Low-cost ultra-fast DC circuit-breaker: Power electronics integrated with mechanical switchgear

Ängquist, Lennart; Baudoin, Antoine; Norrga, Staffan; Nee, Simon; Modéer, Tomas

doi:10.1109/icit.2018.8352439

Cited by 19 publications

(11 citation statements)

References 6 publications

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“…As shown in Fig. 11 (d), the peak fault current flowing through the thyristor valve S1 is around 6.2 kA and is in the safe operation range of typical high power thyristors [45,46]. It is equivalent to 5.7 pu (6.2 kA/1.09 kA), which is in the similar range to that in [47,48].…”

Section: B DC Faultsmentioning

confidence: 74%

A Unidirectional Hybrid HVDC Transmission System Based on Diode Rectifier and Full-Bridge MMC

2021

IEEE J. Emerg. Sel. Topics Power Electron.

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To reduce the cost of bulk power transmission using voltage source converter HVDC technology, a unidirectional hybrid converter is proposed, where a diode rectifier and a modular multilevel converter (MMC) based on full-bridge (FB) submodules are connected in series on DC side. The FB-MMC controls its DC voltage to regulate the transmitted power. The majority of the power transmission is via the diode rectifier considering its cost and efficiency superiority and only low power rating FB-MMC is required. A thyristor valve is equipped at the DC side of the FB-MMC to prevent potential overcharge of the FB submodules during DC faults. Compared to conventional MMCs, losses can potentially be reduced by around 20%. An active power controller is proposed to regulate the DC voltage of the FB-MMC so as to control the transmitted power. With the inverter station controlling its DC terminal voltage constant, the FB-MMC increases the output DC voltage to increase the transmitted power and, vice versa. To alleviate overvoltage of the HVDC link during AC grid faults of the inverter station, a dynamic DC voltage limiter is designed to actively reduce the DC output voltage of the FB-MMC. Simulation results confirm the proposed converter operation and control. Index Terms-active power control, diode rectifier HVDC (DR-HVDC), fault ride-through, HVDC transmission, full-bridge (FB) based modular multilevel converter (MMC).

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Section: B DC Faultsmentioning

confidence: 74%

A Unidirectional Hybrid HVDC Transmission System Based on Diode Rectifier and Full-Bridge MMC

2021

IEEE J. Emerg. Sel. Topics Power Electron.

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“…The insulation strength (Ub) of the VI depends on the gap distance (s) when s≥5 mm [31]; f and α are parameters depending on the geometry of the coplanar profile, as (9) where f is 30 kV and α is 0.45. The dynamic gap distance (s) can be obtained as (10) from [22].…”

Section: VI Electrical Modelmentioning

confidence: 99%

“…A newly emerging dc CB concept, the voltage-source-converter resonant current (VARC) dc CB, has been proposed in [22] and [23]. The VARC CB utilizes a voltage source converter (VSC) and a series-resonant circuit to effectuate the commutation.…”

mentioning

confidence: 99%

Modeling, Experimental Validation, and Application of VARC HVDC Circuit Breakers

Liu

Popov

Mirhosseini

et al. 2020

IEEE Trans. Power Delivery

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This paper deals with the modelling, hardware results and model validation by measurements of a VSC assisted resonant current (VARC) dc circuit breaker (CB) and the application within a future network by simulation. The newly emerging VARC dc CB can be used as a solution for the protection of offshore multi-terminal HVDC (MTDC) grids. In this paper, the proposed VARC dc CB is modelled in detail in a PSCAD environment, by taking into account dielectric strength of the vacuum gap, high-frequency current quenching ability and parasitic components. The PSCAD-model is then verified by data from the testing of a 27 kV VARC dc CB prototype with maximum current interruption capability of 10 kA. Additionally, the initial transient interruption voltage and current slope at zero-crossing during the interruption are analyzed. With respect to scaling to a higher voltage level, three types of series connected modules are presented and the performances are compared. The performance of the series connected modules is simulated in a model of a 4-terminal HVDC grid. The obtained results validate the VARC dc CB as a promising solution for the dc fault isolation in MTDC grids. Index Terms-HVDC circuit breaker, VARC, PSCAD, circuit breaker performance, HVDC grid, transient analysis. I. INTRODUCTION HE integration of sustainable and renewable technologies is changing the existing transmission system [1]. Significant progress has been made toward the development of Voltage Source Converters (VSCs) in the last few years, which enable meshed HVDC grid to provide a promising This work has received funding from the European Commission under project 691714-PROMOTioN (Progress on Meshed HVDC Offshore Transmission Networks) through Horizon 2020 program."

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“…PEC are used in electromagnetic hammers and rock drills, in devices for driving piles, in rock separators and vibrators, in seismic sources for exploration, in presses with a wide range of impact energies, in vibrating mixers and dispensers for the chemical and biomedical industries, in magnetic pulse devices for shock pressing of ceramics powders, in shock-mechanical devices for cleaning containers from adhesion of bulk materials, in devices for destroying information on digital media, in high-speed electrical devices and valve-switching equipment, in devices for smooth damping and stopping of movable actuators, in test complexes for testing products for shock loads, in catapults of unmanned aerial vehicles, in throwing devices for extinguishing fires, in aerospace and defense systems, etc. [4][5][6][7][8][9].…”

mentioning

confidence: 99%

Excitation of a Pulse Electromechanical Converter of Electrodynamic Type From a Two-Section Capacitor Energy Storage

Bolyukh

2021

Teh. elektrodin.

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A mathematical model of a pulsed electromechanical converter (PEC) of electrodynamic type has been developed, in which the solutions of the equations are presented in a recurrent form, which, when numerically implemented, allows taking into account the interrelated electrical, magnetic, mechanical and thermal processes and their nonlinear parameters. While maintaining the total energy of the pulsed source, the influence of the distribution of energy between the two sections of the capacitive energy storage (CES) and the voltage at which the additional section of the CES is connected was established. When operating in an accelerating mode, the largest amplitude of electrodynamic forces (EDF) and maximum speed occur in the basic version of the PEC, which is excited only from the main section of the CES, and the most effective is the PEC with the smallest capacity of the main section of the CES, and its maximum value is 2.61 higher than for the basic version of the PEC. When operating in the shock-power mode, compared with the basic version of the PEC, the amplitude of the EDF decreases. The most effective is the PEC with the smallest capacity of the main section of the CES, and its maximum value is 5.17 higher than that of the basic version of the PEC. Experimental studies of the PEC in the shock-power mode established that the oscillograms of the voltage of the CES and the current of the PEC correspond to the calculated characteristics, and their main indicators are consistent with each other with an accuracy of 5-7%. References 16, figures 6.

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Low-cost ultra-fast DC circuit-breaker: Power electronics integrated with mechanical switchgear

Cited by 19 publications

References 6 publications

A Unidirectional Hybrid HVDC Transmission System Based on Diode Rectifier and Full-Bridge MMC

A Unidirectional Hybrid HVDC Transmission System Based on Diode Rectifier and Full-Bridge MMC

Modeling, Experimental Validation, and Application of VARC HVDC Circuit Breakers

Excitation of a Pulse Electromechanical Converter of Electrodynamic Type From a Two-Section Capacitor Energy Storage

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