Research on Presure and Temperature Characteristics of Fault Arcing in GIS

doi:10.16628/j.cnki.2095-8188.2023.04.004

Abstract

Abstract:

In order to reduce the frequency of arcing fault in gas insulated switchgear (GIS) and reduce the harm caused by arcing fault,according to the parameters of ZF32-126 GIS,the influence of internal fault arcing on gas itself is considered on the basis of standard pressure and temperature calculation model,and an improved calculation model is adopted.The thermodynamic parameters of SF₆ under the fault arcing are calculated.On this basis,the thermodynamic parameters of SF₆ are applied to the calculation model of pressure and temperature.When the internal fault current is 40 kA,the pressure and temperature rise characteristics of each gas chamber in ZF32-126 GIS,the maximum ablation degree and average ablation rate of the shell under different protection time are obtained,which verifies that the improved standard algorithm has higher accuracy.

Key words: gas insulated switchgear(GIS), calculation method, arcing fault, thermodynamic parameters, ablation

CLC Number:

TM501.2

WANG Zhining, PENG Haibo, ZOU Shun. Research on Presure and Temperature Characteristics of Fault Arcing in GIS[J]. LOW VOLTAGE APPARATUS, 2023, 0(4): 21-27.

Figures/Tables 11

References 18

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额定短路电流/kA	保护段	电流持续时间/s	性能判据
<40 (有效值)	I	0.2	除了适当的压力释放装置动作外,没有外部效应
<40 (有效值)	Ⅱ	≤0.5	没有碎片(允许烧穿)
40 (有效值)	I	0.1	除了适当的压力释放装置动作外,没有外部效应
40 (有效值)	Ⅱ	≤0.3	没有碎片(允许烧穿)

ZF32-126设备各气室	保护时间为0.1 s		保护时间为0.3 s
ZF32-126设备各气室	压力上升值/MPa	最高压力值/MPa	压力上升值/MPa	最高压力值/MPa
CT室	0.59	1.09	1.28	1.78
母线出线室	1.03	1.53	1.45	1.95
断路器室	0.16	0.76	0.46	1.06
隔离接地开关 (GR)室	0.56	1.06	1.25	1.75
隔离接地开关 (GL)室	0.80	1.30	1.65	2.15
母线室	0.76	1.26	1.60	2.10
母线直筒室	1.10	1.60	1.40	1.90
接地开关室	1.23	1.73	1.60	2.10

ZF32-126设备各气室	保护时间为0.1 s		保护时间为0.3 s
ZF32-126设备各气室	温度上升值/K	最高温度值/K	温度上升值/K	最高温度值/K
CT室	355	655	790	1 090
母线出线室	620	920	900	1 200
断路器室	84	384	235	535
隔离接地开关 (GR)室	338	638	752	1 052
隔离接地开关 (GL)室	482	782	1 000	1 300
母线室	460	760	950	1 250
母线直筒室	665	965	885	1 185
接地开关室	745	1 045	950	1 250