Abstract: 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.