A novel grid interface, optimized for utility-scale applications of photovoltaic, wind-electric, and fuel-cell systems

R. Naik, N. Mohan

Research output: Contribution to journalArticlepeer-review

60 Scopus citations

Abstract

Utility-interactive photovoltaic, wind-electric and fuel-cell systems are being planned at sufficiently large power levels. The technical and economic feasibility of such systems partially depends on the reliability, cost, and the efficiency of their grid interface. Here, a novel interface, which takes advantage of the system conditions in a utility-scale application is presented. The paper describes its basic principle of operation and characteristics. It is shown that the Total Harmonic Distortion in the line currents meets the 5 percent limit recommended by the IEEE 519-1992, with one-third the high frequency switch kVA ratings as compared to other topologies. Various options are discussed for utility-scale applications. Simulation results for a 25 kW unit are presented. The new conceptual circuit is validated by a prototype hardware design at 2.2 kW power level.

Original languageEnglish (US)
Pages (from-to)1920-1926
Number of pages7
JournalIEEE Transactions on Power Delivery
Volume10
Issue number4
DOIs
StatePublished - Oct 1995

Keywords

  • Grid interface
  • electric interface
  • interface for fuel cells
  • inverter with sinusoidal currents
  • photovoltaic interface
  • power electronics
  • utility-interactive
  • wind-

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