technologies for HSR Tetsuo, UZUKA Director, Power Supply - - PowerPoint PPT Presentation

Power electronics for fixed installation: one of the key technologies for HSR

Tetsuo, UZUKA Director, Power Supply Technology, RTRI, Japan 8th July, Session 3: Technology A - Systems -

Content

• Part 1 Why power electronics needed for HSR ?
• Sparse power area between big cities -
• Part 2 How to compensate unbalance

and voltage fluctuation in 3 phase grid

• Part 3 Another Japanese experiences :

Frequency changer / Static changeover switch

• Part 4 Conclusion

2 Tetsuo, UZUKA - Director, Power Supply Division, RTRI, Japan - 8th July - Session 3: Technology A - Systems - No.52

Why power electronics needed for HSR ?

• Sparse power area between big cities
• High Speed Rail connects big cities
• HSR needs large power (10-30MVA) between cities: sparse power area
• Intervals between HSR substations: 40-70 km
• Power from weaker grid cause unbalance / voltage fluctuation in the grid
• Another loads would be affected by HSR running...
• Building sending line from stronger grid is expensive for cost and term
• Power electronics technology will:
• Compensates unbalance and voltage fluctuation in the grid
• Helps to receiving power from weaker grid more fast and economically

3 Tetsuo, UZUKA - Director, Power Supply Division, RTRI, Japan - 8th July - Session 3: Technology A - Systems - No.52

Voltage fluctuation and unbalance

DV (%)

UV

{ }

V P I I

S M M T T

= + +

• 3

3 6 sin( / ) sin( / ) q p q p D V (%)

VW

{ }

V P I I

S M M T T

=

• +

+ 3 3 6 sin( / ) sin( / ) q p q p D V (%)

WU

V P I

S M M

= 2 ( sin ) q

• 3 phase Voltage unbalance ratio < 3% in 2 hours

(by Japanese government, IEC61000 also regulates)

• 3 phase Voltage fluctuation ratio

(by Electric power company) in 2 minutes

M

jsin q )} V PS {IT( K V =

• M

cos q

• T

cos q

T

jsin q ) -IM(

4 Tetsuo, UZUKA - Director, Power Supply Division, RTRI, Japan - 8th July - Session 3: Technology A - Systems - No.52

3 phase Grid Teaser Main Phase R S T INV

5 Tetsuo, UZUKA - Director, Power Supply Division, RTRI, Japan - 8th July - Session 3: Technology A - Systems - No.52

RPC (Railway Static Power

Conditioner)

DC Capacitor

How to compensate with RPC

VR VS VT

Thyristor train powering

 Keep balance of active power of M/T phase  Compensate reactive power in each phase

PWM train powering

IT ICT ICM ISM IST VR VS VT

PWM train regenerating

IT ICT ICM ISM ISB

Thrystor train powering

6 Tetsuo, UZUKA - Director, Power Supply Division, RTRI, Japan - 8th July - Session 3: Technology A - Systems - No.52

7 Tetsuo, UZUKA - Director, Power Supply Division, RTRI, Japan - 8th July - Session 3: Technology A - Systems - No.52

Thyristor trains can be compensated with thyristor SVC

Control Room AT Tohoku Shinkansen Changeover Switches Feeding Transformer Circuit Breakers Changeover Switches CT/VT IGCT Inverters Cascade Transformer

8 Tetsuo, UZUKA - Director, Power Supply Division, RTRI, Japan - 8th July - Session 3: Technology A - Systems - No.52

PWM controlled train should be compensated with GTO/IGBT/IGCT

9 Tetsuo, UZUKA - Director, Power Supply Division, RTRI, Japan - 8th July - Session 3: Technology A - Systems - No.52

RPC Inverter Circuit (with IGCT)

Cascade Transformer Inverter

10 Tetsuo, UZUKA - Director, Power Supply Division, RTRI, Japan - 8th July - Session 3: Technology A - Systems - No.52

RPC Inverter Circuit (with IGBT)

RPC with IGBT

11

12 Tetsuo, UZUKA - Director, Power Supply Division, RTRI, Japan - 8th July - Session 3: Technology A - Systems - No.52

Thrystor 12kV 6kA 14 serial Tokaido Shinkansen will introduce 33 post (66 set) 60Hz 25kV

Static Changeover Switch

13

Static Frequency Converter for Tokaido Shinkansen (50Hz 3f /60Hz 3f)

Conclusion

• Power electronics helps to keep Power Quality of Grid
• Enable to receive from weaker grid
• Aged line, receiving from old power grid
• New line throughout sparse area
• Japanese Shinkansen installed over 500 MVA devices
• Fully frequency conversion 50/16.7Hz or 50Hz 3 phi / 50Hz is possible
• Careful protection coordination for short circuit phenomena required
• Economical study needed

14

Power electronics technique for fixed installations must be one of the key technology for HSR

Tetsuo, UZUKA - Director, Power Supply Division, RTRI, Japan - 8th July - Session 3: Technology A - Systems - No.52

...Thank you

for your kind attention