AC Electrification System
![AC Electrification System](/content/dam/toshiba/migration/infrasolution/www/infrastructure/railway/assets/power-supply03.jpg)
Toshiba's electrical equipment is intended to supply highly reliable and stable AC power to the AC electric rolling stock. It consists mainly of AC power feeding equipment such as a large and medium capacity power feeding transformers that convert 3-phase alternating current into 2-phase alternating current, auto transformers, power compensators for power system stabilization due to three-phase unbalance compensation, voltage fluctuation suppression, AC circuit breakers intended for use at ultra-high voltages to special high voltages, lightning arresters, single phase AC power feeding circuit breakers, and switches which can withstand frequent use.
Benefits & Value
- ME distribution switchboard realizes higher reliability by plenary functions such as history management of accident and measurement data and maintenance monitoring as well as space-saving.
- High quality and rational design is realized by adopting insulation technologies and low-loss technologies based on numerical analysis for power transformers.
- Switches, which are used frequently for Shinkansen changeover sections, have been designed to withstand high voltage and ensure long operating life.
- The power compensator aims to stabilize the power system and provides reactive power compensation, voltage fluctuation suppression, unbalance compensation, etc. to meet its purpose.
Lineup
Feeding transformer
Converts three-phase AC into single-phase AC and supplies power to AC electrified rolling stock. Feeding transformers can be connected to the system according to the system voltage and application.
![Feeding transformer](/content/dam/toshiba/migration/infrasolution/www/infrastructure/railway/assets/ac_img_01_l_2.jpg)
Changeover switch
Enables frequent operation for instantaneous switching between power supplies of different phases in the switching section of high-speed trains. Changeover switches can also be mounted on gas-insulated switchgear (C-GIS for power lines).
![Changeover switch](/content/dam/toshiba/migration/infrasolution/www/infrastructure/railway/assets/ac_img_02_l_2.jpg)
Thyristor changeover switch
Stationary switches with a thyristor in the switching section. Due to the absence of moving parts, it realizes a longer life compared to the conventional mechanical changeover switches by using vacuum valves.
![Thyristor changeover switch](/content/dam/toshiba/migration/infrasolution/www/infrastructure/railway/assets/ac_img_03_l_2.jpg)
C-GIS for AC feeding system
Gas insulated switchgear for extra-high single-phase AC circuits unique to AC feeding system for railways. Compact size makes indoor installation possible.
![C-GIS for AC feeding system](/content/dam/toshiba/migration/infrasolution/www/infrastructure/railway/assets/ac_img_04_l_2.jpg)
C-GIS : Cubicle type Gas Insulated Switchgear
ME type control and relay panel
Monitoring, control, protection, and measurement system with multi-functionality and high reliability. Uses advanced digital processing technology centered on the latest micro electronics equipment.
![ME type control and relay panel](/content/dam/toshiba/migration/infrasolution/www/infrastructure/railway/assets/ac_img_05_l_2.jpg)
ME : Micro Electronics
Power compensator
Power compensators used for a variety of power system stabilization applications. Compensates for reactive power, three-phase unbalance, and power convergence.
![Power compensator](/content/dam/toshiba/migration/infrasolution/www/infrastructure/railway/assets/ac_img_06_l_2.jpg)