Use of power electronic converters to suppress transformer inrush current

Wani, Manisha; Kurundkar, Kalyani; Bhawalkar, Mandar

doi:10.1109/pedes.2012.6484452

Cited by 14 publications

(5 citation statements)

References 11 publications

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“…During the DC source operation start-up, one of the main issued faced is high surge current, before its reaching steady state. The instantaneous surge current, drawn by power supply is called inrush current or turn-on current [28][29][30]. This current can be as high as 20 times steady state current, and can caused damaged to power supply load.…”

Section: Inrush Limiting Current and Output Capacitormentioning

confidence: 99%

Independent high voltage DC source development for renewable-grid integration interface

Hassan

Zulkifli

Zainal

et al. 2020

IJPEDS

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<span>Recent advancement in renewable-grid integration research, due to the concern on the environmental impact, leads to extensive study in isolated power converter as their interface. As part of isolation capability in power converter interface, extensive study of magnetic component has been carried out, especially on the design, construction and optimisation to achieve optimal operation. One of the main issue in verifying the analytical power loss model is to have independent HVDC link power source for an experimental validation work. This paper focus on the design and construction of DC link source, to be use in the experimental rig setup. Several DC link source option has been evaluated, and TDK-lambda PF500-360A power supply was selected due to the availability and excellent energy efficiency offered, at better price. External circuit is designed and implemented to achieve desired voltage and current supply characteristic. At the end, the voltage and current of the DC link supply for Dual H-bridges is obtained and shown promising result for experimental rig measurement and data collection work.</span>

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Section: Inrush Limiting Current and Output Capacitormentioning

confidence: 99%

Independent high voltage DC source development for renewable-grid integration interface

Hassan

Zulkifli

Zainal

et al. 2020

IJPEDS

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“…Amid most handy framework conditions, this present transient is of a high values, may be the ten times the full load current of the transformer. This transient which is rich in all harmonics has been found to bring about wide boiling over disturbing influences in influence framework and influence supplies [1]- [2]. Lately a few arrangements have been prescribed to beat the issue like diode bridge with DC reactor and voltage source PWM converter are utilized [3], putting the resistance in arrangement or at the impartial point to the twisting of transformers [4].…”

Section: Introductionmentioning

confidence: 99%

A Novel Transient Current Limiter Based on Three-Phase Thyristor Bridge for Y-yg Transformers

Shrivastav

Sadhu

Ganguly³

et al. 2015

IJPEDS

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The transformer in flux current may be a transient current that happens in electrical devices has been charged. This current depends on completely different parameters probably the voltage magnitude, the switching on angle the permanent flux, the core physical phemeon characteristics, the primary circuit resistance, etc. To beat the issues arising owing to transients, these are required to be suppressed.In this paper, an easy and economical techniquie is conferred to limit the transient current of the Y-yg transformers. One amongst the most benefit of this technique is it doesn't would like any negative feedback circuit or activity unit. The tactic relies on a three-phase thyristors bridge single RL reactor with the individual phases of electrical device. Since the amount of thyristors is reduced, the voltage ripple, electrical losses and therefore the malfunction likelihood due to device failure is reduced significantly. The projected technique has been simulated by MATLAB simulation. It's shown that the projected method is a lot of economical for the transient current limitation of Y-yg transformers.

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“…Finally, the inrush current can be decreased. Although this technique is simple and leads to inrush current reduction, it has two disadvantages: the excessive loss and the considerable cost to upgrade the breakers [17,69,70].…”

Section: Pre-insertion Resistor Strategymentioning

confidence: 99%

“…If the appropriate time for transformer energization is at the peak of the voltage waveform, reduction of the transient flux caused by the transformer core and consequently inrush current are certain. However, transformer energization at the zero point on the voltage waveform can lead to the generation of a peak inrush current [69]. Therefore, there are three various strategies for controlled energization of the transformer that are discussed below.…”

Section: Controlled Switching Strategymentioning

confidence: 99%

“…Over the past decades, many techniques for transformer inrush current control have been proposed, based on the idea that the magnetizing current is dependent on various operating conditions [65]. However, the application of these techniques in HVDC transmission systems has drawbacks such as high costs, high losses and slight reliability [66,67,68,69,70]. Moreover, the reduction of the transformer inrush current in HVDC systems using a pre-insertion resistor has been suggested in Literature [19].…”

Section: Introductionmentioning

confidence: 99%

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Operation of HVDC converters for transformer inrush current reduction

Joukhah¹

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The present PhD thesis deals with transformer inrush current in offshore grids including offshore wind farms and High Voltage Direct Current (HVDC) transmission systems. The inrush phenomenon during transformers energization or recovery after the fault clearance is one of important concerns in offshore systems which can threaten the security and reliability of the HVDC grid operation as well as the wind farms function. Hence, the behaviour of wind turbines,Voltage Source Converters (VSC) and transformer under the normal operation and the inrush transient mode is analyzed. For inrush current reduction in the procedure of the offshore wind farms start-up and integration into the onshore AC grid, a technique based on Voltage Ramping Strategy (VRS) is proposed and its performance is compared with the operation of system without consideration of this approach. The new methodology which is simple, cost-effective ensures minimization of transformer inrush current in the offshore systems and the enhancement of power quality and the reliability of grid under the transformer energizing condition. The mentioned method can develop much lower inrush currents according to the slower voltage ramp slopes. Concerning the recovery inrush current, the operation of the offshore grid especially transformers is analyzed under the fault and the system restoration modes.The recovery inrush transient of transformers can cause tripping the HVDC and wind farms converters as well as disturbing the HVDC power transmission. A voltage control design based on VRS is proposed in HVDC converter to recover ali the transformers in offshore grid with lower inrush currents.The control system proposed can assure the correct performance of the converters in HVDC system and in wind farm and also the robust stability of the offshore grid. Esta tesis doctoral estudia las corrientes de energización de transformadores de parques eólicos marinos con aerogeneradores con convertidores en fuente de tensión (VSC) de plena potencia conectados a través de una conexión de Alta Tensión en Corriente Continua (HVDC). Las corrientes de energización pueden disminuir la fiabilidad de la transmisión eléctrica debido a disparos intempestivos de las protecciones durante la puesta en marcha o recuperación de una falta. Para la mitigación de las corrientes de energización durante la puesta en marcha del parque esta tesis propone una nueva estrategia basada en incrementar la tensión aplicada por el convertidor del parque eólico en forma de rampa (VRS). Este método persigue energizar el parque eólico con el menor coste y máxima fiabilidad. La tesis analiza diferentes escenarios y diferentes rampas. Otro momento en que las corrientes de energización pueden dar lugar a un disparo intempestivo de las protecciones es durante la recuperación de una falta en la red de alterna del parque eólico marino. Esta tesis extiende la estrategia VRS, utilizada durante la puesta en marcha del convertidor del parque, para los escenarios de recuperación de una falta.

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Use of power electronic converters to suppress transformer inrush current

Cited by 14 publications

References 11 publications

Independent high voltage DC source development for renewable-grid integration interface

Independent high voltage DC source development for renewable-grid integration interface

A Novel Transient Current Limiter Based on Three-Phase Thyristor Bridge for Y-yg Transformers

Operation of HVDC converters for transformer inrush current reduction

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