The creation of the New York Independent System Operator (NYISO) was authorized by FERC in 1998 and launched on Dec. 1, 1999. The NYISO footprint covers the entire state of New York. NYISO is responsible for operating wholesale power markets that trade electricity, capacity, transmission congestion contracts, and related products, in addition to administering auctions for the sale of capacity. NYISO operates New York’s high-voltage transmission network and performs long-term planning.
The chronic transmission constraints in NYISO are in the southeastern portion of the state, leading into New York City and Long Island. As a result of their dense populations, New York City and Long Island are the largest consumers of electricity. Consequently, energy flows from the west and the north toward these two large markets, pushing transmission facilities near their operational limits. This results in transmission constraints in several key areas, often resulting in higher prices in the New York City and Long Island markets
List of Orders
| Docket No. |
Date Issued |
Company |
Title |
| ER24-95-000 |
07/25/24 |
New York Independent System Operator, Inc. |
Order On Compliance Filing |
| Docket No. |
Date Issued |
Company |
Title |
| EL22-64-000 |
09/21/2023 |
New York Independent System Operator, Inc. |
Order on Show Cause Proceeding |
| ER21-2460-003 |
04/20/2023 |
New York Independent System Operator, Inc. |
Order On Compliance Filing |
| ER22-2350-000 |
04/20/2023 |
New York Independent System Operator, Inc. |
Order on Compliance Filing |
EL22-15-001
ER22-1014-002 |
01/19/2023 |
New York Independent System Operator, Inc. and New York Power Authority |
Order on Compliance |
| Docket No. |
Date Issued |
Company |
Title |
| ER21-502-004 |
12/15/2022 |
New York Independent System Operator, Inc. |
Order on Remand |
| ER21-2460-002 |
10/24/2022 |
New York Independent System Operator |
Order Addressing Arguments Raised on Rehearing |
| EL21-7-000 |
09/22/2022 |
Cricket Valley Energy Center, LLC and Empire Generating Company, LLC v. New York Independent System Operator, Inc. |
Order Denying Complaint |
| ER21-2460-000 |
06/17/2022 |
New York Independent System Operator, Inc. |
Order on Compliance Filing |
| ER20-1718-002 |
02/17/2022 |
New York Independent System Operator, Inc. |
Order Addressing Arguments Raised on Rehearing Setting Aside Prior Order and Accepting Tariff Revisions |
| Docket No. |
Date Issued |
Company |
Title |
| EL21-49-001 |
11/18/21 |
Hecate Energy Greene County 3 LLC v. Central Hudson Gas & Electric Corporation and New York Independent System Operator, Inc. Rehearing |
Order Addressing Arguments Raised on Rehearing |
| EL21-49-000 |
07/15/21 |
Hecate Energy Greene County 3 LLC v. Central Hudson Gas & Electric Corporation and New York Independent System Operator, Inc. |
Order Denying Complaint |
| ER20-716-004 |
06/17/21 |
New York Independent System Operator, Inc. Settlement 2 of 2 |
Settlement Letter Order
|
| EL20-65-000 |
04/15/21 |
New York Independent System Operator, Inc. |
Order on Petition for Declaratory Order |
| EL16-92-004 |
02/18/21 |
New York State Public Service Commission, et. al.
v.
New York Independent System Operator, Inc. |
Order Addressing Arguments Raised on Rehearing, and Setting Aside Prior Order, in Part |
| Docket No. |
Date Issued |
Company |
Title |
| EL19-86-001 |
10/15/20 |
New York State Public Service Commission and New York State Energy Research and Development Authority
v.
New York Independent System Operator, Inc. |
Order Addressing Arguments Raised on Rehearing |
| ER16-1404-001 |
07/16/20 |
New York Independent System Operator, Inc. |
Order on Rehearing and Compliance |
| ER20-922-000 |
04/16/20 |
New York Independent System Operator |
Order Granting Waiver |
| ER19-1949-000 |
02/20/20 |
New York Independent System Operator, Inc. |
Order on Compliance |
| EL13-62-001 |
02/20/20 |
Independent Power Producers of New York, Inc.
v.
New York Independent System Operator, Inc. |
Order Granting in Part and Denying in Part Clarification and Rehearing |
| EL19-86-000 |
02/20/20 |
New York State Public Service Commission and New York State Energy Research and Development Authority
v.
New York Independent System Operator, Inc. |
Order Denying Complaint |
| EL16-92-001 |
02/20/20 |
New York State Public Service Commission, et. al.
v.
New York Independent System Operator, Inc. |
Order Granting in Part and Denying in Part Rehearing and Clarification and Rejecting Compliance Filing as Moot |
| ER16-1404-000 |
02/20/20 |
New York Independent System Operator, Inc. |
Order on Compliance |
| ER19-2276-000 |
01/23/20 |
New York Independent System Operator, Inc. |
Order Accepting Tariff Revisions and Directing Compliance Filing and Informational Report |
| EL18-188-000 |
01/23/20 |
NRG Curtailment Solutions, Inc. v. New York Independent System Operator, Inc. |
Order on Paper Hearing |
| ER18-1743-002 |
01/23/20 |
New York Independent System Operator, Inc. |
Order Denying Rehearing |
| Docket No. |
Date Issued |
Company |
Title |
| EL18-189-000 |
12/19/19 |
Independent Power Producers of New York, Inc.
v.
New York Independent System Operator, Inc. |
Order Denying Complaint |
| EL19-39-001 |
12/19/19 |
Light Power & Gas of NY LLC
v.
New York Independent System Operator, Inc. |
Order on Rehearing |
| ER17-905-002 |
12/19/19 |
New York Independent System Operator, Inc.
and
PJM Interconnection, L.L.C. |
Order Denying Rehearing |
| EL19-39-000 |
06/20/19 |
Light Power & Gas of NY LLC v. New York Independent System Operator, Inc. |
Order Denying Complaint |
| EL19-30-000 |
05/16/19 |
LS Power Grid New York, LLC and LS Power Grid New York Corporation I |
Order Granting Abandoned Plant Incentive in Part and Rejecting in Part |
| EL18-33-000 |
04/18/19 |
New York Independent System Operator, Inc. |
Order on Paper Hearing |
| ER16-120-007 |
03/21/19 |
New York Independent System Operator, Inc. |
Order on Compliance |
| ER17-1561-002 |
02/21/19 |
New York Independent System Operator, Inc. |
Order Dismissing Request for Waiver as Moot and Accepting Effective Date |
| ER18-1598-001, EL18-77-000 |
02/21/19 |
New York Independent System Operator, Inc.
and
Central Hudson Gas & Electric Corporation |
Order Accepting Revisions to Stated Transmission Rates in Response to the Commission's Order to Show Cause and Terminating Section 206 Proceeding |
| Docket No. |
Date Issued |
Company |
Title |
| EL18-188-000 |
12/20/18 |
NRG Curtailment Solutions, Inc.
v.
New York Independent System Operator, Inc. |
Order on Complaint, Denying Tariff Waiver, and Establishing Paper Hearing |
| ER15-2059-002, ER13-102-008 |
02/15/18 |
New York Independent System Operator, Inc. |
Order Granting, in Part, and Denying, in Part, Rehearing, and Clarification, and Requiring Further Compliance |
| ER17-156-002 |
02/15/18 |
New York Independent System Operator, Inc. |
Order Conditionally Accepting Tariff Revisions and Requiring Further Compliance |
| Docket No. |
Date Issued |
Company |
Title |
| EL18-33-000 |
12/21/17 |
New York Independent System Operator, Inc. |
Order Instituting Section 206 Proceeding and Paper Hearing |
| ER16-120-001, ER16-120-003, EL15-37-002 |
11/16/17 |
New York Independent System Operator, Inc. |
Order on Compliance and Rehearing |
| ER15-572-000, ER15-572-002, ER15-572-006 |
11/16/17 |
New York Transco, LLC |
Letter Order Accepting Settlement Agreement |
| ER17-1310-001 |
11/16/17 |
New York Independent System Operator, Inc., New York Public Service Commission |
Order Accepting Tariff Revisions |
| ER16-835-000 |
01/19/17 |
New York Independent System Operator, Inc. |
Letter Order Approving Settlement |
| Docket No. |
Date Issued |
Company |
Title |
| ER17-144-000 |
11/17/16 |
New York Independent System Operator, Inc. |
Order Granting Waiver |
| ER16-120-000 and EL15-37-001 |
04/21/16 |
New York Independent System Operator, Inc. |
Order on Compliance and Rehearing |
| ER15-572-001, -004 |
03/17/16 |
New York Transco, LLC
New York Independent System Operator, Inc.
Central Hudson Gas & Elec. Corp.
Consolidated Edison Co. of New York, Inc.
Niagara Mohawk Power Corp.
New York State Elec. & Gas Corp.
Orange and Rockland Utilities, Inc.
Rochester Gas and Electric Corp. |
Letter Order on Partial Settlement and Compliance |
| EL15-84-001 |
03/17/16 |
Caithness Long Island II, LLC
v.
New York Independent System Operator, Inc. |
Order Denying Rehearing |
| ER16-168-000, -001 |
02/18/16 |
New York Independent System Operator, Inc. |
Order Accepting Proposed Tariff Revisions Subject To Condition |
| Docket No. |
Date Issued |
Company |
Title |
| EL14-26-000 |
11/19/15 |
New York Independent System Operator, Inc. |
Order On Compliance Filing |
| ER12-1653-005 |
11/19/15 |
New York Independent System Operator, Inc. |
Order On Compliance Filing |
| EL12-98-001 and EL12-98-002 |
11/19/15 |
Hudson Transmission Partners, LLC
v.
New York Independent System Operator, Inc.
New York Independent System Operator, Inc. |
Order On Rehearing, Clarification, And Compliance Filing |
| ER13-366-004, -005 and ER13-367-002 |
04/16/2015 |
Southwest Power Pool, Inc. |
Order On Rehearing and Compliance Filing |
| EL11-50-001 |
04/16/2015 |
Astoria Generating Company L.P and TC Ravenswood, LLC
v.
New York Independent System Operator, Inc. |
Order On Clarification and Rehearing |
| EL11-42-001, ER12-2414-000, 001 & 002 |
04/16/2015 |
Astoria Generating Company L.P.; et al. Vs. New York Independent System Operator, Inc. |
Order On Clarification, Rehearing, And Compliance Filing |
| EL13-62-000 |
03/19/2015 |
Independent Power Producers of New York, Inc.
v.
New York Independent System Operator, Inc. |
Order Denying Complaint |
| EL07-39-006, ER08-695-004, and ER10-2371-000 |
03/19/2015 |
New York Independent System Operator, Inc. |
Order On Clarification, Rehearing, And Compliance Filing |
| ER14-543-001 |
03/19/2015 |
New York Independent System Operator, Inc.
Niagara Mohawk Power Corporation |
Order Denying Rehearing |
| ER14-543-000 |
03/19/2015 |
New York Independent System Operator, Inc.
Niagara Mohawk Power Corporation |
Order Establishing Hearing And Settlement Judge Procedures |
| ER15-37-000 |
02/19/15 |
New York Independent System Operator, Inc. |
Order Instituting Section 206 Proceeding and Directing Filing to Establish Reliability Must Run Tariff Provisions |
