1. Impact of distributed generation on power system: Case study
Astrit BARDHI
Myrteza BRANESHI
Alfred PJETRI

2. In this paper we will study the impact of small hydropower plants (SHP’s) built in recent years in Albanian power system such as energy efficiency, improvement of voltage level and increase of capacity of transmission power lines and social impact.

3. Content The status of power system in Albania
Impact of small hydropower plants on power system: case study
The state of regional power system before Tervol SHP
The state of regional power system after Tervol SHP
Progress of small hydropower plants development in Albania
Environmental and social impact of SHP’S
Conclusions

4. The status of power system in Albania
Over 90% of Albanian electricity is produced by hydro power plants
The structural scheme of power system in Albania is radial: power generation – transmission lines - distribution
Power quality, mainly in south Albania, has low voltage levels at some nodes and significantly transmission power losses
The annual energy production by hydropower plants depend on climatic conditions

5. The status of power system in Albania

6. The status of power system in Albania

7. Impact of distributed generation on power system: case study

8. THE STATE OF REGIONAL POWER SYSTEM BEFORE TERVOL SHP BUILT

9. THE STATE OF REGIONAL POWER SYSTEM BEFORE TERVOL SHP BUILT
Load
Voltage nodes
[nominal percentage voltage]
Power losses
Cerrik
Radio
Cerrunje
Branch
Gramsh kW
100 20
98.91
98.22
97.92
98.01
97.79
25.7 40
97.69
96.29
95.67
95.85
95.40
106.6 60
96.30
94.14
93.17
93.45
92.75
250.1 80
94.69
91.68
90.33
90.73
89.76
472.5
92.77
88.80
87.03
87.55
86.27
811.5

10. THE STATE OF REGIONAL POWER SYSTEM AFTER TERVOL SHP BUILT

11. THE STATE OF REGIONAL POWER SYSTEM AFTER TERVOL SHP BUILT
Load
Voltage nodes
[nominal percentage voltage]
Power losses
Cerrik
Radio
Cerrunje
Branch
Gramsh kW
99.92
100.69
101.14
101.13
145 20
98.91
99.03
99.19
99.28
99.06
74.5 40
97.77
97.20
97.06
97.25
96.80
83.2 60
96.47
95.17
94.71
94.99
94.30
146.5 80
94.98
92.88
92.06
92.45
91.50
261.5
100
93.21
90.23
89.01
89.52
88.27
452.5

12. Impact of Small HPP’s in Power System – Case study
Load
Voltage nodes
[nominal percentage voltage]
Power losses
Cerrik
Radio
Cerrunje
Branch
Gramsh kW
100 20
98.91
98.22
97.92
98.01
97.79
25.7 40
97.69
96.29
95.67
95.85
95.40
106.6 60
96.30
94.14
93.17
93.45
92.75
250.1 80
94.69
91.68
90.33
90.73
89.76
472.5
92.77
88.80
87.03
87.55
86.27
811.5
Load
Voltage nodes
[nominal percentage voltage]
Power losses
Cerrik
Radio
Cerrunje
Branch
Gramsh kW
99.92
100.69
101.14
101.13
145 20
98.91
99.03
99.19
99.28
99.06
74.5 40
97.77
97.20
97.06
97.25
96.80
83.2 60
96.47
95.17
94.71
94.99
94.30
146.5 80
94.98
92.88
92.06
92.45
91.50
261.5
100
93.21
90.23
89.01
89.52
88.27
452.5

13. Impact of distributed generation on power system: case study

14. Impact of distributed generation on power system: case study

15. Impact of Small HPP’s in Power System
Before SHPs
After SHPs

16. Impact of Small HPP’s in Power System
The power produced by HPPs has the possibility to supply the consumers with increased power quality at a better level.
The HPPs reduce the power losses and increase the capacity of transmission lines.
The HPPs improved the efficiency of power system
The small hydropower plants provides better utilization and optimization of water sources at Fierza Lake and Drini Cascade.
HPPs have riarioty producing green energy, with minimal environmental impact and reduce CO2 in atmosphere.
Inncreased the transmission capacity of power lines

17. Progress of small hydropower development in Albania
In recent years in Albania, are installed many of small hydropower plants
Small hydropower plants are usually connected at distributed power system.
The small hydropower plants are with canal deviation
Many small hydropower plants are built by private investors

18. Progress of small hydropower development in Albania
year
Kesh Gen
SHPs
Coeficient of Esmall/Ekesh gen
Installed power
Annual production
Number of small hydropower plant plants
Power by SHP/ power by other power stations kW
MWh
pieces %
2006
1,431,000
5,516,000 27
26.017
1.82
61,918
1.12
2007
2,933,000 33
27,454
1.92
59,177
2.02
2008
3,770,000 34
27,759
1.94
62,025
1.65
2009
5,201,000 35
28,009
1.96
89,306
1.72
2010
7,555,000 43
53,194
3.72
159,040
2.11
2011
1,350,000
3,899,477 53
77,854
5.77
136,831
3.51
2012
4,027,012 69
142,104
10.53
290,998
7.23
2013
5,811,762 90
226,004
16.74
548,148
9.43

19. YEARLY production BY shp

20. Ratio coefficient Ssmall / Sgen

21. SMALL HYDRO POWER PLANTS IN ALBANIA

22. Conclusions
SHP’s impacts in power system by improving the power at a better level of quality for consumers.
SHP’s reduce the power losses and “increase” the capacity of transmission lines improving the power system efficiency.
SHP’s provides better utilization and optimization of water sources at Fierza Lake and Drini Cascade.
SHP’s green energy, with minimal environmental impact and reduce CO2 in atmosphere.
SHP’s have an economical impact in the region by employing local residents for service and maintenance

23. Thank You