Sigma-Delta ADC Topology Implementation Based on Partial Discharge Detection using Rogowski Coil Sensor

• Published in: Journal of physics. Conference series Vol. 1019; no. 1; pp. 12031 - 12038
• Main Authors: Rohani, M N K H, Isa, M, Syahril, M, Yii, C C, Rosmi, A S, Ismail, B
• Format: Journal Article
• Language: English
• Published: Bristol IOP Publishing 01.06.2018
• Subjects: Analog to digital converters; Coils; Discharge; Hardware description languages; High frequencies; Insulation; Internet of Things; Network topologies; Physics; Power cables; Sampling; Sensors; Signal processing; Wireless sensor networks
• ISSN: 1742-6588; 1742-6596
• DOI: 10.1088/1742-6596/1019/1/012031

Partial discharge (PD) diagnostic on high voltage (HV) power cables is a modern technology in order to investigate the insulation health. The trending technology such as wireless sensor network (WSN) and internet of thing (IoT) are mostly process in digital signal by microprocessor where looking toward on automatic system. The high performance of analog to digital converter (ADC) in term of sampling rate which is much expensive in order to convert the high frequency of analog PD signal that captured by Rogowski coil (RC) sensor. Thus, this paper propose the implementation of the Sigma-Delta (∑Δ) ADC topology in Altera DE0-Nano development board as an effective method in this work to replace the conventional ADC chip and the cost is minimal. Then, peak PD detection technique is applied after the conversion of the digital PD signal. The Verilog hardware description language (VHDL) is used in Quartus II software which corporate with Altera DE0-nano development board for the prototype development. In order to achieve the accurate digital sampling of high frequency PD signal, the N-bit of voltage resolution is paramount.