Fault Current Limitation (FCL) and Voltage Dip Improvement Thanks to Distributed Static Series Compensator (DSSC)

This paper presents the comprehensive implementation of Distributed Static Series Compensator (DSSC) to limit the fault currents in power systems. This is the first time that the limitation of fault currents with D-FACTS devices is addressed. DSSC is one of the D-FACTS families whichoperate in a similar manner as Static Synchronous Series Compensator (SSSC) but in smaller size, lower price and more capability. The effectiveness of the DSSC in fault current limitation is investigated through the series voltage effect upon the line. The short circuit current limitation strategy presented here exhibited that besides of the power flow control which is carried out by DSSC; it can also perform this additional function. In the following the potency of the DSSC in reduction of instantaneous voltage dip range during fault current limiting mode is clarified. Furthermore, it is disclosed that with performing more DSSC in the power system, the entire system voltage dip will be improved. In order to validate the claims, computer simulations using PSCAD/EMTDC are exploited.

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Power-Flow Control and Short-Circuit Current Limitation of Wind Farms Using Unified Interphase Power Controller

IEEE Transactions on Power Delivery ◽

10.1109/tpwrd.2016.2585578 ◽

2017 ◽

Vol 32 (1) ◽

pp. 62-71 ◽

Cited By ~ 19

Author(s):

M. Firouzi ◽

G. B. Gharehpetian ◽

B. Mozafari

Keyword(s):

Flow Control ◽

Power Flow ◽

Short Circuit ◽

Wind Farms ◽

Short Circuit Current ◽

Power Flow Control ◽

Current Limitation ◽

Power Controller

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Semiconductor fault-current limiters. Part 1: Problems connected with and possible schemes for implementing short-circuit current limitation in power systems

IEE Proceedings C Generation Transmission and Distribution ◽

10.1049/ip-c.1984.0013 ◽

1984 ◽

Vol 131 (3) ◽

pp. 94

Author(s):

S. Palanichamy ◽

P. Chinnasamy

Keyword(s):

Power Systems ◽

Short Circuit ◽

Short Circuit Current ◽

Fault Current ◽

Current Limitation ◽

Fault Current Limiters

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Impact of Momentary Cessation Voltage Level in Inverter-Based Resources on Increasing the Short Circuit Current

Sustainability ◽

10.3390/su11041153 ◽

2019 ◽

Vol 11 (4) ◽

pp. 1153 ◽

Cited By ~ 3

Author(s):

Namki Choi ◽

Bohyun Park ◽

Hwanhee Cho ◽

Byongjun Lee

Keyword(s):

Power Systems ◽

Short Circuit ◽

Circuit Breaker ◽

Short Circuit Current ◽

Fault Current ◽

Test Results ◽

Voltage Level ◽

Fault Currents ◽

Current Calculation ◽

The Impact

This study analyzed the impact of varying the momentary cessation (MC) voltage level on the short circuit current of inverter-based resources (IBRs). To analyze the impact of the IBR MC function on the short circuit current, this paper proposes an advanced IBR model for fault current calculation to reflect its fault characteristics and a scheme for analyzing the influence of MC on the short circuit current. Based on the proposed methods, the authors conducted case studies using planning data from the Korea Electric Power Corporation (KEPCO). The influence of MC was investigated on the IBRs located at the southwest side of the KEPCO systems by screening the fault currents while varying the MC voltage. This paper demonstrates that the minimum MC voltage level needed for the fault current not to exceed the circuit breaker (CB) capacity can be proposed through analyzing the impact of MC voltage level on the short circuit current. The test results based on the proposed scheme showed that the short circuit current to power systems could not violate CB capacity if IBRs adjusted the MC voltage level higher than the lowest MC voltage level.

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Short-Circuit Fault Analysis of the Sen Transformer Using Phase Coordinate Model

Energies ◽

10.3390/en14185638 ◽

2021 ◽

Vol 14 (18) ◽

pp. 5638

Author(s):

Liang Bu ◽

Song Han ◽

Jinling Feng

Keyword(s):

Power Flow ◽

Short Circuit ◽

Voltage Regulation ◽

Fault Analysis ◽

Power Flow Control ◽

Fault Currents ◽

Proposed Model ◽

Three Phase ◽

Coordinate Model ◽

The Time Domain

The Sen Transformer (ST) provides an economical solution for power flow control and voltage regulation. However, fault analysis and evaluation of the performance of the transmission protection system in the presence of a ST have not been investigated. Hence, a short-circuit model of the ST using the phase coordinate method is proposed in this paper. Firstly, according to the coupled-circuit ST model, the nodal admittance matrix between the sending end and receiving end of the ST was deduced. Subsequently, a fully decoupled mathematical model was established that can reflect three characteristics, including its winding connection structure, electrical parameters, and ground impedance. Thus, with the help of the phase-coordinate-based solving methodology, a short-circuit ST model may be built for various short-circuit faults. The MATLAB and PSCAD/EMTDC software were employed to carry out simulated analyses for an equivalent two-bus system. The short-circuit currents obtained from the time-domain simulation and the analytic calculation utilizing the proposed model reached an acceptable agreement, confirming the simulation’s effectiveness. Moreover, the variation of the fault currents with the variation of the compensating voltage after single-phase-to-ground and three-phase short-circuit faults was demonstrated and used to analyze the effect of the ST on the fault currents.

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Fault Diagnosis Algorithm and Protection of Electric Power Systems in an Alternative Distribution System

Journal La Multiapp ◽

10.37899/journallamultiapp.v1i3.192 ◽

2020 ◽

Vol 1 (3) ◽

pp. 8-16

Author(s):

Oshin Ola Austin ◽

Oluwasanmi Alonge ◽

Ajayi Joseph Adeniyi

Keyword(s):

Power Systems ◽

Distribution System ◽

Short Circuit ◽

Circuit Breaker ◽

Research Work ◽

Short Circuit Current ◽

Phase System ◽

Fault Current ◽

Circuit Breakers ◽

Protective Devices

In any power systems, protective devices will detect fault conditions and operate circuit breakers in order to disconnect the load from the fault current and limit loss of service due to failure. This fault may involve one or more phases and the ground, or may occur between two or more phases in a three-phase systems. In ground, fault’ or ‘earth fault, current flows into the earth. In a poly-phase system, a fault may affect each of the three phases equally which is a symmetrical fault. If only some phases are affected, the resulting ‘asymmetrical fault’ becomes more complicated to analyze due to the simplifying assumption of equal current magnitude in all the phases being no longer applicable. Therefore, the prospective short circuit current of the fault can be calculated for power systems analysis procedures. This will assist in the choice of protective devices like circuit breakers, current transformers and relays. This research work evaluated and analyzed the occurrence of faults in a distribution system. Fault currents were obtained and the maximum tripping time required for the protective devices to operate were determined. Hence, it was possible to select appropriate relay and circuit breaker for effective operation of a distribution

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A Method of Online Topology Adjustment Decision Support for Short-Circuit Current Limitation

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.805-806.756 ◽

2013 ◽

Vol 805-806 ◽

pp. 756-762

Author(s):

Bi Qiang Tang ◽

Li Wen Wang ◽

Yi Jun Yu ◽

Fei Shi ◽

Shu Hai Feng

Keyword(s):

Decision Support ◽

Power Systems ◽

Optimization Algorithm ◽

Large Scale ◽

Short Circuit ◽

Short Circuit Current ◽

Sensitivity Index ◽

Detailed Calculation ◽

Current Limitation ◽

Grid Topology

With the growing scale of power systems in China, short-circuit current levels of power systems have been significantly increasing. Appropriate grid topology adjustment is an effective method for short-circuit current limitation. The specific measures include transmission line outage, transformer outage, etc. In this paper, a practical optimization algorithm of grid topology adjustment is put forward. A weighted comprehensive sensitivity index is adopted to speed up the procedure of adjustment strategy searching. The detailed calculation method of this index for different measure types is presented. And a security & economy assessment is implemented to ensure the feasibility of potential adjustment strategies. Moreover, the framework of an online topology adjustment decision support software based on this optimization algorithm is proposed. The effectiveness of the presented method is demonstrated by the test on a large-scale power system.

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A Type of Depth Fault Current Limiter Based on Fast Switch and its Experimental Research

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.521.213 ◽

2014 ◽

Vol 521 ◽

pp. 213-216

Author(s):

Li Jun Qin ◽

Xiao Teng Wu

Keyword(s):

Power System ◽

Energy Loss ◽

Short Circuit ◽

Circuit Breaker ◽

Short Circuit Current ◽

Current Level ◽

Fault Current ◽

Fault Current Limiter ◽

Fault Currents ◽

Current Limiter

Along with the expansion of power system, the rapid growth of load in power system and large capacity generators continuously going into operation, the increasing of short-circuit current level cause a serious threat to the security of the power system. The contradiction between high fault currents and limited circuit breaker interrupting capacity is prominent, in order to limit high short-circuit current, reduce the energy loss of traditional fault current limiter, and improve the limiting depth, this paper presents an new fault current limiter (FCL), and analysis its ability of limiting short current.

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A Fault Current Limiter Circuit to Improve Transient Stability in Power System

International Journal of Power Electronics and Drive Systems (IJPEDS) ◽

10.11591/ijpeds.v7.i3.pp769-780 ◽

2016 ◽

Vol 7 (3) ◽

pp. 769 ◽

Cited By ~ 1

Author(s):

Saumen Dhara ◽

Alok Kumar Shrivastav ◽

Pradip Kumar Sadhu ◽

Ankur Ganguly

Keyword(s):

Power System ◽

Distribution System ◽

Transient Stability ◽

Short Circuit ◽

Short Circuit Current ◽

Fault Current ◽

Fault Current Limiter ◽

Current Limitation ◽

Primary Model ◽

Current Limiter

Short circuit current limitation in distribution system utilities can be an operational approach to improve power quality, since the estimated voltage sag amplitude during faults may be intensely reduced. The application of superconducting fault current limiter (SFCL) is projected here to limit the fault current that occurs in power system. SFCL utilizes superconductors to instantaneously decrease the unanticipated electrical surges that happen on utility distribution and power transmission networks. SFCL considerably decrease the economic burden on the utilities by reducing the wear on circuit breakers and protecting other expensive equipment. The designed SFCL model is used for determining an impedance level of SFCL according to the fault current limitation necessities of different types of the smart grid system. The representation of this paper about to see the optimum resistive value of SFCL for enhancing the transient stability of a power system. The assessment of optimal resistive value of the SFCL connected in series in a transmission line with a conductor throughout a short circuit fault is consistently determined by applying the equal-area criterion supported by power-angle curves. A Simulink based primary model is developed and additionally the simulation results for the projected model are achieved by using MATLAB.

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