HVDC Transmission Technology of Wind Power System with Multi-Phase PMSG

Shijia Zhou,Zhangtao Yin,Fei Rong,Yuebin Zhou,Shoudao Huang

doi:10.3390/en11123294

Shijia Zhou, Zhangtao Yin + Show 3 more

Open Access

https://doi.org/10.3390/en11123294

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Journal: Energies	Publication Date: Nov 26, 2018
Citations: 4	License type: CC BY 4.0

Affiliation: Hunan University, China Southern Power Grid (China)

Abstract

The high voltage DC (HVDC) transmission technology of wind power system, with multi-phase permanent magnetic synchronous generator (PMSG) is proposed in this paper. Each set of three-phase winding of the multi-phase PMSG was connected to a diode rectifier. The output of the diode rectifier was connected by several parallel isolated DC–DC converters. Each DC–DC converter was connected to a sub-module (SM). All SMs and two inductors were connected in a series. The proposed wind power system has several advantages including, transformerless operation, low cost, low voltage stress, and high fault tolerance. The maximum power point tracking (MPPT) and energy balance of the DC–DC converters were achieved by controlling the duty cycles of the DC–DC converters. The HVDC transmission was achieved by the nearest level control (NLC) with voltage sorting. The simulation model with 18-phase PMSG was established. Experimental results were also studied based on RT-Lab.

Highlights

Offshore wind farms (OWFs) have attracted considerable attention over recent years, as wind-based resource is abundant far off shore [1]
The capacitor voltage increased to 1.8%, which is because the MMF, excited by the five three-phase windings, was no longer of the SM which was connected to the broken-down DC–DC converter decreased to 993 V, while the symmetrical due to the lack of one set of three-phase winding
HVDCtransmission transmissiontechnology technology of of wind wind power power system ininthis paper, which has the advantages of transformerless operation, low cost, low voltage stress, this paper, which has the advantages of transformerless operation, low cost, low voltage stress, and high fault tolerance

Summary

Introduction

Offshore wind farms (OWFs) have attracted considerable attention over recent years, as wind-based resource is abundant far off shore [1]. With this topology, the power is delivered to the DC grid by a centralized AC–DC rectifier, which is usually implemented by a multi-modular converter (MMC). The centralized AC–DC converter has been realized by use of a diode rectifier as highlighted in reference [11]. In this case the DC voltage fluctuates significantly.

Methods

Results

Conclusion