摘要
当电流控制的delta调制控制策略应用于UPS逆变器控制时,存在负载变动引起逆变器输出电压幅值不稳定、负载为非线性时逆变器输出电压波形畸变严重等问题。为克服这些不利,该文提出一种电压控制的Delta调制的逆变器闭环控制策略:首先建立了系统控制结构并详细叙述了系统运行原理,然后根据控制结构建立了系统的解析模型,导出了影响系统性能的主要参数。基于离散傅立叶变换和MATLAB仿真,得出并分析了系统主要参数变动影响逆变器性能的各种特性曲线,以指导系统的工程设计。实验结果证明,电压控制的Delta调制逆变器控制策略具有抗扰动能力强、输出电胜波形畸变小、实现简单等优点,适合应用于UPS逆变器。
When current-controlled delta modulated control scheme is applied to UPS inverter, the output voltage amplitude is unstable in case of load variation and the output voltage waveform is heavily distorted by nonlinear load. To overcome the.se disadvantages, a novel voltage-controlled delta-modulated inverter control scheme is proposed in this paper. Firstly the control structure is set up and the operation principle of the proposed system is described in detail. Then an analytical model of the system is derived, from which the parameters affecting system performances emerge. Various kinds of performance curves are obtained and analyzed based on discrete Fourier transform (DFT) and MATLAB simulation. These performance curves can be used as the guideline of engineering design. Experiment results validate that the proposed voltage-controlled delta modulated control scheme has the merits of powerful ability to reject disturbances, slight inverter output: voltage waveform distortion, and very simple implementation.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2004年第9期182-187,共6页
Proceedings of the CSEE
