CN113433978A - Unit water supply control system optimization method - Google Patents
Unit water supply control system optimization method Download PDFInfo
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- CN113433978A CN113433978A CN202110750233.3A CN202110750233A CN113433978A CN 113433978 A CN113433978 A CN 113433978A CN 202110750233 A CN202110750233 A CN 202110750233A CN 113433978 A CN113433978 A CN 113433978A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 214
- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000005457 optimization Methods 0.000 title claims description 9
- 230000003993 interaction Effects 0.000 claims abstract description 30
- 238000004891 communication Methods 0.000 claims description 35
- 239000010882 bottom ash Substances 0.000 claims description 11
- 239000013307 optical fiber Substances 0.000 claims description 11
- 239000002893 slag Substances 0.000 claims description 9
- 238000003860 storage Methods 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 5
- 238000005086 pumping Methods 0.000 claims description 4
- 239000013589 supplement Substances 0.000 claims description 4
- 239000002351 wastewater Substances 0.000 claims description 4
- 238000009420 retrofitting Methods 0.000 claims 8
- 230000006872 improvement Effects 0.000 description 10
- 230000003287 optical effect Effects 0.000 description 9
- 238000012544 monitoring process Methods 0.000 description 5
- 239000002956 ash Substances 0.000 description 4
- 230000032683 aging Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000005693 optoelectronics Effects 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 230000003111 delayed effect Effects 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000009960 carding Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002715 modification method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D9/00—Level control, e.g. controlling quantity of material stored in vessel
- G05D9/12—Level control, e.g. controlling quantity of material stored in vessel characterised by the use of electric means
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B1/00—Methods or layout of installations for water supply
- E03B1/02—Methods or layout of installations for water supply for public or like main supply for industrial use
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B7/00—Water main or service pipe systems
- E03B7/07—Arrangement of devices, e.g. filters, flow controls, measuring devices, siphons or valves, in the pipe systems
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Abstract
The invention belongs to the field of unit equipment of a generating set of a power plant, and particularly provides a method for optimizing a water supply control system of a unit, which is characterized in that a control module of the water supply control system of the unit to be optimized is replaced by a PLC (programmable logic controller) control module, and man-machine interaction equipment is arranged on the unit to be optimized and adjacent units of the unit to be optimized; configuring a control logic of a PLC control module; configuring a unit to be optimized and human-computer interaction equipment of adjacent unit units; configuring so that the first human-computer interaction device of the unit to be optimized receives a state signal of local equipment from the PLC control module and sends a control signal of the local equipment to the PLC control module; the configuration is such that the second human-computer interaction device of an adjacent crew unit outputs all or part of the display information of the first human-computer interaction device. The invention can realize scientific control and optimal configuration of the water supply control system and improve the stability of the water supply control system of the thermal power plant.
Description
Technical Field
The invention belongs to the technical field of unit equipment of a power plant unit, relates to a modification technology of an instrument air system, and particularly relates to a modification method of an air compressor controller of the unit instrument air system of the power plant unit.
Background
With the change of a power generation task of a thermal power plant from a base load type to a peak regulation type, the existing water supply control system built into each unit of the thermal power plant generally has the problem of modification. The PLC control equipment of the unit water supply system is a product in the last 90 th century, the equipment aging condition is serious, the current operation failure rate is high, the communication is unstable, an operation interface of an upper computer is not friendly, the equipment configuration is complicated, the centralized control of field equipment cannot be realized, and the trial technical exploration of the peak-exchanging type power generation task in the production of a thermal power plant is difficult to realize.
Disclosure of Invention
The invention aims to provide an optimization method of a unit water supply control system, which is used for realizing scientific control and optimal configuration of the water supply control system and improving the stability of the water supply control system; meanwhile, centralized control of field devices is realized, so that personnel configuration is optimized, quality and efficiency are improved, and the automation control level of the thermal power plant is improved.
The invention has the technical conception that a water supply control system of a generator set unit is optimized and improved, and a small PLC controller is adopted to independently write an upper computer control program and a human-computer interaction interface.
The technical scheme provided by the invention is a method for optimizing a unit water supply control system, which comprises the following steps:
step 10, replacing a control module of a water supply control system of a unit to be optimized into a PLC control module, and arranging human-computer interaction equipment on the unit to be optimized and adjacent unit units thereof; introducing a pipe network of the water supply control system of the unit to be optimized into a water supply pool of the adjacent unit, and arranging a valve controlled by the PLC control module;
step 20, configuring a control logic of the PLC control module;
step 30, configuring the unit to be optimized and the human-computer interaction equipment of the adjacent unit; the configuration enables the first human-computer interaction device of the unit to be optimized to receive the state signal of the local device thereof from the PLC control module and send the control signal of the local device thereof to the PLC control module; the configuration enables the second human-computer interaction device of the adjacent unit to output all or part of the display information of the first human-computer interaction device.
The further improvement is that when the step 10 is implemented, the PLC control module is selected according to all input and output point positions of local equipment of the water supply control system of the unit to be optimized; replacing a control module of a water supply control system of the unit to be optimized by using the PLC control module; and the communication link between the PLC control module and the first human-computer interaction device and the communication link between the PLC control module and the second human-computer interaction device comprise optical fiber connection.
In a further improvement, the control logic of step 20 comprises:
when the bottom ash systems of the adjacent unit units need to discharge slag and water, the water supply tank of the unit to be optimized is stored and pumped to the water supply tank of the adjacent unit for use; and when the bottom ash systems of the adjacent unit units do not need to discharge slag and water, pumping the redundant wastewater of the unit to be optimized to a water supply tank of the unit for water storage.
In a further improvement, the on-site equipment of the unit water supply control system to be optimized is designed to at least comprise an overflow pump A, an overflow pump B outlet door V1, an overflow pump B to adjacent unit water supply tank communication door V2, an overflow pump B to local unit water supply tank water replenishment door V3, a local unit water supply tank to overflow tank water replenishment door V4, an overflow tank level meter L1 and a local unit water supply tank level meter L2.
In a further improvement, the control logic of step 20 comprises:
setting an overflow pump control mode bit register, wherein the overflow pump control mode comprises an overflow pump automatic gear and an overflow pump automatic gear;
setting a preposed selection position register of an overflow pump, wherein the preposed selection of the overflow pump comprises a preposed overflow pump A and a preposed overflow pump B;
and setting an overflow tank water replenishing door mode bit for storage, wherein the overflow tank water replenishing door mode comprises an automatic water replenishing door gear and a manual water replenishing door gear.
In a further improvement, the control logic of step 20 comprises: the overflow pump control mode is allowed to switch into the overflow pump automatic gear only when the overflow pump is advanced with the overflow pump B advanced and the received overflow pump B auto run enable signal.
A further improvement consists in that the generation of the overflow pump B allows the automatic operation signal to satisfy at least the following conditions simultaneously:
condition 1, the outlet door V1 of the overflow pump B is in an open state;
in condition 2, one of the overflow pump B to the adjacent unit feed water tank communication gate V2 or the overflow pump B to the unit feed water tank replenishment gate V3 must be in an open state.
In a further improvement, when the overflow tank water replenishing door mode is in the automatic water replenishing door gear, the control logic of the PLC control module comprises:
an overflow pump A, an overflow pump B, an outlet door V1 of the overflow pump B, a communication door V2 from the overflow pump B to a water supply pool of an adjacent unit, a water replenishing door V3 from the overflow pump B to a water supply pool of the unit, and a water replenishing door V4 from the water supply pool of the unit to the overflow pool
When the overflow pump A is arranged in front, the overflow pump B does not automatically act to the water replenishing door V3 of the water supply tank of the unit; when the overflow pump B is in the forward and running state and the overflow pump B outlet gate V1 is closed, the unit water supply tank to overflow tank refill gate V4 automatically runs according to a logic.
In a further improvement, the logic for automatically operating the unit water supply tank to overflow tank refill door V4 comprises:
when the water level of the overflow tank is lower than the first height, the water supply tank of the unit is opened to an overflow tank water supplement door V4;
when the water level of the overflow tank is higher than the second height, closing a water supply tank of the unit to an overflow tank water replenishing door V4;
when the overflow pump preposition selection is switched to the overflow pump A preposition, or the overflow pump B preposition is not operated or stopped operating, closing the water supply tank of the unit to the overflow tank water supply door V4;
wherein,
the first height is less than the second height.
The further improvement is that when the switching condition of opening or closing the water supply tank to overflow tank water supply door V4 is satisfied, the opening or closing action is executed after a delay.
The invention provides a method for modifying an air compressor controller, which has the technical effects of but not limited to: the method is suitable for occasions in which the safe operation risk of the water supply control system equipment of the generator unit is greatly increased and the improvement and the upgrade are urgently needed due to the aging of the PLC system on site. The PLC is upgraded to realize scientific control and optimized configuration of the water supply system, and the stability and reliability of the water supply system are greatly improved; the communication mode is upgraded to optical fiber communication from MODBUS PLUS and other serial cables, and the operation picture can be merged into the two-unit dust removal control system, so that the centralized control of the field equipment is realized.
Drawings
FIG. 1 is a schematic diagram of a system architecture of a water supply control system modified by a method for optimizing a unit water supply control system according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a water supply network configuration of an on-site installation of the water supply control system of FIG. 1;
FIG. 3 is a display of information output by the first human machine interface and the second human machine interface of the water supply control system of FIG. 1.
Detailed Description
Firstly, the invention mainly solves the problems of improving a water supply PLC control system, installing a PLC controller and supporting equipment, compiling an upper computer control program and controlling a display picture, and realizing scientific control and optimal configuration of the water supply system, thereby improving the stability and reliability of the water supply system. In order to realize the method, the original PLC control system equipment needs to be dismantled, a new PLC control cabinet is added, and an upper computer control program is compiled to finish the debugging work of the equipment. The optimization method of some embodiments of the invention introduces a unit water supply operation picture into a two-unit ash removal control room at the same time, thereby realizing centralized control of field devices.
The embodiment provides a method for optimizing a unit water supply control system, and particularly optimizes the water supply control system of one unit (unit) of the existing thermal power plant. As further explanation in this embodiment may refer to different descriptions of similar components, the same reference numbers in this description refer to the same or similar components, unless otherwise specified.
In this embodiment, a unit includes two generators 1 and 2, and referring to fig. 2, a water supply control system of the unit includes operation control of an overflow pump a and an overflow pump B, collection of a water supply tank liquid level and an overflow tank liquid level, and control of a plurality of valves including a water supply valve in a water supply pipeline, and all control is realized by a PLC controller.
To upgrade a water supply control system of a unit, the original PLC control architecture needs to be completely removed, and a new PLC control module and supporting equipment need to be reinstalled. And simultaneously compiling control logic and operation pictures of the upper computer. Thereby realizing the optimization and upgrade of a unit water supply control system. When a communication optical cable of the unit water supply local control equipment is laid and debugged, laying the communication optical cable and welding optical fibers, installing an optoelectronic converter, laying a communication network cable, and connecting the switch with the PLC communication module through the optical cable; the photoelectric conversion is selected according to the type of the single/multimode optical fiber, one twisted pair (three-channel transmission) is adopted in the original water supply control system of one unit, referring to fig. 1, after optimization, a network cable (electric port) - (electric-to-optical) optical cable (optical-to-electric) -network cable (electric port) is adopted, and communication connection (single-mode optical fiber, single-port transceiving) is realized through one cable. And laying a network cable from the upper computer of the water supply system to the switch of the water supply system, and realizing the connection between the upper computer and the PLC.
The new water supply control system obtained by implementing the optimization method of the water supply control system of the unit of the embodiment and referring to fig. 1, fig. 2 and fig. 3 comprises the following steps 10 to 30.
Step 10, replacing a control module of a water supply control system of a unit to be optimized into a PLC control module, and arranging human-computer interaction equipment on the unit to be optimized and adjacent unit units thereof; and introducing the pipe network of the water supply control system of the unit to be optimized into the water supply tank of the adjacent unit, and setting a valve controlled by the PLC control module.
Considering a preferred implementation, in order to achieve a better technical effect, when the step 10 is implemented, the PLC control module is selected according to all input and output points of the on-site equipment of the water supply control system of the unit to be optimized; replacing a control module of a water supply control system of the unit to be optimized by using the PLC control module; and the communication link between the PLC control module and the first human-computer interaction device and the communication link between the PLC control module and the second human-computer interaction device comprise optical fiber connection.
Specifically, in the present embodiment, the on-site equipment of the unit water supply control system to be optimized is designed to at least include an overflow pump a, an overflow pump B, an outlet door V1 of the overflow pump B, an overflow pump B to adjacent unit water supply tank connection door V2, an overflow pump B to the unit water supply tank replenishment door V3, a unit water supply tank to overflow tank replenishment door V4, an overflow tank level meter L1, and a unit water supply tank level meter L2.
Specifically, step 10 includes establishing a communication loop: powering off the PLC control cabinet, and installing a Schneider series PLC bottom plate, a CPU, an I/O sub-module and a communication module; completing the wiring of the on-site equipment and the I/O sub-module by using the old control cable; laying a communication optical cable and welding optical fibers, installing an optoelectronic converter, laying a communication network cable, and connecting the switch with the PLC communication module through the optical cable; laying a water supply system upper computer to a water supply system switch network cable, realizing the connection of the upper computer and a PLC (programmable logic controller), and facilitating the upper computer serving as a human-computer interaction device to monitor the state of the on-site equipment; the controller and the module are powered on, the LED status lamp displays normal, and the LED status lamp has logic program configuration and downloading conditions.
And 20, configuring the control logic of the PLC control module. Step 20 the control logic comprises: when the bottom ash systems of the adjacent unit units need to discharge slag and water, the water supply tank of the unit to be optimized is stored and pumped to the water supply tank of the adjacent unit for use; and when the bottom ash systems of the adjacent unit units do not need to discharge slag and water, pumping the redundant wastewater of the unit to be optimized to a water supply tank of the unit for water storage.
Specifically, in the step, digital quantity and analog quantity point position statistics, point table design and control equipment carding and equipment power supply mode modification statistics of local equipment of a water supply control system C of a thermal power plant are carried out, and the PLC control module is configured according to all input and output point positions and control logic of the local equipment.
Preferably, in this embodiment, the control logic in step 20 includes: the overflow pump control mode is allowed to switch into the overflow pump automatic gear only when the overflow pump is advanced with the overflow pump B advanced and the received overflow pump B auto run enable signal.
Preferably, in this embodiment, the control logic in step 20 includes:
setting an overflow pump control mode bit register, wherein the overflow pump control mode comprises an overflow pump automatic gear and an overflow pump automatic gear;
setting a preposed selection position register of an overflow pump, wherein the preposed selection of the overflow pump comprises a preposed overflow pump A and a preposed overflow pump B;
and setting an overflow tank water replenishing door mode bit for storage, wherein the overflow tank water replenishing door mode comprises an automatic water replenishing door gear and a manual water replenishing door gear.
Preferably, in this embodiment, the generation of said overflow pump B allows the automatic operation signal to satisfy at least the following conditions simultaneously:
condition 1, the outlet door V1 of the overflow pump B is in an open state;
in condition 2, one of the overflow pump B to the adjacent unit feed water tank communication gate V2 or the overflow pump B to the unit feed water tank replenishment gate V3 must be in an open state.
Preferably, in this embodiment, when the overflow tank water replenishing door mode is in the automatic water replenishing door shift, the control logic of the PLC control module includes:
when the overflow pump A is arranged in front, the overflow pump B does not automatically act to the water replenishing door V3 of the water supply tank of the unit; when the overflow pump B is in the forward and running state and the overflow pump B outlet gate V1 is closed, the unit water supply tank to overflow tank refill gate V4 automatically runs according to a logic.
Preferably, in this embodiment, the logic that the unit water supply tank to overflow tank water supplement gate V4 automatically operates includes:
when the water level of the overflow tank is lower than the first height, the water supply tank of the unit is opened to an overflow tank water supplement door V4;
when the water level of the overflow tank is higher than the second height, closing a water supply tank of the unit to an overflow tank water replenishing door V4;
when the overflow pump preposition selection is switched to the overflow pump A preposition, or the overflow pump B preposition is not operated or stopped operating, closing the water supply tank of the unit to the overflow tank water supply door V4;
wherein,
the first height is less than the second height.
Preferably, in this embodiment, when the switching condition of opening or closing the water supply tank to overflow tank water supply gate V4 is satisfied, the opening or closing operation is performed after a delay.
Exemplarily, the control logic drawing process of a PLC control module includes: adding hardware configuration in the logic software Unity Pro 2.3 of the upper computer of the water supply system according to the hardware configuration of the communication controller, and configuring the address of the communication module; and (3) according to the water supply system local equipment control strategy and requirements, distributing a point table in the logic software Unity Pro 2.3 and drawing the logic of the ladder diagram.
Description of the logic flow: the program mainly realizes the manual and automatic control of two overflow pumps, a water supply pool, the liquid level of the overflow pool and related valves of the water supply system. Some specific configurations are exemplarily given in the present embodiment:
the overflow pump A is started manually without condition; b, when the overflow pump is manually started, an outlet door of the overflow pump must be opened, and one of a water replenishing door of the first-stage water supply tank and a connection door of the second-stage water supply tank must be opened;
before the overflow pump is put into operation automatically, the pre-pump must be selected, and the condition is unconditional when the overflow pump A is selected to be put into operation automatically; when the overflow pump B is selected to be automatically started, an automatic permission indicator lamp signal of the overflow pump B is required,
condition 1, overflow pump B outlet gate V1 on signal;
the permission condition 2, the primary water supply tank replenishing door V2 or the secondary water supply tank communication door V3 must have an open.
The logic after the overflow tank water replenishing door is automatically thrown is as follows: when the overflow pump A is arranged in front, the overflow tank water replenishing door V3 does not automatically act; the pump B is arranged in front and operates, an outlet door V1 of the overflow pump is closed, and a water replenishing door V4 of the overflow pool participates in control; when the overflow pump B is preposed and operates, the water level of the overflow tank is less than 5.4 meters, and the water replenishing door is automatically opened (the execution is delayed for 5 seconds); when the overflow pump B is preposed and runs, the water level of the overflow tank is more than 5.9 meters, and the water replenishing door is automatically closed (the time is delayed for 5 seconds); the switching is carried out so that the overflow pump A is in the front position, or the overflow pump B is in the front position but the operation is not carried out or the operation is stopped, and the water door V4 is automatically closed. Compiling and downloading the logic configuration, checking whether the state lamp of the controller is normal or not, monitoring the logic normally, and confirming that the data collected by the upper computer of the water supply system is consistent with the actual data of the on-site equipment.
Step 30, configuring the unit to be optimized and the human-computer interaction equipment of the adjacent unit; the configuration enables the first human-computer interaction device of the unit to be optimized to receive the state signal of the local device thereof from the PLC control module and send the control signal of the local device thereof to the PLC control module; the configuration enables the second human-computer interaction device of the adjacent unit to output all or part of the display information of the first human-computer interaction device.
Specifically, in this embodiment, the first human-computer interaction device of the first unit and the second human-computer interaction device of the second unit are both upper computers of the water supply system, and the operation picture is manufactured by the following method: editing a monitoring picture of upper computer equipment of a water supply system of a unit in the upper computer picture software Intouch 9.5, and synchronizing the monitoring picture to an upper computer of a bottom ash system of a unit two; the monitoring screen refers to fig. 3. Editing the collected data to establish a trend group, so that the collected data can be conveniently compared transversely and subjected to history tracing; when the collected real-time data meet certain logic conditions, the color of the upper computer picture equipment is highlighted, and acousto-optic alarm is triggered;
preferably, in this embodiment, after step 20 is executed, a unit water supply control system device debugging and protection interlock test is performed. After the unit water supply control system is transformed, the stability of the control system is greatly improved, and the reliable operation of water supply system equipment is facilitated. After the unit water supply control system is transformed, the problems of old PLC equipment, unstable communication, non-intuitive operation of programming software and the like of the unit water supply system are solved; the control picture is merged into the two-unit dedusting control chamber, so that the configuration of operators is optimized, the labor cost is saved, and the safety and the stability of the one-unit water supply control system are fundamentally improved
The innovation points are as follows:
1. the communication mode between the upper computer and the PLC is upgraded from twisted-pair serial ports to optical fiber communication, so that the communication is more stable and reliable; laying a communication optical cable and welding the optical fiber, wherein the PLC cannot be directly connected with the optical fiber, so that an optoelectronic converter is required to be installed to convert an optical signal into a network cable signal, laying a communication network cable, and connecting the switch with a PLC communication module through the optical cable;
2. the integration and the network interconnection of the water supply PLC control system and the bottom ash PLC control system are realized, and a scheme is provided for the centralized integrated control and monitoring of the PLC system; the operation picture of water supply of one unit is introduced into the operation picture of the bottom ash system of the ash removal control chamber of the two units, so that the centralized control of field equipment is realized, and the method has important significance for optimizing personnel configuration, improving quality and efficiency and improving the automation control level of the whole plant.
It is easy to understand that the system functions in the present embodiment include: in order to optimize the water scheduling for slag flushing of the two units, the water supply tank of one unit is used as the extension of the water supply tank of the two units, and the redundant water in the water supply tank of the two units is temporarily stored in the water supply tank of the one unit; when the two-unit bottom ash system needs to discharge slag and use water, pumping the overflow pump B for storing water in the first unit water supply tank to the two-unit water supply tank for use; when the two-unit bottom ash system does not need to discharge slag and water temporarily, the redundant wastewater of one unit is pumped to a water supply tank of the other unit by an overflow pump A to store water.
At least one embodiment of the invention takes a unit of a thermal power plant as an example to illustrate the technical effect of the invention. The PLC control equipment of the one-unit water supply control system is a product of the 90 th century in Schneider, the ageing condition of the equipment is serious, the failure rate of the existing operation is high, the communication is unstable, an operation interface of an upper computer is not friendly, and the equipment configuration is complicated. The existing plan is to optimize and improve a unit water supply control system, a small PLC is adopted, an upper computer control program and a control display picture are independently compiled, scientific control and optimal configuration of the water supply control system are realized, and the stability of the water supply control system can be greatly improved; meanwhile, an operation picture is introduced into the two-unit ash removal control room, so that centralized control of field equipment is realized, and the method has important significance for optimizing personnel configuration, improving quality and efficiency and improving the automation control level of the whole plant. In the embodiments, the water supply PLC control system is modified, the PLC controller and the supporting equipment are installed, the upper computer control program is compiled, the display picture is controlled, the scientific control and the optimized configuration of the water supply system are realized, and therefore the stability and the reliability of the water supply system are improved. In order to realize the method, the original PLC control system equipment needs to be dismantled, a new PLC control cabinet is added, and an upper computer control program is compiled to finish the debugging work of the equipment. Meanwhile, the water supply operation picture of one unit is introduced into the ash removal control chambers of two units, so that the centralized control of the field equipment is realized.
Claims (10)
1. A unit water supply control system optimization method is characterized in that: the method comprises the following steps:
step 10, replacing a control module of a water supply control system of a unit to be optimized into a PLC control module, and arranging human-computer interaction equipment on the unit to be optimized and adjacent unit units thereof; introducing a pipe network of the water supply control system of the unit to be optimized into a water supply pool of the adjacent unit, and arranging a valve controlled by the PLC control module;
step 20, configuring a control logic of the PLC control module;
step 30, configuring the unit to be optimized and the human-computer interaction equipment of the adjacent unit; the configuration enables the first human-computer interaction device of the unit to be optimized to receive the state signal of the local device thereof from the PLC control module and send the control signal of the local device thereof to the PLC control module; the configuration enables the second human-computer interaction device of the adjacent unit to output all or part of the display information of the first human-computer interaction device.
2. The optimization method according to claim 1, wherein in the step 10, the PLC control module is selected according to all input and output points of local equipment of the water supply control system of the unit to be optimized; replacing a control module of a water supply control system of the unit to be optimized by using the PLC control module; and the communication link between the PLC control module and the first human-computer interaction device and the communication link between the PLC control module and the second human-computer interaction device comprise optical fiber connection.
3. The air compressor controller retrofitting method according to claim 1, wherein said control logic of step 20 comprises:
when the bottom ash systems of the adjacent unit units need to discharge slag and water, the water supply tank of the unit to be optimized is stored and pumped to the water supply tank of the adjacent unit for use; and when the bottom ash systems of the adjacent unit units do not need to discharge slag and water, pumping the redundant wastewater of the unit to be optimized to a water supply tank of the unit for water storage.
4. The air compressor controller retrofitting method according to claim 3, wherein: the on-site equipment of the unit water supply control system to be optimized is designed to at least comprise an overflow pump A, an overflow pump B, an outlet door V1 of the overflow pump B, a connection door V2 from the overflow pump B to an adjacent unit water supply tank, a water replenishing door V3 from the overflow pump B to the unit water supply tank, a water replenishing door V4 from the unit water supply tank to the overflow tank, an overflow tank liquid level meter L1 and a unit water supply tank liquid level meter L2.
5. The air compressor controller retrofitting method according to claim 4, wherein: step 20 the control logic comprises:
setting an overflow pump control mode bit register, wherein the overflow pump control mode comprises an overflow pump automatic gear and an overflow pump automatic gear;
setting a preposed selection position register of an overflow pump, wherein the preposed selection of the overflow pump comprises a preposed overflow pump A and a preposed overflow pump B;
and setting an overflow tank water replenishing door mode bit for storage, wherein the overflow tank water replenishing door mode comprises an automatic water replenishing door gear and a manual water replenishing door gear.
6. The air compressor controller retrofitting method according to claim 5, wherein said control logic of step 20 comprises: the overflow pump control mode is allowed to switch into the overflow pump automatic gear only when the overflow pump is advanced with the overflow pump B advanced and the received overflow pump B auto run enable signal.
7. The air compressor controller retrofitting method according to claim 6, characterized in that the overflow pump B enable automatic operation signal is generated at least while satisfying the following conditions:
condition 1, the outlet door V1 of the overflow pump B is in an open state;
in condition 2, one of the overflow pump B to the adjacent unit feed water tank communication gate V2 or the overflow pump B to the unit feed water tank replenishment gate V3 must be in an open state.
8. The method for retrofitting an air compressor controller according to claim 7, wherein when the overflow tank refill door mode is in a refill door automatic gear, the control logic of the PLC control module comprises:
when the overflow pump A is arranged in front, the overflow pump B does not automatically act to the water replenishing door V3 of the water supply tank of the unit; when the overflow pump B is in the forward and running state and the overflow pump B outlet gate V1 is closed, the unit water supply tank to overflow tank refill gate V4 automatically runs according to a logic.
9. The air compressor controller retrofitting method according to claim 8, wherein the logic for automatic operation of said unit water supply tank to overflow tank refill door V4 comprises:
when the water level of the overflow tank is lower than the first height, the water supply tank of the unit is opened to an overflow tank water supplement door V4;
when the water level of the overflow tank is higher than the second height, closing a water supply tank of the unit to an overflow tank water replenishing door V4;
when the overflow pump preposition selection is switched to the overflow pump A preposition, or the overflow pump B preposition is not operated or stopped operating, closing the water supply tank of the unit to the overflow tank water supply door V4;
wherein,
the first height is less than the second height.
10. The air compressor controller retrofitting method according to claim 9, wherein when the switching condition of opening or closing of the water supply tank to overflow tank water supply door V4 is satisfied, the opening or closing is performed after a delay.
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Citations (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4880535A (en) * | 1989-02-21 | 1989-11-14 | Burrows Bruce D | Water supply station with multiple water storage reservoirs |
| JPH04167109A (en) * | 1990-10-31 | 1992-06-15 | Meidensha Corp | Water supply controller for plural distributing reservoirs |
| US20100300548A1 (en) * | 2009-06-01 | 2010-12-02 | Deverse Richard | Automated system for monitoring and maintenance of fluid level in swimming pools and other contained bodies of water |
| CN102681520A (en) * | 2012-06-04 | 2012-09-19 | 上海迪吉特控制系统有限公司 | Implementation method of operation interface of automatic plant start-up &and shut-down system |
| CN103809567A (en) * | 2014-02-19 | 2014-05-21 | 中国能源建设集团广东省电力设计研究院 | Field bus-based power plant integrated monitoring system |
| CN104775857A (en) * | 2015-04-15 | 2015-07-15 | 钱诚 | High-pressure cylinder rapid starting system for thermal power generation unit set |
| CN106120954A (en) * | 2016-08-17 | 2016-11-16 | 河南华润电力首阳山有限公司 | Thermal power plant's water circulation system |
| CN106506080A (en) * | 2016-10-10 | 2017-03-15 | 中广核工程有限公司 | A kind of field bus system and method based on nuclear power station water supply system |
| CN208685712U (en) * | 2018-07-09 | 2019-04-02 | 五华县自来水总公司 | A kind of water supply centralized control system based on degree and zoning |
| US20190144770A1 (en) * | 2016-06-13 | 2019-05-16 | Mitsubishi Hitachi Power Systems, Ltd. | Slag discharge system, gasifier provided with same, and method for operating slag discharge system |
| CN110005017A (en) * | 2019-05-13 | 2019-07-12 | 丹东川宇消防工程有限公司 | Totally-enclosed current stabilization laminates accumulation of energy water work |
| CN110632904A (en) * | 2019-09-18 | 2019-12-31 | 内蒙古祺迪科技有限公司 | Control method of automatic water supply system |
| CN110764481A (en) * | 2019-11-10 | 2020-02-07 | 许刚 | Distributed redundant constant-pressure water supply control system |
| CN110921962A (en) * | 2019-12-27 | 2020-03-27 | 西安热工研究院有限公司 | Anti-scaling system and method for wet slag removal system of thermal power plant |
| CN111411660A (en) * | 2020-04-29 | 2020-07-14 | 中国电建集团华东勘测设计研究院有限公司 | Technical water supply system of large-scale unit |
| CN212431456U (en) * | 2020-05-29 | 2021-01-29 | 大唐清苑热电有限公司 | Open cooling water system of high-backpressure circulating water heat supply unit |
| CN112796983A (en) * | 2019-10-28 | 2021-05-14 | 沪东重机有限公司 | A diesel engine test cooling system and its multiple hot water pump linkage control device |
-
2021
- 2021-07-01 CN CN202110750233.3A patent/CN113433978A/en active Pending
Patent Citations (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4880535A (en) * | 1989-02-21 | 1989-11-14 | Burrows Bruce D | Water supply station with multiple water storage reservoirs |
| JPH04167109A (en) * | 1990-10-31 | 1992-06-15 | Meidensha Corp | Water supply controller for plural distributing reservoirs |
| US20100300548A1 (en) * | 2009-06-01 | 2010-12-02 | Deverse Richard | Automated system for monitoring and maintenance of fluid level in swimming pools and other contained bodies of water |
| CN102681520A (en) * | 2012-06-04 | 2012-09-19 | 上海迪吉特控制系统有限公司 | Implementation method of operation interface of automatic plant start-up &and shut-down system |
| CN103809567A (en) * | 2014-02-19 | 2014-05-21 | 中国能源建设集团广东省电力设计研究院 | Field bus-based power plant integrated monitoring system |
| CN104775857A (en) * | 2015-04-15 | 2015-07-15 | 钱诚 | High-pressure cylinder rapid starting system for thermal power generation unit set |
| US20190144770A1 (en) * | 2016-06-13 | 2019-05-16 | Mitsubishi Hitachi Power Systems, Ltd. | Slag discharge system, gasifier provided with same, and method for operating slag discharge system |
| CN106120954A (en) * | 2016-08-17 | 2016-11-16 | 河南华润电力首阳山有限公司 | Thermal power plant's water circulation system |
| CN106506080A (en) * | 2016-10-10 | 2017-03-15 | 中广核工程有限公司 | A kind of field bus system and method based on nuclear power station water supply system |
| CN208685712U (en) * | 2018-07-09 | 2019-04-02 | 五华县自来水总公司 | A kind of water supply centralized control system based on degree and zoning |
| CN110005017A (en) * | 2019-05-13 | 2019-07-12 | 丹东川宇消防工程有限公司 | Totally-enclosed current stabilization laminates accumulation of energy water work |
| CN110632904A (en) * | 2019-09-18 | 2019-12-31 | 内蒙古祺迪科技有限公司 | Control method of automatic water supply system |
| CN112796983A (en) * | 2019-10-28 | 2021-05-14 | 沪东重机有限公司 | A diesel engine test cooling system and its multiple hot water pump linkage control device |
| CN110764481A (en) * | 2019-11-10 | 2020-02-07 | 许刚 | Distributed redundant constant-pressure water supply control system |
| CN110921962A (en) * | 2019-12-27 | 2020-03-27 | 西安热工研究院有限公司 | Anti-scaling system and method for wet slag removal system of thermal power plant |
| CN111411660A (en) * | 2020-04-29 | 2020-07-14 | 中国电建集团华东勘测设计研究院有限公司 | Technical water supply system of large-scale unit |
| CN212431456U (en) * | 2020-05-29 | 2021-01-29 | 大唐清苑热电有限公司 | Open cooling water system of high-backpressure circulating water heat supply unit |
Non-Patent Citations (1)
| Title |
|---|
| 文锋: "火电厂供水微机监控系统的研制", 《电力系统及其自动化学报》 * |
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