B2B-VSC 3-phase 4-leg output voltage stabilization in stand-alone microgrid

Pavel Pustokhin, A. Ziuzev, A. Kostylev
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引用次数: 1

Abstract

The article describes the structure of a mathematical model of an automatic control system (ACS) of a 2-level 4-wire voltage source inverter (VSI) as part of a back-to-back voltage source converter (B2B-VSC). The main task of the control is to maintain the set voltage at the output filter. Note that the power part of the VSI is made according to a four-wire circuit with eight transistors connected to the LC output filter. The VSI control system is represented in a Cartesian coordinate system d-q with an orientation along the vector of the output voltage, the position of which is set by the ACS. The control system consists of a channel for regulating the output current and VSI voltage. The proposed model allows to provide the required voltage on the load when working in an autonomous network. The installation of such a B2B-VSC will eliminate the dependence of the load voltage on the frequency of rotation of the generator and ensure the operation of the drive mechanism in optimal mode. In addition, the influence of the zero conductor reactor parameters on the duration of transients of the zero component and the overall effect on the total harmonic distortion coefficient (THD) of the current is considered.
B2B-VSC单机微电网三相四支腿输出稳压
本文描述了作为背靠背电压源变换器(B2B-VSC)的一部分的2电平4线电压源逆变器(VSI)的自动控制系统(ACS)的数学模型的结构。控制的主要任务是维持输出滤波器的设定电压。请注意,VSI的电源部分是根据四线制电路制作的,其中八个晶体管连接到LC输出滤波器。VSI控制系统在笛卡尔坐标系d-q中表示,其方向沿着输出电压的矢量,其位置由ACS设置。控制系统由调节输出电流和VSI电压的通道组成。所提出的模型允许在自治网络中工作时为负载提供所需的电压。安装这种B2B-VSC将消除负载电压对发电机旋转频率的依赖,确保驱动机构在最佳模式下运行。此外,还考虑了零导体电抗器参数对零分量瞬态持续时间的影响以及对电流总谐波失真系数(THD)的总体影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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