-------------------------- --------------------- -----------------------
                                                   

                                                   

  **United States                                  **Department of
  Government**                                     Energy**

                             **Bonneville Power    
                             Administration**      

                                                   

                                                   
  -------------------------- --------------------- -----------------------

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| **D | April 5, 2005                                                  |
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| *   | TOM/PPOC2                                                      |
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| **S | 2005 Spring / Summer PDCI Probing Signal Test Plan             |
| UBJ |                                                                |
| ECT |                                                                |
| :** |                                                                |
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+-----------------------+-----------------------+-----------------------+
| John Haner -- TOM     | Melvin Rodrigues --   | Tedd Snodgrass -- TOV |
|                       | TOP                   |                       |
| Peggy Olds -- TOT     |                       |                       |
|                       | Rich Ellison - TOD    |                       |
+-----------------------+-----------------------+-----------------------+

##### SUMMARY

Under this test plan probing signal tests will be applied regularly to
the Pacific HVDC Intertie during the late spring -- early fall 2005
operating period. This will be continuation of regular probing tests
conducted during 2003 and 2004 summer operating seasons. The tests are
conducted to get early detection of abnormalities in system damping.

The main objectives of these tests are:

a)  measure system damping levels to correlate them with the system
    loading conditions

b)  correlate recorded and simulated mode shape and damping to
    improve/validate study models

c)  use probing tests for generator control and performance validation.

The test duration is from May 9, 2005 to Septmber 20, 2005.

The test will be performed every day at 14:20, 15:20 and 16:20 if any of
the following conditions is met:

-   Grand Coulee -- Malin phase angle is greater than 52 degrees, or

-   California -- Oregon Intertie flow is greater than 3,700 MW, or

-   a test is requested by a WECC member to verify generating unit
    performance (\>500 MW). Such request should be given a day ahead of
    the scheduled test.

Please see attached historic data for 2003 - 2004 seasons on COI flows
and Coulee-Malin phase angle.

PDCI Probing Signal:

Three-cycle 0.25 Hz +/- 125 MW probes will be used to stimulate the
power oscillations. The probe will be repeated within one minute. This
is similar to the tests done during 2003 and 2004 operating seasons.

PDCI has to be above 900 MW to perform the test.

**II. TEST INITIATION**

Test coordination will be as follows:

1.  Jim Burns will schedule the tests through the BPA outage dispatcher.

2.  Jim Burns (BPA technical staff) will post proposed test dates on the
    BPA Web page.

3.  The day before each test, BPA will send a message on the WECC Net
    notifying of the tests.

4.  10 minutes proior to the test time, BPA dispatcher verifies that
    system conditions are met (Grand Coulee-Malin phase angle is greater
    that 52 degrees, or COI flow is greater than 3,700 MW, or a power
    plant performance test is conducted) and confirms the test with
    Celilo operator.

5.  If there are concerns about abnormal system conditions, BPA
    dispatcher should be contacted as early as possible to cancel a
    test. The test will be resumed the next hour after the system
    returns to normal.

6.  The probing signal will be injected by an operator of Celilo
    converter station. The operator will clear with the BPA dispatcher
    before the signal injection.

Submitted by:

William A. Mittelstadt -- TOM Dmitry Kosterev - TOM

Approved: \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ Date:
\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_

Manager, Suppport Services for Network Planning -- TOM

Approved: \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ Date:
\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_

Manager, Network Planning -- TOP

Approved: \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ Date:
\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_

Manager, Technical Operations --TOT

Approved: \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ Date:
\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_

Manager, Dittmer Dispatch - TOD

Approved: \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ Date:
\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_

Manager, Munro Dispatch - TOV

cc***:***

V.VanZnadt -- T/DITT2

B.Silverstein - TO

J.Haner -- TOM

R. Ellison -- TOD/DITT1

P.Olds - TOT/DITT2

T. Snodgrass - TOV/MEAD

B.McManus -- TOT/DITT2

J. Burns - TOT/DITT1

R. Spence -- TOT/DITT2

S.Wiggerhaus - TOT

J.Gronquist -- TOT

M.Rodrigues -- TOP

G.Keenan -- TOM

W.Mittelstadt -- TOM

C.Taylor - TOM

D. Kosterev -- TOM

D. Chase -- TFRS/CELILO

L. Anderson -- TFRS/CELILO

W.Litzenberger -- TNP-PPO2-1

J. Bernhardsen -- TO/DITT2 - NWSC

Dittmer Outage Dispatcher -- TOD/DITT1

Dittmer System Dispatcher -- TOD/DITT1 (2 copies)

Official File - TOP (ED-21-15)

WAMittelstadt/DKosterev 4/04/05 (ProbTesting.doc)

# Historic System Conditions

![](media/image1.wmf){width="5.99375in" height="4.102777777777778in"}

![](media/image2.wmf){width="5.992361111111111in" height="3.64375in"}