Impact of SFCL on the Four Types of HVDC Circuit Breakers by Simulation

Lee, Jong-Geon; Khan, Umer Amir; Lee, Ho-Yun; Lee, Bang-Wook

doi:10.1109/tasc.2016.2542847

Cited by 42 publications

(28 citation statements)

References 13 publications

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“…However, SFCL parameter optimization, economic performance analysis, design of electrical insulation are not yet investigated. Superconducting fault current limiters have been studied in VSC-HVDC systems [31][32][33][34][35][36][37]. A novel SFCL with both a superconducting coil and a resistance is presented for limiting rapidly growing current in VSC-HVDC systems during severe disturbances [32].…”

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confidence: 99%

“…Resistive type SFCLs reduce the current rating of DC circuit breakers. Maximum fault current, dissipated energy stress on HVDC circuit breaker and interruption time have been reduced with SFCLs by absorbing the fault energy during system disturbances [37]. A resistive-type SFCL with a chopper controlled resistor was presented [38] for transient stability augmentation of VSC-HVDC systems.…”

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confidence: 99%

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Fault Ride-through Capability Enhancement of Voltage Source Converter-High Voltage Direct Current Systems with Bridge Type Fault Current Limiters

Alam

Abido

2017

Energies

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This paper proposes the use of bridge type fault current limiters (BFCLs) as a potential solution to reduce the impact of fault disturbance on voltage source converter-based high voltage DC (VSC-HVDC) systems. Since VSC-HVDC systems are vulnerable to faults, it is essential to enhance the fault ride-through (FRT) capability with auxiliary control devices like BFCLs. BFCL controllers have been developed to limit the fault current during the inception of system disturbances. Real and reactive power controllers for the VSC-HVDC have been developed based on current control mode. DC link voltage control has been achieved by a feedback mechanism such that net power exchange with DC link capacitor is zero. A grid-connected VSC-HVDC system and a wind farm integrated VSC-HVDC system along with the proposed BFCL and associated controllers have been implemented in a real time digital simulator (RTDS). Symmetrical three phase as well as different types of unsymmetrical faults have been applied in the systems in order to show the effectiveness of the proposed BFCL solution. DC link voltage fluctuation, machine speed and active power oscillation have been greatly suppressed with the proposed BFCL. Another significant feature of this work is that the performance of the proposed BFCL in VSC-HVDC systems is compared to that of series dynamic braking resistor (SDBR). Comparative results show that the proposed BFCL is superior over SDBR in limiting fault current as well as improving system fault ride through (FRT) capability.Moreover, VSC-HVDC offers a solution for many problems faced nowadays by power networks such as network congestion, grid reinforcement, multi-terminal DC (MTDC) operation and asynchronous operations of two different grids [10]. Different types of VSC topologies are proposed in the literature [11,12] including two level, three level and multilevel converters for HVDC transmission. Multilevel means more than two voltage levels can be achieved in one phase leg, which reduces the switching times of valve and makes the voltage wave form closer to a sinusoidal curve. Line to neutral voltage waveforms of both two-level and three-level converters with PWM are discussed and compared in [12].However, despite the numerous advantages, VSC-HVDC systems face difficulties in dealing with different grid faults [13]. Fault ride-through (FRT) capability enhancement is one of the main requirements for wind farm-integrated VSC-HVDC systems [14,15]. During system faults, bulk power interruptions must be avoided by keeping the HVDC system energized, otherwise, the system may face serious instability due to this bulk power interruption. Modular multilevel converter-based VSC-HVDC system topologies can provide enhanced fault ride-through capability [16]. In [17,18] FRT capability as well as transient stability improvement have been reported by applying various VSC control techniques. A power synchronization control technique has been proposed in [19] with coordination between wind turbines and HVDC controllers in order to achieve FRT ...

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confidence: 99%

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confidence: 99%

Fault Ride-through Capability Enhancement of Voltage Source Converter-High Voltage Direct Current Systems with Bridge Type Fault Current Limiters

Alam

Abido

2017

Energies

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“…Each HCB is located at the output of both the rectifier and inverter sides. The detail specifications of the HVDC link are as follows [27]: the rated voltage ( ) = ±100 kV, nominal current ( ) = 1 kA, nominal power flow ( ) = 200 MW, DC reactor ( ) = 50 mH, and the transmission line length = 100 km. The basic parameters of the designed HCB topology are summarized in Table 2.…”

Section: Test System For Case Studiesmentioning

confidence: 99%

A Novel Topology of Hybrid HVDC Circuit Breaker for VSC-HVDC Application

et al. 2017

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Abstract:The use of high voltage direct current (HVDC) circuit breakers (CBs) with the capabilities of bidirectional fault interruption, reclosing, and rebreaking can improve the reliable and safe operation of HVDC grids. Although several topologies of CBs have been proposed to perform these capabilities, the limitation of these topologies is either high on-state losses or long time interruption in the case bidirectional fault current interruption. Long time interruption results in the large magnitude of the fault current in the voltage source converter based HVDC (VSC-HVDC) system due to the high rate of rise of fault current. This paper proposes a new topology of hybrid CB (HCB) with lower conduction loss and lower interruption time to solve the problems. The proposed topology is based on the inverse current injection method, which uses the capacitor to enforce the fault current to zero. In the case of the bidirectional fault current interruption, the capacitor does not change its polarity after identifying the direction of fault current, which can reduce the interruption time accordingly. A switching control algorithm for the proposed topology is presented in detail. Different operation modes of proposed HCB, such as normal current mode, breaking fault current mode, discharging, and reversing capacitor voltage modes after clearing the fault, are considered in the proposed algorithm. The proposed topology with the switching control algorithm is tested in a simulation-based system. Different simulation scenarios such as temporary and permanent faults are carried out to verify the performance of the proposed topology. The simulation is performed in the Matlab/Simulink environment.

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“…Deng et al [5] developed an expression establishing the relationship between the peak value of the discharge current and the current-limiting inductance with the result that a simple inductance was effectively used to protect the diodes. Several papers have investigated the superconducting fault current limiter [6][7][8][9]. method adopting both transient and steady fault components was proposed based on the theoretical analyses.…”

Section: Introductionmentioning

confidence: 99%

Line-to-Line Fault Analysis and Location in a VSC-Based Low-Voltage DC Distribution Network

Xue

Liu

2018

Energies

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A DC cable short-circuit fault is the most severe fault type that occurs in DC distribution networks, having a negative impact on transmission equipment and the stability of system operation. When a short-circuit fault occurs in a DC distribution network based on a voltage source converter (VSC), an in-depth analysis and characterization of the fault is of great significance to establish relay protection, devise fault current limiters and realize fault location. However, research on short-circuit faults in VSC-based low-voltage DC (LVDC) systems, which are greatly different from high-voltage DC (HVDC) systems, is currently stagnant. The existing research in this area is not conclusive, with further study required to explain findings in HVDC systems that do not fit with simulated results or lack thorough theoretical analyses. In this paper, faults are divided into transient-and steady-state faults, and detailed formulas are provided. A more thorough and practical theoretical analysis with fewer errors can be used to develop protection schemes and short-circuit fault locations based on transient-and steady-state analytic formulas. Compared to the classical methods, the fault analyses in this paper provide more accurate computed results of fault current. Thus, the fault location method can rapidly evaluate the distance between the fault and converter. The analyses of error increase and an improved handshaking method coordinating with the proposed location method are presented.

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Impact of SFCL on the Four Types of HVDC Circuit Breakers by Simulation

Cited by 42 publications

References 13 publications

Fault Ride-through Capability Enhancement of Voltage Source Converter-High Voltage Direct Current Systems with Bridge Type Fault Current Limiters

Fault Ride-through Capability Enhancement of Voltage Source Converter-High Voltage Direct Current Systems with Bridge Type Fault Current Limiters

A Novel Topology of Hybrid HVDC Circuit Breaker for VSC-HVDC Application

Line-to-Line Fault Analysis and Location in a VSC-Based Low-Voltage DC Distribution Network

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