1. FRTPSPS (Helms RAS) Modification of Cottle 230kV Bus
Substations
Addition of Distribution Transformer
March 2018

2. Southern PG&E Area Including Greater Fresno Area
Gregg
Panoche
Helms
Gates
Los Banos
Moss Landing
Morro Bay
Diablo
Canyon
Midway
Bellota
Tesla
Kings
River
McCall
Arco
To Southern
California
Bellota-Gregg #1 & #2 230KV
Los Banos-Panoche #1 & #2 230KV
Dos Amigos-Panoche 230KV
Coburn
Gates - Panoche #1 & #2 230kV
Gates-McCall 230kV
Gates-Gregg 230kV
Mc Call Midway #1 & #2 115kV
Tranquillity
Mustang 2

3. FRTPSPS Background
Outage detection devices are located at the following stations with the addition of Mustang and Tranquillity:
Bellota
Borden
Cottle
Gates
Gregg
Helm
Herndon
Kearney
McCall
Panoche
Wilson
Warnerville (CCSF)
New Melones (WAPA)
Mustang (Dec 2015)
Tranquillity (Feb 2016)

4. FRTSPS Station Locations
The location of the monitoring station locations is listed below:
COTTLE SUBSTATION VICINITY
WARNERVILLE SUBSTATION VICINITY
NEW MELONNES SUBSTATION VICINITY
WILSON SUBSTATION VICINITY
BELLOTA SUBSTATION VICINITY
BORDEN SUBSTATION VICINITY
GREGG/HERNDON SUBSTATION VICINITY
HELMS PSP PH VICINITY
MCCALL SUBSTATION VICINITY
KEARNEY SUBSTATION VICINITY
HELM SUBSTATION VICINITY
PANOCHE SUBSTATION VICINITY
GATE SUBSTATION VICINITY
FOC VICINITY
MUSTANG SUBSTATION VICINITY
TRANQUILLITY SUBSTATION VICINITY

5. FRTPSPS Background (cont.)
The Greater Fresno Area load is served by a network of 230 and 115 kV import lines and by local generation.
The area load, including the Helms PGP facility while in pump mode is constrained by the capacity of the import lines. The forced outage of any of several import lines or of the Gates 500/230 kV bank can cause thermal overloads on the remaining lines.
Three SPS / RAS were installed in the Fresno Area to increase the available hours that Helms can pump.
The initial HRAS was placed in service in the early 1990’s with the HTT-RAS installed in early The Gates TB11 SPS was installed in 2007.
The FRTPSPS has replaced and combined the HTT-RAS, Gates TB-11 SPS and portions of the HRAS (except the Pacific Inter Tie, the Helms 230kV Line #2 Transfer Trip for generation tripping and the SFGO Manual Pump trip) into one fully redundant scheme utilizing C37.94 fully redundant digital communication paths.

6. FRTPSPS Background/Modifications
This scheme was presented to WECC in July 2014 and approved in November 2014 as a LAPS scheme.
This modification is installing a new 45MVA 230kV/17kV Distribution Transformer Bank to Cottle Substation.
The installation will include an additional 230kV breaker.
The addition of the 230kV breaker modifies the existing Cottle Ring Bus and requires a change to outage detection logic.
The expected on-line date for the 230kV breaker installation is 4/5/2018.
Existing devices located at Cottle Substation will be rewired and outage detection logic will be modified to include the addition of the new 230kV breaker.
No logic changes are required to the main controller.

7. FRTPSPS Cottle Modification
Over all single line of the system before the Cottle CB 2042 TB-3 Addition:

8. FRTPSPS Cottle Modification
Over all single line of the affected system:

9. Response To Detected Event
Line/Element Outage is detected.
Data is sent to the FOC main controller.
FOC main controller sends appropriate trip signal to Helms PGP
Selected Helms PGP pump/pumps will trip via normal shutdown (86N) in approximately 5 – 10 seconds.
If the Selected Helms PGP unit breaker is not opened within 20 seconds the scheme will trip the selected unit (86E) tripping relay.

10. System Control/Monitoring
Field Elements
Cut-in/Cut-out feature.
In cutout mode the train is un-available.
Test Feature
Allows for outage signal to be sent via front panel pushbutton.
Alarms*
Communication channel failure alarm,
IRIG-B Clock Failure,
line status disagreement (CB indicates open with current present)
Device failure
* Alarms are sent to GCC and FOC.

11. FRTPSPS Cottle Modification
Existing Cottle Line Outage Detection Logic.

12. FRTPSPS Cottle Modification
Propose Cottle Line Outage Detection Logic

13. FRTPSPS Cottle Cottle Modification
PG&E requests approval from the RASRS Committee for the modifications to the FRTP SPS at Cottle to incorporate the installation of CB 2052 in conjunction with the new 230kV/17kV 45MVA distribution transformer.
This scheme was classified as LAPS in 2014, however the WECC database indicates the classification is a WAPS, the WECC database should be corrected.
Mention DOO, Scada Screens, and training are being addressed.

14. Questions & Comments???