Output quality improvement for single-phase inverter in V2G system

IF 16.4 1区 化学 Q1 CHEMISTRY, MULTIDISCIPLINARY Accounts of Chemical Research Pub Date : 2024-04-09 DOI:10.1049/pel2.12676
Yipei Wang, Ancheng Liu, A-Rim Kwak, Sung-Jun Park
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Abstract

In vehicle-to-grid (V2G) applications, a voltage source inverter (VSI) directly connects to a residential load or grid for DC/AC conversion and power flow control. In VSI, dead-time is employed to prevent the breakdown of switching devices, however, the introduction of dead-time leads to distortions of output voltage and current in both stand-alone and grid-tie modes. For the case of a power factor of 1, by analyzing the dead-time effect of digital-controlled double-frequency sinusoidal pulse width modulation, a compensation amount is proposed to introduce in the modulation signals, the value of which is half of the delay register that generates a dead-time of td. Moreover, considering the phase delay caused by hardware and software filtering in sampling, the grid-tie mode control strategy based on dead-time compensation is further proposed, which introduces the grid voltage as a feedforward signal. A 3.5 kW V2G experimental prototype is built and tested to verify the feasibility of the proposed strategies. The simulation and experimental results show that the proposed methods are effective for both modes, which improve the output distortion for different dead-time without additional hardware circuits.

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提高 V2G 系统中单相逆变器的输出质量
在车联网(V2G)应用中,电压源逆变器(VSI)直接连接到住宅负载或电网,进行直流/交流转换和功率流控制。VSI 采用死区时间来防止开关器件击穿,但死区时间的引入会导致独立模式和并网模式下的输出电压和电流失真。在功率因数为 1 的情况下,通过分析数字控制双频正弦脉宽调制的死区时间效应,提出了在调制信号中引入的补偿量,其值为产生死区时间 td 的延迟寄存器的一半。此外,考虑到采样时硬件和软件滤波造成的相位延迟,进一步提出了基于死区时间补偿的并网模式控制策略,该策略将电网电压作为前馈信号。建立并测试了一个 3.5 kW V2G 实验原型,以验证所提策略的可行性。仿真和实验结果表明,所提出的方法对两种模式均有效,无需额外的硬件电路即可改善不同死区时间的输出失真。
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来源期刊
Accounts of Chemical Research
Accounts of Chemical Research 化学-化学综合
CiteScore
31.40
自引率
1.10%
发文量
312
审稿时长
2 months
期刊介绍: Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.
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