In a power system with a high penetration of wind power generation, it is required that the wind turbines support the grid voltage during voltage deviations to ensure the system''s security. After a voltage drop, the system''s P – U curve is shown in Figure 2.
Abstract – Voltage stability refers to the ability of a power system to maintain steady voltages at all buses in the system after being subjected to a disturbance during a given initial operating condition. Voltage stability depends on a power system’s ability to maintain and/or restore equilibrium between load demand and supply.
The aforementioned research findings are useful for enhancing the voltage stability of power grids with new energy sources, but the transient voltage response of grid-forming wind power systems and parameter ranges lack a theoretical design basis.
To ensure the system''s voltage stability, there are certain requirements for the short-circuit capacity, STP at the grid connection point in the fault test experiments. According to industry standards , its value should be greater than three times the rated capacity, SWTN of the wind turbine.
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