Tubas ELECTRICAL NETWORK STUDY
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Date
2011
Authors
Omar Abu-Omar
Ahmad Nerat
Sameed banifadel
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Abstract
Our project is to make a load flow study and analysis for TUBAS Electrical Network using ETAP software to improve the power factor and to reduce the electrical losses in the network and so, reducing the penalties in the total tarifffor the municipality, increasing the reliability of the network. More over we want to increase the capability of the transformers and the transmission lines Load flow analysis In power system analysis The Load Flow study is a basic and commonly needed electrical study. The Load Flow study will show the power in KVA or Amperes that is being handled by all of the individual electrical components, e.g. transformers, conductors and panels in the system. This allows a determination of equipment rating margins and reserve capacity loading percentage.Analysis and study of distribution electrical networks may cover conventional voltage drop analysis, power losses analysis, power factor considerations, capacitors placements (correction of power factor). Prospective goals of the study :- 1. Reduction of power losses 2. Increasing of voltage levels 3. Reducing the penalties by improving the P.F. 4. Increasing the capability of the transformers. 5. Increasing the reliability of the network . Methods of improvement of operating condition in electrical networks :- 1. Swing bus control 2. Transformer taps 3. Installation of capacitor banks (reactive power compensation) 4. Changing the configuration of distribution network (radial ring) Energy sector in Palestine Energy sector in Palestine faced sever since the Israeli occupation , financial and management obstacles due to the severe restrictions imposed by the Israeli occupation. as a result of this situation Palestine has not yet a unified power system , the existing network is local low voltage distributions networks connected to Israeli electrical corporation (IEC) , where around 97% of consumed energy were and still supplied by the IEC .The voltages of the existing distribution networks are : ( 0.4 , 6.6 , 11 , 22 , and 33 KV ) . IEC supplies electricity to the electrified communities by 22 or 33 KV by overhead lines .electricity is purchased from IEC and then distributed to the consumers. The existing electricity situation is characterized in old fashion over loaded networks , high power losses ( more than 20% ) , low power factor ,poor system reliability , high prices of electricity supplied to the consumer due to high tariff determined by the IEC in addition , many villages depend on diesel generators to provide their own needs of electrical energy .Due to all factors mentioned above, it becomes very important to design a national independent power system for the west bank of Palestine which will connect all the west bank areas by a reliable network to a national generating plant . the national power system should have the minimum annual cost and provide the consumer with a high quality of electric energy . this power system should also reduced the cost of KWH and be able to provide electricity to any area in the west bank . Information about Tubas town : TUBAS is a Palestinian city which is located in the north eastern part of the West Bank. Thecity is located to the west of the Governorate of Tubas. It is bordered by Tayasir and Alaqaba villages to the east, Aqqaba to the north, Aljadedah and Sereas villages (Jenin Governorate) to the west and Tamun and Alfarha to the south TUBAS ELECTRICAL NETWORK is provided by Israel electrical company(IEC) through an over head transmission line of 33 kv.The main circuit breaker is rated at (200 A).the max demand is reached (10MVA). The main supply for electrical distribution network in the tyaseer. And the voltage of the existing distribution networks are 33 kvonly.IEC supplies electricity to the electrified communities by 33 KV by overhead lines . Electricity is purchased from IEC and then distributed to the consumers.Palestine has not yet a unified power system , the existing network is local low voltage distributions networks connected to Israeli electrical corporation (IEC) , where around 97% of consumed energy were and still supplied by the IEC .