Direct-Current Vacuum Circuit Breaker With Superconducting Fault-Current Limiter

Yang, Kun; Yi, Yang; Junaid, Muhammad; Liu, Siyuan; Liu, Zhiyuan; Wang, Jianhua

doi:10.1109/tasc.2017.2767500

Cited by 24 publications

(15 citation statements)

References 21 publications

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“…Considering huge volume and weight of existing DCCBs for DC grids, a current limiting module within a hybrid DCCB [18,19] may lead to an unexpected increase of volume and weight, high complexity in operation, and difficulties in maintenance. It is easier to design a separate FCL to a DCCB for industrial installation.…”

Section: Nomenclaturementioning

confidence: 99%

“…• The current flow branch (CFB). It is composed of an ultrafast disconnector (UFD) and a load commutation switch (LCS), which is often used in the hybrid HVDC breakers [19]. The LCS is formed by IGBT valve T1 and diode valve D.…”

Section: Topology and Basic Principle Of The Proposed Fclmentioning

confidence: 99%

“…In ∆t2, ignoring the energy dissipation of the resistor, the energy conservation equation is as follows (19) When the arrester starts to consume energy, T2b is turned on and the FCL inductor is bypassed, then Le1=Ldc+Lline. If no action is taken and the inductor still exists in the circuit, then Le2=Ldc+Lline.…”

Section: B Approximate Calculation Of Reduced Dccb Energy Dissipatiomentioning

confidence: 99%

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A Thyristor-Based DC Fault Current Limiter With Inductor Inserting–Bypassing Capability

Zhao

Han

et al. 2019

IEEE J. Emerg. Sel. Topics Power Electron.

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Section: Nomenclaturementioning

confidence: 99%

Section: Topology and Basic Principle Of The Proposed Fclmentioning

confidence: 99%

Section: B Approximate Calculation Of Reduced Dccb Energy Dissipatiomentioning

confidence: 99%

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A Thyristor-Based DC Fault Current Limiter With Inductor Inserting–Bypassing Capability

Zhao

Han

et al. 2019

IEEE J. Emerg. Sel. Topics Power Electron.

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“…Velocity represents the speed of movement and position represents the direction of movement. Generally, in the N-dimensional solution space, for m initial particles, the updates of their velocities and positions can be expressed by Equations (20) and (21) in the optimization process.…”

Section: The Optimization Workflow Based On Psomentioning

confidence: 99%

“…The emergence of superconducting fault current limiter (SFCL) provides a good solution for solving DC short-circuit fault in a VSC-based DC system, which can improve the fault ride through capability and robustness of VSC-based DC systems [18,19] and assist DCCBs to interrupt [20][21][22]. According to current limiting components, DC SFCLs can be divided into a resistive type, an inductive type and a hybrid type [23].…”

mentioning

confidence: 99%

Parameter Matching and Optimization of a Hybrid Type DC SFCL Considering the Transient Characteristics of VSC-Based DC Systems

et al. 2019

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Voltage source converter-based (VSC-based) DC systems play an important role in connecting large-scale renewable energy and distributed energy, but they are vulnerable to DC short-circuit fault and lacks mature protection devices and appropriate protection strategies. Therefore, a hybrid type DC superconducting fault current limiter (H-SFCL) is proposed and the current limiting mechanism of the SFCL is analyzed. According to the requirements and strategies for protection, several different effective parameter matching and optimization methods of the H-SFCL are proposed by combining optimization algorithms and two short-circuit transient calculation models of VSC-based DC systems. The optimization methods proposed in this paper are compared and analyzed in terms of convergence, running time, calculation range and stability of optimization results, revealing their respective calculation characteristics. Finally, the effectiveness of parameter matching and optimization methods are well validated by comparison and analysis of simulation. The proposed methods can select a good parameter matching scheme of the H-SFCL to deal with different requirements.Keywords: hybrid type DC SFCL (H-SFCL); DC circuit breaker (DCCB); voltage source converter (VSC); parameter matching; optimization IntroductionVoltage source converter (VSC)-based DC transmission technology can realize active and reactive power controlling [1] and bus voltage supporting [2], which can restrain the fluctuation and randomness of renewable energy in a large range and has potential advantages in renewable energy paralleling in the power grid [3,4]. Meanwhile with a common DC voltage and easy parallel connections, VSC-based DC transmission technology is the most appropriate for multi-terminal DC systems (MTDC) [5]. As a promising research hotspot, several VSC-based demonstration projects have been built including the conventional two or three level converter and modular multi-level converter [6][7][8][9][10]. Nevertheless, the safe, reliable and continuous operation of VSC-based DC system is the premise of exerting its own advantages. Due to the low damping of the DC system, DC short-circuit fault with high current rising rate and fast fault propagation speed is a great threat to the VSC-based DC system [11], which requires the sensitivity of fault identification and the rapidity of protective action. According to [12,13], DC short-circuit current must be interrupted within 5 ms to ensure the safety of VSC components.At present, there are three main methods to deal with DC short-circuit fault, including blocking trigger pulse of converter, opening all AC circuit breakers (ACCBs) on AC sides of the VSC system then opening DC circuit breakers (DCCBs) [13]. DC short-circuit current is difficult to be cleared because

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High‐voltage DC circuit breaker with gradual fault‐current limitation mechanism for VSC‐HVDC applications

Aḥmad

Wang

Zhang³

2020

Int Trans Electr Energ Syst

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Summary Fault‐current limiters are generally deployed to overcome the capacity issues of high‐voltage direct current circuit breakers. This research work reports a hybrid direct current circuit breaker with an incremental fault‐current limiting circuit, in order to protect high‐voltage direct current transmission lines based on voltage source converters, against commonly appearing line‐to‐line or line‐to‐ground faults. The proposed breaker comprises of three branches: branch for the normal current flow, high inductance carrying branch for the fault‐current limitation, and branch to isolate the fault current. The normal current carrying path contains a bidirectional switch, breaker impedance, and a mechanical disconnector. Incremental fault‐current limiting circuit is placed in fault‐current limiting branch, which consists of n‐numbers of branches in a parallel configuration, and each branch is composed of a bidirectional switch and a current limiting inductor. By the application of incremental fault‐current limiting circuit, the fault current is decreased gradually; at the terminal stage the residual current is transferred to fault‐current isolation branch, which is composed of metal oxide arrester. The article further includes a detailed working principle of the proposed breaker, an analytical model for fault‐current estimation, and criteria to optimize the size of current limiting inductors in incremental fault‐current limiting circuit. The theoretical analysis is verified using equivalent circuit approach and three‐terminal voltage source converter based direct current transmission line model. PSCAD/EMTDC software is used to acquire the simulation results. The performance of the proposed breaker is equated with some of the existing topologies, for rigorous comparative analysis to gauge the competitiveness.

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Direct-Current Vacuum Circuit Breaker With Superconducting Fault-Current Limiter

Cited by 24 publications

References 21 publications

A Thyristor-Based DC Fault Current Limiter With Inductor Inserting–Bypassing Capability

A Thyristor-Based DC Fault Current Limiter With Inductor Inserting–Bypassing Capability

Parameter Matching and Optimization of a Hybrid Type DC SFCL Considering the Transient Characteristics of VSC-Based DC Systems

High‐voltage DC circuit breaker with gradual fault‐current limitation mechanism for VSC‐HVDC applications

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