Essays about: "winding insulation"

Showing result 1 - 5 of 13 essays containing the words winding insulation.

  1. 1. Allowing more solar power connected to the grid, using thermal and ageing models of distribution transformers.

    University essay from Högskolan Dalarna/Institutionen för information och teknik

    Author : Amena Khatun; [2021]
    Keywords : electric power distribution; solar power; renewable-electricity production; hosting capacity; distribution transformers; dynamic thermal rating; component ageing; component overloading.;

    Abstract : Increasing amounts of solar power connected to the low-voltage network will adversely affect the performance of the network. The two impacts that will most often set the limit are overvoltage with the customers and overloading the distribution transformer. READ MORE

  3. 2. Minimizing Transformer No-Load Losses at Hydropower Plants : A Study of Effects from Transformer Switch-Off During Stand-by Operation

    University essay from Uppsala universitet/Institutionen för elektroteknik

    Author : Elin Luedtke; [2021]
    Keywords : step-up transformer; transformer switch-off; stand-by operation; idle operation; transformer winding; inrush current; fatigue stress; fatigue failure; S-N curve; transformer thermal cycling; thermal time constant; saving potential in hydropower; hydropower plant;

    Abstract : Hydropower is the most important power balancing resource in the Swedish electrical power system, regulating the power supply to match the load. Consequently, several hydropower plants have periods of stand-by operation where the power production is absent but where several devices within a plant are still active. READ MORE

  4. 3. Influence of structural and materials properties on the flexural strength of laminated high-density cellulose fiberboards

    University essay from KTH/Hållfasthetslära

    Author : Ola Serck; [2021]
    Keywords : ;

    Abstract : Laminated pressboard is a structural electrical insulation material used in power transformers. Typical applications are areas in the power transformers where high mechanical forces are present such as pressrings or winding tables and cleats which support the electrical cables connecting the transformer windings to tap-changes and bushings. READ MORE

  5. 4. Dielectric Response and Partial Discharge Characteristics of Stator Winding Insulation System with SiC Stress Grading

    University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Author : Amar Abideen; [2020]
    Keywords : Stator Insulation; Dielectric Frequency Response; Polarization Depolarization Current; Insulation Modelling; FEM simulation;

    Abstract : The typical construction of a stator coil includes the use of end corona protection (ECP)coating, which is made of semi-conductive materials like silicon carbide (SiC). Thepurpose of ECP is to smooth the electric stress distribution near the slot exit, limitingthe electric field and partial discharge (PD) activity within the insulation system. READ MORE

  6. 5. Real-time detection of stator resistance unbalances in three phase drives

    University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Author : Bhanu Pratap Singh; [2020]
    Keywords : DC voltage injection; Fault detection; Field-Oriented Control; Induction machine; Inter-Turn Short Circuit; Short circuit; Sequence; Stator resistance unbalance; Symmetrical components; likspänningsinjektion; feldetektering; fält orienterad reglering; induktionsmaskin; InterTurn Short Circuit; kortslut; sekvenser; statormotstånd obalans; symmetriska komponenter;

    Abstract : An estimated 30% of the faults in Induction Machine (IM) are related to its stator. These faults are mostly in the form of an Inter-Turn Short Circuit (ITSC) fault i.e., when two winding inside the stator of IM are shorted due to insulation failure. READ MORE