Railway static power conditioner (RPC) inverter

AC power feeding system for railwaysRailway static power conditioner

'In AC feeding system, this product improves three-phase imbalance and voltage fluctuation at the power supply side by balancing at the load side.

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Product Features

'The AC feeding substations for Shinkansen, etc., converts three-phase power supply to two single phases by using the scott-connection transformer, etc. Therefore, if two single-phase loads are not balanced, three-phase imbalance and voltage fluctuation occur. The railway static power conditioner (RPC) is applied for measures against imbalance of power supply and voltage fluctuation, as well as enhancement of power quality including power factor improvement and harmonic restraint etc. The substation consists of multiple transformer , RPC, cooling unit and monitoring operation control panel.

  • 'Suppressing voltage imbalance and voltage fluctuation at the power receiving side
  • 'effective power Interchange and reactive power compensation
  • Power feeding voltage compensation
  • Energy saving

Applications and Solutions

The RPC interchanges effective power at the teaser and the main phase and  carries out reactive power compensation. Further, it equalizes effective power of windings at each phase of the Scott-connection transformer by rendering reactive power to zero. In so doing, it improves voltage fluctuation and three-phase current imbalance of the receiving power system.

Specifications

Item Example of delivery
Inverter capacity 4 to 20 MVA
ex. 4 MVA×2, 5 MVA×2 (one phase) X 2, 10 MVA X 2
AC supply voltage 900 - 1800V
DC voltage 1700 - 3400V
Multiplexing method Serial multistage
Single-phase bridge PWM control system
Cooling method Pure water circulation air-cooled system
Control mode RPC control : Interchanging effective power
SVC-Q control:  Reactive power compensation
SVC-V control:  Voltage compensation
  • * RPC: Railway Static Power Conditioner
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