APPLICATION OF COMBINED CURRENT AND VOLTAGE SENSOR FOR PROTECTION AND METERING IN GIs SYSTEMS. | ||||
| ERJ. Engineering Research Journal | ||||
| Article 2, Volume 28, Issue 3, July 2005, Page 219-226 PDF (606.08 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/erjm.2005.69952 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
| Saad zaghloul1; Bakr El-Bastawisi2 | ||||
| 1Labor University. Alex. Egypt. | ||||
| 2Egyptian Electricity Authority, Alex, Egypt. | ||||
| Abstract | ||||
| Gas insulated switchgear (GIS) is an ideal system for installations in a limited space, if a high availability is required. The new combined sensors are a perfect base for a wide range of applications in protection, metering and control in the field of gas insulated substations. The two most important functions performed in this combined sensor are the measurement of current and voltage for protection, metering and conrrol. The principle of Regowski coil is used for current measurement and of the capacitive voltage divider for voltage measurement. Signals are converted to digital values and forwarded through fiber optical cable to local control cubicles. This data acquisition is an important part of an intelligent control and protection technique for GIS system. This paper describes the design of a combined sensor, block diagram and Accuracy features of such sensors. Good properties of the sensor permit its use for measurement, protection and control. Moreover, insulating gas density and temperature, also enables evaluating and recording the signals. The simple layout of this combined sensor significantly improves dielectric capability in comparison with conventional designs. Measuring techniques have been developed to asses and improve measuring and dynamic accuracy. Results show that the combined sensor is of better quality than known for conventional inductive instrument transformers. Combined current and voltage sensors for GIs fulfill the requirements for protection, metering and control which add several advantages for the user. | ||||
| Keywords | ||||
| Gas; Current; voltage; Sensors; protection; Transformers; CTNT; Pisa; control; Regowski Coil; IEC60044-2; IEC44-I; Over current Relays | ||||
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