Reactive power planning with transient process stability constraint

With the development of smart grid technology, FACTS devices, such as SVC and STATCOM, are widely applied in practice. Since the FACTS devices possess fast dynamic response characteristics, they can provide effective support to power systems stability even during the transient process after severe contingencies. It is helpful to take into account the transient process stability constraints into reactive power planning (RPP) to enhance power system stability. In this paper, a novel RPP model with transient process stability constraints is proposed. Based on two typical operation levels of a power system, the optimal location and capacity of SVC is calculated with the fuzzy clustering method and the interior point method. A case study is carried out based on the IEEE 9-bus system, and the third-order generator model and first-order excitation model are used in the proposed RPP model for optimization analysis. Study results clearly indicate that the proposed method can provide reasonable SVC allocation suggestions to satisfy the stability constraints at both static operation state and the post-contingency transient process.