Unlock instant, AI-driven research and patent intelligence for your innovation.

Modular multilevel converter module circuit capable of eliminating DC fault

A modular multi-level, DC fault technology, applied in the direction of conversion equipment without intermediate conversion to AC, electrical components, output power conversion devices, etc., can solve high cost, large conduction loss, and large forward voltage drop And other issues

Inactive Publication Date: 2016-04-13
BEIJING SIFANG JIBAO AUTOMATION +1
View PDF3 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of CDSM are: 1) the voltage and current capacity of the protection IGBT and the corresponding clamping diode are the same as those of the main power device, and the cost is high; , large conduction loss

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 more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Modular multilevel converter module circuit capable of eliminating DC fault

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0008] The modularized multi-level converter module circuit with DC fault clearing proposed by the present invention includes a first DC capacitor C1, a second DC capacitor C2, a first semiconductor switch S1, a second semiconductor switch S2, a third semiconductor switch S3, The fourth semiconductor switch S4, the fifth semiconductor switch S5, the first protection thyristor S6, the second protection thyristor S7, the third protection thyristor S8, the first freewheeling diode D1, the second freewheeling diode D2, The third freewheeling diode D3, the fourth freewheeling diode D4, the fifth freewheeling diode D5, the sixth freewheeling diode D6, the resistance-capacitance absorption circuit CS / RS, the equalizing resistor RJ, the first charging diode D9, the second charging Diode D10, first current limiting resistor RL1 and second current limiting resistor RL2;

[0009] The collectors of the first semiconductor switch S1, the second semiconductor switch S2, the third semiconduc...

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

No PUM Login to View More

Abstract

The invention relates to a modular multilevel converter module circuit capable of eliminating a DC fault, belonging to the field of an electrical automation device. The modular multilevel converter module circuit comprises a first DC capacitor, a second DC capacitor, a first semiconductor switch, a second semiconductor switch, a third semiconductor switch, a fourth semiconductor switch, a fifth semiconductor switch, a first protective silicon controlled rectifier, a second protective silicon controlled rectifier, a third protective silicon controlled rectifier, a first flywheel diode, a second flywheel diode, a third flywheel diode, a fourth flywheel diode, a fifth flywheel diode, a sixth flywheel diode, a resistance-capacitance absorption circuit, an equalizing resistor, a first charging diode, a second charging diode, a first current limiting resistor and a second current limiting resistor. With the modular multilevel converter module circuit capable of eliminating the DC fault, the DC short-circuit current can be eliminated by using the silicon controlled rectifiers with relatively low cost, and the total cost and the running loss of a converter are reduced; and the modular multilevel converter module circuit capable of eliminating the DC fault, provided by the invention, can be applied to voltage source converter based high voltage direct current (VSC-HVDC), a static synchronous compensator (STATCOM) and the like.

Description

technical field [0001] The invention relates to a modularized multilevel converter module circuit with DC fault clearing, which belongs to the field of electrical automation equipment. Background technique [0002] When the modular multi-level voltage source converter realizes the overhead line DC transmission, it needs to solve the protection problem of the DC side short circuit. At present, the commonly used methods are: 1) Modular multi-level power module (MMC power module) bridge arm lower tube anti-parallel thyristor, use the thyristor to withstand a large short-circuit current, and wait for the AC side switch to trip; 2 ) uses the protection IGBT in the clamped dual sub-module (CDSM) to realize the fast turn-off of the DC short-circuit current. The disadvantages of CDSM are: 1) The voltage and current capacity of the protection IGBT and the corresponding clamping diode is the same as that of the main power device, and the cost is high; , the conduction loss is large....

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
no application Login to View More
IPC IPC(8): H02M3/07H02M1/34
CPCH02M1/34H02M3/07H02M1/348
Inventor 刘文华刘志超刘树
Owner BEIJING SIFANG JIBAO AUTOMATION