CN205657582U - LLCL type bank electricity variable frequency power supply shipboard filter circuit - Google Patents
LLCL type bank electricity variable frequency power supply shipboard filter circuit Download PDFInfo
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- CN205657582U CN205657582U CN201620357208.3U CN201620357208U CN205657582U CN 205657582 U CN205657582 U CN 205657582U CN 201620357208 U CN201620357208 U CN 201620357208U CN 205657582 U CN205657582 U CN 205657582U
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Abstract
The utility model discloses a LLCL type bank electricity variable frequency power supply shipboard filter circuit in the boats and ships power supply field, connect the net side wave filter at the harbour electric wire netting including the input, the output of net side wave filter links to each other with the input of shipboard dc -to -ac converter through steady voltage electric capacity C4, the output of shipboard dc -to -ac converter links to each other with filter circuit's input, filter circuit's output is the end that charges, the utility model discloses can eliminate the specific subharmonic of bank electricity variable frequency power supply output, reduce bank electricity variable frequency power supply's output harmonic content, improve the boats and ships load power supply electric energy quality that inserts the bank electricity, can be used to during the harbour boats and ships charge.
Description
Technical field
This utility model relates to a kind of variable-frequency power sources, particularly to a kind of variable-frequency power sources filter circuit.
Background technology
Along with national economy sustained and rapid development, the paces of port construction are increasingly faster, in the most global ten Ports, have eight harbours in China, and China becomes the first in the world harbour big country free from controversy.Increase day by day along with China's ports container quantity, the quantity and the density that rest in the overseas boats and ships of harbour are significantly increased, the boats and ships lay day that pulls in shore consumes great amount of fuel oil, and produces substantial amounts of waste gas and granular material discharged, thus the atmospheric environment near harbour is created serious pollution.Boats and ships connect with shore electric power as a technology that can effectively reduce port contaminant discharge, increasingly come into one's own, but the overseas ship power supply berthed due to major port mostly is 60Hz, the frequency of supply 50Hz current with China does not mates, and therefore needs in shore electric power to configure variable-frequency power sources to realize the power supply to different frequency boats and ships.
Owing to there being substantial amounts of household electricity load on boats and ships, power quality is required higher, therefore need to control the output harmonic wave of bank electricity variable-frequency power sources, improve its output quality of power supply, it is ensured that boats and ships load safe and stable operation.Bank electricity variable-frequency power sources filter circuit many employings capacitor filtering branch road at present, this branch road can filter high-frequency harmonic, but it is more weak for specific subharmonic damping capacity, filter effect especially for heavier low order such as 3/5/7 subharmonic of harmonic content is limited, the power supply quality causing shore electric power is difficult to meet the quality of power supply requirement of current various life load, have impact on the service life of boats and ships load.
Utility model content
The purpose of this utility model is to provide a kind of LLCL type bank electricity variable-frequency power sources shipboard filter circuit, can effectively reduce the output harmonic wave content of shore electric power system, improves the power quality of shore electric power system.
The purpose of this utility model is achieved in that a kind of LLCL type bank electricity variable-frequency power sources shipboard filter circuit, the net side filter of harbour distribution network it is connected to including input, the outfan of described net side filter is connected through the input of electric capacity of voltage regulation with shipboard inverter, the described outfan of shipboard inverter is connected with the input of filter circuit, and the outfan of described filter circuit is charging end；
Described shipboard inverter is made up of the first power tube, the second power tube, the 3rd power tube, the 4th power tube, the 5th power tube and the 6th power tube, first power tube, the 3rd power tube, the 5th upper brachium pontis of power tube composition, second power tube, the 4th power tube, the 6th power tube lower brachium pontis of composition, wherein as A circuitry phase after the first power tube, the second power tube series connection, as B circuitry phase after 3rd power tube, the 4th power tube series connection, as C circuitry phase after 5th power tube, the 6th power tube series connection, above-mentioned three-phase circuit is connected in parallel；
Described filter circuit includes two groups of filter reactance and the isolating transformer being cascaded, first group of filter reactance includes the first inductance of parallel connection, second inductance, 3rd inductance, second group of filter reactance includes the 4th inductance of parallel connection, 5th inductance, 6th inductance, a termination A circuitry phase after described first inductance and the series connection of the 4th inductance, another terminates isolating transformer input, a termination B circuitry phase after second inductance and the series connection of the 5th inductance, another terminates isolating transformer input, a termination C circuitry phase after 3rd inductance and the series connection of the 6th inductance, another terminates isolating transformer input, the outfan of described isolating transformer is charging end.
Compared with prior art, the beneficial effects of the utility model are, this utility model can eliminate the specific subharmonic of bank electricity variable-frequency power sources output, reduce the output harmonic wave content of bank electricity variable-frequency power sources, improve the boats and ships load power quality accessing bank electricity.This utility model can be used in yard craft charging.
In order to improve ship load power quality further, between described two groups of filter reactance, side connects shipboard filter branch, described shipboard filter branch is formed by connecting through delta connection by three-phase branch road, every phase branch structure is identical, and an every resistance of route series connection, an inductance and electric capacity of propping up mutually forms.It primarily serves the effect filtering specific subharmonic.
As further restriction of the present utility model, described isolating transformer is Y/D star delta-connection.It primarily serves the effect filtering triple-frequency harmonics.
Accompanying drawing explanation
Fig. 1 is this utility model major loop schematic diagram.
Fig. 2 is shipboard filter branch schematic diagram in this utility model.
Detailed description of the invention
A kind of LLCL type bank electricity variable-frequency power sources shipboard filter circuit as shown in Figure 1-2, the net side filter of harbour distribution network it is connected to including input, the outfan of net side filter is connected through the input of electric capacity of voltage regulation C4 with shipboard inverter, the outfan of shipboard inverter is connected with the input of filter circuit, and the outfan of filter circuit is charging end；
Shipboard inverter is by the first power tube G1, second power tube G2, 3rd power tube G3, 4th power tube G4, 5th power tube G5 and the 6th power tube G6 composition, first power tube G1, 3rd power tube G3, brachium pontis on 5th power tube G5 composition, second power tube G2, 4th power tube G4, , the 6th lower brachium pontis of power tube G6 composition, wherein the first power tube G1, as A circuitry phase after second power tube G2 series connection, 3rd power tube G3, as B circuitry phase after 4th power tube G4 series connection, 5th power tube G5, as C circuitry phase after 6th power tube G6 series connection, above-mentioned three-phase circuit is connected in parallel；
Filter circuit includes two groups of filter reactance and the isolating transformer T1 being cascaded, first group of filter reactance includes the first inductance L1 of parallel connection, second inductance L2, 3rd inductance L3, second group of filter reactance includes the 4th inductance L4 of parallel connection, 5th inductance L5, 6th inductance L6, a termination A circuitry phase after first inductance L1 and the 4th inductance L4 series connection, another terminates isolating transformer T1 input, a termination B circuitry phase after second inductance L2 and the 5th inductance L5 series connection, another terminates isolating transformer T1 input, a termination C circuitry phase after 3rd inductance L3 and the 6th inductance L6 series connection, another terminates isolating transformer T1 input, the outfan of isolating transformer is charging end；
Between two groups of filter reactance, side connects shipboard filter branch, shipboard filter branch is formed by connecting through delta connection by three-phase branch road, every phase branch structure is identical, three-phase branch road is made up of the resistance R1 connected, R2, R3, inductance L7, L8, a L9 and electric capacity C1, C2, a C3 respectively, and isolating transformer T1 is Y/D star delta-connection.
It is sinusoidal wave effect that two groups of filter reactance primarily serve pulse square wave filter, and shipboard filter branch primarily serves the effect filtering specific subharmonic, and isolating transformer T1 is Y/D star delta-connection, primarily serves the effect filtering triple-frequency harmonics.
This utility model is not limited to above-described embodiment; on the basis of technical scheme disclosed in this utility model; those skilled in the art is according to disclosed technology contents; need not performing creative labour and some of which technical characteristic just can be made some replacements and deformation, these are replaced and deformation is all in protection domain of the present utility model.
Claims (3)
1. a LLCL type bank electricity variable-frequency power sources shipboard filter circuit, it is characterized in that, the net side filter of harbour distribution network it is connected to including input, the outfan of described net side filter is connected with the input of shipboard inverter through electric capacity of voltage regulation (C4), the described outfan of shipboard inverter is connected with the input of filter circuit, and the outfan of described filter circuit is charging end；
Described shipboard inverter is by the first power tube (G1), second power tube (G2), 3rd power tube (G3), 4th power tube (G4), 5th power tube (G5) and the 6th power tube (G6) composition, first power tube (G1), 3rd power tube (G3), brachium pontis on 5th power tube (G5) composition, second power tube (G2), 4th power tube (G4), the 6th lower brachium pontis of power tube (G6) composition, wherein the first power tube (G1), as A circuitry phase after second power tube (G2) series connection, 3rd power tube (G3), as B circuitry phase after 4th power tube (G4) series connection, 5th power tube (G5), as C circuitry phase after 6th power tube (G6) series connection, above-mentioned three-phase circuit is connected in parallel；
nullDescribed filter circuit includes two groups of filter reactance and the isolating transformer (T1) being cascaded，First group of filter reactance includes first inductance (L1) of parallel connection、Second inductance (L2)、3rd inductance (L3)，Second group of filter reactance includes the 4th inductance (L4) of parallel connection、5th inductance (L5)、6th inductance (L6)，After described first inductance (L1) is connected with the 4th inductance (L4), one terminates A circuitry phase、Another terminates isolating transformer (T1) input，After second inductance (L2) is connected with the 5th inductance (L5), one terminates B circuitry phase、Another terminates isolating transformer (T1) input，After 3rd inductance (L3) is connected with the 6th inductance (L6), one terminates C circuitry phase、Another terminates isolating transformer (T1) input，The outfan of described isolating transformer is charging end.
A kind of LLCL type bank electricity variable-frequency power sources shipboard filter circuit the most according to claim 1, it is characterized in that, between described two groups of filter reactance, side connects shipboard filter branch, described shipboard filter branch is formed by connecting through delta connection by three-phase branch road, every phase branch structure is identical, and an every resistance of route series connection, an inductance and electric capacity of propping up mutually forms.
A kind of LLCL type bank electricity variable-frequency power sources shipboard filter circuit the most according to claim 1 and 2, it is characterised in that described isolating transformer (T1) is Y/D star delta-connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620357208.3U CN205657582U (en) | 2016-04-26 | 2016-04-26 | LLCL type bank electricity variable frequency power supply shipboard filter circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620357208.3U CN205657582U (en) | 2016-04-26 | 2016-04-26 | LLCL type bank electricity variable frequency power supply shipboard filter circuit |
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| CN205657582U true CN205657582U (en) | 2016-10-19 |
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| CN201620357208.3U Active CN205657582U (en) | 2016-04-26 | 2016-04-26 | LLCL type bank electricity variable frequency power supply shipboard filter circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108565860A (en) * | 2018-05-24 | 2018-09-21 | 卧龙电气集团辽宁荣信高科电气有限公司 | A kind of large capacity container bank base variable-frequency power sources output filter |
| CN114221560A (en) * | 2021-11-03 | 2022-03-22 | 中冶南方（武汉）自动化有限公司 | PWM rectifier LLCL filter design structure and method |
-
2016
- 2016-04-26 CN CN201620357208.3U patent/CN205657582U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108565860A (en) * | 2018-05-24 | 2018-09-21 | 卧龙电气集团辽宁荣信高科电气有限公司 | A kind of large capacity container bank base variable-frequency power sources output filter |
| CN114221560A (en) * | 2021-11-03 | 2022-03-22 | 中冶南方（武汉）自动化有限公司 | PWM rectifier LLCL filter design structure and method |
| CN114221560B (en) * | 2021-11-03 | 2023-08-29 | 中冶南方（武汉）自动化有限公司 | PWM rectifier LLCL filter design structure and method |
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