A high-voltage direct current transmission and distribution system for tethered balloons

Abstract

The present invention discloses a high-voltage direct current distribution system for a captive balloon. The system comprises an aboveground power supply portion and an on-balloon power supply and distribution portion; the aboveground power supply portion comprises an alternating current supply network which is connected with an AC / DC rectifier; the aboveground power supply portion and the on-balloon power supply and distribution portion are connected through a high-voltage direct current cable, and an input end of the high-voltage direct current cable is connected with an output end of the AC / DC rectifier; the on-balloon power supply and distribution portion is configured to perform power supply and distribution for an on-balloon device, wherein the on-balloon device comprises an on-balloon DC / DC converter set, a load converter set and an on-balloon integrated distribution unit; and an output end of the on-balloon integrated distribution unit is connected with a balloon device and a load device, a direct current bus of the balloon device is distributed to the balloon device through the on-balloon integrated distribution unit, and electric energy output by the load converter set isdistributed to the load device through the on-balloon integrated distribution unit. The high-voltage direct current distribution system for the captive balloon can effectively improve the transmission capability of the high-voltage cable, reduce weight of the on-balloon power supply and distribution portion, simplify a power supply and distribution device and improve the system reliability.

Description

technical field [0001] The invention belongs to the technical field of power supply and distribution devices for tethered balloons, and in particular relates to a high-voltage direct current power transmission and distribution system for tethered balloons. Background technique [0002] At present, the power transmission and distribution system of tethered balloon products on the market adopts a high-voltage AC scheme, that is, power frequency or intermediate frequency AC power is used for transmission: the power of the power supply network passes through the power frequency or intermediate frequency step-up transformer on the ground to raise the AC power pump to thousands of volts After the high-voltage alternating current is transmitted to the ball through a long-distance tethered supply cable, the power frequency or intermediate frequency step-down transformer mounted on the ball converts the electric energy into low-voltage power frequency and intermediate frequency voltag...

AI Technical Summary

Problems solved by technology

[0006] 3) The use of AC power supply has the problem that power harmonics affect the power supply quality of equipment on the ball. The impact is particularly serious when the transmission distance is long and the power of the equipment is large. It is even necessary to configure professional harmonic elimination equipment on the ground for this problem (active power filter) for harmonic control to ensure that the equipment on the ball can work normally, which undoubtedly increases the cost of system application and reduces the reliability of the system

HVDC power transmission has the characteristics of no inductive reactance and capacitive reactance, no system stability problems, easy to limit short-circuit current, fast adjustment speed, etc. It is easy to realize underground or submarine cable power transmission, but it has not been applied in the power supply and distribution system of tethered balloons

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