Guide for Electric Power Substation Physical and Electronic Security

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Substations may contain microprocessor-based relays and programmable logic controllers(PLCs),as well as other intelligent electric devices(IEDs).In addition,many utilities are including local area network (LAN)systems within the substation environment.These LAN systems will allow IEDs and relays to share information as well as transmit important system data directly to the control center of various utilities.However,
the introduction of computer systems with on-line access to substation information is significant in that substation relay protection, control, and data collection systems may be exposed to the same vulnerabilities as all other computer systems. As the use of computer equipment within the substation environment increases,the need for security systems to prevent electronic intrusions may become even more important.


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