Method for controlling parallel operation of current transformer

A control method and converter technology, which is applied in the direction of single-network parallel feeding arrangement, etc., can solve the problems that the converter cannot share the current, the load voltage adjustment rate increases, etc.
CN100440681CInactive Publication Date: 2008-12-03ABLEREX ELECTRONICS CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
ABLEREX ELECTRONICS CO LTD
Publication Date
2008-12-03
Estimated Expiration
Not applicable · inactive patent

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Abstract

This invention discloses a control method for current transformer parallel operation in which, its control loop includes a voltage feed-back circuit and a current supply circuit and the said first one includes a regulation control circuit and a wave control circuit, the said regulation control circuit provides a load voltage amplitude at a certain value, the wave control circuit improves the general harmonic distortion rate of the output voltage, the said current supply circuit takes out the output current of the transformer to divide it into a basic wave and harmonic wave then to be amplified and the basic wave is taken as the damp between the current transformers and the amplified harmonic as the damp of the output filter.
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Description

technical field

[0001] The invention relates to a control method of a converter, in particular to a control method for the parallel operation of the converters, so as to reduce the circulating current among the converters and reduce the total harmonic distortion rate of the output voltage under nonlinear load. Background technique

[0002] In order to provide high-capacity and high-quality AC power, a single large-capacity converter (inverter) or multiple small-capacity converters can be connected in parallel. Considering the scalability and reliability of the system, the parallel operation of multiple small-capacity converters is better than the single operation of a single large-capacity converter.

[0003] However, the main problem of parallel operation of converters lies in the distribution of load current. Overloading of individual converters caused by uneven distribution of load current should be avoided; Losses increase, reducing overall converter efficiency and poss...

Claims

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