Get Full Government Meeting Transcripts, Videos, & Alerts Forever!
Get email alerts on the Utility Infrastructure topic
No spam. Unsubscribe anytime.
Mount Pleasant utility highlights substation repairs, aging fleet and solar interconnection concerns
Summary
The utility reported repairs to a recloser and generator exciter, plans to site a new substation, fleet inspection limits from Altek affecting an old bucket truck, and raised safety and operational concerns about net-metered rooftop solar and potential rate changes.
The city's utility department reported several infrastructure and reliability items at the work session, including a substation recloser failure, generator exciter damage and concerns about aging inspection policies that affect the fleet.
Speaker 4, a utility staff member, said a recloser at a local substation went bad; the department has a spare recloser used for switching between substations and plans to install the spare to avoid taking lines out for switching. Staff are scouting property near a storage-shed area (referred to as the Christmas and RaineyMax area) for a proposed Sub 3 to accept a planned new transmission line.
On generation and maintenance, Speaker 4 said a generator rewind revealed exciter damage that likely caused the failure; the department is evaluating moving to a brushless exciter design similar to nearby Parkland Harbor but noted that the change is expensive. Speaker 4 also described maintenance on hydro units (including work on a 1939 unit) and said the tree-trimming program has cut outages by about 45%.
Speaker 4 also raised concerns about fleet inspections after learning that Altek will no longer inspect trucks older than 2001, which affects the city's 1999 bucket truck. The utility plans to budget for a new line truck next year and to create a truck/equipment reserve alongside a hydro reserve.
Solar interconnection and safety became a major topic. Speaker 4 described an incident in which a customer's rooftop solar system fed power back onto the grid during an outage, causing unexpected energization of lines. "My concern is that ... when we do net metering ... that transformer is gonna step it up to 7,200 volts," Speaker 4 said, describing technical back-feed risks. Staff proposed reviewing compensation/rate structures for solar to reflect added staff time and reliability considerations but did not present a formal rate change.
What happens next: utility staff will pursue the recloser replacement, continue generator/hydro maintenance planning, provide a report on equipment inspection impacts and bring options for fleet replacement and any proposed solar rate changes to a future meeting. No formal action was taken at this session.
