TITLE:
Data Compression for Next Generation Phasor Data Concentrators (PDCs) in a Smart Grid
AUTHORS:
Erwan Olivo, Mitch Campion, Prakash Ranganathan
KEYWORDS:
Compression, PDCs, Data Security, Smart Metering, Smart Grid
JOURNAL NAME:
Journal of Information Security,
Vol.7 No.5,
September
14,
2016
ABSTRACT: The storage space and cost
for Smart Grid datasets has been growing exponentially due to its high
data-rate of various sensor readings from Automated Metering Infrastructure
(AMI), and Phasor Measurement Units (PMUs). The paper focuses on Phasor Data Concentrators (PDCs) that aggregate data from
PMUs. PMUs measure real-time voltage, current and frequency parameters
across the electrical grid. A typical PDC can process data from anywhere ten to
forty PMUs. The paper exploits the need for appropriate security and data
compression challenges simultaneously. As a result, an optimal compression
method ER1c is investigated for efficient storage of IREG and C37.118
timestamped PDC data sets. We expect that our approach can greatly reduce the
storage cost requirements of commercial available PDCs (SEL 3373, GE Multilin
P30) by 80%. For example, 2 years of PDC data storage space can be easily
replaced with only 10 days of storage space. In addition, our approach in
combination with AES 256 encryption can protect PDC data to larger degree as
per National Institute of Standards and Technology (NIST) standards.