{"title":"中性点电流传感器三电平逆变器电流重构的CZV-PWM技术","authors":"Yongpeng Shen, Shuai Wang, Qian Wang, Nan Jin","doi":"10.1109/PSET56192.2022.10100488","DOIUrl":null,"url":null,"abstract":"A neutral current single sensor sampling composite zero vector pulse width modulation (CZV-PWM) phase current reconstruction strategy for three-level inverter is proposed in this paper. Firstly, the sampling principle of T-type three-level inverter with neutral current sensor is analyzed and the existence mechanism of unobservable region of the neutral current is investigated. Then, by compensating the observable voltage vector that does not meet the minimum sampling time requirement in different regions, and providing sampling windows by three end-to-end vectors, the CZV principle is proposed. Finally, experiments were performed and the results show that the current reconstruction error of the proposed method is lower than 2.5%, and the phase current THD is lower than 3.21%, which can provide accurate reconstructed phase current for the control system.","PeriodicalId":402897,"journal":{"name":"2022 IEEE International Conference on Power Systems and Electrical Technology (PSET)","volume":"95 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2022-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"A CZV-PWM Technique for Three-Level Inverter Current Reconstruction with Neutral Current Sensor\",\"authors\":\"Yongpeng Shen, Shuai Wang, Qian Wang, Nan Jin\",\"doi\":\"10.1109/PSET56192.2022.10100488\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"A neutral current single sensor sampling composite zero vector pulse width modulation (CZV-PWM) phase current reconstruction strategy for three-level inverter is proposed in this paper. Firstly, the sampling principle of T-type three-level inverter with neutral current sensor is analyzed and the existence mechanism of unobservable region of the neutral current is investigated. Then, by compensating the observable voltage vector that does not meet the minimum sampling time requirement in different regions, and providing sampling windows by three end-to-end vectors, the CZV principle is proposed. Finally, experiments were performed and the results show that the current reconstruction error of the proposed method is lower than 2.5%, and the phase current THD is lower than 3.21%, which can provide accurate reconstructed phase current for the control system.\",\"PeriodicalId\":402897,\"journal\":{\"name\":\"2022 IEEE International Conference on Power Systems and Electrical Technology (PSET)\",\"volume\":\"95 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2022-10-13\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"2022 IEEE International Conference on Power Systems and Electrical Technology (PSET)\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/PSET56192.2022.10100488\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"2022 IEEE International Conference on Power Systems and Electrical Technology (PSET)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/PSET56192.2022.10100488","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
A CZV-PWM Technique for Three-Level Inverter Current Reconstruction with Neutral Current Sensor
A neutral current single sensor sampling composite zero vector pulse width modulation (CZV-PWM) phase current reconstruction strategy for three-level inverter is proposed in this paper. Firstly, the sampling principle of T-type three-level inverter with neutral current sensor is analyzed and the existence mechanism of unobservable region of the neutral current is investigated. Then, by compensating the observable voltage vector that does not meet the minimum sampling time requirement in different regions, and providing sampling windows by three end-to-end vectors, the CZV principle is proposed. Finally, experiments were performed and the results show that the current reconstruction error of the proposed method is lower than 2.5%, and the phase current THD is lower than 3.21%, which can provide accurate reconstructed phase current for the control system.
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