With the large-scale integration of renewable energy and power-electronic devices

power system oscillations have gradually extended from traditional low-frequency oscillations to sub-/super-synchronous and medium-/high-frequency bands. Wide-band oscillations have become a critical issue affecting the secure and stable operation of new-type power systems. Fast and accurate oscillation-source location is an important prerequisite for oscillation suppression and risk mitigation. By characterizing the injection

transmission

and dissipating processes of oscillation energy

energy-based methods transform the oscillation-source-location problem into the identification of energy flow direction and energy generation/consumption

offering advantages such as clear physical interpretation

low model dependence

and good suitability for online applications based on wide-area measurement data. This paper reviews power system oscillation-source location methods for power systems based on the dissipating energy flow (DEF). First

wide-band oscillation phenomena

frequency-band characteristics

and oscillation sustaining mechanisms are summarized

and the energy essence of negative-damping oscillations and forced oscillations is clarified from the perspective of energy injection and damping dissipation. Second

with dissipating energy flow (DEF) as the main thread

this paper systematically reviews the basic principles

engineering applicability and limitations of classical DEF

complex dissipating energy flow (CDEF)

cut-set energy method

frequency-domain/time-frequency-domain extension methods

and multi-mode decomposition-assisted methods. On this basis

the adaptability of DEF-based methods for wide-band oscillation-source location is further analyzed. Finally

the major challenges in extending the reviewed methods to wide-band oscillation-source location are summarized

and future research directions are discussed

including multi-source and multi-mode coupling

measurement data quality and wide-band measurement adaptability

internal oscillation source identification of devices

online computational efficiency

and engineering standardization. This work can provide references for the research and engineering application of wide-band oscillation-source location methods in new-type power systems.