Also known as Advanced Metering Infrastructure (AMI), smart meters are digital meters that measure and record electricity usage data hourly, or more frequently, and allow for remote two-way communication between utilities and the meters.
AMI or AMR Meters: What are the differences?
AMR uses a radiofrequency (rf) signal (much like your cell phone) to broadcast the meter’s usage data (in kWh) and serial number. No personally identifying information is shared. The signal is picked up by a receiver mounted to the roof of a truck which drives by on a monthly basis.
AMI also broadcasts meter usage data and serial numbers via rf, but instead of being sent to a truck, the info is sent via the cloud to the utility. No trucks needed. Unlike AMR, AMI allows the utility to send a signal back to the meter, enabling remote disconnect and reconnect, load sharing, and instant outage reporting.
Does the PUD have Smart Meters now?
Depends on who you ask. The PUD has over 19,000 electrical meters. 67% of them are analog, and 33% are digital. All are equipped with cellular Automated Meter Reading (AMR) modules. PSE installed the modules years before the PUD began electrical operation. The EMF Safety Network declares AMR meters smart meters, others do not. AMR is a one-way communication system. AMI is two way.
Why is the PUD exploring Smart Meters?
Jefferson County PUD has been exploring a full replacement of its electrical metering system since first taking control of the power grid in 2013. Staff have described the current system as “failing,” “hodge-podge,” and “widely inaccurate,” with up to 2/3 of the meters under reporting by 3-5%. Smart or AMI meters offer a number of reliability and performance advantages. They are also the current industry standard for metering worldwide.