Designing for High-Voltage dc Grid Protection: Fault Clearing Strategies and Protection Algorithms

Leterme, Willem; Jahn, Ilka; Ruffing, Philipp; Sharifabadi, Kamran; Hertem, Dirk Van

doi:10.1109/mpe.2019.2897188

Cited by 45 publications

(28 citation statements)

References 2 publications

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“…In addition, the shutdown of a big zone of the HVDC grid could affect the AC grid stability. Therefore, the impact of fault conditions on the system during the fault-clearing and post-fault recovery stages will vary according to the adopted fault-clearing strategy (Leterme et al, 2019). They are classified into non-selective, partially-selective or full-selective fault-clearing strategies.…”

Section: Fault-clearing Strategiesmentioning

confidence: 99%

Challenges for Protection of Future HVDC Grids

et al. 2020

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Nowadays, High Voltage Direct Current (HVDC) transmissions are gaining relevance in long distance and renewable energy integration projects over the conventional Alternating Current (AC) transmissions due to several advantages as improved flexibility and independent active and reactive power controllability. Despite that, the high currents and voltage collapses generated by fault conditions in HVDC systems imply some unresolved technical challenges regarding the detection, location and clearance of faults. Faults have to be cleared in a very short time range in order to minimize their impact on the system. For this objective, very fast protection algorithms and reliable HVDC circuit breakers are required. This paper focuses on the technical challenges and limitations of HVDC protection systems. This way, protection requirements and different types of measurement devices are considered. Protection algorithms are classified into local-measurement-based and communication-based, highlighting the most important characteristics. In addition, the different technologies of HVDC circuit breakers are compared. Finally, the characteristics and effects of the different available fault-clearing strategies are presented.

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Section: Fault-clearing Strategiesmentioning

confidence: 99%

Challenges for Protection of Future HVDC Grids

et al. 2020

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“…Additionally, since there is no zero crossing in DC grids [17], HVDC CBs that can create this condition and that have the capability of interrupting high current [18] and dissipating the energy stored in the grid during fault conditions [19] are needed. Nowadays, the most common HVDC CB types are mechanical, solid-state and hybrid CBs, they have operation times of 5-10 ms, 1 ms and 2-5 ms, respectively [1], [6].…”

Section: Introductionmentioning

confidence: 99%

“…Likewise, a fault clearing strategy must be selected according to the protection equipment implemented in the system. This determines the severity of the fault impact on the HVDC and AC systems [17], [21]. A non-selective strategy is based on shutting down the entire system after fault detection by AC CBs.…”

Section: Introductionmentioning

confidence: 99%

Fault detection based on ROCOV in a multi-terminal HVDC grid

Pérez-Molina¹,

Eguia²,

Larruskain-Eskobal³

et al. 2024

RE&PQJ

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Protection of a meshed VSC-HVDC grid is a challenge due to the behaviour of DC current and voltage signals during fault conditions. Protection systems must operate in a very short time range. Since fault detection should be very fast, local measurement based algorithms are mostly used; communication based algorithms lack the needed speed as a result of the communication time delay. This way, a ROCOV algorithm is proposed in this paper. This algorithm is analysed for different fault conditions.

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“…The core of the HVDC protection system evaluation is the determination of HVDC protection equipment's operation status. However, current HVDC protection system evaluation focuses on operation management, such as punching cards and data reports [1]. Limited data analysis, simple indicator check, and subjective judgments make it challenging to pinpoint the HVDC protection equipment's operation problems.…”

Section: Introductionmentioning

confidence: 99%

An Evaluation System for HVDC Protection Systems by a Novel Indicator Framework and a Self-Learning Combination Method

Zhu

et al. 2020

IEEE Access

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High voltage direct current (HVDC) is expected to bring forth large capacity, long transmission distance, and asynchronous grid interconnection. To quantitatively analyze the protection systems of HVDC, an evaluation system is proposed with a novel indicator framework and an innovative weighting method for the assessment of HVDC operating status. The novel indicator framework includes 31 indicators from the perspectives of reliability, fault monitoring, operational maintenance, control efficiency, and system redundancy. A self-learning interval analytic hierarchical process is used to decide the weights of the indicators based on the maximum entropy method. The optimal subjective weights of the indicators can be obtained by the self-learning process, considering not only the fuzziness of single expert scoring but also the difference between experts' weights. A real HVDC project in Hubei province, China, was studied to verify the effectiveness of the proposed evaluation system. INDEX TERMS High voltage direct current, self-learning, evaluation system, interval analytic hierarchy process.

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Designing for High-Voltage dc Grid Protection: Fault Clearing Strategies and Protection Algorithms

Cited by 45 publications

References 2 publications

Challenges for Protection of Future HVDC Grids

Challenges for Protection of Future HVDC Grids

Fault detection based on ROCOV in a multi-terminal HVDC grid

An Evaluation System for HVDC Protection Systems by a Novel Indicator Framework and a Self-Learning Combination Method

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