Self-Powered On-Line Signal Injection Based on a Current Transformer

被引:0
作者
De Rybel, Tom [1 ]
Singh, Arvind [1 ]
Pak, Phalmoniroth [2 ]
Marti, Jose R. [1 ]
机构
[1] Univ British Columbia, Dept Elect & Comp Engn, 2332 Main Mall, Vancouver, BC V6T 1Z4, Canada
[2] ESIEE Amiens, F-80082 Amiens 2, France
来源
2008 IEEE ELECTRICAL POWER AND ENERGY CONFERENCE | 2008年
关键词
asset condition monitoring; condition-based monitoring; CT; current transformer injection; high-power signal injection; on-line diagnostics; self-powered; self-referenced instrumentation;
D O I
暂无
中图分类号
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号
0807 ; 0820 ;
摘要
An on-line signal injection approach based on a special current transformer is proposed as part of a solution for improving the test set-up of transfer function diagnostics of transformers. However, the method is general and applicable to many types of sub-system equipment, such as breakers and transmission lines. The system allows a high-power, high-frequency test signal to be injected directly on a high-voltage bus of an energised system. Due to the self-contained nature of the system, no external power supplies or signal generators are needed and the design does not need to be ground-referenced. The system can be at the bus potential. In conjunction with wireless communication for control, no isolator bushings are required and the device can be constructed as a sleeve to be mounted around the bus-bar. This allows for economical retro-fitting to existing installations. In this paper, the operational need for such an injection device is discussed, followed by the theory behind the proposed concept. An example injection core for a 512 kV system is designed to show the practical validity of the concept and numerical simulations are performed for validation. It is shown that the injection concept is a viable, high-power, wide-band signal source for on-line equipment testing.
引用
收藏
页码:512 / +
页数:3
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