A d-axis current error compensation method based on coupling mechanism for Grid-Connected inverters under weak grid

Wu, Minhai; Zeng, Jun; Ying, Gengning; Liu, Junfeng

doi:10.1016/j.ijepes.2023.109189

Cited by 3 publications

(1 citation statement)

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“…Some field data show that in some areas where wind farms are clustered, wind farms cause large fault currents [4]. Therefore, considering that the accuracy of short-circuit current calculation also has a great influence on the relay protection action, it is necessary to propose a new method for calculating short-circuit current.…”

Section: Introductionmentioning

confidence: 99%

A New Short-Circuit Current Calculation and Fault Analysis Method Suitable for Doubly Fed Wind Farm Groups

Yin,

Qian,

Huang

2023

Sensors

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The transient characteristics of wind farms in groups are quite different; in addition, there is a strong coupling between the wind farms and the grid, and these factors make the fault analysis of the grid with wind farm groups complicated. In order to solve this problem, a mathematical model of the converter is established based on the input-output external characteristics of the converter, and a transient model of a doubly fed wind turbine (DFIG) is presented considering the influence of the low-voltage ride-through control (LVRT) of the converter, and the effect mechanism of the LVRT strategy on the short-circuit current is analyzed. Finally, a short-circuit current calculation model of a doubly fed wind turbine with low-voltage crossing control is established. The interaction mechanism between wind farms during the fault is analyzed, and a short-circuit current calculation method of doubly fed wind farm groups is proposed. RTDS is used to verify the accuracy of the proposed short-circuit current calculation method for doubly fed field groups. On this basis, a method of power grid fault analysis after doubly fed field group access is discussed and analyzed.

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Section: Introductionmentioning

confidence: 99%