Research on wind power penetration limit considering voltage stability.

With the continuous increase in wind power penetration in power systems, accurately assessing the maximum wind power capacity that the power grid can accommodate has become an important issue. The reactive power support capability of the power grid directly affects its voltage stability, thereby limiting the capacity for wind power integration. Therefore, this paper proposes a novel method for assessing the wind power penetration limit (WPPL) considering voltage stability. Firstly, the reduced-order Jacobian matrix of the power system is employed to mechanistically analyze the impact of wind power integration on modal eigenvalues. Secondly, the analytical calculation method for WPPL under the voltage stability constraint is proposed with theoretical derivation. Subsequently, case studies are conducted on a constructed wind-integrated power system and a modified IEEE 39-bus system. Comparisons with other methods validate that the proposed method can rapidly and effectively estimate the WPPL. Finally, the key factors affecting the WPPL are analyzed, and practical engineering measures to improve the WPPL are summarized, offering valuable technical support for power grid planning.