CN108183618B - Modular pedigree high-power marine frequency converter - Google Patents
Modular pedigree high-power marine frequency converter Download PDFInfo
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- CN108183618B CN108183618B CN201711316157.5A CN201711316157A CN108183618B CN 108183618 B CN108183618 B CN 108183618B CN 201711316157 A CN201711316157 A CN 201711316157A CN 108183618 B CN108183618 B CN 108183618B
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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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Abstract
A modularized pedigree high-power marine frequency converter comprises an incoming line unit, a rectifying unit, a braking unit, an inverting unit and an outgoing line unit, wherein the incoming line unit is connected with an input alternating current power supply, the output end of the incoming line unit is connected with the input end of the rectifying unit, the rectified incoming line unit outputs the rectified incoming line to a direct current bus, the braking unit obtains electricity from the direct current bus, the chopped wave output is connected with a braking resistor, the inverting unit and the braking unit are connected in parallel with the direct current bus, the alternating current voltage is inverted and then output to a driving motor load through the outgoing line unit, and the modularized pedigree high-power marine frequency converter is characterized by further comprising a main controller, the main controller is respectively connected with the rectifying unit, the inverting unit and the braking unit; the external electrical interface of the invention adopts the standard connector and is exposed outside the panel, thus greatly increasing the flexibility of module installation, use and maintenance.
Description
Technical Field
The invention discloses a modularized pedigree high-power marine frequency converter, relates to a high-power marine frequency converter, and particularly relates to a modularized pedigree high-power marine frequency converter.
Background
The comprehensive electric propulsion system of the ship has the advantages of low noise, good speed regulation performance, high efficiency, small volume and weight, flexible arrangement and the like, is the direction of future development in the field of ship power, and is estimated to be about 240 ships with the comprehensive electric propulsion system in 2020. The frequency converter is used as a core device of the electric propulsion system, the performance of the frequency converter is directly related to the working performance of the propulsion motor, and the frequency converter is the key for ensuring the high-efficiency, reliable and high-performance work of the whole ship power system. With the continuous development of high-power electronic technology and variable-frequency speed control technology, high-power frequency converters are applied to the field of ship power in less developed countries, for example, ABB in Switzerland, Siemens in Germany, ALSTOM in France, Ingeteam in Spain, Danfoss in Denmark, GE in America and other major industries have abundant frequency converter product lines and occupy most market shares, and the high-power marine frequency converters in China are still in the development stage.
In addition, the existing high-power marine frequency converter in China belongs to customized products, lacks mature modularization and pedigree design concepts, does not form a high-efficiency and reasonable product line, and has poor market popularization and poor product operation and maintenance.
At present, the existing high-power marine frequency converter in China belongs to customized products, lacks mature modularization and pedigree design concepts, does not form a high-efficiency and reasonable product line, and has poor market popularization and poor product operation and maintenance.
Disclosure of Invention
The invention aims to provide a modular pedigree high-power marine frequency converter, which realizes high efficiency of production, installation, operation and maintenance of products on the premise of ensuring normal and reliable operation of a marine propulsion system.
A modularized pedigree high-power marine frequency converter comprises an incoming line unit, a rectifying unit, a braking unit, an inverting unit and an outgoing line unit, wherein the incoming line unit is connected with an input alternating current power supply, the output end of the incoming line unit is connected with the input end of the rectifying unit, the rectified incoming line unit outputs the rectified incoming line to a direct current bus, the braking unit obtains electricity from the direct current bus, the chopped wave output is connected with a braking resistor, the inverting unit and the braking unit are connected in parallel with the direct current bus, the alternating current voltage is inverted and then output to a driving motor load through the outgoing line unit, and the modularized pedigree high-power marine frequency converter is characterized by further comprising a main controller, the main controller is respectively connected with the rectifying unit, the inverting unit and the braking unit;
the rectifying unit comprises a plurality of rectifying standard small units which are connected in parallel, the braking power of each rectifying standard small unit is the same, each rectifying standard small unit comprises a rectifying slave controller, a rectifying power module and an air cooling unit, and the number of the rectifying standard small units is set by the rectifying unit according to the requirement;
the brake unit comprises a plurality of brake standard small units which are connected in parallel, the brake power of each brake standard small unit is the same, each brake standard small unit comprises a brake slave controller, a brake power module and an air cooling unit, and the number of the brake standard small units is set by the brake unit according to the requirement;
the inversion unit comprises a plurality of inversion standard small units which are connected in parallel, the inversion power of each inversion standard small unit is the same, each inversion standard small unit comprises an inversion slave controller, an inversion power module and an air cooling unit, and the number of the inversion standard small units is set by the inversion unit according to needs.
Sixthly, the key point of the invention
The key points of the invention are as follows:
1. the isolation of the power module and the main cooling loop is realized by arranging the inflow valve and the outflow valve below and above the power module, and meanwhile, the quick connector is connected with the water distribution pipeline to prevent the leakage of cooling liquid when the pipeline is plugged and unplugged, so that the cooling liquid in the pipeline is discharged through the drain valve, and the convenient and fast modularization disassembly and assembly are really realized;
2. the power module is provided with a guide rail and a limiting device, when the power module is inserted into the cabinet body, the power module is connected with the direct current bus through the top quick connector, and is connected with an external cable through the bottom quick connector, so that the operation is convenient, and the module is easy to assemble, disassemble and maintain;
3. the power modules can be installed in parallel, and the power devices in the modules have different optional parameter products in the same packaging mode to form a modular and pedigree product line capable of covering a wider power range;
4. and a full-digital distributed control scheme is adopted, the master controller and the slave controller are interconnected by adopting a high-speed optical fiber point-to-point structure, and external electrical interfaces are all standard connectors and exposed outside the panel, so that the flexibility of module installation, use and maintenance is greatly improved.
Seventh, effects of the invention
The invention has the advantages that:
1. and a cooling mode with water cooling as a main mode and air cooling as an auxiliary mode is adopted, so that the volume, the weight and the audio noise of the frequency converter are reduced, meanwhile, the redundancy design reduces the system maintenance workload, and the reliability and the availability are improved.
2. The auxiliary low-power-consumption components are cooled from bottom to top by the centrifugal double-air-inlet fan, and form circulation in the cabinet body through the air-water heat exchanger, so that the cooling effect is good, and the cooling effect is smooth and simple.
3. Through set up inflow and outflow valve below and top at power module, realize power module and main cooling circuit's isolation, adopt quick-operation joint to link to each other with the distribution pipe way simultaneously, coolant liquid reveals when preventing the pipeline plug, and then through drain valve discharge pipe internal cooling liquid, really realize the convenient dismouting of modularization.
4. The power modules can be installed in parallel, and the power devices in the modules have different optional parameter products in the same packaging mode, so that a modularized and pedigree product line capable of covering a wider power range is formed.
5. And a full-digital distributed control scheme is adopted, the master controller and the slave controller are interconnected by adopting a high-speed optical fiber point-to-point structure, and external electrical interfaces are all standard connectors and exposed outside the panel, so that the flexibility of module installation, use and maintenance is greatly improved.
Drawings
FIG. 1 is a schematic view of the structure of the present invention;
FIG. 2 is a schematic view of a rectifying unit structure according to the present invention;
FIG. 3 is a schematic structural diagram of a brake unit of the present invention;
FIG. 4 is a schematic diagram of an inversion unit structure according to the present invention.
Detailed Description
A modularized pedigree high-power marine frequency converter comprises an incoming line unit, a rectifying unit, a braking unit, an inverting unit and an outgoing line unit, wherein the incoming line unit is connected with an input alternating current power supply, the output end of the incoming line unit is connected with the input end of the rectifying unit, the rectified incoming line unit outputs the rectified incoming line to a direct current bus, the braking unit obtains electricity from the direct current bus, the chopped wave output is connected with a braking resistor, the inverting unit and the braking unit are connected in parallel with the direct current bus, the alternating current voltage is inverted and then output to a driving motor load through the outgoing line unit, and the modularized pedigree high-power marine frequency converter is characterized by further comprising a main controller, the main controller is respectively connected with the rectifying unit, the inverting unit and the braking unit;
the rectifying unit comprises a plurality of rectifying standard small units which are connected in parallel, the braking power of each rectifying standard small unit is the same, each rectifying standard small unit comprises a rectifying slave controller, a rectifying power module and an air cooling unit, and the number of the rectifying standard small units is set by the rectifying unit according to the requirement;
the brake unit comprises a plurality of brake standard small units which are connected in parallel, the brake power of each brake standard small unit is the same, each brake standard small unit comprises a brake slave controller, a brake power module and an air cooling unit, and the number of the brake standard small units is set by the brake unit according to the requirement;
the inversion unit comprises a plurality of inversion standard small units which are connected in parallel, the inversion power of each inversion standard small unit is the same, each inversion standard small unit comprises an inversion slave controller, an inversion power module and an air cooling unit, and the number of the inversion standard small units is set by the inversion unit according to needs.
Referring to fig. 2, fig. 2 is a schematic diagram of a main circuit of a basic high-power marine frequency converter according to an embodiment of the present invention. In the embodiment of the invention, the modularized and pedigree high-power frequency converter for the ship comprises a rectifying module, an inverter module, a braking module, an incoming line unit, an outgoing line unit, a direct current bus unit, a water cooling unit, an air cooling unit, a main controller and a slave controller.
The rectifying modules are used for rectifying input three-phase alternating-current voltage into direct-current voltage, and the embodiment provides a 12-pulse rectifying scheme. Taking the uppermost rectifying module as an example, an input three-phase alternating current voltage is filtered through an incoming line reactor L1, sampled through current sensors I1 to I3, and then output as a direct current voltage through a 6-pulse uncontrolled rectifier bridge composed of diode modules D1 to D3, wherein a positive line passes through a fuse F7 and then is output in parallel with a positive line of the lower rectifying module as a positive direct current bus, and a negative line is directly output in parallel with a negative line of the lower rectifying module as a negative direct current bus.
The inverter module is used for shaping a direct current voltage into a three-phase alternating current variable frequency voltage, and the embodiment provides a parallel scheme of 3 groups of inverter modules, wherein the output of each group of inverter modules is output to the outlet unit 5 to be connected in parallel and collected to be output to the motor. Taking the uppermost inverter module as an example, the positive and negative lines of the input direct-current voltage respectively pass through fuses F9 and F10, pass through a magnetic ring Mr1, and are sampled by a current sensor I7, an intermediate support capacitor C1 and a voltage equalizing resistor R1 are connected in parallel at two ends of the positive and negative lines, further, the alternating-current variable-frequency voltage is output by a three-phase inverter bridge composed of IGBT modules Q1 to Q3, is sampled by current sensors Iu1, Iv1 and Iw1, is short-circuit protected by fuses Fu1, Fv1 and Fw1, and is finally filtered by an outlet reactor L3 and then is connected in parallel with other modules for output.
The function of the braking module is that when the dc bus voltage exceeds a certain maximum limit, the chopper Qb1 is operated, drawing excess energy from the intermediate dc circuit to the braking resistor. The embodiment provides a single-brake module scheme, an input direct-current voltage positive line is connected to a chopper formed by an IGBT module Qb1 through a fuse Fb1, a diode anode is further connected to one end of a brake resistor through a fuse Fb2, a diode cathode is directly connected to the other end of the brake resistor, the diode anode is connected to a negative direct-current bus, and a voltage sensor V1 is arranged between the positive direct-current bus and the negative direct-current bus.
The incoming line unit has different configuration schemes according to specific application occasions, and the embodiment provides an alternative scheme formed by an isolating switch, a fuse and a contactor. Taking the uppermost incoming line unit as an example, the three-phase ac voltage is input through the isolating switch G1, passes through the fuses F1 to F3, and is output to the rectifying module through the contactor K1.
The wire outlet unit is mainly used for collecting the outputs of the plurality of inverter modules in parallel and is connected to the motor through the quick connector.
The direct current bus unit mainly has the functions of collecting and shunting the intermediate direct current power supply, and is matched with a pre-charging module and a forced discharging module. The pre-charging module is composed of a bus contactor K3, a pre-charging contactor K4 and a pre-charging resistor R4, when the intermediate direct-current voltage is low, the pre-charging contactor K4 is closed firstly, intermediate supporting capacitors C1-C3 are charged through the pre-charging resistor R4, when the voltage at two ends of each supporting capacitor reaches a certain value, the bus contactor K3 is closed, the pre-charging contactor K4 is disconnected, and the pre-charging function is completed. The forced discharging module is composed of a discharging contactor K5 and a discharging resistor R5, when the system is powered off, in order to ensure that the energy of the middle supporting capacitors C1-C3 is released rapidly within a specified time, the discharging contactor K5 is closed, the energy is released through the discharging resistor R5, and the middle direct-current voltage is reduced to be lower than the safe voltage within the specified time.
The water cooling unit is used for guiding out heat in the system and finally dissipating the heat to an external medium, and mainly comprises a water pump, a plate heat exchanger, a deionization device, a pressure stabilizing device, instruments and meters, an electric controller, a pipeline pipe fitting and the like.
The air cooling unit is used for radiating low-power consumption components attached to the frequency converter cabinet and mainly comprises a centrifugal double-air-inlet fan and an air-water heat exchanger.
The main controller is used for executing the functions of motor traction/brake control, charge and discharge control, system self-detection, logic and time sequence control, speed and power limitation, data processing, system protection, communication and the like, mainly comprises a high-performance DSP and a high-density FPGA, and is in high-speed communication with each slave controller 10 through 3 optical fibers.
The slave controller is used for executing functions such as modulation algorithm, driving pulse transmission, fault state monitoring, AD conversion, communication and the like, mainly comprises a high-density FPGA, and is in high-speed communication with the master controller 9 through 3 optical fibers.
1. As shown in fig. 1, the high-power marine frequency converter is a block diagram integrally formed, wherein an incoming line unit is connected with an input alternating current power supply, an output end of the incoming line unit is connected with an input end of a rectifying unit, the rectified incoming line unit outputs the rectified incoming line to a direct current bus, a braking unit obtains electricity from the direct current bus, the chopped wave output of the braking unit is connected with a braking resistor, an inverting unit is connected in parallel with the direct current bus, the inverted incoming line unit outputs the alternating current voltage to drive a motor load through an outgoing line unit, a main controller is responsible for overall monitoring and controlling the rectifying unit, the inverting unit and the braking unit, and a water cooling unit is responsible for cooling the incoming.
2. Fig. 2 is a block diagram of a rectifier unit, and a basic structure of the rectifier unit is composed of a rectifier power module, a slave controller and an air cooling unit, wherein the rectifier power module mainly realizes ac-dc voltage conversion, the slave controller mainly realizes analog quantity acquisition, state judgment and information uploading, and the air cooling unit mainly realizes heat dissipation of an auxiliary low-power consumption component; the rectification unit is based on the modular design principle, and a plurality of basic parts can freely be connected in parallel, the system capacity of being convenient for to basic part whole encapsulation, the external interface of reservation standard is convenient for assemble and maintain.
3. Fig. 3 is a block diagram of a brake unit, and a basic structure of the brake unit is composed of a brake power module, a slave controller and an air cooling unit, wherein the brake power module mainly realizes a chopping function, the slave controller mainly realizes chopping control, analog quantity acquisition, state judgment and information receiving and uploading, and the air cooling unit mainly realizes heat dissipation of an auxiliary low-power-consumption component; the brake unit is based on the modular design principle, and a plurality of basic parts can freely be parallelly connected, the system capacity of being convenient for to basic part whole encapsulation, the external interface of reservation standard is convenient for assemble and maintain.
4. Fig. 4 is a block diagram of an inversion unit, which is composed of an inversion power module, a slave controller and an air cooling unit, wherein the inversion power module mainly implements direct-to-alternating voltage conversion, the slave controller mainly implements frequency conversion control, pulse generation, analog quantity acquisition, state judgment and information receiving and uploading, and the air cooling unit mainly implements heat dissipation of an attached low-power-consumption component; the inversion unit is based on the modular design principle, and a plurality of basic parts can freely be parallelly connected, the system capacity of being convenient for to basic part whole encapsulation, reservation standard external interface, the assembly and the maintenance of being convenient for.
Claims (2)
1. A modularized pedigree high-power marine frequency converter comprises an incoming line unit, a rectifying unit, a braking unit, an inverting unit and an outgoing line unit, wherein the incoming line unit is connected with an input alternating current power supply, the output end of the incoming line unit is connected with the input end of the rectifying unit, the rectified incoming line unit outputs the rectified incoming line to a direct current bus, the braking unit obtains electricity from the direct current bus, the chopped wave output is connected with a braking resistor, the inverting unit and the braking unit are connected in parallel with the direct current bus, the alternating current voltage is inverted and then output to a driving motor load through the outgoing line unit, and the modularized pedigree high-power marine frequency converter is characterized by further comprising a main controller, the main controller is respectively connected with the rectifying unit, the inverting unit and the braking unit;
the rectifying unit comprises a plurality of rectifying standard small units which are connected in parallel, the rectifying power of each rectifying standard small unit is the same, each rectifying standard small unit comprises a rectifying slave controller, a rectifying power module and an air cooling unit, and the number of the rectifying standard small units is set by the rectifying unit according to the requirement;
the brake unit comprises a plurality of brake standard small units which are connected in parallel, the brake power of each brake standard small unit is the same, each brake standard small unit comprises a brake slave controller, a brake power module and an air cooling unit, and the number of the brake standard small units is set by the brake unit according to the requirement;
the inversion unit comprises a plurality of inversion standard small units which are connected in parallel, the inversion power of each inversion standard small unit is the same, each inversion standard small unit comprises an inversion slave controller, an inversion power module and an air cooling unit, and the number of the inversion standard small units is set by the inversion unit according to the requirement;
the control adopts a full-digital distributed control scheme, the master controller and the slave controller are interconnected by adopting a high-speed optical fiber point-to-point structure, and the master controller executes the functions of motor traction/brake control, charge and discharge control, system self-detection, logic and time sequence control, speed and power limitation, data processing, system protection and communication; the slave controller executes the functions of modulation algorithm, driving pulse transmission, fault state monitoring, AD conversion and communication;
the cooling mode with water cooling as a main mode and air cooling as an auxiliary mode is adopted, cooling water inflow and outflow valves are arranged below and above the power module, the power module is isolated from a main cooling loop, and meanwhile, a quick connector is connected with a water distribution pipeline to prevent cooling liquid from leaking when the pipeline is plugged and pulled; the auxiliary low-power consumption components are cooled from bottom to top by the centrifugal double-air-inlet fan, and form circulation in the cabinet body through the air-water heat exchanger;
the rectification power module, the braking power module and the inversion power module are provided with the guide rail and the limiting device, and external electrical interfaces are all standard connectors and exposed outside, so that the flexibility of module installation, use and maintenance is greatly improved.
2. The modular pedigree high-power marine frequency converter according to claim 1, wherein: the same packaging form of the power module has different optional parameter products, and a modularized and pedigree product line capable of covering a wider power range is formed.
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| CN201711316157.5A CN108183618B (en) | 2017-12-12 | 2017-12-12 | Modular pedigree high-power marine frequency converter |
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| CN201711316157.5A CN108183618B (en) | 2017-12-12 | 2017-12-12 | Modular pedigree high-power marine frequency converter |
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| CN108183618B true CN108183618B (en) | 2020-12-11 |
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| 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 | Priority date | Publication date | Assignee | Title |
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| JP4643670B2 (en) * | 2008-03-07 | 2011-03-02 | 株式会社東芝 | Electric car drive |
| 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 |
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