Extensible auxiliary power supply system suitable for submarine power supply and control method thereof

Abstract

The invention discloses an extensible auxiliary power supply system suitable for a submarine power supply and a control method of the extensible auxiliary power supply system, and only one high-insulation bus is used for connecting all high-voltage side auxiliary power units and low-voltage side auxiliary power units, so that mutual insulation of all the auxiliary power units is realized. According to the auxiliary power system, the auxiliary power units are the same in structure, the expandability of the auxiliary power system is very high by adopting a single-bus connection mode, and the auxiliary power system can be suitable for seabed power supplies of different voltage levels and power levels and medium-voltage direct-current converters of other similar structures. According to the invention, power can be locally taken from the interior of the submarine power supply through the power taking circuit and then converted into auxiliary power required by the power module control unit and the overall control unit, and external power supply or control is not needed. Compared with an auxiliary power system in a mode of taking power from a medium-voltage direct-current input submarine cable, the auxiliary power system is simple in structure and high in reliability.

Description

technical field [0001] The invention relates to an isolated auxiliary power supply technology, in particular to an expandable auxiliary power supply system suitable for a submarine power supply and a control method thereof. Background technique [0002] With the development of the submarine observation network, a highly reliable submarine power supply is required to provide power guarantee for the submarine observation network. At present, the most common solution for submarine power supply is to use a modular combined structure. One of the difficulties it faces is that since the submarine power supply is placed on the seabed, the connection with the coast is through an optoelectronic composite submarine that transmits medium-voltage DC and optical communication signals. There is no additional auxiliary power line to supply power to the control circuit in the subsea power supply, so the subsea power supply needs to go through a black start process. At the same time, the pow...

AI Technical Summary

Problems solved by technology

If the auxiliary power supply fails, or the failure of a certain auxiliary power supply leads to the failure of the entire auxiliary power supply system, the submarine power supply cannot start or work normally, and the reliability is low.

Moreover, when the number of power modules of the subsea power supply changes, the auxiliary power supply needs to be expanded and parameterized, and the output number is low in scalability.

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