Essays about: "AC -DC converter"

Showing result 1 - 5 of 13 essays containing the words AC -DC converter.

1. 1. Closed-loop control and data- recording of a modular-multilevel converter (MMC)

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

   Author : Longgang Su; [2022]
   Keywords : Modular multilevel converters MMCs ; filed programmable gate array FPGA ; direct memory access DMA ; energy closed-loop control; data recording; ethernet.; Modulära multilevel-omvandlare MMC ; filed programmeable gate array FPGA ; direkt minnesåtkomst DMA ; energistyrning med sluten slinga; datainspelning; ethernet.;

   Abstract : Modular multilevel converters (MMCs) are the preferred converter solution in flexible ac transmission systems (FACTS) and high-voltage direct current (HVDC) applications. This is due to the high quality of the voltage and current signals, lower overall losses, and fewer problems with switching-related EMI. READ MORE

3. 2. Analysis and Performance Evaluation of a Three-phase Three-level Sparse Neutral Point Clamped Converter for Industrial Variable Speed Drives

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

   Author : Pengpeng Sun; [2022]
   Keywords : Sparse Neutral Point Clamped Converter; Industrial Variable Speed Drives; Silicon IGBT; Calorimetric Measurement; Reverse Recovery Energy; Sparse Neutral Point Clamped Converter; Industriella Varvtalsstyrda Motordrifter; Silicon IGBT; Kalorimetrisk Mätning; Energi för Återhämtningsprocess;

   Abstract : This thesis project focuses on the simulation, design, hardware realization, and performance evaluation of a Three-phase Three-level (3-L) Sparse Neutral Point Clamped Converter (SNPCC) for Industrial Variable Speed Drives (VSDs). The basic operating principle of the SNPCC is briefly described based on switching functions. READ MORE

4. 3. Transmission Systems for Grid Connection of Offshore Wind Farms : HVAC vs HVDC Breaking Point

   University essay from

   Author : Jesper Larsson; [2021]
   Keywords : Wind power; Offshore wind; Power systems; Transmission; HVAC; Reactive power; HVDC; VSC; MMC; Breaking point; LCOE; NPV;

   Abstract : Offshore wind is rapidly growing and optimised grid connections are crucial for its success. Generally, costs and losses are higher for HVDC at short distances due to the converters, while HVAC costs and losses increase more rapidly with distance due to the ac cables. READ MORE

5. 4. A Prefeasibility Analysis of a PV Mini Grid with Ice Plant on Buvu Island in Lake Victoria

   University essay from KTH/Skolan för industriell teknik och management (ITM)

   Author : Jonathan Daglish; [2019]
   Keywords : ;

   Abstract : Improving energy access through the provision of sustainable electrification is fundamental to reducing poverty and facilitating development in many areas of rural Sub Saharan Africa. The region currently suffers from severe energy inequality, with 81% of people relying on traditional forms of biomass for direct energy provision. READ MORE

6. 5. Maximum Inverter AC Current Prediction Based on Junction Temperature Calculation

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

   Author : Shuyu Ou; [2019]
   Keywords : IGBT; Inverter; Junction temperature; Current Limiter; IGBT; Växelriktare; Övergångstemperatur; Strömbegränsare;

   Abstract : Semiconductor devices are widely used in the automotive industry, and they are key components of the inverter and the converter in an electric vehicle. Thus, the concern of protecting the inverter and the converter from damaging operation has been raised. The junction temperature is one of the main considerations. READ MORE