|Title||Forced Oscillations in the Western Interconnection with the Pacific DC Intertie Wide Area Damping Controller|
|Publication Type||Conference Paper|
|Year of Publication||2020|
|Authors||Felipe Wilches-Bernal, Brian J Pierre, David A Schoenwald, Ryan T Elliott, Raymond H Byrne, Jason C Neely, Daniel J Trudnowski|
|Conference Name||2020 IEEE Power & Energy Society Innovative Smart Grid Technologies Conference (ISGT)2020 IEEE Power & Energy Society Innovative Smart Grid Technologies Conference (ISGT)|
|Conference Location||Washington, DC, USA|
Forced oscillations in power systems are of particular interest when they interact and reinforce inter-area oscillations. This paper determines how a previously proposed inter-area damping controller mitigates forced oscillations. The damping controller modulates active power on the Pacific DC Intertie (PDCI) based on phasor measurement units (PMU) frequency measurements. The primary goal of the controller is to improve the small signal stability of the north south B mode in the North American Western Interconnection (WI). The paper presents small signal stability analysis in a reduced order system, time-domain simulations of a detailed representation of the WI and actual system test results to demonstrate that the PDCI damping controller provides effective damping to forced oscillations in the frequency range below 1 Hz.