teaching utility applications of power electronics in a first course on power systems l.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Teaching Utility Applications of Power Electronics in a First Course on Power Systems PowerPoint Presentation
Download Presentation
Teaching Utility Applications of Power Electronics in a First Course on Power Systems

Loading in 2 Seconds...

play fullscreen
1 / 22

Teaching Utility Applications of Power Electronics in a First Course on Power Systems - PowerPoint PPT Presentation


  • 519 Views
  • Uploaded on

Teaching Utility Applications of Power Electronics in a First Course on Power Systems. Outline. Importance of teaching power electronics in a power systems course Description of proposed approach consisting of four segments Functional aspects of power electronics

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Teaching Utility Applications of Power Electronics in a First Course on Power Systems' - JasminFlorian


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
outline
Outline
  • Importance of teaching power electronics in a power systems course
  • Description of proposed approach consisting of four segments
    • Functional aspects of power electronics
    • Power device capabilities and Power Electronic Structures
    • Role of power electronics in utility applications
    • Details of the power electronics structures
importance
Importance
  • Increasing applications of Power Electronic Equipment in Power Systems
    • Availability of high power semiconductor devices
    • Decentralized renewable energy generation sources
    • Increased power transfer with existing transmissionsystem
    • Effective control of power flow needed in a deregulated environment
    • Norms for Power quality

Future Power System

approach
Approach
  • Top Down approach consisting of four segments
    • Function of power electronics as an interface, and the listing of utility applications requiring power electronics interface (1 lecture)
    • Power device capabilities and the resulting structures of power electronic interfaces to exploit them (1 lecture)
    • Importance and the role of power electronic interfaces in various applications (2 lectures)
    • Discussion of power electronics interface in appropriate detail (3 lectures)
segment 1 function of power electronics in utility applications
Segment 1: Function of Power Electronics in Utility Applications
  • Enabling technology providing interface between two (ac/dc) electrical systems
  • E.g.
    • Interconnection of two asynchronous ac systems
    • dc to ac conversion is required to connect fuel cells or photovoltaics to the utility grid
segment 1 listing of power electronic applications
Segment 1: Listing of Power Electronic Applications
  • Distributed generation (DG)
    • Renewable resources (wind and photovoltaic)
    • Fuel cells and micro-turbines
    • Storage: batteries, super-conducting magnetic energy storage, flywheels
  • Power electronics loads: Adjustable speed drives
  • Power quality solutions
    • Dual feeders
    • Uninterruptible power supplies
    • Dynamic voltage restorers
  • Transmission and distribution (T&D)
    • High voltage dc (HVDC) and medium voltage dc
    • Flexible AC Transmission Systems (FACTS): Shunt and Series compensation, and the unified power flow controller
segment 2 power device capabilities resulting power electronic structures
Segment 2: Power Device Capabilities & Resulting Power Electronic Structures
  • Power Semiconductor Devices and their Capabilities
    • Polarity of voltage blocked and direction of current conduction
    • Switching speeds and power ratings
segment 2 structure of power electronic systems
Segment 2: Structure of Power Electronic Systems
  • Voltage-Link Systems
    • Transistors and diodes that can block voltage of only one polarity
  • Current-Link Systems
    • higher power bipolar voltage-blocking capabilities of thyristors
  • Solid State Switches
    • bidirectional voltage blockingand current conduction
segment 3 role of power electronics in important utility applications
Segment 3: Role of Power Electronics in Important Utility Applications
  • Distributed Generation (DG) ApplicationsPower electronic interface depends on the source characteristics

Wind Power Generation with Doubly Fed Induction Motors

Photo-voltaics Interface

(c)

segment 3 role of power electronics in important utility applications10
Segment 3: Role of Power Electronics in Important Utility Applications
  • Power Electronic Loads: Adjustable Speed Drives

(c)

segment 3 role of power electronics in important utility applications11

Dynamic Voltage Restorers (DVR)

Dual Feeders

Uninterruptible Power Supplies

Segment 3: Role of Power Electronics in Important Utility Applications
  • Power Quality Solutions for
    • voltage distortion
    • unbalances
    • voltage sags and swells
    • power outages

(c)

segment 3 role of power electronics in important utility applications12

HVDC

MVDC

Segment 3: Role of Power Electronics in Important Utility Applications
  • Transmission and Distribution: DC Transmission
    • most flexible solution for connection of two ac systems
segment 3 role of power electronics in important utility applications13

Series Compensation

Shunt Compensation

Shunt and Series Compensation

Segment 3: Role of Power Electronics in Important Utility Applications
  • Transmission and Distribution: Flexible AC Transmission Systems (FACTS)
segment 4 discussion of power electronics interface
Segment 4: Discussion of Power Electronics Interface
  • Fundamental concepts for understanding the operation of the power electronic structures
    • voltage-link systems
    • current link systems
    • solid state switches
voltage link systems

Voltage

port

Current

port

Voltage-Link Systems
  • Unifying approach: Power-Pole Building Block
    • building block of all voltage-link systems
voltage link systems16

Voltage

port

Current

port

Voltage-Link Systems
  • Power conversion using Pulse Width Modulation (PWM)
    • Power reversal with reversal of current direction
    • Averaged conversion
voltage link systems17

Voltage

port

Current

port

Voltage-Link Systems
  • Averaged Representation of Power Pole
    • Average quantities are of main interest
voltage link systems18
Voltage-Link Systems
  • Synthesis of AC voltages
    • voltage to be synthesized
    • duty ratio needed
    • dc side current
voltage link systems19
Voltage-Link Systems
  • Implementation of bi-positional switch

(d)

current link systems
Current-Link Systems
  • Exclusively thyristor based
    • One of (T1, T2, T3) and (T2, T4, T6)conduct at a time
    • Average dc voltage controlled by ‘firing angle’
    • Power flow reversed by reversing voltage polarity

(d)

solid state switch
Solid State Switch
  • Can conduct current in both directions
  • Turn-on or off in an ac circuit in one-half of a line-frequency cycle

(d)

conclusion
Conclusion
  • Teaching utility applications of power electronics in a power systems course is very important
  • A top down approach, starting with functional aspects and going to implementation details is suggested
  • Topics outlined in the four segment proposed structure will introduce students to future practices and technologies in power engineering
  • The proposed structure may be adapted based on individual preferences