Analysis model development and specification proposal of 154 kV SFCL for the application to a live grid in South Korea

Lee, S.; Yoon, Jae-Young; Yang, Bin; Moon, Young-Hyun; Lee, Byong Jun

doi:10.1016/j.physc.2014.03.009

Cited by 24 publications

(10 citation statements)

References 2 publications

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“…Recently, a number of practical superconducting fault current limiter (SFCL) devices have been successfully developed and demonstrated by in-grid tests. The current motivation on the applied superconductivity technology to build SFCL devices has been moving from the 10-kV distribution level [26,27] to the 100-kV transmission level [27,28].So far, fault current limiters have been comprehensively studied and applied in AC power grids to limit fault currents and to improve the dynamic performance of the system. However, the application of FCLs in VSC-HVDC systems has not been fully investigated [29].…”

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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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“…As seen in Figure 17, without SFCL, all the sag events dropped below and voltage swell dropped above the ITIC curve. However, with the insertion of SFCL, the sag events that can be improved and overvoltage are lessened, which dropped into the acceptable power the curve of ITIC are at B2, 3,4,15,16,17. Figure 18 represents the voltage sag and overvoltage from B2 to B17 when a short circuit occurred at tie breaker.…”

Section: B Case 2: the Fault Occurred At Tie Breaker Of Feeder 1 Witmentioning

confidence: 99%

“…SFCL offer an excellent solution for the increased level of short circuits in power systems, which can improve the stability of the power system. And various types of SFCLs are implemented at substation of power distribution system in real world power grids of many countries [1][2][3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Voltage quality performance improvement of a distribution feeder with Superconducting Fault Current Limiter

Chen¹,

Nguyen²

2015

ijeei

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Due to the rapid growth of load demand, different power sources are added to the power system, and the interconnection among various power devices for a modern electric grid also becomes more and more complicated. Therefore, the fault current is dramatically increasing, and Superconducting Fault Current Limiter (SFCL) has introduced to solve the related problems. In this paper proposes the strategies of applying SFCL to distribution feeder for the system performance improvement of power quality, including the fault current limiter and the mitigations of voltage variations including sag and swell. And the effectiveness for different feeder types, radial and closed-loop structures, is analyzed for Taiwan Power Company (Taipower) system. When a single-phase to ground fault happens to a certain point along the feeder or at the tie breaker, the simulation results show that SFCL can effectively limit the fault current, and the decrease in amplitude can be up to approximately 55%. Besides, the research results illustrate that the voltage sag severity at fault phase and voltage swell at non-fault phase are dependent of fault location. Therefore, the effectiveness of voltage quality improvement is definitely illustrated by the curve of Information of Technology Industry Council (ITI Curve).

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“…Several kinds of HTS electric power devices such as HTS cable and HTS-FCL are in progress of field test after R&D phase [1][2][3]. Such devices require a reliable and efficient high-capacity cryocooler and a crank-driven type Stirling cryocooler is widely used at present.…”

Section: Introductionmentioning

confidence: 99%

Development of high capacity stirling cryocooler

Ko¹,

Yeom²,

Kim³

et al. 2015

Progress in Superconductivity and Cryogenics

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Cryogenic cooling system for HTS electric power devices requires a reliable and efficient high-capacity cryocooler. A Striling cryocooler with a linear compressor can be a good candidate. It has advantages of low vibration and long maintenance cycle compared with a kinematic-driven Stirling cryocooler. In this study, we developed dual-opposed linear compressor of 12 kW electric input power with two 6 kW linear motors. Electrical performance of fabricated linear compressor is verified by experimental measurement of thrust constant. The developed Stirling cryocooler has gamma-type configuration. Piston and displacer are supported with flexure spring. A slit-type heat exchanger is adopted for cold and warm-end, and the generated heat is rejected by cooling water. In cooling performance test, waveforms of voltage, current, displacement and pressure are obtained and their amplitude and phase difference are analysed. Moreover, temperatures of cooling water, housing and linear motor are recorded and electric power parameters of driving circuit are also obtained. The developed Stirling cryocooler reaches to 47.8 K within 23.4 min. with no-load. From heat load tests, it shows cooling capacity of 440 W at 78.1 K with 6.45 kW of electric input power and 19.4 of % Carnot COP.

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Analysis model development and specification proposal of 154 kV SFCL for the application to a live grid in South Korea

Cited by 24 publications

References 2 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

Voltage quality performance improvement of a distribution feeder with Superconducting Fault Current Limiter

Development of high capacity stirling cryocooler

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