A single-phase voltage-source utility interface system for weak AC network applications
A single-phase voltage-source utility interface system for weak AC network applications
复制标题
适用于弱交流网络应用的单相电压源公用接口系统
DOI：
10.1109/apec.1994.316414
复制
发表时间：
1994
期刊：
影响因子：
--
通讯作者：
J. Quaicoe
中科院分区：
文献类型：
--
作者：
N. Abdel;J. Quaicoe
本文提出了一种新的控制策略，单相电压源电力公司接口系统。该方案采用单相电压源半桥逆变器和三阶T滤波器。首先研究了该方案的稳定性，使用状态空间平均技术和根轨迹法，以选择适当的反馈控制变量，产生稳定的反馈操作。其次，在稳定性分析的基础上，将电容电流和电容电压分别作为内、外反馈控制环，以实现该技术的稳定运行，并保证功率电路中负载电压和电流的正弦性。第三，计算机模拟结果的建议实用程序接口系统的电源电路的操作从“冷”启动到满负荷。结果表明，所提出的控制方案提供了改进的性能实用接口应用。它实现简单，能够在任何期望的功率因数下产生接近完美的正弦线电流和电压波形，具有适中的开关频率和合理的滤波器参数大小。此外，它与弱交流网络和大型交流网络都兼容。最后，实验验证所提出的方案在不同的负载功率因数的操作。<<ETX>>
This paper presents a novel control strategy for single-phase voltage-source electric utility interface systems. The proposed scheme employs a single-phase voltage-source half-bridge inverter and a third-order T-filter. The stability of the proposed scheme is first investigated, using the state-space averaging technique and root-locus method, in order to select appropriate feedback control variables that produce stable feedback operation. Secondly, based on the results of the stability analysis, both the capacitor current and voltage are employed in inner and outer feedback control loops respectively, in order to achieve stable operation of the proposed technique and to ensure sinusoidal load voltage and current in the power circuit. Thirdly, computer simulation results of the proposed utility interface system for operation of the power circuit from 'cold' start to full load is presented. It is shown that the proposed control scheme offers improved performance for utility interface applications. It is simple to implement, and capable of producing nearly perfect sinusoidal line current and voltage waveforms at any desired power factor with moderate switching frequency and reasonable size of filter parameters. Furthermore, it is compatible with both weak and large AC networks. Finally, experimental verification of the operation of the proposed scheme at various load power factors is provided.<<ETX>>