Bi-directional high-voltage DC-DC-converter for advanced railway locomotives

Lopatkin, Nikolay N.; Zinoviev, Gennady S.; Zotov, L. G.

doi:10.1109/ecce.2010.5617846

Cited by 18 publications

(6 citation statements)

References 2 publications

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“…With the development of power electronics technology, high-power DC/DC converter with different topology and control strategy has been widely studied. In [31], a 3 MW, 3 kV to 18 kV DC/DC converter is simulated. It is reported that the efficiency is around 95%.…”

Section: Dc/dc Convertermentioning

confidence: 99%

Coordinated control strategy for doubly‐fed induction generator with DC connection topology

Nian

2015

IET Renewable Power Generation

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With the development of wind power generation system and requirement of large-scale and long-distance power transmission, it is greatly important for wind farm to achieve the high effective DC grid connection technology. This study presents a novel grid connection topology for doubly-fed induction generator (DFIG) connected to a DC-link, in which a stator side converter and rotor side converter fed by a common DC bus are employed. Coordinated control method for the converters is proposed to regulate the electromagnetic torque directly based on the air-gap flux orientation technique. Compared with the traditional grid connection system, the proposed system has a lot of advantages such as simpler structure, lower requirement for the converter capacity and higher power transmission efficiency. The power distribution between stator side converter and rotor side converter is analysed based on the proposed grid connection topology. Finally, DFIG-based experimental system is developed to validate the correctness and availability of the proposed DC grid connection topology and control strategy.

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Section: Dc/dc Convertermentioning

confidence: 99%

Coordinated control strategy for doubly‐fed induction generator with DC connection topology

Nian

2015

IET Renewable Power Generation

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“…The recent advancements of distributed PV capacity has attracted the researchers to integrate it with DC distribution networks, specifically of medium voltage, and the key device connecting them is a MVDC converter with a high voltage ratio. Since the last decade, the MVDC converter having a high rise voltage ratio has been studied widely, such as non-isolated switched capacitor converters [9], and resonant switched capacitor converters [10][11][12], and isolated composite full-bridge zero-current switches (zero current switching, ZCS) inverter [13][14][15][16]. Nonisolated converters do not have the ability to isolate electrical faults between the renewable energy side and the MVDC bus.…”

Section: Introductionmentioning

confidence: 99%

Hybrid resonant three‐level ZCS converter suitable for photovoltaic power MVDC distribution network

Azeem

Tariq

Mehmood

et al. 2020

IET Renewable Power Generation

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This study presents a hybrid resonant three-level (TL) zero-current-switching (ZCS) converter for distributed photovoltaic power applications accessing medium-voltage DC (MVDC) distribution network. The main constituents of the converter is a neutral point clamped TL circuit, an auxiliary circuit along with two transformers and six switches. The ZCS condition of the TL circuit is reached by operating the auxiliary circuit utilising pulse width modulation technique. It delivers the majority of the power and the switching loss is remarkably reduced. A section on the influence of the turn's ratio of the auxiliary transformer on the current is also presented. The piecewise linear electrical circuit simulation simulation results validate the designed parameter principles. For the sake of comparison, an experimental prototype is developed of 300-1500 V/1500 W to validate the performance of the proposed converter.

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“…Thus, the VSC used need to be rated only for low voltage rating. The two-stage scheme has gained wider acceptance and several converter topologies are presented in [13][14][15][16][17][18][19][20][21][22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

“…In parallel to these developments, soft-switched DC-DC converter topologies with high voltage gain based on the principle of 'Marx generator' circuit concept has been proposed. The switched capacitor DC-DC converters based on this principle were presented in [21] for railway applications. The DC-DC converters based on the Marx generator principle for HVDC power tapping was presented in [22][23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Integration of renewable energy sources with LCC HVDC system using a new circuit topology with DC fault ride‐through capability

Mathew

Das

Sharma

2020

IET power electron.

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The integration of remote renewable energy sources located near the long-distance HVDC transmission corridor to the HVDC system is an active area of research. This study presents a new fault-tolerant scheme using a modular soft-switched DC-DC converter with high-voltage gain to integrate renewable energy sources to LCC-based HVDC systems. The configuration, operating principle and mathematical modelling of the new DC-DC converter are described in this study. As both the charging and discharging processes takes place through resonant circuits, zero current switching of all the switches used in the converter is achieved. The proposed scheme has the inherent fault-tolerant capability and enables fast recovery from commutation failures in the main LCC HVDC system. The operation of the proposed scheme during various fault scenarios is analysed and explained in this study. The performance of the proposed scheme and its fault ride though the capability is verified using a simulation model built in PSCAD/EMTDC and an experimental prototype.

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Bi-directional high-voltage DC-DC-converter for advanced railway locomotives

Cited by 18 publications

References 2 publications

Coordinated control strategy for doubly‐fed induction generator with DC connection topology

Coordinated control strategy for doubly‐fed induction generator with DC connection topology

Hybrid resonant three‐level ZCS converter suitable for photovoltaic power MVDC distribution network

Integration of renewable energy sources with LCC HVDC system using a new circuit topology with DC fault ride‐through capability

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