Deadbeat-based PI controller for stand-alone single-phase voltage source inverter using battery cell as primary sources

Tiang Tow Leong, D. Ishak
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引用次数: 14

Abstract

This paper presents a deadbeat-based proportional-integral (PI) controller for stand-alone single-phase voltage source inverter using battery cell as primary energy sources. The system consists of the lead acid battery, third order Butterworth low pass DC filter and AC filter, H-bridge inverter, step-up transformer, and also a variety of loads as well as its sinusoidal pulse-width-modulation (SPWM) deadbeat-based PI controller. In this paper, two simulation case studies have been carried out which are the abrupt load changes from 400W resistive load to 500W resistive load and also from 400W resistive load to inductive load of 500W 0.85 power factor lagging. From the simulation results for both cases, the state-of-charge (SOC) battery is decreasing to supply power to the different type of loads, yet the battery voltage remains constant at about 36V and also the battery current exhibits smooth ripple despite current spikes produced by the H-bridge inverter so as to prolong the lifespan of the battery. It shows that the DC filter performs satisfactorily to isolate the current spikes generated by the SPWM controller and H-bridge inverter. Besides that, even though the load varies for both cases, the sinusoidal inverter output voltage can be tracked and maintained at 230Vrms with 50Hz frequency within few cycles from the instant the load changes as well as low THDv content of 1.53% and 2.78% respectively. This indicates that the controller proves its robustness and stiffness characteristic in maintaining the output load voltage at desired value to supply the power for variety of loads with minimum THDv.
基于无死拍的独立单相电压源逆变器的PI控制器
本文提出了一种基于死拍的比例积分(PI)控制器,用于以蓄电池为一次电源的独立单相电压源逆变器。该系统由铅酸蓄电池、三阶巴特沃斯低通直流滤波器和交流滤波器、h桥逆变器、升压变压器以及各种负载及其正弦脉宽调制(SPWM)无差拍PI控制器组成。本文进行了从400W阻性负载到500W阻性负载的突然变化和从400W阻性负载到500W 0.85功率因数滞后的感性负载的两个仿真案例研究。从这两种情况的模拟结果来看,荷电状态(SOC)电池正在减少以向不同类型的负载供电,但电池电压保持恒定在36V左右,并且尽管h桥逆变器产生电流尖峰,电池电流仍表现出平滑的纹波,从而延长了电池的寿命。结果表明,该直流滤波器能很好地隔离SPWM控制器和h桥逆变器产生的电流尖峰。此外,在两种情况下,即使负载变化,正弦逆变器的输出电压也可以在负载变化瞬间的几个周期内跟踪并保持在50Hz频率下的230Vrms, THDv含量分别为1.53%和2.78%。这表明该控制器在保持输出负载电压在期望值上,以最小的THDv为各种负载供电方面证明了其鲁棒性和刚度特性。
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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