PJM - Instructions for Impact Study Data

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Data Requirements for PJM RTEP Impact Studies

Note: Changes to machine capabilities or in-service dates as originally submitted in the Impact Study Agreement (PJM Open Access Transmission Tariff Attachment N) 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 Impact Study phase.

Impact Studies are conducted to identify transmission expansion needed to maintain the system reliability given the addition of your generation on to the network.

The data that is submitted is required to perform the power flow, short circuit and dynamic simulation analyses which are necessary for the Impact Study phase.

PJM uses the following programs to perform the Impact Analysis:

PSS/E from PTI, Inc. (power flow and dynamic simulation)
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.

If the final unit specifications are not certain an approximation must be made.

When more information is available, the typical model must be replaced with an “as built” model based on the actual unit purchased.

If data is still not available and cannot be estimated please indicate by typing:

TBD and MM/DD/YY

The date indicates when you will supply us with the expected data.

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:*
	Please enter Substation(s) and kV*
8.	Maximum Summer (92º F ambient air temp.) 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. If less then use the declared Capacity rating of your project.
9.	Maximum Summer (92º F ambient air temp.) Gross MW Output:*
10.	Minimum Summer (92º F ambient air temp.) Gross MW Output:*
11.	Maximum Winter (30º F ambient air temp.) Gross MW Output:*
12.	Minimum Winter (30º F ambient air temp.) Gross MW Output:*
13.	Gross Reactive Power Capability at Maximum Gross MW Output - Please include Reactive Capability Curve (Leading and Lagging):*
14.	Individual Unit Auxiliary Load at Maximum Summer MW Output (MW/MVAR):*
15.	Individual Unit Auxiliary Load at Minimum Summer MW Output (MW/MVAR):*
16.	Individual Unit Auxiliary Load at Maximum Winter MW Output (MW/MVAR):*
17.	Individual Unit Auxiliary Load at Minimum Winter MW Output (MW/MVAR):*
18.	Station service load (MW/MVAR):*
	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.	MVA Base (upon which all reactances, resistance and inertia are calculated):*
21.	Nominal Power Factor:
22.	Terminal Voltage (kV):*

Unsaturated Reactances (on MVA Base)
23.	Direct Axis Synchronous Reactance, Xd(i):*
24.	Direct Axis Transient Reactance, X'd(i):*
25.	Direct Axis Sub-transient Reactance, X"d(i):*
26.	Quadrature Axis Synchronous Reactance, Xq(i):*
27.	Quadrature Axis Transient Reactance, X'q(i):*
28.	Quadrature Axis Sub-transient Reactance, X"q(i):*
29.	Stator Leakage Reactance, Xl:*
30.	Negative Sequence Reactance, X2(i):
31.	Zero Sequence Reactance, X0:

Saturated Reactances (on MVA Base)
32.	Saturated Sub-transient Reactance, X"d(v) (on MVA Base):
33.	Negative Sequence Reactance, X2(v):
34.	Zero Sequence Reactance, X0(v):

Resistance Values
35.	DC Armature Resistance, Ra (ohms):
36.	Positive Sequence Resistance, R1 (on MVA Base):
37.	Negative Sequence Resistance, R2 (on MVA Base):
38.	Zero Sequence Resistance, R0 (on MVA Base):

Time Constants (seconds)
39.	Direct Axis Transient Open Circuit, T'do:*
40.	Direct Axis Sub-transient Open Circuit, T"do:*
41.	Quadrature Axis Transient Open Circuit, T'qo:
42.	Quadrature Axis Sub-transient Open Circuit, T"qo:
43.	Inertia, H (kW-sec/kVA, on KVA Base):* Combined generator & turbine
44.	Speed Damping, D:
45.	Saturation Values at Per-Unit Voltage:* S(1.0) S(1.2)

Main GSU Data Request Form
46.	Number of Machine’s per GSU:
47.	Generator Step-up Transformer MVA Base:*
48.	Generator Step-up Transformer Impedance (R+jX, or % on transformer MVA Base):*
49.	Generator Step-up Transformer Reactance-to-Resistance Ratio (X/R):
50.	Generator Step-up Transformer OA/FA/FA Rating (MVA):
51.	Generator Step-up Transformer Low-side Voltage (kV):*
52.	Generator Step-up Transformer High-side Voltage (kV):*
53.	Generator Step-up Transformer Tertiary Voltage (kV): If Applicable Must Be Submitted
54.	Generator Step-up Transformer Off-nominal Turns Ratio:
55.	Generator Step-up Transformer Number of Taps and Step Size:
56.	High Voltage Winding Connection (i.e. wye grounded, delta):*
57.	Low Voltage Winding Connection (i.e. wye grounded, delta):*
58.	Tertiary Voltage Winding Connection (i.e. wye grounded, delta): If Applicable Must Be Submitted
59.	In addition, please indicate whether the GSU is shared with other units.


Transmission Line Data
60.	Line length from main transformer high-side to Point of Interconnection:
61.	Voltage level (kV):
62.	Conductor type:
63.	Transmission line MVA base:
64.	Positive sequence impedance (R+jX per mile on line MVA base):
65.	Zero sequence impedance (R+jX per mile on line MVA base):
66.	Positive sequence charging admittance (in % per mile on line MVA base):

In addition please attach to this form the up-to-date wind model package which applies for PSS/E

AppendixGenerator, Exciter, Governor, Stabilizer, Excitation Limiter and Current Compensating Models

The equipment models listed below are those available for use in PSS/E. Each model can have unique data requirements.

The minimum modeling required for dynamic simulation is a generator model, and an exciter model.

The manufacturer of your equipment should be able to provide the proper model or an equivalent. If you cannot determine the exact PSS/E model, you must submit a Control/Block Diagram for the piece of equipment in question.

Generator Models

Please select the model from the following list*

Static Var Compensator (SVC) and Frequency Changer Models

Please select the SVC from the following list or add a new SVC by selecting OTHER and uploading the model. You must add a model if you select OTHER.

Excitation System Models

An exciter model is a minimum modeling requirement for dynamic simulation.

Additionally, the exciter model in certain cases is needed to ensure that the unit is transiently stable.

Please select the model from the following list or add a new Excitation Model by selecting OTHER and uploading the model. You must add a model and any parameters to your selection.*

Prime Mover and Governor Models

The prime mover governor model is required to demonstrate long-term stability of the unit in response to frequency oscillations. Please select the model from the following list. You must add a model and any parameters to your selection.

Power System Stabilizer Models

Power System Stabilizer must be added to the exciter circuits to force stability. However, devices such as Power System Stabilizers, as well as Excitation Limiters and Compensating devices, are less frequently applied and are modeled if the equipment will be used.

Please select the model from the following list. If Non-Applicable then select Non-Applicable.

Minimum Excitation Limiter Models

Please select the model from the following list. If Non-Applicable then select Non-Applicable.

Maximum Excitation Limiter Models

Please select the model from the following list. If Non-Applicable then select Non-Applicable.

Compensating Models

Please select the model from the following list. If Non-Applicable then select Non-Applicable.

If you have any questions, please contact