Method for detecting fault of high-voltage frequency inverter before power on
A high-voltage frequency conversion and fault detection technology, applied in the direction of measuring devices, measuring electricity, measuring electrical variables, etc., can solve problems such as danger, and achieve the effect of reducing hazards and reducing the impact of high-voltage power-on
Active Publication Date: 2015-04-08
SHANGHAI POWER EQUIP RES INST
View PDF4 Cites 1 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0003] If the high-voltage frequency conversion device fails, it is very dangerous to directly power on the input side through the high-voltage power supply
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0017] In order to make the present invention more comprehensible, preferred embodiments are described in detail below with accompanying drawings.
[0018] to combine figure 1 , a kind of fault detection method before power-on of the high-voltage frequency conversion device provided by the present invention, its steps are:
[0019] The first step is to disconnect the high-voltage switch 21 used to connect the high-voltage power supply 1 and the transformer one 22;
[0020] In the second step, the low-voltage power supply 3 passes through the transformer 2 4 to send power back to the transformer 1 22 from the low-voltage winding of the transformer 22, and there will be voltage in the other windings of the transformer 22, so that the high-voltage frequency conversion system 23 can be operated at high voltage. DC voltage is obtained under the condition of electricity;
[0021] The third step is to perform a performance test on the high-voltage frequency conversion system 23 to ...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention provides a method for detecting a fault of a high-voltage frequency inverter before power on and also provides another technical scheme for reducing the impact caused by direct high-voltage power on of a high-voltage frequency converting system. According to the method disclosed by the invention, low-voltage power supply is inputted; a high current signal is obtained by a low-voltage side according to principle of conservation of energy so as to conveniently monitor tiny current changes at a high-voltage side / immediate-voltage side of the system by a current monitoring device, so that a fault existing in the high-voltage frequency inverter can be reflected. The method disclosed by the invention has the advantages of reducing the harms caused by direct high-voltage power on when the high-voltage frequency inverter has a fault, and inspecting the control performance of the high-voltage frequency inverting system when no high voltage exists. Besides, the invention also provides a method for reducing the impact caused by high-voltage power-on of the high-voltage frequency inverter.
Description
technical field [0001] The invention relates to a fault detection method for a high-voltage frequency conversion device before power-on, and belongs to the technical field of power electronics and high-voltage frequency conversion. Background technique [0002] With the development of power electronics technology and the in-depth research of high-voltage frequency conversion technology, the application of high-voltage frequency conversion devices is becoming more and more extensive, and the capacity of high-voltage frequency conversion devices is increasing, which has a higher and higher impact on the stability of the application system. [0003] If the high-voltage frequency conversion device fails, it is very dangerous to directly power on the input side through the high-voltage power supply. If the fault detection of the high-voltage frequency conversion device can be carried out before power-on, the impact caused by the fault of the high-voltage frequency conversion devi...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/00
Inventor 逯乾鹏赵莉应文珺唐小亮洪涛
Owner SHANGHAI POWER EQUIP RES INST