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Medium Frequency Soft Switching DC/D...

Li, Tao.

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Medium Frequency Soft Switching DC/DC Converter Based HVDC Transmission System for Offshore Wind Farms.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Medium Frequency Soft Switching DC/DC Converter Based HVDC Transmission System for Offshore Wind Farms./
Author:	Li, Tao.
Description:	62 p.
Notes:	Source: Masters Abstracts International, Volume: 53-04.
Contained By:	Masters Abstracts International53-04(E).
Subject:	Engineering, Electronics and Electrical. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=1561949
ISBN:	9781321079036

Medium Frequency Soft Switching DC/DC Converter Based HVDC Transmission System for Offshore Wind Farms.
Li, Tao.

Medium Frequency Soft Switching DC/DC Converter Based HVDC Transmission System for Offshore Wind Farms. - 62 p.

Source: Masters Abstracts International, Volume: 53-04.

Thesis (M.S.)--Rensselaer Polytechnic Institute, 2014.

This item must not be sold to any third party vendors.

As the most developed form of renewable energy, wind power continues to be a focus of academia and industry. Large-scale offshore wind farms are preferred for environment and economic consideration. High voltage DC (HVDC) transmission system has many advantages over high voltage AC (HVAC) for the growing distance from offshore wind farms to the shore (>100 km). As the essential part of HVDC system, DC/DC converter draws much research attention. Soft switching DC/DC converter with voltage-fed/current-fed topology is found most suitable for this application, for it can significantly reduce the switching loss at large operation range, allowing for higher operation frequency and smaller magnetic components.

ISBN: 9781321079036Subjects--Topical Terms:

626636
Engineering, Electronics and Electrical.

Medium Frequency Soft Switching DC/DC Converter Based HVDC Transmission System for Offshore Wind Farms.
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020 $a 9781321079036
035 $a (MiAaPQ)AAI1561949
035 $a AAI1561949
040 $a MiAaPQ $c MiAaPQ
100 1 $a Li, Tao. $3 1905598
245 1 0 $a Medium Frequency Soft Switching DC/DC Converter Based HVDC Transmission System for Offshore Wind Farms.
300 $a 62 p.
500 $a Source: Masters Abstracts International, Volume: 53-04.
500 $a Adviser: Leila Parsa.
502 $a Thesis (M.S.)--Rensselaer Polytechnic Institute, 2014.
506 $a This item must not be sold to any third party vendors.
520 $a As the most developed form of renewable energy, wind power continues to be a focus of academia and industry. Large-scale offshore wind farms are preferred for environment and economic consideration. High voltage DC (HVDC) transmission system has many advantages over high voltage AC (HVAC) for the growing distance from offshore wind farms to the shore (>100 km). As the essential part of HVDC system, DC/DC converter draws much research attention. Soft switching DC/DC converter with voltage-fed/current-fed topology is found most suitable for this application, for it can significantly reduce the switching loss at large operation range, allowing for higher operation frequency and smaller magnetic components.
520 $a A HVDC transmission system based on isolated medium frequency zero voltage zero current switching (ZVZCS) DC/DC converter is proposed for offshore wind farms in this thesis. In the proposed system topology, 40 wind generators are series connected and then attached to +/-500 kV HVDC lines. Turbines equipped with permanent magnet synchronous machine of 6 kV output are considered in this thesis. For the converter, all primary side switches are turned off with zero voltage and all secondary switches are turned on with zero current. Soft switching is achieved over the entire load range, via resonance between transformer leakage inductance and capacitance across primary switches.
520 $a Design example of a 2.5 MW, 5.6/25 kV converter is then presented. Steady state analysis and small signal model are developed. MatlabRTM routines are created to assist the calculation of lengths of operation modes and the choice of resonant parameters. With ZVZCS, the operation frequency is chosen as 2 kHz, which is much higher than traditional DC/DC converter of this power level, allowing for smaller transformer and inductor. Since transformer leakage inductance is utilized in the resonant circuit, its design procedure is elaborated as well. Finite element simulation aided iterative design ensures transformer has leakage inductance close enough to desire value. Controller design is completed and the closed loop system is simulated in PLECSRTM. Converters series connected at the output are also simulated to show scalability.
590 $a School code: 0185.
650 4 $a Engineering, Electronics and Electrical. $3 626636
650 4 $a Alternative Energy. $3 1035473
690 $a 0544
690 $a 0363
710 2 $a Rensselaer Polytechnic Institute. $b Electrical Engineering. $3 2098709
773 0 $t Masters Abstracts International $g 53-04(E).
790 $a 0185
791 $a M.S.
792 $a 2014
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=1561949