albania transmission network development plan …...150 kv 110 kv 237 mw 35, 20, 10, 6 kv 1538.74 mw...

_____________________________________________________________________________________

Transmission System Planning & Development

1

ALBANIA TRANSMISSION NETWORK DEVELOPMENT PLAN

1. Albanian Power System Overview

The Power System of Albania has 445.7 km of 400 kV lines, 1250 km of 220 kV lines, 34.4 km

of 150 kV line and 1606.7 km of 110 kV lines. The main power plants of “Drin River” Cascade in

the Northern part of Albania are connected in the 220 kV transmission network which is also the

main connection to the biggest load in the area of Tirana, Elbasan, Durres and Fieri. The 110 kV

network, majorly part is closed in rings and in some part radial. It covers all urban areas of the

country in order to supply the Distribution System that nowadays is operated by OSHEE and is

100% state owned.

Transmission grid development in compliance with the long term forecasts and electricity sector

development plans, in general, represents one of OST fundamental functions comprising a

necessity for the performance of its functions. The electricity demand in Albania still remains at

very high rates. Referring to the data for the last ten years, the power supply by transmission

system to distribution Substations and eligible customers of the country connected to the

transmission network has been growing about 2.5% annually rate.

The application for connection of new generating sources to the transmission system have

increased and according to forecasts, important power plants, mainly HPP and Renewables, are

expected to be built in the coming years. Taking account the last 15-years, it is evident that

domestic production does not fully cover the demand for electricity and the country needs to import

large amounts of electricity in the dry years. In order to realize the exchanges for a safe operation

of transmission system, and create favorable technical conditions to develop an integrated market

of electricity in the region there need to be increased the exchange capacity with the neighbor

systems and strengthening of the interconnection network.

Transmission System Operator (OST) operates the transmission system in Albania and provides

capacities necessary for:

Supply of distribution system substations (OSHEE) and eligible consumers directly

connected to transmission grid;

Transmission of electricity generated by Power Plants;

Transitions and exchanges of electricity with neighboring countries.

_____________________________________________________________________________________


2

OST owns and operates in total fifteen Substations (400 kV, 220 kV, and 150 kV) with a total

installed capacity of 4096 MVA. Albania has six Interconnection lines with the neighboring

countries:

• 400 kV line Zemblak - Kardia (Greece)

• 400 kV line Tirana 2 - Podgorica (Montenegro)

• 400 kV line Tirana2 - Kosovo B (Kosovo)

• 220 kV line Koplik - Podgorica (Montenegro)

• 220 kV line Fierze - Prishtina (Kosovo)

• 150 kV Bistrica 1 - Igumenice (Greece).

The 400 kV Tirana2 (AL) – Kosovo-B (KO) is constructed, the project is fully commissioned and

ready to be in operation.

The figure below shows in a schematically way the structure of the transmission network in

Albania.

ALBANIAN TRANSMISSION SYSTEM STRUCTURE

1200 MVA

126 MVA

2390 MVA

300 MVA

80 MVA

INTERCONNECTORS

400 kV

220 kV

150 kV 110 kV

237 MW

35, 20, 10, 6 kV1538.74 MW

411.44 MW

120 MVAr

_____________________________________________________________________________________


3

More than 70% of the total generated installed capacity is connected in the 220 kV network.

Autotransformers 220/400 kV have a capacity of 1200 MVA and the 110 kV grid is connected

with the 400 kV Rings by two 150 MVA Autotransformers installed in the south-eastern part of

the network in Zemblak Substation.

Transmission of electricity from the main sources of generation to the major centers of

consumption is done through the 220 kV grid and further through the 220/110 kV transformation

(2390 MVA). The 110 kV network that supply all the 110 kV substations previously represented

the main load nodes while actually are connected around 20% of the installed generation capacity.

In the following picture it is shown the Albanian Transmission map updated recently in the

ENTSO-E framework.

_____________________________________________________________________________________


4

Albanian Power System, ENTSO-E map.

_____________________________________________________________________________________


5

2. Current situation of the network, electricity demand and generation forecast.

2.1 Electricity consumption for the period 2005-2017.

Economic and demographic factors in the last decade have significantly affected the fluctuations

of the energy consumption in different regions of the country. In this period fluctuations in

electricity consumption has been mostly in urban areas, such as Elbasan, Fier, Burrel, Shkodra,

Korca and in some remote areas. In some regions there have been considerable increases in demand

for transmission capacity from industrial consumer or small hydro generation. These fluctuations

become stable after 2009.

Below is given: (i) the historic development of the annual consumption of electricity transmitted

by the transmission network during the period 2005-2017; (ii) Hourly Load and the (iii) Load

Duration Curve for year 2017.

0

2,000

4,000

6,000

8,000

2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

5,6

42

5,7

38

5,3

19

6,1

51

6,4

63

6,7

47

7,1

45

7,3

44

7,6

12

7,4

13

6,8

76

6,5

96

7,0

91

Electricity in the Transmission Network 2005-2017 (GWh)

0

200

400

600

800

1000

1200

1400

1600

1 1001 2001 3001 4001 5001 6001 7001 8001

MW

Hours

Hourly Load - 2017

_____________________________________________________________________________________


6

2.3 Losses in the Transmission Grid

As a result of Continuously Strengthen of the Transmission System, electricity losses in the

transmission network have been reduced over the years. The following graph shows the electricity

losses during the period 2005-2017.

Implementation of very important projects has led to the strengthen of the Transmission System

and the future development of the grid will have a significant impact in reducing electricity losses.

The goal for the year 2025 is to reduce the level of losses under 2%, but for sure this is related also

by the operation conditions of the largest hydropower plants of Drini River Cascade.

0

200

400

600

800

1000

1200

1400

1600

1 1001 2001 3001 4001 5001 6001 7001 8001

MW

Hour

Load Duration Curve - Year 2017

4.56%

3.73% 3.77%

3.08% 3.02% 3.03%

2.33% 2.21% 2.32%2.09% 2.03%

2.25% 2.08%

2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Losses in % (2005 - 2017)

_____________________________________________________________________________________


7

3. Transmission System Development Plan

During the recent years are realized and are in operation important projects that have increased

significantly: (I) The reliability of the Power System, (II) Exchange capacities with neighboring

countries and (III) Quality of service for the transmission system clients.

Other important benefits of the new projects are the reduction of non-served electricity and the

reduction of transmission losses. From 2005 to 2017 the electricity demand is increased 19%,

while electricity losses are reduced from 4.56% to 2.08%.

3.1 Forecasting electricity consumption up to 2025

Based on real consumption of electricity for the period 2005-2017 as well as the methodology

followed so far, it is needed to make an accurate and a wide range of the forecast of electricity

demand. To achieve this are carried out calculations for the three main scenarios.

The first scenario (Realistic) based on the load trend of the transmission grid over the years by

region, the second scenario (Pessimistic) is based on the calculation for a growth rate of lower

demand, and the third scenario (Optimistic), which takes into account a large increase in demand

for electricity, directly impacted by the economic development of the country. The three scenarios

are presented in the diagram below.

In the above picture it is evident that the growth of electricity demand will about 2-2.2%/y.

5,000

6,000

7,000

8,000

9,000

10,000

11,000

12,000

Optimistic Op. Realistic Op. Pessimistic Op.

Long Term Forecast of Electricity Demand 2017-2027

_____________________________________________________________________________________


8

3.2. New Generation Capacity Forecast for years 2015 - 2025

Nowadays OST is facing a large number of requests for connection of new power plants in the

transmission system and according to the forecast, in the next few years are expected to be built

several important sources of electricity, mainly hydro-power plants, and also a lot of renewables,

especially photovoltaic.

Regarding the expansion of the new generation capacity in the future are taken into account some

New large HPP as Devolli River Cascade, Fan River Cascade and some small power plants which

are under construction, but is still undefined the time of the commissioning some other big power

plants. Based on the information obtained from National Agency of Natural Resources and other

corresponding institutions, the private investments in the generation capacity that are more reliable

by 2025 are shown in the following table.

_____________________________________________________________________________________


9

_____________________________________________________________________________________


10

3.3 Albanian 400/220/110 kV Single Line Diagram for Year 2025

ALBANIAN SINGLE LINE DIAGRAM - YEAR 2020-2025

HPP V.DEJA HPP KOMANI HPP FIERZA

5 x 50 MW 4 x 125 MW4 x 150 MWKOPLIK

220kV

220kV

220kV220kV220kV

220kV

TIRANA-1

BURRELI

PRIZREN

Suc

Bulqize

Shupenze

VojnikPeshkopi

2x6

0M

VA

Renc V.Deja

2x120MVA

HPP Ulez

4x6.4MW Kurbnesh

2x12MW

SHKP1

SHKP2Skuraj

Rubik

Reps F.ArrezKalimash

Kukes

Tunel

Shkod.1

Shkod.2

Kosmac

Lezhe

Lac-2

F.Kuqe

Lac-1

Kruje

F.Kruje

Mamuras

Kashar

QenderTraktora

Selite

RRASHBULLGolem

Sukth

P.Romano

Shkozet

Kavaje

Lushnje

2x150MVA

2x1

20M

VA

220kV

110kV

ELBASAN1ELBASAN2

2x3

00M

VA

400kV

220kV

Fiber

Kusarth

NI-CO

Met.2

Cerrik

Ibe3x1

20

MV

A

220kV

Librazhd

Prenjas

G.Kuq

Pogradec

Korce

Erseke

KARDIA

3x7.5MW Igumenice

Bistrice

Gjirokaster Gjirok.Re Tepelene

Memaliaj

KelcyreSarande

Belsh

Berat

Uznove

Krahes

Vlora2

Kafaraj

Vlora1

Selenice

3x1

20M

VA

FIER 220kV

110kV

Drenove

Ballsh

BABICE

2x100MVA

110kV

TPP VLORE

97MW

220kV

ZEMBLAK

2x150MVA

400kV

12

0M

VA

Fierze

B.Curri110kV

80

MV

A

90MVA

110kV

Kajan

Marinez

2X300MVA

2X120MVA

220kV

400kV

110kV

111 MW

220kV

HPP KALIVAC

TITAN 220kV

150kV

Lura

5.8+2.3MW

Dardhe

B.C.Ri

30.78MWLume

Lapaj

13.6MW

Kolacem

220kV

KURUM

2x6

3M

VA

20 kV

2x4

0M

VA

20 kV

11.3MW

Klos

Ternove

Zall Bulqize

9.3MW

5.35MW

Banje

71.4MWMoglice

171.2MW

2X

15

0M

VA

Bitola

TIRANA3

Langarice10.35MW

12

MV

A

Ashta2

Ashta1

28.5MW

19.7MW

PODGORICE

PRISHTINE

LEZHE

105MW

26.9MW

83.45MW

12

0M

VA

Gramsh

9.5MW

8.25MW

6MW

Kucove

Novosele 30MW

Shala

Dragobi

Curraj

Darsi

7.6MW

Rapun1

400MVA

Farke

345MVA

Gj.Lalez

FANGU

PESHQESH

72MW

34MW

31.5MWGjorice

Velipoje

Prizren

Orikum

Himare

Gostime

Rapun3&4

Qarisht

16.1MW

11.34MW

37.3MW

200MW

Kombinat

Shutri

14

.9M

W

Prella

25MVA

6 MW

10MVA

Malla

16.5MW

14

.9M

W

4.8

MWS

eka

G.Z

i

Pre

lla

8.85MW

Stavec

5.5 MWKalivar Lumzi

11 MW

7.5 MWMal.Solar

Pilur-1

35MW

Corovode

90M

VA

Sllabinje11MW2.5 MW

Bishnice

Shpella

Sllab-2D

Llenga

3.6 MW

9.8 MW

3.53MW

GSA

Fe-Cr

Fushbull

21.5MW

Orenje16.72MW

Hotolisht7.77MW

Egnatia6 MW

SETA

14.9MW5.2MW

Lashkiza

Mati

38MW

14.8MW

120MVA

Lozhan

4.37MW

Kukur

6.38MW

Lusa1&2

G.Bardhe

Martanesh10.5MW

7.6MW

2x2

0

Gojan

9 MW

Bushtrica16.73MW

Lunik1&2

7 MW

99.5 MW

220kV

HPP POCEM

Vernik

Shushice

14.9MW

11.68MW

Suha1&210.585MW

PV

Wind

Lugano

40MW

PV

7.5 MWMal.Solar

Milot

30MW

Wind

38MW

Resfiks

Rreshen

35MW

Wind

12MW

Pilur

Wind

20.524MW

Iballe

Denas

14.97MW 6.39MWCemerice

22M

W

30

MW

23MWGrabove

8MWYlldon

_____________________________________________________________________________________


11

In the meantime other important projects are in the implementation phase and OST has a clear plan

for the development of the transmission system.

Recent realized projects in Albanian Transmission System

1. 400 kV Interconnection line Elbasan – Tirana – Podgorica.

2. 400/220/110 kV Tirana 2 Substation.

3. Rehabilitation of eight substations of transmission system.

The Project consists of two parts:

• Construction of new 400 kV transmission line Elbasan –

Tirana, 48 km financed by Italian Cooperation, 13 million

Euro.

• 400 kV transmission line Tirana – Podgorica, 155 km (125

km Albanian part) financed by German Government

through KfW bank, 42 million Euro.

The new 400 kV line Elbasan 2 - Tirana 2 – Podgorica was

put into operation on 10 May 2011.

The project is financed by Italian Cooperation, 25.8 million

Euros and consists on:

• Two 400/220 kV autotransformers of 2x300 MVA,

• Two 220/110 kV autotransformers of 2x120 MVA,

and respective 400 kV, 220 kV and 110 kV bays for the

connection to the transmission grid. The substation was put

in fully operation on 22 July 2011.

Rehabilitation of Transmission Substations is

realized by three projects:

• Rehabilitation of 220 kV Tirana1, Elbasan1

and Fieri Ss financed by World Bank, 17.9

million Euro.

• Rehabilitation of 220 kV Burrel Ss and 400

kV Elbasan2 Ss, financed by EBRD, 7.8

million Euro.

• Rehabilitation of 220 kV V.Deja, Koman

and Fierza Ss, financed by EBRD, 9 million

Euro.

_____________________________________________________________________________________


12

4. The construction of the 400 kV interconnection line, Tirana 2 – Kosova B

5. Strengthening of the 110 kV transmission network of the South of Albania

The project is a German Government

investment financed by KfW, 49 million Euro

and includes the construction of:

• New 110 kV line Vlore – Saranda,

approximately 105 km;

• New 110 kV line Erseke – Permet,

approximately 55 km;

• The reconstruction of the 110 kV lines

Korce – Erseke and Permet - Kelcyre-

Memaliaj approximately 79 km;

• The second circuit of double circuit line

Zemblak- Korce, 13 km.

• The strengthening of the 400/110 kV

Zemblak substation, 150 MVA.

The project is a German Government investment

financed by KfW Bank, 42 mil.€ Albanian Part

and includes:

• Substations Extension: New 120 MVAr

shunt reactor in Tirana2 Ss;

• 400 kV overhead line. Total length of the

line 242 km (162 km new line and 80 km

completion of second circuit of the part of

Tirana-Podgorica line, from Tirana to Lac

Qyrsaqe), 90 km Kosova part, and 152 km

Albanian part.

The projects consisted on the replacement of the depreciated primary equipment and in the

realization of a new monitoring control and protection system of all bays, a new automated

and computerized control system of substations.

The full project was commissioned on June 2016 and the line is ready to put into operation.

The full project was commissioned and putted in operation in December 2015.

_____________________________________________________________________________________


13

Ongoing Projects

1. Extension of 400 kV Koman Ss with an Auto-Transformer 400/220 kV

New very important Projects on the development of the transmission network

1. New 400 kV Interconnection Line Fier – Elbasan – Bitola (MK).

Benefits:

• Development of the existing 400kV network by closing the 400kV ring between Albania –

Macedonia – Greece,

• Improved network capacity to facilitate anticipated load and transit growth, new generation

connections, in the context of improving transmission capacity in Albania and Macedonia, and

in the Balkans region generally,

The project includes the:

• Extension of Koman Ss, with a new AT-345 MVA 400/220 kV, 400 kV double busbar and

two 400 kV line bays.

Benefits:

• This investment is necessary to enable a better balance between the 220 kV and 400 kV

grids by distributing the power flows generated by Koman HPP with the lowest losses;

• Significant improvement will also be felt in the voltage profile during good hydrology.

The project is under implementation stage and is expected to be in operation on the end of

2018.

The project includes the:

• Construction of a new 400 kV transmission line

Elbasan - Ohrid – Bitola, 151 km

(56 km in Albania territory)

• Extension of Elbasan2 Ss and installation of new 120 MVAr

shunt reactor.

• Construction of 68 km new 400kV line, from Elbasan2- Fier.

• Extension of Fier Ss, with 1 new AT-400 MVA.

_____________________________________________________________________________________


14

• Improvement of the reliability of the regional network, the overall security of supply, and

flexibility in the operational of the power system,

• A decrease of the technical losses in the transmission system,

• Elimination of overload in the national 220 kV ring.

• Improving the quality of electricity supply (normalize the voltage levels, stabilize the load flow

and the frequency fluctuations, etc.),

• Supporting the potential to develop the regional energy market in South East Europe and creating

trading opportunities with Bulgaria and Italy,

• Mutual support between Macedonia and Albania because of complimentarily of generation types

(Albania – hydro, Macedonia – thermal),

• Reducing the cost of providing reserve capacity, and providing mutual emergency support.

2. New 220 kV Double Circuit Transmission Line Tirana2 – Rrashbull.

• The project fulfills the requirements of the Albanian and European legislation regarding the

environment protection.

• The proposed investment is expected to have a positive impact on the total economy and to

improve the quality of life for the Albanian population;

• The project will increase opportunities for tourism development due to the improved power

supply;

The project includes the construction of:

• New 18.5 km double circuit 220 kV line

Tirana2-Rrashbull;

• Upgrade of Rrashbull Ss with 2 AT 150 MVA

The benefits:

• This project is crucial for the Albanian transmission system because it relates

to the following problems; existing line loaded at maximum, N-1 security

criteria not fulfilled, high transmission losses, and significant amounts of

non-served electricity.

• Will improve the supply of electricity in a very broad geographical area that

includes the district of Durres, Kavaja and throughout the southern part of

Albania.

The project construction phase is foreseen to start by the beginning 2019 and is expected to be in operation by the end of 2021.

The project construction phase is foreseen to start by the end of the 2019 and is expected to be in operation on 2021.

_____________________________________________________________________________________


15

3. Construction of the 400/110 kV Tirana3 Ss and reinforcement of 110 kV Tirana Ring.

The project includes the construction of:

• Construction of a new 400/110 kV Tirana3 Substation, with 2 New AT-150 MVA.

• Reinforcement of the 110 kV Tirana transmission network.

The benefits:

• Transit of the flow from 400 kV interconnection grid to 220 kV national grid; • Increase the security of system operation; • Transit of the flow from 400 kV interconnection grid to 220 kV national grid; • Increase the security of system operation considerably; • Greater quality of electricity supply as well as a more reliable supply for the Tirana area; • Decrease the losses in the transmission network; • Reduction of the non-served electricity. • The project fulfills the requirements of the Albanian and European legislation regarding

the environment protection.

The project construction phase is foreseen to start by the beginning 2019 and is expected to be in operation by the end of 2021.

This project and the previous one will be financed by a common financing package from KfW Bank.

albania transmission network development plan …...150 kv 110 kv 237 mw 35, 20, 10, 6 kv 1538.74 mw...

Documents