CN109474188B - Three-level high-voltage high-power water-cooling frequency converter system - Google Patents
Three-level high-voltage high-power water-cooling frequency converter system Download PDFInfo
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- CN109474188B CN109474188B CN201811642075.4A CN201811642075A CN109474188B CN 109474188 B CN109474188 B CN 109474188B CN 201811642075 A CN201811642075 A CN 201811642075A CN 109474188 B CN109474188 B CN 109474188B
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- 238000001816 cooling Methods 0.000 title claims abstract description 75
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 44
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 44
- 239000010703 silicon Substances 0.000 claims abstract description 44
- 238000004804 winding Methods 0.000 claims abstract description 44
- 230000005284 excitation Effects 0.000 claims abstract description 27
- 230000017525 heat dissipation Effects 0.000 claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 238000010521 absorption reaction Methods 0.000 claims description 28
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 18
- 229910052802 copper Inorganic materials 0.000 claims description 18
- 239000010949 copper Substances 0.000 claims description 18
- 239000006096 absorbing agent Substances 0.000 claims description 14
- 230000007246 mechanism Effects 0.000 claims description 11
- 239000003990 capacitor Substances 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 7
- 238000009413 insulation Methods 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 6
- 238000000926 separation method Methods 0.000 claims description 6
- 239000011888 foil Substances 0.000 claims description 5
- 238000009434 installation Methods 0.000 claims description 3
- 238000001914 filtration Methods 0.000 abstract description 3
- 230000006872 improvement Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 7
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
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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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/003—Constructional details, e.g. physical layout, assembly, wiring or busbar connections
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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
- H02M1/00—Details of apparatus for conversion
- H02M1/12—Arrangements for reducing harmonics from ac input or output
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/14—Mounting supporting structure in casing or on frame or rack
- H05K7/1422—Printed circuit boards receptacles, e.g. stacked structures, electronic circuit modules or box like frames
- H05K7/1427—Housings
- H05K7/1432—Housings specially adapted for power drive units or power converters
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/2089—Modifications to facilitate cooling, ventilating, or heating for power electronics, e.g. for inverters for controlling motor
- H05K7/20927—Liquid coolant without phase change
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- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
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- Thermal Sciences (AREA)
- Rectifiers (AREA)
Abstract
The invention relates to a three-level high-voltage high-power water-cooled frequency converter system, which comprises: the system comprises a water-cooling filter cabinet, an expandable bridge arm parallel frequency converter cabinet, a full digital adjusting cabinet, a water-cooling excitation winding system cabinet and a water circulation heat dissipation system cabinet; the water-cooling filter cabinet, the expandable bridge arm parallel frequency converter cabinet, the all-digital adjusting cabinet, the water-cooling excitation winding system cabinet and the water circulation heat dissipation system cabinet are mutually assembled from left to right to form a complete high-voltage high-power water-cooling frequency converter system, wherein: the water-cooling filter cabinet reduces input higher harmonic waves and is used for smooth filtering; harmonic interference caused by ultra-long distance input of a bridge arm parallel system is restrained; the water-cooling exciting winding system cabinet realizes the functions of a single/double three-phase 6-pulse silicon controlled rectifier exciting winding system through different assembly modes of the silicon controlled rectifier module. The invention can effectively inhibit harmonic interference caused by ultra-long distance input of the bridge arm parallel system, balance input current of the bridge arm parallel frequency converter, effectively improve space utilization, and further provide a more stable operation condition of the frequency converter system based on the double bridge arm power units.
Description
Technical Field
The invention relates to a frequency converter, in particular to a three-level expandable bridge arm parallel high-voltage high-power water-cooling frequency converter, and belongs to the technical field of electrical control structural components.
Background
The prior high-power frequency converter application technology (CN 201711497980.0 invention patent) is mature, most of the technology can meet the requirements of modularized maintenance and heat dissipation efficiency of power components, and the problem of space utilization is greatly solved; the method combines different modes and numbers of parallel connection of left and right bridge arms in the double-bridge arm power unit module, parallel connection of the double-bridge arm power unit module and the like, flexibly diversifies the expansion of various output powers of the frequency converter, and adapts to application occasions with different output power requirements. However, in the using process of the frequency converter in the prior art, the frequency converter is often impacted by surge current and surge voltage, and the performance and the service life of the frequency converter are seriously damaged; harmonic interference caused by the input of the frequency converter at an ultra-long distance; the space utilization of the exciting winding system occupies a larger use space, and the service life of the thyristor is affected by poor heat dissipation performance.
Disclosure of Invention
The technical scheme of the three-level high-voltage high-power water-cooling frequency converter system adopts modular design of each component, has ingenious, compact and simple structural design, and is convenient to popularize and apply.
In order to achieve the above object, the technical scheme of the present invention is as follows: a three-level high-voltage high-power water-cooled frequency converter system, the system comprising: the system comprises a water-cooling filter cabinet, an expandable bridge arm parallel frequency converter cabinet, a full digital adjusting cabinet, a water-cooling excitation winding system cabinet and a water circulation heat dissipation system cabinet; the water-cooling filter cabinet, the expandable bridge arm parallel frequency converter cabinet, the all-digital adjusting cabinet, the water-cooling excitation winding system cabinet and the water circulation heat dissipation system cabinet are mutually assembled from left to right to form a set of three-level high-voltage high-power water-cooling frequency converter system.
Preferably, the water-cooling filter cabinet 1 comprises a high-voltage high-power water-cooling reactor, a circulating reactor module, a turbulent fan and a filter cabinet body; the high-voltage high-power water-cooling reactor is arranged at the lower side in the filter cabinet body; the circulating reactor modules are arranged on left and right fixed beams of the filter cabinet body; the turbulent flow fan is arranged at the upper part of the filter cabinet door; the high-voltage high-power water-cooling reactor, the circulating reactor module and the turbulent fan are arranged at the corresponding positions of the filter cabinet body through the connecting mechanism.
Preferably, the high-voltage high-power water-cooling reactor adopts a novel water-electricity separation type foil winding process water-cooling reactor;
preferably, the circulating reactor module consists of six hollow reactors, two hollow reactors are combined, the inlet wire end is connected to the water-cooling reactor in series and parallel through the copper bars, and the outlet wire end is connected to the bridge arm parallel rectifying frequency converter system in series and parallel through the copper bars.
Preferably, the water-cooling excitation winding system cabinet comprises a three-phase 6-pulse silicon controlled rectifier module, an overvoltage absorption protection module, a control module, a double-system switching module and an excitation winding cabinet body; the three-phase 6-pulse silicon controlled rectifier module is arranged and installed on the left side or the middle side of the upper part of the exciting winding cabinet body, the overvoltage absorption protection module is arranged on the right side of the upper part of the exciting winding cabinet body, and the control module is arranged on the lower part of the three-phase 6-pulse silicon controlled rectifier module; the dual-system switching module is arranged at the rear side of the control module; the three-phase 6-pulse silicon controlled rectifier module, the overvoltage absorption protection module, the control module and the dual-system switching module are arranged at corresponding positions of the excitation winding cabinet through connecting mechanisms.
Preferably, the three-phase 6-pulse silicon controlled rectifier module comprises a water-cooling radiator, a unit shell, a silicon controlled rectifier, a resistance-capacitance absorber and a pulse power amplifier board, wherein the silicon controlled rectifier, the resistance-capacitance absorber and the pulse power amplifier board are arranged on one side of the water-cooling radiator through a connecting mechanism.
Preferably, the water-cooling radiator is designed into a double-sided mounting structure, the silicon controlled rectifier is three double-tube silicon controlled rectifiers which are respectively mounted on three copper bars, and the resistance-capacitance absorber comprises six absorption capacitors and six absorption resistors which are distributed on the copper bars connected with each silicon controlled rectifier in parallel in a series-parallel manner.
Preferably, the resistance-capacitance absorber is a novel film capacitor, and is arranged on a copper bar connected with the silicon controlled rectifier through a connecting mechanism, and the absorption resistor is arranged at a heat dissipation position of a runner corresponding to the water-cooling radiator through a bolt.
Preferably, the water-cooling radiator further comprises a temperature monitoring PT, wherein the temperature monitoring PT is arranged at the position, close to the inlet and outlet sides, of the upper center and the lower center of the water-cooling radiator through a connecting mechanism.
Preferably, the overvoltage absorption protection module consists of a piezoresistor, a fast fuse and a rectifier bridge, and the piezoresistor, the fast fuse and the rectifier bridge are arranged on an alternating current inlet side behind the three-phase six-pulse silicon controlled rectifier module through a connecting mechanism.
Preferably, the control module is composed of a pulse distribution plate, a relay, a switching power supply, an insulation monitor, a temperature monitor and a voltage transformer, wherein the pulse distribution plate, the relay, the switching power supply, the insulation monitor, the temperature monitor and the voltage transformer are assembled on a mounting plate to form the control module.
Preferably, the dual-system switching module is composed of a plurality of switching knife switches, and the switching of different excitation winding systems can be realized rapidly through the switching knife switches.
Compared with the prior art, the invention has the following advantages,
1) The water-cooling filter cabinet adopts the high-voltage high-power water-cooling reactor, can reduce input higher harmonic waves, is used for smooth filtering, effectively protects a frequency converter and improves a power factor, can prevent interference from a power grid, and can reduce pollution of harmonic current generated by a rectifying unit to the power grid; the novel water-electricity separation type foil winding process water-cooling reactor is adopted in the high-voltage high-power water-cooling reactor, so that the heat dissipation problem caused by the high-power reactor is further solved, and the overall space utilization rate is improved by matching with a 'frequency converter based on a double-bridge arm power unit' water-cooling heat dissipation system;
2) The circulating current reactor module is used for inhibiting harmonic interference caused by long-distance input of the bridge arm parallel rectifying frequency converter system, balancing input current of the bridge arm parallel rectifying frequency converter and further providing a more stable operation condition of the frequency converter system based on the double bridge arm power units;
3) The water cooling radiator mode is adopted, so that the heat dissipation performance of the system is greatly improved; the excitation winding system is assembled by components in different numbers and forms through the silicon controlled rectifier modules, so that the function expansion of the single/double three-phase 6-pulse silicon controlled rectifier excitation winding system is realized; effectively improve the space utilization
4) The double-system switching function is added, so that the switching of different excitation winding systems can be realized rapidly; the resistance-capacitance absorption scheme is optimized, the resistance-capacitance absorption effect is improved, and the system reliability is effectively improved;
5) The technical scheme has the advantages of simple structure, low cost and high reliability; each component is in modularized design, so that rapid installation and maintenance can be realized more rapidly, and a more stable operation condition of the frequency converter system based on the double-bridge arm power unit is further provided.
Drawings
Fig. 1 is a schematic diagram of a three-level expandable bridge arm parallel high-voltage high-power water-cooled frequency converter.
Fig. 2 is a schematic diagram of a water-cooled filter cabinet according to the present invention.
Fig. 3 is a schematic diagram of a series-parallel structure of a loop reactor module according to the present invention.
Fig. 4 is a schematic diagram of the high-voltage high-power water-cooled reactor according to the present invention.
FIG. 5 is a schematic diagram of the field winding system of the present invention;
FIG. 6 is a schematic diagram of a three-phase six-pulse SCR rectifying module according to the present invention;
in the figure: 1. the water-cooling filter cabinet, 2, the bridge arm parallel frequency converter cabinet that can extend, 3, the full digital regulator cubicle, 4, the water-cooling excitation winding system cabinet, 5, the hydrologic cycle cooling system cubicle, 101, high-voltage high-power water-cooling reactor, 102, the circulation reactor module, 103, the vortex fan, 104, the filter cabinet body, 401, the silicon controlled rectifier module, 402, the overvoltage absorption protection module, 403, the control module, 404, the dual system switching module, 405, the cabinet body, 4011, the water-cooling radiator, 4012, the unit shell, 4013, double-tube silicon controlled rectifier, 4014, resistance-capacitance absorption, 4015, the pulse power amplifier board, 4016 temperature monitoring PT.
The specific embodiment is as follows:
in order to enhance the understanding of the present invention, the present embodiment will be described in detail with reference to the accompanying drawings.
Example 1: referring to fig. 1, a three-level high-voltage high-power water-cooled inverter system includes: the device comprises a water-cooling filter cabinet 1, a bridge arm parallel-connection frequency converter cabinet 2 which can be expanded, a full digital adjusting cabinet 3, a water-cooling excitation winding system cabinet 4 and a water circulation heat dissipation system cabinet 5; the water-cooling filter cabinet 1, the expandable bridge arm parallel frequency converter cabinet 2, the all-digital adjusting cabinet 3, the water-cooling excitation winding system cabinet 4 and the water circulation heat dissipation system cabinet 5 are mutually assembled from left to right to form a set of more perfect high-voltage high-power water-cooling frequency converter system.
Example 2: referring to fig. 2, as an improvement of the present invention, the water-cooling filter cabinet 1 includes a high-voltage high-power water-cooling reactor 101, a circulating reactor module 102, a turbulent fan 103, and a filter cabinet body 104; the high-voltage high-power water-cooling reactor 101 is arranged at the lower side inside the filter cabinet 104 and is fixedly arranged on a channel steel base of the filter cabinet through bolts; the circulating reactor module 102 is arranged above the high-voltage high-power water-cooling reactor 1, clamped and fixed by a screw rod and an insulating support, and then fixedly arranged on left and right fixed beams of the filter cabinet body by bolts; the turbulent flow fan 103 is arranged at the upper part of the door of the filter cabinet 104, and is preferably arranged at the rear of the matched filter screen group; the high-voltage high-power water-cooling reactor 101, the circulating reactor module 102 and the turbulent fan 103 are fixedly arranged at the corresponding positions of the filter cabinet 104 in a connection mode of bolts, guide rails and the like.
Example 3: referring to fig. 2-4, as an improvement of the present invention, the high-voltage high-power water-cooling reactor 101 suppresses surge voltage and surge current, protects the frequency converter, prolongs the service life thereof, prevents harmonic interference, improves the power factor of the frequency converter, suppresses harmonic current, filters harmonic voltage and harmonic current, not only prevents interference from the power grid, but also reduces pollution of the harmonic current generated by the rectifying unit to the power grid; the novel water-electricity separation type foil winding process reactor is adopted, so that the heat dissipation problem caused by a high-power reactor is further solved, and the overall space utilization rate is improved by matching with a 'frequency converter based on a double-bridge arm power unit' water-cooling heat dissipation system; the high-voltage high-power water-cooling reactor 101 is arranged at the lower side inside the filter cabinet 104. The turbulent flow fan solves the problem that effective air circulation cannot be formed outside due to the fact that the filter cabinet body is sealed, residual heat backlog is gradually caused inside, the filter cabinet body is installed at the front door and the back door of the filter cabinet body, the standard 16-fold cabinet body section bar is adopted, and the load bearing capacity of the cabinet body is increased through structural optimization designs of cabinet body parallel connection, channel steel, angle steel parallel connection, reinforcement and the like. Fig. 4 is a schematic diagram of a high-voltage high-power water-cooled reactor, which adopts a water-electricity separation type structure, a water-cooled radiator is embedded, cooling circulating water is isolated from a high-voltage coil, water quality and safety requirements are reduced, and the overall cost is saved by matching with a frequency converter heat dissipation system.
Example 4: referring to fig. 3, as an improvement of the present invention, the loop reactor module 102 adopts three groups of six air-core reactors, 2 groups of wire inlet ends are connected to the water-cooled reactor 1 in series-parallel through the copper bar 1, and wire outlet ends are connected to the bridge arm parallel rectifying frequency converter system in series-parallel through the copper bar 2, so as to inhibit harmonic interference caused by long-distance input of the bridge arm parallel rectifying frequency converter system, balance input current of the bridge arm parallel frequency converter, and further provide a more stable operation condition of the frequency converter system based on double bridge arm power units; the loop reactor module 102 is mounted on the upper side inside the filter cabinet 104.
Embodiment 5 referring to fig. 5, as an improvement of the present invention, the water-cooled excitation winding system cabinet 4 includes a three-phase 6-pulse scr rectifying module 401, an overvoltage absorption protection module 402, a control module 403, a dual-system switching module 404, and an excitation winding cabinet 405; the three-phase 6-pulse silicon controlled rectifier module 401 is arranged and installed on the left/middle side of the upper part of the exciting winding cabinet 405 through a sliding rail and a bolt, and the overvoltage absorption protection module 402 provides overvoltage absorption and protection functions for thyristors in the silicon controlled rectifier module 1 and is arranged on the right side of the upper part of the exciting winding cabinet 405; the control module 403 provides control, transmission and triggering functions, and is arranged at the lower part of the three-phase 6-pulse silicon controlled rectifier module 401 through bolts; the dual-system switching module 404 is composed of multiple switching knife switches and is arranged at the rear side of the control module 403 through bolts; the three-phase 6-pulse silicon controlled rectifier module 401, the overvoltage absorption protection module 402, the control module 403 and the dual-system switching module 404 are fixedly arranged at corresponding positions of the exciting winding cabinet 405 in a bolt and guide rail connection mode.
Embodiment 6 referring to fig. 6, as an improvement of the present invention, the three-phase 6-pulse scr rectifying module 401 includes a water-cooled radiator 4011, a unit housing 4012, three double-tube thyristors 4013, a resistive-capacitive absorber 4014, and a pulse power amplifier board 4015; the three double-tube thyristors 4013, the resistance-capacitance absorber 4014 and the pulse power amplifier board 4015 are arranged on one side of the water-cooling radiator 101 through bolts, and functional connection is completed through a copper bar mode. A temperature detection PT4016 is arranged on the water-cooled radiator 4011, bolts are selected and directly fixed at the upper and lower middle of the water-cooled radiator 101 near the inlet and outlet sides to provide a radiator temperature signal; three pulse power amplifier boards 4105 are provided, and each pulse power amplifier board 4015 respectively triggers and controls the function action of the corresponding silicon controlled rectifier 4013; the double-tube silicon controlled rectifier 4013 and the resistance-capacitance absorber 4014 are connected with each other through a connecting copper bar, the whole body, the water-cooling radiator 4011 and the unit housing 4012 are designed into a silicon controlled rectifier assembly module unit 401, and the silicon controlled rectifier assembly module unit is arranged and installed on the left/middle side of the upper portion of the exciting winding cabinet 405 through a sliding rail and a bolt.
Embodiment 7 referring to fig. 6, as an improvement of the present invention, the rc absorber 4104 comprises six absorption capacitors and six absorption resistors, which are distributed in parallel and in series on each of the copper bars connected with the thyristors, and parameter adjustment is achieved by changing the parallel and series connection mode according to the actual working conditions. The absorption capacitor is a novel film capacitor, is directly arranged on a copper bar connected with the controllable silicon 4013 in a short distance through a cable, a bolt, a copper bar and the like, is directly designed and arranged on a corresponding runner of the water-cooling radiator 4011 through a bolt to dissipate heat, so that the resistance-capacitance absorption 4014 effect is improved, and the system reliability is effectively improved.
Example 8 referring to fig. 6, as an improvement of the present invention, the water-cooled radiator 4011 is designed as a double-sided mounting structure; the three double-tube silicon controlled rectifier 4013, the resistance-capacitance absorber 4014 and the pulse power amplifier board 4015 are arranged on one side of the water-cooling radiator 4011 and are connected through copper bars and the like, components and devices can be assembled on each side through different numbers and forms, and the single/double-set three-phase six-pulse silicon controlled rectifier exciting winding function is realized according to requirements.
Embodiment 9 referring to fig. 6, the overvoltage absorption protection module is composed of a piezoresistor, a fast fuse and a rectifier bridge, and is connected to the system ac inlet side behind the three-phase six-pulse silicon controlled rectifier module through a cable and a bolt, so that a stable and reliable overvoltage absorption protection function is realized, the peak voltage of system ac is absorbed more effectively and fast, di/dt is reduced, and the silicon controlled rectifier is protected.
Embodiment 10 referring to fig. 6, as an improvement of the present invention, the control module 403 is composed of a pulse distribution board, a relay, a switching power supply, an insulation monitor, a temperature monitor, and a voltage transformer, where the pulse distribution board, the relay, the switching power supply, the insulation monitor, the temperature monitor, and the voltage transformer are assembled on a mounting board to form a control module; the control module 403 controls and transmits through electrical elements such as a pulse distribution plate and a relay, transmits and receives signals to the all-digital regulation system cabinet through optical fibers, receives the temperature detection temperature of the radiator through the temperature monitor, and detects the system voltage through the voltage transformer, so that the system components of the silicon controlled rectifier module are controlled and triggered, the system stability is further ensured, and the system reliability is improved.
Embodiment 11 referring to fig. 6, as an improvement of the present invention, the dual-system switching module 404 is composed of a multi-path switch, and the switch can quickly switch between different excitation winding systems. The system configuration of a plurality of sets of excitation winding systems of the three-level high-voltage high-power water-cooling frequency converter system and the switching requirement of a plurality of excitation systems can be flexibly met.
The water-cooling filter cabinet adopts the high-voltage high-power water-cooling reactor, so that input higher harmonic waves can be reduced, the filter is used for smooth filtering, a frequency converter is effectively protected, the power factor is effectively improved, interference from a power grid can be prevented, and pollution of harmonic current generated by a rectifying unit to the power grid can be reduced; the novel water-electricity separation type foil winding process water-cooling reactor is adopted in the high-voltage high-power water-cooling reactor, so that the heat dissipation problem caused by the high-power reactor is further solved, and the overall space utilization rate is improved by matching with a 'frequency converter based on a double-bridge arm power unit' water-cooling heat dissipation system; the loop reactor module is arranged to inhibit harmonic interference caused by ultra-long distance input of the bridge arm parallel system, balance input current of the bridge arm parallel frequency converter, and further provide a more stable operation condition of the frequency converter system based on the double bridge arm power units. The modular design of each component of the excitation winding system cabinet can realize the installation and maintenance more quickly; the function expansion of the single/double three-phase 6-pulse silicon controlled rectifier excitation winding system and the switching of different excitation winding systems are realized, meanwhile, corresponding overvoltage absorption protection, control system and other system modules are integrated, the stable operation of the equipment is protected, and the reliability of the system is greatly improved.
The invention also makes it possible to combine at least one of the technical features described in examples 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 with example 1 to form a new embodiment.
It should be noted that the above-mentioned embodiments are not intended to limit the scope of the present invention, and equivalent changes or substitutions made on the basis of the above-mentioned technical solutions fall within the scope of the present invention as defined in the claims.
Claims (8)
1. A three-level high-voltage high-power water-cooled frequency converter system, comprising: the system comprises a water-cooling filter cabinet, an expandable bridge arm parallel frequency converter cabinet, a full digital adjusting cabinet, a water-cooling excitation winding system cabinet and a water circulation heat dissipation system cabinet; the water-cooling filter cabinet, the expandable bridge arm parallel frequency converter cabinet, the all-digital adjusting cabinet, the water-cooling excitation winding system cabinet and the water circulation heat dissipation system cabinet are mutually assembled from left to right to form a set of three-level high-voltage high-power water-cooling frequency converter system,
the water-cooling filter cabinet comprises a high-voltage high-power water-cooling reactor, a circulating reactor module, a turbulent fan and a filter cabinet body; the high-voltage high-power water-cooling reactor is arranged at the lower side in the filter cabinet body; the circulating reactor modules are arranged on left and right fixed beams of the filter cabinet body; the turbulent flow fan is arranged at the upper part of the filter cabinet door; the high-voltage high-power water-cooling reactor, the circulating reactor module and the turbulent fan are arranged at corresponding positions of the filter cabinet body through connecting mechanisms, and the water-cooling excitation winding system cabinet comprises a three-phase 6-pulse silicon controlled rectifier module, an overvoltage absorption protection module, a control module, a double-system switching module and an excitation winding cabinet body; the three-phase 6-pulse silicon controlled rectifier module is arranged and installed on the left side or the middle side of the upper part of the exciting winding cabinet body, the overvoltage absorption protection module is arranged on the right side of the upper part of the exciting winding cabinet body, and the control module is arranged on the lower part of the three-phase 6-pulse silicon controlled rectifier module; the dual-system switching module is arranged at the rear side of the control module; the three-phase 6-pulse silicon controlled rectifier module, the overvoltage absorption protection module, the control module and the dual-system switching module are arranged at corresponding positions of the excitation winding cabinet through connecting mechanisms.
2. The three-level high-voltage high-power water-cooled frequency converter system of claim 1, wherein the high-voltage high-power water-cooled reactor is a novel water-electricity separation type foil winding process water-cooled reactor.
3. The three-level high-voltage high-power water-cooled frequency converter system according to claim 2, wherein the circulating reactor module consists of six hollow reactors, two hollow reactors are combined into a group, the wire inlet end is connected to the water-cooled reactor in series-parallel through a copper bar, and the wire outlet end is connected to the bridge arm parallel rectifying frequency converter system in series-parallel through a copper bar.
4. The three-level high-voltage high-power water-cooled frequency converter system according to claim 1, wherein the three-phase 6-pulse silicon controlled rectifier module comprises a water-cooled radiator, a unit shell, a silicon controlled rectifier, a resistance-capacitance absorber, a pulse power amplifier board, wherein the silicon controlled rectifier, the resistance-capacitance absorber and the pulse power amplifier board are arranged on one side of the water-cooled radiator through a connecting mechanism.
5. The three-level high-voltage high-power water-cooled frequency converter system according to claim 4, wherein the water-cooled radiator is designed into a double-sided installation structure, the silicon controlled rectifier is three double-tube silicon controlled rectifiers which are respectively installed on three copper bars, the resistance-capacitance absorber comprises six absorption capacitors and six absorption resistors, and the resistance-capacitance absorber is distributed on each copper bar connected with each silicon controlled rectifier in a series-parallel connection mode.
6. The three-level high-voltage high-power water-cooled frequency converter system according to claim 5, wherein the resistance-capacitance absorber is a novel film capacitor, the novel film capacitor is arranged on a copper bar connected with a silicon controlled rectifier through a connecting mechanism, and the absorption resistor is arranged at a place corresponding to a flow passage of the water-cooled radiator through a bolt.
7. The three-level high-voltage high-power water-cooled inverter system according to claim 4, further comprising a temperature monitor PT installed at a position near an inlet and an outlet from the upper and lower centers of the water-cooled radiator through a connection mechanism.
8. The three-level high-voltage high-power water-cooled frequency converter system according to claim 1, wherein the control module consists of a pulse distribution plate, a relay, a switching power supply, an insulation monitor, a temperature monitor and a voltage transformer, and the pulse distribution plate, the relay, the switching power supply, the insulation monitor, the temperature monitor and the voltage transformer are assembled on a mounting plate to form the control module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811642075.4A CN109474188B (en) | 2018-12-29 | 2018-12-29 | Three-level high-voltage high-power water-cooling frequency converter system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811642075.4A CN109474188B (en) | 2018-12-29 | 2018-12-29 | Three-level high-voltage high-power water-cooling frequency converter system |
Publications (2)
| Publication Number | Publication Date |
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| CN109474188A CN109474188A (en) | 2019-03-15 |
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