Every power system has three major components
Ø Generation: source of power, ideally with a specified voltage and frequency
Ø Load: consumes power; ideally with a constant resistive value
Ø Transmission System: transmits power; ideally as a perfect conductor

**POWER
SYSTEM ANALYSIS**

**INTRODUCTION**

Every
power system has three major components

^{Ø }Generation:
source of power, ideally with a specified voltage and frequency^{}

^{ }

^{Ø }Load:
consumes power; ideally with a constant resistive value^{}

^{ }

^{Ø }Transmission
System: transmits power; ideally as a perfect conductor^{}

**Complications**

^{Ø }No ideal
voltage sources exist^{}

^{ }

^{Ø }Loads are
seldom constant^{}

^{ }

^{Ø }Transmission
system has resistance, inductance, capacitance and flow limitations Simple
system has no redundancy so power system will not work if any component fails^{}

**Notation – Power**

Power:
Instantaneous consumption of energy

Power
Units

Watts = voltage x current for dc (W)

kW – 1
x 10^{3} Watt

MW – 1
x 10^{6} Watt

GW – 1
x 10^{9} Watt

Installed U.S. generation capacity is about 900 GW ( about 3 kW per person)

Maximum
load of Champaign/Urbana about 300 MW

**Notation – Energy**

Energy:
Integration of power over time; energy is what people really want from a power
system

Energy
Units

Joule = 1
Watt-second (J)

kWh – Kilowatthour
(3.6 x 106 J)

Btu – 1055
J; 1 MBtu=0.292 MWh

**Power System Examples**

^{Ø }Electric
utility: can range from quite small, such as an island, to one covering half
the continent there are four major interconnected ac power systems in North
American, each operating at 60 Hz ac; 50 Hz is used in some other countries.^{}

^{ }

^{Ø }Airplanes
and Spaceships: reduction in weight is primary consideration; frequency is 400
Hz.^{}

^{ }

^{Ø }Ships and
submarines^{}

^{ }

^{Ø }Automobiles:
dc with 12 volts standard^{}

^{ }

^{Ø }Battery
operated portable systems^{}

Tags : Power System Analysis - Introduction

Study Material, Lecturing Notes, Assignment, Reference, Wiki description explanation, brief detail