Synchronization and Control

  • Slobodan N. Vukosavic
Chapter
Part of the Power Electronics and Power Systems book series (PEPS)

Abstract

The grids for transmission and distribution of electric energy have an ever-increasing share of static power converters. They include the source-side converters, the bus converters, and the load-side converters. Typical source-side converters are the inverters that collect the electric energy from the wind power plants or solar power plants, convert the energy into a set of three-phase voltages and currents, and inject the active and reactive power into the three-phase ac grid. The bus power converters are used for connections between the grids of different voltage levels, and they can be either ac/ac, dc/dc, or ac/dc. In a way, the bus converters tend to replace the traditional line-frequency power transformers. The load-side power converters are used as the power interface between the grid and the load. They convert the grid voltages and adjust the load voltages to suit the needs of the electric power application. With the advent of local accumulation and considering the regeneration needs of electrical drives, most load-side converters have to be bidirectional, capable of supplying electric energy into the grid during brief intervals of time. Therefore, the basic functionality of all the grid-side converters is similar. When interfacing the ac grids, the grid-side power converter has to provide the voltages and inject the currents that are in synchronism with the grid voltages. Therefore, it is necessary to provide the means for detecting the frequency and the phase of the grid ac voltages. Most common device in use is the phase-locked loop (PLL), often used in radio circuits.

References

  1. 1.
    Picher P, Bolduc L, Dutil A, Pham VQ (1997) Study of the acceptable DC current limit in core-form power transformers. IEEE Trans Power Deliv 12(1):257–265CrossRefGoogle Scholar
  2. 2.
    HV/LV distribution transformers, TRIHAL cast resin dry type transformers 160 to 2500 kVA (2005) France Transfo, Schneider Electric Industries SAS. http://mt.schneider-electric.be/
  3. 3.
    Cast resin dry type distribution transformers (2014) Lemi-Trafo Tranformers. www.lemi-trafo.comGoogle Scholar
  4. 4.
    Amorphous alloy transformers: underground amorphous alloy transformer (2011) China Power Equipment Inc. http://www.cet.sgcc.com.cn/
  5. 5.
    Mousavi SA, Engdahl G, Agheb E (2011) Investigation of GIC effects on core losses in single phase power transformers. Arch Elect Eng 60(1):35–47Google Scholar
  6. 6.
    Buticchi G, Lorenzani E, Franceschini G (2011) A DC offset current compensation strategy in transformerless grid-connected power converters. IEEE Trans Power Deliv 26(4):2743–2751CrossRefGoogle Scholar
  7. 7.
    Buticchi G, Lorenzani E (2013) Detection method of the dc bias in distribution power transformers. IEEE Trans Ind Electron 60(8):3539–3549CrossRefGoogle Scholar
  8. 8.
    Vukosavic SN, Peric LS (2015) High-precision sensing of DC bias in AC grids. IEEE Trans Power Deliv 30(3):1179–1186CrossRefGoogle Scholar
  9. 9.
    Vukosavic SN, Peric LS (2017) High-precision active suppression of DC bias in AC grids by grid-connected power converters. IEEE Trans Ind Appl 64(1):857–865Google Scholar

Copyright information

© Springer International Publishing AG, part of Springer Nature 2018

Authors and Affiliations

  • Slobodan N. Vukosavic
    • 1
    • 2
  1. 1.Department of Electrical EngineeringUniversity of BelgradeBelgradeSerbia
  2. 2.Serbian Academy of Sciences and ArtsBelgradeSerbia

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