Mode Combination of Fault Limiting Operation Based on Multiple Resistance Superconducting Fault Current Limiter

doi:10.16628/j.cnki.2095-8188.2021.01.005

Abstract

Abstract:

Based on a brief analysis of the quenching mechanism and basic model of conventional resistance superconducting fault current limiters,and in order to alleviate the inherent defects of conventional resistance superconducting fault current limiters,a combination of fault current limiting operation modes based on multiple resistance superconducting fault current limiters was proposed.A custom model of resistance superconducting fault current limiter was built on the PSCAD/EMTDC simulation platform,and based on the Nan’ao 160 kV multi-terminal flexible DC transmission system,the influence of the superconducting fault current limiter on the power system during system failure was preliminarily studied to show the correctness and necessity of the custom model.The advantages and disadvantages of conventional resistance superconducting fault current limiters was compared to the mode combination under the same current limiting effect,which provides a theoretical basis for the selection of superconducting fault current limiters in flexible DC transmission systems.

Key words: superconducting fault current limiter, fault current limiting, short-circuit current, model, mode combination

CLC Number:

TM73

CAO Langheng, WANG Dongpeng. Mode Combination of Fault Limiting Operation Based on Multiple Resistance Superconducting Fault Current Limiter[J]. LOW VOLTAGE APPARATUS, 2021, 0(1): 29-35.

Figures/Tables 13

References 16

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状态	电流最大值/kA	电流最小值/kA
不加限流器	42.702	-25.006
接并联状态限流器	17.159	-0.037
接单电阻状态限流器	10.562	0.061
接串联状态限流器	5.926	-0.139

过渡电阻/Ω	状态	电流最大值/kA	电流最小值/kA
5	不加限流器	17.869	-2.878
	接并联状态限流器	10.167	0.091
	接单电阻状态限流器	7.194	0.091
	接串联状态限流器	4.583	0.091
10	不加限流器	10.670	-0.999
	接并联状态限流器	7.082	0.091
	接单电阻状态限流器	5.412	0.091
	接串联状态限流器	3.725	0.091
15	不加限流器	7.579	-0.482
	接并联状态限流器	5.469	0.091
	接单电阻状态限流器	4.382	0.091
	接串联状态限流器	3.195	0.091

状态过渡电阻/Ω	短路电流/kA
状态过渡电阻/Ω	不加限流器	接并联状态限流器	接单电阻状态限流器	接串联状态限流器
0.5	16.094	9.474	6.776	4.365
5	6.070	4.336	3.451	2.551
10	3.927	2.859	2.292	1.846
15	2.915	2.096	1.760	1.491

状态过渡电阻/Ω	短路电流/kA
状态过渡电阻/Ω	不加限流器	接并联状态限流器	接单电阻状态限流器	接串联状态限流器
0	54.271	26.285	17.006	9.831
0.5	49.472	24.718	16.219	9.500
2	38.922	20.970	14.254	8.659

状态过渡电阻/Ω	短路电流/kA
状态过渡电阻/Ω	不加限流器	接并联状态限流器	接单电阻状态限流器	接串联状态限流器
0	26.535	15.611	10.970	6.832
0.5	23.509	14.090	10.038	6.366
2	17.378	10.956	8.097	5.377