A novel approach for improvement of power swing blocking and deblocking functions in distance relays

Tekdemir, Ibrahim Gursu; Alboyacı, Bora

doi:10.1109/pesgm.2017.8273926

Cited by 10 publications

(14 citation statements)

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“…In order to prevent undesirable distance relay tripping during power swing, power swing blocking function is employed in distance relay to provide robust protection scheme during power swing [5]. However, if a fault occurs during power swing, the blocking function should be released and a trip signal should be activated by the distance relay for fault clearing operation [6].…”

Section: Introductionmentioning

confidence: 99%

Detection of fault during power swing in test system interconnected with DG

Mohamad

Abidin

Musirin

2019

IJEECS

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<span>Distance relay is prone to mal-operate during power swing, thus most of modern distance relay design is equipped with power swing blocking scheme to block the operation during power swing and reset the blocking operation whenever a fault occurs during power swing. However, the detection of fault during power swing especially for high resistance fault possess a challenging task, therefore it may cause the unblocking function to vulnerable to operate. This paper presents the development of a detection scheme for detecting fault during power swing in test system interconnected with Distributed Generation (DG). In this study, the detection scheme is proposed based on S-Transform analysis on the distance relay input voltage signal. It is demonstrated that the proposed S-Transform detection based scheme can effectively detect various type of fault during power swing includes high resistance fault, as well as able to operate correctly even with the presence of DG in the test system.</span>

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Section: Introductionmentioning

confidence: 99%

Detection of fault during power swing in test system interconnected with DG

Mohamad

Abidin

Musirin

2019

IJEECS

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“…The simplification done in evaluating the magnitudes of each frequency was compensated by the accuracy and time required for transforming from time domain to frequency domain. The other innovative methodologies involve, Taylor series expansion using error estimation [12]; usage of negative sequence components in evaluating negative sequence apparent power [13]; evaluation of a power swing and fault using index by using voltage angle and active power flows [14]; Lissajous figures obtained from voltages and currents signals [15]; differences observed in the phase angles of currents [16]; and usage of differential power coefficients which estimates the difference in predicted and actual power flows leading to identification of fault [17].…”

Section: Introductionmentioning

confidence: 99%

Discriminating Faults from Power Swing Using Impedance Angle and Analysis in Three Dimensional Space

Zeno¹,

Orillaza²

2019

IJCEE

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Faults lead to de-energising of a section of transmission line thus decreasing the reliability of the system. Power swing affects the distance relays leading to false alarms which were the leading cause of unreliability. Faults cause permanent movement of the operating point in RX plot with a transient oscillation. The locus of power swing forms closed loops. Here, impedance angles were used to discriminate the faults from power swing. The investigation was carried out along with three dimensional plots to visualize the locus of impedance in resistance, reactance and time axis. Results signify that faults were differentiated from power swing using differential impedance angle. The test cases include all the unbalanced faults as well as an unstable swing. Power swing formed bi-conical loops above and below the ideal operating impedance, while differential impedance formed hyperboloid with the mean impedance being zero. Simulations were carried out in a 2 bus system and all the voltages and currents were extracted from the center of transmission line. Visual representation of normal operating impedances and power swing using three dimensional plots (R-X-t space) and (dR/dt-dX/dt-t space) were shown in the Appendix.

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“…However, UPFC can reduce this index to <0.7 during power swing. The proposed method in [25] is based on estimating a future sample and error calculation and then index value (DI) based on sum of the entire squares of errors in the data window. However, the reliability of this method decreases in UPFC compensated line by harmonic infiltration.…”

Section: Introductionmentioning

confidence: 99%

Modified concentric power swing blocker applicable in UPFC compensated line

Khodaparast

Khederzadeh

2018

IET Generation, Transmission & Distribution

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Flexible AC transmission systems (FACTS) devices have adverse impacts on the performance of distance relays (DRs) due to the fast intervention of the controllers of these devices during power swing. Power swing blocker (PSB) as the complementary part in a DR is designed to distinguish a fault from a power swing; meanwhile its performance in compensated lines needs to be investigated. The performance of concentric PSB (CPSB) is studied in transmission lines compensated by unified power flow controller (UPFC). It is shown that fast responses of proportional-integral (PI) controllers of UPFC, reduce recorded time by CPSB significantly (it decreases by 90% of uncompensated condition) which makes DR to issue trip command during power swing condition. Detailed model of UPFC is simulated in three-machine and New England power systems to show the deficiency of CPSB in compensated condition. In order to overcome the deficiency of the CPSB in UPFC-compensated line, two remedial actions are proposed. The first method is based on modifying CPSB to solve the problem and the second method is based on modifying control loop of UPFC to prevent the problem. Both methods show their efficiency to overcome the deficiency.

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A novel approach for improvement of power swing blocking and deblocking functions in distance relays

Cited by 10 publications

References 0 publications

Detection of fault during power swing in test system interconnected with DG

Detection of fault during power swing in test system interconnected with DG

Discriminating Faults from Power Swing Using Impedance Angle and Analysis in Three Dimensional Space

Modified concentric power swing blocker applicable in UPFC compensated line

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