Power electronics for fixed installation: one of the key technologies for HSR Tetsuo, UZUKA Director, Power Supply Technology, RTRI, Japan 8 th 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 Tetsuo, UZUKA - Director, Power Supply Division, RTRI, Japan - 8th July - Session 3: 2 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 Tetsuo, UZUKA - Director, Power Supply Division, RTRI, Japan - 8th July - Session 3: 3 Technology A - Systems - No.52
Voltage fluctuation and unbalance • 3 phase Voltage unbalance ratio < 3% in 2 hours (by Japanese government, IEC61000 also regulates) V cos q j sin q ) -I M ( cos q j sin q )} K V = P S {I T ( - - • T T M M • 3 phase Voltage fluctuation ratio (by Electric power company) in 2 minutes V { } D V (%) q p q p = I sin ( + / ) 3 + 3 I sin ( - / ) 6 UV M M T T P S V { } D V (%) q p q p = I sin ( - / ) 3 + 3 I sin ( + / ) 6 VW M M T T P S V D V (%) q = ( 2 I sin ) WU M M P S Tetsuo, UZUKA - Director, Power Supply Division, RTRI, Japan - 8th July - Session 3: 4 Technology A - Systems - No.52
RPC (Railway Static Power Conditioner) S 3 phase Grid Teaser R T INV Main Phase DC Capacitor Tetsuo, UZUKA - Director, Power Supply Division, RTRI, Japan - 8th July - Session 3: 5 Technology A - Systems - No.52
How to compensate with RPC Keep balance of active power of M/T phase Compensate reactive power in each phase I CT I CT V S V S I T I T PWM train Thrystor train powering Thyristor train powering I ST I SB powering I CM I SM PWM train I SM regenerating I CM V R V T V R V T Tetsuo, UZUKA - Director, Power Supply Division, RTRI, Japan - 8th July - Session 3: 6 Technology A - Systems - No.52
Thyristor trains can be compensated with thyristor SVC Tetsuo, UZUKA - Director, Power Supply Division, RTRI, Japan - 8th July - Session 3: 7 Technology A - Systems - No.52
PWM controlled train should be compensated with GTO/IGBT/IGCT Tohoku Shinkansen Changeover Switches AT Changeover Switches Feeding Transformer Cascade Transformer Circuit Breakers IGCT Control Room Inverters CT/VT Tetsuo, UZUKA - Director, Power Supply Division, RTRI, Japan - 8th July - Session 3: 8 Technology A - Systems - No.52
RPC Inverter Circuit (with IGCT ) Tetsuo, UZUKA - Director, Power Supply Division, RTRI, Japan - 8th July - Session 3: 9 Technology A - Systems - No.52
RPC Inverter Circuit (with IGBT ) Cascade Transformer Inverter Tetsuo, UZUKA - Director, Power Supply Division, RTRI, Japan - 8th July - Session 3: 10 Technology A - Systems - No.52
RPC with IGBT 11
Static Changeover Switch Thrystor 12kV 6kA 14 serial 60Hz 25kV Tokaido Shinkansen will introduce 33 post (66 set) Tetsuo, UZUKA - Director, Power Supply Division, RTRI, Japan - 8th July - Session 3: 12 Technology A - Systems - No.52
Static Frequency Converter for Tokaido Shinkansen (50Hz 3f /60Hz 3f) 13
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 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: 14 Technology A - Systems - No.52
...Thank you for your kind attention
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