KR100368260B1 - A watching, checking and breakdown-analyzing apparatus for power system in a hot rolling process - Google Patents

Abstract

Power monitoring, inspection and failure analysis apparatus of the power system of the hot rolling process of the present invention is a signal detection unit for detecting a power signal, rolling operation signal and breaker signal, and processing the signal input from the signal detection unit in real time and the signal processing unit A signal processor for storing and storing a database when a warning signal is input, and an information processor for creating and displaying a database defined by a user by processing a code input through a transmission device connected to the signal processor through a code sharing method; And a monitor screen unit for inputting the information processed by the information processing unit through a local area network to display information on monitoring, checking and fault status.

Description

Power monitoring, inspection and breakdown analysis system of hot rolling process {A WATCHING, CHECKING AND BREAKDOWN-ANALYZING APPARATUS FOR POWER SYSTEM IN A HOT ROLLING PROCESS}

The present invention relates to an apparatus for monitoring, checking and failure analysis of a power system in a hot rolling process of a steel mill, and in particular, to monitor and check a state of power supplied to a hot rolling line and energy consumed by a rolling mill. Monitoring and inspection of the power system of the hot rolling process that can immediately provide the first error place when the breaker breaker caused by the circuit breaker spreads to the electric system and provide the worker with necessary actions in case of emergency generator failure. And a failure analysis apparatus.

In general, hot roll fixing in the steel manufacturing process uses a number of control systems for the efficient use of power, energy saving and quality improvement. The power supplied to the hot rolling process is a large main motor for driving the rolling mill, a small auxiliary motor for driving the peripheral equipment, a control system for various auxiliary driving equipment and a heating furnace for the rolling process to which the main power is supplied, rough rolling, finishing rolling, and winding machine. The equipment is operated precisely without malfunction for 24 hours. This power must be supplied with stable power in order to operate the control system and the equipment without malfunction and precisely.

The balance of power consumed by rolling mill by power system, load distribution by material, and quality of supply voltage during the rolling process are the deciding factors for energy saving and quality. Power failure due to various causes such as overload during operation, abnormality of parts and machinery or abnormality of power line due to abnormality of control system during rolling process can cause power failure in the whole system. At this time, the emergency power plant is automatically operated to supply emergency power to the emergency equipment during the process, supplying the cooling water to cool the high heat inside the heating furnace reaching a temperature of about 1000 ~ 1200 ℃, and reducing and rolling the roll of the rolling mill. It is activated.

However, when the emergency power plant is stopped in the event of a power failure, the supply of cooling water is interrupted and the roll does not operate. Each of the mechanical parts of the rolling mill due to high heat is recovered when the material being rolled is stopped for a long time in the rolling mill. Is hardly deformed. Therefore, if the emergency power supply is delayed or the power system takes a long time to find an abnormal part, severe damage occurs to each part of the rolling line.

In order to reduce such damage, in the past, an alarm lamp indication, a power value, and a trans alarm were provided to the printer in the power PLC, and in the rolling operation PLC, an alarm is displayed when the operation value of the rolling mill's operation data is above or below the set value. And a printer. In addition, in the control panel of the circuit breaker, the breaker input and the break status are displayed on the lamp.

These marking methods are presented in separate device-specific places irrespective of each other. Therefore, it is very difficult to analyze the correlation between the power content and the operation data, and when an abnormality occurs, when a circuit breaker occurs almost simultaneously, a number of professional and skilled personnel should be arranged. However, in current automated processes, this measure is very difficult because the number of workers must be minimized. In addition, in order to utilize separately configured devices such as power system, rolling operation system, and shutoff mechanism system as interrelated information, it is possible to monitor, check, and analyze data of power and rolling only by highly experienced experts in the field. .

The power PLC or rolling operation PLC of the system is mostly composed of microprocessors and buses, and these are composed of bus systems that define signals according to the manufacturer according to the control of the unit process according to the application field. These PLCs have a communication channel that allows other systems to access data, but the data access can degrade the performance of the PLC or interfere with the controller's own tasks. In addition, since the speed of data to be acquired is slow, most of them are meaningless as data, and the breaker state display of the breaker control panel is displayed in a separate lamp display portion. The data of the power PLC that generates the data of the power system, the data of the rolling operation PLC that occurs during rolling, and the breaker status of the power system are related to each other, but are processed separately, so there are many cases that have no meaning as data during monitoring, inspection and analysis. In addition, when an abnormality occurs, it is difficult to determine which part is the first failure point when a large number of circuit breakers are blocked due to instantaneous spread to the electric system.

The present invention has been made in view of the above points, and monitors and checks the state of power supplied to the hot rolling line and the energy consumed in the rolling mill, and when the breaker of the breaker due to an abnormality of the power system is spread to the electric system, The purpose is to provide a warning message by providing the place of abnormality immediately, and to provide the monitoring, inspection and failure analysis device of the power system of the hot rolling process that can provide the workers with the necessary measures in case of emergency generator failure.

Another object of the present invention is to monitor the power system of the hot rolling process that can be provided by the signal processing unit and the information processing unit in the code sharing method to provide a faster warning message and measures by the faster signal processing in the event of a power system failure, It is to provide an inspection and failure analysis device.

In order to achieve the above object, the monitoring, inspection and failure analysis apparatus of the power system of the hot rolling process of the present invention is a signal detection unit for detecting a power signal, rolling operation signal and breaker signal, and input from the signal detection unit When the signal is processed in real time and the warning signal is input from the signal processor, the signal processor stores and stores the database, and the code processor is connected to the signal processor through a code sharing method to process a code input through a transmission device. And an information processing unit for creating and displaying a database defined by the data processing unit, and a monitor screen unit for inputting the information processed by the information processing unit through a local area network to display information on monitoring, checking, and fault conditions.

1 is a block diagram showing an apparatus for monitoring, checking and failure analysis of a power system of a hot rolling process according to the present invention.

Figure 2 is a block diagram briefly showing the operation concept of the monitoring, checking and failure analysis apparatus of the power system of the present invention.

3 is a block diagram illustrating a signal detector of FIG. 1.

Figure 4 is a block diagram showing the information processing of the monitoring, inspection and failure analysis apparatus of the power system according to the present invention.

* Description of the symbols for the main parts of the drawings *

10: signal detection unit 20: signal processing unit

30: transmission device 40: information processing unit

41: field monitor 42: screen processing computer

50: monitor screen 111: power PLC

121,221,321: Sampling unit 123,223,323: Real-time data processing unit

124,224,324: Alarm inspection processing unit 129,229,329: Local bus

Hereinafter, with reference to the accompanying drawings will be described in detail with respect to the monitoring, inspection and failure analysis apparatus of the power system of the hot rolling process according to the present invention.

1 is a block diagram showing an apparatus for monitoring, checking and failure analysis of a power system for fixing a hot rolling mill according to the present invention. As shown in the figure, the power system monitoring, inspection and failure analysis device of the present invention is a signal detection unit 10 for detecting a power signal, rolling operation signal and breaker signal, and the signal input from the signal detection unit 10 The signal processing unit 20 for processing the signal, the transmission unit 30 for transmitting the signal processed by the signal processing unit 20, and the signal transmitted through the transmission unit 30 to process the information for monitoring and inspection And an information processing unit 40 for displaying, and a monitor screen unit 50 for displaying information on monitoring, checking, and failure status using a local area network.

The signal detecting unit 10 includes a power PLC 111 for controlling a hot rolling power system, a rolling operation PLC 312 for generating various rolling operation data by driving a rolling mill by receiving electric power, and on / off of a power system breaker. A circuit breaker control panel 213 for displaying a state and a signal collector 215 for directly extracting and processing the signal of the circuit breaker control panel 213.

The operating concept of the monitoring, checking and failure analysis apparatus of the above configuration is shown in FIG. At this time, for simplicity, only one PLC of the signal detection unit 10 is illustrated and described. As shown in the figure, the PLC 11 of the signal sensing unit 10 is composed of a CPU 16 and an input / output card 17, and the CPU 16 and the bus buffer 13 are connected by a PLC bus C4. The input / output buffer 15 is connected to the input / output card 17 to draw out a signal. The output of the PLC 11 is connected to the PC 10 through the insulation card 12, which is to electrically insulate the output of the PLC 11, i.e. to solve the impedance matching problem. Used. Data output from the PLC 11 is acquired in real time by the data acquisition unit 25 of the PC 10.

A detailed description of the signal detection unit 10 is shown in FIG. 3. As shown in the figure, an alarm signal for overcurrent, overvoltage, and undervoltage is input to the power PLC 111 from the F1 to F7 breaker alarms, and voltage signals, current signals, power signals, and reactive power signals are input from the F1 to F7 power sensors. The alarm, medium alarm and short ground signal are input from the trans alarm. The power PLC 111 inputs through an input card 133 for processing an input signal to be suitable for input, an input / output bus 139 for inputting a signal processed by the input card, and an input / output bus 139. CPU 131 for processing a signal, an output card 135 for processing a signal input through the I / O bus 139 so as to be suitable for output, and a CPU 131 mounted on the I / O bus 139 for processing. And a buffer 140 for outputting the signal to the data processing card 128.

In addition, the breaker control panel 213 inputs an on / off signal from the power circuit breaker, and a plurality of built-in switches are turned on / off according to the signal. A signal collector 215 is connected to the breaker control panel 213 to collect and output a signal of the breaker control panel 213. The signal collector 215 includes an input card 233 for processing a signal input from the breaker control panel 213, an input / output bus 239 for inputting a signal of the input card, and a signal input through the input / output bus. A CPU 231 for processing and a connector 238 connected to the input / output bus 239 and outputting a signal processed by the CPU 231 to the data processing card 228.

The rolling operation PLC 312 is an input card 333 for processing device fault signals, supply power fault signals, and temperature signals inputted from the F1 to F7 auxiliary facility alarms, and the input card 333 through the input / output bus 339. A CPU 331 for receiving a signal from the CPU 331, an output card 335 for receiving and processing a signal processed through the input / output bus 339, and a data processing card mounted on the input / output bus 339. And a buffer 340 which outputs to 328.

Referring back to FIG. 1, the signal processor 20 includes three signal processors 120, 220, and 320 connected to the power PLC 111, the rolling operation PLC 312, and the circuit breaker control panel 213 of the signal detector 10, respectively. It is composed. Since each of the signal processing units 120, 220, and 320 has the same configuration, the configuration of the present invention will be described below on behalf of the signal processing unit 120 connected to the power PLC 111. FIG.

The signal processor 120 may include a data acquisition unit 118 for outputting a signal output from the signal detection unit 111, a high speed sampling unit 121 for sampling a signal sensed by the data acquisition unit 118 at high speed; A field bus collecting unit 122 collecting the sampled data, a real time signal processing unit 123 processing the collected data in real time, and a local bus transmitting the signal processed by the real time signal processing unit 123 129, an alarm inspection processing unit 124 for inspecting and processing an alarm of data collected by the field data collection unit 122, and alarm data storing an alarm inspection signal processed by the alarm inspection processing unit 124 The storage unit 125, the heavy alarm signal processing unit 126 in which the heavy alarm among the alarm inspection signals processed by the alarm inspection processing unit 124 are input and processed, and the data processed by the heavy alarm signal processing unit 126 are analyzed. Minutes to save The data storage unit 127 is configured.

The alarm digital signals output from the power PLC 111, the rolling operation PLC 312, and the breaker control panel 213 requiring tracking and analysis of the data are fast sampling units 121, 221, and 321 of the signal processing unit 20 and field data. When the alarm check processing unit (124, 224, 324) is compared with the basic normal value through the collecting unit (122, 222, 322) and is determined to be an alarm, the digital signal is stored in the alarm data storage unit (125, 225, 325) and the high and long digital signal is used for power signal and rolling operation data. The data is processed by the medium alarm signal processing unit 26 to store data for 4 minutes before failure and 1 minute after failure, which are stored 10 times in the analysis data storage unit 27 with the corresponding signal name.

As described above, power and safe driving and breaker signals are detected by the signal detector 10 and processed by the signal processor 20. Real-time data processed by the real-time data processing unit (123, 223, 233) of the signal processing unit 20 is directly output to the field monitor 41 or the monitoring screen 51 of the monitor screen unit 50 through the transmission device 30 of the local area network Real-time monitoring of the data through the fault management guide screen (53). When a high tension occurs in the rolling line, the input data is processed in the medium alarm data processing unit 126, 226, 326, and then stored in the analysis data storage unit 127, 227, 327, followed by the tracking and analysis screen 52 of the monitor screen unit 50. On request, it is read and processed by the screen processing computer 42 of the information processing unit 40 through the transmission device 30, and then displayed on the tracking and analysis screen 52 of the monitor screen unit 50.

Real-time data, alarm signals, power, and rolling operation data read through the transmission device 30 are confirmed in real time by the field monitor 41 of the information processing unit 40. The information processing unit 40 receives the data from the signal processing unit 20 and processes the real time data, the failure tracking and the cause analysis data request from the monitor screen unit 50. The processed data is displayed on several monitor screens at the same time by the monitor screen unit 50.

Although not shown in the drawings, the screen may be displayed on multiple monitors at the same time, or partially, or one screen on one monitor as in a general display method. The screen displayed on the monitor screen unit 50 by the processing of the information processing unit 40 is provided with a screen for each data characteristic configured for each function at the same time, the monitoring and inspection screen 51 in which real-time data is processed, the failure analysis in the event of a failure A tracking and analysis screen 52 in which easy functions are inserted into the screen, and a failure action guide screen 53 which is automatically irradiated upon operation of the emergency generator by a total power failure are prepared in advance. Breaker initial occurrence signal is stored in the alarm data storage unit 25 is presented to the screen.

The signal processor 20, the information processor 40, the signal processor 20, and the monitor screen unit 50 are connected by the transmission device 30 to exchange data. The transmission and reception of such data by the transmission device 30 follows a general data communication method using a local area network. In this case, a PC (Personal Computer) which has a signal processing unit 20 and processes and stores a signal input from the signal detecting unit 10 acts as a server and is located in a field monitor 41 located at each individual line of the line. The field processing computer 42, the monitoring inspection screen 51, the tracking analysis screen 52 and the like act as a client.

Conventionally, transmission and reception of data between such a server and a client is performed by a data communication method. In this data communication method, data of a database built on a server, that is, a database processed and stored by a signal processor is directly transmitted to a client. For example, when real-time data, failure tracking and cause analysis data request are input from the monitor screen unit 50, the information processing unit 40 receives the data directly by the signal processing unit 20. However, this data communication method has a problem that the processing speed is slowed because data is transmitted and received between the server and the client.

Therefore, the present invention uses a code sharing method in which code is transmitted and received between the server and the client. For example, when real-time data or trouble tracking and cause analysis data request is input from the monitor screen unit 50, the information processing unit 40 receives a code from the signal processing unit 20 and directly inputs the code into the information processing unit 40. By processing at, the information processing speed can be greatly improved.

4 is a functional block diagram illustrating signal processing in the signal processing unit 20.

The power signal, the rolling operation signal, and the breaker signal detected by the signal detection unit 10 are acquired by the data acquisition units 118, 128, and 318 of the signal processing unit 20 (A1), and are sampled by the sampling units 121, 221, and 321, respectively, to analog and digital signals. Memory-based (A2, A3). At this time, the analog database is a UDM (Usual Data Memory) database and the digital database is a CDM (COS Data Memory) database, all of which are managed by time.

The data acquired by the data acquisition units 118, 128, and 318 are processed by the real-time data processing units 123, 223, and 323, and stored as TDF (TAG Definition Form) analog data and TDF digital data (A4, A5). In addition, the acquired data is processed by the alarm inspection processing unit 124, 224, 324 to generate an alarm and at the same time, each alarm mode and state change are stored in the alarm data storage unit 125, 225, 325 (A6, A7, A8).

On the other hand, the analog data and digital data of the UDM database and the CDM database are processed online (A9), and then the time-controlled UDF database and the event management IDF database (A11, A12). In the UDF database and the IDF database, fields of data and the like are arbitrarily defined by a user who uses the system as a disk base. Therefore, it is converted into user-defined data in the disk base defined in the database of the memory base. This means that the data processing according to the present invention is done in a code sharing manner. That is, the database of the memory base of the server is recreated into the database of the disk base of the client, and the code data processed by the real-time data processing units 123, 223, 233 and the alarm inspection processing units 124, 224, 324 are actual data defined by the user in the disk base. Is treated as.

The processed data is output to the information processing unit 40 and the monitor screen unit 50 through the MMI interface. Therefore, it is possible to determine the abnormality of the power PLC, the rolling operation PLC, and the breaker control panel of the line through the monitor installed at each point of the hot rolling line.

As described above, since the power signal, the rolling operation signal, and the breaker signal are input to the signal processing unit and processed, the power signal, the rolling operation signal, and the breaker signal are stored in a database, and the data of the database is connected to the information processing unit and the monitor screen unit in a code sharing manner. If an abnormality occurs in the power system of the process, quick warning and failure analysis are possible.

As described above, the present invention monitors and checks the state of the power supplied to the hot rolling line and the energy consumed in the rolling mill to immediately detect the first occurrence of an abnormal place when the breaker of the breaker caused by the abnormality of the power system spreads to the entire system. By identifying and providing warning messages through on-site monitors installed in the field and providing necessary measures to the workers, it is easy to fix the abnormality of the power system. In addition, the present invention, because the PC and the information processing unit and the PC and the monitor screen unit is connected in a code sharing method, it is possible to take a more rapid action in the event of a power system failure.

Claims (4)

A signal detecting unit detecting a power signal, a rolling operation signal, and a breaker signal; A signal processor for processing a signal input from the signal detector in real time and storing and storing a database when a warning signal is input from the signal processor; An information processing unit connected to the signal processing unit in a code sharing manner to process a code input through a transmission device to create and display a database defined by a user; And An apparatus for monitoring, checking and failure analysis of a power system of a hot rolling process, comprising a monitor screen unit for inputting information processed by the information processing unit through a local area network to monitor, check, and display information on a failure state. 2. The apparatus of claim 1, wherein the database of the signal processing unit includes a time management analog database and a time management digital database. The apparatus of claim 1, wherein the database of the information processing unit comprises a time management database and an event management database. The method of claim 1, wherein the signal processing unit, A data acquisition unit for acquiring a signal output from the signal detection unit; A sampling unit for sampling the acquired data; A real time signal processor configured to process the sampled data in real time; An alarm inspection processor configured to inspect and process an alarm of input data; A heavy alarm signal processor configured to process a heavy alarm of the processed alarm test signal; And An apparatus for monitoring, checking and failure analysis of a power system of a hot rolling process, characterized by comprising an analysis data storage unit for analyzing and storing a signal processed by the heavy alarm signal processor.