Comparative Analysis of Direct Quadrature (DQ) and Synchonverter Techniques for the Control of $3-\phi$ VSI in AC Micro-Grid

Rohit Kumar, M. Chaudhari, P. Chaturvedi, K. Sekhar
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引用次数: 4

Abstract

The modern power system is advancing towards an inverter dominant system from an alternator-based system. For effective operation, grid-tied micro-grids can be accomplished by employing an efficient inverter control technique that maintains desired performance at the Point of Common Coupling (PCC). The main focus of this paper is to study the comparative analysis of DQ and synchronverter control technique for inverter control. The mathematical modelling of these control techniques is presented. The Sine Pulse Width Modulation (SPWM) technique is used to control the gate pulse of Voltage Source Inverter (VSI). In this paper, the performance of both the control techniques under dynamic conditions i.e., variations in reference active $(\boldsymbol{P}_{\boldsymbol{ref}})$ and reactive $(\boldsymbol{Q}_{\boldsymbol{ref}})$ powers are examined. To verify the effectiveness of the control technique, simulations are carried out in MATLAB/Simulink environment. In synchronverter technique, the instantaneous grid voltages are used from the required mechanical input and induced emf directly act as modulating signals. The response of the synchronverter during the variation in power is smooth compared to DQ control.
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交流微电网3- VSI控制的直接正交(DQ)与同步技术的比较分析
现代电力系统正从以交流发电机为主的系统向逆变器为主的系统发展。为了有效运行,并网微电网可以通过采用有效的逆变器控制技术来实现,该技术在公共耦合点(PCC)保持所需的性能。本文的主要研究重点是对DQ和同步器控制技术进行逆变器控制的比较分析。给出了这些控制技术的数学模型。采用正弦脉宽调制(SPWM)技术控制电压源逆变器的栅极脉冲。本文研究了两种控制技术在动态条件下的性能,即参考主动$(\boldsymbol{P}_{\boldsymbol{ref}})$和被动$(\boldsymbol{Q}_{\boldsymbol{ref}})$幂的变化。为了验证控制技术的有效性,在MATLAB/Simulink环境下进行了仿真。在同步器技术中,从所需的机械输入和感应电动势直接作为调制信号使用瞬时电网电压。与DQ控制相比,同步器在功率变化过程中的响应是平滑的。
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