PROPOSED STIPULATION NO. 3: ELECTRIC TRANSMISSION FACILITIES

1. The methodology of the studies made to support the Application, which are discussed herein, requires that they either be performed by, or under the auspices of, the New York Independent System Operator (NYISO), or be approved by the NYISO Staff.

2. The Application will include an Interconnection Study for each phase of the TGE Project, consisting generally of a design study and system reliability impact study. The Interconnection Study will include the necessary technical analyses (Thermal, Voltage, Short Circuit and Stability) to evaluate the impact of the interconnection of the Project on the Con Ed transmission system and the New York State transmission system. TGE will also evaluate the impact on the New England Independent System Operator (NE-ISO) system and Pennsylvania-Jersey-Maryland (PJM-ISO) systems. Both peak (summer and winter) and off-peak load conditions will be investigated, and extreme contingency scenarios will be evaluated at various load levels in accordance with the Northeast Power Coordinating Council (NPCC) "NPCC Basic Criteria for the Design and Operation of Interconnected Power System," the NYISO Transmission Expansion and Interconnection Manual and the interconnection criteria and planning criteria of the Transmission Owner (TO) with whose system the Project will interconnect. The analysis will include the currently available data regarding the requirements of these systems, and the study will be done in consultation with Central Hudson Gas & Electric Corporation (CHG&E), Consolidated Edison Company of New York, Inc. (ConEd), Long Island Power Authority (LIPA), New York Power Authority (NYPA), New York State Electric and Gas Corporation (NYSEG), Niagara Mohawk Power Corporation (NMPC) Orange and Rockland Utilities, Inc. (O&R), Rochester Gas & Electric Corporation (RG&E), NE-ISO, and PJM-ISO. The Interconnection Study will include all high-voltage connections between the Project site and the Con Ed system as well as any other system upgrades required. The Application will include a tabulation showing compliance/non-compliance with the criteria of the following entities that are affected: CHG&E, ConEd, LIPA, NMPC, NYPA, NYSEG, O&R, RG&E, NYISO, PJM, NE-ISO, NPCC, and the North American Electric Reliability Council (NERC).

3. Thermal Analysis: The Applicant will calculate transfer limits for the base year 2003 system for the following interfaces: LIPA, ConEd cable system, Upstate New York (UPNY)-Con Ed, Central East, Total East, and UPNY-SENY. The Applicant will also calculate the transfer limits for the following interfaces: LIPA, PJM-NY, and NE-NY. The Applicant will evaluate the thermal performance of all pertinent system components affected by the Project, such as transmission cables, transmission lines, and transformers during normal and emergency conditions established in accordance with the criteria listed in paragraph 2 above, to ensure that these components operate within their rated load capabilities.

4. Voltage Analysis: The Applicant will evaluate the voltage performance of the system during normal and emergency conditions to ensure that established voltage limits are maintained at all pertinent system buses. Winter and summer peak and off-peak system load conditions will be analyzed. Emergency conditions examined will include the most severe contingencies established in accordance with the criteria listed in paragraph 2 above. The voltage conditions will be evaluated prior to and following those contingencies.

5. Stability Analysis: The Applicant will evaluate the transient stability performance of the Project with the interconnected system during and after the most severe system disturbances established in accordance with the criteria listed in paragraph 2 above. Summer and winter peak and off-peak system load conditions will be demonstrated for the following contingencies including but not limited to:

(a) A permanent three phase fault on any generator, transmission circuit, or bus section, with normal clearing; (b) Permanent phase to ground fault on any generator, transmission circuit, transformer or bus section, with delayed fault clearing; (c) Loss of any element without a fault; (d) Permanent phase to ground fault on a circuit breaker, with normal fault clearing; and (e) Loss of a double circuit tower.

In addition, system stability during and after the following extreme contingencies (which exceed in severity the contingencies (a) through (e) above) will be analyzed, as specified in Section 7 of NPCC's Basic Criteria entitled "Extreme Contingency Assessment" to determine that there are no effects that may cause widespread system disturbance, including but not limited to:

(f) Loss of the entire capability of a generating station; (g) Loss of all lines emanating from a generating station, switching station or substation; (h) A permanent three phase fault on any generator, transmission circuit, transformer or bus section, with delayed fault clearing; and (i) The sudden loss of a large load or major load center.

6. Short Circuit Analysis: The Applicant will evaluate the effect of interconnecting the Project on the fault duty levels of individual breakers at all 34.5 kV, 46 kV, 69 kV, 115 kV, 138 kV, 230 kV and 345 kV substations for ConEd and NYPA. The Applicant will also evaluate the fault duty of all transmission voltage level substations for CHG&E, LIPA, NMPC, NYSEG, O&R, RG&E, PJM and NE-ISO. The analysis will be performed in accordance with the criteria listed in paragraph 2 above. Fault duties will be expressed in symmetrical interrupting values, and will include simulations for three types of faults:

(a) Three phase-to-ground fault; (b) Two phase-to-ground fault; and (c) Single phase-to-ground fault.

Where the ratings of the existing breakers are not adequate to interrupt the fault duties determined, alternate measures will be determined or those breakers will be designated to be upgraded to adequate interrupting ratings.

7. Evaluation of Protective Relays: The applicant will evaluate any protective relay changes that may be necessary and provide such proposed changes to CHG&E, ConEd, LIPA, NYPA, NMPC, NYSEG, O&R, RG&E, NYISO, PJM, and NE-ISO. Alternatively, the Applicant may provide a document stating that such a document is not necessary at this time, and state when it will be provided.

8. Auto-Reclosing: If auto-reclosing is applicable to the proposed facility and the interconnection to the transmission system, the Applicant shall demonstrate that the machines to be used will withstand high speed automatic reclosing and submit a report demonstrating the ability.

9. Based on the aforementioned Interconnection Study, the Application will include:

(a) An evaluation of the potential significant impacts of the Project and its interconnection to the New York State transmission system reliability at a level of detail that reflects the magnitude of the impacts. This evaluation shall include transmission systems under the control of the NYISO, PJM-ISO, NE-ISO and transmission systems under the control of ConEd; (b) An analysis of the impacts of the Project and associated Interconnection facilities on voltage stability, thermal limitations, short circuit and transmission interface capabilities as prescribed in the NYISO or the New York State Reliability Council (NYSRC) and NPCC (as applicable) planning and operating standards; (c) Discussion of the benefits and detriments of the Project on ancillary services and the electric transmission system, including impacts associated with reinforcements and new construction necessary as a result of the Project; (d) An analysis of any reasonable alternatives that would mitigate adverse reliability impacts, if any, of the Project on the New York State transmission system; and maintain voltage, stability, thermal limitations, and short circuit capability at levels consistent with standards promulgated by NERC, NYISO, PJM-ISO and NE-ISO, or the NYSRC, as applicable; and (e) An estimate of the increase or decrease in the total transfer capacity across each affected interface. If a forecasted reduction in transfer capability across affected interfaces violates reliability requirements, an evaluation of reasonable corrective measures that could be employed to mitigate or eliminate said reduction will be included.

PRE-APPLICATION PROCESS

10. The draft scope of the Interconnection Study will be provided to system protection and system planning engineers of DPS Staff, NYISO Staff, CHG&E, ConEd, LIPA, NYPA, NYSEG, NMPC, O&R, RG&E, PJM-ISO and NE-ISO for comments and review. Comments received within four weeks of the provision of the draft scope will be incorporated into the scope and a copy of the comments will be provided to DPS staff.

11. Upon finalization, the scope of Interconnection Study will be provided to DPS Staff, NYISO Staff, CHG&E, Con Ed, LIPA, NYPA, NYSEG, NMPC, O&R, RG&E, PJM-ISO and NE-ISO. A copy of the transmittal will be provided to DPS Staff.

12. The applicant, through the NYISO processes, will keep DPS Staff, NYISO Staff, PJM-ISO, NE-ISO, ConEd, CHG&E, LIPA, NYPA, NYSEG, NMPC, O&R and RG&E advised of the Interconnection Study as it progresses.

13. DPS Staff may request technical conferences with the NYISO or its designee and the applicant, together, from time to time to discuss the Interconnection Study as it progresses.

14. All updates and draft reports will be provided concurrently to DPS Staff, New York TOs, and NYISO Staff (including computer input data and output cases that are used in performing the analysis).

COMPLIANCE DETERMINATION REQUIREMENT

15. Upon completion, the draft Interconnection Study will be provided to system protection and system planning engineers of DPS Staff, NYISO Staff, CHG&E, ConEd, LIPA, NYPA, NYSEG, NMPC, O&R, RG&E, PJM-ISO, and NE-ISO for comments and review; the Applicant will arrange a technical conference to explain the scope, inputs, assumptions, change cases, and other relevant parameters of the Interconnection Study. Comments received within six weeks of the provision of the draft study will be incorporated into the final study and a copy of all the comments will be provided to DPS Staff.

CONSULTATION PROCESS

16. Upon receipt, the Applicant will immediately provide to DPS Staff any TPAS (or NYISO, as applicable), PJM ISO or NE ISO response to the Interconnection Study.

17. The applicant agrees to provide documentation demonstrating that the Project meets the New York TOs requirements and is proceeding through the NYISO Staff approval process, that the Project has consulted with the NE-ISO and the PJM-ISO, and that all the necessary studies have been completed and submitted to NYISO Staff for approval. Copies of such studies will be attached to the Article X application.

18. The Applicant agrees to immediately notify, or have NYISO notify, the PJM-ISO and NE-ISO about the Project and work cooperatively with those ISOs on any joint studies that are required.

19. The Applicant agrees to provide concurrently to DPS Staff copies of any draft or final studies submitted to those ISOs as well as any computer input data and output data. Comments provided by those ISOs will be provided to DPS Staff as they are received by the Applicant.

CONFIDENTIALITY

20. If trade secret protection is requested, DPS Staff will have access to the allegedly confidential information either by receiving possession pursuant to 16 NYCRR Section 6-1.3 c (2) or pursuant to a protective order made by the Presiding Examiner. The Applicant agrees to cooperate in seeking any necessary protective order so that DPS Staff may have such information without delay.

ELECTROMAGNETIC FIELDS

21. The application will include an analysis with all input and output data showing that operation of the proposed electric transmission line(s) that interconnect the proposed generation facility will comply with the (a) Public Service Commission's applicable electric field strength standards, as set forth in Opinion 78-13, and (b) applicable provisions of the Commission's Interim Policy Statement on Magnetic fields, dated September 11, 1990.

[Next Section (Proposed Stipulation 4)]     [Table of Contents]    [Home Page]