A voltage control method applied to DC converter

A voltage control method and DC converter technology, which are applied in the direction of converting DC power input to DC power output, control/regulation systems, instruments, etc. and other problems to achieve the effect of avoiding overcurrent risk, avoiding abnormal operation and stable output voltage

Inactive Publication Date: 2020-07-03
CORONA WIND EQUIP BEIJING CO LTD +2
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The patent "CN201711391558 DC converter and its method" improves the transient response by generating set signals through logic control and comparison circuits, but it does not have the ability to effectively suppress overcurrent; the patent "CN201810185773 A DC Boost Converter Control Method" combines The driving state of the electric vehicle evaluates the road conditions, and controls the working state of the DC boost converter according to the preset road condition strategy to achieve the purpose of reducing the power consumption of the DC boost converter, but does not consider the transient response of the DC converter

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
  • A voltage control method applied to DC converter
  • A voltage control method applied to DC converter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0019] Apply the DC converter of the present invention such as Figure 1a shown in the non-isolated converter and Figure 1b The high-frequency transformer shown in the isolation type converter has two forms. compared to Figure 1a shown in the non-isolated converter, Figure 1b The high-frequency transformer-isolated converter shown above adds a high-frequency transformer and a rectifier circuit, and is more suitable for applications with high transformation ratios. The voltage control method of the present invention is applicable to Figure 1a and Figure 1b The two structures of the shown DC converters are realized in the control units of the DC converters of the two structures. The input of the control unit is the output voltage U ack and chopped real current I ack , the output is a PWM signal, and the PWM signal is used to control Figu...

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 voltage control method applied to a DC converter, which comprises three links of an output voltage abnormal judgment, an output voltage feedforward control and a voltage-current double closed loop control. Output voltage abnormal judgment judges whether the output voltage is normal or not; The output voltage feedforward control is used to feedforward-control the output voltage when the output voltage is abnormal, and the output voltage is attenuated to zero by the steady-state self-attenuating PID controller with hysteresis loop input when the output voltage is normal. The voltage outer loop in the voltage-current double closed-loop control link is realized based on the conditional PID controller of the output voltage normal signal. When the output voltage is abnormal and the output voltage feedforward control link output contradicts the current loop output trend, the conditional PID controller forces the voltage out. The ring output changes a specific valuein a particular direction. The output voltage feedforward control and the voltage and current double closed loop control result are added together to generate a PWM signal compared with the triangularwave, and the chopper circuit is controlled to reduce the magnitude of the DC voltage change caused by the sudden change of the load.

Description

technical field [0001] The invention relates to a voltage control method applied to a DC converter. Background technique [0002] With the rapid development and wide application of new energy, new materials, information technology and power electronics technology, users' requirements for power demand, power quality and power supply reliability are constantly increasing. The DC distribution network has better performance than the AC distribution network in terms of transmission capacity, controllability and improvement of power supply quality. DC distribution network has gradually begun to be used in building power distribution, ship power and other occasions. [0003] In the DC distribution network, there are inevitably motor-type impact loads and computer-type voltage-sensitive loads. The voltage adjustment rate is an important indicator to measure the power quality of the DC distribution network, that is to say, the DC distribution network must be able to provide a relat...

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 & AuthorityPatents(China)
IPC IPC(8): H02M3/158H02M3/335
CPCH02M3/1584H02M3/33523
Inventor吕佃顺许洪华林资旭张雷王立鹏马强冯莉黄志松孙明丽李海东
OwnerCORONA WIND EQUIP BEIJING CO LTD