Strategic planning for Nablus power system

1. Strategic planning for Nablus power system Prepared by: Aya Kamal Alawneh Amal Nazzeh Allan Presented to: Dr. MAHER KHAMMASH

2. Our project is to make a load flow study and analysis for MojeerAldeen& Aljam3a and Kamaljomblat (Nablus) Electrical Network using ETAP software • to improve the power factor • to reduce the electrical losses in the network • to increase the capability of the transformers and the transmission lines

3. Outlines

4. Nablus electrical network

5. Electrical Network Improvements 1.1 Simulation For Mojeer Al deen Network fed from Quseen 1.1.1 FOR MAXIMUM CASE

6. Electrical Network Improvements V%Mojeer Al deen Network from Quseen(max) 1.05 Vnominal <V<1.1 Vnominal

7. Electrical Network Improvements PF for Mojeer al deen from Quseen Max case

8. Electrical Network Improvements • 1.1.2 FOR MINIMUM CASE • we reduce the loads to 40% from the original case

9. Electrical Network Improvements • 1.1.3 The economical study • ∆∆P=∆Pbefore,cap - ∆Pafter,cap∆∆P:saving in real power losses∆Pbefore,cap : real power losses before adding capacitor ∆Pafter,cap : real power losses after adding capacitor Z∆p=∆∆p*T*100Z∆p : annual saving in real power cost • T max =the time of max loss = 3800 h 100:cost per MWh($/MWh) Kc=C*QcKc :cost of capacitorC: cost of capacitor per KVAr($/KVAr)Qc: capacitor KVAr

10. Electrical Network Improvements • Fixed Cap=4000($/MVAr). Regulated Cap= 10000 ($/MVAr) Zc =0.22*KcZc :annual capacitor running cost0 .22: maintenance & life time of capacitor (depreciation factor)∆Z=Z∆p-Zc∆Z: annual savingS.P.B.P=investment(capacitors initial cost)/ total annual savingS.P.B.P < 2year →→→project is visible S.P.B.P > 2year →→→project is not visible

11. Electrical Network Improvements Economical for Mojeer al deen from Quseen Max case • ∆∆P=saving in real power losses ==∆Pbefore-∆Pafter=0.024Z∆p= annual saving in real power cost ==∆∆p*T*100== T=the time of max loss $/MWH=100 • Kc=cost of capacitor= cost of capacitor per KVAr * capacitor KVArKc=0 .55*4000 + 0.59*10000 =8100$Zc= annual capacitor running cost ==0.22*Kc=1782 $/ year • ∆Z= annual saving =Z∆p-Zc=9120 - 1782==7338 Which is > 0 good design • S.P.B.P =Kc/∆Z =8100/7338=1.1 year which is feasible

12. Electrical Network Improvements 1.2 Simulation For Mojeer Al deen Network Fed from Sara 1.2.1 FOR MAXIMUM CASE

13. Electrical Network Improvements V%Mojeer Al deen Network from Sara(max)

14. Electrical Network Improvements PF for Mojeer al deen from Sara Max case

15. Electrical Network Improvements • 1.2.2 FOR MINIMUM CASE

16. Electrical Network Improvements 1.3 Simulation For Aljam3a and Kamal jomblat Network fed from Quseen 1.3.1 FOR MAXIMUM CASE

17. Electrical Network Improvements V%Aljam3a and Kamal jomblat Network in Quseen (max) V% 1.05 Vnominal <V<1.1 Vnominal

18. Electrical Network Improvements P.F Aljam3a and Kamal jomblat Network From quseen

19. Electrical Network Improvements Economical for Aljam3a and Kamaljomblat from Quseen Max case • ∆∆P=saving in real power losses ==∆Pbefore-∆Pafter=0.043Z∆p= annual saving in real power cost T=the time of max loss $/MWH=100 ==∆∆p*T*100= • Kc=cost of capacitor= cost of capacitor per KVAr * capacitor KVArKc= 0 .135*4000 + 0.55*10000= =6040$ Zc= annual capacitor running cost ==0.22*Kc= 1329 $/ year • ∆Z= annual saving =16340 - 1329==15011 Which is > 0 good design • S.P.B.P =Kc/∆Z = = 4.8 months which is feasible

20. Electrical Network Improvements • 1.3.2 FOR MINIMUM CASE

21. Chapter(1) :Electrical Network Improvements 1.4 Simulation For Aljam3a and Kamal jomblatNetwork FED from Sara case 1.4.1 FOR MAXIMUM CASE

22. Electrical Network Improvements V%Aljam3a and Kamal jomblat Network in Sara (max) V%

23. Electrical Network Improvements P.F Aljam3a and Kamal jomblat Network From Sara

24. Electrical Network Improvements • 1.4.2 FOR MINIMUM CASE

25. For mojeer al deen Sara network Quseen network

26. For Aljam3a and Kamal jomblat Sara network Quseen network

27. Comparison between the Quseen and Sara networks Quseen network Saranetwork • Its fed from Sara connection • Its has a high p.f due to transfer loads from Quseen to Sara connection point • So the p.f increase and lower losses than the Quseennetwork -Its fed from Quseen connection point -It has low P.F & higher Losses

28. Optimization of the electrical network 2.1 Replacing transformers The table below shows the values ofapparent power and the load factor before and after the replacing: Summary Apparent Losses for mojeer al deen

29. Optimization electrical network 2.2 : Operation mode of medium voltage distribution feeders:

30. Optimization electrical network • But at worst condition they carry currents as the following

31. Optimization electrical network • Ring between ALM3AJEN and ALDARDOK feeder: • Ring between ALENJELE and ALITHAD feeder:

32. Ring between ALMAHKAMA and ALENJELE feeder Summary

33. Optimization electrical network 2.3 Design substation Suggestion for Location of substation

34. Optimization electrical network The main purpose of substation mainly feds hospitals and north region (Aseera Al Shmalia) and it is near the loads and it decreases losses so the current reach the customer in good quality also to improve ring system

35. Optimization electrical network • This figure shows the configuration of substation

36. Future planning for connection point • Electrical Network Supply • Nablus are fed from 4 connection point by Israel Electrical Company (IEC), At 33KV as following:

37. Element of sara connection point • Transmission Line • There are two type of conductor: 1.ACSR 150mm2 2.XLPE cables 240mm2 • The resistance and reactance of XLPE and ACSR in table below

38. Future planning for connection point 4.1 Strategic planning for the network . Power (W)consumption in last ten year

39. Future planning for connection point Load Flow Results • we can summarize the forecasted results, total generation, demand , loading., percentage of losses, and the total power factor for the maximum case in future ten years in Nablus network as in tables below:

40. Future planning for connection point

41. Future planning for connection point 4.2 Recommended and solution

42. Future planning for connection point

43. Protection Analysis Why protection system is needed • Personnel saifty against electrical hazards . • Avoid equipment stress(thermal,electrical,mechanical damages) . • make network stability . • Clear electrical faults and maintain service continuity • Short cct calculation : In our project we use Etap program to calculate the maximum currents for three regions East , MEDIUM and WEST loads .and we get the required short cct current from NEDCO

44. Protection Analysis • Selection of circuit breaker : • I C.B ≥ K safty*Imax load K safty=1.3 • V C.B ≥ Vsystem • I breaking capacity ≥ 1.2 Is.c • Selection of instrument transformer : • Potential transformer : Vs= 110v but V p≥ V source • Current transformer : Is=5 A but I p≥ 1.1Imaxload

45. Protection Analysis and Design • To make differential protection for the power transformer as the following figure:

46. Protection Analysis and Design • The relay which we used is (inverse time relay ) • The aim of the protection in our project is how to achive selectivity between cct breakers • The following eqn is to calculate the setting (T)time of each relay T=t0/K • T: setting time • t0 :operating time • K: factor depend on the type of the relay curves

47. Protection Analysis and Design t0 :operating time

48. Thank • We thanks Dr.maherkhammash • We thanks NEDECO for cooperation with us especially for : Eng. ShadiaQamheye Eng.AllamAbdAlfattah Eng.SamahAlnamer