Vienna Rectifiers for WECS Applications With Open-End Winding PMSM

Over the past few years, there has been an increase in the use of open-end winding (OEW) PMSM applications. The fault tolerance of the topology makes OEW PMSM suitable for various intermittent operations. However, a dual inverter operation causes OEW PMSM drive schemes to exhibit high commutation and ripple. This paper presents an optimized alternative fixed switching 12-sector space vector pulse width modulation (svpwm) control for open-end winding PMSM drives. This work reduces the commutation number without compromising drive system performance. In comparison with conventional 6-sector svpwm, this control scheme offers three advantages. It incorporates optimal signal generation, a virtual state method for segmenting sectors into small sectors, and alternative fixed switching methods based on sub-hexagons. Inverters are assigned fixed voltage states based on sub-hexagon numbers. The proposed scheme was validated in the Matlab2021b Simulink environment. Based on the simulation results, it is found that the proposed scheme is effective for OEW PMSM. Finally, OPAL-RT (OP4500) is used to verify scheme effectiveness. The verification of the proposed scheme indicates its effectiveness. Results obtained from real-time hardware have ripple of 1.25% and 5% for speed and torque performance, respectively.

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“…An OEW PMSM with multi-level feed is presented in [22] and [23]. The purpose of this scheme is to improve output.…”

Section: Multi-level Inverters Have Revolutionized High-power Andmentioning

confidence: 99%

An Optimized Alternative Fixed Switching 12-Sector Space Vector Pulse Width Modulation Control of Open-End Winding PMSM Drive

Lemma

Pradabane

2023

IEEE Access

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“…PWM rectifiers, due to their advantages of bidirectional energy flow and achieving unit power factor, have significantly reduced requirements for filtering devices compared to uncontrolled and semi controlled rectifiers, and have a larger adjustment range. Therefore, they have been widely used in emerging industries such as new energy vehicles, energy storage converters, and electric aircraft [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

Research on three-level PWM Rectifier without grid voltage sensor

Gao,

Yan,

Peng

et al. 2024

J. Phys.: Conf. Ser.

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Traditional three-level PWM rectification technology usually uses voltage sensors to sample the grid voltage, and then obtains the angle information of the voltage vector through a phase-locked loop, thereby achieving the d/q axis control function of voltage and current. However, the use of voltage sensors not only increases system costs, but also increases system volume and debugging difficulty. In addition, when the voltage sensor is damaged, it can cause system shutdown and affect system reliability. After analyzing the three-level control method of PWM rectifiers, a sensorless control strategy for grid voltage based on sliding mode observer method is proposed. By using the sliding mode observer method to estimate the amplitude and phase of the power grid voltage at the voltage and current values of each PWM cycle, a phase-locked loop is used to determine the position of its voltage vector. The simulation results all demonstrate that the proposed method can accurately and effectively estimate the voltage vector angle of the power grid, and ensure that the output of the rectification system meets the standard voltage waveform.

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“…One of the concerns of multilevel converters is the large number of active power devices needed. In view of the unidirectional power flow characteristics of wind turbines, i.e., from the generator to the grid, in order to reduce the number of power devices, the unidirectional Vienna-type three-level converter can be used, where the main active power devices such as IGBTs can be replaced by diodes [15], [16], [17]. This simplification thanks to the unidirectional power flow can reduce the cost of power devices, reduce the number of required gate drivers, reduce failure rates of the active devices and remove the need of deadtime in the modulation.…”

Section: Introductionmentioning

confidence: 99%

A Unidirectional Cascaded High-Power Wind Converter With Reduced Number of Active Devices

et al. 2023

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For large offshore wind turbines, cascaded H-bridge wind power converters can raise the wind generator voltage to a medium voltage level such as 10kV, which is favored for reducing the generator current, mitigating issues such as cable twisting in low-voltage, high-current configurations. In order to reduce the number of required active power devices, this paper presents a unidirectional-power-flow medium voltage high-power cascaded wind power converter. The proposed topology uses a unidirectional cascaded H-bridge rectifier as the generator-side converter to connect the medium-voltage permanent synchronous wind generator. The proposed topology reduces the number of active power devices and their associated gate driver circuits, control, etc. A zero deadtime modulation method is also presented for the generator side converter, which can eliminate the deadtime and improve the voltage and current waveform quality. Furthermore, the proposed topology will not increase the converter power losses as analyzed in the paper, or sacrifice dynamic control performance. Simulation and experiment results are presented, which validate the proposed unidirectional power conversion system.INDEX TERMS Cascaded H-bridge, unidirectional power flow, wind power converter, zero deadtime modulation.

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Vienna Rectifiers for WECS Applications With Open-End Winding PMSM

Cited by 13 publications

References 28 publications

An Optimized Alternative Fixed Switching 12-Sector Space Vector Pulse Width Modulation Control of Open-End Winding PMSM Drive

An Optimized Alternative Fixed Switching 12-Sector Space Vector Pulse Width Modulation Control of Open-End Winding PMSM Drive

Research on three-level PWM Rectifier without grid voltage sensor

A Unidirectional Cascaded High-Power Wind Converter With Reduced Number of Active Devices

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