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Role of Power Electronics for Safety and Conservation of Electrical Energy. Ramjee Lal Meena Department of Electrical Engineering Delhi Technological University, Delhi-42. ORGANISATION OF THE PRESENTATION. Introduction to Power Electronics Power Semiconductor Device (PDS) Power Converter

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role of power electronics for safety and conservation of electrical energy

Role of Power Electronics for Safety and Conservation of Electrical Energy

RamjeeLalMeena

Department of Electrical Engineering

Delhi Technological University, Delhi-42

organisation of the presentation
ORGANISATION OF THE PRESENTATION
  • Introduction to Power Electronics
  • Power Semiconductor Device (PDS)
  • Power Converter
  • Power Processor
  • Advantage of Power Electronics
  • Applications of Power Electronics for Electrical Energy

Contd.

contd
Contd.
  • Emphasis of applications of Power Electronics in  the area of Safety, Conservation, Power Quality and Renewable Sources
  • Practical possible use of PE at  home
  • Trends of Power Electronics
  • NaMPET : GOI Mission
power electronics
Power Electronics
  • Power Electronics is the electronics applied to conversion and control of electrical power.
  • Range of Power Scale
  • Milliwatts(mW) Megawatts(MW) Gigawatts(GW)
  • The primary task of Power Electronics is to process and control flow of electrical energy by supplying voltages and currents in a form that is optimally suited for user loads
power semiconductor devices
Power Semiconductor Devices
  • Power Diode
    • Uni-polar,
    • uncontrolled,
    • switching device
    • used in applications such as rectification and
    • circuit directional current control.
slide7
SCR: Silicon Controlled Rectifier
  • This semi-controlled device turns on when a gate pulse is present and the anode is positive compared to the cathode.
  • When a gate pulse is present, the device operates like a standard diode.
  • When the anode is negative compared to the cathode, the device turns off and blocks positive or negative voltages present.
  • The gate voltage does not allow the device to turn off
slide8
Gate Turn Off Thyristor
  • The GTO, unlike an SCR, can be turned on and off with a gate pulse.
  • One issue with the device is that turn off gate voltages are usually larger and require more current than turn on levels.
  • These devices, because of developments in IGCT technology are not very popular in the power electronics realm.
  • They are considered controlled, uni-polar and bi-polar voltage blocking
triac
TRIAC
  • The TRIAC is a device that is essentially an integrated pair of SCR connected in inverse-parallel on the same chip.[
slide10
Power Transistors
  • Power BJT
  • Power MOSFET
  • IGBT( Insulated Gate Bipolar Transistor )
advantages of pe

Advantages of PE

High Efficiency

High Reliability

Low Maintenance

Fast dynamic response ( ms, µs)

Small size

Low Cost (Mass Production)

slide26
FRIENDS
  • The word FRIENDS stands for Flexible Reliable and Intelligent Electrical eNergy Delivery Systems
  • Problem of Safety, Conservation and poor power quality can be solved by power electronics based FRIENDS devices
  • Main FRIENDS devices
      • Static Current Limiter (SCL)
      • Static Circuit Breaker (SCB)
      • Static Transfer Switch (STS)

26

slide30
ZnO Arrester

Iz

Ii

Let-Through Reactor

Inductor

Isw

If

Load Side

Supply Side

Back-to-back GTO Switch

GTO-based SCL topology

slide31
GTO and VCB based SCB topology

ZnO Arrester

Iz

Ib

High-Speed VCB

Isw

If

Load Side

Supply Side

Back-to-back GTO Switch

slide32
Thyristor based STS topology

Preferred

Source

Alternative

Source

ZnO

ZnO

Iz2

Iz1

Zf

Zf

Tan

Tpp

ian

Is2

ipp

Is1

iap

ipn

Tap

Tpn

FAULT

Ia

Sw2

Sw1

Critical

Load

slide33
Thyristor based STS topology

Preferred

Source

Alternative

Source

ZnO

ZnO

Iz2

Iz1

Zf

Zf

Tan

Tpp

ian

Is2

ipp

Is1

iap

ipn

Tap

Tpn

FAULT

Ia

Sw2

Sw1

Critical

Load

nampet national mission on power electronics technology
NaMPET: National Mission on Power Electronics Technology
  • NaMPET is a national mission programme launched in November 2004 by the Department of Information Technology(DIT) under Ministry of Communications & Information Technology, Government of India.
  • This five year programme is implemented through the Nodal Centre at the Centre for Development of Advanced Computing, Thiruvananthapuram.
  • Premier Academic Institutions in the country, Manufacturing Industries and User Industries of Power Electronics Systems participate in this programme.
  • A National Steering Committee comprising of eminent experts from different agencies and institutions in India guides the activities of NaMPET.
nampet vision
NaMPET: Vision
  • To provide the country with capability to become a dominant player in Power Electronics Technology at the international level.
  • This is a National level R&D Programme facilitating Research, Development, Deployment and Commercialization of Power Electronics Technology by enhancing the indigenous R&D expertise and infrastructure in the country with active participation from academic institutions and industries.
nampet focus areas

NaMPET: Focus Areas

Power Quality Improvement / Smart power for Digital Economy.

Electric traction / Electric & Hybrid Electric Vehicles / Automotive Electronics.

Distributed power generation / Renewable energy and Micro generator control.

Advanced Magnetics / Energy Storage Systems.

New topologies for Converter / Inverter applications.

New generation sensors for PE applications.

Modeling / Simulation packages.

Standard PE module with the state of the art developments

conclusions
Conclusions
  • The main contributions of the Power Electronics and FRIENDS Devices for Safety, conservation and improving the power quality can be summarized as follows:
  • Protection both appliance and life against Fault and unhealthy conditions of Electrical Energy System
  • Mitigation of voltage sags and swells
  • Power supply of different reliability
conclusions contd
Conclusions contd.
  • Interface to dispersed generation systems
  • Flexibility in Configuration of the System
  • Load Leveling and Energy Conservation
  • NaMPET: Vision
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