Optically powered instrumentation
- Photonic Power Systems, Inc., Mountain View, CA (United States)
- ABB Power Systems, Ludvika (Sweden)
Optical systems are becoming increasingly important for measurements of current, voltage and temperature in high voltage environments. Conventional electrical wiring such as a current transformer can readily be replaced by noise-free fiber optics at considerably lower cost. With an optically powered data link and a transducer, direct current, voltage and temperature measurements have been successfully demonstrated. The system includes two modules connected by optical fiber up to 1 km in length. One module is placed at a control site. It supplies optical power for transmission to, and receives data from, the measurement module, which is placed at a remote site, in this case at high voltage. The remote module converts the optical power into electrical power, and provides regulated power for the electronic circuitry, the transducer and a data communications link. The analog voltage form the transducer is fed into an analog to digital converter. Test results verify successful operation with a sampling rate of 33.3 kHz. Taking anti-aliasing filters into account, an equivalent analog bandwidth of 10 kHz was achieved. With an overall resolution of 0.025% (12 bits) and a 0.2% accuracy, the system is adequate for relaying. Fully operational over the temperature range {minus}40 C to +85 C, the system is sufficient for most electric power applications.
- OSTI ID:
- 376152
- Report Number(s):
- CONF-960426-; TRN: IM9642%%240
- Resource Relation:
- Conference: 58. annual meeting of the American power conference, Chicago, IL (United States), 9-11 Apr 1996; Other Information: PBD: 1996; Related Information: Is Part Of Proceedings of the American Power Conference. Volume 58-I; McBride, A.E. [ed.]; PB: 767 p.
- Country of Publication:
- United States
- Language:
- English
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