Search for dissertations about: "Modeling of distribution power system"

Showing result 1 - 5 of 70 swedish dissertations containing the words Modeling of distribution power system.

2. 1. Modeling, Control and Protection of Low-Voltage DC Microgrids

   Author : Daniel Salomonsson; Lennart Söder; Brian K. Johnsson; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; circuit transient analysis; dc power systems; dispersed storage and generation; load modeling; power conversion; power distribution control; power distribution faults; power distribution protection; power electronics; Electric power engineering; Elkraftteknik;

   Abstract : Current trends in electric power consumption indicate an increasing use of dc in end-user equipment, such as computers and other electronic appliances used in households and offices. With a dc power system, ac/dc conversion within these loads can be avoided, and losses reduced. READ MORE

4. 2. Planning Models for Single Wire Earth Return Power Distribution Networks

   Author : Geofrey Bakkabulindi; Lennart Söder; Mikael Amelin; Peiyuan Chen; KTH; []
   Keywords : Rural electrification; power distribution planning; Single Wire Earth Return; distribution power flow; power system modeling; SRA - Energy; SRA - Energi;

   Abstract : The high cost of grid extension to rural areas, often characterized by scattered communities with low load densities, requires the use of low cost electrification technologies to ensure economic viability. In Single Wire Earth Return (SWER) power distribution networks, the earth itself forms the current return path of the single phase system leading to significant cost savings on conductors, poles and poletop hardware compared to conventional systems. READ MORE

5. 3. Modelling and Evaluating Effect of Automation, Protection, and Control on Reliability of Power Distribution Systems

   Author : Ying He; KTH; []
   Keywords : electric distribution system; reliability assessment; protection; automation; control;

   Abstract : This thesis deals with modeling and evaluating effect ofautomation, protection, and control on reliability of powerdistribution systems. It presents the work and results of theproject ``Impacts of Distribution Automation on SystemReliability'' within the research program ``New DistributionSystems for Power Utilities'' performed at Competence Centre inElectric Power Engineering, KTH. READ MORE

6. 4. Large Scale Solar Power Integration in Distribution Grids : PV Modelling, Voltage Support and Aggregation Studies

   Author : Afshin Samadi; Lennart Söder; Olof Samuelsson; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Photovoltaic systems; PV system modelling; reactive power control; droop control; voltage sensitivity analysis; German Grid Codes; relative gain array RGA ; singular value decomposition SVD ; load modeling; system identification; Electrical Engineering; Elektro- och systemteknik;

   Abstract : Long term supporting schemes for photovoltaic (PV) system installation have led to accommodating large numbers of PV systems within load pockets in distribution grids. High penetrations of PV systems can cause new technical challenges, such as voltage rise due to reverse power flow during light load and high PV generation conditions. READ MORE

7. 5. Lifetime modeling and management of transformers

   Author : Johanna Rosenlind; Rajeev Thottappillill; Zhong Dong Wang; KTH; []
   Keywords : transformers; lifetime modeling; asset management; thermal modeling; lifetime estimation;

   Abstract : This work have studied and developed lifetime estimation methods for the power transformer and how these could be used for asset management purposes. It is researchperformed in the intersection of the fields of reliability theory, statistical analysis, and stochastic process theory applied to lifetime estimations and management of transformers. READ MORE