October 9, 2017

Hon. Kimberly Bose Secretary

Federal Energy Regulatory Commission 888 First Street, N.E.

Washington, D.C.  20426

Re:    New York Independent System Operator, Inc., Notification of Major Emergency
in the New York Control Area; Docket No. EY18-__-000

Dear Secretary Bose:

Pursuant to Section 2.13 of its Open Access Transmission Tariff (“OATT”), the New York Independent System Operator, Inc. (“NYISO”) hereby notifies the Commission that an “Emergency State” existed in the New York Control Area on October 8, 2017 at 13:10.  As a result, the NYISO was required to take special action to ensure that the reliability of the New York State Transmission System was not adversely affected.  The NYISO has enclosed documentation describing the Emergency State and its actions.  As required by Section 2.13 of the OATT, the NYISO has also notified the New York State Public Service Commission of the Emergency State and its actions.

Please feel free to contact me at (518) 356-6159 if you have any questions or comments.
Sincerely,

/s/ Gregory Campoli

Gregory Campoli

Manager, Reliability, Compliance & Industry Affairs New York Independent System Operator

Enclosure

Cc:  Wes Yeomans
Ray Stalter

Chris Sharp

10 Krey Boulevard, Rensselaer, New York 12144 | www.nyiso.com

NYISO Major Emergency Report

At 1310 on 10/08/2017

This was caused by:

To correct this the NYISO Shift Supervisor:

Load relief was not required.

a Major Emergency was declared by the NYISO Shift Supervisor

when the power flow on Central East VC exceeded its Transient Stability Limit

by more than 105%

Loss of 7040/MSU-1 loaded at 650MW

Curtailed transactions, Started 2 Gilboa units, moved Phase Angle Regulators (PAR), and redispatched generation.

The Major Emergency was terminated at 1321 on 10/08/2017