Distributed Power Systems ELCT 908

Distributed Power Systems

For Electrical EngineeringFaculty of Engineering

UNTIRTAThe CourseThis course introduces IET students to an important engineering topic thats closely related to their field in real life.

Students learn electric power engineering concepts and develop technical expertise in this specialized field.

Power Systems Power systems are responsible for generating electrical power, transmitting this power and then distributing it to customers at voltage levels and reliability that are appropriate to various users.

System Layout GenerationTransmissionDistributionCustomer ServiceDifferent TechnologiesExtra High VoltageMedium and Low voltage

Directions of ResearchPower system analysis.Power system planning.Power system control.Power system protection.Power quality.Load management.Distributed generation.Structure Of The CourseModeling of system ComponentsThree Phase andPer-unit systems

System Analysis and ControlSystem ProtectionCourse SyllabusIntroduction.[1 lecture ]Modeling of Power system components. [3 lectures]The Per- unit system.[1 lecture ]Power flow analysis and control. [2 lectures]Short circuit analysis[2 lectures]System protection[1 lecture ]Distributed Generation. [1 lecture ]Marking SchemeQuizzes (Best 2 of 3)10Tutorial Assignments10Reports15Mid Term Examination25Examination and Lab. Final40Total1009Schedule of ClassesLectures: Tuesdays , 3rd slot in H10.

Instructor office hours every Sunday from 11:00 to 1:00 p.m.

Tutorials : Tuesdays , 5th slot in H10 .

10ReferencesElectrical Energy Systems, Mohamed El-Hawary, CRC Press 2000, ISBN 0-8493-2191-3.AC Power Systems Handbook, Jerry Whitaker, CRC Press 1999, ISBN 0-8493-7414-6.Journals and Conferences papers. 11OverviewWhat is a Power System?

What is the function of the system?

Power system includes all parts of an electric system power sources and customers.The Function of the system is to generate power , transmit this power and to distribute it to customers at voltage levels and reliability that are appropriate to various users.

Thermal Power Station14Gas Power Station

Hydraulic Power Station

System ComponentsWhat are the main component of a power system?

Generation plantsHV Substations Transmission LinesBulk power SubstationsDistribution systemSingle Line Diagram

Voltage levelsGeneration: 1kV-30 kVEHV Transmission: 500kV-765kVHV Transmission: 230kV-345kVSubtransmission system: 69kV-169kVDistribution system: 120V-35kVOverviewPower plants convert the energy stored in the fuel or hydro into electric energy. The energy is supplied through step-up transformers to the electric network. Power systems are comprised of 3 basic electrical subsystems.Generation subsystemTransmission subsystemDistribution subsystemHigh Voltage NetworkHigh-voltage networks, consist of transmission lines, connects the power plants and high-voltage substations in parallel.This network permits load sharing among power plants The typical voltage of the network is between 240 and 700 kV.The high-voltage substations are located near the load centers. Subtransmission NetworkThe subtransmission system connects the high-voltage substations to the distribution substations. The typical voltage of the subtransmission system is between 138 and 69 kV.In high load density areas, the subtransmission system uses a network configuration that is similar to the high voltage network. In medium and low load density areas, the loop or radial connection is used. Distribution NetworkThe distribution system has two parts, primary and secondary. The primary distribution system consists of overhead lines or underground cables, which are called feeders. The feeders supply the distribution transformers that step the voltage down to the secondary level.The secondary distribution system contains overhead lines or underground cables supplying the consumers directly by single- or three-phase power. One Line Diagram