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首页> 外文期刊>IEE Proceedings. Part B, Electric Power Applications >Optimal area control of AC railway systems via PWM traction drives
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Optimal area control of AC railway systems via PWM traction drives

机译：通过PWM牵引驱动器对交流铁路系统进行最佳区域控制

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摘要

The latest generation of AC-fed traction drives, employing high-speed switching devices, is able to control the reactive power drawn by each locomotive or train from the overhead line. If the conditions at each train could be fed back to a central control point, it would be possible for a centrally located controller to calculate optimal values for the reactive power in each drive and to send these commands back to the individual equipments. A scheme is proposed whereby the AC power flows are analysed in real time and the results used to optimise some particular system objective via control of the PWM equipments as mobile reactive power compensators. The system voltage profile can be improved and the overall power factor at the feeder substation made nearer to unity. Computational verification is presented with results obtained from a multi-train simulator with the power network optimisation operating in several test case scenarios. The test results are compared with those obtained without compensation and with classical trackside Var compensation methods. The scheme is shown to give the best improvement where an existing fleet of diode or thyristor equipments is partially replaced with PWM front-end equipments. From these results, the potential for PWM locomotives to improve overall system performance is clearly
机译：采用高速开关设备的最新一代AC馈电牵引驱动器，能够控制每个机车或火车从架空线汲取的无功功率。如果可以将每个列车的状态反馈给中央控制点，则位于中央的控制器可能会计算出每个驱动器中无功功率的最佳值，并将这些命令发送回各个设备。提出了一种方案，通过该方案实时分析交流功率流，并将结果用于通过控制作为移动无功功率补偿器的PWM设备来优化某些特定系统目标。可以改善系统电压曲线，并使馈线变电站的整体功率因数更接近于统一。通过多列仿真器获得的结果进行了计算验证，并且在多个测试案例场景中运行了电网优化。将测试结果与未经补偿和采用经典轨旁无功补偿方法获得的结果进行比较。在使用PWM前端设备部分替换现有二极管或晶闸管设备的情况下，该方案显示出最佳的改进。从这些结果来看，PWM机车改善整体系统性能的潜力显而易见

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