Reliability Study of HV Substations Equipped With the Fault Current Limiter

Fotuhi-Firuzabad, M.; Aminifar, Farrokh; Rahmati, Iman

doi:10.1109/tpwrd.2011.2179122

Cited by 51 publications

(34 citation statements)

References 17 publications

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“…However, solutions can be provided for isolated scenarios [10,11,12], although a detailed analysis is necessary to select the correct and most economical solution for a particular situation (fault location, particular network, and SFCL location). Nevertheless, for each scenario and with a predefined location for installing the SFCL, it is possible to study the reliability figures of the protection scheme, by analysing the multiple locations where a fault event may occur, i.e, the first peak limiting performance is assessed at the different busbars of a power network under different fault events.…”

Section: Introductionmentioning

confidence: 99%

Optimal location and minimum number of superconducting fault current limiters for the protection of power grids

Zhang

Geng

Coombs

2017

International Journal of Electrical Power & Energy Systems

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This paper presents a novel method to determine the optimal strategy for the allocation of multiple resistive superconducting fault current limiters (SFCLs) aiming to improve the overall protection of standard power grids. The presented approach allows for the straightforward determination of the optimal resistance of the SFCL, accounting for short circuit events occurring at different locations, by modelling the electro-thermal properties of the SFCL via a temperature dependent E-J power law. This material law, based on previous experimental evidence, allows for the introduction of flux pinning, flux creep, and flux flow properties of the superconducting material within a minimum level of complexity. Thereby, we have observed a distinctive kink pattern in the current limiting profiles of the SFCLs, from which no further reduction of the first peak of the fault current is achieved when a greater resistance is considered, allowing a univocal determination of the optimum SFCL resistance. This peculiarity is not observed when the model for the quench properties of the SFCL is simplified towards an exponential resistance, although the last can be used as an auxiliary process for addressing the first guess on the resistance value required for a specific strategy, as it demands less computing time. We have also determined that for many of the cases studied, i.e, for the combinations between one or more SFCLs installed at different locations, and those subjected to fault events located at different points in the network, the recovery time of the superconducting properties of at least one of the SFCLs can last for more than five minutes, constraining the feasibility of a large-scale deployment of this technology. However, by assuming that the practical operation of the SFCL is assisted by the automatic operation of a bypass switch when the SC material is fully quenched, we have determined that the optimal strategy for the overall protection of power grids of standard topology requires a maximum of three SFCLs, with recovery times of less than a few seconds. This information is of remarkable value for power system operators, as it can establish a maximum investment threshold which ultimately can facilitate making decisions regarding the deployment of SFCL technologies.

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Section: Introductionmentioning

confidence: 99%

Optimal location and minimum number of superconducting fault current limiters for the protection of power grids

Zhang

Geng

Coombs

2017

International Journal of Electrical Power & Energy Systems

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“…Moreover, many of the existing protective devices need several cycles to interrupt the short-circuit current. This means, in the case of a low-impedance fault, the first few high-fault current peaks pose high thermal and electromagnetic stresses on both the protection devices and any downstream equipment [6]. The natural way to solve the problem is to upgrade the conductors and the protection gear in the system.…”

Section: Introductionmentioning

confidence: 99%

Analysis of a Switched Impedance Transformer-Type Nonsuperconducting Fault Current Limiter

Chen

Ball

et al. 2015

IEEE Trans. Power Electron.

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This paper proposes a nonsuperconducting fault current limiter (NSFCL) topology and control strategy. The switched impedance transformer-type NSFCL topology is optimized to protect against short transients and to work in conjunction with other fuses or circuit breakers, hence has the merits of being simple, low cost, and compact. A prototype has been designed and built for a three-phase 600-V R M S ,L −L system. It has been tested in a ULcertified high-power test lab with 5-A normal current and 100-kA potential fault current.Index Terms-Bridge rectifier, fault current limiters (FCLs), high-power faults.

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“…As a matter of fact, reliability and economics are two conflicting aspects to be analyzed for the ultimate decision making. Thus, in [14], reliability of substa tion architectures accommodating the FCL operation was assessed and the FCL effects on the substation reliability indices were numerically investigated.…”

Section: Introductionmentioning

confidence: 99%

INSGA-II implementation for optimal placement and design of flux-lock type superconducting fault current limiter with tap changer for improving distribution system reliability

Hashemi

Valipour

Hashemi³

2015

Russ. Electr. Engin.

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Improved non dominated sorting genetic algorithm II (INSGA II) implementation for the assignment of the optimal location and tap changer adjustment related to flux lock type superconducting fault current limiter with tap changer (TC FLSFCL) is presented in this paper. TC FLSFCL is a flexible SFCL that has preference over previous SFCLs. In this type of SFCL the current limiting characteristics are improved and the fault current limiting level during a fault period can be adjusted by controlling the current in the third winding, which also makes the magnetic field apply to the high Tc superconducting (HTSC) ele ment. Three objective functions, based on reliability index, reduction of fault current, and number of installed TC FLSFCL, are systematized and improved non dominated sorting genetic algorithm II (INSGA II) style is then formed in the search for the best location and tuning of the tap changer of TC FLSFCL to meet the fitness requirements. A decisionmaking procedure based on the technique for order preference by similarity to ideal solution (TOPSIS) is used for finding the best compromise solution from the set of Pareto solutions obtained by INSGA II. In a distribution network as bus 4 of Roy Billinton test system (RBTS), comparative analysis of the results obtained from the application of the resistive SFCL (RSFCL) and TC FLSFCL is pre sented. The results show that optimal placement of TC FLSFCL compared with RSFCL can improve reli ability index and fault current reduction index with a less number.

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Reliability Study of HV Substations Equipped With the Fault Current Limiter

Cited by 51 publications

References 17 publications

Optimal location and minimum number of superconducting fault current limiters for the protection of power grids

Optimal location and minimum number of superconducting fault current limiters for the protection of power grids

Analysis of a Switched Impedance Transformer-Type Nonsuperconducting Fault Current Limiter

INSGA-II implementation for optimal placement and design of flux-lock type superconducting fault current limiter with tap changer for improving distribution system reliability

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