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Making Electric Power Grids Resilient and Secure, Green Tech, Page 55

Making Electric Power Grids Resilient and Secure

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See entire paper: http://energy.wesrch.com/pdfTR1AU1FU5JWSL
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Smart Grid Protection Schemes & 
Communication Requirements
Type of relay Data Volume (kb/s) Latency

Present Future Primary  Secondary 
(ms)                      (s)
Over current protection 160 2500 4‐8 0.3‐1

Differential protection 70 1100 4‐8 0.3‐1

Distance protection 140 2200 4‐8 0.3‐1

Load shedding 370 4400 0.06‐0.1 (s)

Adaptive multi terminal 200 3300 4‐8 0.3‐1

Adaptive out of step 1100 13000 Depends on the 
disturbance

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