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

Method and device for optimizing thyristor and resistance-capacitance parameters of converter valve

An optimization method and converter valve technology, applied in emergency protection circuit devices, electrical components, etc., can solve the problems of weak pressure resistance and high loss of large-capacity converter valves, and achieve safe and reliable operation, loss optimization, and improvement. The effect of reliability

Active Publication Date: 2019-09-27
GLOBAL ENERGY INTERCONNECTION RES INST CO LTD +1
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Therefore, the present invention provides a converter valve thyristor and a resistance-capacitance parameter optimization method and device, which solves the problems of weak pressure resistance and high loss of the large-capacity converter valve, and finally realizes the control of the electrical stress and thermal stress of the converter valve. Optimization improves the reliability of key components and ensures the safe and reliable operation of the converter valve to meet the increasing demand for power transmission capacity

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
  • Method and device for optimizing thyristor and resistance-capacitance parameters of converter valve
  • Method and device for optimizing thyristor and resistance-capacitance parameters of converter valve
  • Method and device for optimizing thyristor and resistance-capacitance parameters of converter valve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The embodiment of the present invention provides a converter valve thyristor and a resistance-capacitance parameter optimization method, such as figure 1 shown, including the following steps:

[0032] Step S1: Determine the key influencing parameters of the converter valve loss and overshoot voltage. The key influencing parameters include: the on-state voltage drop of the converter valve, the reverse recovery charge, the damping capacitance and the damping resistance.

[0033] In practical applications, the converter valve is composed of multiple components, and each component will generate losses during operation, among which the thyristor loss and the resistance-capacitance loop loss account for a large proportion of the total loss, reaching about 90%. Therefore, the loss of the thyristor and the loss of the resistance-capacitance loop are mainly considered when optimizing the loss.

[0034] Wherein, the thyristor loss includes on-state loss and turn-off loss. In one...

Embodiment 2

[0062] An embodiment of the present invention provides a converter valve thyristor and a resistance-capacitance parameter optimization device, such as Figure 6 shown, including:

[0063] The key influencing parameter determination module 1 is used to determine the key influencing parameters of the converter valve loss and overshoot voltage, the key influencing parameters include: the on-state voltage drop of the converter valve, the reverse recovery charge, the damping capacitance and the damping resistance. In practice, the converter valve is composed of multiple components, and each component will generate losses during operation, among which the loss of the thyristor and the loss of the resistance-capacitance circuit account for a large proportion of the total loss, reaching about 90%. Therefore, only the thyristor loss and the resistance-capacitance circuit loss should be considered when optimizing the loss. According to the above loss formula (1), formula (2) and formul...

Embodiment 3

[0067] An embodiment of the present invention provides a non-transitory computer-readable storage medium, on which a computer-executable instruction is stored on the computer-executable instruction, and the computer-executable instruction can execute the converter valve thyristor and the resistance-capacitance parameter in Embodiment 1 Optimization. Wherein, the storage medium may be a magnetic disk, an optical disk, a read-only memory (Read-Only Memory, ROM), a random access memory (Random Access Memory, RAM), a flash memory (Flash Memory), a hard disk (HardDisk Drive, Abbreviation: HDD) or solid-state drive (Solid-State Drive, SSD), etc.; the storage medium may also include a combination of the above-mentioned types of storage.

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 discloses a converter valve thyristor and a resistance-capacitance parameter optimization method and device. The method comprises: loss and overshoot voltage key influence parameters ofa converter valve are determined, wherein the key influence parameters include an on-state voltage drop of the converter valve, a reverse recovery charge, a damping capacitance value and a damping resistance value; on the basis of a hyperbolic secant function model, a thyristor reverse recovery current model is established, and turn-off loss and overshoot voltage values are calculated based on thekey influence parameters according to the thyristor reverse recovery current model; and a corresponding optimized parameter value on the condition of the minimum total loss of the converter valve isdetermined on the boundary condition that the overshoot voltage of the converter valve does not exceed a preset voltage threshold. According to the invention, a matching relationship between the thyristor and the resistance-capacitance parameters is considered comprehensively from the global perspective; the converter valve multi-parameter global optimization method for converter valve reverse overshoot voltage and loss optimization is realized; the reliability of the key components is improved; and the safe and reliable operation of the converter valve is ensured.

Description

technical field [0001] The invention relates to the field of electrical design of DC transmission converter valves in power electronics, in particular to a converter valve thyristor and a resistance-capacitance parameter optimization method and device. Background technique [0002] my country has a vast territory, and the distribution of power generation energy and power load is extremely uneven. This objective reality determines the inevitability of large-scale cross-regional flow of electricity in my country. UHV DC transmission is currently the only advanced transmission technology that can efficiently transmit 10,000-megawatt-level electric energy to a distance of 2,000 kilometers. With the increase of DC transmission capacity, the electrical stress and thermal stress of the converter valve of the core equipment will increase, which will bring new challenges to the design and operation of the converter valve. [0003] When the valve is switched off, the topology of the ...

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
Patent Type & Authority Patents(China)
IPC IPC(8): H02H7/12
Inventor 张静盛财旺查鲲鹏周建辉张娟娟
Owner GLOBAL ENERGY INTERCONNECTION RES INST CO LTD