Constant current power supply system for cable submarine observation network with stable adjustment of node total output power

Abstract

The invention discloses a constant-current power supply system of a cable-based submarine observation network in which the total output power of a node is stabilized and adjusted, comprising a constant-current power supply; an external load; a DC / DC Module, DC / DC-1-DC / DC-n; also including: switches K11-Kn1 on the input side connected in parallel to input sides of the DC / DC-1-DC / DC-n; power balancers, which are respectively connected with DC / DC-1-C / DC-n output side, can be automatically adjusted according to the load size, and the equivalent resistance can be adjusted from a certain value to infinity and equivalent resistance and the equivalent resistance value can be fixed by an external signal; the switch K22-Kn2, having one side connected to the output voltage line and the other side connected to the DC / DC-2-DC / DC-n output side high voltage lines; current controllable loads, wherein the current flowing through the same is adjustable from 0A to the maximum output current of the DC / DCmodule; switches K13-Kn3 having one side connected to the current controllable load input and the other side to DC / DC-1-C / DC- n Output side high voltage lines. The invention ensures the energy utilization rate of the constant current observation network, and also ensures the stability and reliability of the system.

Description

technical field [0001] The invention belongs to the field of marine exploration, and in particular relates to a constant-current power supply system for a cabled seabed observation network with stable adjustment of the total output power of nodes. Background technique [0002] The traditional ocean observation method is mainly ship-based surveys, but due to factors such as ship time and weather, ship-based surveys can only be intermittent or scattered. The satellite telemetry and remote sensing earth observation system has realized the long-term and continuous observation of the ground and sea surface, but it cannot penetrate the huge seawater to directly observe the deep seabed. The self-contained or moored bottom hitters deployed by ships can only support short-term power supply for a small number of subsea equipment, cannot transmit data in real time, and require frequent and regular maintenance. All kinds of underwater vehicles are powerful tools for deep-sea environmen...

AI Technical Summary

Problems solved by technology

However, in this scheme, there are many defects in directly cutting out / cutting in the "DC / DC module". DC / DC module" input voltage will rise instantaneously; for example, when there are only two "DC / DC modules", the input voltage is 100V each, and the submarine cable voltage is 200V, if the second "DC / DC module" is cut out at this time , the 200V voltage of the original submarine cable will not drop instantaneously, but is all added to the first "DC / DC module", so that the first "DC / DC module" bears twice its rated working voltage, which may cause cause permanent damage to the circuit

[0006] Similarly, when the "DC / DC module" is cut in (cancel the short circuit), due to the long submarine cable, the input voltage of the other "DC / DC modules" will drop instantaneously, which may cause the remaining "DC / DC modules" to undervoltage and not work. , causing the system to crash

The existing technology is to directly reset the module by bypass to reduce energy loss, but the voltage of other modules will be disturbed during the direct bypass process, and even cause permanent damage to other modules; the entire system will be damaged during the direct reset process. Momentary power failure may cause system crash

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