Suppression of power system forced oscillations based on PSS with proportional‐resonant controller. (2nd February 2017)

• Record Type: Journal Article
• Authors: Feng, Shuang; Jiang, Ping; Wu, Xi
• Is Part Of: International transactions on electrical energy systems. Volume 27:Number 7(2017:Oct.)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2017-02-02
• Subjects: critical stability gain -- forced oscillations -- power system stabilizer -- proportional‐resonant controller; Electric power -- Periodicals; Electric power systems -- Periodicals; Electrical engineering -- Periodicals; 621.3
• DOI: 10.1002/etep.2328
• Languages: English
• ISSNs: 2050-7038

Abstract

Summary: Power system forced oscillations are low‐frequency oscillations caused by external fluctuating power disturbances. They could still happen even when power system stabilizers (PSSs) are installed, jeopardizing the safety and stability of power grid seriously. The reason for the unsatisfying suppression performance of PSS on forced oscillations is investigated in this paper. The result reveals that limited by the critical stability gain, conventional PSS is hard to mitigate forced oscillations effectively while maintaining the stability of power system. Then, aiming at suppressing forced oscillations, a novel PSS with proportional‐resonant controller is proposed. By leveraging proportional‐resonant controller, the amplification factor of the disturbance at the oscillation frequency is reduced significantly without approaching the critical stability gain. Hence, the stability of the system is not influenced. The simulation results in 16‐machine and 68‐bus system demonstrate that, compared with conventional PSS, the proposed method has better performance on suppressing forced oscillations of both single mode and multimode caused by various types of disturbances.