Single-phase earth fault protection method based on combined voltage criterion in high voltage shunt capacitor

被引：0

作者：

Ma W. ^{[1
]}

Kong S. ^{[1
]}

Liu C. ^{[1
]}

Song C. ^{[1
]}

Liu Y. ^{[1
]}

机构：

[1] State Grid Henan Electric Power Research Institute, Zhengzhou

来源：

Dianli Xitong Baohu yu Kongzhi/Power System Protection and Control | 2019年 / 47卷 / 22期

关键词：

Combined voltage; Comparing; Shunt capacitor; Single-phase earth fault; Voltage phase; Voltage value;

D O I：

10.19783/j.cnki.pspc.181608

中图分类号：

学科分类号：

摘要：

In allusion to the insufficiency of capacitor bank single-phase fault protection at present, this paper puts forward a combined voltage criterion protection method by comparing three-phase ground voltage to distinguish the single-phase earth fault. Aiming at constructing combined voltage criterion, voltage value comparison method and voltage phase comparison method are analyzed theoretically and a protection setting calculation method is given. Through analyzing and comparing the advantage and disadvantage of the two methods, voltage value comparison method is recommended to construct the combined voltage criterion. Furthermore, the feasibility of combined voltage criterion is verified by simulation. Since the protection will act only if all the three phase voltages are satisfied, the combined voltage criterion has a better function to prevent protection misoperation caused by PT breaking. © 2019, Power System Protection and Control Press. All right reserved.

引用

页码：142 / 147

页数：5

共 21 条

[11]

Li Z., Pang S., Protection setting on high voltage shunt capacitor, Power Capacitor & Reactive Power Compensation, 36, 1, pp. 7-10, (2015)

[12]

Sheng G., Lin H., Yan F., Et al., Imbalance protection calculation on high voltage shunt capacitor bank with internal fuse and asymmetric wiring, Power Capacitor & Reactive Power Compensation, 34, 6, pp. 60-65, (2013)

[13]

Li K., Influence analysis of capacitance change of shunt capacitor bank on unbalance current protection, Guangxi Electric Power, 40, 1, pp. 55-56, (2017)

[14]

Zhang Y., Hu J., Study on calculation and balancing of neutral point imbalance current in double star capacitor bank, Power Capacitor & Reactive Power Compensation, 36, 5, pp. 12-17, (2015)

[15]

Lai P., Zhou X., Qiu D., Research on transient-current frequency analysis and faulty line detecting method in indirectly grounding power system, Power System Protection and Control, 43, 4, pp. 51-57, (2015)

[16]

Sima W., Jiang X., Peng Q., Et al., Analysis and protection of overvoltage of 35 kV shunt compensation capacitor bank when relay protection take action, High Voltage Apparatus, 53, 8, pp. 1-8, (2017)

[17]

Wu Y., Huang B., Yan L., Et al., Parameters selection of shunt capacitor device at 110 kV side of main transformer in 1000 kV substation, Power System Technology, 33, 10, pp. 42-47, (2009)

[18]

Xu Y., Liu J., Fu Y., Fault-line selection and fault-type recognition in DC systems based on graph theory, Protection and Control of Modern Power Systems, 3, 3, pp. 267-276, (2018)

[19]

Liu Z., Cao M., Dong T., Fault line selection of neutral indirectly grounding system based on waveform similarity, Power System Protection and Control, 45, 21, pp. 89-95, (2017)

[20]

Xu M., Gao S., Chang Z., Et al., Model recognition based single-phase earthed faulty line selection method of Petersen coil grounded system, Power System Protection and Control, 46, 2, pp. 73-78, (2018)

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