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7/17/2019 Restoration plan-Serbia 2012 lucru.ppt
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National Power System
Restoration Strategy
International Dispatcher Meeting
Serbia June 03-06 !0"!
Kladovo
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Monday 5 October 2015 www.transelectrica.ro 2
MissionThe National Power Grid Company Transelectrica is
responsible for electricity transmission, system and market
operation, grid and market infrastructure development,
ensuring the security of the Romanian power system !t also
serves as the main link between electricity supply and
demand, matching all the times power generation with
demand
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Monday 5 October 2015 www.transelectrica.ro 3
#$uipment• %0 electric substations, of which:
" substation of 750 k!used at "00 k#
3&substations of "00 k
'! substations of 220 k
• !"! main trans(ormer units
!' $ "00%220& "00%220%M'
!6 $ "00%110&"00%110%M'
%" $ 220%110 k&220%110%M'
%0 $ 110%M' k
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Monday 5 October 2015 www.transelectrica.ro "
)*erhea+ lines
" 9140 km of overhead lines (OHL), of which#
154,6 km of $%& k' k'(use at )&& k'*
4890 km of )&& k'
4096 km of ++& k'
of & k' (38 km interconnection lines to the
neighboring systems*
" -./ )&& k' !saccea (R-* 0 'arna (1ulgaria* on
2ay +$, +& (after switching voltage level from
$%& k' to )&& k'*
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National Dispatching Centre (DEN)
Regional level
" coordinates the eneration,
technoloical s!stem
services, transmission and
110 k" distri#$tion level
"incl$des the %entral&is'atchin %entre and 5
eional &is'atchin
%enters
" controls 34* 'o+er $nits
H&% &&%& L&%
- 1000 ./
L&&% %L&%
%&% %entral &is'atchin %enter
&% eional &is'atchin %enters
&&% &istri#$tion &is'atchin %enter
L&&% Local &istri#$tion &is'atchin %enters
(medi$m voltae)
H&% H!dro &is'atchin %enters
L&% o+er lant &is'atchin %enters
%L&% %ons$mer Local &is'atchin %enters
Power System Operational Control
Dispatching Centers & Operational Hierarchy
L&%
1000 ./
%&%
&%
2$charest
&%
2ac$
&% %raiova &%
imioara
&% %l$
ranselectrica 7 ational
%ontrol %entre (&):
( )*
+
National level
Power entities &network operatorslevel (regional and
local)
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Monday 5 October 2015 www.transelectrica.ro
,ontrol Room ,D,
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Monday 5 October 2015 www.transelectrica.ro 7
alance o( e.changes across the bor+ers in
!0"" /1h2
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-
3ind farm gross generation capacity#
4&& 23 5une +&+ 6 +&& 23 7ecember +&+ (estimated*
-n 2ay $th, +&# Companies Transelectrica inaugurated the )&& k'
substation ariverde in Constanta County !t was the first important substation of the
transmission grid to discharge the renewable electricity from +ind farms The
Tariverde substation provide connection of over ;00 ./ installed capacity to the
Romanian Power 8ystem
-n 2ay 4rd, +&+ Co Transelectrica 9 Transmission and 8ystem -perator of
Romania commissioned its :&th transmission substation, namely the )&&6& k'
ahman, Tulcea County (connected in former )&& k' -./ !saccea 0 7obrud;a*, with
the main goal to discharge the renewable energy from +ind 'o+er plants
The )&&6& k' substation Rahman will connect ;00 ./ to the <lectricity
Transmission Grid
What is new inWhat is new in Romanian Power System
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3ind power forecasting methods are used, but
predictability of wind plant output remains low
!n this conditions the challenge for Romania in
wind farm integration is not only the assurance of the
access to the grid and the grid development, but also
the development of the whole system in direction of#
fle=ibility of the supply, operation (assurance of
needed reserves*
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The solutions are#
9 %onstr$ction of '$m'ed<storae h!droelectric 'o+er 'lant
arnita < H!dro'o+er lant is a large hydroelectric pumped9storage 'roect in Romnia
(four turbines, each capable of producing +%& megawatts, for a total of &&& 23*
9 =olar 'o+er tends to be complementary to wind
(peak wind speeds appears often during the night*
9distri#$tion of +ind farms in different 'laces (while the local wind speeds vary, as more
turbines are connected over larger and larger areas the average power output becomes less variable*
9 >ntrada! o+er .arket
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Blackout:
Major incident in the power network, with large consumption
out of service, restoration depending y the primary cause with
major economic conse!uences, social and affect security"
sensitive consumers
National Power SystemRestoration Strategy
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#s there any particular reason $
%ot only one&'ut une(pected
reasons
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)arth!uake
Storm*hunderstormShort-circuitsDe(ecti*e e$uipment
umans
1. /andlin errors
2. naccurate or inadeuate counication between
o4erators
3. nsufficient trainin
". recarious ental state5. *ocial e6ents
. nd so on
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+ets fight against the lackout
"4 5nalying
!4 ,ommunication
34 5ction
'4 Principle
74 Pre*ention
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ND, +ispatcher use S,5D5 to
i+enti(y
"4 the sie o( the blac8-out
!4 islan+s operating parameters34 substations un+er *oltage
'4 generators operating on supply
ser*ice
74 triggere+ e$uipment an+
e*entually the possible
consi+eration
64 establish the interconnection
lines that are un+er *oltage
-naly.ing
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/ommunication,)N95,9
Regional Dispatch ,enter +ispatchers
Ser*ice engineer o( the plants that are in
imme+iate comman+
)perational o( the stations that are in
imme+iate comman+
5nnounces neighboring power systems
+ispatchers
IN:)RM that the system is no longer
un+er *oltage
#S95;IS the principle 0asics1 o(action (or operational personnel <(or
+ispatch power plants substations=4
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#n Power Plants :
2' start generators for supplying services
!4 insular groups will be maintaine+ in the
re*olution
34 insular plants regulate (re$uency
-ction
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#n Sustations :
2' Start generators for supplying services
!4 ,ancel automatics
34 Switch o(( the lines
-ction
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)stalished restoration network, depending on situation , using :
2' interconnection lines 0get in touch with neighors1
3' isolated groups on their supply services4' insular plants
Principle
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i*e priority to energie supplyser*ices o( plants which are
(ollow to start
Principle
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Start generators in hy+ro plants
pro*i+e+ by in+epen+ent
sources
Principle
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• 9he lines that
energie+ the plants
will be put in operation
un+er the scheme
establishe+ in the
or+er4• I( in certain cases they
can not comply it will
pre(erably use ""0 8>
an+ !!0 8> lines
Principle
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9he restoration networ8 is carrie+ out an+ lea+s by RD, when
contains installation o( regional area or ND, when
e$uipments are inclu+e+ in the networ8 in se*eral regional
areas4
Principle
National Dispatch Center (NDC)
RDC!charest
RDCac"!
RDCCraiova
HDC DDC P#DC
RDC$imi%oara
RDCCl!
#DDC
C#DC
PLDC
> 1000 MWHDC
ND, 8entral 9is4atch 8enter RD, eional 9is4atch 8enter DD, 9istribution 9is4atch 8enter ;DD, ;ocal 9istribution 9is4atch 8enter D, /ydro 9is4atch 8enter P;D, ower lant ;ocal 9is4atch 8enter ,;D, 8onsuer ;ocal 9is4atch 8enter
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Principle
•5or islands, set the plant which regulates the fre!uency
•*ake care as plant must has fre!uency regulation range
•#slanded plants without possiility of regulating the fre!uency will e
synchroni.ed to an area with a regulated plant
•Restarted plants will e synchroni.ed as soon as possile and loaded,
estalishing regulated plants at first in an area, then on the system in
proportion as interconnect islands
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Principle
•6eep consumption under control•Restore a stale interconnected system and not
supplying consumption•Supply consumption in controlled amount,
achieve a stale operating generator"lines
•/onsumption supplied will e controlled in si.eand structure• +oad plants will e up 378 over the minimum
technical•Provide enough active power on, run with
automatic running control
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Principle
•6eep checking the active power on the lines and generators
•Predominantly resistive consumption
•9uantified consumption disconnected
•Respect the load and parameters
• -void dangerous shocks
• -void generators that work into capacitive
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Principle
•+oad the lines to avoid overloads :
227 k line, P ; <7 MW, 9 ; 37 M-r, 337 k lines of P ; 2<7MW, 9 ; <7
M-r, =77 k lines P ; <77 MW, 9 ; 277 M-R
• =77k lines will energi.e generatotrs of 477 MW or larger areas of the
system *hey
•avoid maneuver that can lead to impossile voltage controlled group
•switch tap on transformers
•reactors will e in operation as the last solution
• -void maneuver without controlling electricity parameters
• - triggered e!uipment will not e put in operation till see the triggered
cause
• -void isolators maneuvers
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Balancing market
doesnt work
1 2"232221201<1-171151"13121110<-75"32
=M(>
'ie
Bilateral /ontracts
urchasin 9M *ale 9M hysical notification;oad ?orecast
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Prevention
oSource of reactive power evenly distriuted
o - lower angle etween voltage of generators
o -void e(cessive urdens of long lines
o/ontinues current lines
o#ntelligent islands
o -utomation ased on a fre!uency or voltage level
o
-utomation against asynchronous operating o#ncrease seeing tie lines and more than