Scheme for the Renovation of the Power Supply System on Line 1 and Line 2 of Beijing Subway
Sun Minggang Han Lianxiang(Beijing Urban Engineering Design and Research Institute, Beijing 100037)
The paper proposes a transitional scheme and an emergency scheme for the AC 10kV supply net, the DC 750V traction supply system and the 0.4kV lowvoltage system in the renovation of the transformer substations through the investigation into the old supply scheme and the state of the equipment of the existing supply system. It points out the difficulties in the renovation of the power supply system and the risks of the transitional scheme under the condition of operation without interruption. Finally, it puts forward an optimal scheme for the renovation of the power supply system on line 1 and line 2 of Beijing Subway.