首页> 外文期刊>Industry Applications, IEEE Transactions on >A Scalar Resonant-Filter-Bank-Based Output-Voltage Control Method and a Scalar Minimum-Switching-Loss Discontinuous PWM Method for the Four-Leg-Inverter-Based Three-Phase Four-Wire Power Supply
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A Scalar Resonant-Filter-Bank-Based Output-Voltage Control Method and a Scalar Minimum-Switching-Loss Discontinuous PWM Method for the Four-Leg-Inverter-Based Three-Phase Four-Wire Power Supply

机译:基于四脚逆变器的三相四线电源的基于标量谐振滤波器组的输出电压控制方法和标量最小开关损耗间断PWM方法

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摘要

An all-scalar-control and pulsewidth-modulation (PWM) approach for the four-leg-inverter (FLI)-based three-phase transformerless four-wire power supply (PS) is proposed. The output voltage of each phase is controlled independently, and its controller is formed by a stationary-frame resonant-filter bank accompanied with proportional-control and output-capacitor current-based active-damping loops. The simple and easy to implement scalar-control method exhibits superior overall steady-state and dynamic performance in the PS applications involving loads with high crest factor and/or significant load imbalance. Utilizing the inverter zero-state partitioning, a generalized form of scalar PWM for the FLI is developed. A novel minimum loss discontinuous PWM method, which provides minimum switching losses under all loading conditions (including load imbalance), is derived. This simple scalar method provides superior performance, and unlike the vector methods, it is easy to implement. The controller and modulator design and implementation details for the system are given. Linear and nonlinear loads for balanced and imbalanced load operating conditions are considered. The scalar-control and PWM methods are proven by means of theory, simulations, and thorough laboratory experiments of a 5-kVA PS.
机译:提出了一种基于四脚逆变器(FLI)的三相无变压器四线电源(PS)的全标量控制和脉宽调制(PWM)方法。每相的输出电压是独立控制的,其控制器由固定帧谐振滤波器组以及比例控制和基于输出电容器电流的有源阻尼环路组成。在涉及具有高波峰因数和/或明显的负载不平衡的负载的PS应用中,简单且易于实现的标量控制方法表现出卓越的整体稳态和动态性能。利用逆变器的零状态分配,开发了用于FLI的标量PWM的通用形式。推导了一种新颖的最小损耗不连续PWM方法,该方法可在所有负载条件下(包括负载不平衡)提供最小的开关损耗。这种简单的标量方法提供了卓越的性能,并且与矢量方法不同,它易于实现。给出了系统的控制器和调制器设计以及实现细节。考虑了平衡和不平衡负载运行条件下的线性和非线性负载。标量控制和PWM方法通过5 kVA PS的理论,仿真和全面的实验室实验得到证明。

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