CN112260612B - Method for preventing discharge resistance temperature of main motor speed regulating system of wide and thick plate rolling mill from exceeding standard - Google Patents
Method for preventing discharge resistance temperature of main motor speed regulating system of wide and thick plate rolling mill from exceeding standard Download PDFInfo
- Publication number
- CN112260612B CN112260612B CN202010951323.4A CN202010951323A CN112260612B CN 112260612 B CN112260612 B CN 112260612B CN 202010951323 A CN202010951323 A CN 202010951323A CN 112260612 B CN112260612 B CN 112260612B
- Authority
- CN
- China
- Prior art keywords
- rolling mill
- discharge resistance
- steel plate
- resistance temperature
- direct current
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
- H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
- H02P29/60—Controlling or determining the temperature of the motor or of the drive
-
- 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
- H02P25/00—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details
- H02P25/16—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the circuit arrangement or by the kind of wiring
-
- 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
-
- 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
- H02P27/06—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 using dc to ac converters or inverters
-
- 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
- H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
- H02P29/02—Providing protection against overload without automatic interruption of supply
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Abstract
The invention discloses a method for preventing the discharge resistance temperature of a main motor speed regulating system of a wide and thick plate rolling mill from exceeding the standard, which relates to the technical field of steel production equipment, and when the discharge resistance temperature of a direct current bus exceeds 50 ℃, an early warning signal is displayed on an HMI picture of an operation console, and an acousto-optic alarm is matched; when the discharge resistance temperature of the direct current bus is higher than 75 ℃, temporarily forbidding the steel plate to enter the rolling mill, and when the discharge resistance temperature of the direct current bus is lower than 75 ℃, re-allowing the steel plate to enter the rolling mill; and temporarily forbidding the steel plate to enter the rolling mill when the discharge resistance temperature of the direct current bus exceeds 75 ℃ during even pass, and re-allowing the steel plate to enter the rolling mill when the discharge resistance temperature of the direct current bus is lower than 75 ℃. The effect is obvious, and the high-power AC-DC-AC speed regulation system for the main motor of the wide and thick plate rolling mill can be effectively protected.
Description
Technical Field
The invention relates to the technical field of steel production equipment, in particular to a method for preventing the discharge resistance temperature of a main motor speed regulating system of a wide and thick plate rolling mill from exceeding the standard.
Background
The main motor of the wide and thick plate mill is controlled by a high-power AC-DC-AC speed regulation system, a water-cooling discharge resistor is arranged for preventing the DC bus voltage of the system from being overhigh, and the temperature of the discharge resistor is about 30-40 ℃ during normal steel rolling; when the reduction amount is larger or the reduction rule is set unreasonably, the motor torque of each pass is continuously kept at the maximum torque value seriously, and the discharge resistance temperature of the direct current bus can be quickly increased. When the temperature of the discharge resistor exceeds 90 ℃, in order to protect the discharge resistor, the system blocks an IGCT trigger signal in a discharge resistor circuit, cuts off the discharge circuit, and the voltage of the direct current bus is continuously increased; when the direct current bus voltage exceeds the tripping set value of the direct current bus voltage, the system is tripped in a protection mode, and the tripping is accompanied by the phenomenon that the direct current bus discharges to the ground. In order to protect equipment, the temperature of the discharge resistor needs to be controlled in the steel rolling process.
Disclosure of Invention
In order to solve the technical problems, the invention provides a method for preventing the temperature of a discharge resistor of a speed regulating system of a main motor of a wide and thick plate rolling mill from exceeding the standard, optimizes the basic automation system program of the rolling mill, and controls the temperature of the discharge resistor in the steel rolling process, which comprises the following steps:
s1, when the temperature of the direct current bus discharging resistor sent by the main motor speed regulating system exceeds 50 ℃, sending out an early warning signal through a first comparison link;
s2, when the temperature of the direct current bus discharging resistance sent by the main motor speed regulating system exceeds 75 ℃, sending a signal for temporarily prohibiting the steel plate from entering the rolling mill through a second comparison link, namely, increasing the signal for temporarily prohibiting the steel plate from entering the rolling mill in the starting condition of the tapered roller way in odd passes;
and S3, when the temperature of the direct current bus discharge resistance sent by the speed regulating system of the main motor exceeds 75 ℃ in the even pass, sending a signal for temporarily prohibiting the steel plate from entering the rolling mill through a third comparison link, namely, increasing the signal for temporarily prohibiting the steel plate from entering the rolling mill in the even pass in the starting condition of the tapered roller way.
The technical scheme of the invention is further defined as follows:
in the method for preventing the discharge resistance temperature of the speed regulating system of the main motor of the wide and thick plate rolling mill from exceeding the standard, in step S1, after the comparison link sends out the early warning signal, the early warning signal is displayed on the HMI picture of the operation console.
In the method for preventing the discharge resistance temperature of the speed regulating system of the main motor of the wide and thick plate rolling mill from exceeding the standard, in S1, after an early warning signal is sent out in the first comparison link, an audible and visual alarm is provided at the same time.
In the method for preventing the discharge resistance temperature of the speed regulating system of the main motor of the wide and thick plate rolling mill from exceeding the standard, in S2, after the comparison link II sends a signal for temporarily prohibiting the steel plate from entering the rolling mill, the signal for temporarily prohibiting the steel plate from entering the rolling mill in the odd pass is displayed on the HMI picture of the operation console.
In the method for preventing the discharge resistance temperature of the main motor speed regulating system of the wide and thick plate rolling mill from exceeding the standard, in S3, after a signal for temporarily prohibiting the steel plate from entering the rolling mill is sent out in the third comparison link, the signal for temporarily prohibiting the steel plate from entering the rolling mill in the even pass is displayed on an HMI picture of an operation console.
According to the method for preventing the discharge resistance temperature of the main motor speed regulating system of the wide and thick plate rolling mill from exceeding the standard, when the discharge resistance temperature of the direct current bus exceeds 50 ℃, the early warning signal is displayed on the HMI picture of the operating platform, and an acousto-optic alarm is provided; during odd passes, temporarily forbidding the steel plate to enter the rolling mill when the discharge resistance temperature of the direct current bus exceeds 75 ℃, and allowing the steel plate to enter the rolling mill again when the discharge resistance temperature of the direct current bus is lower than 75 ℃; and temporarily forbidding the steel plate to enter the rolling mill when the discharge resistance temperature of the direct current bus exceeds 75 ℃ during even pass, and re-allowing the steel plate to enter the rolling mill when the discharge resistance temperature of the direct current bus is lower than 75 ℃.
The invention has the beneficial effects that: the invention optimizes the basic automation system program of the rolling mill, controls the temperature of the discharge resistor in the steel rolling process, has obvious effect and plays an effective protection role in a high-power AC-DC-AC speed regulation system for the main motor of the wide and thick plate rolling mill.
Drawings
FIG. 1 is a schematic block diagram of the control of discharge resistance temperature in the steel rolling process of the present invention.
Detailed Description
The method for preventing the discharge resistance temperature of the speed regulation system of the main motor of the wide and thick plate rolling mill from exceeding the standard provided by the embodiment is characterized in that as shown in fig. 1, the basic automation system program of the rolling mill is optimized, and the discharge resistance temperature is controlled in the steel rolling process, and the method specifically comprises the following steps:
s1, when the temperature of the direct current bus discharging resistor sent by the main motor speed regulating system exceeds 50 ℃, sending an early warning signal through a comparison link I, displaying the early warning signal on an HMI picture of an operation console, and providing sound and light alarm;
s2, when the temperature of the direct current bus discharge resistance sent by the main motor speed regulating system exceeds 75 ℃, sending a signal for temporarily prohibiting the steel plate from entering the rolling mill through a second comparison link, namely, in the starting condition of the tapered roller way, increasing a signal for temporarily prohibiting the steel plate from entering the rolling mill in odd passes, and simultaneously displaying the signal for temporarily prohibiting the steel plate from entering the rolling mill in odd passes on an HMI picture of an operation console;
s3, when the temperature of the direct current bus discharging resistance sent by the main motor speed regulating system exceeds 75 ℃, sending a signal for temporarily prohibiting the steel plate from entering the rolling mill through a third comparison link, namely, in the starting condition of the tapered roller way, increasing a signal for temporarily prohibiting the steel plate from entering the rolling mill in the even pass, and simultaneously displaying the signal for temporarily prohibiting the steel plate from entering the rolling mill in the even pass on an HMI picture of an operation platform.
When the temperature of the direct current bus discharge resistor exceeds 50 ℃, displaying the early warning signal on an HMI picture of an operation console, and providing sound and light alarm; during odd passes, temporarily forbidding the steel plate to enter the rolling mill when the discharge resistance temperature of the direct current bus exceeds 75 ℃, and allowing the steel plate to enter the rolling mill again when the discharge resistance temperature of the direct current bus is lower than 75 ℃; and temporarily forbidding the steel plate to enter the rolling mill when the discharge resistance temperature of the direct current bus exceeds 75 ℃ during even pass, and re-admitting the steel plate to enter the rolling mill when the discharge resistance temperature of the direct current bus is lower than 75 ℃.
In addition to the above embodiments, the present invention may have other embodiments. All technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the protection scope of the present invention.
Claims (6)
1. A method for preventing the temperature of the discharge resistor of the speed regulating system of the main motor of a wide and thick plate rolling mill from exceeding the standard is characterized in that: optimizing a basic automation system program of the rolling mill, and controlling the temperature of the discharge resistor in the steel rolling process, wherein the basic automation system program comprises the following steps:
s1, when the temperature of the direct current bus discharging resistor sent by the main motor speed regulating system exceeds 50 ℃, sending out an early warning signal through a first comparison link;
s2, when the temperature of the direct current bus discharge resistance sent by the main motor speed regulating system exceeds 75 ℃, sending a signal for temporarily forbidding the steel plate to enter the rolling mill through a second comparison link, namely, increasing a signal for temporarily forbidding the steel plate to enter the rolling mill in the starting condition of the tapered roller way in odd passes;
s3, when the temperature of the direct current bus discharge resistance sent by the main motor speed regulating system exceeds 75 ℃, sending a signal for temporarily forbidding the steel plate to enter the rolling mill through a third comparison link, namely, increasing a signal for temporarily forbidding the steel plate to enter the rolling mill in the starting condition of the tapered roller way in the even pass.
2. The method for preventing the discharge resistance temperature of the speed regulating system of the main motor of the wide and thick plate rolling mill from exceeding the standard according to claim 1, wherein the method comprises the following steps: in S1, after the first comparing link sends out the warning signal, the warning signal is displayed on the HMI picture of the console.
3. The method for preventing the discharge resistance temperature of the speed regulating system of the main motor of the wide and thick plate rolling mill from exceeding the standard according to claim 2, is characterized in that: in the step S1, after the first comparison link sends out the early warning signal, an audible and visual alarm is provided.
4. The method for preventing the discharge resistance temperature of the speed regulating system of the main motor of the wide and thick plate rolling mill from exceeding the standard according to claim 1, wherein the method comprises the following steps: in the step S2, after the second comparison link sends out a signal for temporarily prohibiting the steel plate from entering the rolling mill, the signal for temporarily prohibiting the steel plate from entering the rolling mill in the odd pass is displayed on an HMI picture of an operation platform.
5. The method for preventing the discharge resistance temperature of the speed regulating system of the main motor of the wide and thick plate mill from exceeding the standard according to claim 1, wherein the method comprises the following steps: in the step S3, after the third comparison link sends a signal for temporarily prohibiting the steel plate from entering the rolling mill, the signal for temporarily prohibiting the steel plate from entering the rolling mill for the even pass is displayed on the HMI picture of the operation console.
6. The method for preventing the discharge resistance temperature of the speed regulating system of the main motor of the wide and thick plate mill from exceeding the standard according to claim 1, wherein the method comprises the following steps: when the temperature of the direct current bus discharge resistor exceeds 50 ℃, displaying the early warning signal on an HMI picture of the operation platform, and providing sound and light alarm; when the discharge resistance temperature of the direct current bus is higher than 75 ℃, temporarily forbidding the steel plate to enter the rolling mill, and when the discharge resistance temperature of the direct current bus is lower than 75 ℃, re-allowing the steel plate to enter the rolling mill; and temporarily forbidding the steel plate to enter the rolling mill when the discharge resistance temperature of the direct current bus exceeds 75 ℃ during even pass, and re-allowing the steel plate to enter the rolling mill when the discharge resistance temperature of the direct current bus is lower than 75 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010951323.4A CN112260612B (en) | 2020-09-11 | 2020-09-11 | Method for preventing discharge resistance temperature of main motor speed regulating system of wide and thick plate rolling mill from exceeding standard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010951323.4A CN112260612B (en) | 2020-09-11 | 2020-09-11 | Method for preventing discharge resistance temperature of main motor speed regulating system of wide and thick plate rolling mill from exceeding standard |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112260612A CN112260612A (en) | 2021-01-22 |
| CN112260612B true CN112260612B (en) | 2022-08-19 |
Family
ID=74232057
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010951323.4A Active CN112260612B (en) | 2020-09-11 | 2020-09-11 | Method for preventing discharge resistance temperature of main motor speed regulating system of wide and thick plate rolling mill from exceeding standard |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112260612B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101920270A (en) * | 2009-06-12 | 2010-12-22 | 宝山钢铁股份有限公司 | Device and method for detecting and controlling tilting buckle head of band steel in rough rolling process |
| CN105406698A (en) * | 2015-11-10 | 2016-03-16 | 冶金自动化研究设计院 | Three-level AC-DC-AC frequency converter DC bus overvoltage protection method |
| CN105656297A (en) * | 2016-03-14 | 2016-06-08 | 广东明阳龙源电力电子有限公司 | Discharging method of direct driving type wind turbine generator system converter direct-current bus |
-
2020
- 2020-09-11 CN CN202010951323.4A patent/CN112260612B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101920270A (en) * | 2009-06-12 | 2010-12-22 | 宝山钢铁股份有限公司 | Device and method for detecting and controlling tilting buckle head of band steel in rough rolling process |
| CN105406698A (en) * | 2015-11-10 | 2016-03-16 | 冶金自动化研究设计院 | Three-level AC-DC-AC frequency converter DC bus overvoltage protection method |
| CN105656297A (en) * | 2016-03-14 | 2016-06-08 | 广东明阳龙源电力电子有限公司 | Discharging method of direct driving type wind turbine generator system converter direct-current bus |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112260612A (en) | 2021-01-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110280602B (en) | Intelligent steel rolling abnormal rolling evaluation system and processing method | |
| US20080290666A1 (en) | Generator power plant protection system and method | |
| CN112260612B (en) | Method for preventing discharge resistance temperature of main motor speed regulating system of wide and thick plate rolling mill from exceeding standard | |
| CN107917501A (en) | The method for controlling oil return of direct-current variable | |
| EP2464488B1 (en) | Method for disconnecting a short circuit during short-arc welding and welding device for short-arc welding | |
| US6257034B1 (en) | System and method for preventing scale defects during hot rolling | |
| DE102015014798B4 (en) | Motor drive with consequential damage prevention function | |
| WO2004010522A3 (en) | Method and apparatus for fuel cell protection | |
| CA2365735A1 (en) | Adaptive protection for recloser control | |
| EP1496589A1 (en) | Apparatus and method for protection of an electrical machine | |
| CN113198849B (en) | Control method for automatically reducing set speed after main transmission current of roughing mill exceeds limit | |
| WO2002046499A1 (en) | Method and control unit for operation of aluminum reduction cell | |
| EP3701607A1 (en) | Method and system for determining a hazard potential of an electrical installation | |
| CN109522660B (en) | Detection method for roll breakage of rolling mill in continuous rolling production line, storage medium and computing equipment | |
| CN105903543B (en) | Disintegrating machine alarm protecting apparatus and its control method | |
| CN107727996B (en) | Electrical line connection degradation monitoring method | |
| CN115213231A (en) | Automatic control method capable of accurately predicting roller breakage | |
| RU2764280C1 (en) | Method for protecting a power line from a remote short circuit and informing a network manager about disconnecting a protective switching device | |
| RU2779432C1 (en) | Method for protecting a power line from a remote short circuit | |
| CN105598176B (en) | The flat anti-accumulation automatic alarm shutdown system of vertical Continuous mill train | |
| CN116845887B (en) | Fault processing method and device for single-side auxiliary machine configuration unit | |
| EP0500997A1 (en) | Switchgear influencing device | |
| US20230070162A1 (en) | Method for Monitoring and Controlling a Current Distribution in an Installation | |
| CN115229151A (en) | Method for judging and processing abnormal cooling water of crystallizer of slab continuous casting machine | |
| CN107482615B (en) | Control method for high-energy-carrying enterprise power grid after load loss is taken into consideration |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |