A Novel Method of Combined DC and Harmonic Overcurrent Protection for Rectifier Converters of Monopolar HVDC Systems

Marvasti, Farzad Dehghan; Mirzaei, Ahmad

doi:10.1109/tpwrd.2017.2745758

Cited by 25 publications

(11 citation statements)

References 15 publications

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“…Generally, harmonic voltages and currents exist in power systems, and they have been used for various protective schemes in AC micro-grids and other power systems [29][30][31]. Harmonics are also part of HVDC voltage and current [1].…”

Section: Impedance Relations Required For the Proposed Protection Met...mentioning

confidence: 99%

Novel pilot protection scheme for line‐commutated converter high voltage direct current transmission lines based on behaviour of characteristic harmonic impedances

Marvasti

Mirzaei

Golshan

2020

IET Generation Trans & Dist

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Transient behaviour of high‐voltage direct current transmission lines under direct current faults can be easily affected by many factors, namely, fault location, fault resistance and transmission line length. In order to design a suitable protective scheme, the impact of these factors should be thoroughly investigated. An impedance‐based analysis is more suitable in evaluating high‐voltage direct current system behaviour during direct current line faults, and consequently, in comparison to similar harmonic current or voltage‐based schemes, a characteristic harmonic impedance‐based protection is more capable in fault detection. Therefore, this paper presents a novel pilot protection method for line‐commutated converter based high‐voltage direct current transmission lines, which relies on continuous monitoring of characteristic harmonic impedances. The proposed method can accurately calculate location of faults along the line, and estimate additional valuable information, such as fault resistance. The validity of the proposed method is evaluated by a wide range of fault scenarios using the CIGRE high‐voltage direct current benchmark model, simulated in PSCAD/EMTDC and codes written in MATLAB software environments. It will be shown that the proposed protection method sounds promising, and can serve as an excellent backup option in the case of primary protection malfunction.

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Section: Impedance Relations Required For the Proposed Protection Met...mentioning

confidence: 99%

Novel pilot protection scheme for line‐commutated converter high voltage direct current transmission lines based on behaviour of characteristic harmonic impedances

Marvasti

Mirzaei

Golshan

2020

IET Generation Trans & Dist

Self Cite

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“…The rectifier side resistance and inductance between the fault position and the current limiting reactor are not explained. Marvasti and Mirzaei (2018) suggested a method to identify the fault-based DC harmonic current components using FFT. The DC harmonic current components are very high and extracted from the converter transformer tertiary winding to protect the converter from its own fault.…”

Section: Introductionmentioning

confidence: 99%

A novel primary and backup relaying scheme considering internal and external faults in HVDC transmission lines

Swetapadma

Agarwal²,

Abdelaziz

et al. 2022

Front. Energy Res.

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Discrimination of different DC faults near a converter end of a DC section consisting of a filter, a smoothing reactor, and a transmission line is not an easy task. The faults occurring in the AC section can be easily distinguished, but the internal and near-side external faults in the DC section are very similar, and the relay may cause false tripping. This work proposes a method to distinguish external and internal faults occurring in the DC section. The inputs are the voltage signals at the start of the transmission line and the end of the converter filter. The difference in voltage signals is calculated and given to an intelligent controller to detect and discriminate the faults. The intelligent controller is designed using machine learning (ML) and deep learning (DL) techniques for fault detection. The long short-term memory (LSTM-) based relay gives better results than other ML methods. The proposed method can distinguish internal from external faults with 100% accuracy. Another advantage is that a primary relay is suggested that detects faults quickly within a fraction of milliseconds. Nevertheless, another advantage is that a backup relay has been designed in case the primary relay cannot operate. Results show that the LSTM-based protection scheme provides higher sensitivity and reliability under different operation modes than the conventional traveling wave-based relay.

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“…Large-scale long-distance integration of offshore wind power has become an increasing trend for harvesting electrical energy from wind power resources to meet the economic-benefit goals of clean energy generation [1][2]. Modular multilevel converterbased high voltage direct current (MMC-HVDC) transmission lines are widely used for this purpose for their distinct advantages such as independent active and reactive power control, fast controllability, black start, small footprint and ability to reverse power with low difficulty [3][4][5]. Despite the valuable advantages, MMC-HVDC systems have low faultride-through capabilities as the excessive fault currents can easily damage the power electronic devices inside the converters [6][7].…”

Section: Introductionmentioning

confidence: 99%

A Pilot Protection Scheme for HVDC Transmission Lines Based on Simultaneous Existence of Forward and Backward Voltage Travelling Waves

Marvasti

Mirzaei

Savaghebi

et al. 2022

2022 IEEE 13th International Symposium on Power Electronics for Distributed Generation Systems (PEDG)

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A pilot protection method that uses the forward and backward voltage travelling waves to identify DC line faults is proposed in this paper. This method is based on the idea that under internal faults forward and backward travelling waves are observed at both sides of the line within a specific time period. However, under external faults and depending on their direction, backward voltage travelling wave is not observed at one of the terminals. Therefore, a transient-based criterion based on simultaneous existence of line-mode forward and backward voltage travelling waves is proposed. It is shown that the proposed protection method is able to identify internal faults at any location along the line with fault resistance up to 1000 𝛀 with fast response and high sensitivity and selectivity. Performance evaluations of the proposed protection method is performed using a bipolar MMC-HVDC transmission line, simulated in PSCAD/EMTDC. Index terms-Forward and backward travelling waves, HVDC protection, pilot protection, travelling wave protection.

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A Novel Method of Combined DC and Harmonic Overcurrent Protection for Rectifier Converters of Monopolar HVDC Systems

Cited by 25 publications

References 15 publications

Novel pilot protection scheme for line‐commutated converter high voltage direct current transmission lines based on behaviour of characteristic harmonic impedances

Novel pilot protection scheme for line‐commutated converter high voltage direct current transmission lines based on behaviour of characteristic harmonic impedances

A novel primary and backup relaying scheme considering internal and external faults in HVDC transmission lines

A Pilot Protection Scheme for HVDC Transmission Lines Based on Simultaneous Existence of Forward and Backward Voltage Travelling Waves

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