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Visar resultat 1 - 5 av 24 avhandlingar som matchar ovanstående sökkriterier.

1. 1. On harmonic distortion in power systems

   Författare :Johan Lundquist; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; converters; power sustem monitoring; harmonic distortion; losses; voltage notching; drives; harmonic filter; unbalance; harmonic propagation; resonance; rectifiers; power quality; active power;

   Sammanfattning : .... LÄS MER

3. 2. Three-phase unbalance of voltage dips

   Författare :Lidong Zhang; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; equipment immunity test; power quality; characterisation; power systems; field measurement; voltage dips sags ; symmetrical components;

   Sammanfattning : .... LÄS MER

4. 3. Estimation and Control of Resonant Systems with Stochastic Disturbances

   Författare :Peter Nauclér; Torsten Söderström; Anders Robertsson; Uppsala universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; vibration control; stochastic control; stochastic systems; feedforward control; Wiener filtering; Kalman filtering; wave separation; unbalance estimation; nonlinear regression; Automatic control; Reglerteknik;

   Sammanfattning : The presence of vibration is an important problem in many engineering applications. Various passive techniques have traditionally been used in order to reduce waves and vibrations, and their harmful effects. Passive techniques are, however, difficult to apply in the low frequency region. LÄS MER

5. 4. On Fluid Power Piston Pumps : With Special Reference to Flow Ripple Reduction

   Författare :Maria Pettersson; Linköpings universitet; []
   Nyckelord :;

   Sammanfattning : Among the major disadvantages of fluid power systems, leakage and an unpleasant sound level can be mentioned. Both drawbacks increase with increasing pressure ripple. Functional problems may be caused, even fatigue and breakdown. A main source of noise is hydrostatic pumps. LÄS MER

7. 5. On Transfer Functions for Power Quality Studies in Wind Power and Solar PV Plants

   Författare :Daphne Schwanz; Math Bollen; Anders Larsson; Jovica Milanovic; Luleå tekniska universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Electric Power Engineering; Elkraftteknik;

   Sammanfattning : As part of the decarbonisation of the energy system, wind and solar power are expected to play an important role. However, together with their growth, new challenges appear in the electric power system; this requires further research, development, and often studies before connection is possible. LÄS MER