Electric Utilities FLISR/Reliability Indices win with 5G and IoT - Part 3

By Ken Caird, Chief technology Officer, Energy & Utilities at VNCTech Group 

In Part 1 of this blog series we discussed how 5G and the IoT can help utilities save 100’s of thousands of dollars in load reduction with enhancing the capabilities of CVR. In Part 2 we showed how similar dollars values can be save by 5G and the IoT by reducing distribution system losses and efficiencies with enhancing VARVVO capabilities. You can access both Part 1 and Part 2 at my VNCTech Group Energy & Utilities page scrolling under "Publications"


In Part 3, the last of this blog series, we will show how 5G and IoT can help distribution utilities vastly improve reliability indices.


First, let us look how the industry measures reliability. The IEEE Standard 1366 lays out a list 13 indices that can be used to measure reliability. For this blog I am going to focus on two of the most used indices.


1. SAIDI (System Average Interruption Duration Index)

  • The total number of minutes (or hours) of interruption the average customer experiences

  • Formula: SAIDI = Σ (Outage Duration * Number Customers Interrupted) / Total Customers Served)

2. CAIDI (Customer Average Interruption Duration Index)

  • The average time required to restore service

  • Formula: CAIDI = Σ (Outage Duration * Number Customers Interrupted) / Σ (Number of Interruptions * Number of Customers Interrupted)


It is important to clearly understand ...


Chief Technology Officer

Energy & Utilities

VNCTech Group



Dallas, Texas, USA

VNC Technologies Company

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