CN113914959B - Modularized setting method for automatically switching unit operation modes - Google Patents
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- CN113914959B CN113914959B CN202111516257.9A CN202111516257A CN113914959B CN 113914959 B CN113914959 B CN 113914959B CN 202111516257 A CN202111516257 A CN 202111516257A CN 113914959 B CN113914959 B CN 113914959B
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- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000010977 unit operation Methods 0.000 title claims abstract description 14
- 238000000605 extraction Methods 0.000 claims abstract description 11
- 230000008569 process Effects 0.000 claims abstract description 7
- 238000004806 packaging method and process Methods 0.000 claims abstract description 4
- 230000001105 regulatory effect Effects 0.000 claims description 31
- 230000015271 coagulation Effects 0.000 claims description 6
- 238000005345 coagulation Methods 0.000 claims description 6
- 230000000630 rising effect Effects 0.000 claims description 6
- 238000005086 pumping Methods 0.000 claims description 5
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 238000009833 condensation Methods 0.000 abstract description 8
- 230000005494 condensation Effects 0.000 abstract description 8
- 239000007789 gas Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K13/00—General layout or general methods of operation of complete plants
- F01K13/02—Controlling, e.g. stopping or starting
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/14—Combined heat and power generation [CHP]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/16—Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Turbines (AREA)
Abstract
The invention discloses a modularized setting method for automatically switching unit operation modes, which adopts a modularized design idea to realize automatic sequential control logic for switching a backpressure mode into a drainage mode, performs modularized packaging, and presents the logic in a one-key switching control window form. The modular setting method for automatic switching of the unit operation mode realizes automatic sequential control design of the operation of switching the backpressure mode into the extraction and condensation mode, greatly simplifies the operation process, shortens the mode switching time, improves the automation level, effectively avoids operation risks and ensures the unit operation safety and the system equipment safety.
Description
Technical Field
The invention relates to the technical field of unit operation logic setting of a gas-steam combined cycle combined heat and power peak regulation power station, in particular to a modular setting method for automatically switching unit operation modes.
Background
The combined cycle combined heat and power supply peak regulating power station of gas and steam, i.e. gas turbine, waste heat boiler and steam turbine are combined into a combined cycle unit. The gas turbine is a high-efficiency high-power heavy gas turbine and has the capabilities of quick start and stop and quick load change; the steam turbine is a combined cycle heat supply type steam turbine, and three operation modes of pure condensation, extraction condensation and back pressure can be realized; the whole operation trend of summer peak regulation and winter heat supply is presented.
During winter heat supply, when the heat supply load is small in the earlier stage, the unit operates in a condensation mode, and when the large heat supply load is needed, the unit operates in a backpressure mode. And the operation that the unit operation mode is switched from the back pressure mode to the suction and condensation mode exists.
At present, the operation of back pressure cutting, pumping and condensing for the unit of the type has no automatic sequential control design, and still needs manual operation of an operator on duty. The working condition of the combined heat and power peak regulation unit changes frequently, the switching from a backpressure mode to a pumping coagulation mode needs to be carried out quickly when accident handling is involved, the manual switching operation items are multiple, the switching time is long, the risk is large, and the operation mode switching is not timely, so that the operation stability and the unit safety are greatly influenced.
Disclosure of Invention
In view of the above-mentioned drawbacks and deficiencies of the prior art, it would be desirable to provide a modular setup method for automatic switching of the operating modes of a unit.
The invention provides a modularization setting method for automatically switching unit operation modes, which adopts a modularization design idea, realizes automatic sequential control logic by switching the operation of a backpressure mode into a drainage mode, performs modularization packaging, and presents the logic in a one-key switching control window form, wherein the specific logic design comprises the steps of firstly judging switching allowable conditions, and switching flow sequential control after the judgment of the switching allowable conditions is met; the switching process sequence control comprises the following steps:
1) the system judges that the back pressure cutting extraction coagulation allowing condition is met, and executes a low-pressure starting main gate valve opening instruction;
2) the system judges that the low-pressure starting main gate valve is fully opened, the low-pressure communicating pipe main gate valve is fully closed, the opening of the low-pressure communicating pipe regulating valve is less than 1%, and the steam turbine is in a brake hanging state, and executes a starting state instruction of the low-pressure cylinder;
3) the system receives an SSS clutch unlocking signal, the rotating speed of a high and medium pressure cylinder is greater than that of a low pressure cylinder by 50rpm, a low-pressure starting main gate valve is fully opened, and after the unit stably runs for 10s, the low-pressure starting regulating gate valve enters an automatic opening regulating state; the system executes an instruction for setting the target rotating speed of the low-pressure cylinder to be 600rpm and maintaining the rising rate of 200rpm/min, and after the unit stably runs for 30s, the system executes an instruction for setting the target rotating speed of the low-pressure cylinder to be 3000rpm and maintaining the rising rate of 200 rpm/min;
4) the system judges that the rotating speed deviation of the high and medium pressure cylinder and the low pressure cylinder is not more than 50rpm, the expansion difference of the low pressure cylinder is less than 7mm, the axial displacement is-0.9 mm, the vibration is less than 125um, and the exhaust temperature of the low pressure cylinder is less than 80 ℃; after the unit stably operates for 30s, the SSS clutch executes an engagement instruction, the system judges that the SSS clutch is engaged and locked, waits for 60s, and during the period, an operator on duty operates to check the locking of the SSS clutch on site;
5) the system executes a low-pressure starting regulating gate valve opening instruction, so that the low-pressure cylinder is 15% of initial load;
6) after the unit stably runs for 30s, the system judges the steam turbine hanging brake state, executes a main gate valve opening instruction of a low-pressure communicating pipe, and simultaneously executes a low-pressure starting regulating gate valve closing instruction;
7) the system judges that the low-pressure starting regulating gate valve is closed, the low-pressure communicating pipe regulating gate valve is not closed and the intermediate discharge pressure is controlled to be input, and executes an opening instruction of the low-pressure communicating pipe regulating gate valve to maintain the intermediate discharge pipeline pressure to be stable between 0.15 and 0.4 MPa;
8) and ending the operation of the back pressure mode and the pumping coagulation mode.
Preferably, the back pressure cut extraction and condensation permission conditions comprise that medium pressure exhaust steam pressure is controlled to be put into operation, DEH is not controlled remotely, the opening degree of a valve position of an extraction regulating valve meets the conditions, an SSS clutch is disengaged, a low pressure starting regulating valve does not have a fault, a generator is connected to a grid, a steam turbine is connected to a brake, a low pressure rotating speed signal does not have a fault, and a communicating pipe pressure signal does not have a fault.
Compared with the prior art, the invention has the beneficial effects that:
the modular setting method for automatic switching of the unit operation mode realizes automatic sequential control design of the operation of switching the backpressure mode into the extraction and condensation mode, greatly simplifies the operation process, shortens the mode switching time, improves the automation level, effectively avoids operation risks and ensures the unit operation safety and the system equipment safety.
It should be understood that the statements herein reciting aspects are not intended to limit the critical or essential features of any embodiment of the invention, nor are they intended to limit the scope of the invention. Other features of the present invention will become apparent from the following description.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments made with reference to the following drawings:
fig. 1 is a schematic diagram illustrating a modularized setting method for automatically switching operation modes of a unit according to an embodiment of the present invention;
fig. 2 is a logic diagram of a modular setting method for automatically switching the unit operation modes.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
Referring to fig. 1 to 2, the invention provides a modular setting method for automatic switching of unit operation modes, which adopts a modular design idea to realize automatic sequential control logic for switching operation of a backpressure mode into a drainage mode, performs modular packaging, presents in a one-key switching control window form, and is designed to firstly perform switching permission condition judgment and switch flow sequential control after the switching permission condition judgment is satisfied; the logic design is specifically as follows: after the 'start' button is clicked, switching permission condition judgment is firstly carried out, after the switching permission condition judgment is met, the system executes a first step instruction, before executing a second step instruction, the system judges that the first step instruction is successfully executed, and the second step satisfies the execution condition, the second step instruction is executed, and so on until the sequence control switching operation is finished, and the 'end' button is clicked. If the safety of system equipment is influenced in the switching process, the system stops executing the current instruction and does not execute the next instruction any more through the 'stop' button emergency stop. The "start", "stop" and "end" buttons are implemented in a module for issuing start, stop and end commands. And judging that the instruction is successfully executed into one module by a certain allowable condition, and integrating the modules to form a complete sequential control module. In a preferred embodiment, the handover procedure sequence control includes the following steps:
1) the system judges that the back pressure cutting extraction coagulation allowing condition is met, clicks a 'start' button, and executes a low-pressure starting main gate valve opening instruction;
2) the system judges that the low-pressure starting main gate valve is fully opened, the low-pressure communicating pipe main gate valve is fully closed, the opening of the low-pressure communicating pipe regulating valve is less than 1%, and the steam turbine is in a brake hanging state, and executes a starting state instruction of the low-pressure cylinder;
3) the system receives an SSS clutch unlocking signal, the rotating speed of a high and medium pressure cylinder is greater than that of a low pressure cylinder by 50rpm, a low-pressure starting main gate valve is fully opened, and after the unit stably runs for 10s, the low-pressure starting regulating gate valve enters an automatic opening regulating state; the system executes an instruction for setting the target rotating speed of the low-pressure cylinder to be 600rpm and maintaining the rising rate of 200rpm/min, and after the unit stably runs for 30s, the system executes an instruction for setting the target rotating speed of the low-pressure cylinder to be 3000rpm and maintaining the rising rate of 200 rpm/min;
4) the system judges that the rotating speed deviation of the high and medium pressure cylinder and the low pressure cylinder is not more than 50rpm, the expansion difference of the low pressure cylinder is less than 7mm, the axial displacement is between-0.9 mm and 0.9mm, the vibration is less than 125um, and the exhaust temperature of the low pressure cylinder is less than 80 ℃. After the unit stably operates for 30s, the SSS clutch executes an engagement instruction, the system judges that the SSS clutch is engaged and locked, waits for 60s, and during the period, an operator on duty operates to check the locking of the SSS clutch on site;
5) the system executes a low-pressure starting regulating gate valve opening instruction, so that the low-pressure cylinder is 15% of initial load;
6) after the unit stably runs for 30s, the system judges the steam turbine hanging brake state, executes a main gate valve opening instruction of a low-pressure communicating pipe, and simultaneously executes a low-pressure starting regulating gate valve closing instruction;
7) the system judges that the low-pressure starting regulating gate valve is closed, the low-pressure communicating pipe regulating gate valve is not closed and the intermediate discharge pressure is controlled to be input, and executes an opening instruction of the low-pressure communicating pipe regulating gate valve to maintain the intermediate discharge pipeline pressure to be stable between 0.15 and 0.4 MPa.
8) And clicking an 'end' button to end the operation of the backpressure mode and the pumping and condensing mode.
In a preferred embodiment, the back pressure cut extraction and condensation allowance condition is that medium pressure exhaust steam pressure control is put into operation, DEH is not remotely controlled, the opening degree of a valve position of an extraction regulating valve meets the condition, an SSS clutch is disengaged, a low pressure starting regulating valve does not have a fault, a generator is connected to a grid, a steam turbine is connected to a brake, a low pressure rotating speed signal does not have a fault, and a communicating pipe pressure signal does not have a fault.
The working principle of the invention is as follows: setting a backpressure mode to a condensing mode switching window on a backpressure steam extraction mode switching picture, configuring corresponding logic on a bottom layer, opening the window needing to switch directions when the backpressure mode is switched to the condensing mode, firstly checking whether switching permission conditions are all met, clicking a switching start button after all the switching permission conditions are met, monitoring each switching step in the switching process, correctly executing according to requirements, after all the switching operations are completed, checking the state to display that the backpressure is switched to the condensing mode, clicking an end button, finishing the operation, and if equipment action abnormity or parameter abnormity occurs in the switching process, influencing the safety condition of system equipment, and emergently stopping through switching a stop button.
In the description of the present specification, the terms "connect", "mount", "fix", and the like are to be understood in a broad sense, for example, "connect" may be a fixed connection, a detachable connection, or an integral connection; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In the description of the present application, the description of the terms "one embodiment," "some embodiments," etc. means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (2)
1. A modularization setting method for automatically switching operation modes of a unit is characterized in that a modularization design idea is adopted, operation of switching a backpressure mode into a drainage mode is realized to realize automatic sequential control logic, modularization packaging is carried out, the operation is presented in a one-key switching control window form, specific logic design is that switching permission condition judgment is carried out firstly, and switching flow sequential control is carried out after the switching permission condition judgment is met; the switching process sequence control comprises the following steps:
1) the system judges that the back pressure cutting extraction coagulation allowing condition is met, and executes a low-pressure starting main gate valve opening instruction;
2) the system judges that the low-pressure starting main gate valve is fully opened, the low-pressure communicating pipe main gate valve is fully closed, the opening of the low-pressure communicating pipe regulating valve is less than 1%, and the steam turbine is in a brake hanging state, and executes a starting state instruction of the low-pressure cylinder;
3) the system receives an SSS clutch unlocking signal, the rotating speed of a high and medium pressure cylinder is greater than that of a low pressure cylinder by 50rpm, a low-pressure starting main gate valve is fully opened, and after the unit stably runs for 10s, the low-pressure starting regulating gate valve enters an automatic opening regulating state; the system executes an instruction for setting the target rotating speed of the low-pressure cylinder to be 600rpm and maintaining the rising rate of 200rpm/min, and after the unit stably runs for 30s, the system executes an instruction for setting the target rotating speed of the low-pressure cylinder to be 3000rpm and maintaining the rising rate of 200 rpm/min;
4) the system judges that the rotating speed deviation of the high and medium pressure cylinder and the low pressure cylinder is not more than 50rpm, the expansion difference of the low pressure cylinder is less than 7mm, the axial displacement is-0.9 mm, the vibration is less than 125um, and the exhaust temperature of the low pressure cylinder is less than 80 ℃; after the unit stably operates for 30s, the SSS clutch executes an engagement instruction, the system judges that the SSS clutch is engaged and locked, waits for 60s, and during the period, an operator on duty operates to check the locking of the SSS clutch on site;
5) the system executes a low-pressure starting regulating gate valve opening instruction, so that the low-pressure cylinder is 15% of initial load;
6) after the unit stably runs for 30s, the system judges the steam turbine hanging brake state, executes a main gate valve opening instruction of a low-pressure communicating pipe, and simultaneously executes a low-pressure starting regulating gate valve closing instruction;
7) the system judges that the low-pressure starting regulating gate valve is closed, the low-pressure communicating pipe regulating gate valve is not closed and the intermediate discharge pressure is controlled to be input, and executes an opening instruction of the low-pressure communicating pipe regulating gate valve to maintain the intermediate discharge pipeline pressure to be stable between 0.15 and 0.4 MPa;
8) and ending the operation of the back pressure mode and the pumping coagulation mode.
2. The modular setting method for automatic switching of unit operation modes according to claim 1, wherein the switching permission conditions are that medium-pressure exhaust steam pressure control is put into operation, DEH is not remotely controlled, the opening degree of a valve position of an exhaust steam regulating valve meets the conditions, an SSS clutch is disengaged, a low-pressure starting regulating valve is not in failure, a generator is connected to a grid, a steam turbine is connected to a gate, a low-pressure rotating speed signal is not in failure, and a communicating pipe pressure signal is not in failure.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111516257.9A CN113914959B (en) | 2021-12-13 | 2021-12-13 | Modularized setting method for automatically switching unit operation modes |
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| CN202111516257.9A CN113914959B (en) | 2021-12-13 | 2021-12-13 | Modularized setting method for automatically switching unit operation modes |
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| CN113914959A CN113914959A (en) | 2022-01-11 |
| CN113914959B true CN113914959B (en) | 2022-02-15 |
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Effective date of registration: 20220818 Address after: No.1, Lingang Economic Zone, Tianjin Binhai New Area Free Trade Zone, 300450 Patentee after: HUANENG (TIANJIN) COAL GASIFICATION POWER GENERATION Co.,Ltd. Patentee after: Huaneng Group R&D Center Co., Ltd. Address before: 300450 Tianjin Binhai New Area Lingang Economic Zone No. 1 Patentee before: HUANENG (TIANJIN) COAL GASIFICATION POWER GENERATION Co.,Ltd. |
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