The invention discloses a traction power supply direct hanging type high voltage comprehensive compensation device, which belongs to the field of electric energy quality control. The traction power suThe invention discloses a traction power supply direct hanging type high voltage comprehensive compensation device, which belongs to the field of electric energy quality control. The traction power su 100. The traction power supply direct hanging type high voltage comprehensive compensation device can directly access a traction network without an input-output line frequency transformer through ano 100. The traction power supply direct hanging type high voltage comprehensive compensation device can directly access a traction network without an input-output line frequency transformer through anAC reactor, and can realize the comprehensive compensation including negative sequence, idle work, and harmonic wave. AC reactor, and can realize the comprehensive compensation including negative sequence, idle work, and harmonic wave.pply direct hanging type high voltage comprehensive compensation device comprise 2 K-level cascade arms, 2k energy storage capacitors, and K isolated type both-way DC converts (2). A rectification sidpply direct hanging type high voltage comprehensive compensation device comprise 2 K-level cascade arms, 2k energy storage capacitors, and K isolated type both-way DC converts (2). A rectification side voltage converter (3) is connected with an inversion side voltage converter (4) through a high frequency isolating transformer (5). K DC leading-out terminals of the rectification side voltage convee voltage converter (3) is connected with an inversion side voltage converter (4) through a high frequency isolating transformer (5). K DC leading-out terminals of the rectification side voltage converter (3) are connected in parallel with power units corresponding to left K-level cascade arms (1-1) through the energy storage capacitors; The K DC leading-out terminals of the inversion side voltagerter (3) are connected in parallel with power units corresponding to left K-level cascade arms (1-1) through the energy storage capacitors; The K DC leading-out terminals of the inversion side voltage converter (4) are connected in parallel with power units corresponding to right K-level cascade arms (1-2) through the energy storage capacitors; and the level number K is a positive integer from 1 tconverter (4) are connected in parallel with power units corresponding to right K-level cascade arms (1-2) through the energy storage capacitors; and the level number K is a positive integer from 1 to