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Decentralized droop control method for isop modular dc-dc converter

A DC-DC and control method technology, applied in the field of decentralized droop control, can solve the problems of large fluctuation range of output voltage amplitude and instability of ISOP converter, etc., so as to improve dynamic performance, avoid system paralysis, and improve flexibility Effect

Active Publication Date: 2016-10-05
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

And the output voltage will be affected by the input voltage, and the output regulation characteristics will also be affected by the input voltage of each module, especially when the total input voltage adjustment range is very wide, the output voltage amplitude fluctuation range is large
Furthermore, conventional droop control is not stable for ISOP converters

Method used

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Embodiment Construction

[0031] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0032] The invention relates to a decentralized droop control method for an ISOP modularized DC-DC converter.

[0033] For the ISOP modular DC-DC converter system, it consists of n DC-DC converters, such as figure 1 shown, v in is the total input voltage, v ini (i=1,2...n) is the input voltage of module #i (i=1,2...n), i in is the total input current, i ini (i=1,2...n) is the input current of module #i (i=1,2...n), i Lfi (i=1,2...n) is the output current of module #i (i=1,2...n), i Lf is the total output current of the ISOP system, v o is the total output voltage of the ISOP system. The schematic diagram of the decentralized droop control method of the ISOP modular DC-DC converter is shown in figure 2 shown.

[0034] The present invention's proposed method and its circuit topology work process are as follows:

[0035] After the converter is...

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Abstract

Disclosed is a decentralized droop control method for an ISOP modular DC-DC converter. The invention relates to a research on a double-closed-loop control method for an ISOP modular DC-DC converter based on droop characteristics, and belongs to the field of power electronics. By sampling the current on the output side, the system is controlled for droop compensation, and then through the double closed loop of voltage and current, the individual control of each module is realized, and the power sharing between modules is realized at the same time. ISOP modular DC‑DC converters consist of multiple DC‑DC converters. By adopting this method, not only the distributed control of the system can be realized, but also the power sharing of the modules can be well realized, and it has a high dynamic response speed. At the same time, compared with the traditional droop method, the droop control method realizes the stability of the system from the mechanism.

Description

technical field [0001] The patent of the present invention provides a decentralized droop control method for an ISOP (Input-Series-Output-Series, input-series-output-parallel) modular DC-DC converter, which belongs to the direction of high-frequency switching power supply in the field of power electronics. Background technique [0002] Modular converters have the advantages of redundant operation capability, standardized modular operation and flexibility of power expansion. Among them, the ISOP modular system can make switches with lower rated voltages applied to high input voltage and low output voltage high current occasions. In order to make the combined DC-DC converter work normally, it is necessary to realize power sharing among modules (including input voltage sharing and output current sharing). [0003] For ISOP modular DC-DC converters, the current main control methods are divided into the following two categories: (1) centralized control, (2) decentralized control...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/04
CPCH02M3/04H02M1/0016
Inventor 沙德尚刘弘耀陈泓宇袁文琦许国
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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