An effective combined method for symmetrical faults identification during power swing

Moravej, Zahra; Ashkezari, Jamal Dehghani; Pazoki, Mohammad

doi:10.1016/j.ijepes.2014.07.039

Cited by 52 publications

(22 citation statements)

References 20 publications

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“…When symmetrical fault occurs, there are no zero‐sequence and negative‐sequence components in the system; thus, it is difficult to distinguish between symmetrical fault and oscillation . This paper mainly focuses on the discrimination between symmetrical fault and oscillation.…”

Section: Theorymentioning

confidence: 99%

Distance protection blocking and re-opening scheme in multi-machine power system oscillation scenes

Kang

et al. 2018

Int Trans Electr Energ Syst

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In view of frequent multi-machine power system oscillations in power grid which may cause traditional oscillation blocking and re-opening schemes to be completely invalid, a distance protection oscillation blocking and re-opening scheme in multi-machine power system oscillation scenes is proposed in this paper. First, the ride-through trajectory of measured impedance in multimachine power system oscillation cases and its effect on the operation characteristic of distance protection is analyzed, and the oscillation blocking scheme is formed by combining the operation status information of protection components on 2 line ends. And then, in the oscillation blocking duration, by calculating the estimated error of the dynamic phasor of measured current at the relaying point, the protection re-opening scheme for symmetrical fault during oscillation is established. Finally, simulation tests on PSCAD in 3-machine system and IEEE 39-bus system verify that the proposed scheme could reliably block the protection when oscillation occurs in multi-machine power system, and re-open the protection accurately and reliably when symmetrical fault occurs during oscillation. KEYWORDS distance protection, dynamic phasor, multi-machine power system oscillation, oscillation blocking 1 | INTRODUCTION When power system is disturbed by factors such as transmission line fault and heavy-load line switch on/off, etc., oscillation will easily result. 1 The incorrect operation of distance protection on transmission line which identifies whether fault occurs by calculating the measured impedance during oscillation will enlarge the influence range of oscillation, greatly endangering the safe and stable operation of power system. 2 In regional inter-connected power grid that is becoming ever more complicated, the probability of multi-machine power system oscillation is also increasing rapidly, 3 in which case the oscillation center may move dynamically along different routes, causing traditional double-source analysis model to be invalid. 4,5 Therefore, it is urgent to study in depth the effect of multi-machine power system oscillation on existing protection policy and put forward effective oscillation blocking and protection re-opening scheme.Currently, research on oscillation blocking is mostly based on 2-generator model and is mainly focused on the following aspects. First, identification criteria based on swing center voltage (SCV) could realize re-opening for symmetrical fault during oscillation, with certain time delay. 6,7 Second, identification criteria based on the compensation principle could determine whether it is oscillation or short circuit fault that occurs within the protection range, but it is difficult to set the compensation value when the line is heavily loaded. 8,9 Third, identification criteria based on the apparent

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Section: Theorymentioning

confidence: 99%

Distance protection blocking and re-opening scheme in multi-machine power system oscillation scenes

Kang

et al. 2018

Int Trans Electr Energ Syst

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“…Methods based on the derivative of the three-phase power, 14 the decaying dc component of the fault current, 15 the power differential technique, 16 and the fast Fourier transform coefficient of the active power 17 are proposed for detection of symmetrical faults. Methods based on advanced signal processing techniques such as S-transform and probabilistic neural network, 18 transient monitor function, 19 phase-space approach, 20 Fisher asymmetry coefficient, 21 and zerofrequency filtering 22 are proposed for fast detection of symmetrical faults.…”

Section: Introductionmentioning

confidence: 99%

An unblocking assistance to distance relays protecting TCSC compensated transmission lines during power swing

Biswas

Nayak

2019

Int Trans Electr Energ Syst

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Summary Modern digital distance relays are incorporated with power swing blocking functions to avoid false operation during power swing. At the same time, it is also crucial to detect a fault correctly and quickly if occurs during power swing for unblocking and allowing the relay to trip the line. Detection of faults in thyristor controlled series capacitor (TCSC) compensated transmission lines during power swing is very challenging due to the nonlinear functioning of the thyristor controlled reactor and the metal‐oxide varistor protecting the series capacitor. This paper proposes a fault detection technique for TCSC compensated transmission lines during power swing using the generalized Teager‐Kaiser energy operator on the instantaneous current signal. The performance evaluation on a wide variety of test data generated on the modified WSCC three‐machine nine‐bus system and the modified IEEE 39‐bus New England system through EMTDC/PSCAD justify the efficacy of the proposed method.

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“…The machine learning techniques are popular for classification of different power system events because of their high accuracy. Different intelligent tools such as adaptive neuro‐fuzzy interface system [21], neural network [22, 23], support vector machine (SVM) [24, 25], decision tree (DT) [26] and random forest (RF) [26] are applied to isolate faults from power swing. Features are extracted from the fault signals by different techniques for training these tools.…”

Section: Introductionmentioning

confidence: 99%

Differential voltage‐based fault detection during power swing

Patel

Bera

Dey

2019

IET Generation, Transmission & Distribution

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An effective combined method for symmetrical faults identification during power swing

Cited by 52 publications

References 20 publications

Distance protection blocking and re-opening scheme in multi-machine power system oscillation scenes

Distance protection blocking and re-opening scheme in multi-machine power system oscillation scenes

An unblocking assistance to distance relays protecting TCSC compensated transmission lines during power swing

Differential voltage‐based fault detection during power swing

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