CN203838528U - Digital electro-hydraulic regulator for steam turbine - Google Patents
Digital electro-hydraulic regulator for steam turbine Download PDFInfo
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- CN203838528U CN203838528U CN201320666610.6U CN201320666610U CN203838528U CN 203838528 U CN203838528 U CN 203838528U CN 201320666610 U CN201320666610 U CN 201320666610U CN 203838528 U CN203838528 U CN 203838528U
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- 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
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
Abstract
The utility model provides a digital electro-hydraulic regulator for a steam turbine, and the regulator comprises a power supply, a PLC system, a data collection module, a signal isolation module, a relay module, a servo control module, an OPC overspeed protection module, and a man-machine interface module, wherein the data collection module, the signal isolation module, the relay module, the servo control module, the OPC overspeed protection module and the man-machine interface module are respectively in signal connection with the PLC system. The PLC system communicates with the man-machine interface module and a remote work station. The PLC system carries out data exchange with the OPC overspeed protection module through an I/O port of the PLC system. An I/O module is directly connected with the signal isolation module, the servo control module and the relay module, and collects an external signal state in real time. The OPC overspeed protection module collects three rotating-speed signals, and achieves the two-out-of-three overspeed protection. The PLC system reads three rotating speeds of the OPC overspeed protection module in real time, participates the calculation of PID, and outputs a corresponding drive current to an on-site hydraulic actuator according to an instruction object of an operator. The regulator is simple in configuration, is high in universality, is practical and convenient, and can be widely used for occasions of industrial control application.
Description
Technical field
The utility model relates to steam turbine technology field, in particular to a kind of steam turbine digital electrohydraulic regulator.
Background technology
Regulator is mainly used in various condensings, back pressure, filling, singly takes out, takes out independent regulation or the thermoelectricity decoupling zero adjusting of back of the body power generation and heat supply generating unit speed, power, extraction pressure, exhaust steam pressure, also can be used for the pure speed regulating control of all kinds of Driving Fan water pumps (fan pressure, discharge of pump), drags steam turbine industry tandem control (compressor air pressure, boiler water level, other pull-over gear load etc.).
The nonredundancy formula steam turbine electrohydraulic controller of the domestic use of China, mostly is woodward company of U.S. product, and this Product Man-Machine Interface is full English display, and price is high, Operation and Maintenance maintenance is inconvenient.Domestic like product, although carried out design improvement according to imported product, most of product function is comprehensive not, such as there being man-machine interface, but there is no remote work station; Some has workstation, but there is no man-machine interface, and function can meet some specific control occasions, classifies more, can not realize general.
Utility model content
The utility model object is to provide the technical grade steam turbine digital electrohydraulic regulator using under a kind of various operating modes at the scene, meet the control of electric turbine group rotating speed, power control, involve control for heat control, thermoelectricity, drag generating unit speed control, the control of tandem parameter, the occasions such as lonely network operation control.
For reaching above-mentioned purpose, the utility model proposes a kind of steam turbine digital electrohydraulic regulator, comprise power supply, PLC system and the data acquisition module being connected with PLC system signal, signal isolation module, relay module, servocontrol module, OPC purpose overspeed protective module and human-computer interface module, wherein: PLC system and aforementioned human-computer interface module and a remote work station communication, realize exchanges data; PLC system is carried out exchanges data by its I/O interface and OPC purpose overspeed protective module, and I/O module is directly connected with relay module with signal isolation module, servocontrol module, Real-time Collection external signal state; OPC purpose overspeed protective module comprises 3 rotating speed capture cards and 1 voting card; gather three road tach signals simultaneously; realize three and get two overspeed protection; aforementioned PLC system reads OPC purpose overspeed protective module San road tachometer value in real time; participate in PID computing and carry out work according to operator's order target, exporting corresponding drive current to on-the-spot hydraulic actuator.
Further, aforementioned servocontrol module adopts the high form slection formula of two-way LVDT position feedback, according to the instruction of PLC aims of systems, completes PID and calculates output control signal.
Further; aforementioned OPC purpose overspeed protective module comprises 3 rotating speed capture cards and 1 voting card, and every rotating speed capture card is responsible for rotating speed collection and 8051 single-chip microcomputer by a CPLD chip and is responsible for changing the tach signal that CPLD gathers and realizes and PLC system communication function.
Further; aforementioned power source, PLC system CPU and the data acquisition module being connected with cpu signal, signal isolation module, relay module, servocontrol module and OPC purpose overspeed protective module are all fixed in a bus backplane; human-computer interface module is fixed on a display panel, and this display panel is fixed by screws on cabinet.
From above the technical solution of the utility model, digital governer of the present utility model can use under various operating modes at the scene, meet the control of electric turbine group rotating speed, power control, involve control for heat control, thermoelectricity, drag generating unit speed control, the control of tandem parameter, the occasions such as lonely network operation control, stable performance, highly versatile.
Brief description of the drawings
The cabinet outside drawing of Fig. 1 digital governer of the present utility model
Fig. 2 is the cabinet back figure of digital governer.
Fig. 3 is the inside general assembly drawing of digital governer.
Fig. 4 is the systematic schematic diagram of digital governer.
Fig. 5 is servo drive circuit theory diagram in digital governer.
Fig. 6 is OPC overspeed protection schematic block circuit diagram in digital governer.
Fig. 7 is the main program flow chart of digital governer.
Embodiment
In order more to understand technology contents of the present utility model, especially exemplified by specific embodiment and coordinate appended graphic being described as follows.
As shown in Fig. 1-7, according to preferred embodiment of the present utility model, steam turbine digital electrohydraulic regulator comprises power supply, PLC system and the data acquisition module being connected with PLC system signal, signal isolation module, relay module, servocontrol module, OPC purpose overspeed protective module and human-computer interface module, wherein: PLC system and aforementioned human-computer interface module and remote work station communication, realize exchanges data; PLC system is carried out exchanges data by its I/O interface and OPC purpose overspeed protective module, and I/O module is directly connected with relay module with signal isolation module, servocontrol module, Real-time Collection external signal state; OPC purpose overspeed protective module comprises 3 rotating speed capture cards and 1 voting card, gathers three road tach signals simultaneously, realizes three and gets two overspeed protection, and aforementioned PLC system reads OPC purpose overspeed protective module San road tachometer value in real time, participates in PID computing.
Shown in figure 1-3; power supply, PLC system CPU in cabinet and data acquisition module, signal isolation module, relay module, servocontrol module and the OPC purpose overspeed protective module being connected with PLC system CPU signal are all fixed in bus backplane; human-computer interface module is fixed on a display panel; this display panel is fixed by screws on cabinet, and whole cabinet can be fixed in the rack of working site by embedded panel mounting means.Wherein, PLC system CPU, I/O module, power supply, temperature acquisition cartoon are crossed guide rail and are fixed in bus backplane, and their power supply, signal are all connected to bus backplane; Signal isolation module, relay module, servocontrol module, OPC purpose overspeed protective module are all fixed and are connected in bus backplane by connector and support with card format, all I/O signal of regulator all the connection terminal by bus backplane to external connection.Bus backplane is responsible for all power paths, signal path, communication channel, stuck-module circuit, link terminal.
Remote work station can optionally be disposed at Central Control Room or other occasion, human-computer interface module and remote work station all can carry out communication with PLC system, show the operating all parameters of current device, comprise servomotor stroke, rotating speed, power, temperature, main vapour pressure, extraction pressure, filling pressure, exhaust steam pressure, vacuum tightness, oil switch state, main inlet throttle-stop valve state, valve state draws gas, reverse checkvalve state, security personnel's oil pressure state, ETS state, actuator failure state, the on-the-spot lock state of hanging, oil filter state etc., and provide the operation interface of several working ways, parameter configuration, test, protection etc., operator is by the configuration to human-computer interaction interface, operation, realize the control to regulator.Control field apparatus is moved, gathers, calculates, exported to PLC system in steam turbine digital electrohydraulic regulator according to internal processes and operator's configuration operation, completes the operating conditions to industrial steam turbine.
In the present embodiment, upper strata link, man-machine interface display panel (for example touch-screen) and remote work station and PLC system communication, realize exchanges data; Lower floor's link, PLC system is carried out exchanges data by its I/O interface and OPC purpose overspeed protective module, I/O module is directly connected with relay module with signal isolation module, servocontrol module, and corresponding analog quantity and on-off state, appear in Real-time Collection external signal state; OPC purpose overspeed protective module gathers three road rotating speeds simultaneously, realizes three and gets two overspeed protections, and in regulator, PLC reads OPC purpose overspeed protective module San road tachometer value in real time, participates in PID computing.
Signal isolation module adopts electromagnetic isolation pattern, the analog quantity of Isolation input output, play anti-interference, simulating signal is changed, isolate, increase the effect of external driving force, in the external output port of regulator analog quantity, there are 2 special output ports that drive on-the-spot electric liquid conversion actuator, can directly drive all kinds of Voith valves and CPC valve.
Shown in figure 5, servocontrol module, adopt the high form slection formula of two-way LVDT position feedback, according to the instruction of PLC aims of systems, by receiving the target valve instruction of PLC system output and 2 road position signalling feedbacks of hydraulic actuating mechanism, calculate output drive signal through inner PID, drive signal from-160mA is adjustable to 160mA, for driving all kinds of DDV hydraulic efficiency servo-valves.
Shown in figure 6; in the present embodiment; OPC purpose overspeed protective module comprises 3 rotating speed capture cards and 1 voting card, and every rotating speed capture card is responsible for rotating speed collection and 8051 single-chip microcomputer by a CPLD chip and is responsible for changing the tach signal that CPLD gathers and realizes and PLC system communication function.Every rotating speed capture card has independent current source and logic warning circuit, and voting card is by three rotating speed capture card redundant power supplies, and the overspeed alarming logical signal of being brought by three rotating speed capture cards carries out three and gets two logical combinations and export.Overspeed alarming divides three grades, can carry out configuration according to different use occasions.
OPC purpose overspeed protective module You San road CPLD realizes hardware and gathers three road rotating speeds; accurately reliable; three road circuit independent operatings simultaneously; by single-chip microcomputer 8051 independently carry out rotating speed code conversion and with PLC communication; three tunnel hardware alarms are delivered to respectively communication single-chip microcomputer separately and common three by CPLD internal judgment output and are got two voting pieces; voting piece redundant power supply, the output of hardware overspeed alarming.The rotating speed that PLC gathers by OPC module; entering PID program calculates; carry out work according to operator's order target; export corresponding drive current to on-the-spot hydraulic actuator; reach the state of equipment stable operation, PLC in house software, by rotating ratio pair, arranges software overspeed protection simultaneously; form the alarm and protection of redundancy with the hardware overspeed protection of OPC module, more safe and reliable.PLC in regulator, by communication, collection, calculating, control, output, protection to above-mentioned each hardware circuit, has completed the control protection to target device operation.
Relay module, has realized external isolation and the driving of internal switch amount output signal, can meet the on-the-spot heavy current installation switch that drives.
With reference to accompanying drawing 4, the PLC system CPU in regulator has 3 communication ports, and respectively with human-computer interface module, remote work station, the communication of OPC purpose overspeed protective module, CPU carries out exchanges data and communication by bus and I/O module simultaneously.
Relay module is mainly system digits amount output isolation, increases current-carrying capacity, auxiliary reclay effect, and it,, by PLC digital output module controls, is driven by triode, connects internal switch amount, and externally external unit is controlled in output.
The logical program moving in regulator, under special programmed environment, designs by ladder diagram and graphic language, and its master routine logic flow theory diagram as shown in Figure 7.Initialization after system powers on, operation main circulating program, scans each I/O mouth, starts each interrupt routine, waits for the order of human-computer interface module or remote work station.Now can enter parameter configuration, test interface, status display interface, data base administration interface, main operation interface; wherein in configuration interface, be provided with web-privilege password Web, be convenient to protect the reliable and secure property of important parameter and change containing three grades of authorities (as operator's authority, slip-stick artist's authority, producer's authority).Enter after test function; can need to realize and draw valve test, tightness test of steam stop valve, pitch leak test, friction test, overspeed protection test etc. according to scene; enter after corresponding test, can move by setup program, after off-test, return to main interface.Enter the status window of man-machine interface, can check all I/O ports, the states such as analog input and output, digital quantity input and output, rotating speed code, each communication port, realize on-line monitoring, fault inquiry function.Enter behind data base administration interface, can select to read historical data, historical trend curve, also direct query history alarm failure record, is convenient to the historic state of user's query facility operation.
Complete in each parameter configuration, respectively test errorless, the each state of equipment and meet and start and require after, can enter operation function, start after operation, can realize that automation curve starts and manual raising speed according to configuration.It is according to configuration parameters and current working condition that automation curve starts, and automatically rises to rated speed by configuration curve, comprises during this time warming-up, excessively critical, automatic rotational speed rate switching etc.; Manually raising speed, is to set raising speed condition according to operator, carries out raising speed to rated speed by operator's operation, convenient, flexible, is suitable for the occasion such as equipment operation debug phase, maintenance test and uses.After raising speed completes, according to different working condition requirements, can select to generate electricity by way of merging two or more grid systems, drag, the mode such as tandem parameter control.Generate electricity by way of merging two or more grid systems if selected, enter grid-connected pattern, first ingoing power valve control after grid-connected, after opening large valve, exceed rated power 5% and can drop into power closed loop PID and regulate, require to drop into respectively main vapour pressure control, extraction pressure control, exhaust steam pressure control, thermoelectricity according to other user and involve the modes such as controls (decoupling zero adjustings) and realize that various production is generated electricity, confession heat request.If selection drags, tandem control, regulator is operated in rotating speed state of a control, now can control trailing equipment (as water pump, blower fan) by controlling rotating speed, also can directly monitor and control tandem physical quantity (as the physical quantity of the driven equipment controls such as boiler water level, fan pressure, compressor air pressure), can complete the electronic operating condition that changes steam-operating control.Regulator under running status, the safe shutdown of can shutting down by interface, outside shut down, the various ways such as hypervelocity shutdown, manual shut-down being realized equipment.
In the present embodiment, the human-computer interface module of regulator adopts 10 inches of very color touch-screens, and remote work station adopts commercialization or technical grade computing machine, configures 22 cun of displays, be furnished with the workstation interface of independent research, man-machine interface Chinese display elegant in appearance, complete is easy to operate, configuration is flexible.The edition systems such as workstation software can compatible Windows98,2000, XP, Windows7.The man-machine interactive platform of human-computer interface module and remote work station all contains authority classification, the security of parameters that can protection system.
Operator can complete configuration, the operation to steam turbine digital electrohydraulic regulator by on-the-spot man-machine interface, also can complete the function that man-machine touch-screen is identical by remote work station, and remote work station has database function simultaneously; Remote work station adopts Visual Basic basic language Programming, completes and the interface of computing machine, basic operational functions, telecommunication data exchanging function, database function etc., and realizes communication data exchange with PLC.
The steam turbine digital electrohydraulic regulator that the utility model provides, can be widely used in that turbine speed control, generated output control, the control of heat supply back pressure, extraction pressure control, main steam pressure control, thermoelectricity involve control, the occasions such as exhaust steam pressure decoupling zero control of drawing gas.Steering logic configuration program is downloaded to PLC system by Software for Design, system is by communication acquisition on-site signal executive control program, operator completes the operations such as parameter configuration to regulator, supervision, control by man machine operation interface or remote work station, finally reach the object of controlling steam turbine work.That steam turbine digital electrohydraulic regulator of the present utility model has is powerful, configuration simple, highly versatile, the advantage such as practical and convenient, can be widely used in various condensings, back pressure, filling, singly take out, take out back of the body power generation and heat supply unit, also can be used for the pure speed regulating control of all kinds of Driving Fan water pumps, drag the control of steam turbine industry tandem.
Although the utility model discloses as above with preferred embodiment, so it is not in order to limit the utility model.Under the utility model, in technical field, have and conventionally know the knowledgeable, not departing from spirit and scope of the present utility model, when being used for a variety of modifications and variations.Therefore, protection domain of the present utility model is when being as the criterion depending on claims person of defining.
Claims (3)
1. a steam turbine digital electrohydraulic regulator, it is characterized in that, comprise: power supply, PLC system and the data acquisition module being connected with PLC system signal, signal isolation module, relay module, servocontrol module, OPC purpose overspeed protective module and human-computer interface module, wherein: PLC system and aforementioned human-computer interface module and remote work station communication, realize exchanges data; PLC system is carried out exchanges data by its I/O interface and OPC purpose overspeed protective module, and I/O module is directly connected with relay module with signal isolation module, servocontrol module, Real-time Collection external signal state; OPC purpose overspeed protective module comprises 3 rotating speed capture cards and 1 voting card; gather three road tach signals simultaneously; realize three and get two overspeed protection; aforementioned PLC system reads OPC purpose overspeed protective module San road tachometer value in real time; participate in PID computing, export corresponding drive current to on-the-spot hydraulic actuator.
2. steam turbine digital electrohydraulic regulator according to claim 1; it is characterized in that; aforementioned OPC purpose overspeed protective module comprises 3 rotating speed capture cards and 1 voting card, and every rotating speed capture card is responsible for rotating speed collection and 8051 single-chip microcomputer by a CPLD chip and is responsible for changing the tach signal that CPLD gathers and realizes and PLC system communication function.
3. steam turbine digital electrohydraulic regulator according to claim 1; it is characterized in that; aforementioned power source, PLC system CPU and the data acquisition module being connected with cpu signal, signal isolation module, relay module, servocontrol module and OPC purpose overspeed protective module are all fixed in regulator bus backplane; human-computer interface module is fixed on a display panel, and this display panel is fixed by screws on regulator cabinet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320666610.6U CN203838528U (en) | 2013-10-28 | 2013-10-28 | Digital electro-hydraulic regulator for steam turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320666610.6U CN203838528U (en) | 2013-10-28 | 2013-10-28 | Digital electro-hydraulic regulator for steam turbine |
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| Publication Number | Publication Date |
|---|---|
| CN203838528U true CN203838528U (en) | 2014-09-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320666610.6U Expired - Fee Related CN203838528U (en) | 2013-10-28 | 2013-10-28 | Digital electro-hydraulic regulator for steam turbine |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110009875A (en) * | 2019-01-07 | 2019-07-12 | 上海自动化仪表有限公司 | Modular revolving speed warning device |
| CN112730876A (en) * | 2020-12-22 | 2021-04-30 | 山东华阳众能动力科技有限公司 | Speed measuring system of rotary mechanical equipment |
| CN112832876A (en) * | 2020-12-31 | 2021-05-25 | 威立雅（哈尔滨）热电有限公司 | Method for carrying out isolated network starting operation of steam turbine generator through automatic control system |
-
2013
- 2013-10-28 CN CN201320666610.6U patent/CN203838528U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110009875A (en) * | 2019-01-07 | 2019-07-12 | 上海自动化仪表有限公司 | Modular revolving speed warning device |
| CN112730876A (en) * | 2020-12-22 | 2021-04-30 | 山东华阳众能动力科技有限公司 | Speed measuring system of rotary mechanical equipment |
| CN112832876A (en) * | 2020-12-31 | 2021-05-25 | 威立雅（哈尔滨）热电有限公司 | Method for carrying out isolated network starting operation of steam turbine generator through automatic control system |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140917 Termination date: 20191028 |
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| CF01 | Termination of patent right due to non-payment of annual fee |