POWER UPGRADING OF TRANSMISSION LINE BY COMBINING AC-DC TRANSMISSION
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tauseef52
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#1
26-01-2010, 11:08 AM


hello,
i want full report on "POWER UPGRADING OF TRANSMISSION LINE BY COMBINING AC-DC TRANSMISSION".so pls anyone post the full report
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computer science technology
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#2
26-01-2010, 11:12 PM

Long extra high voltage (EHV) ac lines cannot be loaded to their thermal limits in order to keep sufficient margin against transient instability.by using this system it is possible to load these lines very close to their thermal limits. The conductors are allowed to carry usual ac along with dc superimposed on it. The added dc power flow does not cause any transient instability. Substantial gain in the loadability of the line is obtained. Master current controller senses ac current and regulates the dc current orders for converters online such that conductor current never exceeds its thermal limit and by using Fast controllability and modulation of DC component Loss of synchronism is prevented by quickly and producing sufficient decelerating energy to counteract accelerating energy gained during fault and subsequently due to loss of line after clearing the fault.

read full paper
scribddoc/22894025/1-Power-Upgrading-of-Transmission-Line-by-Combining-ACDC-Transmission
Use Search at http://topicideas.net/search.php wisely To Get Information About Project Topic and Seminar ideas with report/source code along pdf and ppt presenaion
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ravikirandeshamoni
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#3
27-01-2010, 02:26 PM

hi i too want it pls forward me too
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computer science technology
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#4
28-01-2010, 08:04 AM

read scribddoc/22894025/1-Power-Upgrading-of-Transmission-Line-by-Combining-ACDC-Transmission
Use Search at http://topicideas.net/search.php wisely To Get Information About Project Topic and Seminar ideas with report/source code along pdf and ppt presenaion
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renukobal
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#5
31-01-2010, 12:39 PM

i too want plz forward it to me
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projects wizhard
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#6
04-07-2010, 05:09 PM

Hey,
you can download the full report from the link:
scribddoc/22894025/1-Power-Upgrading-of-Transmission-Line-by-Combining-ACDC-Transmission

you may have to register in that site too for the download.
Use Search at http://topicideas.net/search.php wisely To Get Information About Project Topic and Seminar ideas with report/source code along pdf and ppt presenaion
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project report helper
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#7
27-09-2010, 04:49 PM


.pdf   1 Power Upgrading of Transmission Line by Combining ACDC Transmission.pdf (Size: 1.65 MB / Downloads: 272)
Power Upgrading of Transmission Line
by Combining AC–DC Transmission




H. Rahman and B. H. Khan, Senior Member, IEEE



abstract



Abstract—
Long extra high voltage (EHV) ac lines cannot be loaded to their thermal limits in order to keep sufficient margin against transient instability. With the scheme proposed in this paper, it is possible to load these lines very close to their thermal limits. The conductors are allowed to carry usual ac along with dc superimposed on it. The added dc power flow does not cause any transient instability. This paper presents the feasibility of converting a double circuit ac line into composite ac–dc power transmission line to get the advantages of parallel ac–dc transmission to improve stability and damping out oscillations. Simulation and experimental studies are carried out for the coordinated control as well as independent control of ac and dc power transmissions. No alterations of conductors, insulator strings, and towers of the original line are needed. Substantial gain in the load ability of the line is obtained. Master current controller senses ac current and regulates the dc current orders for converters online such that conductor current never exceeds its thermal limit. Index Terms—Extra high voltage (EHV) transmission, flexible ac transmission system (FACTS), power system computer-aided design (PSCAD) simulation, simultaneous ac–dc power transmission.
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project report helper
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#8
07-10-2010, 11:58 AM


.docx   Ieee project.docx (Size: 67.19 KB / Downloads: 208)

AC and DC Power Transmission,1991. International Conference on



Digital simulation of HVDC transmission and its correlation to simulator studies

Abstract



In order to investigate the behaviour of HVDC transmission in a power system, suitable simulation models are required. A detailed commutation model with simulation of the thyristor bridges, while very precise, requires considerable time for calculation. Simplified models, on the other hand, do not always provide sufficiently accurate results. Simplified and detailed HVDC simulation models are described and compared. In order to provide a yardstick for comparison, the HVDC Benchmark model study of the FGH analog simulator at Mannheim-Rheinau was used as a reference. The NETOMAC digital simulation program which was employed for all calculations, is a powerful and flexible tool by means of which practically all problems of electrical energy transmission including control algorithms can be investigated. The variable time step of NETOMAC is of particular relevance for investigation of HVDC transmission and static VAr compensators thus ensuring that the continuity conditions are always satisfied while a thyristor is fired
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neel_403
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#9
07-10-2010, 12:28 PM

Dear Sir/Madam,

I am very much interested in above mentioned topic. could you please send the seminar and presentation report.

Regards,
Neelakanth
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#10
11-02-2012, 12:23 PM

to get information about the topic POWER UPGRADING OF TRANSMISSION LINE BY COMBINING AC DC TRANSMISSION full report ,ppt and related topic refer the link bellow

topicideashow-to-power-upgrading-of-transmission-line-by-combining-ac-dc-transmission

topicideashow-to-power-upgrading-of-transmission-line-by-combining-ac

topicideashow-to-power-upgrading-of-transmission-line-by-combining-ac?mode=linear
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seminar flower
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#11
18-06-2012, 03:11 PM

Power upgrading of Transmission Line by combining
AC-DC Transmission



.pdf   Power upgrading of Transmission.pdf (Size: 613.49 KB / Downloads: 84)
Abstract:

Long extra high voltage (EHV) ac lines cannot be loaded to their thermal limits in order to keep
sufficient margin against transient instability. With the scheme proposed in this project and implimentation, it is possible to load these
lines very close to their thermal limits. The conductors are allowed to carry usual ac along with dc superimposed
on it.
The added dc power flow does not cause any transient instability. This paper gives the feasibility of converting a
double circuit ac line into composite ac–dc power transmission line to get the advantages of parallel ac–dc
transmission to improve stability and damping out oscillations.

Introduction:

In recent years,
environmental, right-of-way, and cost concerns have
delayed the construction of a new transmission line,
while demand of electric power has shown steady
but geographically uneven growth. The power is
often available at locations not close to the growing
load centers but at remote locations. These locations
are largely determined by regulatory policies,
environmental acceptability, and the cost of
available energy. The wheeling of this available
energy through existing long ac lines to load centers
has a certain upper limit due to stability
considerations. Thus, these lines are not loaded to
their thermal limit to keep sufficient margin against
transient instability.

Problem Definition:-

The main object of my paper is to show that by
superimposing DC in AC transmission, the capacity
of the transmission line can be increased by nearly
70 % of that if only AC is transmitted. In our
existing transmission system, long extra high
voltage (EHV) ac lines cannot be loaded to their
thermal limits in order to keep sufficient margin
against transient instability. With the scheme
proposed in this project and implimentation, it is possible to load these
lines very close to their thermal limits. The
conductors are allowed to carry usual ac along with
dc superimposed on it.

High Voltage AC Transmission

Introduction:-
Industrial-minded countries of the world require a
vast amount of energy of which electrical energy
forms a major fraction. The world has already
consumed major portion of its natural resources and
is looking for sources of energy other than Hydro
and Thermal to cater for the rapid rate of
consumption which is outpacing the discovery of
new resources. This will not slow down with time
and therefore there exists a need to reduce the rate of
annual increase in energy consumption by any
intelligent society if resources have to be preserved
for posterity. This requires very high voltages for
transmission. The very rapid stride taken by
development of dc transmission since 1950 is
playing a major role in extra-long-distance
transmission, complementing or supplementing
E.H.V. ac transmission. They have their roles to
play and a country must make intelligent assessment
of both in order to decide which is best suited for the
country's economy.

Conclusion

The feasibility to convert ac transmission line to a
composite ac–dc line has been demonstrated. For the
particular system studied, there is substantial
increase (about 83.45%) in the loadability of the
line. The line is loaded to its thermal limit with the
superimposed dc current.
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#12
23-01-2013, 10:01 AM

to get information about the topic "power upgrading of transmission line by combining ac dc transmission" full report ppt and related topic refer the link bellow

seminar and presentationproject and implimentationsattachment.php?aid=24735

topicideashow-to-power-upgrading-of-transmission-line-by-combining-ac-dc-transmission

topicideashow-to-power-upgrading-of-transmission-line-by-combining-ac-dc-transmission?pid=26187&mode=threaded

topicideashow-to-power-upgrading-of-transmission-line-by-combining-ac-dc-transmission?page=4
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