The invention discloses a hybrid high voltage direct current power transmission system suitable for wind power delivery. At the transmitting end of the power transmission system, a three-phase unlimited voltage source is connected with a conversion station of a rectification side, the conversion station of the rectification side comprises a conversion transformer and a modular multilevel converter(MMC) of a half-bridge MMC sub-module. The MMC of the conversion station of the rectification side is connected with a bipolar direct current line. The bipolar direct current line is connected with ahybrid high voltage direct current circuit breaker in series. The bipolar direct current line is connected with a conversion station of an inverter side. The conversion station of the inverter side comprises a conversion transformer and a line commutated converter (LCC). The conversion station of the inverter side is connected with a receiving end alternating current system. The receiving end alternating current system adopts a three-phase unlimited grid. The system can prevent the impact of alternating current bus overvoltage caused by direct current block on wind power accessing, and can solve the fault of the direct current side automatically.