NYISO says NY state power grid has enough electric power through 2026
he New York ISO on April 11 said that the state’s bulk power system will meet all applicable reliability criteria through 2026, according to the “2016 Comprehensive Reliability Plan,” which was approved by the NYISO board of directors.
The NYISO said that while finding that all reliability needs have been satisfied on the bulk power system, the 2016 plan notes that reliability margins could change over the study period – 2017-2026 – based upon changes in assumptions and other possible risk factors, such as changes in generation and transmission resources available to the electric system.
According to the 2016 plan, the 2016 reliability needs assessment is the first step of the NYISO reliability planning process, and the NYISO initiated the 2016 plan after its board approved the 2016 RNA last October.
Using the 2016 RNA base case developed in accordance with the NYISO’s procedures, the RNA assessed the resource adequacy and transmission security of the New York State bulk power transmission facilities from 2017 through 2026.
As an initial step, the 2016 plan added, the NYISO provided preliminary results to stakeholders and sought material updates that could address the preliminary reliability needs. The NYISO received and included in the RNA base case these network updates, which led to the elimination of a number of initially identified reliability needs:
· New York State Electric and Gas (NYSEG)/Rochester Gas & Electric’s (RGE) terminal upgrades, now in service, increased the ratings on the Stolle Road-Gardenville 230-kV Line #66, thus eliminating a post-contingency overload
· NYSEG/RGE’s terminal upgrades, planned to be in service by 2019, increase the ratings on the Clay-Pannell PC1 and PC2 345-kV lines
The 2016 plan added that the 2016 RNA found no resource adequacy violations, but identified two transmission security reliability needs beginning in 2017: the NYSEG Oakdale 345/115-kV transformer, and the Long Island Lighting Co. d/b/a Long Island Power Authority (LIPA) East Garden City to Valley Stream 138-kV line.
The 2016 plan noted that following completion of the 2016 RNA, and in response to the NYISO’s request for updates to local transmission owner plans that may impact the identified reliability needs, the NYISO received these updates from NYSEG and LIPA:
· NYSEG’s LTPs address the Oakdale reliability need by adding a third Oakdale 345/115-kV transformer and reconfiguring the Oakdale substation by 2021. Operating procedures will be used to maintain the system’s security until the Oakdale upgrades are in service. Those operating procedures include the use of any available special case resources, pre-planning for timely clearing of stuck breaker conditions, and possible load shedding, as needed, up to 25 MW following the N-1-1 contingency during summer peak conditions
· LIPA’s LTPs address the East Garden City to Valley Stream Reliability Need by using non-consequential load loss under N-1-1 conditions
The NYISO incorporated those updates into the 2016 plan base case, and with those updates, concluded that the two reliability needs are eliminated, and that there is no need to solicit solutions under the 2016 plan process.