A novel traveling-wave-based directional protection scheme for MTDC grid with inductive DC terminal

Li, Yan; Gong, Yanfeng; Jiang, Bin

doi:10.1016/j.epsr.2017.12.010

Cited by 49 publications

(23 citation statements)

References 22 publications

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“…Unit protection methods offer inherent selectivity as the protection zones are well defined. Protection systems have been designed based on the current differential and the directional protection methods [10], [17]. However, these protection systems rely on a communication link in order to obtain signal measurements from the other end of the line.…”

Section: Summary Of Detection Methods and Discussionmentioning

confidence: 99%

Review and Evaluation of the State of the Art of DC Fault Detection for HVDC Grids

Psaras

Emhemed

Adam

et al. 2018

2018 53rd International Universities Power Engineering Conference (UPEC)

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This paper reviews the state of the art of DC fault discrimination and detection methods of HVDC grids, and summarises the underlying principles and the characteristics of each method. To minimize HVDC grid disturbance and power transfer interruption due to DC faults, it is critically important to have protection schemes that can detect, discriminate and isolate DC faults at high speeds with full selectivity. On this basis, this paper lists the advantages and disadvantages of the most promising fault detection methods, with the aim of articulating the future directions of HVDC protection systems. From the qualitative comparison of relative merits, the initial recommendations on HVDC grid protection are presented. Moreover, a comprehensive quantitative assessments of different fault detection methods discussed above are carried out on a generic 4-terminal meshed HVDC grid, which is modelled in PSCAD environment. The presented simulation results identify that the voltage derivative and wavelet transform are the most promising methods for DC fault detection and discrimination.

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Section: Summary Of Detection Methods and Discussionmentioning

confidence: 99%

Review and Evaluation of the State of the Art of DC Fault Detection for HVDC Grids

Psaras

Emhemed

Adam

et al. 2018

2018 53rd International Universities Power Engineering Conference (UPEC)

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“…The first one is inductor free-wheeling circuit as is shown in Figure 3a The pole-to-pole fault is the most serious fault in the DC side of MMC-HVDC. The fault process can be divided into two stages according to whether the converter is blocked [18].…”

Section: Short-circuit Current Calculation Methodsmentioning

confidence: 99%

A Novel Overcurrent Suppression Strategy during Reclosing Process of MMC-HVDC

Jiang

Gong

2019

Applied Sciences

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A modular multilevel converter based high-voltage DC (MMC-HVDC) system has been the most promising topology for HVDC. A reclosing scheme is usually configured because temporary faults often occur on transmission lines especially when overhead lines are used, which often brings about an overcurrent problem. In this paper, a new fault current limiter (FCL) based on reclosing current limiting resistance (RCLR) is proposed to solve the overcurrent problem during the reclosing process. Firstly, a mesh current method (MCM) based short-circuit current calculation method is newly proposed to solve the fault current calculation of a loop MMC-HVDC grid. Then the method to calculate the RCLR is proposed based on the arm current to limit the arm currents to a specified value during the reclosing process. Finally, a three-terminal loop MMC-HVDC test grid is constructed in the widely used electromagnetic transient simulation software PSCAD/EMTDC and the simulations prove the effectiveness of the proposed strategy.

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“…We also deduce, at the fault point, that the voltage of the fictitious superimposed source and the steady-state voltage are equal in magnitude but of opposite sign. In fact, noting that ∆v F (t) = ∆v(x F , t) and that we haveṽ F (t) =ṽ(x F , t) = 0, we obtain then from equation 12the following relation : Considering that the superimposed quantities are directly related to to the fault, they should possess properties in relation to the directionality of the fault [19], [20]. In order to exhibit these properties, let's take for instance, as shown in Figure 6, a transmission system composed of two lines in which a fault is generated at point F at t F = 0.…”

Section: Msmga Based Ultra-high-speed Directional Protection (Uhsdp)mentioning

confidence: 99%

Multi-scale morphological gradient algorithm based ultra-high-speed directional transmission line protection for internal and external fault discrimination

Khoudry¹,

Belfqih²,

Ouaderhman³

et al. 2019

IJECE

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<p>This paper introduces an ultra-high-speed directional transmission line protection scheme based on multi-scale morphological gradient algorithm (MSMGA). The directional protection scheme sets down the rules for determining the fault position in relation to the relaying point. The MSMGA is used to extract the fault-induced transient characteristics contained in the voltage and current signals. The associated signals are formed from these transient characteristics and the polarity of their local modulus maxima allow the discrimination between internal and external faults.</p>

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A novel traveling-wave-based directional protection scheme for MTDC grid with inductive DC terminal

Cited by 49 publications

References 22 publications

Review and Evaluation of the State of the Art of DC Fault Detection for HVDC Grids

Review and Evaluation of the State of the Art of DC Fault Detection for HVDC Grids

A Novel Overcurrent Suppression Strategy during Reclosing Process of MMC-HVDC

Multi-scale morphological gradient algorithm based ultra-high-speed directional transmission line protection for internal and external fault discrimination

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