Power supply power distribution system and method

A technology for power distribution and DC power supply, which is applied to control/regulating systems, electrical components, regulating electrical variables, etc. It can solve the problems of high cost of AC UPS, high loss of transmission lines, large system harmonics, etc., and achieves simple structure, Low cost and low ripple effect

Inactive Publication Date: 2014-01-22
SICHUAN INJET ELECTRIC CO LTD
2 Cites 12 Cited by

AI-Extracted Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to overcome the above-mentioned deficiencies of the prior art, and provide a new power distribution system...
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

Method used

24 pulse wave rectifier circuits 1 comprise two 12 pulse wave axial double split rectifier transformers 3 and four groups of full wave rectifier bridges 4, every 12 pulse wave axial double split rectifier transformer 3 valve side two groups of windings The d-connection and y-connection are respectively connected, and the grid side of the two 12-pulse axial double-split rectifier transformers 3 adopts the extension triangle connection. Due to the special connection between the valve side and the grid side of the rectifier transformer, the current harmonic distortion rate of the grid side of the 24-pulse rectifier circuit 1 is only 6.3%, so there is no need to install harmonic control equipment at the power input end of the electrical equipment, thus The cost of this part of the equipment is reduced, and there is no efficiency loss caused by the harmonic control equipment, and the system efficiency is improved. The ripple of the direct current obtained through the 24-pulse rectification circuit 1 is extremely small, which can greatly reduce the capacitance of the LC filter circuit in the DC/DC power supply 2, thereby reducing costs and improving reliability.
The 24-pulse wave rectifying circuit 1 of the present embodiment combines the distribution transformer and the rectifying circuit separately arranged in the p...
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

Abstract

The invention relates to the power supply field, in particular to a power supply power distribution system and method. The power supply power distribution system comprises a multi-pulse-wave rectification loop and a DC (direct current)/DC power supply installed on electric equipment, wherein the multi-pulse-wave rectification loop comprises a transformer and a full-wave rectification circuit; and the multi-pulse-wave rectification loop is connected with the DC/DC power supply via a direct-current power transmission line. According to the power supply power distribution system and method disclosed by the invention, the problems of high transmission line loss, high alternating current UPS (uninterrupted power supply) configuration cost and big system harmonic wave in the prior art can be solved.

Application Domain

Technology Topic

PhysicsElectricity distribution systems +12

Image

  • Power supply power distribution system and method
  • Power supply power distribution system and method
  • Power supply power distribution system and method

Examples

  • Experimental program(1)

Example Embodiment

[0031] Example 1
[0032] As attached image 3 , Attached Figure 4 , Attached Figure 5 As shown, the power distribution system of this embodiment includes a 24-pulse rectifier circuit 1 and a DC/DC power supply 2 installed on the electrical equipment. The 24-pulse rectifier circuit 1 includes two 12-pulse axial double splits Type rectifier transformer 3 and four sets of full-wave rectifier bridges 4. The 24-pulse rectifier circuit 1 is connected to the DC/DC power supply 2 through a DC transmission line. The DC/DC power supply 2 includes an LC filter circuit, an IGBT inverter circuit, Step-down circuit and diode rectifier filter circuit.
[0033] This embodiment also provides a new power distribution method based on the above-mentioned power distribution system. image 3 As shown, the three-phase 35kV high-voltage power from the power grid is connected to the 24-pulse rectifier circuit 1, and after the step-down rectification in the 24-pulse rectifier circuit 1, the direct current is directly output for use by electrical equipment. As attached Figure 4 As shown, the 24-pulse rectifier circuit 1 includes two 12-pulse axial double-split rectifier transformers 3 and four sets of full-wave rectifier bridges 4, and each 12-pulse axial double-split rectifier transformer 3 has two sets of windings on the valve side. They are connected into d connection and y connection respectively, so that the line voltage naturally forms a phase difference of 30°. The grid sides of the two 12-pulse axial double split rectifier transformers 3 adopt the Yanbian delta connection, and the phase shift is ±7.5. °, the two rectifier transformers have a phase difference of 15° between the line voltage phases of the four sets of valve-side windings. Each winding runs in parallel on the DC side after full-wave rectification.
[0034] The 24-pulse rectifier circuit 1 of this embodiment combines a previously separate distribution transformer and a rectifier circuit. After the 35kV high voltage from the power grid is connected to the 24-pulse rectifier circuit 1, the two 12-pulse axial double The split-type rectifier transformer 3 steps down, and then is rectified by four sets of full-wave rectifier bridges 4 to output DC power for use by electrical equipment. DC transmission reduces the number of transmission cables between power distribution equipment and electrical equipment, and only two A power cable; In addition, by increasing the output voltage of the 24-pulse rectifier circuit 1, under the condition of a certain transmission power, a higher DC output voltage can greatly reduce the current on the transmission cable, thereby reducing the transmission cable The direct benefit brought to the enterprise is that it reduces the amount of metal materials such as copper and aluminum on the transmission line. In addition, there is no AC inductance loss in DC transmission, which can reduce the power loss on the transmission line. Since the power distribution equipment and the electrical equipment adopt the DC route, the backup battery of the corresponding electrical equipment can also be configured as a DC UPS. The DC UPS has a simple structure, small footprint, low cost and high stability.
[0035] The 24-pulse rectifier circuit 1 includes two 12-pulse axial double-split rectifier transformers 3 and four sets of full-wave rectifier bridges 4. Each 12-pulse axial double-split rectifier transformer 3 is connected to two sets of windings on the valve side. d connection and y connection, the grid side of the two 12-pulse axial double split rectifier transformers 3 adopts the Yanbian delta connection. Due to the special connection between the valve side and the grid side of the rectifier transformer, the grid-side current harmonic distortion rate of the 24-pulse rectifier circuit 1 is only 6.3%, so there is no need to install harmonic control equipment at the power input end of the electrical equipment. The cost of this part of the equipment is reduced, and there is no efficiency loss caused by the harmonic control equipment, which improves the system efficiency. The ripple of the DC power obtained by the 24-pulse rectifier circuit 1 is extremely small, which can greatly reduce the capacitance of the LC filter circuit in the DC/DC power supply 2, thereby reducing costs and improving reliability.
[0036]
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

Description & Claims & Application Information

We can also present the details of the Description, Claims and Application information to help users get a comprehensive understanding of the technical details of the patent, such as background art, summary of invention, brief description of drawings, description of embodiments, and other original content. On the other hand, users can also determine the specific scope of protection of the technology through the list of claims; as well as understand the changes in the life cycle of the technology with the presentation of the patent timeline. Login to view more.
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

Similar technology patents

CNC dual-spindle transmission device

ActiveUS20160193669A1Size of machine can be effectivelyReduce sizeMilling machinesFeeding apparatusDual axisPower unit
Owner:BAIZHENG INNOVATION TECHNOLOGY CO LTD

Classification and recommendation of technical efficacy words

  • Reduce size
  • Reduce the cross-sectional area

Novel dosage form

ActiveUS20060024365A1Effectively control release rateReduce sizePill deliveryEster active ingredientsHigh dosesSolubility
Owner:TORRENT PHARMA LTD

Electromagnetic valve

Owner:浙江中宝自控元件有限公司

Catheter

Owner:MEDTRONIC PS MEDICAL
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products