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首页> 外文期刊>Electric power systems research >Voltage compensation in multi-grounded distribution network with a three-phase five-wire DSTATCOM
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Voltage compensation in multi-grounded distribution network with a three-phase five-wire DSTATCOM

机译：三相五线DSTATCOM的多接地配电网电压补偿

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摘要

This paper presents a three-phase static synchronous compensator with five legs to be connected to a multigrounded neutral distribution network. Several strategies are proposed in the literature to compensate for the imbalances in multi-grounded networks. Typically, three-phase static synchronous compensators with four legs can compensate for positive-, negative- and zero-sequence network voltages. However, they cannot simultaneously compensate also for the neutral voltage of multi-grounded network. Thus, the fifth-leg of the proposed compensator is controlled as a single-phase converter in order to compensate the neutral-voltage at the point of common coupling. Linearised mathematical models, in the synchronous reference frame, are developed and used to design the controllers used to compensate the network's neutral voltage and to regulate the current synthesized by the fifth-leg of the compensator. A multi-grounded network, derived from the IEEE NEV test feeder, is modelled in the PSCAD/EMTDC to investigate the performance of the proposed compensator. The results of the digital simulations demonstrate the effectiveness of the neutral voltage compensation strategy and validate the control loops designed for the three-phase five-wire static synchronous compensator.
机译：本文介绍了三相静态同步补偿器，有五条腿连接到多居中中性分配网络。在文献中提出了几种策略，以弥补多次网络中的不平衡。通常，具有四个腿的三相静态同步补偿器可以补偿正，负和零序列网络电压。然而，它们不能同时补偿多接地网络的中性电压。因此，所提出的补偿器的第五腿被控制为单相转换器，以便在共同耦合点处补偿中性电压。在同步参考帧中开发并用于设计用于补偿网络中性电压的控制器，并调节由补偿器的第五腿合成的电流的控制器。来自IEEE NEV测试馈线的多接地网络是在PSCAD / EMTDC中建模的，以研究所提出的补偿器的性能。数字模拟的结果证明了中性电压补偿策略的有效性，并验证了为三相五线静态同步补偿器设计的控制回路。

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