A Novel Security Methodology for Smart Grids: A Case Study of Microcomputer-Based Encryption for PMU Devices

Coordination of a power system with the phasor measurement devices (PMUs) in real time on the load and generation sides is
carried out within the context of smart grid studies. Power systems equipped with information systems in a smart grid pace with
external security threats. Developing a smart grid which can resist against cyber threats is considered indispensable for the
uninterrupted operation. In this study, a two-way secure communication methodology underpinned by a chaos-based encryption
algorithm for PMU devices is proposed. (e proposed system uses the IEEE-14 busbar system on which the optimum PMU
placement has been installed. (e proposed hyperchaotic system-based encryption method is applied as a new security
methodology among PMU devices. (e success of results is evaluated by the completeness of data exchange, durations, the
complexity of encryption-decryption processes, and strength of cryptography using a microcomputer-based implementation. (e
results show that the proposed microcomputer-based encryption algorithms can be directly embedded as encryption hardware
units into PMU and PDC devices which have very fast signal processing capabilities taking into considerations the acceptable
delay time for power system protection and measuring applications and quality metering applications which is 2 ms and 10 ms,
respectively. While proposed algorithms can be used in TCP or UDP over IP-based IEEE C37.118, IEC 61850, and IEC 61850-90-5
communication frameworks, they can also be embedded into electronic cards, smartcards, or smart tokens which are utilized for
authentication among smart grid components.

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