CN113741175A - Method and system for coordinated control of machine and furnace - Google Patents
Method and system for coordinated control of machine and furnace Download PDFInfo
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Abstract
The invention provides a method and a system for coordinating and controlling a machine furnace, wherein the method comprises the following steps: after the generator set triggers the high protection action of the main steam pressure, a target load instruction and a switching value state signal of the high protection action of the main steam pressure are obtained; inputting a target load instruction into a steam turbine master control PID regulator; and inputting the high-pressure protection action switching value state signal of the main steam into a boiler main control PID regulator. The steam turbine main control PID regulator is used for opening the steam turbine steam inlet regulating valve to unload the overpressure main steam for power generation according to a target load instruction after the main steam pressure is triggered by the generator set and is subjected to high protection action, and the phenomenon that the safe and stable operation of the generator set is influenced due to the opening action of the boiler safety door is avoided. Meanwhile, the switching value of the high-pressure protection action is connected into a boiler main control PID regulator, so that the total coal quantity entering the boiler is locked and increased. The high main steam pressure is ensured, the total coal entering the furnace regulated by the coordinated control system is not increased after the protection action, and the further deterioration and rise of the steam pressure are prevented.
Description
Technical Field
The invention relates to the technical field of automatic control of thermal engineering, in particular to a method and a system for coordinately controlling a machine furnace.
Background
In order to meet the requirement of a power grid and respond to load lifting more quickly, a coal-fired power generating set usually adopts a boiler-following-based boiler coordination control mode (CCS for short), namely a steam turbine main control PID regulator takes the power generation load of the set as a regulated quantity, and a boiler main control PID regulator takes the front main steam pressure as a regulated quantity. The steam turbine regulating valve is opened to increase the generating load of the unit quickly and cause the main steam pressure to be reduced, the steam turbine regulating valve is closed to reduce the generating load quickly and cause the main steam pressure to be increased, the boiler achieves the energy demand balance process of the unit through increasing and decreasing the coal supply quantity and has large inertia and delay, especially under the condition that a plurality of current generator sets are mixed with coal, the fluctuation of coal quality entering the boiler is large, the abnormal working condition that the main steam pressure is too high is difficult to avoid in the actual generating operation, the boiler safety door is opened to cause the operation, the sub-critical unit steam drum water level high protection tripping boiler and the main steam temperature quick reduction protection tripping boiler of the direct current unit are directly caused, and the generator sets trip and stop operation. Therefore, a coordinated control method for the engine and the furnace is urgently needed to be researched to ensure that the coal-fired power generating unit can normally and stably operate under the abnormal working condition of overhigh main steam pressure.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to overcome the defect that the coal-fired power generating unit in the prior art is difficult to operate normally and stably under the abnormal working condition of overhigh main steam pressure, thereby providing a method and a system for coordinately controlling the machine furnace.
In order to achieve the purpose, the invention provides the following technical scheme:
in a first aspect, an embodiment of the present invention provides a method for coordinating and controlling a machine furnace, including:
after the generator set triggers the high protection action of the main steam pressure, a target load instruction and a switching value state signal of the high protection action of the main steam pressure are obtained;
inputting the target load instruction into a steam turbine main control PID regulator, and regulating the opening of a steam turbine steam inlet regulating valve by the steam turbine main control PID regulator according to the target load instruction to carry out pressure relief;
and inputting the main steam high-protection action switching value state signal into a boiler main control PID regulator, and locking the increase of the total coal entering the boiler by the boiler main control PID regulator according to the main steam high-protection action switching value state signal.
Preferably, the machine furnace coordination control method further comprises:
acquiring the front main steam pressure of a steam turbine;
and judging whether the generator set triggers the high-pressure protection action of the main steam according to the relation between the main steam pressure before the generator set and a preset pressure value.
Preferably, the determining, according to the relationship between the pre-machine main steam pressure and a preset pressure value, whether the generator set triggers a high main steam pressure protection action includes:
when the front main steam pressure is not less than a first preset pressure value, judging that the generator set triggers high protection action of the main steam pressure;
and when the front main steam pressure is smaller than a first preset pressure value, judging that the generator set does not trigger the high protection action of the main steam pressure.
Preferably, the machine furnace coordination control method further comprises:
when the front main steam pressure is changed from being not less than a first preset pressure value to being not more than a second preset pressure value, the main steam pressure of the generator set is reset to be high in protection action, and the first preset pressure value is larger than the second preset pressure value.
Preferably, after the generator set triggers a high protection action of the main steam pressure, acquiring a target load instruction includes:
acquiring a current load instruction, a front main steam pressure of a steam turbine and a maximum load fixed value of the steam turbine;
performing offset operation on the front main steam pressure according to a preset high-pressure protection offset logic;
summing the current load instruction and the front main steam pressure after the offset operation to obtain a first load instruction;
and obtaining a target load instruction by taking a small value of the first load instruction and the maximum load fixed value of the unit.
Preferably, the machine furnace coordination control method further comprises:
and when the generator set does not trigger the high-pressure protection action of the main steam, the generator set operates according to the preset control logic.
In a second aspect, an embodiment of the present invention provides a machine and furnace coordination control system, including:
the acquisition module is used for acquiring a target load instruction and a high-main-steam-pressure high-protection-action switching value state signal after the generator set triggers a high-main-steam-pressure high-protection action;
the steam turbine regulating module is used for inputting the target load instruction into a steam turbine main control PID regulator, and the steam turbine main control PID regulator regulates the opening of a steam turbine steam inlet regulating valve to carry out pressure relief according to the target load instruction;
and the boiler regulating module is used for inputting the main steam pressure high-protection action switching value state signal into a boiler main control PID regulator, and the boiler main control PID regulator locks the increase of the total coal entering the boiler according to the main steam pressure high-protection action switching value state signal.
In a third aspect, an embodiment of the present invention provides a computer-readable storage medium, where computer instructions are stored, and the computer instructions are configured to cause a computer to execute the machine furnace coordination control method according to the first aspect of the embodiment of the present invention.
In a fourth aspect, an embodiment of the present invention provides a computer device, including: the computer-based coordination control method comprises a memory and a processor, wherein the memory and the processor are connected in communication with each other, the memory stores computer instructions, and the processor executes the computer instructions so as to execute the machine-furnace coordination control method according to the first aspect of the embodiment of the invention.
The technical scheme of the invention has the following advantages:
the invention provides a method for coordinately controlling a machine furnace, which comprises the following steps: after the generator set triggers the high protection action of the main steam pressure, a target load instruction and a switching value state signal of the high protection action of the main steam pressure are obtained; inputting a target load instruction into a steam turbine main control PID regulator, and regulating the opening of a steam turbine steam inlet regulating valve by the steam turbine main control PID regulator according to the target load instruction to release pressure; and inputting the high-protection-action switching value state signal of the main steam pressure into a boiler main control PID regulator, and locking the increase of the total coal entering the boiler by the boiler main control PID regulator according to the high-protection-action switching value state signal of the main steam pressure. In the case of a turbine-boiler coordinated control mode, if the pressure is high and the protection action is performed, the turbine main control PID regulator automatically opens the steam inlet regulating valve of the steam turbine to unload the overpressure main steam for power generation and apply work according to a target load instruction after the main steam pressure is high and the protection action is triggered by the generator set, so that the phenomenon that the safe and stable operation of the generator set is influenced by the opening action of the boiler safety door is avoided. Meanwhile, the switching value of the high-pressure protection action is connected to a BI (business intelligence) pin parameter forbidden to be increased of a boiler master control PID (proportion integration differentiation) regulator, so that the total coal quantity entering the boiler is increased. The high main steam pressure is ensured, the total coal entering the furnace regulated by the coordinated control system is not increased after the protection action, and the further deterioration and rise of the steam pressure are prevented.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a flowchart illustrating a specific example of a method for coordinating and controlling a furnace according to an embodiment of the present invention;
FIG. 2 is a logic diagram of a furnace master PID regulator in accordance with an embodiment of the invention;
FIG. 3 is a logic diagram for determining a high pressure protection state according to an embodiment of the present invention;
FIG. 4 is a schematic block diagram of a specific example of a coordinated control system of a furnace according to an embodiment of the invention;
fig. 5 is a block diagram of a specific example of a computer device according to an embodiment of the present invention.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; the two elements may be directly connected or indirectly connected through an intermediate medium, or may be communicated with each other inside the two elements, or may be wirelessly connected or wired connected. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
The embodiment of the invention provides a coordinated control method for a machine furnace, which is realized in a DCS (distributed control system) coordinated automatic control logic of a generator set. As shown in fig. 1, the method for coordinating and controlling the machine furnace comprises the following steps:
step S10: and after the generator set triggers the high-protection action of the main steam pressure, acquiring a target load instruction and a high-protection action switching value state signal of the main steam pressure.
In a specific embodiment, whether the generator set is in a turbine-boiler coordination control mode or not is judged, and whether the quality of a main steam pressure (namely, the pressure before the turbine) measuring point in front of a regulating valve of a steam turbine is good or not is judged. And the boiler coordination control mode is optimized on the premise that the generator set is in the boiler coordination control mode and the quality of the pressure measuring point in front of the boiler is good, so that the phenomenon that the boiler safety door is opened to stop operation due to high main steam pressure of the generator set is avoided. Therefore, in order to achieve the aim, firstly, a target load instruction and a main steam pressure high protection action switching value state signal after the generator set triggers the main steam pressure high protection action are obtained, and a series of logic operations are carried out according to the target load instruction and the main steam pressure high protection action switching value state signal after the generator set triggers the main steam pressure high protection action, so that the generator set can normally and stably operate under the abnormal working condition that the main steam pressure is too high.
Step S20: and inputting the target load instruction into a steam turbine main control PID regulator, and regulating the opening of a steam turbine steam inlet regulating valve by the steam turbine main control PID regulator according to the target load instruction to release pressure.
In a specific embodiment, as shown in fig. 2, the target load command is inputted into the turbine main control PID regulator as a set value SP of the turbine main control PID regulator. And meanwhile, the generating load of the unit is collected in real time to be used as the measured value PV of the main control PID regulator of the steam turbine. And the main control PID regulator of the steam turbine performs feedback regulation on the regulating valve of the steam turbine according to the set value SP and the measured value PV so as to unload the main steam with overhigh pressure. Finally, the overpressure main steam is unloaded through opening the steam inlet regulating valve of the large steam turbine to generate power so as to achieve the purpose of quickly unloading the steam to do work, effectively avoid the opening action of a boiler safety door and reduce the trip and shutdown probability of the unit. By the coordination control method of the engine and the furnace with the high-pressure protection function, the steam inlet regulating valve of the steam turbine is automatically opened to unload the overpressure main steam for power generation, so that pressure can be quickly relieved in advance to avoid opening a boiler safety door, and the power generation load of the engine set can be increased. The unnecessary opening action of boiler emergency exit can be avoided rationally effectively, economic, safe and the steady operation of reinforcing generating set.
Step S30: and inputting the high-protection-action switching value state signal of the main steam pressure into a boiler main control PID regulator, and locking the increase of the total coal entering the boiler by the boiler main control PID regulator according to the high-protection-action switching value state signal of the main steam pressure.
In an embodiment, as shown in fig. 2, the configuration of the switching value state signal PresH of the main steam pressure high protection operation is connected to the BI pin parameter prohibited from increasing of the boiler main control PID regulator, so as to ensure that the total coal amount entering the boiler is not increased and the boiler combustion rate is not increased when the main steam pressure high protection operation is performed in the boiler-boiler coordination control mode, thereby avoiding the repeated deterioration and increase of the main steam pressure. When the main steam pressure is high in protection action, the steam pressure before the steam turbine is reduced along with the opening of the steam inlet regulating valve of the steam turbine, if the main control PID regulator of the boiler does not inhibit the increase of optimization processing, the output instruction of the main control PID regulator of the boiler is directly increased due to the reduction of the PV value of the pressure before the steam turbine, and the increase of the coal quantity further aggravates the deterioration and the increase of the main steam pressure. By connecting the DI state signal of the main steam pressure high protection action into the BI pin parameter forbidden to be increased of the boiler main control PID regulator, the total coal quantity entering the boiler is not increased and the boiler combustion rate is not enhanced when the main steam pressure high protection action is carried out in a boiler coordination control mode, and repeated deterioration and increase of the main steam pressure are avoided. The problem of abnormal automatic increase of the amount of coal entering the boiler in the pressure relief process of the steam turbine is solved in an optimized mode.
The invention provides a method for coordinately controlling a machine furnace, which comprises the following steps: after the generator set triggers the high protection action of the main steam pressure, a target load instruction and a switching value state signal of the high protection action of the main steam pressure are obtained; inputting a target load instruction into a steam turbine main control PID regulator, and regulating the opening of a steam turbine steam inlet regulating valve by the steam turbine main control PID regulator according to the target load instruction to release pressure; and inputting the high-protection-action switching value state signal of the main steam pressure into a boiler main control PID regulator, and locking the increase of the total coal entering the boiler by the boiler main control PID regulator according to the high-protection-action switching value state signal of the main steam pressure. In the case of a turbine-boiler coordinated control mode, if the pressure is high and the protection action is performed, the turbine main control PID regulator automatically opens the steam inlet regulating valve of the steam turbine to unload the overpressure main steam for power generation and apply work according to a target load instruction after the main steam pressure is high and the protection action is triggered by the generator set, so that the phenomenon that the safe and stable operation of the generator set is influenced by the opening action of the boiler safety door is avoided. Meanwhile, the switching value of the high-pressure protection action is connected to a BI (business intelligence) pin parameter forbidden to be increased of a boiler master control PID (proportion integration differentiation) regulator, so that the total coal quantity entering the boiler is increased. The high main steam pressure is ensured, the total coal entering the furnace regulated by the coordinated control system is not increased after the protection action, and the further deterioration and rise of the steam pressure are prevented.
In an embodiment, the method for coordinating and controlling the boiler further includes the following steps:
step S01: and acquiring the front main steam pressure of the steam turbine.
Step S02: and judging whether the generator set triggers the high-pressure protection action of the main steam according to the relation between the main steam pressure in front of the generator and the preset pressure value.
In a specific embodiment, the method for judging whether the generator set triggers the high-main-steam-pressure protection action or not according to the relation between the main-steam-pressure before the generator set and the preset pressure value comprises the following steps:
step S021: when the front main steam pressure is not less than a first preset pressure value, it is determined that the generator set triggers the high main steam pressure protection action.
Step S022: and when the front main steam pressure is smaller than a first preset pressure value, judging that the generator set does not trigger the high protection action of the main steam pressure.
Step S023: when the front main steam pressure is changed from being not less than the first preset pressure value to being not more than the second preset pressure value, the main steam pressure of the reset generator set is high in protection action, and the first preset pressure value is larger than the second preset pressure value.
In the embodiment of the invention, on the premise of a furnace coordination control mode and good quality of a front pressure measuring point (reliable main steam pressure measuring point), if the front main steam pressure is not less than a first preset pressure value Cnt1 (namely, a pressure high fixed value), the output state of the RS trigger is '1', the main steam pressure of the unit is in a high protection action memory state, and when the front pressure falls below a second preset pressure value Cnt2 (namely, the pressure high fall fixed value), the output state of the RS trigger is '0', and the high protection action of the coordination control system is finished. The judgment logic optimizes the use of the high-limit state memory and the low-limit reset of the pressure in front of the machine, and can reasonably and effectively avoid frequent cross actions of the main steam with high pressure and protection functions of the coordinated control system.
In one embodiment, after the generator set triggers the high protection action of the main steam pressure, a target load instruction is obtained, which includes the following steps:
step S101: and acquiring a current load instruction, the front main steam pressure of the steam turbine and the maximum load fixed value of the turbine.
Step S102: and carrying out offset operation on the front main steam pressure according to the preset high-pressure protection offset logic.
Step S103: and summing the current load instruction and the pre-machine main steam pressure after the offset operation to obtain a first load instruction.
Step S104: and taking a small value from the first load instruction and the maximum load fixed value of the unit to obtain a target load instruction.
In a specific embodiment, if the pressure high protection action switching value PresH state is "1" during the high protection action of the coordinated control system, the analog output selector Sel selects the "Y" port as the output value, i.e. the load instruction is superimposed with the load offset value corresponding to the operation of the front main steam pressure through fx broken line function; if the high pressure protection of the coordinated control system is not activated and the state of the pressure high protection activation switching value PresH is '0', the analog quantity output selector Sel selects an 'N' port as an output value, namely a load instruction of the conventional coordinated control system. Further, for the safety of the unit, the output value of the analog quantity output selector Sel and the maximum load constant Cnt3 of the unit are subjected to small value calculation and then are accessed to the set value SP pin parameter of the steam turbine main control PID regulator, so that the generating load of the unit is not greater than the maximum allowable output of the unit. The fx broken line function can be used for opening the steam inlet regulating valve of the large steam turbine in a segmented and different degree mode according to the main steam pressure in front of the steam turbine so as to achieve the purpose of quickly unloading steam to do work, effectively avoid the opening action of a boiler safety door and reduce the trip and outage probability of the unit.
By adopting the control method, the operation intensity of operators is reduced, and the automation level of the unit is improved. The coordination control method automatically performs machine-furnace cooperation treatment in DCS thermal control logic, and does not need manual intervention of operators in the whole process.
In one embodiment, the coordination control system is put into practical operation, and the high constant value of the main steam pressure, the high fallback constant value of the main steam pressure, the maximum load constant value of the unit and the power generation load broken line function parameter value corresponding to the unloading steam pressure of the steam turbine are optimized and set on line by combining the combustion characteristics of the boiler and the load adjustment capacity of the steam turbine.
The main steam pressure high protection fixed value must refer to the boiler safety door opening action fixed value, so that the high pressure protection function under a coordination control mode is ensured before the boiler safety door acts, and the main steam pressure high fall-back fixed value needs to be slightly higher than the set rated steam pressure value. The power generation load broken line function corresponding to the front main steam pressure superposed in the set value SP of the steam turbine main control PID regulator is inserted into a multi-section broken line with gradually changing slope, but the SP finally connected into the steam turbine main control PID regulator is not larger than the maximum power generation load value of the unit.
The following takes a "machine furnace coordination control method with high pressure protection function" of a 300MW subcritical unit of a certain power plant as an example, and introduces implementation steps and parameter setting results of the coordination control method. The boiler of the factory adopts an HG-1025/17.5-HM 35 type subcritical and natural circulation once-intermediate reheating drum boiler produced by Harbin boiler Co., Ltd, the fixed value of the opening action of a boiler safety door is 18.12MPa, the steam turbine adopts a CCZ 300-16.7/537/537 subcritical, uniaxial, double-cylinder double-exhaust and double-extraction heat-supply condensing steam turbine produced by Harbin steam turbine Co., Ltd, and the DCS adopts an EDPF-NT control system of Beijing national electrical intelligent deep control technology Co., Ltd. The coordinated control logic with the pressure high protection function is optimally designed and configured in the DCS according to the figure 2 and the figure 3, and the specific implementation steps are as follows:
the first step is as follows: optimally designing a main steam high-pressure protection action control logic;
the second step is that: selecting a high-pressure-superposition protection offset value from a set value SP of a main control PID regulator of the steam turbine;
the third step: accessing the PresH configuration of the main steam pressure high protection action state signal into a BI (BI-level information) pin parameter forbidden to be increased of a boiler master control PID (proportion integration differentiation) regulator;
the fourth step: and (3) optimizing and setting a high constant value of the main steam pressure, a high fallback constant value of the main steam pressure, a maximum load constant value of the unit and a power generation load broken line function parameter value corresponding to the unloading steam pressure of the steam turbine on line along with the fact that the coordinated control system is put into practical operation and in combination with the combustion characteristics of the boiler and the load adjustment capacity of the steam turbine.
According to the fixed value of the opening action of the boiler safety door of 18.12MPa and the rated pressure of the steam in front of the boiler of 16.7MPa, the pressure high protection function under a coordination control mode is ensured before the action of the boiler safety door by combining the combustion characteristic of the boiler and the load adjustment capability of the steam turbine, through various working condition adjustment tests, the optimal main steam pressure high fixed value, main steam pressure high-falling fixed value, the maximum load fixed value constant of a unit and the power generation load broken line function parameter value corresponding to the unloading steam pressure of the steam turbine are obtained, and each fixed value is shown in a table 1, and the broken line function parameter value is shown in a table 2:
TABLE 1 constant value
| Parameter name | 11-high pressure constant (MPa) | 12-high pressure Return value (MPa) | 26-maximum load value (MW) of unit |
| Numerical value | Cnt1＝17.52 | Cnt2＝17.02 | Cnt3＝300 |
TABLE 2 polyline function 23 parameter values
Under the premise of a machine-furnace coordination control mode and good quality of a front pressure measuring point (reliable main steam pressure measuring point), if the front main steam pressure is higher than 17.52MPa, a machine set main steam pressure high protection action memory state is triggered, and when the front pressure falls back to be lower than 17.02MPa, the pressure high protection action of a coordination control system is finished.
If the pressure of the coordinated control system is high and the system is in protection action, the set value SP of the steam turbine main control PID regulator is a load instruction which is superposed with a load offset value corresponding to the operation of the front main steam pressure through fx broken line function, the parameter value of the fx broken line function is shown in the table 2, and the increase of the output instruction of the boiler main control PID regulator is forbidden; if the coordinated control system is high in pressure and does not act in protection, the set value SP of the steam turbine main control PID regulator is a load instruction of a conventional coordinated control system, and the steam turbine main control normally regulates the power generation load and the boiler main control normally regulates the front pressure of the turbine.
An embodiment of the present invention further provides a machine and furnace coordination control system, as shown in fig. 4, including:
the acquisition module 1 is used for acquiring a target load instruction and a high-main-steam-pressure high-protection-action switching value state signal after the generator set triggers a high-main-steam-pressure high-protection action. For details, refer to the related description of step S10 in the above method embodiment, and are not described herein again.
And the steam turbine regulating module 2 is used for inputting the target load instruction into a steam turbine main control PID regulator, and the steam turbine main control PID regulator regulates the opening of a steam turbine steam inlet regulating valve according to the target load instruction to carry out pressure relief. For details, refer to the related description of step S20 in the above method embodiment, and are not described herein again.
And the boiler regulating module 3 is used for inputting the high-protection action switching value state signal of the main steam pressure into a boiler main control PID regulator, and the boiler main control PID regulator locks the total coal entering the boiler to be increased according to the high-protection action switching value state signal of the main steam pressure. For details, refer to the related description of step S30 in the above method embodiment, and are not described herein again.
An embodiment of the present invention provides a computer device, as shown in fig. 5, the device may include a processor 61 and a memory 62, where the processor 61 and the memory 62 may be connected by a bus or in another manner, and fig. 5 takes the connection by the bus as an example.
The processor 61 may be a Central Processing Unit (CPU). The Processor 61 may also be other general purpose processors, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs) or other Programmable logic devices, discrete Gate or transistor logic devices, discrete hardware components, or combinations thereof.
The memory 62, which is a non-transitory computer readable storage medium, may be used to store non-transitory software programs, non-transitory computer executable programs, and modules, such as the corresponding program instructions/modules in embodiments of the present invention. The processor 61 executes various functional applications and data processing of the processor by running non-transitory software programs, instructions and modules stored in the memory 62, that is, implements the machine furnace coordination control method in the above method embodiment.
The memory 62 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created by the processor 61, and the like. Further, the memory 62 may include high speed random access memory, and may also include non-transitory memory, such as at least one magnetic disk storage device, flash memory device, or other non-transitory solid state storage device. In some embodiments, the memory 62 may optionally include memory located remotely from the processor 61, and these remote memories may be connected to the processor 61 via a network. Examples of such networks include, but are not limited to, the internet, intranets, mobile communication networks, and combinations thereof.
One or more modules are stored in memory 62 and, when executed by processor 61, perform the furnace coordination control method in the embodiment shown in fig. 1-3.
The details of the computer device can be understood by referring to the corresponding descriptions and effects in the embodiments shown in fig. 1-3, and are not described herein again.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program that can be stored in a computer-readable storage medium and that when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic Disk, an optical Disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a Flash Memory (Flash Memory), a Hard Disk (Hard Disk Drive, abbreviated as HDD) or a Solid State Drive (SSD), etc.; the storage medium may also comprise a combination of memories of the kind described above.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications of the invention may be made without departing from the spirit or scope of the invention.
Claims (9)
1. A method for coordinately controlling a machine furnace is characterized by comprising the following steps:
after the generator set triggers the high protection action of the main steam pressure, a target load instruction and a switching value state signal of the high protection action of the main steam pressure are obtained;
inputting the target load instruction into a steam turbine main control PID regulator, and regulating the opening of a steam turbine steam inlet regulating valve by the steam turbine main control PID regulator according to the target load instruction to carry out pressure relief;
and inputting the main steam high-protection action switching value state signal into a boiler main control PID regulator, and locking the increase of the total coal entering the boiler by the boiler main control PID regulator according to the main steam high-protection action switching value state signal.
2. The machine-furnace coordination control method according to claim 1, further comprising:
acquiring the front main steam pressure of a steam turbine;
and judging whether the generator set triggers the high-pressure protection action of the main steam according to the relation between the main steam pressure before the generator set and a preset pressure value.
3. The machine-furnace coordination control method according to claim 2, wherein the determining whether the generator set triggers a main steam high pressure protection action according to the relation between the pre-machine main steam pressure and a preset pressure value comprises:
when the front main steam pressure is not less than a first preset pressure value, judging that the generator set triggers high protection action of the main steam pressure;
and when the front main steam pressure is smaller than a first preset pressure value, judging that the generator set does not trigger the high protection action of the main steam pressure.
4. The machine-furnace coordination control method according to claim 3, further comprising:
when the front main steam pressure is changed from being not less than a first preset pressure value to being not more than a second preset pressure value, the main steam pressure of the generator set is reset to be high in protection action, and the first preset pressure value is larger than the second preset pressure value.
5. The machine-furnace coordination control method according to claim 1, wherein the obtaining of the target load command after the generator set triggers the protection action of high main steam pressure comprises:
acquiring a current load instruction, a front main steam pressure of a steam turbine and a maximum load fixed value of the steam turbine;
performing offset operation on the front main steam pressure according to a preset high-pressure protection offset logic;
summing the current load instruction and the front main steam pressure after the offset operation to obtain a first load instruction;
and obtaining a target load instruction by taking a small value of the first load instruction and the maximum load fixed value of the unit.
6. The machine-furnace coordination control method according to claim 3, further comprising:
and when the generator set does not trigger the high-pressure protection action of the main steam, the generator set operates according to the preset control logic.
7. A coordinated control system of a machine furnace is characterized by comprising:
the acquisition module is used for acquiring a target load instruction and a high-main-steam-pressure high-protection-action switching value state signal after the generator set triggers a high-main-steam-pressure high-protection action;
the steam turbine regulating module is used for inputting the target load instruction into a steam turbine main control PID regulator, and the steam turbine main control PID regulator regulates the opening of a steam turbine steam inlet regulating valve to carry out pressure relief according to the target load instruction;
and the boiler regulating module is used for inputting the main steam pressure high-protection action switching value state signal into a boiler main control PID regulator, and the boiler main control PID regulator locks the increase of the total coal entering the boiler according to the main steam pressure high-protection action switching value state signal.
8. A computer-readable storage medium storing computer instructions for causing a computer to perform the method of coordinating control of a furnace of any of claims 1-6.
9. A computer device, comprising: a memory and a processor, the memory and the processor being communicatively connected to each other, the memory storing computer instructions, and the processor executing the computer instructions to perform the method of coordinating control of a furnace according to any one of claims 1 to 6.
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