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Design and Implementation of an 11-Level Inverter With FACTS Capability for Distributed Energy Systems

机译：具有分布式电源系统FACTS功能的11级逆变器的设计与实现

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摘要

In this paper, a new single-phase wind energy inverter (WEI) with flexible AC transmission system (FACTS) capability is presented. The proposed inverter is placed between the wind turbine and the grid, same as a regular WEI, and is able to regulate active and reactive power transferred to the grid. This inverter is equipped with distribution static synchronous compensators option in order to control the power factor (PF) of the local feeder lines. Using the proposed inverter for small-to-medium-size wind applications will eliminate the use of capacitor banks as well as FACTS devices to control the PF of the distribution lines. The goal of this paper is to introduce new ways to increase the penetration of renewable energy systems into the distribution systems. This will encourage the utilities and customers to act not only as a consumer, but also as a supplier of energy. Moreover, using the new types of converters with FACTS capabilities will significantly reduce the total cost of the renewable energy application. In this paper, modular multilevel converter is used as the desired topology to meet all the requirements of a single-phase system such as compatibility with IEEE standards, total harmonic distortion (THD), efficiency, and total cost of the system. The proposed control strategy regulates the active and reactive power using power angle and modulation index, respectively. The function of the proposed inverter is to transfer active power to the grid as well as keeping the PF of the local power lines constant at a target PF regardless of the incoming active power from the wind turbine. The simulations for an 11-level inverter have been done in MATLAB/Simulink. To validate the simulation results, a scaled prototype model of the proposed inverter has been built and tested.
机译：本文提出了一种具有灵活交流输电系统（FACTS）功能的新型单相风能逆变器（WEI）。拟议的逆变器与常规WEI一样，放置在风力涡轮机与电网之间，并且能够调节传输到电网的有功和无功功率。该逆变器配有配电静态同步补偿器选件，以控制本地馈线的功率因数（PF）。将拟议的逆变器用于中小型风能应用，将无需使用电容器组以及FACTS装置来控制配电线路的PF。本文的目的是介绍增加可再生能源系统渗透到配电系统中的新方法。这将鼓励公用事业和客户不仅充当消费者，而且充当能源供应商。此外，使用具有FACTS功能的新型转换器将大大降低可再生能源应用的总成本。在本文中，模块化多电平转换器用作所需的拓扑，以满足单相系统的所有要求，例如与IEEE标准的兼容性，总谐波失真（THD），效率和系统总成本。所提出的控制策略分别使用功率角和调制指数调节有功功率和无功功率。所提出的逆变器的功能是将有功功率传输到电网，并使本地电力线的PF保持恒定在目标PF上，而不管来自风力涡轮机的传入有功功率如何。在MATLAB / Simulink中完成了11级逆变器的仿真。为了验证仿真结果，已构建并测试了所提出逆变器的缩放原型模型。

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