectional DC-DC converter with zero-voltage-switching (ZVS) is introduced for the high step-up/step-down conversion systems. The extremely narrow turn-on and/or turn-off duty cycle existing in the conventional bidirectional buck-boost converters can be extended due to the stacked module configuration for large voltage conversion ratio applications. Furthermore, the switch voltage stress is halved because of the series connection of half bridge modules. The PWM plus phase-shift control strategy is employed, where the duty cycle is adopted to regulate the voltages between the input and output sides and the phaseshift angle is applied to achieve the power flow regulation.This decoupled control scheme can not only realize seamless bidirectional transition operation, but also achieve adaptive voltage balance for the power switches. In addition, ZVS soft-switching operation for all active switches is realized to minimize the switching losses. Finally, a prototype of 1 kW operating at 100 kHz is built and tested to demonstrate the effectiveness of the proposed converter and the control strategy.

show abstract

“…Thus, the dc solid-state transformer appears the only approach to connect and interconnect existing HVDC links with different dc voltages. These transformers are available in different configurations which include the thyristor based solid-state transformer [10],the dual-active bridge (DAB) transformer [11], and the MMC based transformer [12]. Due to extremely low switching losses and improved harmonic characteristics, the MMC based dc solid-state transformer is an attractive approach, hence it is considered in this paper.…”

Section: Introductionmentioning

confidence: 99%

Mechanism to Regulate DC Fault Currents in DC Solid State Transformers under Continuous Working Performance of Multi-Terminal HVDC Systems

Chiranth¹

2017

IJRASET

View full text Add to dashboard Cite

Once the pole-to-pole dc fault occurs in a multi-terminal HVDC system, it is desirable that the stations and dc solidstate transformers on healthy cables continue to operate, rather than blocking. To reduce the fault current of a modular multilevel converter based dc solid-state transformer, active fault current control is proposed, where the dc and ac components of fault arm currents are controlled independently. By dynamically regulating the dc offset of the arm voltage rather than being set at half the rated dc voltage, the dc component in the fault current is reduced significantly. Additionally, reduced ac voltage operation of the dc solid-state transformer during the fault is proposed, where the ac voltage of transformer is actively restricted in the controllable range of both converters in the transformer to effectively suppress the ac component of the fault current. The fault arm current peak and the energy absorbed by the surge arrester in the dc circuit breakers are reduced by 31.8% and 4.9% respectively, thereby lowering the capacities of switching devices and circuit breakers. The novel active fault current control mechanism and the essential control strategy are presented and simulation results confirm its feasibility. I. INTRODUCTIONThe deregulation of international energy markets and the trend to decentralized power generation are increasing the demand for advanced power electronic systems. For this application field multilevel converters with a high number of voltage levels seem to be the most suitable types, MMC was first proposed for HVDC applications at 2003from a Marquardt and it is first employed commercially in Trans Bay Cable project in a San Francisco. In the present scenario the Modular Multi-Level Converter (MMC) is becoming the most common type of a voltage source converter for HVDC applications. DC fault protection is an issue to be resolved for the development of modular multilevel converter (MMC) based HVDC transmission systems. [1][2][3][4]. The dc circuit breakers (DCCBs) have the potential to isolate a dc fault and protect stations from damage and limiting reactors are series connected with the fast acting DCCBs (e.g. solid-state DCCBs, hybrid DCCBs) to limit the fault current di/dt and decrease the fault current peak. Recently, the concept of the dc solid-state transformer (DCT) has been proposed which uses active controlled power electronic components to optimize converter performance. [6][7][8][9]. Similar to the ac transformer, the dc solid-state transformer can adapt the dc voltage to any higher or lower voltage level. By blocking all the converters of the dc solid-state transformer, dc faults can be isolated without significantly affecting the healthy system parts. Thus, the dc solid-state transformer appears the only approach to connect and interconnect existing HVDC links with different dc voltages. These transformers are available in different configurations which include the thyristor based solid-state transformer[10],the dual-active bridge (DAB) transformer [1...

show abstract

30 kW, 200 V/900 V, Thyristor LCL DC/DC Converter Laboratory Prototype Design and Testing

Cited by 49 publications

References 9 publications

Design of a Modular, High Step-Up Ratio DC–DC Converter for HVDC Applications Integrating Offshore Wind Power

Design of a Modular, High Step-Up Ratio DC–DC Converter for HVDC Applications Integrating Offshore Wind Power

Non-isolated stacked bidirectional soft-switching DC-DC converter with PWM plus phase-shift control scheme

Mechanism to Regulate DC Fault Currents in DC Solid State Transformers under Continuous Working Performance of Multi-Terminal HVDC Systems

Contact Info

Product

Resources

About