CN112713761A - Method and device for rapidly switching power unit of large-scale synchronizer - Google Patents
Method and device for rapidly switching power unit of large-scale synchronizer Download PDFInfo
- Publication number
- CN112713761A CN112713761A CN202110008918.0A CN202110008918A CN112713761A CN 112713761 A CN112713761 A CN 112713761A CN 202110008918 A CN202110008918 A CN 202110008918A CN 112713761 A CN112713761 A CN 112713761A
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- China
- Prior art keywords
- frequency converter
- switching
- siemens
- cabinet
- operating handle
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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
- H02M1/32—Means for protecting converters other than automatic disconnection
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
Abstract
The invention relates to a method and a device for rapidly switching a power unit of a large-scale synchronizer, belonging to the technical field of operation control of electric transmission equipment. The technical scheme of the invention is as follows: and the additional frequency converter incoming line cabinet and the frequency converter output cabinet are used for switching incoming lines of a high-voltage power supply and switching output of a power unit. The invention has the beneficial effects that: the novel electric power transmission device can be used when a large-scale electric power transmission device is locally transformed, the shutdown debugging time is almost reduced, normal production is not influenced, the frequency converter side is switched to when overhauling and debugging are carried out, the Siemens frequency converter side is switched to when normal production is carried out, the overhauling and debugging are carried out on the premise that normal production is guaranteed, and considerable benefits and good transformation effects are obtained.
Description
Technical Field
The invention relates to a method and a device for rapidly switching a power unit of a large-scale synchronizer, belonging to the technical field of operation control of electric transmission equipment.
Background
At present, a main motor of a rolling mill used in an acid rolling line of a cold rolling plant is a medium-voltage large-scale synchronous motor, a control system adopts a Siemens ML2 system, and a core control unit is a Simmetin D PM6 CPU.
Disclosure of Invention
The invention aims to provide a method for rapidly switching a power unit of a large-scale synchronizer, which is used for switching incoming lines of a high-voltage power supply and switching output of the power unit by newly adding a frequency converter (a domestic frequency converter), an incoming line cabinet of the additional frequency converter and an output cabinet of the additional frequency converter; the novel electric transmission device can be used when a large-scale electric transmission device is locally transformed, the shutdown debugging time is almost reduced, the normal production is not influenced, the device is switched to the frequency converter side when in maintenance and debugging, the device is switched to the Siemens frequency converter side when in normal production, the maintenance is utilized to debug on the premise of ensuring the normal production, considerable benefits and good transformation effects are obtained, and the problems existing in the background technology are effectively solved.
The technical scheme of the invention is as follows: a method for rapidly switching a power unit of a large-scale synchronizer comprises the following steps:
step 1: switching the incoming line of the high-voltage power supply comprises the following specific steps:
step 1-1: stopping the system, checking and confirming;
step 1-2: switching work is carried out on the incoming line cabinet of the frequency converter, and the incoming line cabinet is switched to a corresponding frequency converter side and a Siemens frequency converter side according to requirements;
step 1-3: switching to the step 1-5 according to the switching requirement, if the Siemens frequency converter side is switched to; if the frequency converter side is switched to be the frequency converter side, the operating handle is inserted into the operating mechanism, the operating handle is rotated anticlockwise, and after the operating handle is in place, the indicating plate on the frequency converter side displays red and displays in place;
step 1-4: observing the head condition through a window, and performing abnormal rotation to the step 1-3 and normal rotation to the step 2;
step 1-5: inserting an operating handle into the operating mechanism, rotating the operating handle clockwise, and displaying red on an indicating plate at the side of the Siemens frequency converter in place;
step 1-6: observing the head condition through a window, and abnormally turning to the step 1-5;
step 2: the switching selection output to the motor is operated in the output cabinet of the frequency converter, and the method comprises the following specific steps:
step 2-1: if the frequency converter side is switched to the Siemens frequency converter side according to the switching requirement, turning to the step 2-3, if the frequency converter side is switched to the Siemens frequency converter side, inserting an operating handle into an operating mechanism, rotating the operating handle anticlockwise, and after the operating handle is in place, displaying red on an indicating plate at the frequency converter side and displaying in place;
step 2-2: observing the head condition through a window, and performing abnormal rotation to the step 2-1 and normal rotation to the step 3;
step 2-3: inserting an operating handle into the operating mechanism, rotating the operating handle clockwise, and displaying red on an indicating plate at the side of the Siemens frequency converter in place;
step 2-4: observing the head condition through a window, and abnormally switching to the step 2-3;
step 2-5: observing the running condition of the system, and abnormally switching to the step 1;
and step 3: and finishing the switching.
A device for rapidly switching power units of a large-scale synchronizer comprises a high-voltage power supply incoming line, a frequency converter incoming line cabinet, a frequency converter output cabinet, a Siemens frequency converter, a frequency converter and a motor, wherein the frequency converter incoming line cabinet and the frequency converter output cabinet are consistent in size and internal structure, and each frequency converter incoming line cabinet and the frequency converter output cabinet respectively comprise a first isolating switch, a second isolating switch, a linkage mechanism, an operating handle, a deflector rod, a first output end, a second output end and an input end; the input end of the frequency converter incoming line cabinet is connected with a high-voltage power supply incoming line, and the first output end and the second output end are respectively connected with the Siemens frequency converter and the frequency converter; the first output end and the second output end of the frequency converter output cabinet are respectively connected with the Siemens frequency converter and the frequency converter, and the input end of the frequency converter output cabinet is connected with the motor;
the first isolating switch and the second isolating switch are connected through a linkage mechanism, the operating handle controls the linkage mechanism through the operating mechanism, and the first isolating switch and the second isolating switch are connected with the first output end, the second output end and the input end through a deflector rod.
The first isolating switch and the second isolating switch are 12kV knife switches.
The position of the driving lever indicates that the driving lever is respectively sent into external EPO signals of the Siemens frequency converter and the frequency converter after the contacts are connected in series.
The invention has the beneficial effects that: the novel frequency converter (made in China) is additionally provided with a frequency converter incoming cabinet and a frequency converter output cabinet, and the frequency converter incoming cabinet and the frequency converter output cabinet are used for switching incoming lines of a high-voltage power supply and switching output of a power unit; the novel electric power transmission device can be used when a large-scale electric power transmission device is locally transformed, the shutdown debugging time is almost reduced, normal production is not influenced, the frequency converter side is switched to when overhauling and debugging are carried out, the Siemens frequency converter side is switched to when normal production is carried out, the overhauling and debugging are carried out on the premise that normal production is guaranteed, and considerable benefits and good transformation effects are obtained.
Drawings
FIG. 1 is a system block diagram of the present invention;
FIG. 2 is an internal structural view of the input cabinet and output cabinet of the frequency converter of the present invention;
FIG. 3 is a dimensional structure diagram of the input cabinet and output cabinet of the frequency converter of the present invention;
FIG. 4 is a flow chart of the operation of the present invention;
in the figure: the device comprises a first isolating switch 1, a second isolating switch 2, a linkage mechanism 3, an operating mechanism 4, an operating handle 5, a deflector rod 6, a first output end 7, a second output end 8 and an input end 9.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions of the embodiments of the present invention with reference to the drawings of the embodiments, and it is obvious that the described embodiments are a small part of the embodiments of the present invention, rather than all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative work based on the embodiments of the present invention belong to the protection scope of the present invention.
A method for rapidly switching a power unit of a large-scale synchronizer comprises the following steps:
step 1: switching the incoming line of the high-voltage power supply comprises the following specific steps:
step 1-1: stopping the system, checking and confirming;
step 1-2: switching work is carried out on the incoming line cabinet of the frequency converter, and the incoming line cabinet is switched to a corresponding frequency converter side and a Siemens frequency converter side according to requirements;
step 1-3: switching to the step 1-5 according to the switching requirement, if the Siemens frequency converter side is switched to; if the frequency converter side is switched to be the frequency converter side, the operating handle is inserted into the operating mechanism, the operating handle is rotated anticlockwise, and after the operating handle is in place, the indicating plate on the frequency converter side displays red and displays in place;
step 1-4: observing the head condition through a window, and performing abnormal rotation to the step 1-3 and normal rotation to the step 2;
step 1-5: inserting an operating handle into the operating mechanism, rotating the operating handle clockwise, and displaying red on an indicating plate at the side of the Siemens frequency converter in place;
step 1-6: observing the head condition through a window, and abnormally turning to the step 1-5;
step 2: the switching selection output to the motor is operated in the output cabinet of the frequency converter, and the method comprises the following specific steps:
step 2-1: if the frequency converter side is switched to the Siemens frequency converter side according to the switching requirement, turning to the step 2-3, if the frequency converter side is switched to the Siemens frequency converter side, inserting an operating handle into an operating mechanism, rotating the operating handle anticlockwise, and after the operating handle is in place, displaying red on an indicating plate at the frequency converter side and displaying in place;
step 2-2: observing the head condition through a window, and performing abnormal rotation to the step 2-1 and normal rotation to the step 3;
step 2-3: inserting an operating handle into the operating mechanism, rotating the operating handle clockwise, and displaying red on an indicating plate at the side of the Siemens frequency converter in place;
step 2-4: observing the head condition through a window, and abnormally switching to the step 2-3;
step 2-5: observing the running condition of the system, and abnormally switching to the step 1;
and step 3: and finishing the switching.
A device for rapidly switching power units of a large-scale synchronizer comprises a high-voltage power supply incoming line, a frequency converter incoming line cabinet, a frequency converter output cabinet, a Siemens frequency converter, a frequency converter and a motor, wherein the frequency converter incoming line cabinet and the frequency converter output cabinet are consistent in size and internal structure, and each frequency converter incoming line cabinet and the frequency converter output cabinet respectively comprise a first isolating switch 1, a second isolating switch 2, a linkage mechanism 3, an operating mechanism 4, an operating handle 5, a deflector rod 6, a first output end 7, a second output end 8 and an input end 9; an input end 9 of the frequency converter incoming line cabinet is connected with a high-voltage power supply incoming line, and an output end I7 and an output end II 8 are respectively connected with the Siemens frequency converter and the frequency converter; the first output end 7 and the second output end 8 of the frequency converter output cabinet are respectively connected with the Siemens frequency converter and the frequency converter, and the input end 9 is connected with the motor;
the first isolating switch 1 and the second isolating switch 2 are connected through a linkage mechanism 3, an operating handle 5 controls the linkage mechanism 3 through an operating mechanism 4, and the first isolating switch 1 and the second isolating switch 2 are connected with a first output end 7, a second output end 8 and an input end 9 through a deflector rod 6.
The first isolating switch 1 and the second isolating switch 2 are 12kV knife switches.
The position of the driving lever 6 indicates that the driving lever is respectively sent into external EPO signals of a Siemens frequency converter and a frequency converter after the contacts are connected in series.
In practical application, the original system is completely reserved, a new frequency converter, an additional frequency converter incoming line cabinet and a frequency converter output cabinet are additionally arranged and used for switching power supply incoming lines and switching power unit output, a domestic system replaces a Siemens ML2 system, and a switching interface is switched between the frequency converter and the Siemens frequency converter.
The main power switching is divided into two parts, wherein one part switches the incoming line of a high-voltage power supply to be selected to a frequency converter and a Siemens frequency converter; and the other part switches the power output of the frequency converter made in China and the Siemens frequency converter to be selected to the motor.
The main power switching scheme adopts a frequency converter incoming cabinet and a frequency converter output cabinet, and two 12kV pole switches are adopted to realize the single-pole double-throw function.
Converter incoming line cabinet and converter output cabinet, the size is unanimous, and inner structure is unanimous, and the difference is on-the-spot wiring difference: the frequency converter incoming cabinet connects a high-voltage power supply incoming line to an input end 9, connects a Siemens frequency converter and a frequency converter circuit to an output end I7 and an output end II 8, and selects a power supply to enter the Siemens frequency converter or the frequency converter according to the states of a first isolating switch 1 and a second isolating switch 2.
And the first output end 7 and the second output end 8 of the frequency converter output cabinet are respectively connected with the Siemens frequency converter output and the frequency converter output, and the input end 9 is connected with the motor. And according to the states of the first isolating switch 1 and the second isolating switch 2, the power supply of the motor is selected to be provided by a Siemens frequency converter or a frequency converter.
Because converter incoming line cabinet and converter output cabinet belong to high-tension apparatus, major equipment and bodily injury accident can appear in the maloperation, in order to avoid the accident, do following design: the position of the shift lever is indicated in the external EPO signals of the Siemens frequency converter and the frequency converter after the contacts are connected in series, namely, if the operating handle is not taken out, the frequency converter cannot be started, and misoperation can be avoided. After the operating handle is taken out, the deflector rod is locked as long as the main power is electrified, the operating handle cannot be inserted again, and misoperation can be avoided.
The invention has the advantages that the normal production is not influenced, the frequency converter side is switched during the maintenance and debugging, and the Siemens frequency converter side is switched during the normal production, thereby being very convenient and fast. The daily production is not influenced, and the debugging can be carried out during the overhaul period. And good balance is achieved. Production and debugging are considered, meanwhile, the parking debugging time is greatly shortened, and the defect that the production is influenced by long-time parking in conventional transformation is overcome. The whole debugging work is divided into parts, and the debugging work can be finished during the daily maintenance. Meanwhile, when a fault occurs in the improved new system, the new system can be immediately switched to the Siemens system, and production is not affected. After troubleshooting and solving the problems, the system can be immediately switched to a domestic system to continue running and verifying. The design scheme obtains considerable benefits and good transformation effect. Provides a new method and thought for local equipment modification.
Claims (4)
1. A method for fast switching power units of a large-scale synchronizer is characterized by comprising the following steps:
step 1: switching the incoming line of the high-voltage power supply comprises the following specific steps:
step 1-1: stopping the system, checking and confirming;
step 1-2: switching work is carried out on the incoming line cabinet of the frequency converter, and the incoming line cabinet is switched to a corresponding frequency converter side and a Siemens frequency converter side according to requirements;
step 1-3: switching to the step 1-5 according to the switching requirement, if the Siemens frequency converter side is switched to; if the frequency converter side is switched to be the frequency converter side, the operating handle is inserted into the operating mechanism, the operating handle is rotated anticlockwise, and after the operating handle is in place, the indicating plate on the frequency converter side displays red and displays in place;
step 1-4: observing the head condition through a window, and performing abnormal rotation to the step 1-3 and normal rotation to the step 2;
step 1-5: inserting an operating handle into the operating mechanism, rotating the operating handle clockwise, and displaying red on an indicating plate at the side of the Siemens frequency converter in place;
step 1-6: observing the head condition through a window, and abnormally turning to the step 1-5;
step 2: the switching selection output to the motor is operated in the output cabinet of the frequency converter, and the method comprises the following specific steps:
step 2-1: if the frequency converter side is switched to the Siemens frequency converter side according to the switching requirement, turning to the step 2-3, if the frequency converter side is switched to the Siemens frequency converter side, inserting an operating handle into an operating mechanism, rotating the operating handle anticlockwise, and after the operating handle is in place, displaying red on an indicating plate at the frequency converter side and displaying in place;
step 2-2: observing the head condition through a window, and performing abnormal rotation to the step 2-1 and normal rotation to the step 3;
step 2-3: inserting an operating handle into the operating mechanism, rotating the operating handle clockwise, and displaying red on an indicating plate at the side of the Siemens frequency converter in place;
step 2-4: observing the head condition through a window, and abnormally switching to the step 2-3;
step 2-5: observing the running condition of the system, and abnormally switching to the step 1;
and step 3: and finishing the switching.
2. An apparatus for fast switching power units of a large-scale synchronizer, comprising: the high-voltage power supply incoming line frequency converter comprises a high-voltage power supply incoming line, a frequency converter incoming line cabinet, a frequency converter output cabinet, a Siemens frequency converter, a frequency converter and a motor, wherein the frequency converter incoming line cabinet and the frequency converter output cabinet are consistent in size and internal structure, and each frequency converter incoming line cabinet and each frequency converter output cabinet comprises a first isolating switch (1), a second isolating switch (2), a linkage mechanism (3), an operating mechanism (4), an operating handle (5), a deflector rod (6), a first output end (7), a second output end (8) and an input end (9); an input end (9) of the frequency converter incoming line cabinet is connected with a high-voltage power supply incoming line, and a first output end (7) and a second output end (8) are respectively connected with a Siemens frequency converter and a frequency converter; the output end I (7) and the output end II (8) of the frequency converter output cabinet are respectively connected with the Siemens frequency converter and the frequency converter, and the input end (9) is connected with the motor;
the first isolating switch (1) is connected with the second isolating switch (2) through the linkage mechanism (3), the operating handle (5) controls the linkage mechanism (3) through the operating mechanism (4), and the first isolating switch (1) and the second isolating switch (2) are connected with the first output end (7), the second output end (8) and the input end (9) through the deflector rod (6).
3. The apparatus of claim 2, wherein the apparatus for rapidly switching power units of a large synchronous machine comprises: the first isolating switch (1) and the second isolating switch (2) are 12kV knife switches.
4. The apparatus of claim 2, wherein the apparatus for rapidly switching power units of a large synchronous machine comprises: the position of the driving lever (6) indicates that the driving lever is respectively sent into external EPO signals of the Siemens frequency converter and the frequency converter after the contacts are connected in series.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110008918.0A CN112713761A (en) | 2021-01-05 | 2021-01-05 | Method and device for rapidly switching power unit of large-scale synchronizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110008918.0A CN112713761A (en) | 2021-01-05 | 2021-01-05 | Method and device for rapidly switching power unit of large-scale synchronizer |
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| Publication Number | Publication Date |
|---|---|
| CN112713761A true CN112713761A (en) | 2021-04-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110008918.0A Withdrawn CN112713761A (en) | 2021-01-05 | 2021-01-05 | Method and device for rapidly switching power unit of large-scale synchronizer |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104320039A (en) * | 2014-10-31 | 2015-01-28 | 武汉钢铁(集团)公司 | Drive control method and device of final dusting high-voltage motor of steel mill |
| CN206452179U (en) * | 2017-01-11 | 2017-08-29 | 山西科达富升智能控制技术有限公司 | A kind of high-voltage frequency converter of mine hoist redundancy stand-by provision |
| CN206712542U (en) * | 2017-05-25 | 2017-12-05 | 中天钢铁集团有限公司 | Dual power supply dual redundant high-voltage motor controls activation system |
| CN109639213A (en) * | 2018-11-29 | 2019-04-16 | 河南中鸿集团煤化有限公司 | A kind of blower variable frequency device fault secure circuit, method and its Distributed Control System |
| CN210183250U (en) * | 2019-08-29 | 2020-03-24 | 杭州临安华旺热能有限公司 | Double-frequency-converter switching control device |
-
2021
- 2021-01-05 CN CN202110008918.0A patent/CN112713761A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104320039A (en) * | 2014-10-31 | 2015-01-28 | 武汉钢铁(集团)公司 | Drive control method and device of final dusting high-voltage motor of steel mill |
| CN206452179U (en) * | 2017-01-11 | 2017-08-29 | 山西科达富升智能控制技术有限公司 | A kind of high-voltage frequency converter of mine hoist redundancy stand-by provision |
| CN206712542U (en) * | 2017-05-25 | 2017-12-05 | 中天钢铁集团有限公司 | Dual power supply dual redundant high-voltage motor controls activation system |
| CN109639213A (en) * | 2018-11-29 | 2019-04-16 | 河南中鸿集团煤化有限公司 | A kind of blower variable frequency device fault secure circuit, method and its Distributed Control System |
| CN210183250U (en) * | 2019-08-29 | 2020-03-24 | 杭州临安华旺热能有限公司 | Double-frequency-converter switching control device |
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Application publication date: 20210427 |
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