A New Online Temperature Compensation Technique for Electronic Instrument Transformers

• Published in: IEEE access 2019, Vol.7, p.97614-97623
• Main Authors: Li, Zhenhua, Du, Yawei, Abu-Siada, A., Li, Zhenxing, Zhang, Tao
• Format: Article
• Language: English
• Subjects: Accuracy; Control equipment; digital substations; Electronic equipment; Electronic instrument transformers; Instrument transformers; Operating temperature; Power supplies; Smart grid; Substations; Temperature compensation; Temperature measurement; Temperature sensors; Thermal stability; Thermometers; Voltage measurement; Wireless communication; Wireless sensor networks; wireless temperature measurement
• ISSN: 2169-3536; 2169-3536
• DOI: 10.1109/ACCESS.2019.2930007

Electronic instrument transformers are expected to play a significant protection and control role in the future smart grids. This paper aims at improving the performance and accuracy of electronic instrument transformers that are replacing the conventional current and potential transformers in the future digital substations. One of the main issues associated with the electronic instrument transformer is its poor thermal stability that affects the accuracy of the measurements. In this paper, to overcome this issue, a new wireless temperature measurement and compensation technique is proposed. In this technique, the operating temperature of the electronic transformer is continuously monitored and its impact on the measurements is compensated in real-time. The experimental results reveal that the proposed technique can effectively improve the thermal stability and measurement accuracy of the electronic instrument transformers.