Voltage and current THD in microgrid with different DG unit and load configurations

@inproceedings{Laaksonen2008VoltageAC,
  title={Voltage and current THD in microgrid with different DG unit and load configurations},
  author={Hannu Laaksonen and Kimmo Kauhaniemi},
  year={2008}
}
After microgrid transition from the normal operation to the islanded operation the system impedance changes considerably and it affects on the harmonic voltages of the microgrid. In this paper the voltage and current THD before and after islanding are studied with different microgrid configurations. Simulations are also made by applying negative sequence filtering in control system of converters to reduce the voltage and current THD in microgrid during unsymmetrical load. Based on the studies… 

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References

SHOWING 1-9 OF 9 REFERENCES
Sensitivity analysis of frequency and voltage stability in islanded microgrid
This paper studies the voltage and frequency stabil ity of an islanded microgrid and the sensitivity of these qua ntities to certain changes in system configuration. In convent ional power systems
Fault type and location detection in islanded microgrid with different control methods based converters
In this paper the fault type and location detection in an islanded low voltage (LV) distribution network base d microgrid with converters applying different contro l methods is studied. In the future
A new phase detecting method for power conversion systems considering distorted conditions in power system
  • Sang-Joon Lee, Jun-Koo Kang, S. Sul
  • Engineering
    Conference Record of the 1999 IEEE Industry Applications Conference. Thirty-Forth IAS Annual Meeting (Cat. No.99CH36370)
  • 1999
TLDR
A new phase detecting method is proposed for PWM rectifiers and active filters considering distorted utility conditions that does not cause harmonics in the reference signal by adequately eliminating unbalance components and high-order harmonic terms in the utility voltage.
Electrical Power Systems Quality, Second Edition, McGraw-Hill
  • Beaty,
  • 2002
New Concept for Power Quality Management in Microgrid with Energy Storage Based Power Quality Compensator
  • Kauhaniemi,
  • 2008
S-K
  • Sul
  • 1999
S
  • Santoso, H.W. Beaty
  • 2002
K
  • Kauhaniemi
  • 2007
Sul, 1999, "A New Pha se Detecting Method for Power Conversion Systems Considering Distorted Conditions in Power System
  • IEEE IAS Annual Meeting,
  • 1999