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首页> 外文会议>Power Electronics, Machines and Drives (PEMD 2012), 6th IET International Conference on >Examination of new current control methods for modern PWM controlled AC electric locomotives
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Examination of new current control methods for modern PWM controlled AC electric locomotives

机译：检验现代PWM控制的交流电力机车的新型电流控制方法

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摘要

A railway electrification system supplies electrical energy to railway locomotives and multiple units. There are several different electrification systems in use throughout the world. The single-phase AC network systems are widespread (25 kV 50 Hz or 15 kV 16 2/3 Hz). The Hungarian system is 25kV 50 Hz AC. This article is just dealing with the AC network supplied locomotives. Nowadays in our country the series wound DC traction motor driven locomotives are still widely used. These vehicles are equipped with diode or thyristor rectifier circuits that inject harmonics into the AC line and distort the line voltage. In our work we examined and compared current control methods that can be achieved by "network-friendly" locomotives connected to distorted line. We worked out a new current control strategy that possesses several advantages. The modern locomotives endeavour to consume sinusoidal current from the AC network, in phase with the network voltage fundamental. In generator mode these endeavour to supply back to the grid sinusoidal current in antiphase to the voltage fundamental. We compared current control methods with this "common" strategy. One of them can reduce the consumed root mean square (RMS) or fundamental current of a distorted line connected modern locomotive in motor mode. Other one can increase the generated RMS and fundamental current in generator mode. With these strategies the harmonic currents can be used for active power. Moreover it turned out that the harmonic content of the network can be reduced by the "new" strategies. For the study, we built a test system. We can model the line-side converter of a modern locomotive DC-link frequency converter with the system. A common solution in locomotives is when several line-side converters feed two DC-links. In the test system we modelled these with one converter, while the motor-side voltage source inverters and the electric traction motors were taken in- o account as a controllable current source DC-link.
机译：铁路电气化系统为铁路机车和多个单元提供电能。全世界使用着几种不同的电气化系统。单相交流网络系统很普遍（25 kV 50 Hz或15 kV 16 2/3 Hz）。匈牙利系统为25kV 50 Hz AC。本文仅涉及AC网络提供的机车。如今在我国，绕线式直流牵引电动机驱动的机车仍被广泛使用。这些车辆配备了二极管或晶闸管整流器电路，这些电路将谐波注入到交流线路中并使线路电压失真。在我们的工作中，我们研究并比较了电流控制方法，这些方法可以通过连接到变形线路的“网络友好型”机车实现。我们制定了一种具有多种优势的新的电流控制策略。现代机车努力消耗与电网电压基波同相的交流网络正弦电流。在发电机模式下，这些努力将与电压基波反相的正弦电流提供回电网。我们将当前的控制方法与这种“通用”策略进行了比较。其中之一可以降低电动机模式下连接的现代机车变形线路的消耗的均方根（RMS）或基波电流。另一种可以在发电机模式下增加产生的RMS和基本电流。通过这些策略，谐波电流可用于有功功率。此外，事实证明，通过“新”策略可以减少网络的谐波含量。为了进行研究，我们构建了一个测试系统。我们可以使用该系统对现代机车直流链路变频器的线路侧转换器进行建模。机车的一种常见解决方案是当几个线路侧的转换器馈入两个直流母线时。在测试系统中，我们使用一个转换器对它们进行了建模，而电机侧的电压源逆变器和电力牵引电机则被视为可控电流源直流母线。

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