Design Procedure and Control of a Hybrid Circuit Breaker with Adaptable Pulse Current Injection

Jehle, Andreas; Biela, J.

doi:10.23919/ipec.2018.8507727

Cited by 3 publications

(2 citation statements)

References 19 publications

(15 reference statements)

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“…2. The current-injection branch consisting of a precharged capacitor C CI with initial capacitor voltage V CI (t 0 ) = V C0 [3,7,8], a switch S CI (e.g. a thyristor) and an inductance L CI .…”

Section: Current Injection Branchmentioning

confidence: 99%

Impact of the Initial Transient Interruption Voltage (ITIV) on the Design and Operation of Hybrid Current-Injection DC Circuit Breakers

Jehle

Biela

2020

2020 22nd European Conference on Power Electronics and Applications (EPE'20 ECCE Europe)

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In hybrid DC circuit breakers with current-injection, the arc in the mechanical switch is extinguished with a current pulse. After the arc extinction, the voltage increase across the mechanical switch must be limited in order to avoid an arc reignition. The voltage across the MS is usually assumed to be equal to the voltage across the capacitor C CI in the current-injection circuit, which increases slowly due to slow charging of the capacitor by the fault current. However, in reality the voltage across capacitor C CI is usually not zero at the point in time of the arc extinction. This results in high transient voltages across the mechanical switch, the so called so-called initial transient interruption voltage (ITIV) after the arc extinguishes. However, a fast increasing ITIV can lead to a thermal reignition of the arc. Therefore, it is crucial for the design of a DC-CB to understand, which effects contribute to a high ITIV. In this paper, these causes and the influence of the ITIV are investigated. Furthermore, the beneficial influence of grading capacitors parallel to the MS is investigated. Finally, an optimization of a DC-CB including the ITIV and its results are presented for a typical implementation of a current-injection DC-CB.

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Section: Current Injection Branchmentioning

confidence: 99%

Impact of the Initial Transient Interruption Voltage (ITIV) on the Design and Operation of Hybrid Current-Injection DC Circuit Breakers

Jehle

Biela

2020

2020 22nd European Conference on Power Electronics and Applications (EPE'20 ECCE Europe)

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“…Often, the more critical issue is the delay introduced by the data transmission. Applications such as [8] may require a relatively low data rate, but also a very low transmission delay, resulting in a high symbol rate of the data link. The same applies for any safety critical sensor.…”

Section: Introductionmentioning

confidence: 99%

Single Plastic Optical Fiber, Multiple Channel Data Link for Sensing Applications With PCB Implemented Transmitter and Receiver

Fuchs

Pritz

Tsolaridis

et al. 2020

IEEE Trans. Circuits Syst. I

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The limited physical bandwidth of optical data links can be utilised better using pulse amplitude modulation (PAM) schemes. PAM can also be used to implement multiple channels on a single fibre to reduce the fibre count. In this paper, PAM is used with an additional amplitude level transmitting the clock associated with the data. This allows a direct detection of the clock from the signal. Frequent returns to this additional peak level are used to determine the signal strength at the receiver. The paper presents a very compact PCB implemented transmitter achieving a data rate of up to 400 Mbps. Furthermore, three PCB implemented receiver designs that cover different speed (20-400 Mbps) and cost/complexity ranges are presented including measurement results. The proposed solutions are compared to various industry standard solutions in terms of their achievable sampling rate and measurement delay resulting from connected sensors. It is concluded that PAM based data links represent an attractive alternative to the usual time domain multiplexing based 8b/10b encoded no-return-to-zero (NRZ) data links. They lead to an increase of the possible sampling rate (278 %) of the sensor and a decrease of the measurement delay (20 %), while keeping the same signal bandwidth and number of fibres.

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Optimization of Hybrid Current-Injection Circuit Breakers Including Mechanical Switch Limitations

Jehle

Biela

2019

2019 21st European Conference on Power Electronics and Applications (EPE '19 ECCE Europe)

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Circuit breakers with current injection enable fast interruption of fault currents in DC grids. Independent of the topology, a high number of semiconductors and capacitors is required. The minimum required number of semiconductors and capacitors depend mainly on the system voltage and the maximum fault current. However, also the MS characteristics have considerable influence on the required number of semiconductors and capacitors. Therefore, in this paper the influence of the MS characteristics on the arc extinction and the influence of the arc voltage on the DC-CB design is presented. In addition, optimization procedures for current injection circuit breaker are presented, which include the MS characteristics and four different possibilities to include the arc voltage. Finally, three DC-CB topologies are compared in terms of number of semiconductors and capacitors.

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Design Procedure and Control of a Hybrid Circuit Breaker with Adaptable Pulse Current Injection

Cited by 3 publications

References 19 publications

Impact of the Initial Transient Interruption Voltage (ITIV) on the Design and Operation of Hybrid Current-Injection DC Circuit Breakers

Impact of the Initial Transient Interruption Voltage (ITIV) on the Design and Operation of Hybrid Current-Injection DC Circuit Breakers

Single Plastic Optical Fiber, Multiple Channel Data Link for Sensing Applications With PCB Implemented Transmitter and Receiver

Optimization of Hybrid Current-Injection Circuit Breakers Including Mechanical Switch Limitations

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