Location methods of oscillation sources in power systems: a survey

Abstract

The deployment of a synchrophasor-based widearea measurement system (WAMS) in a power grid largely improves the observability of power system dynamics and the operator's real-time situational awareness for potential stability issues. The WAMS in many power grids has successfully captured system oscillation events, e.g. poorly damped natural oscillations and forced oscillations, from time to time. To identify the root cause of an observed oscillation event for further mitigation actions, many methods have been proposed to locate the source of oscillation based on different ideas and principles. However, most methods proposed so far for locating the oscillation source in a power grid are not reliable enough for practical applications. This paper presents a comprehensive review of existing location methods, which basically fall into four major categories, plus a few other methods. Their advantages and disadvantages are discussed in detail. Some trends and challenges on the problem of oscillation source location are pointed out along with potential future research directions. Finally, a practical, general scheme for oscillation source location using available location methods is suggested and analyzed.

Application of unknown input observers to locate forced oscillation source

“…Besides poorly damped oscillation, it is well recognized that there is another common type of low‐frequency oscillation, known as forced oscillation. Extensive research has been reported on the subject …”

“…More specifically, methods for locating forced oscillation sources are proposed recently in the literatures . Wang and Sun gives a comprehensive review of the location methods and elaborates on their advantages and disadvantages.…”

“…More specifically, methods for locating forced oscillation sources are proposed recently in the literatures . Wang and Sun gives a comprehensive review of the location methods and elaborates on their advantages and disadvantages. Typical existing methods can be mainly summarized as hybrid simulation method, energy‐based methods, damping torque methods, mode shape estimation methods, effective generator impedance method, etc.…”

“…It shows important guiding significance to analyze the relation between oscillations and transient energy dissipation, for both forced oscillations and poorly damped oscillations. It has been applied to both simulation cases and practical events . Its robustness in practical applications needs to be further improved .…”

Damping control for a target oscillation mode using battery energy storage

“…The phenomenon of power system oscillation can be caused by many factors such as insufficient system damping, forced oscillation [2], external periodic load perturbation [3], parametric resonance [4] and modal interaction [5], etc. Conventionally, this problem can be partially solved by fine-tuning the parameters of power system stabilizers (PSSs) of the involved generators.…”