strategic planning for nablus power system
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Strategic planning for Nablus power system. Prepared by: Aya Kamal Alawneh Amal Nazzeh Allan Presented to : Dr. MAHER KHAMMASH. - PowerPoint PPT PresentationTRANSCRIPT
Strategic planning for Nablus power
system
Prepared by: Aya Kamal Alawneh Amal Nazzeh Allan
Presented to: Dr. MAHER KHAMMASH
• Our project is to make a load flow study and analysis for MojeerAldeen& Aljam3a and Kamal jomblat (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
Outlines
Nablus electrical network
Electrical Network Improvements
1.1 Simulation For Mojeer Al deen Network fed from Quseen
1.1.1 FOR MAXIMUM CASE
Max. load case results with improvement
MW Mvar MVA % PF
Swing
Bus(es):
7.597 2.616
8.03 94.55Lag
Apparent
Losses:
0.098 0.631
∆P% 1.29
Max. load case results without improvement
MW Mvar MVA % PF
Swing
Bus(es):7.8 2.8 8.2 88.8 lag
Apparent
Losses:0.122 0.71
∆P% 1.56
Electrical Network Improvements
V% Mojeer Al deen Network from Quseen(max)
1.05 Vnominal <V<1.1 Vnominal
Electrical Network Improvements
PF for Mojeer al deen from QuseenMax case
Electrical Network Improvements
• 1.1.2 FOR MINIMUM CASE• we reduce the loads to 40% from the original case
Min. load case results without improvement
MW Mvar MVA % PF
Swing
Bus(es):2.902 1.476 3.255 89.14 lag
Apparent
Losses:0.017 0.058
∆P% 0.586
Min. load case results with improvement
MW Mvar MVA % PF
Swing
Bus(es):2.8 1.015 3.131 94.59 lag
Apparent
Losses:0.015 0.054
∆P% .541
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
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 saving
S.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
Electrical Network Improvements
• ∆∆P=saving in real power losses ==∆Pbefore-∆Pafter=0.024
Z∆p= annual saving in real power cost ==∆∆p*T*100== T=the time of max loss $/MWH=100• Kc=cost of capacitor= cost of capacitor per KVAr * capacitor KVAr
Kc=0 .55*4000 + 0.59*10000 =8100$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
Economical for Mojeer al deen from QuseenMax case
Electrical Network Improvements
1.2 Simulation For Mojeer Al deen Network Fed from Sara
1.2.1 FOR MAXIMUM CASE
Max. load case results with improvement
MW Mvar MVA % PF
Swing
Bus(es):
8.200
2.3988.544 95.98Lag
Apparent
Losses:
0.110 0.398
∆P% 1.34
Max. load case results without improvement
MW Mvar MVA % PF
Swing
Bus(es):8.3 2.49 8.211
95.94
Lag
Apparent
Losses:0.18 0.4
∆P% 2.1
Electrical Network Improvements
V% Mojeer Al deen Network from Sara(max)
Electrical Network Improvements
PF for Mojeer al deen from SaraMax case
Electrical Network Improvements
• 1.2.2 FOR MINIMUM CASE
M. load case results without improvement
MW Mvar MVA % PF
Swing
Bus(es):
3.227 0.857 3.33896.66 lag
Apparent
Losses:0.018 .061
∆P% 0.558
Min. load case results with improvement
MW Mvar MVA % PF
Swing
Bus(es):3.163 0.839 3.272 96.67Lag
Apparent
Losses:0.016 0.059
∆P% .506
Electrical Network Improvements
1.3 Simulation For Aljam3a and Kamal jomblat Network fed from Quseen
1.3.1 FOR MAXIMUM CASE
Max. load case results with improvement
MW Mvar MVA % PF
Swing
Bus(es):5.38 2.38 6.397 92.82La
g
Apparen
t Losses:
0.290 0.478
∆P% 5.4
Max. load case results without improvement
MW Mvar MVA % PF
Swing
Bus(es):
5.747 3.082 6.521 88.12Lag
Apparent
Losses:0.333 0.528
∆P% 5.8
Electrical Network Improvements
V% V% Aljam3a and Kamal jomblat Network in Quseen (max)
1.05 Vnominal <V<1.1 Vnominal
Electrical Network Improvements
P.F Aljam3a and Kamal jomblat NetworkFrom quseen
Electrical Network Improvements
• ∆∆P=saving in real power losses ==∆Pbefore-∆Pafter=0.043
Z∆p= annual saving in real power cost T=the time of max loss $/MWH=100 ==∆∆p*T*100=
• Kc=cost of capacitor= cost of capacitor per KVAr * capacitor KVAr Kc= 0 .135*4000 + 0.55*10000= =6040$ 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
Economical for Aljam3a and Kamal jomblat from QuseenMax case
Electrical Network Improvements
• 1.3.2 FOR MINIMUM CASE
Min. load case results without improvement
MW Mvar MVA % PF
Swing
Bus(es):2.902 1.476 3.255 89.14 lag
Apparent
Losses:0.089 .098
∆P% 3%
Min. load case results with improvement
MW Mvar MVA % PF
Swing
Bus(es):2.593 0.955 2.763
93.83Lag
Apparent
Losses:0.057 0.091
∆P% .2.1%
Chapter(1) :Electrical Network Improvements
1.4 Simulation For Aljam3a and Kamal jomblat Network FED from Sara case
1.4.1 FOR MAXIMUM CASE
Max. load case results with improvement
MW Mvar MVA % PF
Swing
Bus(es):6.063 1.042 6.447
98.69
Lag
Apparent
Losses:0.296 0.488
∆P% 4.6
Max. load case results without improvement
MW Mvar MVA % PF
Swing
Bus(es):
6.2451.776 6.493
96.19
Lag
Apparen
t Losses:0.330 0.524
∆P% 5.2
Electrical Network Improvements
V% V% Aljam3a and Kamal jomblat Network in Sara (max)
Electrical Network Improvements
P.F Aljam3a and Kamal jomblat NetworkFrom Sara
Electrical Network Improvements
• 1.4.2 FOR MINIMUM CASE
MIN. load case results without improvement
MW Mvar MVA % PF
Swing
Bus(es):
2.90.87 3
96.19
Lag
Apparent
Losses:0.055 0.087
∆P% 1.89
Min. load case results with improvement
MW Mvar MVA % PF
Swing
Bus(es):2.504 0.595 2.574 97.29
Lag
Apparen
t Losses:0.047 0.075
∆P% 1.87
For mojeer al deen
Quseennetwork
Saranetwork
Max. load case results with improvement
MW Mvar MVA % PF
Swing
Bus(es):
7.597
2.6168.03 94.55Lag
Apparent
Losses:
0.110 0.398
∆P%
1.34
Max. load case results with improvement
MW Mvar MVA % PF
Swing
Bus(es):
8.200
2.3988.544 95.98Lag
Apparent
Losses:
0.098 0.231
∆P%
1.29
For Aljam3a and Kamal jomblatQuseennetwork
Sara network
Max. load case results with improvement
MW Mvar MVA % PF
Swing
Bus(es):5.38 2.38 6.397 92.82La
g
Apparen
t Losses:0.296 0.488
∆P%
5.4
Max. load case results with improvement
MW Mvar MVA % PF
Swing
Bus(es):6.063 1.042 6.447
98.69
Lag
Apparent
Losses:
0.290 0.478
∆P%
4.6
Comparison between the Quseen
and Sara networks
Quseen network
Sara network
-Its fed from Quseen connection point
-It has low P.F& higher Losses
- 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 Quseen network
Optimization of the electrical network
2.1 Replacing transformers
The table below shows the values
of apparent power
and the load factor before and after the replacing:
Summary
Apparent Losses for mojeer al deen
2.2 : Operation mode of medium voltage distribution feeders:
Medium voltages (MV) are radialy..
We construct ring network to insure back-up connections to improve the reliability of the system. .
In MOJEER ALDEEN network we should construct rings for all four main feeders (on 6.6kv) after the switch gear ,between every two adjacent feeders
The main transmission line is ACSR ( cross sectional area120) Carries an electric current up to 395A.
Optimization electrical network
• But at worst condition they carry currents as the following
Optimization electrical network
Optimization electrical network
• Ring between ALENJELE and ALITHAD feeder:
• Ring between ALM3AJEN and ALDARDOK feeder:
Ring between ALMAHKAMA and ALENJELE feeder
Summary
Optimization electrical network
Suggestion for Location of substation
2.3 Design substation
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
• This figure shows the configuration of substation
Optimization electrical network
• Electrical Network Supply• Nablus are fed from 4 connection point by Israel Electrical Company (IEC),
At 33KV as following:
Future planning for connection point
Nablus
1.Asker
(odeleh & Almeslekh)
30MVA 2.Sa
ra 40MV
A
3 .Innab 7MVA
4 .Howwara 20
MVA
Sara
Carraco
n
Transformer(33-11KV) 10MVA
Transformer(33-11KV) 10MVA
Al jam3a
Mojeer Al
deen
Transformer(33-11KV) 10MVA
Transformer(33-11KV)
10MVA
Transformer(33-11KV)
5MVA
Element of sara connection point
• Transmission Line • There are two type of conductor:1.ACSR 150mm22.XLPE cables 240mm2 • The resistance and reactance of XLPE and ACSR in table below
(A) Transmission Line DataMV Cable XLPEResistance (Ω/Km) 0.0975 Reactance (Ω/Km) 0.11486Length (Km) 3.7 Length (Km) 3.7Resistance (Ω) 0.36075 Reactance (Ω) 0.424982
MV overhead line ACSRResistance (Ω/Km) 0.223 Reactance (Ω/Km) 0.257Length (Km) 4.7 Length (Km) 4.7Resistance (Ω) 1.0481 Reactance (Ω) 1.2079
Future planning for connection point
4.1 Strategic planning for the network
.Power (W)consumption in last ten year
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:
Future planning for connection point
Future planning for connection point
4.2 Recommended and solution
Future planning for connection point
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
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
Protection Analysis and Design
• To make differential protection for the power transformer as the following figure:
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
Protection Analysis and Design
t0 :operating time
Thank
• We thanks Dr.maher khammash
• We thanks NEDECO for cooperation with us especially for :
Eng. Shadia QamheyeEng.Allam Abd AlfattahEng.Samah Alnamer