Why Low Voltage Direct Current Grids?

Although the use of DC in power systems was discarded years ago due to its inefficiency and non-economic feasibility, in the last decade the technological advance of power electronics has enabled DC to make its way back to the power system. This paper investigates the use of DC for electricity distribution at voltage levels below 1500V. A...

Powertrainontwerp voor een fuel cell raceauto

Formula Zero Delft is een raceteam dat sinds 2007 racevoertuigen met een fuel cell bouwt. In dat jaar nam de stichting deel aan de eerste competitie voor waterstof karts. In de twee jaar hierna heeft het team nog twee karts gebouwd waarna de overstap naar Formula Student auto's is gemaakt. Na twee jaar in de Formula Studentcompetitie gaat het...

Fault Current Control in the Transmission Network: An Electromagnetic Transient approach

Transmission System Operators (TSO's) are facing an increase of fault current levels in their networks due to the expansion of generation capacity. This thesis investigates three possible fault current limiting measures in the Dutch transmission grid which is operated and maintained by TenneT TSO. In order to evaluate the behavior of the fault...

Probabilistic Power Flow Analysis for a Given Network In Case of Wind Power Penetration

The installation of wind power generation in the Netherlands has been increased drastically over years and there are many going – on projects regarding harnessing wind energy by means of converting it into useful electrical power. One of the largest gas and electrical network operators, Stedin B.V. has decided to operate wind farm (s) in Goeree...

Modeling and investigation of the NorNed HVDC link with RTDS

Analysis of Protection Relay Malfunctioning in Medium Voltage Grids

The electrical power system generates and supplies electric energy to consumers and it must operate in a safe manner at all times. Despite its good performance, disturbances such as the occurrence of short circuits can always take place. Because short circuits cannot be prevented, the system must be able to recognize them and take corrective...

Modeling 150KV Indonesia Power System for Voltage Stability Studies

Electrical power system in the province of Lampung is connected to the province of Sumatera Selatan through a long transmission line. Since the generation capacity in Lampung is deficit, a large power is transferred from Sumatera Selatan. Due to the large power transferred, the disturbance occurred in the Lampung power system may lead to a...

Wind Speed Modeling

Implementation of Noord-Holland Grid in RTDS

The HCPS group of Electrical Power Engineering department has a Real-Time Digital Simulator (RTDS) for the study and analysis of power system phenomena. RTDS helps to perform real-time simulations that allow the user to interact with the grid model in real time. During this Master thesis work the existing Noord-Holland grid is implemented in...

Modeling of short circuit fault arc in 150 kV system and its influence on the performance of distance protection

The short circuit arc is the most dominant fault in the power system that leads to single phase to ground fault. South Sumatera 150 kV system in Indonesia consists of two different string insulator types in the transmission line, with and without arching horn. In this study, some fault situations in that system is reconstructed by using ATP Draw...

VSC-HVDC based Network Reinforcement

The recent development in semiconductor and control equipment has made HVDC transmission based on voltage-source converter (VSC-HVDC) feasible. VSC-HVDC has numerous advantages such as a controllable short-circuit current contribution, the rapid and independent control of active and reactive power, and good power quality. With these advantages...

Steady-state voltage profile and reactive power balance for EHV AC cable systems in the Randstad 380 project

In the current society, energy is getting more and more important and one of the most important energy carriers is electricity. TenneT TSO b.v, being the Dutch Transmission System Operator and the administrator of the national transmission grid is responsible not only for the continuity of the electricity supply, but also for the reliability and...

Dielectric stresses on 800 kV HVDC: Converter Transformers and Thyristor Valves

Investigation of dielectric stresses on the insulation system of 800 kV HVDC converter transformers and thyrisor valves by means of performing and analyzing RTDS simulations. Reviewing of current IEC standards for dielectric testing of these two component and assess if they are applicable for 800 kV equipment.

Hybrid Modeling for inter-turn voltage computation in layer type distribution transformers

The aim of this thesis is to calculate the primary inter-turn voltage distributions when the medium voltage single phase power transformer is subjected to a step voltage. This culculation is performed by considering the turns of the primary winding as transmission lines. In this thesis, the hybrid model, a combination of single transmission line...

Directional relay co-ordination in ungrounded radial distribution networks using a Real-Time Digital Simulator