Voltage loading method for inhibiting from starting instantaneous current rush and device thereof

A technology of instantaneous current and loading device, applied in the field of power system, can solve problems such as large current impact of the system, and achieve the effect of reducing the impact current and easy to achieve

Inactive Publication Date: 2010-03-03
SENYUAN DONGBIAO ELECTRIC CO LTD
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  • Application Information

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Problems solved by technology

[0008] The invention provides a voltage loading method and device for suppressing the current impact at the start-up moment, which is used in the current-voltage double-closed-loop control system adopted by wind power generation inverter grid-connected to solve the problem of large current at the start-up moment of the system in the prior art shock problem

Method used

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  • Voltage loading method for inhibiting from starting instantaneous current rush and device thereof
  • Voltage loading method for inhibiting from starting instantaneous current rush and device thereof
  • Voltage loading method for inhibiting from starting instantaneous current rush and device thereof

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Embodiment Construction

[0030] In order to solve the problem in the prior art that the system has a large current impact at the moment of starting, the present invention adopts the initial value of the bus voltage by changing the voltage control loop and the current control loop Proportion Integration Differentiation (PID) integral term The initial value method has achieved good results.

[0031] like figure 2 The flow chart of the voltage loading method for suppressing the instantaneous current impact of starting is shown in the present invention, which is used to change the initial value of the given bus voltage of the voltage control loop. The implementation process is described below:

[0032] Step 21, setting the initial voltage loading value and the final voltage loading value of the bus;

[0033] Step 22, performing voltage loading on the bus bar according to the initial voltage loading value;

[0034] Step 23, the voltage loading value of the bus load is U dc After the bus voltage smoothl...

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Abstract

The invention discloses a voltage loading method for inhibiting from starting instantaneous current rush and a device thereof. The method comprises the steps of: setting a voltage initial loading value and a voltage final loading value of a buss; loading voltage to the buss according to the voltage initial loading value; and stopping loading voltage to the buss after the voltage loading value of the buss is smoothly changed into the voltage final loading value from the voltage initial loading value. The device comprises a voltage loading value setting module for setting the voltage initial loading value and the voltage final loading value of the buss; a voltage loading module which is connected with the voltage loading value setting module for loading voltage to the buss according to the voltage initial loading value; and a voltage loading stopping module which is connected with the voltage loading module for stopping loading voltage to the buss after the voltage loading value of the buss is smoothly changed into the voltage final loading value from the voltage initial loading value. The invention can inhibit from starting the instantaneous current rush.

Description

technical field [0001] The invention relates to a power system, in particular to a voltage loading method and device for suppressing the instantaneous current impact at start-up in a current-voltage double closed-loop control system used in wind power generation inverter grid-connected. Background technique [0002] At present, the wind power inverter grid-connected technology adopts the current and voltage double closed-loop control system, that is, the control adopts the current inner loop and the voltage outer loop double closed-loop vector control technology. The voltage outer loop mainly controls the DC side voltage of the three-phase voltage rectifier (VSR) to stabilize at a specified value, and the current inner loop controls the active and reactive current according to the current command output by the voltage outer loop. In the synchronous rotation (d, q) shaft system The lower current controller tracks the reference current to generate a suitable reference voltage....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/24H02J3/38
Inventor 周继华杨凤山刘宏伟
Owner SENYUAN DONGBIAO ELECTRIC CO LTD
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