Abstract
A new common ground transformerless inverter topology based on the switched-capacitor concept has been introduced in the proposed article. In the proposed design, ten switches, two capacitors, and a single DC source are used to enhance the output voltage to double that of the supply voltage by using a single DC source. The technique of common ground connection, in which the negative terminal of the photovoltaic modules is directly connected to the neutral point of the utility grid, is used to prevent leakage current. Furthermore, the topology description, the operating principle of the various states, and the computation of capacitance are all thoroughly investigated. To ensure that the proposed topology executes smoothly at all times, a level shift pulse width modulation technique is adopted. As an additional benefit of the suggested topology, detailed comparison evaluations are offered to highlight the advantages of the proposed topology. The proposed work has been carried out to establish the practicality of the proposed topology by modeling and conducting experimental tests on a five-level structure.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Sandeep N, Sathik MJ, Yaragatti UR, Krishnasamy V, Verma AK, Pota HR (2020) Common-ground-type five-level transformerless inverter topology with full DC-bus utilization. IEEE Trans Ind Appl 56(4):4071–4080. https://doi.org/10.1109/TIA.2020.2996152
Zhang F, Xie Y, Hu Y, Chen G, Wang X (2019) A hybrid boost–flyback/flyback microinverter for photovoltaic applications. IEEE Trans Ind Electron 67:308–318
XuHanWang Y, Habib S, Tang H (2019) A novel scalar PWM method to reduce leakage current in three-phase two-level transformerless grid-connected VSIs. IEEE Trans Ind Electron 67:3788–3797
Un E, Hava AM (2009) A near-state PWM method with reduced switching losses and reduced common-mode voltage for three-phase voltage source inverters. IEEE Trans Ind Appl 45(2):782–793
Yang T, HaoHe X, Wei ZR, Huang T, Zhang Y (2018) Hybrid modulation strategy to eliminate current distortion for PV grid-tied H6 inverter. Appl Sci 8:2578
Gupta AK, Joshi MS, Agarwal V (2020) Improved transformerless grid-tied PV inverter effectively operating at twice the switching frequency with constant CMV and reactive power capability. IEEE Trans Emerg Sel Topics Power Electron. https://doi.org/10.1109/JESTPE.2019.2943773
Sathik MJ, Tang Z, Yang Y, Vijayakumar K, Blaabjerg F (2019) A new 5-level ANPC switched-capacitor inverter topology for photovoltaic applications. In: IECON 2019—45th annual conference of the IEEE industrial electronics society
Zhang L, Sun K, Feng L, Wu H, Xing Y (2013) A family of neutral point clamped full-bridge topologies for transformerless photovoltaic grid-tied inverters. IEEE Trans Power Electron 28(2):730–739
Khoun Jahan H (2020) A new transformerless inverter with leakage current limiting and voltage boosting capabilities for grid-connected PV applications. IEEE Trans Ind Electron. https://doi.org/10.1109/TIE.2019.2960728
Wang H, Kou L, Liu Y, Sen PC (2017) A new six-switch five-level active neutral point clamped inverter for PV applications. IEEE Trans Power Electron 32(9):6700–6715
German Patent H5-Topology: DE 102004030912 B3 (2006)
German Patent HERIC-Topology: DE 10221592 A1 (2003)
Wensong Y et al (2010) High-efficiency inverter with H6-type configuration for photovoltaic non-isolated ac module applications. In: Applied power electronics conference and exposition (APEC), twenty-fifth annual IEEE, pp 1056–1061, 21–25
Islam M, Mekhilef S (2015) H6-type transformerless single-phase inverter for grid-tied photovoltaic system. IET Power Electron 8(4):636–644
Sabry AH, Mohammed ZM, Nordin FH, Ali NHN, Al-Ogaili AS (2019) Single-phase grid-tied transformerless inverter of zero leakage current for the PV system. IEEE Access 8:4361–4371
Grigoletto FB (2019) Five-level transformerless inverter for single-phase solar photovoltaic applications. IEEE J Emerg Sel Top Power Electron (Early Access) 5:1
Gu Y, Li W, Zhao Y, Yang B, Li C, He X (2013) Transformerless inverter with virtual dc bus concept for cost-effective grid-connected PV power systems. IEEE Trans Power Electron 28(2):793–805
Samizadeh M, Yang X, Karami B, Chen W, Houran MA, Abrishamifar A, Rahmati A (2018) A new topology of switched-capacitor multilevel inverter with elimination leakage current. In: International power electronics conference IPEC-Niigata2018-ECCE Asia)
Siwakoti YP, Blaabjerg F (2018) Common-ground-type transformerless inverters for single-phase solar photovoltaic systems. IEEE Trans Ind Electron 65(3):2100–2111
Gupta K, Ranjan A, Bhatnagar P, Sahu LK, Jain S (2016) Multilevel inverter topologies with reduced device count: a review. IEEE Trans Power Electron 31(1):135–151
Babaei E, Gowgani SS (2014) Hybrid multilevel inverter using switched capacitor units. IEEE Trans Ind Electron 61(9):4614–4621
Taghvaie A, Adabi J, Rezanejad M (2018) A self-balanced step-up multilevel inverter based on switched-capacitor structure. IEEE Trans Ind Electron 33:199–209
Bhatnagar P, Agrawal R, Dewangan NK, Jain SK, Gupta KK (2019) Switched capacitors 9-level module (SC9LM) with reduced device count for multilevel DC to AC power conversion. IET Electr Power Appl 13:1544–1552
Grigoletto FB (2020) Multilevel common-ground transformerless inverter for photovoltaic applications. IEEE J Emerg Sel Top Power Electron (Early Access) 56:1
Panda KP, Bana PR, Panda G (2020) A switched-capacitor self-balanced high-gain multilevel inverter employing a single DC source. IEEE Trans Circuits Syst II Express Briefs (Early Access). https://doi.org/10.1109/TCSII.2020.2975299
Singh N, Jain SK (2019) Investigation of three-level NPC-qZS inverterbased grid-connected renewable energy system. IET Power Electron. https://doi.org/10.1049/iet-pel.2019.0731
Author information
Authors and Affiliations
Corresponding author
Additional information
Publisher's Note
Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.
Rights and permissions
About this article
Cite this article
Jena, K., Panigrahi, C.K., Gupta, K.K. et al. A generalized transformerless switched-capacitor inverter for photovoltaic application. Electr Eng 104, 3435–3444 (2022). https://doi.org/10.1007/s00202-022-01496-6
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s00202-022-01496-6