CN113027782B - External-hanging power station water supply system characteristic test device - Google Patents
External-hanging power station water supply system characteristic test device Download PDFInfo
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- CN113027782B CN113027782B CN202110235646.8A CN202110235646A CN113027782B CN 113027782 B CN113027782 B CN 113027782B CN 202110235646 A CN202110235646 A CN 202110235646A CN 113027782 B CN113027782 B CN 113027782B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/0088—Testing machines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
- F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/0005—Control, e.g. regulation, of pumps, pumping installations or systems by using valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/0077—Safety measures
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
- G06F30/28—Design optimisation, verification or simulation using fluid dynamics, e.g. using Navier-Stokes equations or computational fluid dynamics [CFD]
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2113/00—Details relating to the application field
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
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Abstract
The invention discloses an externally-hung type power station water supply system characteristic test device, which relates to the technical field of supercritical thermal generator sets and comprises a DCS (distributed control system), an externally-hung type machine and an upper computer, wherein the externally-hung type machine comprises a signal input module, a controller module, a signal output module and a network module; the signal input module is used for acquiring data signals in the DCS; the controller module comprises a simulation mode and an actual test mode which can be switched with each other; the controller module is internally provided with a preset model, and can judge optimal test data according to the result of simulation calculation to generate an instruction signal; the signal output module is used for outputting a command signal to the DCS; the network module is used for realizing interaction between the controller module and the upper computer; and the upper computer is used for calling a preset model in the controller module to carry out simulation calculation of the water supply system characteristic test on the acquired data signals.
Description
Technical Field
The invention relates to the technical field of supercritical thermal generator sets, in particular to an externally-mounted power station water supply system characteristic test device.
Background
A conventional 350MW thermal power generating unit water supply system is generally configured with 1 50% capacity electric feed pump and one 100% capacity steam feed pump. An electric feed pump (hereinafter referred to as an "electric pump") is generally used as a unit starting feed pump or a standby feed pump, and a steam feed pump (hereinafter referred to as a "steam pump") is used as a main water pump in the normal operation and load-carrying to full load stage of the unit. In a complete process, an electric pump or a steam pump is connected with feed water from the bottom of a deaerator water tank, passes through an electric pump preposed pump and the electric pump (or a steam-driven preposed pump and the steam pump), sequentially passes through each row of high-pressure heaters, and finally enters a boiler economizer; and meanwhile, a main pipe at the outlet of the water pump provides desuperheater water for the superheater and the reheater. The electric water feeding pump set is driven directly by one end of the motor and driven in variable speed via the motor and the hydraulic coupler. The main pump of the steam feed water pump is coaxially arranged with the preposed pump thereof and is respectively arranged at two sides of the small steam turbine, the main pump is directly driven by the small steam turbine, and the preposed pump is driven by the small steam turbine through the gear box. The steam pump and the electric pump respectively lead out a recirculation pipeline at the outlet of the pump, and the recirculation pipeline returns to the deaerator to ensure the minimum flow of the electric pump or the steam pump in the starting stage.
For a set with a small electric pump capacity (Qe less than or equal to 30 percent and Qe is rated flow), once a steam pump is tripped due to failure in the operation process, a low boiler feed water flow rate and a boiler MFT (Main Fuel Trip) are triggered, and then a steam turbine is tripped in an interlocking manner. For a unit with larger electric pump capacity (more than or equal to 50 percent Qe), when the steam pump trips in operation, the standby electric pump can be quickly started by adopting corresponding technical means, and the unit is controlled to continuously operate within an allowable parameter range without stopping the furnace. Generally, each power plant builds a logic unit in a Distributed Control System (DCS) of a unit according to different parameters such as the capacity of an electric pump, the operation characteristics of the electric pump, the arrangement of measuring points of a water supply System, the operation load and the like, and realizes the functions of tripping the electric pump and starting the electric pump together, rapidly reducing the load of the unit without stopping the unit and the like.
For power plants with different unit capacity changes, different unit measuring point arrangements, different electric pump capacity design sizes, different average running load rates and the like, the electric pump is started after the water supply system fault is directly referenced or copied, and when the logic that the unit quickly reduces the load without stopping the power supply is realized, a lot of uncertain factors can exist, and even the risk of accident expansion caused by mismatching of parameters occurs.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide an external-hanging type power station water supply system characteristic test device which can realize two functions of simulation test and actual test of the characteristics of water supply systems of different power stations.
In order to achieve the purpose, the invention adopts the technical scheme that: a test device for the characteristics of an externally-hung power station water supply system comprises a DCS (distributed control system), an externally-hung machine and an upper computer, wherein the externally-hung machine comprises a signal input module, a controller module, a signal output module and a network module; the signal input module is used for acquiring data signals in the DCS; the controller module comprises a simulation mode and an actual test mode which can be switched with each other; the controller module is internally provided with a preset model, and can judge optimal test data according to the result of simulation calculation to generate an instruction signal; the signal output module is used for outputting a command signal to the DCS; the network module is used for realizing interaction between the controller module and the upper computer; and the upper computer is used for calling a preset model in the controller module to carry out simulation calculation of the water supply system characteristic test on the acquired data signals.
On the basis of the technical scheme, the upper computer can modify the parameters of the preset model in the controller module and display the data in real time.
On the basis of the above technical solution, the determination conditions of the result of the simulation calculation include: a. whether the unit RB can be quickly reduced to the range of the design of the capacity of the electric pump or not at the moment after the steam pump is tripped; b. whether the opening degree of the scoop tube can be added to a normal value of the water supply flow within a specified time after the electric pump is started; c. whether the outlet pressure can quickly meet the requirement of the water supply flow after the electric pump is started; d. whether the water level of the deaerator fluctuates within a normal range.
On the basis of the technical scheme, the signal input module is a Modbus module, and the Modbus module is communicated with the DCS through a Modbus interface; the data signals collected in the DCS comprise analog quantity signals, switching quantity signals and rotating speed signals.
On the basis of the technical scheme, the data signals acquired by the signal input module in the DCS comprise a water supply flow low analog quantity signal, an electric pump outlet pressure analog quantity signal, a steam pump outlet pressure analog quantity signal, an electric pump recirculation regulating valve analog quantity signal, a steam pump recirculation regulating valve analog quantity signal, an electric pump inlet filter screen differential pressure analog quantity signal, a steam pump inlet filter screen differential pressure analog quantity signal, a deaerator liquid level analog quantity signal, a unit load analog quantity signal, an electric pump rotating speed signal, a steam pump rotating speed signal, an electric pump scoop tube opening analog quantity signal, an electric pump outlet electric valve opening feedback signal, a steam pump outlet electric valve opening feedback signal and a water supply pump outlet main tube pressure analog quantity signal.
On the basis of the technical scheme, the instruction signal output by the signal output module comprises a valve instruction for controlling the recirculation valve and a start-stop instruction for controlling the electric pump.
On the basis of the technical scheme, the off-hook machine further comprises an auxiliary module, wherein the auxiliary module comprises a power supply conversion module and a data storage module; the power supply conversion module is used for converting the input 220V alternating voltage into direct current 24V and outputting the direct current 24V as an AO channel power supply; the data storage module is used for storing the related data of the controller module.
On the basis of the technical scheme, a controller module, a signal input module, a power conversion module, a power indicator lamp, a data storage module, an analog output channel, a switching value output channel, a network module and a fault alarm lamp are arranged on the front side of the external hanging machine; the back of the external hanging machine is provided with a mounting slide rail; one side surface of the external hanging machine is provided with a Modbus interface, a power input interface and a USB data interface; and the other side surface of the external hanging machine is provided with a forced reset button and a network interface.
On the basis of the technical scheme, the analog output channel can output 24V power, and the switching value output channel is a dry contact output.
The invention has the beneficial effects that:
1) the device has the advantages of integration, small capacity and portability, and has better adaptability to units with different unit capacities, different unit measuring point arrangements, different electric pump capacity design sizes and different average running load ratios.
2) Three calculation models, namely model A/model B/model C, are preset in the controller, the preset models can support multi-signal input and partial signal input, and recommendation models and process data are output according to simulation calculation results.
3) The judgment condition that the simulation result is preset in the controller comprises the following steps: a. whether the unit RB can be quickly reduced to the range of the electric pump capacity design at the moment after the steam pump is tripped; b. whether the opening degree of the scoop tube can be added to a normal value of the water supply flow within a specified time after the electric pump is started; c. whether the outlet pressure can quickly meet the requirement of the water supply flow after the electric pump is started; d. whether the water level of the deaerator fluctuates within a normal range.
4) The device can not only perform simple simulation calculation, but also perform an actual test according to the result of the simulation calculation, and add judgment conditions or modify partial conditions according to the actual condition of an actual test unit.
5) The stable and mature Modbus interface and the USB data transmission interface support various types of signal output, and can transmit process test data for subsequent test analysis.
The parts of the device not involved are the same as or can be implemented using prior art.
Drawings
FIG. 1 is a schematic diagram of a characteristic testing device for an externally-mounted type power station water supply system in an embodiment of the invention;
FIG. 2 is a schematic diagram of a characteristic test device of an externally-mounted power station water supply system in the embodiment of the invention;
FIG. 3 is a front elevation view of an embodiment of an onhook of the present invention;
FIG. 4 is a rear view of an embodiment of an outboard hook in accordance with the invention;
FIG. 5 is a right side view of an embodiment of an onhook of the present invention;
fig. 6 is a left side view of an outboard hook in an embodiment of the present invention.
Reference numerals:
1-DCS; 2-an upper computer; 3-hanging the machine;
31-a signal input module; 311-Modbus interface;
32-a signal output module; 321-analog output channel; 322-switching value output channel;
33-a controller module;
34-an auxiliary module; 341-data storage module; 342-a power conversion module; 343-power indicator light; 344-mounting a slide rail; 345-power input interface; 346-USB data interface; 347-fault warning light; 348-forced reset button;
35-a network module; 351-network interface.
Detailed Description
Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout.
In the description of the present invention, it should be noted that, for the terms of orientation, such as "central", "lateral (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate that the orientation and positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and should not be construed as limiting the specific scope of the present invention.
The technical scheme and the beneficial effects of the invention are clearer and clearer by further describing the specific embodiment of the invention with the accompanying drawings of the specification. The embodiments described below are exemplary and are intended to be illustrative of the invention, but are not to be construed as limiting the invention.
Referring to fig. 1 and 2, an embodiment of the present invention provides an externally-mounted power station water supply system characteristic test apparatus, including a DCS1, an externally-mounted machine 3 and an upper computer 2, where the externally-mounted machine 3 includes a signal input module 31, a controller module 33, a signal output module 32 and a network module 35;
The signal input module 31 is used for acquiring data signals in the DCS 1;
the controller module 33 comprises a simulation mode and an actual test mode which can be switched with each other; the controller module 33 is internally provided with a preset model, and can judge the optimal test data according to the result of the simulation calculation and generate an instruction signal; in this embodiment, the controller module 33 is internally provided with a preset model a/model B/model C, simulation calculation is performed according to different models, loads, measurement point arrangement, electric pump capacity and the like, optimal test data is recommended according to the result of the simulation calculation to guide an actual test, partial parameters are modified according to actual conditions, and the actual test is safer and more controllable. After the device accesses partial signals or all preset signals from the DCS, a preset model in the controller is called in the upper computer, and simulation tests of the water supply characteristic test are respectively carried out. The model base is constructed based on a specific algorithm and used for representing the advantages and disadvantages of the characteristic test of the power station water supply system. The determination conditions of the result of the simulation calculation include: a. whether the unit RB can be quickly reduced to the range of the electric pump capacity design at the moment after the steam pump is tripped; b. whether the opening degree of the scoop tube can be added to a normal value of the water supply flow within a specified time after the electric pump is started; c. whether the outlet pressure can quickly meet the requirement of the water supply flow after the electric pump is started; d. whether the water level of the deaerator fluctuates within a normal range. And judging conditions can be added or partial conditions can be modified according to actual conditions by using administrator permission in the upper computer.
The signal output module 32 is configured to output a command signal to the DCS 1;
the network module 35 is used for realizing interaction between the controller module 33 and the upper computer 2;
the upper computer 2 is used for calling a preset model in the controller module 33 to perform simulation calculation of a water supply system characteristic test on the acquired data signals. Specifically, the upper computer 2 may modify parameters of a preset model inside the controller module 33 and display the parameters in real time.
Specifically, the signal input module 31 is a Modbus module, and the Modbus module communicates with the DCS1 through a Modbus interface 311; the data signals collected in the DCS1 comprise analog quantity signals, switching quantity signals and rotating speed signals. Not only can access 4-20 mA analog quantity signals and switching value signals, but also can access rotating speed signals with the range of 0-8000 r/min.
Specifically, the data signals collected by the signal input module 31 in the DCS1 include a low water supply flow analog signal, an electric pump outlet pressure analog quantity signal, a steam pump outlet pressure analog quantity signal, an electric pump recirculation regulating valve analog quantity signal, a steam pump recirculation regulating valve analog quantity signal, an electric pump inlet filter screen differential pressure analog quantity signal, a steam pump inlet filter screen differential pressure analog quantity signal, a deaerator liquid level analog quantity signal, a unit load analog quantity signal, an electric pump rotation speed signal, a steam pump rotation speed signal, an electric pump scoop tube opening analog quantity signal, an electric pump outlet electric valve opening feedback signal, a steam pump outlet electric valve opening feedback signal, and a water supply pump outlet main tube pressure analog quantity signal.
Specifically, the command signals output by the signal output module 32 include a valve command for controlling the recirculation valve and a start-stop command for controlling the electric pump. The control circuit is used for controlling the recirculation valve, and the sent 4-20 mA signal corresponds to 0-100% of valve opening; the switching value output channel 7 is used for starting the electric pump and is connected in series with an electric starting loop of the electric pump. And before an actual experiment, the instruction signals are led out through the signal output module and are connected to the corresponding control cabinet by using hard wires. For example, one path is led out from an analog output channel and used for controlling a recirculation valve of an electric pump, and the sent 4-20 mA signal corresponds to the valve position opening of 0-100%; one path is led out from the switching value output channel and used for starting the electric pump, and the switching value output channel is directly connected into an electric starting loop of the electric pump in series. After the external checking condition is ready, the simulation mode is switched to the actual test mode in the controller, the test is started, and the process data of the actual test is exported through the USB data interface.
Specifically, the external hanging device 3 further comprises an auxiliary module 34, wherein the auxiliary module 34 comprises a power conversion module 342 and a data storage module 341; the power conversion module 342 is configured to convert an input 220V ac voltage into a dc 24V, which is used as an AO channel power supply; the data storage module 341 is used for storing the relevant data of the controller module 33.
Referring to fig. 3 to 6, the front surface of the external hanging machine 3 is provided with a controller module 33, a signal input module 31, a power conversion module 342, a power indicator lamp 343, a data storage module 341, an analog output channel 321, a switching value output channel 322, a network module 35, and a fault warning lamp 347; the back of the outer hanging machine 3 is provided with a mounting slide rail 344; one side surface of the external hanging machine 3 is provided with a Modbus interface 311, a power input interface 345 and a USB data interface 346; the other side of the offhook 3 is provided with a forced reset button 348 and a network interface 351. When power is input into the power input interface, the power indicator lamp of the device is turned into green. The controller calculates related data and stores the data in the data storage module, the related data can be led out by using a USB data interface, when a fault alarm lamp is turned on red, a forced reset button needs to be pressed and kept for 10 seconds, and the controller is reset. The back of the outer hanging machine is provided with a sliding rail, so that the outer hanging machine can be conveniently installed in the control cabinet. The network module is used for interacting with an upper computer, can access a network cable into a network interface, and is used for modifying logic in the controller and extracting field data to facilitate modeling.
Specifically, the analog output channel 321 can output 24V power, and the switching value output channel 322 is a dry contact output.
The working principle of the invention is as follows:
1) the device is provided with a 220V alternating current power supply interface, and a power supply conversion module is arranged in the device and can convert and output 24V direct current signals.
2) Adopt the Modbus communication between outboard motor and the DCS, at first insert the signal in the DCS, contain the low analog quantity signal of feedwater flow usually, charge pump export pressure analog quantity signal, vapour pump export pressure analog quantity signal, charge pump recirculation transfers valve analog quantity signal, vapour pump recirculation transfers the valve, charge pump entry filter screen differential pressure analog quantity signal, vapour pump entry filter screen differential pressure analog quantity signal, deaerator liquid level analog quantity signal, unit load analog quantity signal, charge pump rotational speed signal, vapour pump rotational speed signal, charge pump spoon pipe aperture analog quantity signal, charge pump export electric motor valve opening feedback signal, vapour pump export electric motor valve opening feedback signal, the female pipe pressure analog quantity signal of feedwater pump export.
3) After a part of signals or all the preset signals are accessed, a preset model in the controller 1 is called in the upper computer, and the water supply characteristic test is actually carried out before simulation test. The model base is constructed based on a specific algorithm and is used for representing the advantages and disadvantages of the characteristic test of the power station water supply system.
4) Simulation calculation of a water supply system characteristic test is performed by using a built-in model A/model B/model C, and judgment conditions of a result of the simulation calculation include: a. whether the unit RB (Run Back, namely the rapid load reduction) at the moment after the steam pump trips can be rapidly reduced to the range of the design of the capacity of the electric pump or not is judged; b. whether the opening degree of the scoop tube can be added to a normal value of the water supply flow within a specified time after the electric pump is started; c. whether the outlet pressure can quickly meet the requirement of the water supply flow after the electric pump is started; d. whether the water level of the deaerator fluctuates within a normal range. And judging conditions can be added or partial conditions can be modified according to actual conditions by using administrator permission in the upper computer.
5) Optimizing the simulation result according to the judgment condition, recommending the adopted model, and outputting the result of the model simulation calculation through the data transmission module so as to guide the actual characteristic test.
6) And before an actual experiment, the instruction signal is led out through the signal output module and is connected to the corresponding control cabinet by using a hard wire.
7) After the external checking condition is ready, the simulation mode is switched to the actual test mode in the controller, the test is started, and the process data of the actual test is exported.
In the description of the specification, references to the description of "one embodiment", "preferably", "an example", "a specific example" or "some examples" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention, and the schematic representation of the term in this specification does not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The present invention is not limited to the above-described embodiments, and it will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and such modifications and improvements are also considered to be within the scope of the present invention. Those not described in detail in this specification are well within the skill of the art.
Claims (9)
1. The utility model provides an outer hanging power station water supply system characteristic test device, includes DCS (1), outer hanging machine (3) and host computer (2), its characterized in that: the out-hook (3) comprises a signal input module (31), a controller module (33), a signal output module (32) and a network module (35);
the signal input module (31) is used for acquiring data signals in the DCS (1);
the controller module (33) comprises a simulation mode and an actual test mode which can be switched with each other; the controller module (33) is internally provided with a preset model, and can judge the optimal test data according to the result of the simulation calculation to generate an instruction signal;
the signal output module (32) is used for outputting a command signal to the DCS (1);
the network module (35) is used for realizing interaction between the controller module (33) and the upper computer (2);
and the upper computer (2) is used for calling a preset model in the controller module (33) to perform simulation calculation of the water supply system characteristic test on the acquired data signals.
2. The external power station water supply system characteristic test device as claimed in claim 1, characterized in that: the upper computer (2) can modify the parameters of the preset model in the controller module (33) and display the data in real time.
3. The externally-hung type power station water supply system characteristic test device as claimed in claim 1, wherein the judgment condition of the result of the simulation calculation comprises: a. whether the unit RB can be quickly reduced to the range of the electric pump capacity design at the moment after the steam pump is tripped; b. whether the opening degree of the scoop tube can be added to a normal value of the water supply flow within a specified time after the electric pump is started; c. whether the outlet pressure can quickly meet the requirement of the water supply flow after the electric pump is started; d. whether the water level of the deaerator fluctuates within a normal range.
4. The externally-hung type power station water supply system characteristic test device as claimed in claim 1, wherein: the signal input module (31) is a Modbus module, and the Modbus module is communicated with the DCS (1) through a Modbus interface (311); the data signals collected in the DCS (1) comprise analog quantity signals, switching quantity signals and rotating speed signals.
5. The externally-hung type power station water supply system characteristic test device as claimed in claim 1, wherein: the signal input module (31) collects data signals in the DCS (1) and comprises a water supply flow low-low analog quantity signal, an electric pump outlet pressure analog quantity signal, a steam pump outlet pressure analog quantity signal, an electric pump recirculation regulating valve analog quantity signal, a steam pump recirculation regulating valve analog quantity signal, an electric pump inlet filter screen differential pressure analog quantity signal, a steam pump inlet filter screen differential pressure analog quantity signal, a deaerator liquid level analog quantity signal, a unit load analog quantity signal, an electric pump rotating speed signal, a steam pump rotating speed signal, an electric pump scoop tube opening analog quantity signal, an electric pump outlet electric valve opening feedback signal, a steam pump outlet electric valve opening feedback signal and a water supply pump outlet main tube pressure analog quantity signal.
6. The external power station water supply system characteristic test device as claimed in claim 1, characterized in that: the command signals output by the signal output module (32) comprise a valve command for controlling a recirculation valve and a start-stop command for controlling an electric pump.
7. The external power station water supply system characteristic test device as claimed in claim 1, characterized in that: the off-hook (3) further comprises an auxiliary module (34), the auxiliary module (34) comprising a power conversion module (342) and a data storage module (341); the power supply conversion module (342) is used for converting the input 220V alternating voltage into direct current 24V and outputting the direct current 24V as an AO channel power supply; the data storage module (341) is used for storing relevant data of the controller module (33).
8. The externally-hung type power station water supply system characteristic test device as claimed in claim 1, wherein: the front side of the outer hanging machine (3) is provided with a controller module (33), a signal input module (31), a power supply conversion module (342), a power supply indicator lamp (343), a data storage module (341), an analog quantity output channel (321), a switching value output channel (322), a network module (35) and a fault alarm lamp (347); the back of the outer hanging machine (3) is provided with a mounting slide rail (344); one side surface of the external hanging machine (3) is provided with a Modbus interface (311), a power input interface (345) and a USB data interface (346); the other side surface of the outer hanging machine (3) is provided with a forced reset button (348) and a network interface (351).
9. The external power station water supply system characteristic test device of claim 8, characterized in that: the analog quantity output channel (321) can output 24V power supply, and the switching value output channel (322) is a dry contact output.
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| CN102621945B (en) * | 2012-03-05 | 2014-03-26 | 内蒙古自治区电力科学研究院 | Efficiency dynamic optimizing operation closed-loop optimization control method based on optimum operating conditions of thermal generator set |
| CN205540017U (en) * | 2016-04-07 | 2016-08-31 | 西安西热控制技术有限公司 | Embedded PLC simulator |
| CN107420874B (en) * | 2017-08-16 | 2021-12-14 | 江苏大唐国际吕四港发电有限责任公司 | Ultra-supercritical thermal generator set coordination control system |
| CN108803508A (en) * | 2018-05-28 | 2018-11-13 | 中国神华能源股份有限公司 | Power Plant Thermal control algolithm application system and method |
| CN109189022B (en) * | 2018-09-13 | 2020-12-08 | 华电电力科学研究院有限公司 | Thermal power factory thermal automation system integral framework |
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2021
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