Increasing grid transmission capacity and power quality by a new solar inverter concept and inbuilt data communication

Peter Esslinger, Rolf Witzmann

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

5 Scopus citations

Abstract

The proportion of renewable energies in power generation has increased according to the political aims in recent years. In low-voltage grids, these are mostly decentralized renewable energy systems such as photovoltaic (PV) that are connected through the inverters to the grid. The temporary reversal of the power flow causes overvoltage problems. Consequently, regenerative sources need to be turned off temporarily or on the long term the grid infrastructure has to be extended by the utility company. The concept described in this paper uses reactive power which is generated by the solar power inverters to increase power capability and quality of the grid. Thus grid extension can be avoided in many cases or at least can be delayed. Voltage fluctuations due to varying power input, e.g. caused by passing clouds, can be reduced. Additionally, the inverters can be remotely controlled to compensate harmonic distortion and to improve phase voltage balance by feeding unsymmetrical currents into the three phases. Distributed data collection and central control is required for control of a distributed system of multiple solar inverters installed in a grid segment. The concept can be applied not only to PV systems; it is rather a basic technology which can be used in future grids with distributed generation and storage.

Original languageEnglish
Title of host publicationIEEE PES Innovative Smart Grid Technologies Conference Europe, ISGT Europe 2010
PublisherIEEE Computer Society
ISBN (Print)9781424485109
DOIs
StatePublished - 2010
Event2010 IEEE PES Innovative Smart Grid Technologies Conference Europe, ISGT Europe 2010 - Gothenburg, Sweden
Duration: 11 Oct 201013 Oct 2010

Publication series

NameIEEE PES Innovative Smart Grid Technologies Conference Europe, ISGT Europe

Conference

Conference2010 IEEE PES Innovative Smart Grid Technologies Conference Europe, ISGT Europe 2010
Country/TerritorySweden
CityGothenburg
Period11/10/1013/10/10

Keywords

  • Inverters
  • Low-voltage grid
  • Photovoltaic
  • Reactive power

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