New line current differential rehav using gps synchronization

Hall, I.; Beaumont, P.; Baber, G.P.; Shuto, I.; Sága, Milan; Okuno, Keisuke; Uo, H.

doi:10.1109/ptc.2003.1304464

Cited by 29 publications

(22 citation statements)

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“…To solve this error, many researchers have implemented synchronized sampling GPS time information at all terminals of the protected line [20][21][22][23]. This paper proposes a merger of current and voltage signal trip to get more accurate results or to fix these errors.…”

Section: Results and Analysismentioning

confidence: 99%

Line Differential Protection Modeling with Composite Current and Voltage Signal Comparison Method

2014

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Section: Results and Analysismentioning

confidence: 99%

Line Differential Protection Modeling with Composite Current and Voltage Signal Comparison Method

2014

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“…Major research works rely on phasor measurement unit (PMU) based wide area measurement system (WAMS) and wide area protection system (WAPS) [12][13][14][15][16][17]. WAMS and WAPS incorporated in backup protection systems were named as a wide-area backup protection (WABP) system [18][19][20][21][22][23]. P.K.…”

Section: Introductionmentioning

confidence: 99%

“…However, the methodologies proposed in [18,19] may require recalibration of existing relays in terms of pickup criterion sensitivity. Hall et.al [20] have proposed a wide-area distributed current differential scheme for WABP of the transmission line. However, the accuracy of the proposed scheme is affected by the power system unbalances.…”

Section: Introductionmentioning

confidence: 99%

“…Li et.al in their research work [21] have evaluated the performance of WABP under various power system disturbances. The research works proposed in [20,21] requires PMUs to be placed at all the buses. Sheng et.al in [22], have implemented numerical relays based on intelligent electronic devices in coordination with other relay agents for maintaining security-dependability balance.…”

Section: Introductionmentioning

confidence: 99%

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An adaptive supervised wide-area backup protection scheme for transmission lines protection

Mallikarjuna

Varma

Samir

et al. 2017

Prot Control Mod Power Syst

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Maloperation of conventional relays is becoming prevalent due to ever increase in complexity of conventional power grids. They are dominant during power system contingencies like power swing, load encroachment, voltage instability, unbalanced loading, etc. In these situations, adaptive supervised wide-area backup protection (ASWABP) plays a major role in enhancing the power system reliability. A balance between security and dependability of protection is essential to maintain the reliability. This paper proposes multi-phasor measurement units (MPMU) based ASWABP scheme that can function effectively during faults besides power system contingencies. MPMU is an extended version of Phasor Measurement Unit (PMU). It is an intelligent electronic device which estimates the synchronized predominant harmonic phasors (100Hz and 150Hz) along with the fundamental phasors (50Hz) of three phase voltages and currents with high precision. The proposed ASWABP scheme can detect the fault, identify the parent bus, determine the faulty branch and classify the faults using MPMU measurements at System Protection Center (SPC). Based on these MPMU measurements (received at phasor data concentrator (PDC) at SPC) the appropriate relays will be supervised to enhance the overall reliability of the power grid. Numerous case studies are conducted on WSCC-9 bus and IEEE-14 bus systems to illustrate the security and dependability attributes of proposed ASWABP scheme in MATLAB/Simulink environment. Also, comparative studies are performed with the existing conventional distance protection (Mho relays) for corroborating the superiority of the proposed scheme regarding security and dependability. Comparative studies have shown that the proposed scheme can be used as adaptive supervised wide-area backup protection of conventional distance protection.

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“…A number of problems related to high-speed communication and sampling synchronization for microprocessor-based differential relays or the accuracy and speed of fault detection and tripping have been identified, and attempts have been made to improve the performance of existing protection systems by employing GPS (Global Positioning System) synchronization [2] and novel fault detection algorithms or fault detection schemes [3]- [7].…”

Section: Introductionmentioning

confidence: 99%

Reliability of an all-optical differential current detection technique during environmental temperature perturbations

Fusiek¹,

Orr²,

Niewczas³

2014

IEEE SENSORS 2014 Proceedings

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The reliability of a novel, all-optical differential current protection scheme over varying environmental conditions is investigated in this paper. By monitoring the optical power reflected from two matched hybrid fiber Bragg grating current sensors and using a simple and low-cost optoelectronic threshold detector, a sub-cycle response to an increase in differential current can be achieved. A preliminary laboratory embodiment is constructed in order to emulate a practical deployment of the sensors and characterize the performance of the scheme when the sensors are at different temperatures. We demonstrate that even at a temperature difference of 20 °C between the sensors the system is capable of robust and fastacting fault detection

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New line current differential rehav using gps synchronization

Cited by 29 publications

References 1 publication

Line Differential Protection Modeling with Composite Current and Voltage Signal Comparison Method

Line Differential Protection Modeling with Composite Current and Voltage Signal Comparison Method

An adaptive supervised wide-area backup protection scheme for transmission lines protection

Reliability of an all-optical differential current detection technique during environmental temperature perturbations

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