Wind power converter system

A technology of wind power converters and electric converters, which is applied in the direction of wind power generation, single grid parallel feeding arrangement, etc., to achieve the effect of increasing system cost

Active Publication Date: 2020-05-01
SHENZHEN HOPEWIND ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, the purpose of this application is to provide a wind power converter system to solve the current sharing problem in the parallel operation of converters

Method used

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no. 1 example

[0028] Such as figure 1 As shown, the first embodiment of the present application provides a wind power converter system, the wind power converter system includes N wind power converters connected in parallel; each wind power converter includes a machine side connected in series Inductance, machine-side converter, grid-side converter and grid-side inductance, the machine-side inductance is connected to the motor through the machine-side cable, and the grid-side inductance is connected to the box-type transformer through the box-type cable; wherein,

[0029] The number of all machine-side cables of at least one same phase in the N wind power converters is a non-integer multiple of N, and the currents distributed to all machine-side cables of the same phase are equal; and / or,

[0030] The number of all box-changing cables in at least one phase of the N wind power converters is a non-integer multiple of N, and the currents distributed to all box-changing cables in the same phase ...

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Abstract

The invention discloses a wind power converter system. The wind power converter system comprises N wind power converters which are connected in parallel, wherein a wire inlet end of each phase of eachwind power converter is connected with a motor through a machine side cable, a wire outlet end of each phase of each wind power converter is connected with a box-type transformer through a box-type transformer cable, the number of at least one in-phase machine side cable in the N wind power converters is non-integer multiples of N, and the currents distributed to all the in-phase machine side cables are equal; and / or, the number of at least one same-phase box-type substation cable in the N wind power converters is non-integer multiples of N, and the currents distributed to all the same-phasebox-type substation cables are equal. The wind power converter system is advantaged in that the currents distributed to all the machine side cables or all the box transformer substation cables in thesame phase are equal, on one hand, system cost is not increased, on the other hand, that the currents are matched with the corresponding machine powers is guaranteed.

Description

technical field [0001] The present application relates to the technical field of power electronics, in particular to a wind power converter system. Background technique [0002] With the continuous expansion of the capacity of wind turbines, wind power converters are restricted by factors such as power electronic devices, and the capacity of a single converter can no longer meet the actual needs. Therefore, parallel operation of converters has become an inevitable trend. [0003] In actual field application, when the same converters are connected in parallel, each converter needs the same number of cables per phase on the machine side, and the same number of cables per phase on the grid side. However, the number of cables connecting the machine side of the converter to the wind turbine or the grid side to the box-type transformer may not be an integer multiple of the converter. uneven flow. Therefore, the parallel connection of converters needs to increase the number of ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38
CPCY02E10/76
Inventor 孙守旭王琰姜圳周党生
Owner SHENZHEN HOPEWIND ELECTRIC CO LTD
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