Instructions for Impact Study Data


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 Voltage level (in kV):*
	7c. Total Length of Line (in miles):
	7d. Distance to Substation A (in miles):
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. 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 (MVAR):
	Lagging (MVAR):
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.	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:*
	S(1.0):
	S(1.2):

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):*

	R	jX
(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):

OA:

FA1:

FA2:

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):

jX:

66.

Zero sequence impedance (R+jX per mile on line MVA base):

jX:

67.

Positive sequence charging admittance
(in % per mile on line MVA base):*

Unit Capability Data Request Form
	What type of study will this be?