CN109245563A - A kind of power cabinet for large capacity synchronous machine stationary frequency starting - Google Patents
A kind of power cabinet for large capacity synchronous machine stationary frequency starting Download PDFInfo
- Publication number
- CN109245563A CN109245563A CN201811357103.8A CN201811357103A CN109245563A CN 109245563 A CN109245563 A CN 109245563A CN 201811357103 A CN201811357103 A CN 201811357103A CN 109245563 A CN109245563 A CN 109245563A
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- cabinet
- thyristor
- frame
- bolt
- direct current
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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
-
- 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
- H05K7/20909—Forced ventilation, e.g. on heat dissipaters coupled to components
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Power Engineering (AREA)
- Rectifiers (AREA)
- Motor And Converter Starters (AREA)
Abstract
The invention discloses a kind of power cabinets for large capacity synchronous machine stationary frequency starting, belong to Semiconductor Converting Technology and Electrified Transmission field.The power cabinet includes flat wave direct current reactor cabinet, the flat wave direct current reactor cabinet side is fixedly connected with three-phase fully-controlled thyristor rectifier cubicle, the other side is fixedly connected with thyristor inverter cabinet, three-phase fully-controlled thyristor rectifier cubicle is identical with the structure in thyristor inverter cabinet, by two flat wave direct current reactors in flat wave direct current reactor cabinet, the commutating circuit in three-phase fully-controlled thyristor rectifier cubicle is connected with the inversion circuit in thyristor inverter cabinet；Power cabinet provided by the present invention, rationally distributed, compact-sized, simple, thyristor mould group is an entirety, and later maintenance is simple, the requirement in series or in parallel of the thyristor mould group of high-voltage large current needed for can satisfy the synchronous motor startup of large capacity.
Description
Technical field
The invention belongs to Semiconductor Converting Technologies and Electrified Transmission field, and in particular to one kind is quiet for large capacity synchronous machine
The only power cabinet of varying frequency starting.
Background technique
Currently, Large Synchronous Machine is the key equipment of national economy, its soft start generally uses stationary frequency starting
(LCI, Load Commutated Inverter, i.e. load commutated formula current source type variable frequency device) device, by motor operation to together
After walking revolving speed, switching is incorporated into the power networks.Stationary frequency starting (LCI) device is that three-phase alternating current is passed through thyristor full-bridge rectification,
Become middle dc voltage, using thyristor inverter bridge group, becomes the three-phase alternating current supply motor of voltage and changeable frequency
Stator winding achievees the purpose that start motor, by motor operation to synchronous rotational speed.Starting for the synchronous motor of large capacity,
Its voltage is high, and electric current is big, needs rectification module serial or parallel connection, this just makes, and frequency Controlled Starting System equipment is more, takes up a large area, event
Barrier rate is high, maintenance is big.
Summary of the invention
In view of the above-mentioned problems, the purpose of the present invention is to provide a kind of function for large capacity synchronous machine stationary frequency starting
Rate cabinet is used for High-power Synchronous Motor frequency control using stationary frequency starting (LCI) device.
A kind of power cabinet for large capacity synchronous machine stationary frequency starting, including flat wave direct current reactor cabinet are described flat
Wave direct current reactor cabinet side is fixedly connected with three-phase fully-controlled thyristor rectifier cubicle, and the flat wave direct current reactor cabinet other side is fixed
Thyristor inverter cabinet is connected, wherein three-phase fully-controlled thyristor rectifier cubicle is identical with the structure in thyristor inverter cabinet, flat wave
It include two flat wave direct current reactors in direct current reactor cabinet, by flat wave direct current reactor by three-phase fully-controlled thyristor rectifier cubicle
In commutating circuit connected with the inversion circuit in thyristor inverter cabinet.
By taking the thyristor inverter cabinet as an example, the thyristor inverter cabinet includes cabinet body, thyristor mould group, blower, triggering
And Signals Transfer Board, capacitor, resistance, detection module and wind collecting unit；Wherein triggering and Signals Transfer Board, capacitor and resistance are located at institute
The top of interior of the cabinet is stated, thyristor mould group, detection module and wind collecting unit are located at the middle part of the interior of the cabinet, and blower is located at institute
State the lower part of interior of the cabinet.
The present invention has the advantages that
1, a kind of power cabinet for large capacity synchronous machine stationary frequency starting provided by the present invention, it is compact-sized, simple
Single, thyristor mould group is an entirety, and later maintenance is simple, high voltage needed for can satisfy the synchronous motor startup of large capacity
The requirement in series or in parallel of the thyristor mould group of high current.
2, a kind of power cabinet for large capacity synchronous machine stationary frequency starting provided by the present invention, is made using thyristor
For thyristor power unit main components, cheap, reliable performance；Wherein the pulse-triggered of thyristor is touched using light pulse
Hair system, the medium that light pulse triggering system transmits optical fiber as signal, realizes the isolation of high and low pressure current potential, it is easier to real
The triggering of existing thyristor and condition monitoring have higher anti-interference with optical pulse triggering system, and that improves power cabinet can
By property.
3, a kind of power cabinet for large capacity synchronous machine stationary frequency starting provided by the present invention, it is rationally distributed, lead to
Duct design is reasonable, and equipment failure rate is low, improves the reliability and stability of synchronous motor soft start.
Detailed description of the invention
Fig. 1 is a kind of power cabinet side view distribution map for large capacity synchronous machine stationary frequency starting of the present invention；
Fig. 2 is a kind of positive side view of power cabinet for large capacity synchronous machine stationary frequency starting of the present invention；
Fig. 3 is a kind of power cabinet right view for large capacity synchronous machine stationary frequency starting of the present invention.
In figure:
1, cabinet body；2, thyristor mould group；3, blower；
4, triggering and Signals Transfer Board；5, capacitor；6, resistance；
7, detection module；8, wind collecting unit；9, flat wave direct current reactor.
Specific embodiment
Power cabinet provided by the present invention is described in detail with reference to the accompanying drawings and examples.
The present invention provides a kind of power cabinet for large capacity synchronous machine stationary frequency starting, using stationary frequency starting
(LCI) device is used for High-power Synchronous Motor frequency control, is the frequency converter of cross-straight-intersection current source type, described to be used for large capacity
The power cabinet of synchronous machine stationary frequency starting (LCI) is simple, cost economy, special in several megawatt-grade high-power regulator drives
It is not high voltage, is widely applied in high-revolving high-power transmission.Wherein three-phase fully-controlled thyristor rectifier cubicle and thyristor inversion
The thyristor that cabinet uses is all made of light pulse triggering system, and high and low pressure side is isolated, and has power cabinet system very strong anti-interference
Ability.Due to circuit structure, it is not necessarily to any adjunct circuit, described power cabinet itself is adapted to four quadrant running, it may be assumed that
Forward and reverse operation and braking.
The present invention provides a kind of power cabinet for large capacity synchronous machine stationary frequency starting, including flat wave direct current reactor
Cabinet, the flat wave direct current reactor cabinet side are fixedly connected with three-phase fully-controlled thyristor rectifier cubicle, the flat wave direct current reactor cabinet
The other side is fixedly connected with thyristor inverter cabinet, and wherein the structure in three-phase fully-controlled thyristor rectifier cubicle and thyristor inverter cabinet is complete
It is identical, make to form commutating circuit in three-phase fully-controlled thyristor rectifier cubicle by electrical connection, forms inversion in thyristor inverter cabinet
Circuit, interior flat wave direct current reactor cabinet includes two flat wave direct current reactors, by flat wave direct current reactor that three-phase fully-controlled is brilliant
Commutating circuit in brake tube rectifier cabinet is connected with the inversion circuit in thyristor inverter cabinet, as shown in Figure 1.
As shown in Figures 2 and 3, by taking the thyristor inverter cabinet as an example, the thyristor inverter cabinet includes cabinet body 1, brilliant lock
Pipe die group 2, blower 3, triggering and Signals Transfer Board 4, capacitor 5, resistance 6, detection module 7 and wind collecting unit 8, thyristor mould group 2 are wrapped
Include bolt, disk spring, screw set, bolt topmast bracer, thin insulating, thyristor, copper radiator, heavy insulation and branch
Support frame frame；Wherein triggering and Signals Transfer Board 4, capacitor 5 and resistance 6 are located at the top inside the cabinet body 1, thyristor mould group 2,
Detection module 7 and wind collecting unit 8 are located at the middle part inside the cabinet body 1, and blower 3 is located at the lower part inside the cabinet body 1, and top is
Resistance-capacitance absorption area, middle part are thyristor working regions in wind collecting unit 8 and thyristor mould group 2, and wind collecting unit 8 forms air-out passage, right
The thyristor to generate heat in thyristor mould group 2 is cooled down, and lower part is the cooling air inlet region of blower 3.The cabinet body is by KB cabinet frame work
It is welded.
The thyristor mould group 2 includes braced frame and three complete pressure heaps；The braced frame includes frame subiculum
Frame, frame facet insulating supporting, frame mid portion insulating supporting and frame upper cover plate；The frame bottom bracket by steel plate weld and
At for placing complete pressure heap；There are two frame facet insulating supportings, is respectively inserted under frame according to symmetrical mode
In the fixation hole at bracket both ends；There are two frame mid portion insulating supportings, is respectively inserted on frame bottom bracket at two trisection points
Fixation hole in.Braced frame is divided into the sky of left, center, right three together by frame facet insulating supporting and frame mid portion insulating supporting
Between.The medial surface of frame facet insulating supporting has the level trough of support copper radiator；The left and right two of frame mid portion insulating supporting
A face all has the level trough of support copper radiator；The frame upper cover plate is welded by steel plate, is insulated with frame facet
It supports and is fixedly connected at the top of frame mid portion insulating supporting, form complete braced frame.
It includes bolt, disk spring, screw set, bolt topmast bracer, thin insulating that heap is pressed in the thyristor mould group 2
Son, thyristor, copper radiator and heavy insulation are sub, and a complete pressure heap is respectively arranged in the space of braced frame left, center, right three,
Totally three complete pressure heaps, and each complete pressure heap links together with braced frame respectively, the complete pressure in left, center, right three
Pile structure layout is just the same, and specific layout is by taking heap is completely pressed in left side as an example, in the frame subiculum of braced frame leftward space
Disk spring is placed on the through-hole of frame upper surface, there is spring through-hole among disk spring, disk spring is in original state at this time；
Spring through-hole among disk spring is inserted into screw set, and screw set upper half left-hand thread lives disk spring；Screw set
Lower half is provided with along axial direction and rises as high as the banks, and rises as high as the banks and does not rotate with frame bottom bracket surface through-hole with guarantee screw set is merged, spiral shell
Rod set part can be moved up and down relative to the surface through-hole；There is tapped through hole, from frame bottom bracket among screw set
Bolt is screwed in the tapped through hole among screw set by lower surface, and bolt is screwed out from the tapped through hole among screw set, directly
Expose above screw set after a distance to bolt, places bolt topmast bracer, bolt topmast bracer and spiral shell in bolt end head
The one side of bolt touching is spherical concave surface, and top surface is plane, is horizontally arranged thin insulating in the plane of bolt topmast bracer later,
It is sequentially placed copper radiator and thyristor again, the two is alternately arranged；Wherein thin insulating is dissipated for the copper for bottom electrification of insulating
Hot device and bolt topmast bracer, all copper radiator sizes are identical, and all thyristor sizes are identical.Finally it is being located at
Heavy insulation is placed in the upper surface of the copper radiator of the top, and heavy insulation is used for the copper radiator and frame topmost charged that insulate
Frame upper cover plate；Continue to rotate bolt, by the cooperation between bolt, screw set and disk spring, by all copper radiators and
All thyristors are crimped together to form complete pressure heap.The present invention utilizes (silicon-controlled) mould for power device of thyristor
Module unit, rationally distributed, compact-sized, power density is high, output current capacity is strong, and can not only be used for rectification module can also be used as
Inverter module come using.
After thyristor mould group 2 is fixed on 1 middle part of cabinet body, blower 3 is installed in the lower part of cabinet body 1, cold when blower 3 works
But air vertical direction blasts wind collecting unit 8, and the cooling air in wind collecting unit 8 is again laterally across the sheet gap of copper radiator, warm
Air is brought to 2 rear of thyristor mould group and top, is discharged by the shutter at the top of cabinet body and rear portion, reaching makes thyristor exist
Temperature rise is low when work, the purpose of good heat dissipation.
Triggering and Signals Transfer Board 4 are for controlling thyristor pulse-triggered, and thyristor triggers system using light pulse, by light
The fine medium as signal transmitting, realizes the isolation of high and low pressure current potential, it is easier to realize triggering and the condition monitoring of thyristor,
There is higher anti-interference with optical pulse triggering system, improve the reliability of power cabinet.
Capacitor 5 and resistance 6 form resistance-capacitance absorption circuit in Fig. 3, are located at 1 top of cabinet body, are used for overvoltage protection, its hair
Heat can be discharged outside cabinet by air duct together with the heat of thyristor.
Detection module 7 is side currents detecting element, is directly accessed in alternating current bus bar, be will test after progress current detecting
Current data is transferred to thyristor control system.
Thyristor in three-phase fully-controlled thyristor rectifier cubicle is identical with the thyristor in thyristor inverter cabinet, structure cloth
Office is same, by different electric connecting modes, makes the rectification that rectified action has been formed in three-phase fully-controlled thyristor rectifier cubicle
Circuit makes the inversion circuit that reversion reaction has been formed in thyristor inverter cabinet, includes two flat waves in flat wave direct current reactor cabinet
Direct current reactor 9, by flat wave direct current reactor 9 by three-phase fully-controlled thyristor rectifier cubicle commutating circuit and thyristor inversion
Inversion circuit in cabinet connects, and limits the current-rising-rate of DC bus in flat wave direct current reactor cabinet, realizes flat wave limit
Stream.
It is grasped by the analysis to the power cabinet architectural characteristic provided by the present invention for large capacity stationary frequency starting,
The power cabinet is the design carried out for large capacity synchronous machine stationary frequency starting (LCI), and power density is high, compact-sized,
It is strong to export current capacity, Duct design and rationally distributed, and replacement can be met well and safeguard the requirement of blower 3.
Claims (6)
1. a kind of power cabinet for large capacity synchronous machine stationary frequency starting, which is characterized in that including flat wave direct current reactor
Cabinet, the flat wave direct current reactor cabinet side are fixedly connected with three-phase fully-controlled thyristor rectifier cubicle, the flat wave direct current reactor cabinet
The other side is fixedly connected with thyristor inverter cabinet, and wherein the structure in three-phase fully-controlled thyristor rectifier cubicle and thyristor inverter cabinet is complete
It is identical, it include two flat wave direct current reactors in flat wave direct current reactor cabinet, it is by flat wave direct current reactor that three-phase fully-controlled is brilliant
Commutating circuit in brake tube rectifier cabinet is connected with the inversion circuit in thyristor inverter cabinet；
By taking the thyristor inverter cabinet as an example, the thyristor inverter cabinet includes cabinet body, thyristor mould group, blower, triggering and letter
Number pinboard, capacitor, resistance, detection module and wind collecting unit；Wherein triggering and Signals Transfer Board, capacitor and resistance are located at the cabinet
The top in internal portion, thyristor mould group, detection module and wind collecting unit are located at the middle part of the interior of the cabinet, and blower is located at the cabinet
The lower part in internal portion.
2. a kind of power cabinet for large capacity synchronous machine stationary frequency starting as described in claim 1, which is characterized in that institute
Stating thyristor mould group includes braced frame and three complete pressure heaps；The braced frame includes frame bottom bracket, frame facet
Insulating supporting, frame mid portion insulating supporting and frame upper cover plate；The frame bottom bracket is welded by steel plate, for having placed
Whole pressure heap；There are two frame facet insulating supportings, is respectively inserted in consolidating for frame bottom bracket both ends according to symmetrical mode
Determine in hole；There are two frame mid portion insulating supportings, is respectively inserted in the fixation hole on frame bottom bracket at two trisection points；Frame
Braced frame is divided into the space of left, center, right three together by the support of frame side insulation and frame mid portion insulating supporting；Frame facet is exhausted
The medial surface of edge support has the level trough of support copper radiator；The face of left and right two of frame mid portion insulating supporting all has support
The level trough of copper radiator；The frame upper cover plate is welded by steel plate, with frame facet insulating supporting and frame mid portion
It is fixedly connected at the top of insulating supporting, forms complete braced frame；
It includes bolt, disk spring, screw set, bolt topmast bracer, thin insulating, brilliant lock that heap is pressed in the thyristor mould group
Pipe, copper radiator and heavy insulation are respectively arranged a complete pressure heap in the space of braced frame left, center, right three, totally three it is complete
Whole pressure heap, and each complete pressure heap links together with braced frame respectively, the complete pressure pile structure cloth in left, center, right three
Office is just the same, and specific layout is by taking heap is completely pressed in left side as an example, in the frame bottom bracket upper surface of braced frame leftward space
Disk spring is placed on through-hole, and there is spring through-hole among disk spring；Spring through-hole among disk spring is inserted into spiral shell
Rod set part, screw set upper half left-hand thread live disk spring；Screw set lower half is provided with along axial direction rises as high as the banks, rise as high as the banks under frame
The cooperation of bracket surface through-hole, screw set do not rotate, and screw set can be moved up and down relative to the surface through-hole；
There is tapped through hole among screw set, screw in the tapped through hole among screw set from frame bottom bracket lower surface by bolt,
Bolt is screwed out from the tapped through hole among screw set, until bolt exposes above screw set after a distance, in bolt
The one side of top placement bolt topmast bracer, bolt topmast bracer and threaded bolt contacts is spherical concave surface, and top surface is plane, Zhi Hou
It is horizontally arranged thin insulating in the plane of bolt topmast bracer, then is sequentially placed copper radiator and thyristor, the two is alternately arranged；
Wherein copper radiator and bolt topmast bracer of thin insulating for bottom electrification of insulating, all complete phases of copper radiator size
Together, all thyristor sizes are identical；Heavy insulation finally is placed in the upper surface for being located at the copper radiator of the top, it is thick absolutely
Edge is used for the copper radiator and frame upper cover plate topmost charged that insulate；Continue to rotate bolt, by bolt, screw set and
All copper radiators and all thyristors are crimped together to form complete pressure heap by the cooperation between disk spring.
3. a kind of power cabinet for large capacity synchronous machine stationary frequency starting as claimed in claim 2, which is characterized in that institute
It states thyristor and uses light pulse triggering mode, the medium that optical fiber is transmitted as signal.
4. a kind of power cabinet for large capacity synchronous machine stationary frequency starting as described in claim 1, which is characterized in that when
When blower works, cooling air vertical direction blasts wind collecting unit, and the cooling air in wind collecting unit is again laterally across copper radiator
Sheet gap, hot-air are brought to thyristor mould group rear and top, are discharged by the top of cabinet body and rear portion.
5. a kind of power cabinet for large capacity synchronous machine stationary frequency starting as described in claim 1, which is characterized in that institute
Cabinet body is stated to be welded by KB cabinet frame work.
6. a kind of power cabinet for large capacity synchronous machine stationary frequency starting as described in claim 1, which is characterized in that inspection
It surveys module to be directly accessed in alternating current bus bar, the current data will test after current detecting is transferred to thyristor control system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811357103.8A CN109245563B (en) | 2018-11-15 | 2018-11-15 | Power cabinet for static frequency conversion starting of large-capacity synchronous machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811357103.8A CN109245563B (en) | 2018-11-15 | 2018-11-15 | Power cabinet for static frequency conversion starting of large-capacity synchronous machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109245563A true CN109245563A (en) | 2019-01-18 |
| CN109245563B CN109245563B (en) | 2020-06-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811357103.8A Active CN109245563B (en) | 2018-11-15 | 2018-11-15 | Power cabinet for static frequency conversion starting of large-capacity synchronous machine |
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| Country | Link |
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| CN (1) | CN109245563B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112152424A (en) * | 2020-08-10 | 2020-12-29 | 常州博瑞电力自动化设备有限公司 | Compact air-cooled static frequency converter power cabinet |
| US20210273576A1 (en) * | 2018-07-20 | 2021-09-02 | Toshiba Mitsubishi-Electric Industrial Systems Corporation | Power conversion device |
| CN113765410A (en) * | 2021-09-10 | 2021-12-07 | 东方电气自动控制工程有限公司 | Synchronous motor load current conversion inverter equipment and control method thereof |
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| US20100328848A1 (en) * | 2009-06-30 | 2010-12-30 | Enrique Ledezma | Providing Modular Power Conversion |
| CN102097941A (en) * | 2010-12-30 | 2011-06-15 | 冶金自动化研究设计院 | Dual PWM (pulse width modulation) integrated gate commutated thyristor three-level power cabinet |
| CN203590000U (en) * | 2013-09-30 | 2014-05-07 | 天津瑞能电气有限公司 | Full power frequency converter |
| CN204349814U (en) * | 2014-12-18 | 2015-05-20 | 江苏方程电力科技有限公司 | A kind of photovoltaic DC-to-AC converter of integrated DC distribution |
| CN207677619U (en) * | 2017-12-13 | 2018-07-31 | 武汉合康电驱动技术有限公司 | A kind of parallel frequency changer of low-voltage module |
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Patent Citations (5)
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| US20100328848A1 (en) * | 2009-06-30 | 2010-12-30 | Enrique Ledezma | Providing Modular Power Conversion |
| CN102097941A (en) * | 2010-12-30 | 2011-06-15 | 冶金自动化研究设计院 | Dual PWM (pulse width modulation) integrated gate commutated thyristor three-level power cabinet |
| CN203590000U (en) * | 2013-09-30 | 2014-05-07 | 天津瑞能电气有限公司 | Full power frequency converter |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20210273576A1 (en) * | 2018-07-20 | 2021-09-02 | Toshiba Mitsubishi-Electric Industrial Systems Corporation | Power conversion device |
| US11901834B2 (en) * | 2018-07-20 | 2024-02-13 | Toshiba Mitsubishi-Electric Industrial Systems Corporation | Power conversion device supported by intersecting panel |
| CN112152424A (en) * | 2020-08-10 | 2020-12-29 | 常州博瑞电力自动化设备有限公司 | Compact air-cooled static frequency converter power cabinet |
| CN113765410A (en) * | 2021-09-10 | 2021-12-07 | 东方电气自动控制工程有限公司 | Synchronous motor load current conversion inverter equipment and control method thereof |
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| Publication number | Publication date |
|---|---|
| CN109245563B (en) | 2020-06-23 |
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