Protection algorithm based on differential voltage measurement for MTDC grids

Descloux, J.; Raison, Bertrand; Curis, Jean-Baptiste

doi:10.1049/cp.2014.0010

Cited by 39 publications

(32 citation statements)

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“…The protection is tripped when the fault current path causes a differential in current [45] or large voltage differential between the two terminals [16]. These methods are very robust and provide inherent directionality, but rely on accurate time stamped data from both buses, and clearly will fail if the communication link fails.…”

Section: Voltage and Current Differentialmentioning

confidence: 99%

“…Due to the rapid increase in fault current and concomitant collapse in voltage, current or voltage derivative is a common form of traveling wave protection [15]. Other techniques include current differential, voltage differential and overcurrent [16]. In addition, various heuristic and empirical methods have been used that do not easily fit into traditional protection classifications, such as waveform similarity [17].…”

Section: Introductionmentioning

confidence: 99%

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Design of protection schemes for multi-terminal HVDC systems

Blond

Bertho

Coury

et al. 2016

Renewable and Sustainable Energy Reviews

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Section: Voltage and Current Differentialmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Design of protection schemes for multi-terminal HVDC systems

Blond

Bertho

Coury

et al. 2016

Renewable and Sustainable Energy Reviews

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“…The existing relays include derivatives [6], voltage and current differential [7], S. Pirooz Azad is with the Department of Electrical and Computer Engineering, University of Alberta, Edmonton, AB, Canada and D. Van Hertem is with the Electrical Engineering Department of KU Leuven, Leuven, Belgium (e-mail: spazad@ualberta.ca; dirk.vanhertem@esat.kuleuven.be) [8], overcurrent [9], [10] and traveling wave [11]. Derivative relays use the rate of rise of current or voltage measurement for fault detection and their speed relies on the accuracy of the derivative signals and the time required to mitigate the high frequency effects in the waveforms.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, these relaying algorithms based on voltage measurements require both current and voltage sensors and are less economically viable compared to algorithms relying only on current measurements. Those algorithms relying on only voltage measurements require additional voltage sensors at the two ends of all current limiting inductors to detect bus faults [8], [13]. Newly-developed distance relays for DC protection also require two voltage divider measurements [14] or both current and voltage measurements [15] to detect faults on transmission lines.…”

Section: Introductionmentioning

confidence: 99%

A Fast Local Bus Current-Based Primary Relaying Algorithm for HVDC Grids

Azad

Hertem

2017

IEEE Trans. Power Delivery

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Abstract-This paper proposes a fast, selective, reliable and local bus primary relaying algorithm for high voltage direct current (HVDC) grids. The proposed relaying algorithm only uses measurements obtained from current sensors to detect faults and identify their locations. This algorithm is local and requires only communication at the bus level rather than system level. Furthermore, the algorithm is not sensitive to system configuration and operating point and can be employed during line or converter outages with limited re-tuning and adjustments.The proposed algorithm is applied to a four-terminal HVDC grid. Study results show that the proposed algorithm i) detects faults on both transmission lines and DC buses, ii) identifies the faulted bus or transmission line, iii) requires insignificant computation capacity, iv) distinguishes between faults and other system transients to prevent erroneous circuit breaker trips, and v) is not sensitive to measurement noise.

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“…Recent work has addressed the use of selective algorithms based on current or voltage derivatives [10]- [12]. However, derivative methods have been tested in MTDC grids composed by cables only.…”

Section: Introductionmentioning

confidence: 99%

Protection strategy for multi-terminal DC networks with fault current blocking capability of converters

Dantas

Liang

Ugalde‐Loo

et al. 2017

13th IET International Conference on AC and DC Power Transmission (ACDC 2017)

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High voltage dc networks are a promising technology to flexibly transmit power over long distances. However, dc grid protection is still a major challenge. DC fault clearance can be mainly achieved with three devices. These are ac circuit breakers (ACCBs), dc circuit breakers (DCCBs) and converters with fault current blocking (FB) capability. In spite of their great operational advantages, FB converters have attracted less attention than ACCBs or DCCBs in dc protection research. To bridge this gap, this paper investigates a protection strategy for a multi-terminal dc (MTDC) network equipped with FB converters and fast dc disconnectors. A novel minimum opening protection approach fully based on local data is proposed. Digital simulations are carried out using PSCAD/EMTDC. Simulation results show that only the two fast dc disconnectors placed in a faulty link operate following a dc fault. These results have verified proposed ideas for the protection of MTDC networks.

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Protection algorithm based on differential voltage measurement for MTDC grids

Cited by 39 publications

References 0 publications

Design of protection schemes for multi-terminal HVDC systems

Design of protection schemes for multi-terminal HVDC systems

A Fast Local Bus Current-Based Primary Relaying Algorithm for HVDC Grids

Protection strategy for multi-terminal DC networks with fault current blocking capability of converters

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