Current differential relay characteristic for bipolar HVDC transmission line fault detection

Saber, Ahmed; Zeineldin, H. H.; EL-Fouly, Tarek H. M.; Al‐Durra, Ahmed

doi:10.1049/iet-gtd.2020.0556

Cited by 15 publications

(9 citation statements)

References 22 publications

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“… In [14, 15], pilot protections based on transient energy ratio of line boundary are proposed to detect high fault resistances. However, the voltage and current data at the measuring points (a, b, m and n) at the valve and line sides at both line ends are required to apply both schemes [16]. Another method to achieve fault detection is utilizing the voltage of smoothing reactor of the line boundary [17].…”

Section: Introductionmentioning

confidence: 99%

Calculated DC resistance‐based pilot protection scheme for bipolar high‐voltage direct current transmission lines

Yang

Tai

Liu

et al. 2022

IET Generation Trans & Dist

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The current differential protection for high‐voltage direct current (HVDC) transmission lines has low reliability due to the distributed capacitive current and time delay. This paper proposes a pilot directional protection, which is based on the calculated DC resistance (CDCR) at both ends of DC lines. The characteristics of superimposed components and CDCR are analysed using the superposition theorem. The magnitude of CDCR is equal to the resistance of the converter for a forward internal fault, while it is equal to the sum of the line's DC resistance and the converter's resistance for a reverse fault. CDCR is a useful characteristic to construct the protection scheme as the resistance of DC line is significantly greater than that of the converter. Detailed simulation tests carried out on PSCAD/EMTDC under different fault conditions show that the proposed scheme is able to identify internal and external faults accurately.

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Section: Introductionmentioning

confidence: 99%

Calculated DC resistance‐based pilot protection scheme for bipolar high‐voltage direct current transmission lines

Yang

Tai

Liu

et al. 2022

IET Generation Trans & Dist

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“…For example, the EGAT-TNB HVDC transmission system, which increases the stability of the network in Southern ailand and connects the ASEAN network in the future project of "ASEAN Power Grid," was studied using the ATP program to control powers. It was also used to analyse fault events [48][49][50][51][52][53], fault signals [54][55][56], and fault location [57]. e power flow of this system was analysed using dynamic simulation to validate the stability and reliability of the operation of the HVDC transmission line [58][59][60][61][62][63].…”

Section: Introductionmentioning

confidence: 99%

Effects of Conditional Changes on High-Voltage Direct Current Transmission Line Characteristic

Pothisarn

Ngaopitakkul

Leelajindakrairerk

et al. 2022

Journal of Electrical and Computer Engineering

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The high-voltage direct current (HVDC) transmission system, which links the Gurun Substation of the National Electric Authority of Malaysia (Tenaga Nasional Berhad, TNB) with the Khlong Ngae Station of the Electricity Generating Authority of Thailand (EGAT), has been extensively researched to achieve the highest quality because it is the largest of its kind in Thailand, and there is a plant to expand its transmission power. However, the impact on the whole system is under-researched. To study and develop this system, the HVDC transmission line is modelled with the MATLAB/Simulink program and a laboratory setup to investigate the effect of transmission line distance, load power, and voltage on power loss, voltage drop, and waveform. The HVDC transmission line parameters are calculated from the actual transmission line parameters and converted to the simulation model parameters using the per-unit method. The model is verified and tested by the simulation program before creating the experimental setup. The simulation and experimental results demonstrate the effects of changing system conditions via the three aspects. All the three conditions directly affect the HVDC transmission line; nevertheless, they affect each aspect differently.

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Section: Introductionmentioning

confidence: 99%

“…In addition, other pilot backup protection schemes are proposed in [22][23][24][25][26] to mitigate the effect of distributed capacitive currents. The methods in [22,23] adopt stationary waveform transform to eliminate noise and introduce protection schemes based on synchronized transient currents characteristics to detect the fault and the faulted pole. Although these schemes are capable to detect high-impedance faults within 10 ms, the length of the data window should be selected in proportion to the wave propagation time along the line to prevent maloperation.…”

Section: Introductionmentioning

confidence: 99%

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Pilot protection method for bipolar CSC‐HVDC transmission lines based on transient currents behaviour

Khaleghi-Abbasabadi

Mehrabi‐Kooshki

Mirhosseini

et al. 2022

IET Generation Trans & Dist

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The unnecessary prolonged operating time of conventional current differential protection under high-impedance DC line faults is an important issue affecting the continuity of power supply. This issue originates from the extreme differential current fluctuation under fault conditions. This paper presents a reinforced pilot protection algorithm for bipolar CSC-HVDC transmission lines to achieve a selective and sensitive performance without sacrificing the protection speed. In this regard, the characteristics of low-frequency transient modal currents are investigated along with the impact of discharging capacitive current under various fault conditions. Based on the features arising from line-mode compensated currents, it is shown that their opposite changing directions induces a positive high-value differential current during DC line faults, whereas the compensated line-mode currents follow the same changing trend under external faults. After detecting internal faults, the faulted pole is detected by utilizing the polarity of ground-mode components. Compared to other pilot protections, the proposed protection provides more reliability, selectivity, and sensitivity with high operating speed. Moreover, it has robust performance against discharging capacitive current, asynchronous measurement, line parameters uncertainty, and noise. Various simulation tests are performed on a ±500 kV HVDC test system in PSCAD to verify effectiveness of the proposed protection.

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Current differential relay characteristic for bipolar HVDC transmission line fault detection

Cited by 15 publications

References 22 publications

Calculated DC resistance‐based pilot protection scheme for bipolar high‐voltage direct current transmission lines

Calculated DC resistance‐based pilot protection scheme for bipolar high‐voltage direct current transmission lines

Effects of Conditional Changes on High-Voltage Direct Current Transmission Line Characteristic

Pilot protection method for bipolar CSC‐HVDC transmission lines based on transient currents behaviour

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