In this paper, a generic framework for a rectifier to continuously take part in the regulation of grid voltage and frequency is proposed. It can automatically change the power consumed to support the grid, without affecting the normal operation of the load. Such a rectifier has a built-in storage port, in addition to the normal ac and dc ports. The flexibility required by the ac port to support the grid is provided by the storage port without affecting the dc port. The grid support of the ac port is achieved through the recently proposed universal droop controller (UDC). A dc-bus voltage controller cascaded to the UDC is proposed to regulate the dc-bus voltage of the storage port within a wide range so as to provide the flexibility needed, while the dc-port voltage is maintained constant. An illustrative example is presented with the recently proposed θ\theta-converter, which consists of three ports with only four switches. Experimental results are provided to verify the capability of the rectifier to regulate the grid voltage and frequency without affecting the load.

中文翻译：

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持续参与电网调节的下垂控制整流器


本文提出了一种整流器持续参与电网电压和频率调节的通用框架。它可以自动改变消耗的功率来支持电网，而不影响负载的正常运行。除了普通的交流和直流端口之外，此类整流器还具有内置存储端口。交流端口支持电网所需的灵活性由存储端口提供，而不影响直流端口。交流端口的电网支持是通过最近提出的通用下垂控制器（UDC）实现的。提出了级联到 UDC 的直流总线电压控制器，以在较宽的范围内调节存储端口的直流总线电压，从而提供所需的灵活性，同时保持直流端口电压恒定。最近提出的 θ\theta 转换器就是一个说明性的例子，它由三个端口组成，只有四个开关。实验结果验证了整流器在不影响负载的情况下调节电网电压和频率的能力。