Energy-saving modular high-voltage direct current (DC) power system

Abstract

The invention discloses an energy-saving modular high-voltage direct current (DC) power system which comprises an alternating current (AC) input circuit, at least two rectifier modules, a monitoring module and a DC output circuit, wherein the AC input circuit is connected with the input end of each rectifier module; the DC output circuit is connected with the output end of each rectifier module; the monitoring module is connected with the AC input circuit, the DC output circuit and each rectifier module; the total number of the rectifier modules is W, and the number of redundancy rectifier modules is X; W is an integral number being larger than 1, and X is also an integral number; the rectifier modules are used for converting AC into DC; the DC output circuit is used for outputting the DCconverted and output from the rectifier modules to a load; and the monitoring module is used for monitoring the total output current of each rectifier module and partially or entirely making W-N-X rectifier modules dormant according to a number N of the rectifier modules actually required by the total output current. The system can make redundant rectifier modules dormant so as to save energy.

Description

Technical field [0001] The invention relates to the field of power supply systems, in particular to an energy-saving modular high-voltage direct current (HVDC) power supply system. Background technique [0002] With the construction and development of IT networks in industries such as communications, internet, finance, e-government, office automation, and industrial control automation, once the operation support equipment provided for these services is interrupted, it will bring huge economic losses. It is important to provide reliable power supply guarantee. At the same time, with the increase of electrical equipment, more and more electricity is supplied, and high efficiency and energy saving have become an important indicator of power supply. [0003] The traditional AC UPS (Uninterruptible Power Systems, uninterruptible power supply) power supply structure has a relatively low reliability inverter link bottleneck. Because the traditional AC UPS power supply system outputs AC ...

AI Technical Summary

Problems solved by technology

If all the rectifier modules in the system have been working for a long time, it will inevitably cause the power system to work in a low-load and low-efficiency state for a long time

[0007] However, due to reasons such as user investment, planning, and system availability requirements in different places, HVDC power systems often work under very small load conditions most of the time.

However, the working efficiency of the power system at a small load rate is often much lower than that at a large load rate.

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