The impact of HTS cables on power flow distribution and short-circuit currents within a meshed network

Jipping, J.; Mansoldo, Andrea; Wakefield, C.

doi:10.1109/tdc.2001.971329

Cited by 17 publications

(3 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The cables are modeling using simple transmission lines models, with the assumption that they will not quench as a result of the fault current. The cable resistance, inductance and capacitance parameters are based on those in [1], and are listed in Table I. The transmission line models were divided into three sections with lengths of 6 km, 9.1 km, and 16.7 km to provide intermediate terminations to apply faults.…”

Section: Example System Modelmentioning

confidence: 99%

“…T HE replacement of conventional underground cables and overhead transmissions lines provides many performance advantages for a power system operator, since the cables have lower series inductance and much lower series resistance [1]. However, as the use of superconducting power apparatus increases, the application of power systems protection systems will need to be modified in turn.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Impacts of Superconducting Cables on the Dynamic Response of Current Transformers and Protective Relaying Devices

Johnson

Fischer²,

Xia

2011

IEEE Trans. Appl. Supercond.

View full text Add to dashboard Cite

Replacing conventional ac transmission lines with superconducting cables provides performance advantages since superconducting cables have lower series inductance and very low ac resistance. However, the very low resistance will also have an impact on the dynamic response of current transformers (CTs) and on the response of protective relays that process their current measurements. Whenever a short circuit occurs on an ac power system the resulting current will have both fundamental frequency ac response and a decaying dc offset. The amplitude of the dc offset is dependent on the point on the ac voltage wave where the fault occurs, which is random. The rate of this decay depends on the R-L time constant of the ac circuit involved in the current path. A larger time constant increases the odds that a CT will enter saturation. Superconducting cables will increase the R-L time constant, and potentially increase the severity of CT saturation, creating error in the secondary current used by the protective relays. For many protection functions this error will delay the protective action, but in a few cases it may cause circuit breakers to trip in error. This paper will model a sample system with differing levels of penetration of superconducting cables and look at the impact of the superconducting cables on the dynamic CT response and on different protective relay functions and discuss potential solutions.

show abstract

Section: Example System Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Impacts of Superconducting Cables on the Dynamic Response of Current Transformers and Protective Relaying Devices

Johnson

Fischer²,

Xia

2011

IEEE Trans. Appl. Supercond.

View full text Add to dashboard Cite

show abstract

“…Recently-published research on several cable development programs and reliability issues [1] highlights the dramatically lower impedance of coaxial, cold-dielectric HTS cable. Impedance in an electrical transmission circuit determines the power flow division among many cables connected in parallel.…”

Section: Vli Cable Architecturementioning

confidence: 99%

Very Low Impedance (VLI) Superconductor Cables

McCarthy

2005

IEEE Trans. Appl. Supercond.

View full text Add to dashboard Cite

High Temperature Superconductor (HTS) cable is regarded as one of the most promising new technologies to address grid bottlenecks. Among HTS cable designs, one in particular-shielded cold dielectric cable-offers performance advantages particularly well suited to today's siting, reliability and performance challenges. Shielded cold dielectric HTS transmission cables feature lower electrical losses; the virtual elimination of stray EMF; and significantly lower impedance than conventional cables and lines. Of particular importance, the very low impedance (VLI) inherent in cables of coaxial design makes it possible to control power flows over VLI circuits. In addition, variable impedance may be cost-effectively added to VLI circuits with relatively small angle, conventional phase angle regulators. Thus, VLI circuits can function like fully controllable DC circuits. The introduction of VLI cable enables new approaches to important challenges in grid management. The strategic insertion of relatively short segments of VLI cable to bridge bottlenecks can offload flows from overburdened conventional circuits, thereby expanding grid capacity, extending the useful life of conventional network elements, and raising overall asset utilization. With power markets in turmoil and transmission increasingly the center of attention, VLI cable is a breakthrough technology that has great potential as a cost-effective solution for many of the industry's most pressing problems.

show abstract

Integration of superconducting cables in distribution networks with high penetration of renewable energy resources: Techno-economic analysis

Hemdan

Kurrat

Schmedes³

et al. 2014

International Journal of Electrical Power & Energy Systems

View full text Add to dashboard Cite

The impact of HTS cables on power flow distribution and short-circuit currents within a meshed network

Cited by 17 publications

References 1 publication

Impacts of Superconducting Cables on the Dynamic Response of Current Transformers and Protective Relaying Devices

Impacts of Superconducting Cables on the Dynamic Response of Current Transformers and Protective Relaying Devices

Very Low Impedance (VLI) Superconductor Cables

Integration of superconducting cables in distribution networks with high penetration of renewable energy resources: Techno-economic analysis

Contact Info

Product

Resources

About