Technical and Economic Analysis of the R-Type SFCL for HVDC Grids Protection

Garcia, William Ricardo Leon; Tixador, Pascal; Raison, Bertrand; Luscan, Bruno; Creusot, Christophe

doi:10.1109/tasc.2017.2739642

Cited by 44 publications

(22 citation statements)

References 22 publications

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“…The internal three-phase short-circuit fault in the HTS cable was applied to validate the performance of the proposed protection system. It is assumed that the fault is applied at 0.5 s and the fault resistance is calculated by Warrington's equation in [22], as given by Equation (8). The mechanism delay of the medium voltage circuit breaker (CB) is five cycles for a complete opening time.…”

Section: Simulation Resultsmentioning

confidence: 99%

“…HTS cables are able to conduct bulk power at low voltage cables, which results in the widespread application in electric power systems [3][4][5]. The uses of HTS cables in HVDC transmission systems have been presented in [6][7][8]. In urban areas where land availability is limited, the HTS cable can replace the traditional high voltage transmission system to supply power for the urban load [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

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Fault Analysis and Design of a Protection System for a Mesh Power System with a Co-Axial HTS Power Cable

et al. 2020

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The uses of high-temperature superconducting (HTS) cables pose a challenge of power system protection since the impedance of the HTS cable is varied during fault conditions. The protection systems should be designed properly to ensure the reliability and stability of the whole system. This paper presents a fault analysis of the co-axial HTS cable in the mesh system and proposes a coordinated protection system. In the proposed protection system, the main protection is the differential current relay whereas the backup protections are the overcurrent and directional overcurrent relays. The normal and abnormal relay operations are considered to analyze the transient fault current in the HTS cable and evaluate the performance of the proposed coordinated protection system. Characteristics of cable impedances and temperatures under various fault conditions are presented. The proposed protection scheme is validated by the simulation in the PSCAD/EMTDC program. Simulation results show that the coordinated protection scheme could successfully protect the HTS cables in both normal and abnormal relay operations.

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Section: Simulation Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Fault Analysis and Design of a Protection System for a Mesh Power System with a Co-Axial HTS Power Cable

et al. 2020

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“…However, their application in the DC grid has not been investigated thoroughly. A few published papers have focused on limiting characteristics of SFCLs in HVDC grid application [22], economic evaluation [23] and optimization [24], and are limited to deriving appropriate impedance values without consideration of the recovery characteristics of SFCL [25]. In addition, interruption characteristics of DCCB in DC grid are dealt with in few papers, but the supportive role of SFCL for circuit breaker operation has not been considered with a thorough comparison of limiting and recovery characteristics [26][27][28].…”

Section: Literature Reviewmentioning

confidence: 99%

Appropriate Protection Scheme for DC Grid Based on the Half Bridge Modular Multilevel Converter System

et al. 2019

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The half bridge (HB) modular multilevel converter (MMC) technology is considered a breakthrough to mitigate the shortcomings of the conventional voltage source converter (VSC) in high-voltage direct-current (HVDC) grid application. However, interruption of the DC fault is still a challenge due to fast di/dt and extremely high levels of DC fault current. The fault interruption using a DC circuit breaker (DCCB) causes enormous energy dissipation and voltage stress across the DCCB. Therefore, the use of a fault current limiter is essential, and the superconducting fault current limiter (SFCL) is the most promising choice. Past literature has focused on the operating characteristics of DCCB or limiting characteristics of the SFCL. However, there is little understanding about the fault interruption and system recovery characteristics considering both DCCB and SFCL. In this paper, we have presented a comparative study on fault interruption and system recovery characteristics considering three types of fault limiting devices in combination with circuit breaker. The transient analyses of AC and DC system have been performed, to suggest the most preferable protection scheme. It has been concluded that, amongst the three fault limiting devices, the Hybrid SFCL in combination with circuit breaker, delivers the most desirable performance in terms of interruption time, recovery time, energy dissipation and voltage transients.

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“…Ac-side LCL filters [11] can suppress fault current contribution from the ac grid but lead to increased conduction losses at partial loading. Superconductive fault current limiters [12,13] can reduce MMC's fault current and do not impact grid dynamics in normal operation but technology is complex, immature and lacks substantial field experience.…”

Section: Introductionmentioning

confidence: 99%

Coordination of Mechanical DCCBs and Temporary Blocking of Half Bridge MMC

Zaja¹,

Jovcic

2019

15th IET International Conference on AC and DC Power Transmission (ACDC 2019)

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This paper proposes a dc grid protection strategy based on temporary MMC blocking in combination with mechanical DCCBs on dc lines. MMCs are blocked for only a short period of time while DCCBs operate and resume operation afterwards. A comparison is made with a protection strategy in which MMC blocking is avoided. The study analyses the impact of dc faults on dc power flow, ac system, DCCB dimensioning and MMC's antiparallel diodes. Operation is demonstrated on a point-to-point HVDC and a three-terminal dc grid, also using thermal model of MMC's IGBT module. Main benefits of the proposed strategy are simplicity and low protection system cost. On the downside, antiparallel diodes are exposed to greater current and thermal stress.

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Technical and Economic Analysis of the R-Type SFCL for HVDC Grids Protection

Cited by 44 publications

References 22 publications

Fault Analysis and Design of a Protection System for a Mesh Power System with a Co-Axial HTS Power Cable

Fault Analysis and Design of a Protection System for a Mesh Power System with a Co-Axial HTS Power Cable

Appropriate Protection Scheme for DC Grid Based on the Half Bridge Modular Multilevel Converter System

Coordination of Mechanical DCCBs and Temporary Blocking of Half Bridge MMC

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