Split-phase and voltage-divided cascaded H bridge flexible current limiting device and control method thereof
A current limiting device and cascading technology, applied in circuit devices, emergency protection circuit devices for limiting overcurrent/overvoltage, emergency protection circuit devices, etc. Distortion and other problems, to achieve the effect of improving voltage level, improving safety and reliability, and facilitating expansion
Active Publication Date: 2018-09-14
FUZHOU UNIV
View PDF6 Cites 8 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, in practice, there are certain difficulties in DC charging technology. Self-charging is a relatively simple and feasible method, but it may cause voltage distortion and instantaneous drop.
If the manufacturing process of the reactor cannot be improved, the huge volume will also become an obstacle restricting the commercial development
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 present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0028] Such as figure 1 As shown, a phase-splitting and voltage-dividing cascaded H-bridge flexible current-limiting device, the current-limiting device includes several sub-current-limiting modules connected in series at the busbar end of the grid feeder, and each sub-current-limiting module includes a coupling capacitor, a filter inductor and a stage H-bridge multi-level converter; one end of the coupling capacitor is connected to one end of the filter inductor as an end point of the sub-current limiting module, and the other end of the filter inductor is connected to the cascaded H-bridge multi-level converter The input end of the cascaded H-bridge multilevel converter is connected to the other end of the coupling capacitor as the other end of the sub-current limiting module.
[0029] The number of sub-current-limiting modules and the cascaded numbe...
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 discloses a split-phase and voltage-divided cascaded H bridge flexible current limiting device and a control method thereof. The current limiting device comprises a plurality of sub-current limiting modules connected in series at a busbar end of a grid feeder, wherein each sub-current limiting module comprises a coupling capacitor, a filter inductor and a cascaded H bridge multilevelconverter, one end of the coupling capacitor is connected with one end of the filter inductor and serves as an endpoint of the sub-current limiting module, the other end of the filter inductor is connected with an input end of the cascaded H bridge multilevel converter, and an output end of the cascaded H bridge multilevel converter is connected with the other end of the coupling capacitor and serves as the other endpoint of the sub-current limiting module. Split-phase flexible current limiting control of a short-circuit fault of a grid can be realized.
Description
technical field [0001] The invention relates to the technical field of flexible AC power transmission and distribution, in particular to a phase-splitting and voltage-dividing cascaded H-bridge flexible current limiting device and a control method thereof. Background technique [0002] Traditional flexible current limiters mostly use power electronic devices to quickly input the current-limiting inductance at the moment of failure to achieve the purpose of suppressing short-circuit current. Generally, there are problems such as excessive volume and weight, and harmonic pollution of the power grid. At the same time, the reactor manufacturing process and Power electronic devices have high requirements for voltage and current resistance, and their commercial applications are limited. [0003] Patent CN102035196A "A Fault Current Limiting Device Based on Controllable Series Compensation", the disadvantage of this invention is that when the current limiter enters the current limi...
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 IPC IPC(8): H02H9/02
CPCH02H9/02H02H9/025
Inventor 洪翠杨华锋郭谋发杨耿杰郑峰高伟
Owner FUZHOU UNIV