Applications, Advantages/Disadvantage of Power Electronics (32:15)

Applications, Advantages/Disadvantage of Power Electronics

Lecture Notes

Power Electronics has wide range of applications . They are listed below.

Applications of power Electronics in Power system

In a power System network,

i) Reactive power compensation – We use power electronics devices like TCR, TCS, SVC, STATCOMS for reactive power compensation .

ii) Active power control – For active power control we use UPFC(unified power flow control) . This devices are known as Facts devices because for flexible ac transmission these devices are used.

iii) Stability Enhancement – Power Electronic devices enhance the stability of the devices. So this is also one of the application.

iv) Active filters – Active filters are used to decrease the harmonic component in power system.

v) HVDC transmission

The next application is the HVDC transmission , HVDC transmission has two ends, one is transmission end and the other is the distribution end.

In transmission end, we will convert ac power to dc power and in receiving end we will convert dc power to ac power.

These are some of the application of power electronics in power system.

Application of power electronics in the field of Transportation

a) Power electronics devices is used in railway for electrical traction . Railways uses induction motor in electrical traction. To control the speed of the train we use power electronic converters.

b) In aircraft , we need an UPS.

c) It road transportation we use power electronic devices in Electric vehicles (buses, cars). Electric vehicles need to be charged , for charging purpose we use power electronic converters.

Application of power electronic in day to day life

For domestic applications, power electronics is used in battery chargers, induction stove, fan regulators, refrigerators, air conditioner , heaters.

Application of power electronic in renewable energy sources

Renewable energy sources

a)solar

The circuit diagram for solar energy sources is

b) wind

Interdisciplinary nature of Power Electronics

Power electronic devices are used in various subjects of electrical engineering. The interdisciplinary shown by the diagram below.

Advantages of Power Electronics

i) No mechanical losses as rotating electrical machines

ii) Switching operation losses are less.

iii) Heat delivered will be less. Less failure mode.

iv) Good reliability

v) External cooling requirement is less.

vi)Fast dynamic response compared to electro-mechanical system.

vii) Controlled effectively in closed loop operation.

viii) Generate harmonics

ix) Low input power factor

x) Power regeneration is not easy.