Power-electronic-conversion-device operation-mode ultra high speed switching method

A technology of operation mode and conversion device, which is applied in the direction of single-net parallel feeding arrangement, etc., can solve the problem of long occupation time, achieve the effect of increasing service life, reducing impact and ensuring normal operation

Active Publication Date: 2015-11-11
XUJI GRP +2
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  • Abstract
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Problems solved by technology

[0003] The purpose of the present invention is to provide a method for ultra-high-speed switching of the operating mode of a power electronic conversion device to solve the problem that the existing power electronic conversion device takes too long when switching modes

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  • Power-electronic-conversion-device operation-mode ultra high speed switching method
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  • Power-electronic-conversion-device operation-mode ultra high speed switching method

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Embodiment Construction

[0019] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0020] Such as figure 1 As shown, the power electronic conversion device includes a sampling circuit, a control circuit, a drive circuit and a power unit topology. The sampling circuit collects parameter information on the grid line, and transmits the collected parameter information to the control circuit, and the control circuit performs corresponding control. And output the corresponding control signal, the drive circuit generates the corresponding control PWM wave according to the received control signal, and the power unit topology performs switching action according to the PWM wave, so as to realize the control or conversion of the corresponding mode. When there is a reactive power deficit or harmonic content in the system, the power electronic conversion device can control the power quality of the system in different operating modes, or only transmit po...

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Abstract

The invention relates to a power-electronic-conversion-device operation-mode ultra high speed switching method. A power electronic conversion device possesses N operation modes. In one mode, a given quantity is a given value of a control mode, a feedback quantity is a sum of control superposition quantities of various kinds of the operation modes, and a difference of the given quantity and the feedback quantity is taken as a controlled quantity and control is performed. The control superposition quantities of the various kinds of operation modes are corresponding feedback values of the various kinds of operation modes. The various kinds of operation modes are the various kinds of operation modes which are not inconsistent with the operation mode in the N operation modes. By using the method in the invention, balance adjustment of the mode does not need to be reperformed, and the method can be directly used in a target mode so that the power electronic conversion device can rapidly switch the various kinds of work modes according to a system demand and mode switching time is effectively shortened. Impacts brought by mode switching can be reduced, good operation of the power electronic conversion device is guaranteed and a service life is prolonged. In addition, normal operation of a power grid is guaranteed.

Description

technical field [0001] The invention relates to a method for ultra-high-speed switching of operating modes of a power electronic conversion device, and belongs to the technical field of power quality improvement. Background technique [0002] With the rapid development of distributed power generation and a large number of various power electronic conversion devices connected to the power grid, the dispatching organization puts forward more and higher requirements for the functions of power electronic conversion devices, requiring that different superimposed functions can be realized with the same hardware architecture. For example, functions such as harmonic control, reactive power compensation, grid-connected power generation, and grid-connected charging. The Chinese patent application document with the application number 201410500605.7 discloses a photovoltaic grid-connected inverter with adaptive adjustment of power quality, which automatically adjusts the driving signal ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38
Inventor 李瑞生徐军翟登辉郭宝甫王卫星
Owner XUJI GRP
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