thyristor switching techniques pqs tsm[1]
TRANSCRIPT
Power Quality Solutions by EPCOS
Switching techniques TSM Thyristor switch
Power Quality Solutions @ India
Dynamic PFC
Dynamic PFC is Power factor correction featuring
a suitable fast power factor controller (BR6000T)
an electronic thyristor switching module (TSM)
to achieve:
Transient-free switching
Power Factor Correction with high switching frequency
Minimal reaction-time (< 20 ms)
No wear out
Enhancement of power quality
Motor start-up compensation
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Application example
Chinas largest shipyard –
7 Mvar
EPCOS dyn. PFC installed!Welding Cranes
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Dynamic PFC – Product Overview
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Dynamic PFC: design basics
TSM
Real time –Power factor controller
Ó
Thyristormodule
GR
ID
LOA
D
Super fast fuses
DischargeResistors
Reactors
CapacitorsReaction-time: < 20 ms
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Multi-stage DYNAMIC PFC network
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Switching basics
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Thyristor switch versus solid state relays
A solid state relays is no dynamic PFC solution!
Solid state are switching in voltage zero
Every time you have to discharge completely to voltage zero!
More time
Additional stress for the caps
In case of EPCOS TSM no completely discharge is needed!
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Soft switching without high inrush currents
Normal contactors
3500A inrush current!157 times nominal current!
Almost Zero delay time
ULTRA FAST switching
No inrush current!!
EPCOS TSM thyristor switch
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Fast electronically controlled self observing thyristor switch
Available for capacitive loads of up to 10, 25 & 50 kvar
Suitable for dynamic PFC-systems in 380 V and
440 V grids
Micro-processor controlled alignment to tuned or de-tuned capacitor branches (up to 14 %) for optimized
switching behaviour
No system perturbation due to switching operations (transients)
Switching without delay (real time PFC)
Long, useful and maintenance free service life
No noise emission during switching operation
Compact module ready for connection
Front plate with operation and error message display
Optimized heat sinks
Key component TSM-LC thristor switch
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6 or 12 fast transistor switching outputs for thyristors, 1 error message output
Display of various line parameters (V, I, F, Q, P, S…)
20 pre-programmed control series and manual control series editor
Intelligent switching
No-voltage turn-off
Manual / automatic operation
Complete menu-guided operation and display
Four-quadrant operation
Extensive programming options (fault detection and output, skipping outputs, fixed stages, etc.)
Key component BR6000T
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Consists of two single resistors, 22 kΩ
each
Standard resistors may only be used in systems without reactors!
The usage of fast discharge reactors is not possible!
Usable for thyristor switches LC25, LC50 and LC200
Characteristics:
Power: 2 x 50 W
Voltage: 1200 V
Key component discharge resistor EW22
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Summary dynamic PFC
Benefits of dynamic PFC Elimination of reactive power for slow and fast fluctuating loads
Investment reduction due to cutting-off of peak loads
(distribution equipment, cable cross section, etc) Power Quality: avoiding of transients & voltage drops
Fast switching without delay time for discharging (< 20 ms) thus
high duty cycles
Stabilizing of grid voltage (avoiding of voltage drops), therefore
improvement of production processes in terms of quality and time Increase of life time and long term performance of:
Switches (due to an unlimited number of thyristor switching operations)
Capacitors (due to smooth switching without transients)
Application: Automotive
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Application – Automotive: Benefits
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Load peaks eliminated
Better utilization of distribution equipment
Application – Automotive: Benefits
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Application: Motor startup
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Application - Motor Startup: Benefits
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Vol
tage
Cur
rent
Without
With
Without
With
Application - Motor Startup: Benefits
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Reduction of current peaks
Voltage stabilization
Reduced voltage drop
Stabilization of processes
Load peaks eliminated (e.g. peak demand meters)
Higher utilization of distribution equipment
Application - Motor Startup: Benefits
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Application: Welding
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7 V
22 V
Application - Welding: Benefits
w/o Dynamic PFC
With Dynamic PFC
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Voltage stabilization
Reduced voltage drop
Improved power reliability
Enhanced welding quality
Due to higher voltage shorter process times
Application - Welding: Benefits
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Application: Elevators
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Vol
tage
Cur
rent
Without
With
With
Without
Application - Elevators: Benefits
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Overall improved Power Quality
Peak demand elimination
Avoiding of flicker phenomena
Reduction of electricity bill
Avoiding PFC penalty
Application - Elevators: Benefits
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Application: Cranes
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Application - Cranes: Benefits
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Reduction of cable size down to the cranes
Reducing voltage drop on long cable distances
Enhanced utilization of distribution equipment
Sometimes reduced investment due to reduced
sizing of distribution equipment
Application - Cranes: Benefits
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Application: Wind energy
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THD-V in generalV
olta
geTH
DV
5th
Har
mon
ic
With Without
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THD-I in generalC
urre
ntTH
DI
5th
Har
mon
ic
With Without
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Power Quality Solutions
Peak performance through great partnerships
Thank you for your attention!