Analysis of start-up inrush current and its mitigation control strategy for grid connected voltage source inverter

He, Jinmei; Jun, Yjin; Gong, Bin; Lei, Jiansheng; Liu, Yang; Long, Fei

doi:10.1109/itec-ap.2014.6941205

Cited by 12 publications

(5 citation statements)

References 17 publications

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“…However, applying the methods in [16,17], one needs to introduce more ancillary equipment, resulting in expensive costs. Apart from these, other active control methods add the transition procedure between the uncontrollable rectification state and the controllable rectification state of the PWM rectifier [18][19][20][21][22]. It should be pointed out World Electr.…”

Section: Introductionmentioning

confidence: 99%

Suppression Strategy of Starting Current Impulse in the Front Stage Rectifier of Electric Vehicle WPT System

Li,

Lv,

Yang

2024

WEVJ

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The three-phase voltage type Pulse Width Modulation (PWM) rectifier is widely used in the front-end power factor of electric vehicle wireless charging systems due to its simple control structure and easy implementation. The system often adopts a double closed-loop PI control method based on voltage and current, which inevitably leads to a significant starting current surge and poses significant risks to the safe operation of the equipment. On the basis of establishing a mathematical model for PWM rectifiers, this article analyzes in detail the causes of starting over-current and designs a starting strategy with a voltage outer proportional and integral separated active current directly given. Simulation experiments show that this method can reduce the starting over-current of PWM rectifiers and the excessive DC voltage surge towards normal operation during the starting process.

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Section: Introductionmentioning

confidence: 99%

Suppression Strategy of Starting Current Impulse in the Front Stage Rectifier of Electric Vehicle WPT System

Li,

Lv,

Yang

2024

WEVJ

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“…Control techniques can be effective for compensating these harmonics in inverters [10]. Injection of current or voltage to increase the immunity to harmonics or inrush interference events have been proposed [11], [12]. An Established method to smooth out current transients and harmonics would be the implementation of power line filters [13].…”

Section: Introductionmentioning

confidence: 99%

Micro-Grid Inrush Current Stability Analysis

Matthee

Moonen

Leferink

2021

2021 IEEE International Joint EMC/SI/PI and EMC Europe Symposium

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Transient currents can severely impact the operation of weak or islanded grids. Inrush current electromagnetic compatibility challenges, due to their unpredictable and intermittent nature, are very difficult to identify. Using multi-point synchronised measurements, analysis is performed on an inverter. The supply powers various loads that are observed during cold start as well as under load switching conditions. Inrush event triggered failure probability is linked to non linear and average load levels.

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“…However, the inrush current is not particularly dependent on current reference when the converter starts, so such methods of current reference change cannot fundamentally suppress inrush current [15]. Reference [19] injects a reverse DC component current into the main circuit to mitigate the start-up inrush current. However, according to the simulation results in [19], this method can only accelerate attenuation of the inrush current, but cannot fundamentally suppress the generation of inrush current.…”

Section: Introductionmentioning

confidence: 99%

“…Reference [19] injects a reverse DC component current into the main circuit to mitigate the start-up inrush current. However, according to the simulation results in [19], this method can only accelerate attenuation of the inrush current, but cannot fundamentally suppress the generation of inrush current. As a consequence, grid voltage feedforward or filter capacitor voltage feedforward is usually used to fundamentally suppress start-up inrush current [6,15].…”

Section: Introductionmentioning

confidence: 99%

Improved Capacitor Voltage Feedforward for Three-Phase LCL-Type Grid-Connected Converter to Suppress Start-Up Inrush Current

et al. 2017

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Three-phase active damping LCL-type grid-connected converters are usually used in distributed power generation systems. However, serious inrush current will be aroused when the grid-connected converter starts, especially in rectifier mode, if no effective control method is taken. The point of common coupling (PCC) voltage feedforward is usually used to suppress start-up inrush current. Unfortunately, it will introduce a positive feedback loop related to the grid current and grid impedance under weak grid conditions, and therefore, the grid current will be distorted and the system stability margin will be significantly reduced. To solve the above problems, this paper proposes a simple method based on a d-axis fundamental positive-sequence component of filter capacitor voltage feedforward, without extra sensors and software resources. With the proposed method, it is possible to suppress the start-up inrush current and maintain the grid current quality and system stability under weak grid conditions. The mechanism of start-up inrush current and the effectiveness of the method for inrush current suppression are analyzed in detail. Then, the influences of different feedforward methods on system stability are analyzed under weak grid conditions by the impedance model of grid-connected converter. Finally, experimental results verify the validity of the proposed method.

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Analysis of start-up inrush current and its mitigation control strategy for grid connected voltage source inverter

Cited by 12 publications

References 17 publications

Suppression Strategy of Starting Current Impulse in the Front Stage Rectifier of Electric Vehicle WPT System

Suppression Strategy of Starting Current Impulse in the Front Stage Rectifier of Electric Vehicle WPT System

Micro-Grid Inrush Current Stability Analysis

Improved Capacitor Voltage Feedforward for Three-Phase LCL-Type Grid-Connected Converter to Suppress Start-Up Inrush Current

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