Voltage support strength analysis and stability control strategy for grid‐forming wind power transmission system

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Abstract
Increasing the short‐circuit ratio (SCR) of the power transmission system is crucial to ensuring voltage stability when the system has a high‐penetration of wind energy resources. This paper first analyses the weak nodes in the power system and quantifies the SCR requirements of these nodes under voltage safety constraints. Based on this analysis, a third‐order dynamic model of a virtual synchronous generator is established, and a design method for virtual transient reactance is proposed to meet the system's SCR requirements. Finally, a power system simulation with high‐penetration of wind energy is constructed, validating that under the proposed voltage stability support control strategy, grid‐forming wind turbines can meet the system's SCR requirements by optimizing the design of transient reactance, thereby improving the voltage stability of the system.
Funding Information
  • National Natural Science Foundation of China (52277100)
  • Natural Science Foundation of Hebei Province (E2023502038)
  • Fundamental Research Funds for the Central Universities (2023MS101)

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