POWER June 2011 - 42

INSTRUMENTATION & CONTROL
WANT POWER
INDUSTRY
NEWS MORE
OFTEN?
delivers headline
news for power
generators weekly
Subscribe now to
get your free
subscription
to the electronic
newsletter from
POWER magazine.
Just visit our
web site-
www.powermag.com
-to subscribe.
Start your free
subscription
today!
42
3. Power block 1 MVC performance test results. Source: GE Power
AGC power setpoint
Actual power
570
550
530
510
490
470
450
MVC off
Average setpoint
Actual average power
MVC on
1 5 9 13 17 21 25 29 33 37 41 45 49 53 57 61 65 69 73 77 81
Data points
4. Power block 2 MVC performance test results. Source: GE Power
AGC power setpoint
570
550
530
510
490
470
450
MVC off
Actual power
Average setpoint
Actual average power
MVC on
1 4 7 10 13 16 19 22 25 28 31 34 37 40 43 46 49 52 55 58 61
Data points
able benefits for K-Power, such as improved
closed-loop AGC control, stable plant operation,
and increased operator understanding
of process interactions.
A study was conducted in February 2010
to assess the long-term benefits of the MVC.
In sum, the APC has provided increased stability
in plant operations, and the variation
of important plant operating variables has
been reduced by a minimum of 30%. These
results are seen in the test data, showing the
standard deviation calculated between the
MVC On and Off conditions, for each power
block (Table 2).
The MVC has also reduced the variations in
overall power generation. With MVC control,
overall power generation is controlled closer
to plant targets than without MVC control. A
minimum 27% improvement was observed.
Figures 3 and 4 illustrate the improvement in
AGC control between MVC Off and On for
each power block. The test data clearly shows
www.powermag.com
64 67 70 73 76 79 82
that when MVC is On, the average actual MW
is closer to the average AGC MW.
A less-quantifiable, but nevertheless important,
benefit of the APC is improved operator
perception of process interactions and
understanding of optimum operating conditions.
Process interactions are more clearly
visible to operators as the controller simultaneously
manipulates variables to maintain a
controlled variable at its target value. A plant
staff that understands how the MVC works
is much more valuable than one that knows
only which to buttons to push. ■
-Sang-joon Park is the GE Energy O&M
operation manager for K-Power. Gaurav
Gupta (gupta.gaurav@ge.com) is service
manager, LeeMary Ma (leemary.ma@
ge.com) is lead technical specialist, and
Uttam Narasimhan (uttam.narasimhan@
ge.com) is lead application engineer for the
Performance & Optimization group in GE
Measurement & Control Solutions.
POWER | June 2011
MW
MW

http://www.powermag.com http://www.powermag.com

POWER June 2011

Table of Contents for the Digital Edition of POWER June 2011

Contents
POWER June 2011 - Cover1
POWER June 2011 - Cover2
POWER June 2011 - Contents
POWER June 2011 - 2
POWER June 2011 - 3
POWER June 2011 - 4
POWER June 2011 - 5
POWER June 2011 - 6
POWER June 2011 - 7
POWER June 2011 - 8
POWER June 2011 - 9
POWER June 2011 - 10
POWER June 2011 - 11
POWER June 2011 - 12
POWER June 2011 - 13
POWER June 2011 - 14
POWER June 2011 - 15
POWER June 2011 - 16
POWER June 2011 - 17
POWER June 2011 - 18
POWER June 2011 - 19
POWER June 2011 - 20
POWER June 2011 - 21
POWER June 2011 - 22
POWER June 2011 - 23
POWER June 2011 - 24
POWER June 2011 - 25
POWER June 2011 - 26
POWER June 2011 - 27
POWER June 2011 - 28
POWER June 2011 - 29
POWER June 2011 - 30
POWER June 2011 - 31
POWER June 2011 - 32
POWER June 2011 - 33
POWER June 2011 - 34
POWER June 2011 - 35
POWER June 2011 - 36
POWER June 2011 - 37
POWER June 2011 - 38
POWER June 2011 - 39
POWER June 2011 - 40
POWER June 2011 - 41
POWER June 2011 - 42
POWER June 2011 - 43
POWER June 2011 - 44
POWER June 2011 - 45
POWER June 2011 - 46
POWER June 2011 - 47
POWER June 2011 - 48
POWER June 2011 - 49
POWER June 2011 - 50
POWER June 2011 - 51
POWER June 2011 - 52
POWER June 2011 - 53
POWER June 2011 - 54
POWER June 2011 - 55
POWER June 2011 - 56
POWER June 2011 - 57
POWER June 2011 - 58
POWER June 2011 - 59
POWER June 2011 - 60
POWER June 2011 - 61
POWER June 2011 - 62
POWER June 2011 - 63
POWER June 2011 - 64
POWER June 2011 - 65
POWER June 2011 - 66
POWER June 2011 - 67
POWER June 2011 - 68
POWER June 2011 - 69
POWER June 2011 - 70
POWER June 2011 - 71
POWER June 2011 - 72
POWER June 2011 - Cover3
POWER June 2011 - Cover4
https://www.nxtbook.com/accessintelligence/POWER/pwr_august-2024
https://www.nxtbook.com/accessintelligence/POWER/pwr_june-2024
https://www.nxtbook.com/accessintelligence/POWER/pwr_july-2024
https://www.nxtbook.com/accessintelligence/POWER/pwr_may-2024
https://www.nxtbook.com/accessintelligence/POWER/pwr_april-2024
https://www.nxtbook.com/accessintelligence/POWER/pwr_march-2024
https://www.nxtbook.com/accessintelligence/POWER/pwr_february-2024
https://www.nxtbook.com/accessintelligence/POWER/pwr_january-2024
https://www.nxtbook.com/accessintelligence/POWER/pwr_december-2023
https://www.nxtbook.com/accessintelligence/POWER/pwr_november-2023
https://www.nxtbook.com/accessintelligence/POWER/power-october-2023
https://www.nxtbook.com/accessintelligence/POWER/re-tech-supp-to-power-september-2023
https://www.nxtbook.com/accessintelligence/POWER/power-september-2023
https://www.nxtbook.com/accessintelligence/POWER/power-and-re-tech-supp-september-2023
https://www.nxtbook.com/accessintelligence/POWER/power-august-2023
https://www.nxtbook.com/accessintelligence/POWER/power-july-2023
https://www.nxtbook.com/accessintelligence/POWER/power-june-2023
https://www.nxtbook.com/accessintelligence/POWER/power-may-2023
https://www.nxtbook.com/accessintelligence/POWER/power-april-2023
https://www.nxtbook.com/accessintelligence/POWER/power-march-2023
https://www.nxtbook.com/accessintelligence/POWER/power-february-2023
https://www.nxtbook.com/accessintelligence/POWER/power-january-2023
https://www.nxtbook.com/accessintelligence/POWER/power-december-2022
https://www.nxtbook.com/accessintelligence/POWER/power-november-2022
https://www.nxtbook.com/accessintelligence/POWER/Power-October-2022-140th-Anniversary-Supp
https://www.nxtbook.com/accessintelligence/POWER/Power-October-2022-and-Anniversary-Supp
https://www.nxtbook.com/accessintelligence/POWER/power-and-re-tech-supp-september-2022
https://www.nxtbook.com/accessintelligence/POWER/power-september-2022
https://www.nxtbook.com/accessintelligence/POWER/power-august-2022
https://www.nxtbook.com/accessintelligence/POWER/Power-July-2022-Intl
https://www.nxtbook.com/accessintelligence/POWER/power-july-2022
https://www.nxtbook.com/accessintelligence/POWER/power-june-2022-intl
https://www.nxtbook.com/accessintelligence/POWER/power-june-2022
https://www.nxtbook.com/accessintelligence/POWER/power-may-2022
https://www.nxtbook.com/accessintelligence/POWER/power-may-2022-intl
https://www.nxtbook.com/accessintelligence/POWER/power-april-2022
https://www.nxtbook.com/accessintelligence/POWER/Power-April-2022-Intl
https://www.nxtbook.com/accessintelligence/POWER/power-march-2022
https://www.nxtbook.com/accessintelligence/POWER/power-february-2022
https://www.nxtbook.com/accessintelligence/POWER/power-january-2022
https://www.nxtbook.com/accessintelligence/POWER/power-december-2021
https://www.nxtbook.com/accessintelligence/POWER/power-top-plants-supp-december-2021
https://www.nxtbook.com/accessintelligence/POWER/power-november-2021
https://www.nxtbook.com/accessintelligence/POWER/power-october-2021
https://www.nxtbook.com/accessintelligence/POWER/power-september-2021
https://www.nxtbook.com/accessintelligence/POWER/power-august-2021
https://www.nxtbook.com/accessintelligence/POWER/power-july-2021
https://www.nxtbook.com/accessintelligence/POWER/power-june-2021
https://www.nxtbook.com/accessintelligence/POWER/power-may-2021
https://www.nxtbook.com/accessintelligence/POWER/power-april-2021
https://www.nxtbook.com/accessintelligence/POWER/power-march-2021
https://www.nxtbook.com/accessintelligence/POWER/power-february-2021
https://www.nxtbook.com/accessintelligence/POWER/power-january-2021
https://www.nxtbook.com/accessintelligence/POWER/power-december-2020
https://www.nxtbook.com/accessintelligence/POWER/power-november-2020
https://www.nxtbook.com/accessintelligence/POWER/power-october-2020
https://www.nxtbook.com/accessintelligence/POWER/power-september-2020
https://www.nxtbook.com/accessintelligence/POWER/power-august-2020
https://www.nxtbook.com/accessintelligence/POWER/power-july-2020
https://www.nxtbook.com/accessintelligence/POWER/power-june-2020
https://www.nxtbook.com/accessintelligence/POWER/power-may-2020
https://www.nxtbook.com/accessintelligence/POWER/power-april-2020
https://www.nxtbook.com/accessintelligence/POWER/power-march-2020
https://www.nxtbook.com/accessintelligence/POWER/power-february-2020
https://www.nxtbook.com/accessintelligence/POWER/power-january-2020
https://www.nxtbook.com/accessintelligence/POWER/power-december-2019
https://www.nxtbook.com/accessintelligence/POWER/power-november-2019
https://www.nxtbook.com/accessintelligence/POWER/power-october-2019
https://www.nxtbook.com/accessintelligence/POWER/power-september-2019
https://www.nxtbook.com/accessintelligence/POWER/power-august-2019
https://www.nxtbook.com/accessintelligence/POWER/power-july-2019
https://www.nxtbook.com/accessintelligence/POWER/power-june-2019
https://www.nxtbook.com/accessintelligence/POWER/power-may-2019
https://www.nxtbook.com/accessintelligence/POWER/power-april-2019
https://www.nxtbook.com/accessintelligence/POWER/power-march-2019
https://www.nxtbook.com/accessintelligence/POWER/power-february-2019
https://www.nxtbook.com/accessintelligence/POWER/power-january-2019
https://www.nxtbook.com/accessintelligence/POWER/power-december-2018
https://www.nxtbook.com/accessintelligence/POWER/power-november-2018
https://www.nxtbook.com/accessintelligence/POWER/power-october-2018
https://www.nxtbook.com/accessintelligence/POWER/power-september-2018
https://www.nxtbook.com/accessintelligence/POWER/power-august-2018
https://www.nxtbook.com/accessintelligence/POWER/power-july-2018
https://www.nxtbook.com/accessintelligence/POWER/power-june-2018
https://www.nxtbook.com/accessintelligence/POWER/power-may-2018
https://www.nxtbook.com/accessintelligence/POWER/power-april-2018
https://www.nxtbook.com/accessintelligence/POWER/power-march-2018
https://www.nxtbook.com/accessintelligence/POWER/power-february-2018
https://www.nxtbook.com/accessintelligence/POWER/power-january-2018
https://www.nxtbook.com/accessintelligence/POWER/power-december-2017
https://www.nxtbook.com/accessintelligence/POWER/power-november-2017
https://www.nxtbook.com/accessintelligence/POWER/power-october-2017
https://www.nxtbook.com/accessintelligence/POWER/power-september-2017
https://www.nxtbook.com/accessintelligence/POWER/power-august-2017
https://www.nxtbook.com/accessintelligence/POWER/power-july-2017
https://www.nxtbook.com/accessintelligence/POWER/power-june-2017
https://www.nxtbook.com/accessintelligence/POWER/power-may-2017
https://www.nxtbook.com/accessintelligence/POWER/power-april-2017
https://www.nxtbook.com/accessintelligence/POWER/power-march-2017
https://www.nxtbook.com/accessintelligence/POWER/power-february-2017
https://www.nxtbook.com/accessintelligence/POWER/power-january-2017
https://www.nxtbook.com/accessintelligence/POWER/power-december-2016
https://www.nxtbook.com/accessintelligence/POWER/power-november-2016
https://www.nxtbook.com/accessintelligence/POWER/power-october-2016
https://www.nxtbook.com/accessintelligence/POWER/power-september-2016
https://www.nxtbook.com/accessintelligence/POWER/power-august-2016
https://www.nxtbook.com/accessintelligence/POWER/power-july-2016
https://www.nxtbook.com/accessintelligence/POWER/power-june-2016
https://www.nxtbook.com/accessintelligence/POWER/power-may-2016
https://www.nxtbook.com/accessintelligence/POWER/power-april-2016
https://www.nxtbook.com/accessintelligence/POWER/power-march-2016
https://www.nxtbook.com/accessintelligence/POWER/power-february-2016
https://www.nxtbook.com/accessintelligence/POWER/power-january-2016
https://www.nxtbook.com/accessintelligence/POWER/power-december-2015
https://www.nxtbook.com/accessintelligence/POWER/power-november-2015
https://www.nxtbook.com/accessintelligence/POWER/power-october-2015
https://www.nxtbook.com/accessintelligence/POWER/power-september-2015
https://www.nxtbook.com/accessintelligence/POWER/power-august-2015
https://www.nxtbook.com/accessintelligence/POWER/power-july-2015
https://www.nxtbook.com/accessintelligence/POWER/power-june-2015
https://www.nxtbook.com/accessintelligence/POWER/power-may-2015
https://www.nxtbook.com/accessintelligence/POWER/power-april-2015
https://www.nxtbook.com/accessintelligence/POWER/power-march-2015
https://www.nxtbook.com/accessintelligence/POWER/power-february-2015
https://www.nxtbook.com/accessintelligence/POWER/power-january-2015
https://www.nxtbook.com/accessintelligence/POWER/power-december-2014
https://www.nxtbook.com/accessintelligence/POWER/power-november-2014
https://www.nxtbook.com/accessintelligence/POWER/power-october-2014
https://www.nxtbook.com/accessintelligence/POWER/power-september-2014
https://www.nxtbook.com/accessintelligence/POWER/power-august-2014
https://www.nxtbook.com/accessintelligence/POWER/power-july-2014
https://www.nxtbook.com/accessintelligence/POWER/power-june-2014
https://www.nxtbook.com/accessintelligence/POWER/power-may-2014
https://www.nxtbook.com/accessintelligence/POWER/power-april-2014
https://www.nxtbook.com/accessintelligence/POWER/power-march-2014
https://www.nxtbook.com/accessintelligence/POWER/power-february-2014
https://www.nxtbook.com/accessintelligence/POWER/power-january-2014
https://www.nxtbook.com/accessintelligence/POWER/power-december-2013
https://www.nxtbook.com/accessintelligence/POWER/power-november-2013
https://www.nxtbook.com/accessintelligence/POWER/power-october-2013
https://www.nxtbook.com/accessintelligence/POWER/power-september-2013
https://www.nxtbook.com/accessintelligence/POWER/power-august-2013
https://www.nxtbook.com/accessintelligence/POWER/power-july-2013
https://www.nxtbook.com/accessintelligence/POWER/power-june-2013
https://www.nxtbook.com/accessintelligence/POWER/power-may-2013
https://www.nxtbook.com/accessintelligence/POWER/power-april-2013
https://www.nxtbook.com/accessintelligence/POWER/power-march-2013
https://www.nxtbook.com/accessintelligence/POWER/power-february-2013
https://www.nxtbook.com/accessintelligence/POWER/power-january-2013
https://www.nxtbook.com/accessintelligence/POWER/power-december-2012
https://www.nxtbook.com/accessintelligence/POWER/power-november-2012
https://www.nxtbook.com/accessintelligence/POWER/power-october-2012
https://www.nxtbook.com/accessintelligence/POWER/power-september-2012
https://www.nxtbook.com/accessintelligence/POWER/power-august-2012
https://www.nxtbook.com/accessintelligence/POWER/power-july-2012
https://www.nxtbook.com/accessintelligence/POWER/power-june-2012
https://www.nxtbook.com/accessintelligence/POWER/power-may-2012
https://www.nxtbook.com/accessintelligence/POWER/power-april-2012
https://www.nxtbook.com/accessintelligence/POWER/power-march-2012
https://www.nxtbook.com/accessintelligence/POWER/power-february-2012
https://www.nxtbook.com/accessintelligence/POWER/power-january-2012
https://www.nxtbook.com/accessintelligence/POWER/power-november-2011
https://www.nxtbook.com/accessintelligence/POWER/power-october-2011
https://www.nxtbook.com/accessintelligence/POWER/power-september-2011
https://www.nxtbook.com/accessintelligence/POWER/power-august-2011
https://www.nxtbook.com/accessintelligence/POWER/power-july-2011
https://www.nxtbook.com/accessintelligence/POWER/power-june-2011
https://www.nxtbook.com/accessintelligence/POWER/power-may-2011
https://www.nxtbook.com/accessintelligence/POWER/power-april-2011
https://www.nxtbook.com/accessintelligence/POWER/power-march-2011
https://www.nxtbook.com/accessintelligence/POWER/power-february-2011
https://www.nxtbook.com/accessintelligence/POWER/power-january-2011
https://www.nxtbook.com/accessintelligence/POWER/power-december-2010
https://www.nxtbook.com/accessintelligence/POWER/power-november-2010
https://www.nxtbook.com/accessintelligence/POWER/power-october-2010
https://www.nxtbook.com/accessintelligence/POWER/power-september-2010
https://www.nxtbook.com/accessintelligence/POWER/power-august-2010
https://www.nxtbook.com/accessintelligence/POWER/power-july-2010
https://www.nxtbook.com/accessintelligence/POWER/power-june-2010
https://www.nxtbook.com/accessintelligence/POWER/power-may-2010
https://www.nxtbookmedia.com