A novel pole-to-ground fault detection algorithm for meshed HVDC grids with half-bridge MMC converters and full recourse to DC circuit breakers

Auran, Geoffrey; Raison, Bertrand; Descloux, J.; Nguefeu, Samuel

doi:10.1049/cp.2016.0081

Cited by 7 publications

(2 citation statements)

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“…A faulty behavior is generally associated with high variation rates in both current and voltage. Various measurements-based methods using thresholds on voltage and their derivatives [4] or current and their derivatives [5], or both , have been proposed. They all benefit from costly inductances placed at the end of each line, between the relay and the bus-bar, see Figure 1.…”

Section: Introductionmentioning

confidence: 99%

A novel single-ended fault identification algorithm for full selective protection strategy

Kieffer¹,

Raison²

2020

15th International Conference on Developments in Power System Protection (DPSP 2020)

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While more and more HVDC point-to-point connections are initiated worldwide, the emergence of multi-terminal grids still faces important hurdles among which the protection is seen as particularly challenging. We propose a parametric single-ended fault identification algorithm to be used in fullyselective fault-clearing strategies. Such strategies are preferential for meshed grids as they limit the impact of the fault. The method is able to determine whether the line monitored by a relay is faulty or not using very few local measurements, making ultra-fast fault identification possible. Contrary to most existing approaches, extra inductances are not required to distinguish between faults occurring on the protected line and elsewhere. When a fault is suspected, the proposed algorithm estimates the parameters that characterize the fault, namely the fault distance and impedance. The estimation process uses a parametric model describing the voltage and current evolution just after the fault occurrence based on the fault parameters.The identification of the faulty line is then based on the size of the confidence region of the estimated fault parameters. Use-cases and performances of the algorithm for a fournode meshed grid are studied using Electro-Magnetic Transient (EMT) simulations.

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Section: Introductionmentioning

confidence: 99%

A novel single-ended fault identification algorithm for full selective protection strategy

Kieffer¹,

Raison²

2020

15th International Conference on Developments in Power System Protection (DPSP 2020)

Self Cite

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“…Unit protection algorithms use differential current, travelling wave, or directional information to distinguish the faulted line [3–5]. These data need to be exchanged between both ends of line.…”

Section: Introductionmentioning

confidence: 99%

Voltage pole‐wave protection scheme for multi‐terminal DC grid

Xie

Zou

Gao

et al. 2018

J. eng.

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Protection Scheme of Multi-terminal Flexible DC Distribution Network Based on Current-Limiting Inductor Voltage

Shangguan

Qin

Wang

et al. 2019

IOP Conf. Ser.: Earth Environ. Sci.

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The rapid development of power electronic devices has promoted the rapid development of multi-terminal flexible DC distribution networks, indicating the direction of DC technology and urban power distribution systems. However, there are several technical problems in multi-terminal flexible DC distribution network that still need to be solved. In relay protection, the main difficulty faced by DC distribution network is the rapid and reliable identification of DC faults. This paper proposes a multi-terminal flexible DC distribution network protection scheme based on current-limiting inductor. First, the system configuration of the multi-terminal flexible DC distribution network is introduced. Then, the DC-side fault characteristic of the flexible DC distribution network are analysed. Based on this, a protection scheme based on current-limiting inductor voltage is proposed. Next, a complete protection scheme is designed. Finally, the proposed protection scheme is verified by real time digital simulator (RTDS). The simulation results show that the scheme is not affected by the fault resistance and fault distance.

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A novel pole-to-ground fault detection algorithm for meshed HVDC grids with half-bridge MMC converters and full recourse to DC circuit breakers

Cited by 7 publications

References 0 publications

A novel single-ended fault identification algorithm for full selective protection strategy

A novel single-ended fault identification algorithm for full selective protection strategy

Voltage pole‐wave protection scheme for multi‐terminal DC grid

Protection Scheme of Multi-terminal Flexible DC Distribution Network Based on Current-Limiting Inductor Voltage

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