Post on 29-Dec-2015
Gol
den
Val
ley
Ele
ctric
Ass
oc.
Inc
© 2
012
GV
EA
. A
ll rig
hts
rese
rved
.
GVEA BESS
Expected and Actual Performance
Dan Bishop
Golden Valley Electric Assoc
Fairbanks, AlaskaUSA
June 20122
Gol
den
Val
ley
Ele
ctric
Ass
oc.
Inc
© 2
012
GV
EA
. A
ll rig
hts
rese
rved
.
Table of Contents
BESS Background
BESS 18 Month Availability Guarantee
BESS Hardware Issues
BESS Lessons Learned
Actual Performance
Future Uses
June 20123
Gol
den
Val
ley
Ele
ctric
Ass
oc.
Inc
© 2
012
GV
EA
. A
ll rig
hts
rese
rved
.
BESS - BACKGROUND
GVEA - RUS CO-OP in Alaska
Typical Short on Real Spinning Reserves
Power Supply Outages Shed Customers to Stabilize System
BESS Conceived as Part of a New Intertie Project 1993
Project Delayed Due to EIS Process on Intertie 2000
Selected a Consortium of ABB and Saft
$30.3M
June 20124
Gol
den
Val
ley
Ele
ctric
Ass
oc.
Inc
© 2
012
GV
EA
. A
ll rig
hts
rese
rved
.
BESS - BACKGROUND
Project Started October 2001
27 MW for 15 Minutes ABB Converter Technology (46 MVA)
Saft Liquid Filled Ni-Cd Technology 4 Strings (13,760 total cells)
5kV DC Link Voltage
Commercial Startup in September 2003 Begin 18 Month 98% Availability Period
Project Completed December 2003
June 20125
Gol
den
Val
ley
Ele
ctric
Ass
oc.
Inc
© 2
012
GV
EA
. A
ll rig
hts
rese
rved
.
BESS BACKGROUND – Operating Modes
Spinning Reserve
Automatic Scheduling
AGC
Support for Scheduled Load Increases
PSS
Charging
Primary Use is Voltage Support (VAr) Converter is capable of full power circle output
June 20126
Gol
den
Val
ley
Ele
ctric
Ass
oc.
Inc
© 2
012
GV
EA
. A
ll rig
hts
rese
rved
.
BESS – BACKGROUND - OPERATING MODES
June 20127
Gol
den
Val
ley
Ele
ctric
Ass
oc.
Inc
© 2
012
GV
EA
. A
ll rig
hts
rese
rved
.
BESS – BACKGROUND - OPERATING MODES
Spinning Reserve Mode Critical due to nature of electrical system
Lack of “Real” Spinning Reserve due to cost of oil-fired generation
GVEA Purchases Non-Firm Energy from Anchorage Utilities We are Responsible for the Spinning Reserves if Unit(s) Trips
SCADA Loads BESS table with Spinning Reserve Obligation Operates as part of SILOS (25%, 25%, 50%)
June 20128
Gol
den
Val
ley
Ele
ctric
Ass
oc.
Inc
© 2
012
GV
EA
. A
ll rig
hts
rese
rved
.
BESS – BACKGROUND - OPERATING MODES
Automatic Scheduling Mode For Problems Internal to the GVEA Transmission System
Monitors Generator & Remote Transmission Substation Breakers Power Flow thru Breaker, Trip Circuit Current & Breaker Status
35 1
OR SUBSTATION BREAKERSREMOTE GENERATOR
BESS
SCADA CONTROL CENTER
GATE WAY GATE WAY GATE WAY GATE WAY
AUTO SCHEDULE
MW SETPOINT TABLE
PSR
2930
12
BREAKER TRIP SIGNALS
VIA MICROWAVE
.
.
.
.
.
.
MW
FLO
W T
HRU BREAKERS
VIA M
ICRO
WAVE
FOR EACH BREAKER INPUT (30 TOTAL)
UPLOADED INTO HMI TABLE
CALCULATED MW SETPOINT
VIA FIBER
HMI
AUTO SCHEDULE
MW SETPOINT TABLE
June 20129
Gol
den
Val
ley
Ele
ctric
Ass
oc.
Inc
© 2
012
GV
EA
. A
ll rig
hts
rese
rved
.
BESS - 18 MONTH AVAILABILITY GUARANTEE
98% Availability for 18 Months 262.8 Hours
September 19, 2003 - Start
Diode Failure(s) October 21, 2003 – BESS Offline for 70 Hours
June 2004 – Converter Maintenance
July 2004 – Two Separate PSR Board Failures
March 18, 2005 – Successful Completion Down Time = 111 Hours
99.2 % Availability
June 201210
Gol
den
Val
ley
Ele
ctric
Ass
oc.
Inc
© 2
012
GV
EA
. A
ll rig
hts
rese
rved
.
BESS – HARDWARE ISSUES
Diode Failures
Board Failures
Losing Air Pressure in the Cooling System
Sentry (BMS Modules)
Battery Cells
June 201211
Gol
den
Val
ley
Ele
ctric
Ass
oc.
Inc
© 2
012
GV
EA
. A
ll rig
hts
rese
rved
.
BESS – HARDWARE ISSUES - Sentry Device
June 201212
Gol
den
Val
ley
Ele
ctric
Ass
oc.
Inc
© 2
012
GV
EA
. A
ll rig
hts
rese
rved
.
BESS - HARDWARE ISSUES - Sentry Device
344 Sentries/ String; 1376 Total
String would Fail to Complete Sentry Logging Process
Individual Sentry Failures Turned out to be an ESD Issue
Low Voltage Communication Wire Extended over the High Voltage Side of the PCB.
June 201213
Gol
den
Val
ley
Ele
ctric
Ass
oc.
Inc
© 2
012
GV
EA
. A
ll rig
hts
rese
rved
.
BESS – HARDWARE ISSUES - Sentry ESD Solution
June 201214
Gol
den
Val
ley
Ele
ctric
Ass
oc.
Inc
© 2
012
GV
EA
. A
ll rig
hts
rese
rved
.
BESS – HARDWARE ISSUES – Battery Cells
December 2003; Initial Installation Transit or Other Damage – 15 Cells
Low Voltage Problems – 7 Cells Rejected
June 2004 Leaking Due to Transit Damage – 3 Cells Rejected
Severe Reversal / Electrolyte Ejection – 3 Cells Rejected
April 2005 Severe Reversal / Low Capacity – 4 Cells Rejected
2008 SOH Issue Warranty replacement of two strings with improved cells.
June 201215
Gol
den
Val
ley
Ele
ctric
Ass
oc.
Inc
© 2
012
GV
EA
. A
ll rig
hts
rese
rved
.
BESS – LESSONS LEARNED - SPINNING RESERVES
June 201216
Gol
den
Val
ley
Ele
ctric
Ass
oc.
Inc
© 2
012
GV
EA
. A
ll rig
hts
rese
rved
.
BESS - LESSONS LEARNED
Run Time Predictor Functionality Originally Fixed MW Values that showed Runtime (Minutes)
AGC and Load Shed Applications Needed a 15 Minute MW Value.
Charge Mode Modification – Modify Auto Start & Add Ability to Turn On/Off From Dispatch
Q (VAr)-Oscillations – 20 Hz Software Filter
RampStandard VS RampFast Transition Between Modes 4 MW/Minute VS 2500 MW/Minute
June 201217
Gol
den
Val
ley
Ele
ctric
Ass
oc.
Inc
© 2
012
GV
EA
. A
ll rig
hts
rese
rved
.
BESS – Actual Performance
BESS Statistics 388 Events to Date (November 2003 – June 2012)
Recent Event - May 26, 2012 26-27 MW for 9 minutes, then ramped down at 4MW/minute due to a fault on the Alaska Intertie
651 MW-hrs
Availability 99.14% 9/1/2010-6/19/2012
June 201218
Gol
den
Val
ley
Ele
ctric
Ass
oc.
Inc
© 2
012
GV
EA
. A
ll rig
hts
rese
rved
.
BESS - Actual Performance
Customer Outages avoided as of 6/19/2012
1,621,712
June 201219
Gol
den
Val
ley
Ele
ctric
Ass
oc.
Inc
© 2
012
GV
EA
. A
ll rig
hts
rese
rved
.
BESS Performance – RESPONSE TO EVENTS/OUTAGES
BESS Event Response (November 2003 – April 2005)
Projected Performance
June 201220
Gol
den
Val
ley
Ele
ctric
Ass
oc.
Inc
© 2
012
GV
EA
. A
ll rig
hts
rese
rved
.
BESS Performance – RESPONSE TO EVENTS/OUTAGES
BESS Event Response [MWHrs] (November 2003 – April 2005)
June 201221
Gol
den
Val
ley
Ele
ctric
Ass
oc.
Inc
© 2
012
GV
EA
. A
ll rig
hts
rese
rved
.
BESS Performance – RESPONSE TO EVENTS/OUTAGES
BESS Event Response (January 2009 – December 2011)
Projected Performance
June 201222
Gol
den
Val
ley
Ele
ctric
Ass
oc.
Inc
© 2
012
GV
EA
. A
ll rig
hts
rese
rved
.
BESS – Future Application
Renewable Mode GVEA is working with SAFT and ABB
Optimize for use with the Eva Creek Project
Ramp rate relief
Determine if improved batteries could reduce CT backup req’s
Rapidly responding spinning reserve The BESS response faster than conventional generation.
As Railbelt generation is upgraded to more efficient Aeroderivative units this is expected to become a more important factor in controlling UF loadshed.
June 201223
Gol
den
Val
ley
Ele
ctric
Ass
oc.
Inc
© 2
012
GV
EA
. A
ll rig
hts
rese
rved
.
BESS – World Records
Most Powerful BESS 46 MW for 5 Minutes; Guiness World Record
34 MW for 15 Minutes
27 MW for 24 Minutes
Maximum Output of 46 MVA
Highest Voltage Battery >5 kV DC
Also a -46/+46 MVAR SVC
June 201224
Gol
den
Val
ley
Ele
ctric
Ass
oc.
Inc
© 2
012
GV
EA
. A
ll rig
hts
rese
rved
.
Thank you!