CN113848844B - Intelligent scheduling system for intelligent power plant self-start-stop function construction - Google Patents
Intelligent scheduling system for intelligent power plant self-start-stop function construction Download PDFInfo
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- G05B19/00—Programme-control systems
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- G05B19/41865—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS], computer integrated manufacturing [CIM] characterised by job scheduling, process planning, material flow
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Abstract
The invention relates to an intelligent scheduling system for the construction of an automatic start-stop function of an intelligent power plant, which cancels the breakpoint design of a conventional APS (active power system) of the power plant, brings a unit-level control function into an ICS (integrated control system) platform and develops the APS intelligent scheduling system based on the ICS platform; the APS intelligent scheduling system divides a unit starting process into a plurality of function (sub) groups, an ICS platform database stores state parameter information needed in each function (sub) group system, the APS intelligent scheduling system acquires the state information of each function (sub) group from the platform database, the system performs logic and algorithm operation, each function group starting instruction and fault early warning information are pushed, the data information is returned to the DCS system through interface communication to perform instruction execution, the scheduling of the unit intelligent self-starting and stopping functions is realized, the breakpoint intervention of artificial characteristics is greatly reduced, the unit starting time is shortened, the starting step optimality is better, and the APS intelligent scheduling system is adaptive and suitable for the construction of an intelligent power plant.
Description
Technical Field
The patent relates to the technical field of intelligent automatic start-stop (APS) control of a thermal power plant, in particular to an intelligent scheduling system application for intelligent power plant automatic start-stop function construction, and is mainly used for intelligent power plant construction.
Background
Automatic start stop system (APS): the APS is a highly automated control system of a unit of a power station, is a unit starting management system established on a unit analog control system (MCS), a steam turbine electro-hydraulic regulation system (DEH), a boiler combustion management system (FSSS), a boiler, a steam turbine, a corresponding auxiliary machine Sequence Control System (SCS), an electric quantity sequence control system (ECS) and other systems based on the idea of automatic starting and stopping control of the whole unit of the unit, and is a unit starting and stopping scheduling, information management and instruction control center. And the APS sends out start-stop instructions of each system, subsystem and equipment according to the unit start-stop curve and a specified program, so that the unit is automatically started and stopped.
Intelligent integrated platform: a three-layer network structure formed by a traditional Distributed Control System (DCS), a plant-level monitoring information system (SIS) and a Management Information System (MIS) in a thermal power plant is developed into a two-layer network structure formed by an intelligent power generation operation control system (ICS) and an intelligent power generation public service system (ISS), and the unification of safety and reliability is realized. By building an intelligent control environment, an intelligent computing environment, a data analysis environment and an open application development environment, the functions of intelligent detection, intelligent control, intelligent operation, intelligent monitoring and the like are realized. Intelligent power generation operation control system (ICS): the ICS platform is a new generation intelligent control platform based on a power generation bottom layer operation control system, so as to improve the core competitiveness of long-period safe, stable, efficient and economic operation of a power generation unit, and the new function characteristics of the ICS platform comprise high platformization and integration of bottom layer hardware and software, and organic integration of data, algorithm and calculation power, so that the ICS platform provides a platform for realizing development and application of various new functions, new technologies and new products.
APS function construction in the construction of an intelligent power plant is an essential part and represents the automation level of the unit starting/stopping process.
A traditional unit automatic start-stop system (APS) is designed in a DCS, a breakpoint design concept is adopted, and the unit start process is divided into 5-8 breakpoints. In general, the method comprises: the auxiliary system starting breakpoint, the boiler pre-ignition preparation breakpoint, the boiler ignition and temperature rise and pressure rise breakpoint, the turbine run-on breakpoint and the unit grid connection and load rise breakpoint are called breakpoint control stages. Each breakpoint will include some group of functions, referred to as a group control level. The partial functional group may also include some sub-functional groups, called functional sub-group control stages. After one breakpoint control level is finished, specific intervention is needed manually, and then the next breakpoint control level can be carried out, so that the system is not a real self-starting and self-stopping system, and the traditional self-starting system is still very deficient in system fault early warning, and is difficult to meet the control requirement of the intelligent power plant.
Along with the development of intelligent power plant construction, the construction of an intelligent integrated platform and an Intelligent Control System (ICS) are developed into a larger, more convenient and more efficient control platform, the conventional APS unit level control cannot meet the requirements of intelligent control, cannot reflect the advantages of the optimal unit starting step under the application trend of a big data technology, and cannot have the processing capacity after intelligent early warning in the unit starting process.
Therefore, improvement and innovation thereof are imperative.
Disclosure of Invention
Aiming at the situation and overcoming the defects of the prior art, the invention aims to provide an intelligent scheduling system for the construction of the automatic start-up and shut-down function of the intelligent power plant, cancel the breakpoint setting of the automatic start-up and shut-down function, break through the conventional design of the automatic start-up and shut-down function, push the start-up step sequence according to different start-up modes and running states of a unit, and flexibly schedule each function group to execute; meanwhile, the parameter change of the system is monitored in a full period and early warning information is pushed in the process of executing the bottom layer function group.
The technical scheme of the invention is as follows:
an intelligent scheduling system for the construction of an automatic start-stop function of an intelligent power plant cancels the breakpoint design of a conventional APS system of the power plant, brings a unit-level control function into an ICS platform, and develops the APS intelligent scheduling system based on the ICS platform;
the APS intelligent scheduling system divides a unit starting process into a plurality of function (sub) groups, an ICS platform database stores state parameter information required in each function (sub) group system, the APS intelligent scheduling system acquires the state information of each function (sub) group from the platform database at regular time through HTTP interface communication, the system realizes calling of a data logic calculation module through an algorithm plug-in interface, logic and algorithm operation are carried out, starting instructions and fault early warning information of each function group are pushed, and finally the data information is returned to a DCS system through interface communication to carry out instruction execution, so that the scheduling of the intelligent self-starting and stopping functions of the unit is realized;
the logical sum algorithm operation specifically comprises:
determining the starting mode (such as cold-state starting, warm-state starting, hot-state starting and extreme hot-state starting) of the unit, thereby determining the completion conditions and the operation parameters of each functional group of the unit in the starting mode;
the APS intelligent scheduling system sequentially pushes starting instructions to all the function groups, the starting is finished until the last function group finishing condition is met, the automatic starting of the unit is finished, otherwise, the automatic starting is executed in a circulating mode, the starting process and the running state of all the function groups are monitored in real time in the detection process, and the pushing starting instructions or fault early warning information is sent out when the finishing condition is not met or the parameters are abnormal.
Preferably, the multiple function groups, which are obtained by dividing the unit starting process by the APS intelligent scheduling system, include: the system comprises a circulating water system function group, an open water system function group, a closed water system function group, a condensed water system function group, an auxiliary oil system function group, an air preheater and furnace side oil system function group, a chilled water system function group, a barring function group, an auxiliary steam system function group, a pre-pump system function group, a deaerator system function group, a shaft seal system function group, a vacuum system function group, a steam pump system function group, a boiler water supply system function group, a wind fume system function group, a dry slag removal system function group, a denitration system function group, desulfurization, dust removal, ash removal system function group, a furnace purging system function group, an oil system circulation system function group, a primary wind sealing air system function group, a micro-oil system function group, an ignition oil system function group, a powder preparation system function group, a thermal state flushing system function group, a whole-course bypass system function group, an intelligent temperature and pressure increasing system function group, a host machine ATC system function group, a steam extraction system function group and a synchronization grid connection function group.
The distinction of the associated and non-associated functional groups is common knowledge of those skilled in the art, for example, if the circulating water system functional group and the condensed water system functional group, the auxiliary oil system functional group and the fixed water system functional group belong to non-associated systems, if the allowable starting condition is met, the corresponding starting instruction is pushed, and the instruction pushing is not in sequence; if the function group of the circulating water system and the function group of the open water system have correlation, the starting condition of the open water system comprises the normal operation of the circulating water system; the closed water system function group and the auxiliary oil system function group have correlation, after the closed water system operates normally, the push of the auxiliary oil system function group instruction is allowed, and the push of the auxiliary oil system function group instruction has constraint; namely, the system function group with relevance meets the requirements according to the 'preorder', and then executes the system function group; the principle of 'principle action of loss of the preamble and judgment of the subsequent sequence' is adopted, a non-relevant system function group is provided, the scheduling instruction can be timely pushed as long as the starting condition is met, and the fault early warning information is pushed in real time in the starting process.
In the detection of the subsystems of each function group, according to the above principle, the subsystems of the function groups, for example, the auxiliary oil system includes a main engine lubricating oil function group and a small engine lubricating oil function group, which belong to unrelated systems, and if the allowable starting condition is met, the corresponding starting instruction is pushed, and the instruction pushing is not in sequence, which is not illustrated here.
Preferably, when the APS intelligent scheduling system sequentially pushes the start instruction to each function group, the principle of the pushing sequence is as follows: the non-related function groups can simultaneously push the starting scheduling instructions as long as the starting conditions are met; the related function groups start scheduling instructions in sequence according to the conventional process sequence of the power plant; according to the starting principle, the automatic starting of the unit is finished until the finishing condition of the last function group is met, and otherwise, the automatic starting is executed circularly.
According to the requirements of the intelligent power plant construction direction, the APS intelligent scheduling system with the characteristics of intelligent scheduling and intelligent operation is developed by means of the multisource heterogeneous ICS control platform. This intelligent scheduling system includes: the top layer is comprehensively integrated with other high-level application modules of intelligent power plants such as intelligent inspection and intelligent early warning, and multi-thread information interaction is carried out; the middle layer develops a functional group with 'full-period automatic control' and 'closed-loop control'; the bottom layer interconnection controls subsystems such as MCS, DEH, SCS, ECS and the like, and an intelligent APS operation system with full information interaction, fault self-decision and full flexible scheduling is fully formed. The intelligent APS can automatically optimize the starting step sequence and automatically operate the function group in the whole process. Compared with a DCS (distributed control system), the ICS (Internet connection sharing) platform has larger data storage, provides a more convenient optimization platform, and is combined with the updating requirement of the self-starting and stopping function to develop the APS intelligent scheduling system, and compared with the prior art, the system disclosed by the invention has the following advantages:
(1) The APS intelligent scheduling system abandons the breakpoint design concept of the traditional APS, incorporates the unit-level control functions into an ICS platform, develops the APS intelligent scheduling system based on the ICS intelligent control platform, pushes the starting instructions and the fault early warning information of each functional group, and carries out startup step intelligent pushing according to the multi-parameter state judgment of the system, thereby greatly reducing breakpoint intervention with artificial characteristics;
(2) The APS intelligent scheduling system realizes the intercommunication of the ICS platform and the DCS system demand data by means of the large data storage advantage of the ICS platform, the overall design of each functional group is realized in the existing DCS configuration, the parameter information of the system is monitored in the APS intelligent automatic start-stop process, the multi-parameter is integrated and analyzed, the fault information is pushed in time, and the operation judgment is guided or necessary intervention is carried out;
(3) The APS intelligent dispatching system pushes the whole starting instruction of each function group of the APS, provides the optimal starting flow guidance of the equipment, has more efficient and more intelligent starting and stopping step order pushing, greatly shortens the starting time of a unit, adopts the sequential control design in the traditional APS function design, can push the dispatching instruction after meeting the starting condition for the unrelated function groups according to the parameter state condition of each function group, and has more starting step order optimality compared with the traditional breakpoint level control.
Drawings
Fig. 1 is a communication flow chart of the APS intelligent scheduling system of the present invention.
Fig. 2 is a schematic diagram of the design of the APS intelligent scheduling system of the present invention, which is an embodiment of sequentially pushing start commands in sequence.
Fig. 3 is a flow chart of the detection of the functional group of the circulating water system of the present invention.
FIG. 4 is a flow chart of the detection of the functional group of the open water system of the present invention.
Fig. 5 is a block diagram of the structural design of the APS intelligent scheduling system of the present invention.
Detailed Description
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
As shown in fig. 1 and 5, the APS intelligent scheduling system is designed on an intelligent control platform (ICS) in intelligent power plant construction, and realizes scheduling of an intelligent automatic start-stop function of a unit.
The software development environment of the ICS platform where the APS intelligent scheduling system is developed can be as follows:
developing a system: windows10 system
Developing software: python3.8.1
And (3) developing a language: CPython
The calling of a data logic calculation module is realized through an algorithm plug-in interface, the online editing of data calculation logic is realized through a dynamic scripting language CPython, and a user can modify the logic automatically to realize the logic modification. The main algorithms implemented are:
(1) The data preprocessing algorithm mainly comprises the following steps: checking the state of a switch, filtering the frequently fluctuated regulated quantity, detecting the quality signal of the measured point of the regulated quantity and the like;
(2) Function (sub) group running state query;
(3) Selecting a functional (sub) group with starting conditions;
(4) Monitoring fault information of functional (sub) groups;
(5) Pushing a scheduling instruction;
the ICS platform database stores state parameter information required in each function (sub) group system, the APS intelligent scheduling system acquires the state information of each function (sub) group from the platform database at regular time through HTTP interface communication, the system realizes the calling of a data logic calculation module through an algorithm plug-in interface, performs logic and algorithm operation, pushes starting instructions and fault early warning information of each function group, and finally returns the data information to the DCS system through interface communication for instruction execution, thereby realizing the scheduling of the intelligent self-starting and stopping functions of the unit;
the APS intelligent scheduling system needs the relevant data collected on the ICS platform, and the number of the determined functional groups is slightly different according to the different conditions of each power plant, and the data acquisition principle is as follows: counting the number of each system function group according to a unit starting step sequence, collecting the completion conditions and the operation parameters of each function group at the bottom layer, and strengthening the representation processing of data in a DCS; and listing the correlation with other function groups, pushing a function group starting instruction and a fault early warning pushing instruction and designing an action instruction of the related function group after the fault aiming at each function group.
As shown in fig. 2, a schematic diagram of a design of an embodiment of sequentially pushing start instructions by an APS intelligent dispatching system of the present invention includes 31 function groups, which are a circulating water system function group, an open water system function group, a closed water system function group, a condensed water system function group, an auxiliary oil system function group, an air preheater and boiler-side oil system function group, a chilled water system function group, a barring function group, an auxiliary steam system function group, a pre-pump system function group, a deaerator system function group, a shaft seal system function group, a vacuum system function group, a steam pump system function group, a boiler water supply system function group, a wind and smoke system function group, a dry slag removal system function group, a denitration system function group, desulfurization, dust removal, ash removal system function group, a furnace purging system function group, an oil system function group, a primary wind seal air system function group, a micro-oil system function group, an ignition oil system function group, a powder system function group, a hot state flushing system function group, a whole course bypass system function group, an intelligent boosting system function group, an ATC system function group, a steam extraction system function group, a closed water system function group, a synchronization function group, and other synchronization function group, and a synchronization period synchronization function group, and other synchronization function group are omitted from the APS intelligent dispatching system function group;
the conditions for completion, alarms, interrupts, pauses, and operational parameter control for the 31 functional groups can be designed according to the following table:
the specific number of the functional groups, the finishing condition, the alarm, the pause and interruption condition and the design of the fixed value of the operation parameter can be correspondingly adjusted according to the installation condition of the machine set and the actual field equipment condition, the adjustment is clear to the technicians in the field, and the technical effect of the method is not influenced after the adjustment.
Under the normal condition of the APS intelligent dispatching system, the APS intelligent dispatching system is in an exit state, the APS intelligent dispatching system is not activated, a DCS platform is provided with an on-off button, and after the APS intelligent dispatching system is put into operation, the program operation of the dispatching system is started and an instruction is pushed; and immediately terminating the pushing of all the instructions after the APS intelligent dispatching system exits.
When the APS intelligent scheduling system program is executed, firstly, the starting mode of the unit is judged. Selecting a corresponding starting mode according to the starting judgment conditions of the unit, wherein the starting conditions of corresponding function groups of the unit are different in different starting modes if the unit is started in a cold state, a warm state, a hot state or an extremely hot state;
when the APS startup system is executed, an optimal startup instruction is sent according to the APS input state, the startup mode of the unit and the function group completion condition, and circular detection is carried out.
Starting the unit starting process from the circulating water system function group to the synchronous grid-connected function group, and dividing into 31 function groups. According to the conventional process flow of the power plant, starting detection from the completion condition of the circulating water system function group until the completion condition of the synchronous grid-connected function group is met, and otherwise, executing circularly. For each function group, there is a specific function group instruction push and fault information push.
When a specific condition occurs to a step sequence executed by a program, the program triggers an 'interrupt' instruction, after the interrupt instruction is sent out, the step sequence being executed is immediately suspended, an alarm is given through first sending, the step sequence of the interrupt condition is recorded at the same time, pushing and starting are automatically started again from the step sequence after recovery, for example, circulating water normally runs, the program executes an open water functional group, at the moment, if the circulating water system is abnormal, the program triggers the interrupt instruction, namely the instruction pushing of the current open water is immediately stopped, circulating water fault information is pushed, and the instruction pushing of the functional group of the circulating water system is automatically skipped back.
When a specific condition appears in a step sequence in program execution, a program triggers a 'pause instruction', after the instruction is sent out, an intelligent scheduling control system pushes a command to pause, the execution of specific constraint time is paused according to different conditions, and after the constraint time is finished, if the condition does not disappear, an 'interrupt' command is triggered. And (4) continuing the program after the suspension condition is met or the suspension condition is manually confirmed to be met, for example, in the execution process, manually suspending the operator, keeping the program suspended, and automatically continuing the execution after the recovery.
General faults and early warning do not affect the execution of a scheduling system, only alarm is triggered, the execution of a program is not interrupted, and operating personnel are reminded of paying attention to and checking the system.
When the system detects that a certain function group is not operated, starting to push a starting instruction of the function group. And the instruction is pushed to the DCS system to execute the function group, the intelligent scheduling system detects relevant parameters of the system in real time in the starting process of the function group system, and if the relevant parameters have abnormal conditions such as failure or line crossing, the fault information is pushed.
As shown in fig. 3, a flow chart of the detection of the circulating water system function group of the present invention is shown, taking the circulating water system function group as an example: if the completion condition (normal operation) of the circulating water system is not met, firstly judging whether the circulating water pump is in an operating state, otherwise, pushing a starting instruction of a circulating water function group; if the circulating water pump is in an operating state, judging whether the current of the circulating water pump is normal, otherwise, pushing a fault prompt of 'abnormal current of the circulating water pump and requesting to increase the running of the circulating water pump'; if the running circulating pump current is normal, judging whether the pressure of the circulating jellyfish pipe fluctuates by 0.5MPa within 10s, otherwise pushing a fault prompt of 'abnormal circulating pump output and requesting to increase the running of the circulating pump'; if the opening of the outlet butterfly valve of the circulating water pump is normal, judging whether the opening of the outlet butterfly valve of the circulating water pump is at a full-open position (100%), otherwise pushing 'the outlet butterfly valve of the circulating water pump is not at the full-open position', and please check 'fault information'. And executing the next function group until the completion condition of the circulating water system is met.
As shown in fig. 4, which is a flow chart of the detection of the functional group of the open water system of the present invention, if the completion condition (normal operation) of the open water system is not satisfied, it is first determined whether the circulating water system is in an operating state, if the circulating water is normally operated, it is determined whether the pressure of the open jellyfish pipe is normal, otherwise, an open water functional group start instruction is pushed, and the next functional group is executed until the completion condition of the open water system is satisfied.
And sequentially judging the subsequent closed water function groups until the completion conditions (normal operation) of the synchronous grid-connected function group, if not, carrying out instruction pushing or fault information judgment on the corresponding function groups until all the function groups are started, and finishing grid-connected starting of the unit.
The situation clearly shows that the method develops an APS intelligent scheduling system with the characteristics of intelligent scheduling and intelligent operation by means of a multi-source heterogeneous ICS control platform, abandons the breakpoint design concept of the traditional APS, brings unit-level control functions into the ICS platform, pushes starting instructions and fault early warning information of each functional group, and carries out intelligent pushing of start-up step sequences according to multi-parameter state judgment of the system, thereby greatly reducing breakpoint intervention with artificial characteristics; the method has the advantages that the intercommunication of the ICS platform and the DCS system demand data is realized by means of the large data storage advantage of the ICS platform, the overall design of each functional group is realized in the existing DCS configuration, the multiple parameters are integrated and analyzed, the fault information is timely pushed, the operation judgment is guided or necessary intervention is carried out, and the method is suitable for the construction of the intelligent power plant; the flow guidance for optimal starting of the equipment is provided, more efficient and more intelligent starting and stopping step pushing is achieved, starting time of the unit is greatly shortened, and starting step optimality is achieved.
Claims (2)
1. An intelligent scheduling system for intelligent power plant self-start-stop function construction is characterized in that a breakpoint design of a conventional APS (active Power System) of a power plant is cancelled, a unit-level control function is incorporated into an ICS (Internet connection sharing) platform, and the APS intelligent scheduling system based on the ICS platform is developed;
the APS intelligent scheduling system divides the unit starting process into a plurality of function groups, an ICS platform database stores state parameter information required in each function group system, the APS intelligent scheduling system acquires the state information of each function group from the platform database at regular time through HTTP interface communication, the system realizes the calling of a data logic calculation module through an algorithm plug-in interface, carries out logic and algorithm operation, pushes starting instructions and fault early warning information of each function group, and finally returns the data information to a DCS system through interface communication for instruction execution, thereby realizing the scheduling of the intelligent automatic start-stop function of the unit;
the logical sum algorithm operation specifically comprises:
determining a starting mode of the unit, thereby determining the completion conditions and the operation parameters of each function group of the unit in the starting mode;
the APS intelligent scheduling system sequentially pushes a starting instruction to each function group until the last function group is finished after the finishing condition is met, the unit is automatically started, otherwise, the circulation execution is carried out, the starting process and the running state of each function group are monitored in real time in the detection process, and the pushing starting instruction or the fault early warning information is sent out if the finishing condition is not met or the parameters are abnormal;
when the APS intelligent scheduling system sequentially pushes starting instructions to each function group, the principle of the pushing sequence is as follows: the non-related function groups can simultaneously push the starting scheduling instructions as long as the starting conditions are met; the related function groups sequentially start scheduling instructions according to the conventional process sequence of the power plant; and according to the starting principle, finishing the automatic starting of the unit until the finishing condition of the last function group is met.
2. The intelligent scheduling system for automatic start-stop function construction of the intelligent power plant according to claim 1, wherein the APS intelligent scheduling system divides a unit starting process into a plurality of function groups, and comprises: the system comprises a circulating water system function group, an open water system function group, a closed water system function group, a condensate system function group, an auxiliary oil system function group, an air preheater and furnace side oil system function group, a fixed water system function group, a jigger function group, an auxiliary steam system function group, a pre-pump system function group, a deaerator system function group, a shaft seal system function group, a vacuum system function group, a steam pump system function group, a boiler water feeding system function group, a wind and smoke system function group, a dry slag removal system function group, a denitration system function group, desulfurization, dust removal, ash removal system function group, a furnace purging system function group, an oil system circulation system function group, a primary wind sealing air system function group, a micro-oil system function group, an ignition oil system function group, a powder making system function group, a thermal state flushing system function group, a whole-course bypass system function group, an intelligent temperature and pressure increasing system function group, a host ATC system function group, a steam extraction system function group and a synchronous grid connection function group.
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