Staggered parallel high-stability modularized direct-current current-stabilized power supply system and staggered parallel connection method thereof

Abstract

The invention discloses a staggered parallel high-stability modularized direct-current current-stabilized power supply system, which belongs to the technical field of variable flow in the power industry. The conventional redundancy technology for a voltage type power supply system is applied to a current type power supply system. The conventional staggered parallel connection technology is improved and applied to a current type power supply system. Self-verification synchronization technology is adopted, so that correct transceiving of each module of the system can be ensured, the influence of transmission time delay of the system on a synchronizing signal is minimized, each module of the system can receive the synchronizing signal and staggered parallel connection of the system is realized truly. When a plurality of power supply modules run in parallel, output total current can reach thousands accuracy effect, the size of a filtering device is reduced and transient response characteristic of the system is enhanced.

Description

technical field [0001] The invention relates to a staggered parallel high-stability modular DC steady-current power supply system, which belongs to the field of current conversion technology in the electric power industry. Background technique [0002] Switching power supply is being used more and more in various fields of national production due to its many remarkable advantages. Program-controlled switches, communications, control equipment power supplies, etc. have widely used switching power supply, which has further promoted the rapid development of switching power supply technology. develop. As a kind of switching power supply, the steady-current power supply is also a standing power supply for electrical equipment. The steady-current power supply of electronic testing equipment has high requirements for reliability, stability, and power supply efficiency. At the same time, the output current ripple is also required to be as small as possible. Because The circuit inte...

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Problems solved by technology

[0005] For each power module unit participating in parallel operation, synchronous operation or interleaved operation control method can be adopted. Since the total output current ripple of the synchronous operation system is the synchronous superposition of the output current ripple of each module, it is not conducive to filtering. Therefore, more parallel systems The interleaved operation mode is adopted, the power switching devices of each unit in the circuit work in a sequential manner, the frequency of the driving signal is consistent, the phase angles are staggered and turned on alternately, and it has the advantages of suppressing output current ripple, reducing output filter capacity and expanding system power output , but in the traditional synchronization technology, each module works in a state of receiving the synchronization signal in an open loop, and there is no detection system whether each module receives the synchronization signal or a delay device during the transmission of the synchronization signal, so it cannot ensure that each module of the system Accuracy of delay phase angle and signal integrity of received interleaved interconnect signals

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