CN207460013U - Offshore platform low harmony wave common DC bus converter plant - Google Patents
Offshore platform low harmony wave common DC bus converter plant Download PDFInfo
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- CN207460013U CN207460013U CN201721314706.0U CN201721314706U CN207460013U CN 207460013 U CN207460013 U CN 207460013U CN 201721314706 U CN201721314706 U CN 201721314706U CN 207460013 U CN207460013 U CN 207460013U
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Abstract
The utility model discloses a kind of offshore platform low harmony wave common DC bus converter plants, it includes at least one set of rectifier transformer device, the common DC bus being connected with every group of rectifier transformer device output terminal and at least one inverter module being connected with common DC bus；Every group of rectifier transformer device includes the rectification module for connecting the voltage changing module of external electrical network and being connected with the output terminal of voltage changing module, the output terminal connection common DC bus of rectification module.The utility model can effectively reduce input and output percent harmonic distortion, can make reduction output current ripple, can meet the technology requirement of long distance delivery, effectively reduce the occupied space of platform, and make inversion unit that can exit, start and replace online.
Description
Technical field
The utility model is related to power electronics fields, and in particular to a kind of offshore platform is female with low harmony wave public direct-current
Line converter plant.
Background technology
1140V submersible electric pumps are widely used in the offshore production system of ocean, use two Level Technologies of 1260V at present
Unit frequency converter dragging, there are energy efficiency of equipment is low, long range dragging capabilities are poor, input and output harmonic wave height, to other electricity consumption systems
Crosstalk of uniting is serious, occupies the problems such as platform space is larger.
Utility model content
For above-mentioned deficiency of the prior art, offshore platform provided by the utility model is become with harmonic wave common DC bus
Frequency device solves the problems, such as the unit frequency converters of existing two Level Technologies of 1260V, and at sea platform is low there are energy efficiency of equipment.
In order to reach foregoing invention purpose, the technical solution adopted in the utility model is：
A kind of offshore platform low harmony wave common DC bus converter plant is provided, including at least one set of rectifier transformer dress
Put, the common DC bus that is connected with every group of rectifier transformer device output terminal and be connected with common DC bus to
A few inverter module；Every group of rectifier transformer device includes connecting the voltage changing module of external electrical network and with becoming pressing mold
The rectification module that the output terminal of block is connected, the output terminal connection common DC bus of rectification module.
Further, voltage changing module is phase-shifting transformer.
Further, rectification module is two three-phase full-bridge rectifiers, and two three-phase full-bridge rectifiers connect phase shift respectively
The two-way output of transformer, the busbar of two three-phase full-bridge rectifiers is in parallel and connects common DC bus.
Further, each three-phase full-bridge rectifier includes three diode groups in parallel, and each diode group is wrapped
Two diodes connected according to cathode anode are included, the cathode of each diode group is connected and is used as output node, each two pole
The anode of pipe group is connected and is used as zero curve node.
Further, it is provided with filter capacitor between output node and zero curve node.
Further, each inverter module is composed in series including three groups by four transistors according to emitter collector
The inversion unit that four transistor stack structures are formed in parallel；Wherein, each the first transistor and second transistor junction are set to
Node A, each second transistor and third transistor junction are set to node C and as voltage output end, each 3rd crystal
Pipe and the 4th transistor junction are set to node B, and direct current positive pressure is connected respectively at the both ends of each four transistor stacks structure
Pole and DC voltage cathode, DC voltage electrode connect the collector of each the first transistor, and the connection of DC voltage cathode is each
The emitter of 4th transistor；
Each inverter module is connected with and four transistor stack structures between DC voltage electrode and DC voltage cathode
Series connection the first filter rectification unit and the second filter rectification unit in parallel；First filter rectification unit and the second filter rectification list
Member includes capacitance C1 in parallel, capacitance C2, capacitance C3 and resistance R1, the first filter rectification unit and the second filter rectification unit
Junction be set to node 0；
Parallel circuit, parallel circuit are connected between node A and node B in each four transistor stacks structure
For resistance R and two the first diode VD1 and the second diode VD2 to connect according to cathode anode, the moon of the first diode VD1
Anode the connecting node B, the first diode VD1 of pole connecting node A, the second diode VD2 and the second diode VD2 junctions are set
For node D, node 0 is connected with node D as zero potential end.
Further, transistor is insulated gate bipolar transistor；First diode VD1 and the second diode VD2 are
Fast recovery diode；Resistance R is noninductive high-tension resistive or adjustable resistance.
Further, each inverter module further includes the first voltage sensing for being connected to the first filter rectification unit both ends
Device is connected to the second voltage sensor and temperature protection switch at the second filter rectification unit both ends；First voltage senses
The output terminal of device, second voltage sensor and temperature protection switch is all connected with inverter module protector, inverter module protector
It is arranged in the master control system of common DC bus converter plant.
The beneficial effects of the utility model are：
1st, the rectification module of the utility model uses 12 arteries and veins commutation techniques, and inverter module uses three Level Technologies, and output is adopted
With sine wave filter, reduce input and output harmonic wave, can effectively reduce output current ripple, long distance delivery can be met
Technology requirement；Using common DC bus designing technique, allow when inverter module breaks down, fortune can be exited online
Row, does not have a power failure and carries out maintenance and replace, and does not influence other inversion units, effectively improves the efficiency of equipment.
2nd, the utility model can effectively reduce floor space, save space, reduce weight, can alleviate current platform significantly
The pressure of electric room area, weight etc..
Description of the drawings
Fig. 1 is the structure diagram of the utility model；
Fig. 2 is the schematic diagram that rectifier transformer device connects phase-shifting transformer；
The circuit diagram of Fig. 3 positions rectifier transformer device；
Fig. 4 is the circuit diagram of inverter module.
Specific embodiment
Specific embodiment of the present utility model is described below, in order to facilitate understanding by those skilled in the art
The utility model, it should be apparent that the utility model is not limited to the scope of specific embodiment, to the common skill of the art
For art personnel, if various change appended claim limit and the spirit and scope of definite the utility model in,
These variations are it will be apparent that all utilize the innovation and creation of the utility model design in the row of protection.
As shown in Figure 1, offshore platform low harmony wave common DC bus converter plant includes at least one set of rectifier transformer
Device, the common DC bus being connected with every group of rectifier transformer device output terminal and is connected with common DC bus
At least one inverter module；Every group of rectifier transformer device includes the voltage changing module and and transformation that connect external electrical network
The rectification module that the output terminal of module is connected, the output terminal connection common DC bus of rectification module.
Voltage changing module is phase-shifting transformer.
As shown in Figures 2 and 3, rectification module is two three-phase full-bridge rectifiers, and two three-phase full-bridge rectifiers connect respectively
The two-way output of phase-shifting transformer is connect, the busbar of two three-phase full-bridge rectifiers is in parallel and connects common DC bus.
Each three-phase full-bridge rectifier includes three diode groups in parallel, and each diode group includes according to cathode
Two diodes of anode series connection, the cathode of each diode group are connected and are used as output node, the anode of each diode group
It is connected and is used as zero curve node.
Filter capacitor is provided between output node and zero curve node.
As shown in figure 4, each inverter module is composed in series including three groups by four transistors according to emitter collector
The inversion unit that is formed in parallel of four transistor stack structures；Wherein, each the first transistor and second transistor junction are set
For node A, each second transistor and third transistor junction are set to node C and as voltage output end, each 3rd crystalline substance
Body pipe and the 4th transistor junction are set to node B, and DC voltage is connected respectively at the both ends of each four transistor stacks structure
Anode and DC voltage cathode, DC voltage electrode connect the collector of each the first transistor, and the connection of DC voltage cathode is every
The emitter of a 4th transistor；Each inverter module is connected with and four crystalline substances between DC voltage electrode and DC voltage cathode
Series connection the first filter rectification unit and the second filter rectification unit of body pipe stacked structure parallel connection；First filter rectification unit and
Two filter rectification units include capacitance C1, capacitance C2, capacitance C3 and resistance R1 in parallel, the first filter rectification unit and second
The junction of filter rectification unit is set to node 0；Between node A and node B in each four transistor stacks structure respectively
Parallel circuit is connected with, parallel circuit is resistance R and two the first diode VD1 according to cathode anode series connection and the two or two pole
Anode the connecting node B, the first diode VD1 of the cathode connecting nodes A, the second diode VD2 of pipe VD2, the first diode VD1
Node D is set to the second diode VD2 junctions, node 0 is connected with node D as zero potential end.
Transistor is insulated gate bipolar transistor；First diode VD1 and the second diode VD2 is two poles of fast recovery
Pipe；Resistance R is noninductive high-tension resistive or adjustable resistance.
Each inverter module further includes the first voltage sensor for being connected to the first filter rectification unit both ends, is connected to the
The second voltage sensor and temperature protection switch at two filter rectification unit both ends；First voltage sensor, second voltage pass
The output terminal of sensor and temperature protection switch is all connected with inverter module protector, and inverter module protector is arranged on public direct-current
In the master control system of busbar converter plant.
When the utility model is used, 1260V power grids carry out voltage transformation, the voltage after conversion through voltage module (12 arteries and veins)
Rectified module rectification is followed by common DC bus, and the rectifier transformer devices that cover access busbar more in parallel.It is public straight
More set inverter modules can be mounted under stream busbar, realize the independent operating of each inverter module.1260V AC networks are by phase shift transformation
Device is transformed to the two-way voltage of 30 degree of phase mutual deviation, then through two three-phase full-bridge rectifier rectifications, dc bus is connected in parallel reality
Existing common bus voltage.
Inverter module uses three Level Technologies and three-phase bridge structure, and busbar voltage is through the first filter rectification unit and second
Filter rectification unit is filtered voltage stabilizing, per phase bridge arm (four transistor stack structures) by 4 insulated gate bipolar transistors
(IGBT) connect, neutral point clamper is carried out by the first diode VD1 and the second diode VD2, it is real using SVPWM modulation algorithms
The three level output of existing phase voltage, the voltage stabilizing of mid-point voltage is realized using neutral balance control algolithm.
First filter rectification unit and the second filter rectification unit are respectively subjected to the voltage of DC bus-bar voltage half, when exhausted
When edge grid bipolar transistor (IGBT) 1 and insulated gate bipolar transistor (IGBT) 2 turn on, insulated gate bipolar transistor
(IGBT) 3 and 4 two insulated gate bipolar transistors of insulated gate bipolar transistor (IGBT) be off state, C point current potentials
Identical with DC power anode, insulated gate bipolar transistor (IGBT) 3, the series connection of insulated gate bipolar transistor (IGBT) 4 are held
The total voltage received is entire DC bus-bar voltage UDC, A points current potential is also DC power anode current potential when this is, resistance R and insulation
Grid bipolar transistor (IGBT) 3 blocks resistance to form parallel relationship, selects suitable resistance value that resistance R can be made double with insulated gate
Bipolar transistor (IGBT) 3 blocks total resistance value of resistor coupled in parallel much smaller than the blocking electricity of insulated gate bipolar transistor (IGBT) 4
Resistance forces what the voltage that insulated gate bipolar transistor (IGBT) 4 is born was born higher than insulated gate bipolar transistor (IGBT) 3
Voltage raises B points current potential, when B points current potential is higher than one half voltage of dc bus, i.e. during the current potential of D points, and fast recovery diode
VD2 is turned on, and makes B point current potential clampers in D point current potentials, i.e. insulated gate bipolar transistor (IGBT) 4 bears D points and born to DC power supply
Pole tension, that is, half DC bus-bar voltage, insulated gate bipolar transistor (IGBT) 3 bear DC power anode to D point voltages
For half DC bus-bar voltage, which achieves insulated gate bipolar transistor (IGBT) 3, insulated gate bipolar transistors
(IGBT) the pressure under 4 two insulated gate bipolar transistors are static, prevents unbalanced-voltage-division from causing an insulated gate bipolar crystalline substance
Body pipe excessive pressure damages.It can similarly obtain, when insulated gate bipolar transistor (IGBT) 3,4 liang of insulated gate bipolar transistor (IGBT)
The conducting of insulated gate bipolar transistor, insulated gate bipolar transistor (IGBT) 1, insulated gate bipolar transistor (IGBT) 2
During shut-off, resistance R can make the reduction of A points current potential, and fast to recover diode VD1 conductings when down to D point current potentials, A point current potential clampers exist
D point current potentials make 2 two insulated gate bipolar transistor (IGBT) 1, insulated gate bipolar transistor (IGBT) insulated gate bipolars
Transistor respectively bears half DC bus-bar voltage, prevents voltage un-balance from causing wherein one damage.
In conclusion the utility model can effectively reduce input and output percent harmonic distortion, reduction output current ripple can be made,
The technology requirement of long distance delivery can be met, the occupied space of platform is effectively reduced, and make inversion unit that can exit, start online
And replacement.
Claims (8)
1. a kind of offshore platform low harmony wave common DC bus converter plant, it is characterised in that：Become including at least one set of rectification
Pressure device, the common DC bus being connected with rectifier transformer device output terminal described in every group and female with the public direct-current
At least one inverter module that line is connected；Rectifier transformer device described in every group includes the change pressing mold for connecting external electrical network
Block and the rectification module being connected with the output terminal of the voltage changing module, the output terminal of the rectification module connect the public affairs
Common DC bus.
2. offshore platform according to claim 1 low harmony wave common DC bus converter plant, it is characterised in that：It is described
Voltage changing module is phase-shifting transformer.
3. offshore platform according to claim 2 low harmony wave common DC bus converter plant, it is characterised in that：It is described
Rectification module is two three-phase full-bridge rectifiers, and two three-phase full-bridge rectifiers connect the two of the phase-shifting transformer respectively
Road exports, and the busbar of two three-phase full-bridge rectifiers is in parallel and connects common DC bus.
4. offshore platform according to claim 3 low harmony wave common DC bus converter plant, it is characterised in that：Each
The three-phase full-bridge rectifier includes three diode groups in parallel, and each diode group includes according to cathode anode
Two diodes of series connection, the cathode of each diode group are connected and are used as output node, each diode group
Anode is connected and is used as zero curve node.
5. offshore platform according to claim 4 low harmony wave common DC bus converter plant, it is characterised in that：It is described
Filter capacitor is provided between output node and zero curve node.
6. offshore platform according to claim 1 low harmony wave common DC bus converter plant, it is characterised in that：Each
The inverter module includes three groups of four transistor stack structures being composed in series by four transistors according to emitter collector
The inversion unit being formed in parallel；Wherein, each the first transistor and second transistor junction are set to node A, and each second is brilliant
Body pipe and third transistor junction are set to node C and connect as voltage output end, each third transistor and the 4th transistor
The place of connecing is set to node B, and DC voltage electrode and DC voltage cathode are connected respectively at the both ends of each four transistor stacks structure,
DC voltage electrode connects the collector of each the first transistor, and DC voltage cathode connects the transmitting of each 4th transistor
Pole；
Each inverter module is connected with and four transistor stack between DC voltage electrode and DC voltage cathode
Series connection the first filter rectification unit and the second filter rectification unit of structure parallel connection；The first filter rectification unit and the second filter
Ripple rectification unit includes capacitance C1, capacitance C2, capacitance C3 and resistance R1 in parallel, the first filter rectification unit and second
The junction of filter rectification unit is set to node 0；
Parallel circuit, the parallel connection are connected between node A and node B in each four transistor stacks structure
Circuit is resistance R and two the first diode VD1 and the second diode VD2 according to cathode anode series connection, the one or two pole
The cathode of pipe VD1 connects the node A, and the anode of the second diode VD2 connects the node B, first diode
VD1 and the second diode VD2 junctions are set to node D, and the node 0 is connected with node D as zero potential end.
7. offshore platform according to claim 6 low harmony wave common DC bus converter plant, it is characterised in that：It is described
Transistor is insulated gate bipolar transistor；The first diode VD1 and the second diode VD2 is fast recovery diode；
The resistance R is noninductive high-tension resistive or adjustable resistance.
8. offshore platform according to claim 7 low harmony wave common DC bus converter plant, it is characterised in that：Each
The inverter module further includes the first voltage sensor for being connected to the first filter rectification unit both ends, is connected to described
The second voltage sensor and temperature protection switch at two filter rectification unit both ends；The first voltage sensor, the second electricity
The output terminal of pressure sensor and temperature protection switch is all connected with inverter module protector, and the inverter module protector is arranged on
In the master control system of common DC bus converter plant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721314706.0U CN207460013U (en) | 2017-10-12 | 2017-10-12 | Offshore platform low harmony wave common DC bus converter plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721314706.0U CN207460013U (en) | 2017-10-12 | 2017-10-12 | Offshore platform low harmony wave common DC bus converter plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207460013U true CN207460013U (en) | 2018-06-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721314706.0U Expired - Fee Related CN207460013U (en) | 2017-10-12 | 2017-10-12 | Offshore platform low harmony wave common DC bus converter plant |
Country Status (1)
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| CN (1) | CN207460013U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109245130A (en) * | 2018-10-29 | 2019-01-18 | 上海大学 | A kind of system extending 35KV10KV substation radius of electricity supply |
-
2017
- 2017-10-12 CN CN201721314706.0U patent/CN207460013U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109245130A (en) * | 2018-10-29 | 2019-01-18 | 上海大学 | A kind of system extending 35KV10KV substation radius of electricity supply |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180605 Termination date: 20211012 |