Empirical Relationships Between Air-Load Break Switch Parameters and Interrupting Performance

被引：17

作者：

Stoa-Aanensen, Nina Sasaki ^{[1
,2
]}

Runde, Magne ^{[2
]}

Jonsson, Erik ^{[2
]}

Teigset, Anders Dall'Osso ^{[3
]}

机构：

[1] Norwegian Univ Sci & Technol NTNU, Dept Elect Power Engn, N-7491 Trondheim, Norway

[2] SINTEF Energy Res, N-7465 Trondheim, Norway

[3] Sweco, N-0212 Oslo, Norway

来源：

IEEE TRANSACTIONS ON POWER DELIVERY | 2016年 / 31卷 / 01期

关键词：

Load break switch; logistic regression; medium voltage (MV); switchgear; thermal interruption;

D O I：

10.1109/TPWRD.2015.2435804

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A simple gas-blow switch, consisting of an axisymmetric tulip/pin contact and a cylindrical polytetrafluoroethylene (PTFE) nozzle, has been used for empirical studies of medium-voltage load current interruption in air. Only the thermal phase of the interruption is considered. Based on the results of more than 3000 interruption tests, a logistic regression model has been developed to describe the relationships between the switch design and test circuit parameters, and the current interruption capability. The most important design recommendation is that the inner diameter of the nozzle should be only slightly larger than the pin contact. The upstream overpressure needed for successful interruption increases as a polynomial function of degree 0.5-1 with the rate of rise of recovery voltage and of degree 2-3 with increasing current.

引用

页码：278 / 285

页数：8

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