Restoration plan-Serbia 2012 lucru.ppt

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



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




#$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



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'*



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)



Monday 5 October 2015 www.transelectrica.ro

,ontrol Room ,D,




alance o( e.changes across the bor+ers in

!0"" /1h2



-

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



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*



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



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



#s there any particular reason $

%ot only one&'ut une(pected

reasons



)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



+ets fight against the lackout

"4 5nalying

!4 ,ommunication

34 5ction

'4 Principle

74 Pre*ention



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



/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



#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



#n Sustations :

2' Start generators for supplying services

!4 ,ancel automatics

34 Switch o(( the lines

-ction



)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



i*e priority to energie supplyser*ices o( plants which are

(ollow to start

Principle



Start generators in hy+ro plants

pro*i+e+ by in+epen+ent

sources

Principle



• 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



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



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



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



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



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



Balancing market

doesnt work

1 2"232221201<1-171151"13121110<-75"32

=M(>

'ie

Bilateral /ontracts

urchasin 9M *ale 9M hysical notification;oad ?orecast



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




9han8 you (or your attention?

@ABCB B EBFGH ?

,alin hitaShift +eader >ispatcher

Marian Neacsu

%etwork >ispatcher

Restoration plan-Serbia 2012 lucru.ppt

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