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首页> 外文期刊>Power Electronics, IET >Modified back-to-back current source converter and its application to wind energy conversion systems
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Modified back-to-back current source converter and its application to wind energy conversion systems

机译：改进的背靠背电流源转换器及其在风能转换系统中的应用

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摘要

The back-to-back (BTB) converter is used in power conversion applications such as machine drives, wind energy conversion systems (WECS), uninterruptible power supplies and high-voltage, direct current transmission systems. Various topologies have evolved around voltage source converters and current source converters (CSCs) in an attempt to meet various design and reliability constraints. This paper proposes a new CSC-based BTB converter suitable for WECS application. The proposed configuration addresses the main drawbacks of the conventional BTB CSCs, such as the over-voltage frequently experienced by switches during commutation. The inverter side converter has zero switching losses. The proposed WECS offers the following advantages: simple and easy control, reduced switching frequency and maximum power point tracking with controllable grid active and reactive power. A low-voltage ride-through (LVRT) solution is also provided in the proposed WECS. PSCAD/EMTDC simulation is used to assess the steady-state and dynamic behaviours of the proposed system under different operating conditions and during LVRT. Experimental results allow steady-state and dynamic behaviour assessment of the proposed system under different operating conditions.
机译：背靠背（BTB）转换器用于机器驱动器，风能转换系统（WECS），不间断电源和高压直流输电系统等电源转换应用中。为了满足各种设计和可靠性约束，电压源转换器和电流源转换器（CSC）周围已发展出各种拓扑。本文提出了一种适用于WECS应用的新型基于CSC的BTB转换器。提出的配置解决了常规BTB CSC的主要缺点，例如换向期间开关经常遇到的过电压。逆变器侧转换器的开关损耗为零。拟议中的WECS具有以下优点：简单易控制，降低开关频率和可控电网有功和无功功率跟踪最大功率点。提议的WECS中还提供了一种低压穿越（LVRT）解决方案。 PSCAD / EMTDC仿真用于评估所建议系统在不同运行条件下和LVRT期间的稳态和动态行为。实验结果允许在不同的操作条件下对所提出的系统进行稳态和动态行为评估。

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