A Novel Traveling-Wave-Based Main Protection Scheme for $\pm $800 kV UHVDC Bipolar Transmission Lines

Kong, Fei; Hao, Zhiguo; Zhang, Baohui

doi:10.1109/tpwrd.2016.2571438

Cited by 78 publications

(42 citation statements)

References 9 publications

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“…Several algorithms which use quantities in the phase domain are reported for the protection of LCC dc systems [15][16][17][18][19][20]. The algorithms reported in [15][16][17][18] are similar in nature, where the dc voltage and its derivative are compared against thresholds and possibly complemented by a threshold on the current derivative.…”

Section: Phase Domainmentioning

confidence: 99%

“…The algorithms proposed in [19,20] use voltage measurements to distinguish between faulted and healthy poles by assessing whether the pole voltage has a transient nature (healthy pole) or not (faulted pole). The time windows to make a decision on the faulted pole are 3 ms in [19] and 10 ms in [20].…”

Section: Phase Domainmentioning

confidence: 99%

“…In the symmetric overhead line system of Fig. 1c, the transformation matrix is frequency independent and is given in (19). In this system, the aerial mode (mode 1) exhibits low dependency on high frequencies, whereas the ground return mode (mode 2) depends on frequency significantly (Fig.…”

Section: Symmetric Overhead Line Systemsmentioning

confidence: 99%

See 2 more Smart Citations

HVDC grid protection algorithm design in phase and modal domains

Leterme¹,

Azad

Hertem³

2018

IET Renewable Power Generation

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To meet the required operation speed for protection of meshed voltage source converter (VSC) high voltage direct current (HVDC) grids, traveling wave-based algorithms operating in the sub-millisecond time-frame can be used. The domain in which these algorithms operate, i.e., modal or phase, determines their performance in fault discrimination, fault type classification and faulted pole selection. In the recent literature, high-speed algorithms have been proposed for various VSC HVDC grid configurations and transmission line types; yet the choice of domain has received insufficient attention. This paper offers recommendations for the choice of domain for protection algorithm design of HVDC overhead line or cable systems in symmetric monopolar and bipolar configurations. The theoretical analysis of this paper, which is based on fundamental wave propagation theory, indicates that the preferred domain for protection algorithms for cable and overhead line systems are the phase and modal, respectively. Furthermore, the paper provides comprehensive guidelines to construct detection functions for both configurations and discusses the errors introduced by approximations. Finally, study results from a bipolar overhead line test system demonstrate the advantages of modal over phase domain for fast fault discrimination and classification and illustrate practical problems associated with non-ideal detection functions.

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Section: Phase Domainmentioning

confidence: 99%

Section: Phase Domainmentioning

confidence: 99%

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HVDC grid protection algorithm design in phase and modal domains

Leterme¹,

Azad

Hertem³

2018

IET Renewable Power Generation

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“…Directional relays such as [16] are widely used to improve fault discrimination in AC grids. The most common method of detecting the direction of a fault is comparison of the magnitudes of forward and backward waves which are calculated using both voltage and current measurements [17,18]. Current derivatives have been used to discriminate forward and backward faults in [19].…”

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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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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“…UHVDC system fulfills an ever increasing important role in long distance and large capacity power transmission due to its large capacity, small power loss and low occupation of land [1][2][3]. Since 2006, four UHVDC projects have been constructed and put into operation in China, and in 2015, Eastern Inner Mongolia power company of China State Grid started the construction of 'two ACs and three DCs' UHV systems, among which the Zhalute-Qingzhou (Z-Q for short hereafter) UHVDC project starts from Zhalute in Eastern Inner Mongolia, via Inner Mongolia, Hebei, Tianjin and Shandong province, and ends at Qiongzhou in Shandong.…”

Section: Introductionmentioning

confidence: 99%

Study of the Conducted Electromagnetic Interference in the Converter Station of an Uhvdc Transmission System

Jian¹,

Wang²,

Luo³

et al. 2017

PIER B

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Abstract-The Conducted Electromagnetic Interference (CEI) characteristics in the primary circuit and at the ports of the secondary devices of the converter station of a UHVDC transmission system are researched comprehensively and systematically in this paper, by taking the Zhalute-Qingzhou ±800 kV/10000 MW UHVDC project in East Inner Mongolia of China as an example. The primary circuit equipment parameters of the target system are designed systematically at first, and the overall broadband equivalent model of the main circuit of the UHVDC system, which is composed of converter valve, converter transformer, filter banks and smoothing reactor, is developed. The CEI characteristics in the primary circuit under various conditions of the UHVDC system are analyzed based on the simulations carried out on the built BEC, and the influences of several primary circuit elements on the propagation of the CEI characteristics are researched. To improve the accuracy of the analysis of the CEI characteristics in the secondary device circuit, accurate BECs of the Capacitor Voltage Transformer (CVT), Current Transformer (CT) and secondary signal cable are established. The CEI characteristics at the ports of secondary devices under different operation modes are studied, and the influences of the cable length and burden rate on the CEI characteristics are analyzed. This paper provides a comprehensive and thorough understanding of the CEI characteristics of an UHVDC system.

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A Novel Traveling-Wave-Based Main Protection Scheme for $\pm $800 kV UHVDC Bipolar Transmission Lines

Cited by 78 publications

References 9 publications

HVDC grid protection algorithm design in phase and modal domains

HVDC grid protection algorithm design in phase and modal domains

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

Study of the Conducted Electromagnetic Interference in the Converter Station of an Uhvdc Transmission System

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