CN218332363U - Remote centralized control system of rectification upper computer - Google Patents

Abstract

The utility model discloses a long-range centralized control system of rectification host computer, including remote control host computer, switch board, next equipment. The lower device includes: rectifier transformer, on-load voltage regulator, pure water cooler, DC sensor, isolating knife switch, rectification main cabinet. All the lower devices transmit signals to the control cabinet through communication. The control cabinet processes all signals in a centralized manner, and then transmits all data to the remote control upper computer through Ethernet optical fiber communication. The upper computer performs centralized display, protection and control on all the equipment. The utility model discloses can carry out the cooperative operation and control to multiple relevant equipment integration in a system, the analysis and the management of operation directly perceived, simple, the data of being convenient for. The working energy efficiency of the equipment is maximized, the rectification efficiency is improved, the electric energy is saved, and the user cost is reduced. The working personnel can monitor all the devices in the control room, thereby reducing the number of field operators, improving the working environment of the operators and improving the production efficiency.

Description

Remote centralized control system of rectification upper computer

Technical Field

The utility model relates to a centralized control system, especially to a fairing's long-range centralized control system.

Background

The monitoring technology of industrial processes has undergone a long development stage. The operation of the production equipment is completely dependent on manual operation of each equipment on site at the earliest, and the understanding of the production condition can only be realized by directly observing the operation condition of the site equipment by an operator. With the development of automation technology, production operation and monitoring are gradually concentrated in a control room, the field condition is transmitted to the control room in the form of electric signals by using instruments and relays, and the electric signals are reflected on an instrument panel through an indicator light, a ring, a light word board and a display instrument. The operation is carried out in a manner of switching between a button and a switch, and remote operation is enabled. Today, computer technology, network information technology and industrial software and hardware are continuously developed, a monitoring system consisting of an upper computer and a lower computer appears, the monitoring system can reflect field information more vividly and comprehensively, and operation and maintenance are convenient. The upper computer is of a small HMI, a special industrial personal computer, an industrial PC and the like. The traditional monitoring system operated by buttons, switches and a simulation screen is subject to upgrading and transformation due to the reasons of backward technology, inconvenient operation and the like; the monitoring system composed of the general configuration software as the development platform and the industrial PC as the human-computer interface is in the current trend.

For automatic control of a converter, a technology adopted by many old devices is to transmit the operation state of the field devices into a control room in the form of electric signals and reflect the operation state onto an instrument panel through an indicator light, a ring, a light-character board and a display instrument. The remote operation can be performed by means of buttons and switch switching. Or each device has an independent control system, and the automatic control technology has the defects of single independent control, more operators, slow adjustment time, complicated links, difficult statistics, poor coordination capability and higher error rate. And the work environment of the rectification workshop is severe, and factors such as noise, dust, harmful gas and the like are not suitable for long-time work of personnel.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a long-range centralized control system of rectification host computer. Various related devices can be integrated in one system for cooperative operation and control, and the problems of information loss, poor cooperative control and the like caused by mutual cooperation of the devices are reduced.

The technical solution of the utility model is that: the utility model provides a long-range centralized control system of rectification host computer, includes that remote control host computer, switch board, the next equipment three major parts constitute, and the next equipment includes: the system comprises a rectifier transformer, an on-load voltage regulator, a pure water cooler, a direct current sensor, an isolating knife switch and a main rectifier cabinet; the switch board includes: a control cabinet signal terminal, a PLC, a touch screen and a lower switchboard; the remote control host computer includes: an upper switch and a centralized control upper computer; the on-load voltage regulator is connected with the rectifier transformer;

the main rectifier cabinet is respectively in hardware connection with a rectifier transformer, a pure water cooler, a direct current sensor and an isolating knife switch;

the signal terminal of the control cabinet is respectively in signal interconnection with the rectifier transformer, the on-load voltage regulator, the pure water cooler, the direct current sensor, the isolating knife switch and the main rectifier cabinet;

the control cabinet signal terminal is connected with the control cabinet PLC;

the control cabinet PLC is connected with the lower switchboard;

the lower switch is respectively connected with the control cabinet touch screen and the upper switch;

and the upper switch is connected with the centralized control upper computer.

The rectifier transformer provides alternating current input voltage for the rectifier, the alternating current input voltage is measured by the alternating current incoming line connected to the rectifier through the alternating current copper bar, the rectifier transformer is provided with 1-27 gears, the voltage at the 1 gear is highest, and the voltage at the 27 gears is lowest.

The on-load voltage regulator regulates the voltage of the rectifier transformer by lifting the gear of the rectifier transformer, and gives up-shifting, down-shifting, gear sudden stop and gear display BCD code dry node signals.

The main rectifier cabinet converts alternating current sent by the rectifier transformer into direct current and sends the direct current to a load of an electrolysis production workshop, the magnitude of output current is adjusted by controlling the magnitude of a controllable silicon control angle in the main rectifier cabinet, the adjustable range of the control angle is 0-120 degrees, a controllable silicon device at 0 degree is fully opened, the output current is maximum, a controllable silicon device at 120 degrees is closed, and the output current is 0.

And the disconnecting switch device is connected between the rectifying main cabinet and the load and is used for separating the rectifying device from the load device.

The centralized control upper computer is provided with two workstations, a main station and a slave station which are mutually hot standby.

The centralized control upper computer is connected with the control cabinet, the control cabinet PLC is connected with the lower switch through the Ethernet, the lower switch is connected with the upper switch through the optical fiber, and the upper switch and the centralized control upper computer are connected through the Ethernet; and a Siemens S7TCP communication protocol is used between the centralized control upper computer and the PLC.

The utility model discloses with the data of all equipment automatic gathering, demonstration, operation, record in centralized control host computer, can generate audible and visual alarm suggestion, automatic generation historical record, report form, curve. The integration level is high, the operation is visual and convenient, and the analysis and the management of data are convenient. The number of field operators is reduced, the labor environment of the operators is improved, the production efficiency is improved, and the user cost is reduced. The system is not only suitable for the converter, electrolysis and high-voltage test station system, but also can be used for other systems related to sequence control and process control.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

FIG. 2 is a diagram of a multi-gang hardware connection.

Detailed Description

The utility model provides a long-range centralized control system of rectification host computer, includes that remote control host computer, switch board, the next equipment three major parts constitute, and the next equipment includes: 1.1 of a rectifier transformer, 1.2 of an on-load voltage regulator, 1.3 of a pure water cooler, 1.4 of a direct current sensor, 1.5 of an isolating knife switch and 1.6 of a main rectifier cabinet; the control cabinet 1.7 comprises: a control cabinet signal terminal 1.71, a PLC1.72, a touch screen 1.73 and a lower switchboard 1.74; the remote control host computer includes: an upper switch 1.8 and a centralized control upper computer 1.9; all the lower devices 1.1-1.6 transmit signals into the control cabinet 1.7 through communication, the control cabinet 1.7 performs centralized processing on all the signals, all the data are transmitted to a remote control upper computer through Ethernet optical fiber communication, and the centralized control upper computer performs centralized display, protection and control on all the devices;

the on-load voltage regulator 1.2 is connected with the rectifier transformer 1.1;

the main rectifier cabinet 1.6 is respectively connected with a rectifier transformer 1.1, a pure water cooler 1.3, a direct current sensor 1.4 and an isolating knife switch 1.5 through hardware;

the control cabinet signal terminal 1.71 is respectively in signal interconnection with a rectifier transformer 1.1, a load voltage regulator 1.2, a pure water cooler 1.3, a direct current sensor 1.4, an isolating knife switch 1.5 and a main rectifier cabinet 1.6;

the control cabinet signal terminal 1.71 is connected with the control cabinet PLC 1.72;

the control cabinet PLC1.72 is connected with the lower switchboard 1.74;

the lower switchboard 1.74 is respectively connected with the control cabinet touch screen 1.73 and the upper switchboard 1.8;

and the upper switch 1.8 is connected with a centralized control upper computer 1.9.

The lower devices 1.1-1.6 introduce signals into a control cabinet signal terminal 1.71, the control cabinet signal terminal 1.71 is introduced into a control cabinet PLC1.72, the control cabinet PLC1.72 transmits data to a lower switch 1.74, the touch screen 1.73 reads data from the lower switch 1.74 to realize single-machine display control, the lower switch 1.74 transmits data to an upper switch 1.8, and the centralized control upper computer 1.9 reads data from the upper switch 1.8 to perform centralized display control of multiple devices.

The rectifier transformer 1.1: the alternating current input voltage is provided for the rectifier, and the alternating current input voltage is measured by connecting the alternating current copper bar to the alternating current inlet wire of the rectifier. The transformer voltage level determines the range of rectifier current regulation. The signal is firstly sent to the integer control box to output a dry node signal, then is introduced into a signal terminal 1.71 of the control cabinet, and finally is sent to a PLC1.72 of the control cabinet. The PLC1.72 transmits the signals to the centralized control upper computer 1.9 through Ethernet communication to carry out centralized control.

Its main signals are: the switching state of a rectifier transformer 1.1 high-voltage circuit breaker, the oil temperature display of the rectifier transformer 1.1, the light gas alarm of the whole transformer, the light gas alarm of the modulation, the heavy gas alarm of the whole transformer, the heavy gas alarm of the modulation, the pressure release alarm of the whole transformer, the pressure release alarm of the modulation and the like.

The signals are monitored in real time in an interface of the centralized control upper computer 1.9, if the fault occurs, the centralized control upper computer 1.9 gives out sound and light alarm, a worker needs to check whether the operation of the rectifier transformer 1.1 is normal or not, and if the fault occurs, the abnormal condition needs to be dealt with in time, so that the accident is prevented. The centralized control upper computer 1.9 can display the oil temperature of the transformer in real time, automatically record the oil temperature in a historical database and automatically generate a curve and a report. The signal that centralized control host computer 1.9 received every time can automatic record in historical database, and alarm signal can automatic record in the warning database. Each operation is automatically recorded in the historical database, and an operation record is automatically generated.

The load voltage regulator 1.2: the voltage of the rectifier transformer 1.1 is adjusted through the lifting of the rectifier transformer 1.1. Different gears correspond to different voltages, and the rectifier transformer 1.1 of the system has 1-27 gears, the voltage of the gear 1 is highest, and the voltage of the gear 27 is lowest. The load voltage regulator 1.2 gives out signals of gear up-shifting, gear down-shifting, gear sudden stop, gear display BCD code and equal dry node, and the signals are firstly connected into a signal terminal 1.71 of the control cabinet and finally sent into a PLC1.72 of the control cabinet. And can also be directly accessed into the PLC1.72 through 485 communication. The PLC1.72 transmits the signals to the centralized control upper computer 1.9 through Ethernet communication to carry out centralized control. The centralized control upper computer 1.9 can display the gear of the transformer in real time, automatically record the gear in a historical database and automatically generate a curve and a report. The centralized control upper computer 1.9 can complete the lifting, descending and stopping operations of the 1.1 gear of the rectifier transformer, each operation is automatically recorded in a historical database, and an operation record is automatically generated.

The rectification main cabinet is 1.6: the alternating current sent by the rectifier transformer 1.1 is converted into direct current and sent to a load of an electrolysis production workshop. The magnitude of the output current is adjusted by controlling the magnitude of the controlled angle of the controllable silicon in the rectification main cabinet 1.6, the adjustable range of the controlled angle is 0-120 degrees, the controllable silicon device of 0 degree is fully opened, the output current is maximum, the controllable silicon device of 120 degrees is closed, and the output current is 0.

All signals of the rectification main cabinet 1.6 are firstly connected into the signal terminal 1.71 of the control cabinet and then sent to the PLC1.72 of the control cabinet. The PLC1.72 transmits the signals to the centralized control upper computer 1.9 through Ethernet communication to carry out centralized control.

Its main signals are: one element failure alarm, two element failure trip, bus overheating trip, low water pressure alarm, low water pressure delay blocking pulse, high water temperature alarm and the like.

The signals are monitored in real time in the interface of the centralized control upper computer 1.9, if a fault occurs, the centralized control upper computer 1.9 gives out sound and light alarm, and the alarm signals can be automatically recorded in an alarm database. The staff should check that the operation of rectification main cabinet 1.6 is normal, and the unusual in discovery needs in time to make the processing, prevents to appear the accident. The signal that centralized control host computer 1.9 received every time can automatic record in historical database, and alarm signal can automatic record in the warning database. Each operation is automatically recorded in the historical database, and an operation record is automatically generated.

The 'one-element failure alarm and two-element failure tripping' means that one or more than one quick-melting fuse is arranged on the same rectifying arm. The reason for this is generally due to a severe overload (short circuit) of the output or a large grid surge. The quick fuses on the rectifying bridge arms are quickly and accurately searched and judged through the interface of the centralized control upper computer 1.9, and whether the silicon controlled rectifiers of the corresponding branches are damaged or not is checked. And replacing the damaged fast fuse or the controllable silicon, eliminating the fault of serious overload (short circuit) output, and powering on again to put into operation after no problem exists.

The 'bus overheating' means that more than one silicon controlled rectifier on a bridge arm of the rectifier has the temperature higher than a set temperature (such as 65 ℃), the silicon controlled rectifiers with high temperature are searched from an interface in a centralized control upper computer 1.9, whether a circulating water path is normal or not is checked, whether blockage exists or not is eliminated, and faults are eliminated, so that the temperature of the silicon controlled rectifiers is recovered to be normal. And bus overheating protection, namely, bus temperature protection is 12 circuits which are respectively and independently isolated, an overheating arm can be indicated, a signal is self-maintained, and when the temperature of a bus provided with a rectifying element exceeds 65 ℃, a bus overheating protection and alarm signal is sent to the PLC1.72. When the fault occurs, the PLC1.72 sends a trip signal to trip off the high-voltage circuit breaker and simultaneously block pulse, clear current and protect equipment.

The 'water pressure low alarm' means that the water pressure of a rectifier circulating water system is lower than a set value (such as 0.1 Mpa), whether a water pump works normally or not is checked, whether a water inlet pipeline is blocked or not is checked, and a fault is eliminated, so that the water pressure is recovered to be normal. And (4) water pressure over-low protection, wherein an electric contact pressure gauge monitors normal cooling water pressure, and when the water inlet pressure is lower than 0.1Mpa or water is cut off, a water pressure over-low alarm signal is sent to the PLC1.72.

The water pressure low delay blocking pulse is because temporary insufficient pressure condition can appear in the pure water system operation process, in order to prevent the malfunction, the water pressure low alarm signal will block the pulse, the electric current is clear, the protective equipment after delaying for 10 seconds.

The 'water temperature high alarm' means that the water temperature of a rectifier circulating water system is higher than a set value (such as 45 ℃), and generally, the water temperature is too high and the heat dissipation of circulating water is poor. The heat dissipation of the circulating water should be enhanced to reduce the temperature of the circulating water below the specified inlet temperature. And (4) protection of overhigh water temperature, namely, the temperature of cooling water of an electric contact thermometer is higher than 45 ℃, and when the temperature of a cooling water outlet is higher than 45 ℃, a signal of overhigh water temperature switching value is given to the PLC1.72 and an audible and visual alarm is given. The thermal resistor detects the outlet water temperature of the rectifier cabinet in real time and provides the outlet water temperature of the rectifier cabinet to the PLC1.72 and the centralized control upper computer 1.9.

The pure water cooler is 1.3: the pure water cooler 1.3 is a device for cooling the rectifier by water cooling. The signal is sent to a pure water control box to output a dry node signal, then is introduced into a control cabinet signal terminal 1.71, and finally is accessed into a control cabinet PLC1.72. The PLC1.72 transmits the signals to the centralized control upper computer 1.9 through Ethernet communication to carry out centralized control.

Its main signals are: the method comprises the following steps of starting a water pump 1, starting a water pump 2, stopping the water pump 1, stopping the water pump 2, operating the water pump 1, operating the water pump 2, alarming the overload of the water pump 1, alarming the overload of the water pump 2, alarming the abnormality of water pressure, alarming the abnormality of water temperature, alarming the decline of water level, alarming the small flow, alarming the decline of water quality, alarming the complete stop of the water pump, alarming the water pressure of pure water, the water temperature of the pure water, the conductivity of the pure water and the like.

The signals are monitored in real time in an interface of the centralized control upper computer 1.9, if a fault occurs, the centralized control upper computer 1.9 gives out audible and visual alarm, a worker needs to check whether the pure water cooler operates normally or not, the pure water cooler is damaged, and the pure water cooler can be electrified and put into operation again after the pure water cooler is repaired to be normal. And if the abnormity is found, the abnormity needs to be processed in time, so that accidents are prevented. The centralized control upper computer 1.9 can display the pure water pressure, the pure water temperature and the pure water conductivity in real time, automatically record the water pressure, the pure water temperature and the pure water conductivity in a historical database, and automatically generate a curve and a report. The water pump can be started and stopped, each operation is automatically recorded in the historical database, and the operation record is automatically generated. The signal that centralized control host computer 1.9 received every time can automatic record in historical database, and alarm signal can automatic record in the warning database.

The direct current sensor 1.4: and the equipment for measuring the direct current and the voltage output by the rectification main cabinet 1.6. Measured current and voltage analog quantity signals enter a sensor operation box and are isolated through an optical coupler, alarm signals are output by the sensor operation box to be dry node signals, the dry node signals are led into a signal terminal 1.71 of the control cabinet together, and finally the signals are sent into a PLC1.72 of the control cabinet. The PLC1.72 transmits the Ethernet communication to the centralized control upper computer 1.9 for centralized control.

Its main signals are: direct current overvoltage alarm, direct current overcurrent trip, direct current voltage, direct current and the like.

The signals are monitored in real time in the interface of the centralized control upper computer 1.9, if a fault occurs, the centralized control upper computer 1.9 sends out audible and visual alarm, and a worker needs to check whether the operation of the direct current sensor 1.4 is normal or not, and timely process the abnormal condition to prevent the accident. The centralized control upper computer 1.9 can display direct current voltage and direct current in real time, automatically record the direct current and the direct current in a historical database, and automatically generate curves and reports. The signals received by the centralized control upper computer 1.9 at each time can be automatically recorded in the historical database, and the alarm signals can be automatically recorded in the alarm database. Each operation is automatically recorded in the historical database, and an operation record is automatically generated.

The direct current over-current alarm means that the direct current output current value exceeds a set overload value. The equipment normally runs in a steady-current mode, and the direct-current overload value is generally set to be 1.05 times of rated direct-current output voltage when leaving a factory. If the direct current overload fault is eliminated and the current is reduced, the output current is restored to the original current value, and the direct current overload fault alarm is relieved. If the direct current overload alarm cannot be released for a long time, whether the load is too heavy or not needs to be checked, whether the overload value setting is too low or not needs to be checked, and the operation parameters need to be adjusted again. A current feedback loop fault may also report a "dc overload" fault. And checking whether the feedback loops of the direct current and the direct current transformer are normal or not.

The 'direct current overcurrent trip protection' means that the output current exceeds a set overcurrent protection value. The equipment normally runs in a steady flow mode, and the overcurrent protection value is generally set to be 1.2 times of rated direct current when leaving a factory. When the fault occurs, the PLC1.72 sends a trip signal to trip off the high-voltage circuit breaker and simultaneously block pulse, clear current and protect equipment. The reason for this is generally due to a severe overload (short circuit) of the output or a large grid surge. The current feedback loop fault can also report a direct current overcurrent trip protection fault. The staff should check whether the load is short-circuited, whether the direct current transformer and the feedback loop are normal, whether the power grid condition is normal, whether devices in the equipment are damaged or not, replace damaged fast fuses or thyristor, eliminate the fault of serious overload (short circuit) output, and restart the power supply to operate after no problem exists.

The direct current overvoltage alarm is caused by the fact that the output voltage exceeds a set overvoltage protection value. The equipment normally runs in a steady-flow mode, and the overvoltage protection value is generally set to be 1.1 times of rated direct-current output voltage when leaving a factory. When the DC overvoltage fault occurs, the equipment automatically sends out audible and visual alarm signals. The reasons for this are mainly the voltage feedback loop failure or the large power grid impact and disturbance. And (4) checking whether the voltage transmitter and the power grid are normal or not, and electrifying again to be put into operation after no problem exists.

Disconnecting knife switch 1.5: an isolation knife switch 1.5 device is connected between the rectification main cabinet 1.6 and a production workshop load, and is used for separating or connecting the rectification main cabinet 1.6 and the production workshop load device to play a role of a protection switch, wherein signals are firstly sent into a knife switch control box, then are connected into a control cabinet signal terminal 1.71, and finally are sent into a control cabinet PLC1.72. The PLC1.72 transmits the signals to the centralized control upper computer 1.9 through Ethernet communication to carry out centralized control.

Its main signals are: positive cutter closing display, positive cutter dividing display, negative cutter closing display, negative cutter dividing display, positive cutter closing operation, positive cutter dividing operation, negative cutter closing operation, negative cutter dividing operation, closing position fault alarm and the like.

The signals are monitored in real time in an interface of the centralized control upper computer 1.9, if a fault occurs, the centralized control upper computer 1.9 gives out audible and visual alarm, a worker needs to check whether the operation of the direct current sensor 1.4 is normal or not, and if the fault occurs, the abnormal condition needs to be dealt with in time, so that the accident is prevented. The centralized control upper computer 1.9 can carry out the operation of positive cutter closing operation, positive cutter opening operation, negative cutter closing operation, negative cutter opening operation and remote control. Each operation is automatically recorded in the history database, and an operation record is automatically generated. The signal that centralized control host computer 1.9 received every time can automatic record in historical database, and alarm signal can automatic record in the warning database.

The control cabinet 1.7 comprises a control cabinet signal terminal 1.71, a control cabinet PLC1.72, a control cabinet touch screen 1.73 and a lower switchboard 1.74. Signals of all the lower devices 1.1-1.6 are transmitted into a control cabinet signal terminal 1.71, the control cabinet signal terminal 1.71 is transmitted to a control cabinet PLC1.72, and the control cabinet PLC1.72 finishes device action control, linkage, protection, field signal acquisition, set operation regulation control and the like. The data are sent into an upper switch 1.8 through a lower switch 1.74, the upper switch 1.8 is sent into a centralized control upper computer 1.9, and the centralized control upper computer 1.9 carries out centralized control. The lower switchboard 1.74 sends the lower switchboard 1.73 to carry out single machine control.

The control cabinet 1.7 has the functions of local control-remote control undisturbed switching, pulse blocking, pulse unlocking, emergency stop, current step length setting, inching current rise, inching current fall, direct current setting and the like.

The local control-remote control undisturbed switching function comprises the following steps: when the knob on the panel of the control cabinet 1.7 is switched to the local control, the system can only operate the equipment on the touch screen 1.73 and the door panel of the control cabinet 1.7 on the spot, the centralized control upper computer 1.9 cannot operate, but the operation can be automatically recorded into the historical database and the operation database of the centralized control upper computer 1.9 every time.

When the knob on the panel of the control cabinet 1.7 is switched to remote control, the system can only operate the equipment on the centralized control upper computer 1.9, the touch screen 1.73 and the door panel of the control cabinet 1.7 cannot operate, and the operation of the centralized control upper computer 1.9 every time can be automatically recorded in the historical database and the operation database.

Remote control is performed in the field operation process, and local control is only used during power failure overhaul or debugging.

Pulse blocking: and the control cabinet 1.7 is cut off to cut off the pulse trigger signal emitted to the gate pole of the silicon controlled rectifier of the main cabinet, the silicon controlled rectifier is cut off, and the direct current side current and the direct current side voltage of the main cabinet 1.6 are instantly reset. If an emergency situation exists, the pulse can be directly blocked to enable the current to be cleared to the zero protection device.

Pulse blocking: and (5) recovering the pulse trigger signal emitted by the control cabinet 1.7 to the gate pole of the controllable silicon of the main cabinet, and opening the controllable silicon.

The emergency stop machine presses down an emergency stop button, a control system blocks a trigger pulse, simultaneously gives out a high-voltage tripping signal, cuts off a main loop power supply, gives out sound and light alarm signals, and displays the emergency stop alarm signal on a centralized control upper computer 1.9. The emergency stop accident of the machine needs to be eliminated, and the machine is powered on again after reset.

After the fault happens, the knob of 'fault Jie Yin' on the door plate of the control cabinet 1.7 can be operated to eliminate the alarm sound by sound attenuation. All general fault alarms of the control system can automatically recover normal operation after fault repair. Trip faults require manual intervention to recover.

The signals are monitored in real time in the interface of the centralized control upper computer 1.9, if a fault occurs, the centralized control upper computer 1.9 sends out audible and visual alarms, and a worker needs to check whether the corresponding equipment is normal in operation and timely process the abnormal condition so as to prevent accidents. The centralized control upper computer 1.9 can perform the following steps: the method comprises the following operations of pulse blocking, pulse unlocking, emergency stop, current step length setting, inching current rising, inching current falling, direct current setting, automatic gear upgrading and the like. Each operation is automatically recorded in the historical database, and an operation record is automatically generated. The signals received by the centralized control upper computer 1.9 at each time can be automatically recorded in the historical database, and the alarm signals can be automatically recorded in the alarm database.

The centralized control upper computer 1.9 is provided with two workstations, namely a master station and a slave station which are mutually hot standby. The centralized control upper computer 1.9 is connected with the control cabinet 1.7, the control cabinet PLC1.72 is connected with the lower switch 1.74 through the Ethernet, the lower switch 1.74 is connected with the upper switch 1.8 through the optical fiber, and the upper switch 1.8 is connected with the centralized control upper computer 1.9 through the Ethernet; and a Siemens S7TCP communication protocol is used between the centralized control upper computer 1.9 and the PLC1.72. The centralized control upper computer 1.9 can complete all state display, functions and operations in the lower devices 1.1-1.6, signals in the PLC1.72 are transmitted into the centralized control upper computer 1.9 through Ethernet communication, and the centralized control upper computer 1.9 can automatically gather, display, operate and record, automatically generate sound and light alarm prompts and automatically generate historical records, operation records, reports and curves. All data records were stored for 999 days in cycles.

Automatic gear lifting function: the on-load voltage regulator 1.2 regulates the voltage of the rectifier transformer 1.1 by lifting the gear of the rectifier transformer 1.1. Different gears correspond to different voltages, and the rectifier transformer 1.1 of the system has 1-27 gears, the voltage of the gear 1 is highest, and the voltage of the gear 27 is lowest. The current regulation of the rectifier is realized by controlling the controllable angle of the controllable silicon, the adjustable range of the control angle is 0-120 degrees, the controllable silicon device of 0 degree is fully opened, the output current is maximum, the controllable silicon device of 120 degrees is closed, and the output current is 0.

When the rectifier transformer 1.1 is in the 27 th gear, because of the limitation of the voltage of the gear of the transformer, when the control angle of the rectifier reaches 0 ° in the current increasing process, such as the current 2000, the control angle reaches the maximum value, the rectifier is fully opened for use, the current cannot be increased in this gear, the input voltage of the transformer needs to be increased first to increase the current to 26 th gear, the voltage of the rectifier transformer 1.1 is increased, at this time, the control angle is increased from 0 ° (for example, 15 °), the rectifier reaches the adjustable range, and the current can be increased continuously.

The control angle can not be too large, so that the rectifier is in a deep control state, the harmonic wave is increased, the power factor is low, the utilization rate of the silicon controlled element is low, and the safe operation of equipment is not facilitated. The control angle is preferably controlled between 5 ° and 15 °.

When the angle a is less than 10 degrees, a gear-up request signal is sent out, and when the angle a is less than 5 degrees, the load switch automatically raises the first gear. When the angle a is larger than 10 degrees, a downshift request signal is sent out, and when the angle a is larger than 15 degrees, the load switch automatically lowers the first gear.

Many operators in the field without professional knowledge of the rectifier equipment often cause the control angle of the rectifier to be too large and in a deep control state. Or the control angle has reached 0 deg. but the current has not risen. The automatic up-down shifting can automatically control the control angle in the optimal upper and lower limit range, is beneficial to improving the operation power factor, reducing harmonic waves and improving the utilization rate of elements, and is beneficial to the safe operation of equipment.

The lifting of the gears also has a manual mode, and the gears are used during maintenance and debugging.

Return to zero protection function: when the high-voltage switch trips due to faults, the pulse is automatically blocked, and a given signal automatically returns to zero; when the high-voltage switch is switched on again, the output current starts from 0, and no impact current is generated.

The current automatic lifting function: setting the numerical value of the lifting current, and then setting the time required by the lifting current: the system can automatically set within 1-120 seconds and automatically lift current. The set current value can be automatically lifted in set time according to the process requirements.

Current manual setting function: a user firstly sets the step length of given current in the centralized control upper computer 1.9, such as 100A, then clicks the current increasing button, the current increases by 100A each time, clicks the current decreasing button, and the current decreases by 100A each time.

A system lifting function: the current can be lifted and lowered simultaneously for a plurality of rectifier units. The total step up is set (say 100A), and by clicking the total current up button, each unit of the system will increase the current by 100A at the same time. Clicking the total current drop button, each unit of the system will simultaneously reduce the current by 100A.

The automatic machine set throwing and withdrawing function: and (4) running a plurality of sets simultaneously, exiting one set, and keeping the total current unchanged. The current exiting the unit is automatically distributed to other units on average.

And the user login authority function is used for obtaining corresponding operation only by logging in a corresponding user.

The data monitoring function is as follows: the centralized control upper computer 1.9 can monitor all signals of the lower devices 1.1-1.6 in real time, display the signals in the picture of the centralized control upper computer 1.9 and update the picture in real time. The minimum update frequency is 55ms.

The operation inquiry recording function: each operation is automatically recorded in the operation history database. Such as user login, current up and down, pump start and stop, etc. The storage time is 999 days

The real-time alarm function: when an alarm is sent out, the system pops up a real-time alarm window on all windows at the first time, displays a fault signal and sends out an audio alarm to remind an operator to remove the fault in time. Only after the manual confirmation of the operator, the alarm sound and the picture can be eliminated.

A history alarm function: all fault alarms are automatically recorded in a historical alarm library for later inquiry, and the alarm data storage time is 999 days.

Advanced parameter setting function: only an operator logging in high-level authority can enter 'parameter setting' and 'controller setting' to set key parameters.

And a report inquiry function. When an operator needs to inquire the historical data to judge the field condition, the historical data can be browsed through the inquiry function provided by the program, and a plurality of conditions are provided in the inquiry interface to be matched for inquiry, so that the records required by the operator can be conveniently and accurately found. The report can inquire all operation records, alarm records and user login records. The system automatically generates daily production reports and directly prints the reports. The storage time of the report data is 999 days.

The trend curve function: the centralized control upper computer 1.9 can display the data through a real-time curve and a historical curve: current, voltage, oil temperature, water pressure, etc. The program uses a line graph to display the historical data of current and voltage on the line graph. The situation development trend of the analog quantity is represented by the broken line, so that an intuitive display is provided for an operator.

The remote control system has a good human-computer interaction interface, high integration level and intuitive and convenient operation, reduces the number of field operators, improves the labor environment of operators, improves the production efficiency, realizes factory networking and informatization, and has high automation degree. The operating energy efficiency of the device is maximized. The rectification efficiency is improved, the electric energy is saved, and the user cost is reduced. The system is simple and convenient to construct, has strong functions, is not only suitable for a converter, an electrolysis and high-voltage test station system, but also can be used for other systems related to sequence control and process control, and has better popularization and application prospects.

The system can be operated by a single unit or multiple units, the hardware connection is as shown in figure 2, the lower-level equipment 1.1-1.6 (the same as the lower-level equipment of the single unit in figure 1) of each unit transmits data to the control cabinet 1.7 (the same as the control cabinet 1.7 of the single unit in figure 1), the control cabinet 1.7 of each unit transmits data to the upper switch 1.8, and the centralized control upper computer 1.9 reads the data of the upper switch 1.8 to perform centralized display control on the multiple units and the multiple equipment. The system has modular design, flexible configuration and convenient maintenance. The whole system is connected through a network, and the units can be increased and decreased randomly according to requirements. The hardware devices used by the system are consistent, and the interchangeability is high.

Claims (7)

1. The utility model provides a long-range centralized control system of rectification host computer, includes three major parts of remote control host computer, switch board (1.7), subordinate's equipment, its characterized in that: the lower equipment includes: the device comprises a rectifier transformer (1.1), a load voltage regulator (1.2), a pure water cooler (1.3), a direct current sensor (1.4), an isolating knife switch (1.5) and a main rectifier cabinet (1.6); the control cabinet (1.7) comprises: a control cabinet signal terminal (1.71), a PLC (1.72), a touch screen (1.73) and a lower exchange (1.74); the remote control host computer includes: an upper switch (1.8) and a centralized control upper computer (1.9);

the on-load voltage regulator (1.2) is connected with the rectifier transformer (1.1);

the rectification main cabinet (1.6) is respectively in hardware connection with a rectifier transformer (1.1), a pure water cooler (1.3), a direct current sensor (1.4) and an isolating knife switch (1.5);

the control cabinet signal terminal (1.71) is respectively in signal interconnection with the rectifier transformer (1.1), the on-load voltage regulator (1.2), the pure water cooler (1.3), the direct current sensor (1.4), the isolating knife switch (1.5) and the main rectifier cabinet (1.6);

the control cabinet signal terminal (1.71) is connected with the control cabinet PLC (1.72);

the control cabinet PLC (1.72) is connected with the lower-level switch (1.74);

the lower switchboard (1.74) is respectively connected with the control cabinet touch screen (1.73) and the upper switchboard (1.8);

the upper switch (1.8) is connected with the centralized control upper computer (1.9).

2. The remote centralized control system for the rectification upper computer according to claim 1, characterized in that: the rectifier transformer (1.1) provides alternating current input voltage for the rectifier, the alternating current input voltage is measured by the alternating current incoming line connected to the rectifier through the alternating current copper bar, the rectifier transformer (1.1) is provided with 1-27 gears, the voltage of the 1 gear is highest, and the voltage of the 27 gears is lowest.

3. The remote centralized control system for the rectification upper computer according to claim 1, characterized in that: the on-load voltage regulator (1.2) regulates the voltage of the rectifier transformer (1.1) by lifting the gear of the rectifier transformer, and the on-load voltage regulator (1.2) gives out signals of gear-up, gear-down, gear-sudden stop and gear-display BCD code dry node.

4. The remote centralized control system for the rectification upper computer according to claim 1, characterized in that: the main rectifier cabinet (1.6) converts alternating current sent by the rectifier transformer (1.1) into direct current and sends the direct current to a load of an electrolysis production workshop, the magnitude of output current is adjusted by controlling the magnitude of a controllable silicon control angle in the main rectifier cabinet (1.6), the adjustable range of the control angle is 0-120 degrees, a controllable silicon device of 0 degree is fully opened, the output current is maximum, the controllable silicon device of 120 degrees is closed, and the output current is 0.

5. The remote centralized control system for the upper rectifying computer according to claim 1, characterized in that: and an isolation knife switch (1.5) device is connected between the rectification main cabinet (1.6) and the load and is used for separating the rectification device from the load device.

6. The remote centralized control system for the upper rectifying computer according to claim 1, characterized in that: the centralized control upper computer (1.9) is provided with two workstations, one master station and one slave station which are mutually hot standby.

7. The remote centralized control system for the rectification upper computer according to claim 1, characterized in that: the centralized control upper computer (1.9) is connected with the control cabinet (1.7), the control cabinet PLC (1.72) is connected with the lower level switch (1.74) through the Ethernet, the lower level switch (1.74) is connected with the upper level switch (1.8) through the optical fiber, and the upper level switch (1.8) is connected with the centralized control upper computer (1.9) through the Ethernet; and a Siemens S7TCP communication protocol is used between the centralized control upper computer (1.9) and the PLC (1.72).

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