Generator As Is Study Data

Generator As Built Data Form Checklist
  1. Generator As Built Data Sheet
  2. One-line drawing showing:
    1. Generator Unit(s)
    2. GSU (transformers)
    3. Breakers
    4. Point of Interconnection
  3. Generator or wind turbine model selected
  4. Operating Restrictions or Procedures

    For traditional generators also provide

  5. Generator performance curves
    1. Reactive Capability Curve (D-Curve)
    2. Generator Saturation Curve
    3. Vee Curve
  6. Exciter Model and Block Diagram
  7. Governor Model and Block Diagram
  8. Power system stabilizer model and block diagram

    For wind generators also provide

  9. Wind turbine model for PSS/E
    1. Modeling
    2. Generator Saturation Curve

Data Requirements for PJM RTEP As Built Data

Note: Changes to machine capabilities or in-service dates as originally submitted with the Feasibility Study Agreement (PJM Open Access Transmission Tariff Attachment N) or the System Impact Study Agreement (PJM Open Access Transmission Tariff Attachment N-1) must be formally communicated to the appropriate PJM project manager.

This form is to submit data for proper modeling of your respective Queue Project in the Facilities Study phase as well as submissions to be utilized in subsequent modeling required during the RTEP process. This form is also used for existing generators who are increasing their capacity rights or who have changed their machine/GSU data.

The data that is submitted is required to perform the power flow, short circuit and dynamic simulation analyses which are necessary for the studies discussed above.

PJM uses the following programs to perform the Impact Analysis:

  1. PSS/E from PTI, Inc. (power flow and dynamic simulation)
  2. Aspen from Advanced Systems for Power Engineering, Inc. (short circuit))

Minimum requirement fields are indicated by *

All data must be provided on an individual unit basis.

For example, a combined cycle plant with two identical Combustion Turbines (CT) and one Steam Turbine (ST) would have two submissions of the data request form. One submission for the CT and one submission for the ST.

PJM understands that any data you had provided for previous studies may have been typical data for a proposed project. However, now, PJM requires that you submit unit specific As Built Data for use in all future reliability studies.

In addition, please provide models for the Excitations System(s), Power System Stabilizer(s), prime mover governor(s), etc. For each piece of electrically dynamic equipment (rotating or static) to be represented in the simulation, a PSS/E model must be used as part of the reliability studies. A list of models in the PSS/E dynamics library is located in an Appendix at the end of this form. Please indicate the appropriate models to be used in the simulation of each piece of equipment at the facility to be modeled. If you are unable to locate the appropriate model in the Appendix, please contact the individual designated at the top of this form for assistance in determining if an existing model may be used. If no model is available in the Appendix which can be used for a piece of equipment, you must obtain a PSS/E model (or equivalent as allowed by the individual designated at the top of this form) from the manufacturer of the piece of equipment.

Please note that many of the parameters needed for constructing the model are available from the manufacturer’s commissioning studies and tests. If a PSS/E model cannot be obtained for a particular piece of equipment, you must submit a Control/Block Diagram for the piece of equipment. Any additional controls installed for excitation systems, stabilizers, turbine governors, as well as excitation limiters, compensator settings, etc. must be provided.

Generator MW Model

Generator Model

Queue AC2 is a transitional five-month long queue that will conclude on March 31, 2017. Added costs associated with attachment submissions in Month 6 do not apply to this queue. On April 1, 2017, the queues will resume six-month durations.
Unit Capability Data Request Form
  What type of study will this be?
1. Interconnection customer name:*
2. Name of individual completing form:*
3. E-mail Address:*
(Individual completing the form)
4. Phone:*
(Individual completing the form)
5. Queue letter and position / Unit ID:*
6. Primary fuel type:*
7. Selected Point of Interconnection:*
  7a. Please enter Substation(s):*
 Substation A (From):
  Substation B (To):
  7b. Please enter kV:*
  7c. Total Length of Line:
  7d. Distance to Substation A (in miles): 
8. Maximum Summer Net MW Output:*
  • Your project's declared MW’s, as first submitted in Attachment N.
  • If modified use the value submitted in the Impact Study Agreement.
  • less then use the declared Capacity rating of your project.
9. Maximum Summer Gross MW Output:*
10. Minimum Summer Gross MW Output:*
11. Maximum Winter Gross MW Output:*
12. Minimum Winter Gross MW Output:*
13. Gross Reactive Power Capability at Maximum Gross MW Output - Please include Reactive Capability Curve:*
  Leading (MVAR):
  Lagging (MVAR):
14. Individual Unit Auxiliary Load at Maximum Summer MW Output:*
15. Individual Unit Auxiliary Load at Minimum Summer MW Output:*  
16. Individual Unit Auxiliary Load at Maximum Winter MW Output:*
17. Individual Unit Auxiliary Load at Minimum Winter MW Output:*  
18. Station service load:*
  Station load connected to:*
19. Please provide any comments on the expected capability of the unit:*  
GSU losses are expected to be minimal.
Unit Generator Dynamics Data Request Form
20. Total Number of Machines:
21. MVA Base (upon which all reactances, resistance and inertia are calculated):*
22. Nominal Power Factor:*
23. Terminal Voltage (kV):*
Unsaturated Reactances (on MVA Base)
24. Direct Axis Synchronous Reactance, Xd(i):*
25. Direct Axis Transient Reactance, X'd(i):*
26. Direct Axis Sub-transient Reactance, X"d(i):*
27. Quadrature Axis Synchronous Reactance, Xq(i):*
28. Quadrature Axis Transient Reactance, X'q(i):*
29. Quadrature Axis Sub-transient Reactance, X"q(i):*
30. Stator Leakage Reactance, Xl:*
31. Negative Sequence Reactance, X2(i):*
32. Zero Sequence Reactance, X0:*
Saturated Reactances (on MVA Base)
33. Saturated Sub-transient Reactance, X"d(v) (on MVA Base):*
34. Negative Sequence Reactance, X2(v):*
35. Zero Sequence Reactance, X0(v):*
Resistance Values
36. DC Armature Resistance, Ra (ohms):*
37. Positive Sequence Resistance, R1 (on MVA Base):*
38. Negative Sequence Resistance, R2 (on MVA Base):*
39. Zero Sequence Resistance, R0 (on MVA Base):*
Time Constants (seconds)
40. Direct Axis Transient Open Circuit, T'do:*
41. Direct Axis Sub-transient Open Circuit, T"do:*
42. Quadrature Axis Transient Open Circuit, T'qo:*
43. Quadrature Axis Sub-transient Open Circuit, T"qo:*
44. Inertia, H (kW-sec/kVA, on KVA Base):*
Combined generator & turbine
45. Speed Damping, D:*
46.Saturation Values at Per-Unit Voltage:*  
Main GSU Data Request Form
47. Number of Machine’s per GSU:*
48. Generator Step-up Transformer MVA Base:*
49. Generator Step-up Transformer Impedance (R+jX, or % on transformer MVA Base):*
(a) High-side to Low-side:*
(b) High-side to Tertiary: 
(c) Low-side to Tertiary: 
For two winding transformers complete item (a). For three winding transformers complete items (a), (b) and (c).
50. Generator Step-up Transformer Reactance-to-Resistance Ratio (X/R):*
51. Generator Step-up Transformer OA/FA1/FA2 Rating (MVA):
52. Generator Step-up Transformer Low-side Voltage (kV):*
53. Generator Step-up Transformer High-side Voltage (kV):*
54. Generator Step-up Transformer Tertiary Voltage (kV):*
If Applicable Must Be Submitted
55. Generator Step-up Transformer Off-nominal Turns Ratio:*
56. Generator Step-up Transformer Number of Taps and Step Size:
  Number of Taps:
  Step Size:
57. High Voltage Winding Connection (i.e. Wye, Delta, Wye Gnd, etc.):*
58. Low Voltage Winding Connection (i.e. Wye, Delta, Wye Gnd, etc.):*
59. Tertiary Voltage Winding Connection (i.e. Wye, Delta, Wye Gnd, etc.):*
If Applicable Must Be Submitted
60. In addition, please indicate whether the GSU is shared with other units.*  
Transmission Line Data
61. Line length in miles from main transformer high-side to Point of Interconnection:*
62. Voltage level (kV):*
63. Conductor type (ACSR, AAC, AAAC, ACAR, etc.):*
64. Transmission line MVA base:*
65. Positive sequence impedance (R+jX per mile on line MVA base):
66. Zero sequence impedance (R+jX per mile on line MVA base):
67. Positive sequence charging admittance
(in % per mile on line MVA base):*

If you have any questions, please contact