The Parameter Design and System Simulation of 160-kV/1-kA Resistive-Type Superconducting DC Fault Current Limiter

Song, Meng; Ma, Tao; Sheng, Chao; Dai, Shaotao; Zhong, Lianhong; Duan, Xinhui; Li, Li

doi:10.1109/tasc.2019.2911305

Cited by 32 publications

(12 citation statements)

References 8 publications

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“…A 160 kV/1 kA DC resistive SFCL based on rare earth barium copper oxide (REBCO) tape has been developed and installed at the Nan'ao ±160 kV HVDC power grid in China, which is the highest voltage level and the largest capacity in the world so far. This SFCL consists of 24 pancake coils with noninductive winding [15], [16]. In the European Union FAST-GRID project, a 50 kV/1.5 kA DC resistive SFCL module will be developed and tested.…”

Section: Introductionmentioning

confidence: 99%

Experimental Tests of DC SFCL Under Low Impedance and High Impedance Fault Conditions

Pei

Song

et al. 2021

IEEE Trans. Appl. Supercond.

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DC system protection is more challenging than that for AC system due to the rapid rate of rise of the fault current and absence of natural current zero-crossing in DC systems. Superconducting fault current limiter (SFCL) in DC systems is a promising technology to reduce the fault current level and the rate of rise of the fault current, and also SFCLs have no resistance during normal operation. In this paper, the behaviors of an SFCL coil are investigated under both low impedance and high impedance fault conditions in DC systems. In the low impedance fault condition system, the SFCL coil performs effective limitation of the fault current level under different prospective fault current levels. The application of SFCLs with limited inductance in the DC system can be a potential solution to effectively suppress the fault current under low impedance short-circuit faults. The SFCL coil under the high impedance fault condition can only limit the prospective fault current when it is much higher than the critical current of the coil.

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Section: Introductionmentioning

confidence: 99%

Experimental Tests of DC SFCL Under Low Impedance and High Impedance Fault Conditions

Pei

Song

et al. 2021

IEEE Trans. Appl. Supercond.

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“…A dc R-SFCL prototype has been designed and tested [43], whose topology is drawn in figure 5 and the structural parameters of the prototype are listed in table 1.…”

Section: Resistive Type Superconducting Fault Current Limitermentioning

confidence: 99%

R-Q curve based evaluation method for current-limiting performance of DC R-SFCL in high voltage DC system

Wang

et al. 2020

Supercond. Sci. Technol.

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The current-limiting performance of the dc resistive-type superconducting fault current limiter (dc R-SFCL) is vital to the reliability in the high voltage dc current (HVDC) transmission system. It is expensive and difficult to utilize the discharging process of the precharged dc capacitor to evaluate the current-limiting performance. In this paper, a R-Q curve based evaluation method for current-limiting performance of dc R-SFCLs in dc system is proposed, which replaces the dc impulse experiment with ac impulse experiment. A ± 160kV dc SFCL prototype is designed by Guangdong Power Grid Co., Ltd., and tested to acquire the experimental heat accumulation Q and the experimental R-Q curve. Accordingly, the mathematical model consistent with the prototype is built in PSCAD. Finally, a fault condition is simulated in dc system to verify the feasibility of the R-Q curve based evaluation method. It is shown that the proposed method has superior properties in simplifying the testing platform, reducing the test requirements and costs, and providing reference for precise modeling of SFCLs.

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“…In addition, recent researches scarcely focus on the stability of DC grids with DC equipment, such as the currentlimiting reactor, smoothing reactor. It is well known that the current-limiting reactor can assist the DC circuit breaker in removing DC faults [21][22][23], and the smoothing reactor can effectively suppress the harmonics of DC current, maintain the stability of DC side voltage, and reduce the impact of DC side voltage on the converter station [24][25]. However, such large-capacity reactors increase the electrical distance between converter stations, which adversely affect the stability of the DC grid and the control of DC voltage.…”

Section: Introductionmentioning

confidence: 99%

Small-Signal Stability Modeling for MMC-Based DC Grids With Voltage Slope Control and Influence Analysis of Parameters

Fan

LIU

2022

IEEE Access

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In the flexible DC grids, selections of slope coefficients in system level controls and designs of smoothing reactors have a crucial influence on the system stability. In order to obtain their optimal values, a comprehensive small-signal stability model with the DC voltage slope control and smoothing reactors is proposed in this paper. Firstly, the linear state-space model of the entire system based on the small-signal method is deduced according to the coupling equations between the inputs, the outputs, and state variables related to converter stations and the AC sides, controllers, and the DC grid with smoothing reactors. Meanwhile, the influences of the MMC bridge arm circulating current and the capacitor voltage fluctuation of the sub-module are considered in this model. Secondly, the impacts of control parameters, smoothing reactor parameters, and bridge arm inductances are analyzed on the system stability through the Lyapunov stability theory. Finally, the simulation of Zhangbei four-terminal DC grid project in China is established to testify the correctness of the presented small-signal model and the conclusions about the impact of parameters on the system stability. The proposed method will provide some theoretical guidance for the system design and the parameter selection in DC grid applications.INDEX TERMS DC grids, modular multilevel converter, small-signal method, slope control, smoothing reactor.

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The Parameter Design and System Simulation of 160-kV/1-kA Resistive-Type Superconducting DC Fault Current Limiter

Cited by 32 publications

References 8 publications

Experimental Tests of DC SFCL Under Low Impedance and High Impedance Fault Conditions

Experimental Tests of DC SFCL Under Low Impedance and High Impedance Fault Conditions

R-Q curve based evaluation method for current-limiting performance of DC R-SFCL in high voltage DC system

Small-Signal Stability Modeling for MMC-Based DC Grids With Voltage Slope Control and Influence Analysis of Parameters

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