Assumption University Thailand EE4503 Electrical Systems Design Introduction 1

Assumption University Thailand Topics Understand the electrical systems design Know the standards used in this class Electrical Power Systems –Production / Generation –Transmission –Distribution + Utilization 2

Assumption University Thailand Electrical Systems Design 3

Assumption University Thailand What we have to do? Design the electrical systems according to the standards Know the standards Apply the standards Know theory behind the standards Rules, Regulations  Laws 4

Assumption University Thailand Where? 5

Assumption University Thailand Electrical Power Systems –Delivery of the electrical power to the users –Protection of the electrical systems Communication Systems –Delivery of the electrical signal What? 6

Assumption University Thailand Telephone Systems Fire Alarm Systems Master Antenna TV Systems Security & Closed Circuit TV Systems Sound Systems Building Automation Systems What is Communication Systems? 7

Assumption University Thailand Power Distribution Systems Lighting Systems Standby Power Systems Lightening Protection Systems Vertical Transportation Systems (today might include horizontal as well) What is Electrical Power Systems? 8

Assumption University Thailand Design the electrical systems according to –Safety (including Standards, Rules, Regulations) –Customer need Cooperate with others: mechanical and civil Detail specifications of the systems Cost estimation What do we have to do? 9

Assumption University Thailand Single Line Diagrams –Riser Diagram Load Schedule Tables Plans –Lighting –Receptacles What are outcomes? 10

Assumption University Thailand Requirements Specifications –Equipment Installation Details Wiring diagrams What are outcomes (details)? 11

Assumption University Thailand Safety Minimum Initial Investment Maximum Electrical Efficiency (Minimum Operating Costs): e.g. power factor control, transformer loss, zoning lighting control Minimum Maintenance Cost What is a Good Design? 12

Assumption University Thailand Maximum Service Continuity: depend to the need, e.g. hospital, office, computer center Maximum Flexibility and Expandability Maximum Power Quality: think about turning on an air condition then computer hangs. What is a Good Design? 13

Assumption University Thailand Standards 14

Assumption University Thailand Common agreement on some technical issues : Standards for electrical equipment –Cable, Circuit breaker, Switch, etc. Standards for installation –Safety distance between 12kV cable What are standards? 15

Assumption University Thailand National Standards: to server the need of each country –NEC, ANSI, BS, DN, VDE, JIS, TIS ( มอก.) International Standards –ISO, IEC, EN Is there a single standard? 16

Assumption University Thailand Standard Comparison (examples) Frequency: 60 Hz Voltage: 208/120V, 480/277V Cable: AWG Dimension: inch, feet Weight: pound Frequency: 50 Hz Voltage: 380/220V, 400/230V Cable: mm 2 Dimension: m Weight: kg Electrical System Design, ประสิทธิ์ พิทยพัฒน์ 17

Assumption University Thailand Electrical Symbols 18

Assumption University Thailand Electrical Symbols 19

Assumption University Thailand Electrical Symbols 20

Assumption University Thailand Electrical Power Systems 21

Assumption University Thailand Overview of Power Systems 22

Assumption University Thailand Steam power plant: from lignite, oil, natural gas to nuclear Combustion power plant: gas-turbine, diesel Combined Cycle power plant: combined the above two Electrical Power Plant (major) 23

Assumption University Thailand Hydro power plant: Dam, pico-hydro Solar cell Wind turbine ** Stream power plant: stirling engine Electrical Power Plant (minor) 24

Assumption University Thailand EGAT: Electrical Generating Authority of Thailand –Generation / Transmission MEA: Metropolitan Electricity Authority –Transmission / Distribution / Utilization PEA: Provincial Electricity Authority –Gen. / Trans. / Distribution / Utilization Big Three by Thai Law 25

Assumption University Thailand EGAT is the main electrical power generation (by law) Private Power Producer (sell to EGAT) –Independent Power Producer (IPP) –Small Power Producer (SPP) Generation 26

Assumption University Thailand Long distance distribute of power High voltage High reliability (N-1, N-2, etc.) Network of Transmission  Power Grid –High reliable, efficiency Transmission 27

Assumption University Thailand ASEAN Power Grid 28

Assumption University Thailand Low voltage –220V 1 phase 2 wires –380/220V 3 phase 4 wires High voltage –12kV (11kV), 24kV (22kV) –69kV, 115kV Distribution 29

Assumption University Thailand Simple Radial Primary-Selective System Secondary-Selective System Loop-primary system etc. Backbone Distribution 30

Assumption University Thailand Electrical Power Distribution Systems Operations, D.B.Campbell Backbone Distribution Simple Radial 31

Assumption University Thailand Electrical Power Distribution Systems Operations, D.B.Campbell Backbone Distribution Secondary Selective 32

Assumption University Thailand Electrical Power Distribution Systems Operations, D.B.Campbell Backbone Distribution Primary Selective 33

Assumption University Thailand Depend on the area Overhead cable Underground cable from Overhead cable Underground cable from Underground cable Distribution to End-user 34

Assumption University Thailand Electrical Systems Design, ประสิทธิ์ พิทยพัฒน์ Electrical Power Distribution Systems Operations, D.B.Campbell Reference 35