Superconducting fault current limiters Research Papers (original) (raw)

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In this paper a variable and controllable resistor type fault current limiter (FCL) is introduced for enhancement of transient stability of single machine infinite bus (SMIB) system with a double circuit transmission line. The optimal value of resistor during fault to reach the maximum stability of power system is computed. It is shown that, this optimal value depends on the fault location and the pre-fault active power of synchronous generator considering power demand changing. To show the effectiveness of the proposed FCL, analytical analysis including transient stability study and optimum resistor value calculation are presented. In addition, simulation results using PSCAD /EMTDC software are included to confirm the analytical analysis accuracy.

- by Behzad Naderi and +1
- •
- Electrical Engineering, Control Systems Engineering, Power System, Neural Networks
- by Vijender Bhootna
- •
- Superconducting fault current limiters

The inductive-type superconducting fault current limiters
(LSFCLs) mainly consist of a primary copper coil, a
secondary complete or partial super-conductor cylinder &
open magnetic iron core. Complete performance of these
devices significantly depends on the optimal selections of
its materials and dimensions of construction, electrical,
magnetic, thermal, and parameters. It is important to
identify a comprehensive model describing the
characteristics of LSFCL in a power system prior to its
fabrication.
When any fault occurs, the dynamic model will
characterize the overall phenomena to compare the
simulation results by varying LSFCL parameters to
maximize the merits of a FCL while minimizing its
drawbacks. The principle object of this paper is to
achieve a full penetrative approach of design of LSFCLs
by means of multi criteria decision-making techniques.

In this paper a variable and controllable resistor
type fault current limiter (FCL) is introduced for enhancement of
transient stability of single machine infinite bus (SMIB) system
with a double circuit transmission line. The optimal value of
resistor during fault to reach the maximum stability of power
system is computed. It is shown that, this optimal value depends
on the fault location and the pre-fault active power of
synchronous generator considering power demand changing. To
show the effectiveness of the proposed FCL, analytical analysis
including transient stability study and optimum resistor value
calculation are presented. In addition, simulation results using
PSCAD /EMTDC software are included to confirm the analytical
analysis accuracy.

In this paper, different current limiting
techniques are explained which are used to suppress
the excess magnitude of fault current during fault. A
various types of fault Current limiters (FCL) are used to
suppress fault current and hence saving in the
investment of high capacity circuit breakers. It uses
variety of new techniques for limiting excess fault
current. The focus is on superconducting technologies
i.e. Superconducting Fault Current Limiters (SFCL). The
various types of superconducting fault current limiters
are explained with their advantages, disadvantages and
applications. This paper reviews, various concepts
related to superconducting fault current limiters and
present research and developments in SFCL. At present,
SFCLs are not commercially available in electrical power
market but, present research and some successful field
trials shows that it will be available for commercial
applications soon.

- by rohini desai
- •
- Superconducting fault current limiters
- by Behzad Naderi and +1
- •
- Engineering, Power Electronics, Semiconductor Devices, Superconducting fault current limiters
- by Hossein Heydari
- •
- Optimization, Superconducting fault current limiters

Smart grid is an advancement of the existing electrical grid. The key feature of the future smart grid is the decentralization of the main power grid into number of smaller grids (known as micro grids). Interconnection of the distributed generating (DG) sources is required with the existing electrical grid to enhance the reliability of the power system. Extensive integration of DG sources within a smart grid causes failure of a successful implementation of smart grid due to the presence of enormous fault current. Superconducting Fault Current Limiter (SFCL) has the capability to reduce the fault current level within the first cycle of the fault current resulting in an increased transient stability of the power system. In this paper an application of a resistive type SFCL, designed in Simulink / SimPower System has been proposed to limit the fault current that occurs in an interconnected power system. A resistive type SFCL model has been developed in Simulink and the performance of SFCL at different locations has been analysed in the proposed system considering wind farm (10 MVA) as a distributed generating (DG) source with the conventional power plant, to reduce the fault current in micro grids. The feasible location of the SFCL having no negative effect on the DG source has been evaluated in three phase and single line to ground faults at various positions in the smart grid. Index Terms-conventional power plant, wind farm, micro grid, smart grid, superconducting fault current limiter, fault current.

This paper proposes a new parallel LC resonance type
Fault Current Limiter (FCL). This structure has low cast because
of using dry capacitor and non-superconducting inductor and
fast operation. The proposed FCL is able to limit fault current in
constant value near to pre-fault condition value against series
resonance type FCL. In this way, the voltage of point of common
coupling (PCC) will not change during fault. Analytical analysis
is presented in detail and simulation results are involved to
validate the effectiveness of this structure.

the demand for electricity is increasing rapidly and demand for power is running ahead of supply. The short-circuit capacity increases with the growth of interconnections in electrical systems. .The system parameters such as voltage and current are analysed during normal operating conditions and also during various fault conditions. The fault current limiter can be effectively used to limit the increase in over current during the fault condition. A Fault Current Limiter (FCL) is a revolutionary power grid device that limits the problems due to increase in fault current levels. It reduces prospective fault currents to a lower manageable level. The Super conducting Fault Current Limiter (SFCL) is one of the promising technologies to unravel fault current problem, because of its effective fault current limiting and quick recovery characteristic. The microgrid system with distributed generation during a three phase fault condition were simulated with and without SFCL in MATLAB/SIMULINK environment.

In this paper, voltage sag compensation of point of common coupling (PCC) using a new structure of fault current limiter (FCL) is proposed. The proposed structure prevents voltage sag and phase-angle jump of the substation PCC after fault occurrence. This structure has a simple control method. Using the semiconductor switch (insulated-gate bipolar transistor or gate turnoff thyristor at dc current rout leads to fast operation of the proposed FCL and, consequently, dc reactor value is reduced. On the other hand, the proposed structure reduces the total harmonic distortion on load voltage and it has low ac losses in normal operation. As a result, other feeders, which are connected to the substation PCC, will have good power quality. Analytical analysis and simulation results using PSCAD/EMTDC software and experimental results are presented to validate the effectiveness of this structure.

This paper proposes a new parallel-LC-resonance type
fault current limiter (FCL) that uses a resistor in series with
a capacitor. The proposed FCL is capable of limiting the fault
current magnitude near to the prefault magnitude of distribution feeder current by placing the mentioned resistor in the structure of the FCL. In this way, the voltage of the point of common coupling does not experience considerable sag during the fault.
In addition, the proposed FCL does not use a superconducting
inductor which has high construction cost. Analytical analysis for this structure is presented in detail, and simulation results using power system computer-aided design/electromagnetic transients, including dc software are obtained to validate the effectiveness of this structure. Also, an experimental setup is provided to show the accuracy of the analytic analyses and simulation results.

In this paper, transient stability improvement using bridge ‎type fault current limiter (FCL) is presented in single ‎machine infinite bus (SMIB) system with a double circuit ‎transmission line. Three single-phase sets of the proposed ‎FCL are installed at the beginning of feeder. The proposed ‎FCL inserts an inductance and a resistance in the fault ‎current pass. The insertion inductance and resistance not ‎only limits the fault current level in an acceptable value but ‎also improves transient stability of power system by ‎consuming excessive energy of synchronous generator ‎during fault. To reach maximum transient stability, the ‎optimal resistor value of the proposed FCL is calculated. ‎Analytical analysis and simulation results using ‎PSCAD/EMTDC software are presented to show the ‎current limiting future and transient stability enhancement ‎using the proposed FCL in SMIB.‎

- by Behzad Naderi and +1
- •
- Power Systems, Power System, Power system protection, stability and control, Superconducting fault current limiters

- by Mehdi Jafari
- •
- Engineering, Power Systems, Power System, Superconducting fault current limiters

In this paper, transient stability improvement using bridge
type fault current limiter (FCL) is presented in single
machine infinite bus (SMIB) system with a double circuit
transmission line. Three single-phase sets of the proposed
FCL are installed at the beginning of feeder. The proposed
FCL inserts an inductance and a resistance in the fault
current pass. The insertion inductance and resistance not
only limits the fault current level in an acceptable value but
also improves transient stability of power system by
consuming excessive energy of synchronous generator
during fault. To reach maximum transient stability, the
optimal resistor value of the proposed FCL is calculated.
Analytical analysis and simulation results using
PSCAD/EMTDC software are presented to show the
current limiting future and transient stability enhancement
using the proposed FCL in SMIB.

Superconducting fault current limiters Research Papers (original) (raw)

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