{"title":"AC/DC Fault-ride-through Control for Single-phase PV Inverter","authors":"M. Talha, S. Raihan, Nasrudin Abd. Rahim","doi":"10.1109/IEACon51066.2021.9654587","DOIUrl":null,"url":null,"abstract":"Single-phase low-power PV generators will be a dominant contributor to electricity in microgrids. However, PV-inverters are susceptible to input and output disturbances. On the one hand, the inverters disconnect entirely for a few minutes during grid sags. On the other hand, the inverter's power output drops during low solar insolence, leading to grid voltage flickers. Moreover, the conventional low voltage ride-through (LVRT) solutions can only handle fixed intensity sags, while the real grid environment may have milder to severe sags. This paper aims to present an LVRT strategy to handle all kinds of sags and compensate for rapid solar intermittencies while ensuring maximum power point tracking (MPPT) operation. A small energy storage buffer is coupled to the inverter's DC-link to compensate for AC and DC disturbances. During sags, the excess energy in the inverter's DC-link is absorbed by the buffer. In contrast, the buffer provides the deficit energy to maintain the constant power output in solar intermittencies. Experimental results show that the inverter can sustain variable intensity sags and compensate for rapid solar intermittencies. Moreover, the inverter always ensures MPPT operation and also provides reactive power during sags.","PeriodicalId":397039,"journal":{"name":"2021 IEEE Industrial Electronics and Applications Conference (IEACon)","volume":"46 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2021-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2021 IEEE Industrial Electronics and Applications Conference (IEACon)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/IEACon51066.2021.9654587","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
Single-phase low-power PV generators will be a dominant contributor to electricity in microgrids. However, PV-inverters are susceptible to input and output disturbances. On the one hand, the inverters disconnect entirely for a few minutes during grid sags. On the other hand, the inverter's power output drops during low solar insolence, leading to grid voltage flickers. Moreover, the conventional low voltage ride-through (LVRT) solutions can only handle fixed intensity sags, while the real grid environment may have milder to severe sags. This paper aims to present an LVRT strategy to handle all kinds of sags and compensate for rapid solar intermittencies while ensuring maximum power point tracking (MPPT) operation. A small energy storage buffer is coupled to the inverter's DC-link to compensate for AC and DC disturbances. During sags, the excess energy in the inverter's DC-link is absorbed by the buffer. In contrast, the buffer provides the deficit energy to maintain the constant power output in solar intermittencies. Experimental results show that the inverter can sustain variable intensity sags and compensate for rapid solar intermittencies. Moreover, the inverter always ensures MPPT operation and also provides reactive power during sags.