Power self-matching voltage stabilization type constant-current underwater power supply and power supply method thereof

Abstract

The invention belongs to the technical field of ocean observation, and particularly relates to a power self-matching voltage stabilization type constant-current underwater power supply which convertsconstant current provided by a shore-based constant-current source through a submarine cable into constant voltage required by an electric load and supplies power to the electric load. The constant-current underwater power supply comprises an input detection circuit, a power conversion circuit, an output current detection circuit, a load (R3) and a power matcher circuit, one end of the input detection circuit is connected with a shore-based constant current source through an external submarine cable, the other end of the input detection circuit is connected with the input end of the power conversion circuit and the input end of the power matcher circuit, and the output end of the power conversion circuit is connected with a series circuit formed by connecting the output current detection circuit and an external electric load in series. And the output end of the power matcher circuit is respectively connected with a load (R3) and an output current detection circuit.

Description

technical field [0001] The invention belongs to the technical field of ocean observation, and in particular relates to a voltage-stabilized constant-current underwater power supply with self-matching power and a power supply method thereof. Background technique [0002] As an emerging ocean observation platform, the submarine observation network can realize all-weather, long-term, continuous and real-time observation of the ocean, among which electric energy is an important basis for the normal operation of the submarine observation network. At present, the power supply of the submarine observation network is divided into two modes: constant current power supply and constant voltage power supply, and the constant current power supply mode has become an important model for transoceanic submarine communication and submarine observation network due to its strong ability to resist short-circuit of transmission cables and good system robustness. An important choice for the system...

AI Technical Summary

Problems solved by technology

However, due to the non-constant power working mode of the underwater power load of the submarine observation network, the underwater power supply device under the constant current working mode will cause input voltage fluctuations due to power fluctuations of the power load, which will lead to fluctuations in the supply voltage of the shore-based constant current source. At the same time, the distribution parameters of long-distance submarine cables are numerous, and the fluctuation of power supply voltage will also lead to problems such as large reactive power loss of submarine cables.

[0003] In order to solve this problem, the invention patent "CN201610089978.9" "An Underwater Constant Current and Constant Voltage Conversion Device Applicable to Submarine Constant Current Power Supply System" proposes a method that uses simulated loads to make the underwater power supply constant power output, and then obtain a stable voltage method; however, when the load of the underwater power supply is light, most of the power will be consumed by the simulated load, resulting in a low power utilization rate of the power supply system; the invention patent with the patent number "CN 201710630508.3" "A Constant Current Power Supply System for Load Adaptive Submarine Observation Network" proposes a method to adjust the total output power of nodes by directly cutting in / out the "DC / DC module", which improves the power supply efficiency; however, in this method, the direct The control method of switching in / out the "DC / DC module" still has problems such as the large disturbance caused by the system switching input voltage, and the load adaptive accuracy is limited by the number of modules.

[0004] The invention patent "Constant Current to Constant Voltage Converter and Constant Current to Constant Voltage Device" with the patent number "CN 201610239933.5" proposed to connect switching components in parallel at the input end of the underwater power supply to control the pulse width of the current flowing to the load to meet the load demand and reduce the redundant Current bypass, thereby improving the method of the capacity utilization efficiency of the underwater power supply system; However, this method still does not completely solve the problem that the input voltage fluctuation of the underwater power supply is affected by the load power and the switch duty cycle

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