Study on the dynamic performance characteristics of HVDC control and protections for the HVDC line fault

Li, Aimin; Cai, Zexiang; Sun, Qizhen; Li, Xiaohua; Dayong, Ren; Yang, Zhiping

doi:10.1109/pes.2009.5275974

Cited by 86 publications

(69 citation statements)

References 5 publications

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“…To improve the security, a fault is declared only if the maximum dv/dt value observed at the bus is greater than Setting_B. This fault detection logic can be supervised by an under voltage element to further improve the security as in [19,22]. Drop of bus voltage below VB_Setting confirms the occurrence of a bus fault.…”

Section: Rocov Comparison Based Bus Fault Detectionmentioning

confidence: 99%

“…As no communication delay is involved, the local measurement based directional protection scheme can detect faults well before the fault currents reach the maximum breakable current. As shown in this paper, discrimination of high resistance faults at the far end of a long cable or transmission line is challenging [22]. To overcome such situations, a double ended ROCOV based directional comparison scheme is also presented.…”

Section: Introductionmentioning

confidence: 99%

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Application of new directional logic to improve DC side fault discrimination for high resistance faults in HVDC grids

Haleem

Rajapakse

2017

J. Mod. Power Syst. Clean Energy

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This paper proposes a simple and fast way to determine the direction of a fault in a multi-terminal high voltage direct current (HVDC) grid by comparing the rate of change of voltage (ROCOV) values at either side of the di/dt limiting inductors at the line terminals. A local measurement based secure and fast protection method is implemented by supervising a basic ROCOV relay with a directional element. This directional information is also used to develop a slower communication based DC line protection scheme for detecting high resistance faults. The proposed protection scheme is applied to a multi-level modular converter based three-terminal HVDC grid and its security and sensitivity are evaluated through electromagnetic transient simulations. A methodology to set the protection thresholds considering the constraints imposed by the breaker technology and communication delays is also presented. With properly designed di/dt limiting inductors, the ability of clearing any DC transmission system fault before fault currents exceeds a given breaker capacity is demonstrated.

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Section: Rocov Comparison Based Bus Fault Detectionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Application of new directional logic to improve DC side fault discrimination for high resistance faults in HVDC grids

Haleem

Rajapakse

2017

J. Mod. Power Syst. Clean Energy

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“…The failure rate of direct current transmission lines has continuously increased in recent years because of external damage, lightning and environmental pollution. Failure statistics on Tianshengqiao-Guangzhou HVDC project (China, 1800 MW, 6500 kV) showed that transmission line faults were 50% of the total system faults from 2001 to 2007 (Li et al, 2009). To control and protect HVDC transmission lines, direct current measurement equipment must be installed in converter stations to provide reliable and accurate measured values (Xing et al, 2011;Yu et al, 2002).…”

Section: Introductionmentioning

confidence: 99%

A prototype optical fibre direct current sensor for HVDC system

Yan

Xing

2015

Transactions of the Institute of Measurement and Control

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Direct current of the transmission line is the key parameter for the control and protection of high-voltage direct current (HVDC) transmission systems. In this paper, a novel optically powered direct current sensor for HVDC measurement is presented. The direct current is first detected via a precise direct shunt, and then converted to an optical pulse signal by an analogue voltage processing unit, which is designed using low power consumption technology. Subsequently, the optical pulse signal is transmitted to the control room via an optical fibre system and recovered by a ground-located optical pulse processing unit. Moreover, part count method and part stress analysis method are used to predict the failure rate of the power supply and conversion circuit. Tests in the China National High Voltage Metering Station and the laboratory show that the proposed sensor achieved an accuracy within to 60.5% from 300 to 3000 A, and the power consumption of analogue voltage processing unit is less than 46 mW on the condition of maximum 8k sampling frequency.

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“…So, it is very necessary to find the location of the fault accurately and employing protective measures for clearance of the fault. Various methods are employed for the protection of HVDC transmission lines [3]- [7]. Travelling wave protection is used as a primary protection and is unable to detect the line faults with high transition resistance.…”

Section: Introductionmentioning

confidence: 99%

“…Under voltage protection is also not reliable for high impedance faults. Currently travelling wave based method [3] is used for locating the fault in line but it is unable to detect the wave head when the fault has occurred with high transition resistance. Distributed parameter model technique [2], [8] is also used, but it neglect the effect of frequency dependent nature of the parameters, as during initial period of the fault plentiful harmonics are present in the transient voltages and current and using only constant parameters for the calculation of voltage and current at the setting point will lead to inaccuracy in the calculation of location of fault.…”

Section: Introductionmentioning

confidence: 99%

Distance Protection of HVDC Transmission Line With Novel Fault Location Technique

Nale¹,

Babu

India³

2014

IJRET

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Study on the dynamic performance characteristics of HVDC control and protections for the HVDC line fault

Cited by 86 publications

References 5 publications

Application of new directional logic to improve DC side fault discrimination for high resistance faults in HVDC grids

Application of new directional logic to improve DC side fault discrimination for high resistance faults in HVDC grids

A prototype optical fibre direct current sensor for HVDC system

Distance Protection of HVDC Transmission Line With Novel Fault Location Technique

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