A NEW CASCADED TRANSFORMERLESS MULTILEVEL INVERTER TO CONNECT DG SOURCES TO NETWORK, WITH LOAD HARMONICS COMPENSATION CAPABILITY

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EBADI MAZDAK; JOORABIAN MAHMOUD; SHOKROLLAHI MOGHANI JAVAD

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Journal: COMPUTATIONAL INTELLIGENCE IN ELECTRICAL ENGINEERING (INTELLIGENT SYSTEMS IN ELECTRICAL ENGINEERING) Year:2015 | Volume:6 | Issue:3 Page(s): 1-16

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Title

A NEW CASCADED TRANSFORMERLESS MULTILEVEL INVERTER TO CONNECT DG SOURCES TO NETWORK, WITH LOAD HARMONICS COMPENSATION CAPABILITY

Author(s)

EBADI MAZDAK | JOORABIAN MAHMOUD | SHOKROLLAHI MOGHANI JAVAD | Issue Writer Certificate

Keywords

MULTILEVEL CASCADED INVERTERQ2

TRANSFORMERLESS INVERTERSQ2

FUZZY LOGIC CONTROLLERQ2

HARMONIC COMPENSATIONQ2

Abstract

A new cascaded multilevel transformerless inverter topology is introduced in this paper for connecting DG sources to power utility. Usual transformerless circuits are designed based on current injection capability, current harmonic minimization, and some physical constraints like isolation between DG and the network. The proposed circuit of this paper can compensate the current harmonic of the nonlinear load (as in APFs) and inject maximum possible active power as a DG source interface, simultaneously. A fuzzy controller is proposed to adjust the optimal set point of inverter between compensating mode and maximum active power injection mode. Proposed scheme is simulated in MATLAB/SIMULINK to evaluate the circuit performance both in the maximum active power injection mode, and HARMONIC COMPENSATION mode. Then a 1 kw single phase prototype of the circuit is used for experimental evaluation of the paper. Both simulative and experimental results prove that such a circuit can inject a well-controlled current with desired harmonics and THD, while having a smaller switching frequency and better efficiency, related to previous 3-phase inverter schemes in the literature.

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APA: Copy

EBADI, MAZDAK, JOORABIAN, MAHMOUD, & SHOKROLLAHI MOGHANI, JAVAD. (2015). A NEW CASCADED TRANSFORMERLESS MULTILEVEL INVERTER TO CONNECT DG SOURCES TO NETWORK, WITH LOAD HARMONICS COMPENSATION CAPABILITY. COMPUTATIONAL INTELLIGENCE IN ELECTRICAL ENGINEERING (INTELLIGENT SYSTEMS IN ELECTRICAL ENGINEERING), 6(3), 1-16. SID. https://sid.ir/paper/203071/en

Vancouver: Copy

EBADI MAZDAK, JOORABIAN MAHMOUD, SHOKROLLAHI MOGHANI JAVAD. A NEW CASCADED TRANSFORMERLESS MULTILEVEL INVERTER TO CONNECT DG SOURCES TO NETWORK, WITH LOAD HARMONICS COMPENSATION CAPABILITY. COMPUTATIONAL INTELLIGENCE IN ELECTRICAL ENGINEERING (INTELLIGENT SYSTEMS IN ELECTRICAL ENGINEERING)[Internet]. 2015;6(3):1-16. Available from: https://sid.ir/paper/203071/en

IEEE: Copy

MAZDAK EBADI, MAHMOUD JOORABIAN, and JAVAD SHOKROLLAHI MOGHANI, “A NEW CASCADED TRANSFORMERLESS MULTILEVEL INVERTER TO CONNECT DG SOURCES TO NETWORK, WITH LOAD HARMONICS COMPENSATION CAPABILITY,” COMPUTATIONAL INTELLIGENCE IN ELECTRICAL ENGINEERING (INTELLIGENT SYSTEMS IN ELECTRICAL ENGINEERING), vol. 6, no. 3, pp. 1–16, 2015, [Online]. Available: https://sid.ir/paper/203071/en

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