A secondary circuit topology and method of a power unit supporting automatic detection
A power unit and automatic detection technology, which is applied in the direction of output power conversion device, AC power input conversion to DC power output, power supply test, etc., can solve the problems of power unit batch detection and maintenance difficulties, so as to ensure safety and improve The effect of detection efficiency
Active Publication Date: 2022-03-11
GUANGZHOU BUREAU CSG EHV POWER TRANSMISSION
View PDF8 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0005] In order to solve the problem of difficult batch detection and maintenance of the above-mentioned power units, and to ensure the efficiency and safety of maintenance, the present invention proposes a power unit secondary circuit topology that supports automatic detection. This topology supports the power unit when the valve tower is powered off. Batch inspection can test the communication between the converter valve and the valve control, and the inspection is carried out under low pressure. During the inspection, workers can go on the valve at any time
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
[0027] The specific embodiments provided by the present invention will be described in detail below in conjunction with the accompanying drawings.
[0028] Such as figure 1 As shown, the schematic diagram of the full-bridge power unit is composed of upper tubes T1, T2, lower tubes T3, T4, and capacitor C. The secondary circuit topology of the power unit that supports automatic detection is composed of two parts: the energy harvesting control part and the 4 IGBT drivers. .
[0029] The secondary IGBT driving circuit of the power unit is equipped with a driving board for each power switching element (IGBT): the IGBT driving board H1 can trigger the on and off of T1, and feed back the working state of T1 through the optical fiber; similarly, the IGBT The driver board L1 can trigger the on-off of T3 and feedback the working status of T3; the IGBT driver board H2 can trigger the on-off of T2 and feedback the working status of T2; the IGBT driver board L2 can trigger the on-off of ...
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 power unit secondary circuit topology and method supporting automatic detection. The circuit topology includes an energy-taking control part and four IGBT drive parts; the four IGBT drive parts are the first upper transistor T1 and the The second upper tube T2, the first lower tube T3, and the second lower tube T4 are each equipped with a drive board: the energy acquisition control part includes an energy acquisition power supply part, a rechargeable battery, an external power supply interface, AD sampling, a control logic part, Wireless module and unit sensor interface; suitable for occasions where power unit power-down batch maintenance is required, especially for flexible direct current transmission and other occasions where there are a large number of power units and it is inconvenient to disassemble the power units. This topology supports batch detection of power units when the valve tower is powered off. It can test the communication between the converter valve and the valve control, and the detection is carried out under low pressure. During the detection, workers can access the valve at any time. While improving the detection efficiency, the safety of maintenance personnel is guaranteed.
Description
technical field [0001] The invention relates to the technical field of flexible direct current transmission, in particular to a power unit secondary circuit topology and method supporting automatic detection. Background technique [0002] Modular multilevel converter valves are widely used in engineering fields such as flexible direct current transmission and static var compensation. In recent years, with the continuous commissioning of projects, the number of projects requiring maintenance and repair has continued to increase. One of the characteristics of the modular multi-level converter valve is that the power unit sub-module is the smallest controllable unit, and the valve tower is formed by cascading many power units, and then the converter valve is formed. Therefore, for the converter valve, the focus of maintenance and repair is on the power unit. [0003] In the current project put into operation, the power unit is mainly composed of capacitors, power devices (IGBT...
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 Patents(China)
IPC IPC(8): H02M7/5387G01R31/42
CPCH02M7/5387G01R31/42
Inventor 严治勇梁家豪杨学广陶敏焦石赖桂森梁梓贤吕茵徐涵陈明洁张磊
Owner GUANGZHOU BUREAU CSG EHV POWER TRANSMISSION