High-Performance Multichannel Power-Line Monitoring with Simultaneous-Sampling ADCs

The rapid expansion of the electric power industry has created a worldwide need to reinforce existing transmission and distribution networks and to construct new substations.

Advances in microprocessor technology and the increasing cost of support staff are key drivers for power companies to design new automated high-voltage substations using high-accuracy integrated automation systems.

Substations can be classified into two categories, according to voltage level: high-voltage includes 500-kV, 330-kV, and some 220-kV substations, while 220-kV terminal substations, 110-kV, and 35-kV substations are considered medium- or low-voltage. High-voltage (transmission) substations are large outdoor sites. Low-voltage (distribution) substations are indoor systems located in urban areas to handle high load density.

Improved signal processing technologies make it possible to achieve better than 0.1% accuracy in next-generation systems, as compared to present systems’ typical 0.5% accuracy levels – an improvement mainly achieved with the use of high-performance simultaneous-sampling ADCs (analog-to-digital converters); they provide the resolution and performance that will be needed for future systems.

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Product Information Table:

Order Code	Mftrs. Part No.	Product Description
19M0879	AD7656BSTZ	16-Bit ADC, 6-channel
19M0880	AD7656YSTZ	16-Bit ADC, 6-channel
19M8686	ADM232LJNZ	Dual Transceiver
19M0706	ADM232LJRZ	Dual Transceiver
19M8689	ADM2486BRWZ	RS-485 Transceiver
59K2764	ADR421ARZ	Voltage Reference, 2.5V
59K2884	ADSP-BF531SBBCZ400	16-Bit Blackfin DSP
59K2886	ADSP-BF531SBBZ400	16-Bit Blackfin DSP
19M8737	ADSP-BF531SBSTZ400	16-Bit Blackfin DSP
19M0759	ADUM1402ARWZ	Digital Isolator, Quad channel
19M8759	ADUM1402BRWZ	Digital Isolator, Quad channel
19M8760	ADUM1402CRWZ	Digital Isolator, Quad channel
19M1025	OP1177ARZ	Low-Noise Amplifier
59K8809	OP2177ARZ	Dual Precision Amplifier
19M1035	OP747ARZ	Quad, Micropower Amplifier

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