STUDY ON GRID-CONNECTED VOLTAGE INTENSITY AND CONVERTER POWER CAPACITY CONFIGURATION OF GRID-FORMING DOUBLY-FED WIND TURBINES

Yan Xiangwu; Shi Peisheng; Jia Jiaoxin; Tian Shaoze; Zhou Fan

doi:10.19912/j.0254-0096.tynxb.2025-1115

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Acta Energiae Solaris Sinica ›› 2026, Vol. 47 ›› Issue (12) : 409-419. DOI: 10.19912/j.0254-0096.tynxb.2025-1115

STUDY ON GRID-CONNECTED VOLTAGE INTENSITY AND CONVERTER POWER CAPACITY CONFIGURATION OF GRID-FORMING DOUBLY-FED WIND TURBINES

Yan Xiangwu, Shi Peisheng, Jia Jiaoxin, Tian Shaoze, Zhou Fan

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Abstract

This paper investigates voltage ride-through, voltage impact mitigation during voltage sag and swell under large grid disturbances, and converter power capacity allocation for grid-forming doubly fed wind generators. Based on a virtual synchronous machine controlled grid-forming doubly fed wind turbine system, the internal relationships among grid-support strength, point of common coupling voltage sag depth, and the power capacity of the rotor-side and grid-side converters under droop control and constant-voltage control are analyzed. On this basis, a reference for converter power capacity allocation of wind turbine generators under constant-voltage control is provided. Furthermore, the causes of voltage impact under constant-voltage control are analyzed, and an improved constant-voltage control method is proposed. During grid faults, the reactive power control coefficient of the rotor-side converter is optimized to solve the overvoltage and overcurrent problems caused by conventional constant-voltage control. Simulation results show that the proposed method can effectively support grid voltage, reduce voltage impact, improve voltage and transient stability, and enhance the fault operation capability of grid-forming doubly fed wind turbine generators.

Key words

wind turbines / virtual synchronous machine / converter / voltage control low-voltage ride-through / voltage stability / transient stability

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Yan Xiangwu, Shi Peisheng, Jia Jiaoxin, Tian Shaoze, Zhou Fan. STUDY ON GRID-CONNECTED VOLTAGE INTENSITY AND CONVERTER POWER CAPACITY CONFIGURATION OF GRID-FORMING DOUBLY-FED WIND TURBINES[J]. Acta Energiae Solaris Sinica. 2026, 47(12): 409-419 https://doi.org/10.19912/j.0254-0096.tynxb.2025-1115

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