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In the Tokaido Shinkansen, the instantaneous feeding power of substations has increased because of the high-density train schedule and the improved acceleration performance of the rolling stock. If the load power of feeding substations increases any further, it will not be possible to maintain the feeder voltage when the power converter supplies only reactive power. In consideration of such a situation in the frequency conversion section, an electronic frequency converter that controls the ac voltage using a fixed power factor method was developed. The superiority of the proposed control method is confirmed with electromagnetic transient program calculations and field test results. The electronic frequency converter has been in operation since February 2009 with good performance, showing the success of the system development described in this paper.

In the Tokaido Shinkansen, we built new Electronic Frequency Converter (EFC) to replace Rotary Frequency Changer. The new EFC is individually operated in basic feeding pattern, and there appears the necessity for over-current tolerance in the converters. We describe the application of EFC to the Shinkansen railyard in this paper, showing the development of the control scheme which can control the over-current. At the same time, the new EFC has unique feature in connecting existing power supplies apart from the EFC, for covering various feeding situations. We also describe the method of interconnection.

In the Tokaido Shinkansen, the instantaneous feeding power of substations increases because of the high-density train schedule and the improved acceleration performance of the rolling stock. If the load power of feeding substations increases further, it will not be possible to maintain the feeder voltage if the power converter supplies only reactive power. Assuming such a situation in the frequency conversion section, we developed an electronic frequency converter that controls the AC voltage using a fixed power factor method. The electronic frequency converter is installed in the Numazu frequency conversion substation. Here we describe the superiority of AC voltage control using the fixed power factor method.