CN108183618A - A kind of modularization pedigree high-power marine frequency converter - Google Patents
A kind of modularization pedigree high-power marine frequency converter Download PDFInfo
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- CN108183618A CN108183618A CN201711316157.5A CN201711316157A CN108183618A CN 108183618 A CN108183618 A CN 108183618A CN 201711316157 A CN201711316157 A CN 201711316157A CN 108183618 A CN108183618 A CN 108183618A
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- unit
- rectification
- inversion
- brake
- junior
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/40—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
- H02M5/42—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters
- H02M5/44—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac
- H02M5/443—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a thyratron or thyristor type requiring extinguishing means
- H02M5/45—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
Abstract
A kind of modularization pedigree high-power marine frequency converter, including wire inlet unit, rectification unit, brake unit, inversion unit and outgoing line unit, wire inlet unit is connected with input ac power, the output terminal of wire inlet unit is connected with rectification unit input terminal, it is exported after rectification to dc bus, brake unit takes electricity by dc bus, the output connection braking resistor after copped wave, inversion unit is parallel to dc bus with brake unit, inversion is loads by outgoing line unit output drive motor after alternating voltage, it is characterized in that, also master controller, master controller respectively with rectification unit, inversion unit, brake unit connects, master controller is responsible for rectification unit, inversion unit and brake unit are monitored and control；Externally electric interfaces of the invention using standard connector and are exposed to outside panel, and the flexibility of module mounting, commissioning and maintenance has been significantly greatly increased.
Description
Technical field
The present invention is a kind of modularization pedigree high-power marine frequency converter, is related to high-power marine frequency converter, particularly
Modularization pedigree high-power marine frequency converter is sent out.
Background technology
Marine Synthesize Electric Propulsion System is with noise is low, good speed adjustment features, efficient, volume weight is small, flexible arrangement
The advantages that, be the future development of ship power field direction, it is contemplated that the year two thousand twenty, ordered using the ship of synthesis electrical method system
Odd number will be at 240 or so.Core equipment of the frequency converter as electric propulsion system, performance quality are directly related to propulsion electricity
The working performance of machine, be the key that ensure entire ship power system efficiently, reliable, high performance operation.With high-power electric
The sustainable development of electronic technology and variable-frequency control technique has many developed countries and big-power transducer is applied to ship power
Field, ABB, the Siemens of Germany such as Switzerland, the ALSTOM of France, Hispanic Ingeteam, the Danfoss of Denmark, U.S.
The main industries such as GE of state giant has had abundant frequency converter product line, occupies most of market share, and China
High-power marine frequency converter is still in developing stage.
In addition, the existing high-power marine frequency converter in China belongs to customized product, lack ripe modularization, pedigree
Design concept does not form efficient and rational product line, and marketing is poor, and product operation and maintainability are poor.
At present, the existing high-power marine frequency converter in China belongs to customized product, lacks ripe modularization, pedigree
Design concept does not form efficient and rational product line, and marketing is poor, and product operation and maintainability are poor.
Invention content
The object of the present invention is to provide a kind of modularization pedigree high-power marine frequency converters, are ensureing marine propuision system
Normally, under the premise of reliability service, production, installation, operation, the high efficiency safeguarded are realized.
A kind of modularization pedigree high-power marine frequency converter, including wire inlet unit, rectification unit, brake unit, inversion
Unit and outgoing line unit, wire inlet unit are connected with input ac power, output terminal and the rectification unit input terminal phase of wire inlet unit
Even, to dc bus, brake unit takes electricity by dc bus for output after rectification, and output connection braking resistor, inverse after copped wave
Become unit and be parallel to dc bus with brake unit, inversion is bears by outgoing line unit output drive motor after alternating voltage
It carries, which is characterized in that also have master controller, master controller is connect respectively with rectification unit, inversion unit, brake unit, master control
Device processed is responsible for that rectification unit, inversion unit and brake unit are monitored and controlled；
The rectification unit is connected in parallel including multiple rectification standard junior units, each rectification standard junior unit braking
Watt level is the same, and each rectification standard junior unit includes a rectification from controller, a rectified power module and a sky
The number of rectification standard junior unit is set as needed in cold unit, rectification unit；
The brake unit is connected in parallel including multiple Brake Standards junior units, each Brake Standards junior unit braking
Watt level is the same, and each Brake Standards junior unit includes a braking from controller, a braking power module and a sky
The number of Brake Standards junior unit is set as needed in cold unit, brake unit；
The inversion unit is connected in parallel including multiple inversion standard junior units, each inversion standard junior unit inversion
Watt level is the same, and each inversion standard junior unit includes an inversion from controller, an inverted power module and a sky
The number of inversion standard junior unit is set as needed in cold unit, inversion unit.
6th, key point of the invention
The key point of the present invention is：
1st, by flowing in and out valve in the setting of power module above and below, power module and main cooling circuit are realized
Isolation, while be connected with water distribution pipeline using quick coupling, coolant is revealed, and then pass through drain valve when preventing the pipeline from plugging
Coolant in discharge line really realizes the convenient dismounting of modularization；
2nd, power module is equipped with guide rail and limiting device, when power module is inserted into cabinet, passes through top quick connector reality
Now connect with dc bus, realized by bottom quick connector and connect with external cable, it is easy to operate, be easy to module load and unload and
Repair；
3rd, power module can be installed in parallel, and the same packing forms of inside modules power device have different optional ginsengs
Number product, composition can cover the modularization compared with broad power band, pedigree product line；
4th, using digital distributed control scheme, master-slave controller is interconnected using high speed fibre point-to-point structure,
External electric interfaces using standard connector and are exposed to outside panel, and module mounting, commissioning and maintenance has been significantly greatly increased
Flexibility.
7th, effect of the invention
It is an advantage of the invention that:
1st, using based on water cooling, it is air-cooled supplemented by the type of cooling, helping, which reduces frequency converter volume, weight and audio, makes an uproar
Sound, while redundancy design reduces system maintenance work amount, improves reliabilty and availability.
2nd, attached low-power consumption component is cooled down from bottom to top by centrifugal double air intake blower fans, by sky-water heat exchanger,
Cycle is formed inside cabinet, it is smooth succinct, reach preferable cooling effect.
3rd, by flowing in and out valve in the setting of power module above and below, power module and main cooling circuit are realized
Isolation, while be connected with water distribution pipeline using quick coupling, coolant is revealed, and then pass through drain valve when preventing the pipeline from plugging
Coolant in discharge line really realizes the convenient dismounting of modularization.
4th, power module can be installed in parallel, and the same packing forms of inside modules power device have different optional ginsengs
Number product, composition can cover the modularization compared with broad power band, pedigree product line.
5th, using digital distributed control scheme, master-slave controller is interconnected using high speed fibre point-to-point structure,
External electric interfaces using standard connector and are exposed to outside panel, and module mounting, commissioning and maintenance has been significantly greatly increased
Flexibility.
Description of the drawings
Fig. 1, schematic structural view of the invention；
Fig. 2, rectification unit structure diagram of the present invention；
Fig. 3, brake unit structure diagram of the present invention；
Fig. 4, inversion unit structure diagram of the present invention.
Specific embodiment
A kind of modularization pedigree high-power marine frequency converter, including wire inlet unit, rectification unit, brake unit, inversion
Unit and outgoing line unit, wire inlet unit are connected with input ac power, output terminal and the rectification unit input terminal phase of wire inlet unit
Even, to dc bus, brake unit takes electricity by dc bus for output after rectification, and output connection braking resistor, inverse after copped wave
Become unit and be parallel to dc bus with brake unit, inversion is bears by outgoing line unit output drive motor after alternating voltage
It carries, which is characterized in that also have master controller, master controller is connect respectively with rectification unit, inversion unit, brake unit, master control
Device processed is responsible for that rectification unit, inversion unit and brake unit are monitored and controlled；
The rectification unit is connected in parallel including multiple rectification standard junior units, each rectification standard junior unit braking
Watt level is the same, and each rectification standard junior unit includes a rectification from controller, a rectified power module and a sky
The number of rectification standard junior unit is set as needed in cold unit, rectification unit；
The brake unit is connected in parallel including multiple Brake Standards junior units, each Brake Standards junior unit braking
Watt level is the same, and each Brake Standards junior unit includes a braking from controller, a braking power module and a sky
The number of Brake Standards junior unit is set as needed in cold unit, brake unit；
The inversion unit is connected in parallel including multiple inversion standard junior units, each inversion standard junior unit inversion
Watt level is the same, and each inversion standard junior unit includes an inversion from controller, an inverted power module and a sky
The number of inversion standard junior unit is set as needed in cold unit, inversion unit.
With reference to figure 2, Fig. 2 is a kind of basic model high-power marine main circuit of converter principle provided in an embodiment of the present invention
Figure.In an embodiment of the present invention, a kind of modularization, pedigree high-power marine frequency converter include rectification module, inverter module,
Brake module, wire inlet unit, outgoing line unit, dc bus unit, water cooling unit, air-cooled unit, master controller and from controller.
The effect of rectification module is that input three-phase alternating voltage is shaped as DC voltage, and provided in this embodiment is a kind of
12 pulse wave rectifier schemes, two groups of rectification module Parallel opertations supply after being collected to dc bus unit for inverter module and brake module
Electricity.By taking the rectification module of the top as an example, input three-phase alternating voltage is filtered, and passed via electric current by reactor L1
Sensor I1~I3 is sampled, and then the output direct current of the 6 pulse wave uncontrollable rectifier bridges by being made of diode (led) module D1~D3
Pressure, wherein main track are passed through after fuse F7 with lower section rectification module main track Parallel opertation as positive direct-current busbar, negative wire directly with
Lower section rectification module negative wire Parallel opertation is as negative dc bus.
The effect of inverter module is that DC voltage is shaped as three-phase alternating current frequency conversion voltage, and provided in this embodiment is a kind of
3 groups of inverter module parallel arrangements, each group module, which is output in outgoing line unit 5 and carries out parallel connection, collects output to motor.With the top
For inverter module, input dc power positive pressure negative wire by fuse F9, F10, passes respectively across magnet ring Mr1, and via electric current
Sensor I7 is sampled, and intermediate supports capacitance C1 and equalizing resistance R1 is attempted by positive negative wire both ends, and then by by IGBT module
The three phase inverter bridge output AC frequency conversion voltage that Q1~Q3 is formed, and sampled via current sensor Iu1, Iv1, Iw1, lead to
Overcurrent fuse Fu1, Fv1, Fw1 carry out short-circuit protection, are finally exported after outlet reactor L3 filtering with other wired in parallel.
The effect of brake module is the chopper Qb1 operations when DC bus-bar voltage is more than a certain threshold limit value, will be extra
Energy is drawn out to from intermediate DC circuit in braking resistor.Provided in this embodiment is a kind of single brake module scheme, and input is straight
Galvanic electricity positive pressure line is connected to the chopper being made of IGBT module Qb1, and then diode anode passes through fusing through overcurrent fuse Fb1
Device Fb2 is connected to braking resistor one end, and diode cathode is directly connected to the braking resistor other end, while diode anode is connected to and bears directly
Busbar is flowed, and voltage sensor V1 is set between positive and negative dc bus.
Wire inlet unit has a different allocation plans according to concrete application occasion, and provided in this embodiment is one kind by being isolated
The alternative that switch, fuse and contactor are formed.By taking the wire inlet unit of the top as an example, input three-phase alternating voltage pass through every
It leaves and closes G1, exported across fuse F1~F3, and then by contactor K1 to rectification module.
The main function of outgoing line unit is that the progress parallel connection of the output to multiple inverter modules collects, and pass through quick connector
It is connected to motor.
The main function of dc bus unit is that intermediate DC power supply is collected and shunted, and matches pre-charge module
With forced electric discharge module.Pre-charge module is made of busbar contactor K3, pre-charge contactor K4 and pre-charge resistance R4, in the middle
Between DC voltage it is relatively low when, first be closed pre-charge contactor K4, intermediate Support Capacitor C1~C3 is filled by pre-charge resistance R4
Electricity is closed busbar contactor K3 after Support Capacitor both end voltage reaches certain value, disconnects pre-charge contactor K4, completes preliminary filling
Electricity Functional.Forced electric discharge module is made of electric discharge contactor K5 and discharge resistance R5, after system cut-off, to ensure intermediate supports
Capacitance C1~C3 energy discharges rapidly at the appointed time, is closed electric discharge contactor K5, and energy is released by discharge resistance R5
It puts, middle dc voltage is down to below safe voltage at the appointed time.
The effect of water cooling unit is by heat derives in system and is finally dissipated to extraneous medium, mainly by water pump, board-like
The compositions such as heat exchanger, deionizer, stable-pressure device, instrument and meter, electric controller, pipe fitting.
The effect of air-cooled unit is radiated to frequency-charger cabinet auxiliary low-power consumption component, mainly by centrifugal double air inlets
Wind turbine and sky-water heat exchanger are formed.
When the effect of master controller is actuating motor traction/control for brake, charge and discharge control, System self-test survey, logical AND
Sequence control, speed and power limit, data processing, system protection, the functions such as communicate, mainly by High Performance DSP and high density
FPGA is formed, with respectively carrying out high speed communication by 3 optical fiber respectively from controller 10.
It is to perform modulation algorithm, driving pulse transmission, fault state monitoring, AD conversion, communication etc. from the effect of controller
Function is mainly made of high density FPGA, and high speed communication is carried out by 3 optical fiber with master controller 9.
1. being as shown in Figure 1 high-power marine frequency converter entirety composition frame chart, wire inlet unit is connected with input ac power,
Output terminal is connected with rectification unit input terminal, and output is to dc bus after rectification, and brake unit takes electricity by dc bus, by cutting
Output connection braking resistor after wave, inversion unit are parallel to dc bus, and inversion is exports by outgoing line unit after alternating voltage
Drive motor loads, and master controller is responsible for carrying out rectification unit, inversion unit and brake unit in overall monitoring and control, water
Cold unit is responsible for cooling down wire inlet unit, rectification unit, brake unit, inversion unit and outgoing line unit.
2. be illustrated in figure 2 rectification unit composition frame chart, basic structure by rectified power module, from controller and air-cooled
Unit is formed, and rectified power module, which is mainly realized, hands over straight voltage transformation, and analog acquisition, condition adjudgement are mainly realized from controller
And information uploads, air-cooled unit, which is mainly realized, radiates to attached low-power consumption component；Rectification unit is set based on modularization
Principle is counted, multiple bare bones can be freely in parallel, convenient for power system capacity, and bare bones overall package, reserved standard is to external
Mouthful, convenient for I＆ M.
3. be illustrated in figure 3 brake unit composition frame chart, basic structure by braking power module, from controller and air-cooled
Unit is formed, and braking power module mainly realizes copped wave function, chop control, analog acquisition, shape are mainly realized from controller
State judges and information is received and uploaded, and air-cooled unit, which is mainly realized, radiates to attached low-power consumption component；Brake unit base
In modularized design principle, multiple bare bones can be freely in parallel, convenient for power system capacity, and bare bones overall package, it reserves
Standard external interface, convenient for I＆ M.
4. be illustrated in figure 4 inversion unit composition frame chart, basic structure by inverted power module, from controller and air-cooled
Unit is formed, inverted power module mainly realize it is straight hand over voltage transformation, mainly realized from controller frequency control, pulse generation,
Analog acquisition, condition adjudgement and information, which receive, to be uploaded, and air-cooled unit, which is mainly realized, dissipates attached low-power consumption component
Heat；Inversion unit is based on modularized design principle, multiple bare bones can freely parallel connection, convenient for power system capacity, and bare bones
Overall package reserves standard external interface, convenient for I＆ M.
Claims (1)
1. a kind of modularization pedigree high-power marine frequency converter, including wire inlet unit, rectification unit, brake unit, inversion list
Member and outgoing line unit, wire inlet unit are connected with input ac power, and the output terminal of wire inlet unit is connected with rectification unit input terminal,
To dc bus, brake unit takes electricity by dc bus for output after rectification, output connection braking resistor, inversion list after copped wave
Member is parallel to dc bus with brake unit, and inversion is to be loaded by outgoing line unit output drive motor after alternating voltage,
It is characterized in that, also master controller, master controller is connect respectively with rectification unit, inversion unit, brake unit, and master controller is born
Duty is monitored and controls to rectification unit, inversion unit and brake unit；
The rectification unit is connected in parallel including multiple rectification standard junior units, each rectification standard junior unit braking power
Size is the same, and each rectification standard junior unit includes a rectification from controller, a rectified power module and an air-cooled list
The number of rectification standard junior unit is set as needed in member, rectification unit；
The brake unit is connected in parallel including multiple Brake Standards junior units, each Brake Standards junior unit braking power
Size is the same, and each Brake Standards junior unit includes a braking from controller, a braking power module and an air-cooled list
The number of Brake Standards junior unit is set as needed in member, brake unit；
The inversion unit is connected in parallel including multiple inversion standard junior units, each inversion standard junior unit inverter power
Size is the same, and each inversion standard junior unit includes an inversion from controller, an inverted power module and an air-cooled list
The number of inversion standard junior unit is set as needed in member, inversion unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711316157.5A CN108183618B (en) | 2017-12-12 | 2017-12-12 | Modular pedigree high-power marine frequency converter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711316157.5A CN108183618B (en) | 2017-12-12 | 2017-12-12 | Modular pedigree high-power marine frequency converter |
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| Publication Number | Publication Date |
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| CN108183618A true CN108183618A (en) | 2018-06-19 |
| CN108183618B CN108183618B (en) | 2020-12-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201711316157.5A Active CN108183618B (en) | 2017-12-12 | 2017-12-12 | Modular pedigree high-power marine frequency converter |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112311298A (en) * | 2020-10-14 | 2021-02-02 | 青岛中加特电气股份有限公司 | Frequency conversion cabinet |
| CN113224838A (en) * | 2021-03-30 | 2021-08-06 | 中国人民解放军海军工程大学 | Fifteen-phase large-capacity induction propulsion frequency converter control framework |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101959708A (en) * | 2008-03-07 | 2011-01-26 | 株式会社东芝 | Electric vehicle driving device |
| CN102355195A (en) * | 2011-10-24 | 2012-02-15 | 乔鸣忠 | Multi-inverter module paralleling frequency conversion device for transmission system and control policy |
| CN203457058U (en) * | 2013-09-12 | 2014-02-26 | 沈阳三洋电梯有限公司 | Common-bus frequency converter system |
| CN203708119U (en) * | 2013-12-11 | 2014-07-09 | 上海尚盈机电设备有限公司 | A unit combined type rectifier |
| CN104218818A (en) * | 2014-09-26 | 2014-12-17 | 永济新时速电机电器有限责任公司 | Current transformer for electric propulsive inland water transportation ship |
| CN105978359A (en) * | 2016-06-20 | 2016-09-28 | 中国人民解放军海军工程大学 | Twelve-phase permanent magnet propulsion converter |
-
2017
- 2017-12-12 CN CN201711316157.5A patent/CN108183618B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101959708A (en) * | 2008-03-07 | 2011-01-26 | 株式会社东芝 | Electric vehicle driving device |
| CN102355195A (en) * | 2011-10-24 | 2012-02-15 | 乔鸣忠 | Multi-inverter module paralleling frequency conversion device for transmission system and control policy |
| CN203457058U (en) * | 2013-09-12 | 2014-02-26 | 沈阳三洋电梯有限公司 | Common-bus frequency converter system |
| CN203708119U (en) * | 2013-12-11 | 2014-07-09 | 上海尚盈机电设备有限公司 | A unit combined type rectifier |
| CN104218818A (en) * | 2014-09-26 | 2014-12-17 | 永济新时速电机电器有限责任公司 | Current transformer for electric propulsive inland water transportation ship |
| CN105978359A (en) * | 2016-06-20 | 2016-09-28 | 中国人民解放军海军工程大学 | Twelve-phase permanent magnet propulsion converter |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112311298A (en) * | 2020-10-14 | 2021-02-02 | 青岛中加特电气股份有限公司 | Frequency conversion cabinet |
| CN113224838A (en) * | 2021-03-30 | 2021-08-06 | 中国人民解放军海军工程大学 | Fifteen-phase large-capacity induction propulsion frequency converter control framework |
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| Publication number | Publication date |
|---|---|
| CN108183618B (en) | 2020-12-11 |
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