CN115234310A - BEST small steam turbine pre-warming starting control system - Google Patents
BEST small steam turbine pre-warming starting control system Download PDFInfo
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- 238000012802 pre-warming Methods 0.000 title claims abstract description 92
- 238000010792 warming Methods 0.000 claims abstract description 61
- 238000000605 extraction Methods 0.000 claims description 107
- 230000001276 controlling effect Effects 0.000 claims description 68
- 230000001105 regulatory effect Effects 0.000 claims description 49
- 239000002184 metal Substances 0.000 claims description 35
- 230000001502 supplementing effect Effects 0.000 claims description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 239000007787 solid Substances 0.000 claims description 5
- 239000013589 supplement Substances 0.000 claims description 2
- 230000000630 rising effect Effects 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 17
- 238000011217 control strategy Methods 0.000 abstract description 7
- 230000008569 process Effects 0.000 description 11
- 238000010586 diagram Methods 0.000 description 10
- 238000005516 engineering process Methods 0.000 description 5
- 230000006870 function Effects 0.000 description 3
- 238000007599 discharging Methods 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 230000003287 optical effect Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D19/00—Starting of machines or engines; Regulating, controlling, or safety means in connection therewith
Abstract
The application relates to a BEST small steam turbine pre-warming starting control system. The system comprises: the system comprises a first pre-warming starting unit, a second pre-warming starting unit, a third pre-warming starting unit, a fourth pre-warming starting unit, a fifth pre-warming starting unit, a sixth pre-warming starting unit, a seventh pre-warming starting unit, an eighth pre-warming starting unit and a warming machine control unit, and the system optimizes and perfects a control strategy of pre-warming starting of the BEST small turbine and controls the BEST small turbine to execute warming operation. The method and the device have the advantages that the function of self-starting and pre-warming of the BEST small steam turbine is realized, the workload of operators is reduced, and the labor force is released.
Description
Technical Field
The application relates to the field of intelligent control of a BEST small turbine with a small generator of an ultra-supercritical secondary reheating coal-fired unit, in particular to a BEST small turbine pre-warming starting control system.
Background
In the related technology, the million-type BEST small steam turbines of the thermal power generating units with the small generators have the advantages of energy conservation and high efficiency, so that great success is achieved in the aspects of energy conservation and consumption reduction in the power generation field of China.
Because the BEST small turbine is always in a searching and researching state in the starting and pre-warming stage, a large amount of operation data and tests are needed to perfect and optimize the pre-warming starting sequence control, and the pre-warming starting control of the BEST small turbine is mainly realized through manual control. Therefore, a BEST small steam turbine pre-warming starting control system needs to be obtained through research by combining a multi-year debugging technology and a large number of pre-warming starting tests, the BEST small steam turbine can be automatically started, the application of an automatic control technology is realized, the workload of operators is reduced, and the labor force is released.
Disclosure of Invention
Therefore, the application provides a BEST small steam turbine pre-warming starting control system. The technical scheme of the application is as follows:
according to a first aspect of embodiments of the present application, there is provided a BEST small turbine pre-warm start control system, the system comprising:
the first pre-warming starting unit is used for respectively controlling the valve group interlocking input of the BEST small steam turbine, respectively controlling the first main valve and the second main valve of the BEST small steam turbine to be completely closed, respectively controlling the first number and the second number of the regulating valve of the BEST small steam turbine to be completely closed, and completely closing the second number steam extraction check valve, the third number steam extraction check valve, the fourth number steam extraction check valve, the fifth number steam extraction check valve, the sixth number steam extraction check valve and the seventh number steam extraction check valve of the BEST small steam turbine;
the second pre-warming starting unit is used for controlling the first AST electromagnetic valve, the second AST electromagnetic valve and the third AST electromagnetic valve to be electrified and controlling the feed pump to start after the running state of the oil system of the BEST small steam turbine is determined to meet the preset requirement;
the third pre-warming starting unit is used for controlling the opening of a first gate-adjusting front drain valve and a second gate-adjusting front drain valve of the BEST small turbine, controlling the opening of a first gate-adjusting rear drain valve and a second gate-adjusting rear drain valve of the BEST small turbine, controlling the opening of a second steam extraction drain valve, a third steam extraction drain valve, a fourth steam extraction drain valve, a fifth steam extraction drain valve, a sixth steam extraction drain valve and a seventh steam extraction drain valve, controlling a seventh steam extraction check valve to be fully closed, controlling a first main valve and a second main valve of the BEST small turbine to be fully closed, controlling a first regulating valve and a second regulating valve of the BEST small turbine to be fully closed, controlling an overflow regulating valve and a check valve of the BEST small turbine to be closed, controlling a seventh low-pressure gas supply regulating valve to be closed, and controlling a steam exhaust bypass valve of the BEST small turbine to be fully opened;
the fourth pre-warming starting unit is used for determining whether the temperature difference between the upper cylinder and the lower cylinder is smaller than a first preset temperature, determining whether a first gate regulating valve limit and a second gate regulating valve limit of the BEST are both larger than a first preset threshold value, determining whether the actual rotating speed of the BEST small turbine is larger than the first preset rotating speed, and determining whether the superheat degree of main valve steam of the BEST small turbine is larger than a second preset temperature;
the fifth pre-warming starting unit is used for determining whether the temperature of a measuring point of 50% of the metal temperature on the left side of the main throttle valve and the temperature of a measuring point of 50% of the metal temperature on the left side of the main throttle valve are both greater than a third preset temperature;
a sixth pre-warm start unit for determining whether the TAB value is greater than a second preset threshold, and determining whether the AST oil pressure is greater than the second preset threshold;
the seventh pre-warming starting unit is used for controlling the first main valve and the second main valve of the BEST small turbine to be fully opened, controlling the seventh steam supplementing valve, the overflow valve and the steam extraction electric valve to be opened, controlling the bypass steam exhaust electric valve of the BEST small turbine to be opened, controlling the seventh steam supplementing valve to be automatically put into operation, controlling the seventh steam supplementing adjusting valve to be closed, controlling the steam exhaust bypass valve of the BEST small turbine to be fully opened, and controlling the bypass valve to be quickly closed to be de-energized;
the eighth pre-warming starting unit is used for determining whether the rotating speed of the BEST small turbine is greater than the first preset rotating speed or not;
and the warm-up control unit is used for controlling the BEST small turbine to execute warm-up operation.
According to an embodiment of the application, the first pre-warming starting unit comprises a switching value input module which is interlocked and put into a first valve group of a BEST small turbine, a switching value input module which is interlocked and put into a second valve group of the BEST small turbine, a switching value input module which is fully closed of a first main valve of the BEST small turbine, a switching value input module which is fully closed of a second main valve of the BEST small turbine, a switching value input module which is fully closed of a first regulating valve of the BEST small turbine, a switching value input module which is fully closed of a second regulating valve of the BEST small turbine, a switching value input module which is less than 5% of valve positions from a second steam extraction check valve to a seventh steam extraction check valve of the BEST small turbine, a first and module and a first completion switching value output module of a BEST small turbine warming system; wherein:
the switching value input module of the first valve group interlocking input of the BEST small turbine, the switching value input module of the second valve group interlocking input of the BEST small turbine, the switching value input module of the first main valve full close of the BEST small turbine, the switching value input module of the second main valve full close of the BEST small turbine, the switching value input module of the first regulating valve full close of the BEST small turbine, the switching value input module of the second regulating valve full close of the BEST small turbine, and the switching value input modules of the second steam extraction check valve to the seventh steam extraction check valve of the BEST small turbine, wherein the valve positions of the second steam extraction check valve to the seventh steam extraction check valve are all less than 5 percent and are respectively connected with the input ends of the first and second modules;
and the output end of the first and module is connected with a first switching value output module for finishing the warming system of the BEST small turbine.
According to an embodiment of the application, the second pre-warming starting unit comprises a switching value input module with normal oil pressure of the BEST small turbine, a switching value input module with starting permission of a water feeding pump, a switching value input module with electrified first AST solenoid valve, a switching value input module with electrified second AST solenoid valve, a switching value input module with electrified third AST solenoid valve, a second AND module and a second switching value output module for completing warming-up system of the BEST small turbine; wherein:
the switching value input module with normal oil pressure of the BEST small steam turbine, the switching value input module allowing the water feeding pump to be started, the switching value input module with the electrified first AST electromagnetic valve, the switching value input module with the electrified second AST electromagnetic valve and the switching value input module with the electrified third AST electromagnetic valve are respectively connected with the input ends of the second and module;
and the output end of the second and module is connected with a second switching value output module for finishing the warming system of the BEST small turbine.
According to one embodiment of the present application, the third pre-warming starting unit comprises a switching value input module for opening a first trap front drain valve of the BEST small turbine, a switching value input module for opening a second trap front drain valve of the BEST small turbine, a switching value input module for opening a first trap rear drain valve of the BEST small turbine, a switching value input module for opening a second trap rear drain valve of the BEST small turbine, a switching value input module for fully opening second to seventh steam extraction drain valves of the BEST small turbine, a switching value input module for fully closing first main steam valves and 2 main steam valves of the BEST small turbine, a switching value input module for fully closing first trap doors and 2 trap valves of the BEST small turbine, a switching value input module for fully closing overflow regulating valves and check valves of the BEST small turbine, a switching value input module for fully closing seven low-pressure air supply regulating valves of the BEST small turbine, a switching value input module for fully opening a BEST small steam exhaust bypass valve, a third switching value input module for fully opening a BEST small turbine and a BEST small turbine switching value output module for completing warming-up; wherein:
the switching value input module for opening a first steam trap of the BEST small steam turbine, the switching value input module for opening a second steam trap of the BEST small steam turbine, the switching value input module for fully opening a second steam trap to a seventh steam extraction steam trap of the BEST small steam turbine, the switching value input module for fully closing a first main steam valve and a 2 main steam valve of the BEST small steam turbine, the switching value input module for fully closing a first steam trap and a 2 throttle trap of the BEST small steam turbine, the switching value input module for fully closing an overflow regulating valve and a check valve of the BEST small steam turbine, the switching value input module for fully closing a seven low plus regulating valve of the BEST small steam turbine, and the switching value input module for fully opening a fully discharge bypass valve of the BEST small steam turbine are respectively connected with the input end of the third steam trap and the third steam trap;
and the third completion switching value output module of the small turbine warming system at the output end BEST of the third and module is connected.
According to an embodiment of the application, the fourth pre-warming starting unit comprises a switching value input module, a switching value output module and a fourth switching value output module, wherein the temperature difference between an upper cylinder and a lower cylinder of the BEST small turbine is smaller than a first preset temperature, the switching value input module is used for setting the first switching valve and the second switching valve of the BEST small turbine to be larger than a first preset threshold value, the switching value input module is used for setting the actual rotating speed of the BEST small turbine to be larger than the first preset rotating speed, the switching value input module is used for setting the main valve steam superheat degree of the BEST small turbine to be larger than a second preset temperature, the fourth and module and the fourth switching value output module are used for completing the warming system of the BEST small turbine; wherein:
the switching value input module of which the temperature difference between an upper cylinder and a lower cylinder of the BEST small turbine is less than a first preset temperature, the switching value input module of which the first switching valve and the second switching valve of the BEST small turbine are more than a first preset threshold value, the switching value input module of which the actual rotating speed is more than a first preset rotating speed and the switching value input module of which the main valve steam superheat degree is more than a second preset temperature are respectively connected with the input ends of the fourth and the fourth modules;
and the output end of the fourth and module is connected with a fourth switching value output module for completing the warming system of the BEST small turbine.
According to an embodiment of the application, the fifth pre-warming starting unit comprises a switching value input module, a switching value output module and a fifth completion switching value output module, wherein the temperature of a point, 50% of the metal temperature on the left side of a main valve of the BEST small steam turbine is greater than a third preset temperature, the temperature of a point, 50% of the metal temperature on the right side of the main valve of the BEST small steam turbine is greater than the third preset temperature, and the fifth completion switching value output module is used for controlling the switching value input module and the switching value output module; wherein:
the switching value input module of which the temperature of a metal temperature 50% measuring point at the left side of a main throttle valve of the BEST small steam turbine is greater than a third preset temperature and the switching value input module of which the temperature of a metal temperature 50% measuring point at the right side of the main throttle valve of the BEST small steam turbine is greater than the third preset temperature are respectively connected with the input ends of the fifth and the fifth modules;
and the output end of the fifth and module is connected with a fifth switching value output module for finishing the warming system of the BEST small turbine.
According to an embodiment of the application, the sixth pre-warming starting unit comprises a switching value input module of a TAB of the BEST small turbine in an automatic mode, a switching value input module of which the AST oil pressure is greater than a second preset threshold value, a switching value input module which automatically rises to the TAB of the BEST small turbine by a second preset threshold value, a sixth AND module and a sixth completion switching value output module of a BEST small turbine warming system; wherein:
the switching value input module of the TAB of the BEST small turbine in an automatic mode, the switching value input module of the AST oil pressure which is larger than a second preset threshold value and the switching value input module which is automatically increased to the second preset threshold value of the TAB of the BEST small turbine are respectively connected with the input end of the sixth and module;
and the output end of the sixth and module is connected with a sixth switching value output module for finishing the warming system of the BEST small turbine.
According to an embodiment of the application, the seventh pre-warming starting unit comprises a switching value input module for fully opening a first main valve and a second main valve of the BEST small turbine, a switching value input module for fully opening a seventh steam supplementing, overflowing and extracting electric valve, a switching value input module for fully opening a bypass steam exhaust electric valve of the BEST small turbine, a switching value input module for automatically putting the seventh steam supplementing valve into operation, a switching value input module for closing a seventh steam supplementing adjusting valve, a switching value input module for fully opening a steam exhaust bypass valve of the BEST small turbine, a switching value input module for quickly closing a bypass valve of the BEST small turbine and adjusting the bypass valve, a seventh and module and a seventh switching value output module for completing a warming system of the BEST small turbine; wherein:
the input module of the switching value of the first main valve and the second main valve of the BEST small steam turbine, the input module of the switching value of the opened seven-number steam supplementing, overflowing and steam extracting electric valve, the input module of the switching value of the opened bypass steam exhaust electric valve of the BEST small steam turbine and the input module of the switching value of the seven-number steam supplementing valve which is automatically put into use are respectively connected with the input ends of the seventh and the module;
and the output end of the seventh and module is connected with a seventh switching value output module for completing the warming system of the BEST small turbine.
According to one embodiment of the application, the eighth pre-warming starting unit comprises an analog quantity input module of the actual rotating speed of the BEST small turbine and an eighth finishing switching quantity output module of the first finishing switching quantity larger than the module and a BEST small turbine warming system; wherein:
the analog quantity input module of the actual rotating speed of the BEST small steam turbine is connected with the input end of the first larger-ratio module;
and the output end of the first larger-ratio module is connected with an eighth finishing switching value output module of the BEST small turbine warming system.
According to one embodiment of the application, the warming-up control unit comprises an analog quantity input module of the metal temperature of the real inner cylinder of the BEST small steam turbine, a first comparison smaller than module, a first delay module, a second comparison larger than module, a second delay module, an eighth comparison module and a ninth completion switching value output module of the warming-up system of the BEST small steam turbine; wherein:
the analog quantity input module of the actual inner cylinder metal temperature of the BEST small steam turbine is respectively connected with the input end of the first comparison larger module and the input end of the second comparison larger module; the first less than module and the first more than module are respectively used for comparing the input quantity of the analog quantity input module of the BEST small steam turbine solid inner cylinder metal temperature with 150 ℃;
the output end of the first delay module is connected with the input end of the first delay module;
the output end of the second comparison greater module is connected with the input end of the second delay module;
the output end of the first delay module and the output end of the second delay module are respectively connected with the input ends of the eighth and module;
and the output end of the eighth and module is connected with a ninth finishing switching value output module of the BEST small turbine warming system.
According to an embodiment of the present application, the first preset temperature is 42 ℃; the first preset threshold value is 105%; the first preset rotating speed is 100r/min; the second preset temperature is 30 ℃; the third preset temperature is 150 ℃; the second preset threshold is 62.5%; the first preset rotating speed is 999r/min.
The technical scheme provided by the embodiment of the application at least has the following beneficial effects:
the control strategy of the pre-warming starting of the BEST small turbine is optimized and perfected by the system characteristics and the operation parameters of the BEST small turbine and the debugging result of the BEST small turbine during debugging, and the pre-warming starting control strategy scheme of the BEST small turbine is provided by combining the operation characteristics of the BEST small turbine, so that the BEST small turbine is warmed up successfully and the rotating speed of the BEST small turbine reaches 1000r/min, and a solid foundation is laid for the next starting process of the BEST small turbine. In addition, the function of self-starting and pre-warming of the BEST small turbine is realized, the application of an automatic control technology is completely realized, the workload of operators is reduced, and the labor force is released.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the application and are not to be construed as limiting the application.
FIG. 1 is a flow chart of a BEST small turbine pre-warm start control system in an embodiment of the present application;
FIG. 2 is a schematic diagram of a first pre-warm boot unit in an embodiment of the present application;
FIG. 3 is a schematic diagram of a second pre-warm boot unit in an embodiment of the present application;
FIG. 4 is a schematic diagram of a third pre-warm boot unit in an embodiment of the present application;
FIG. 5 is a schematic diagram of a fourth pre-warm boot unit in an embodiment of the present application;
FIG. 6 is a schematic diagram of a fifth pre-warm boot unit in an embodiment of the present application;
FIG. 7 is a schematic diagram of a sixth pre-warm boot unit in an embodiment of the present application;
FIG. 8 is a schematic diagram of a seventh pre-warm boot unit in an embodiment of the present application;
FIG. 9 is a schematic structural diagram of an eighth pre-warm boot unit in an embodiment of the present application;
fig. 10 is a schematic structural view of a warm-up control unit in the embodiment of the present application;
fig. 11 is a schematic structural diagram of a small turbine driven generator in BEST in the embodiment of the present application.
Reference numerals
1. A first main throttle; 2. a second main throttle valve; 3. a first main steam adjusting door; 4. a second main steam adjusting door; 5. a second steam extraction electric valve; 6. a third steam extraction electric valve; 7. a fourth steam extraction electric valve; 8. a fifth steam extraction electric valve; 9. a six-number steam extraction electric valve; 10. pumping a check valve No. seven; 11. a No. seven steam extraction electric valve; 12. a steam exhaust header; 13. an overflow valve pipeline stop valve; 14. a bypass valve; 15. an overflow valve; 16. a steam supply valve; 17. BEST small steam turbine; 18. a generator; 19. a current transformer.
Detailed Description
In order to make the technical solutions of the present application better understood by those of ordinary skill in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be implemented in sequences other than those illustrated or described herein. The implementations described in the following exemplary examples do not represent all implementations consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.
Based on the self system characteristics and the operation parameters of the BEST small turbine, the control strategy of the prewarming starting of the BEST small turbine is optimized and perfected by combining the debugging result of the BEST small turbine during debugging, and the prewarming starting control strategy scheme of the BEST small turbine is provided by combining the operation characteristics of the BEST small turbine, so that the BEST small turbine is successfully warmed up, the rotating speed of the BEST small turbine reaches 1000r/min, and a solid foundation is laid for the next starting process of the BEST small turbine.
It should be noted that, as shown in fig. 11, the small BEST turbine 17 is connected to the generator 18 through a transmission shaft, the generator 18 is connected to the converter 19, the small BEST turbine 17 is connected to the steam source through two steam input pipelines, one of the steam input pipelines is provided with the first main throttle 1 and the first main throttle 3, and the other steam input pipeline is provided with the second main throttle 2 and the second main throttle 4. The seven steam extraction outlet of the BEST small steam turbine 17 is sequentially connected with a seven steam extraction check valve 10, a seven steam extraction electric valve 11 and a steam extraction header tank 12 through pipelines, the steam extraction header tank 12 is respectively connected with a steam source, a condenser, an eight low heater and a seven low heater through pipelines, the pipeline between the steam extraction header tank 12 and the eight low heater is connected with an overflow valve 15 pipeline stop valve 13 and an overflow valve 15, the pipeline between the steam extraction header tank 12 and the condenser is connected with a bypass valve 14, the pipeline between the steam extraction header tank 12 and the steam source is connected with a steam supplementing valve 16, and the steam extraction pipes of the BEST small steam turbine 17 are respectively provided with a second steam extraction outlet, a third steam extraction outlet, a fourth steam extraction outlet, a fifth steam extraction outlet and a sixth steam extraction outlet are respectively provided with a second main steam regulating valve 4, a third steam extraction electric valve 6, a fourth steam extraction electric valve 7, a fifth steam extraction electric valve 8 and a sixth steam extraction electric valve 9.
Fig. 1 is a block diagram of a warm-up start control system of a small BEST turbine according to an embodiment of the present application.
As shown in fig. 1, the BEST small turbine pre-warm start control system includes a first pre-warm start unit 101, a second pre-warm start unit 102, a third pre-warm start unit 103, a fourth pre-warm start unit 104, a fifth pre-warm start unit 105, a sixth pre-warm start unit 106, a seventh pre-warm start unit 107, an eighth pre-warm start unit 108, and a warm-up machine control unit 109.
The first pre-warming starting unit 101 is used for respectively controlling the valve group interlocking input of the BEST small turbine, respectively controlling the first main valve and the second main valve of the BEST small turbine to be fully closed, respectively controlling the first regulating valve and the second regulating valve of the BEST small turbine to be fully closed, and respectively controlling the second steam extraction check valve, the third steam extraction check valve, the fourth steam extraction check valve, the fifth steam extraction check valve, the sixth steam extraction check valve and the seventh steam extraction check valve of the BEST small turbine to be fully closed;
the second pre-warming starting unit 102 is used for controlling the first AST electromagnetic valve, the second AST electromagnetic valve and the third AST electromagnetic valve to be electrified and controlling the feed pump to start after the running state of the oil system of the BEST small steam turbine is determined to meet the preset requirement;
the third pre-warming starting unit 103 is used for controlling the opening of a first-gate front drain valve and a second-gate front drain valve of the BEST small turbine, the opening of a first-gate rear drain valve and a second-gate rear drain valve of the BEST small turbine, controlling the opening of a second-gate steam extraction drain valve, a third-gate steam extraction drain valve, a fourth-gate steam extraction drain valve, a fifth-gate steam extraction drain valve, a sixth-gate steam extraction drain valve and a seventh-gate steam extraction drain valve, controlling the full closing of a seventh-gate steam extraction check valve, controlling the full closing of a first main gate and a second main gate of the BEST small turbine, controlling the full closing of the first-gate and the second-gate of the BEST small turbine, controlling the closing of an overflow regulating valve and a check valve of the BEST small turbine, controlling the closing of a seventh-up air-supplement regulating valve and controlling the full opening of an exhaust valve of the BEST small turbine;
the fourth pre-warming starting unit 104 is used for determining whether the temperature difference between the upper cylinder and the lower cylinder is smaller than a first preset temperature, determining whether a first gate regulating valve limit and a second gate regulating valve limit of the BEST are both larger than a first preset threshold, determining whether the actual rotating speed of the BEST small turbine is larger than the first preset rotating speed, and determining whether the superheat degree of main valve steam of the BEST small turbine is larger than a second preset temperature;
a fifth pre-warming starting unit 105, configured to determine whether the temperature at the point where the metal temperature on the left side of the main throttle is 50% and the temperature at the point where the metal temperature on the left side of the main throttle is 50% are both greater than a third preset temperature;
a sixth pre-warm start unit 106 for determining whether the TAB value is greater than a second preset threshold, and determining whether the AST oil pressure is greater than the second preset threshold;
the seventh pre-warming starting unit 107 is used for controlling a first main valve and a second main valve of the BEST small steam turbine to be fully opened, controlling a seventh steam supplementing valve, an overflow valve and a steam extraction electric valve to be opened, controlling a bypass steam exhaust electric valve of the BEST small steam turbine to be opened, controlling the seventh steam supplementing valve to be automatically put into operation, controlling the seventh steam supplementing adjusting valve to be closed, controlling a steam exhaust bypass valve of the BEST small steam turbine to be fully opened, and controlling a bypass valve to be quickly closed to be de-energized;
an eighth pre-warming starting unit 108, configured to determine whether the rotation speed of the small turbine BEST is greater than the first preset rotation speed;
and a warm-up control unit 109 for controlling the small BEST turbine to perform a warm-up operation.
In some embodiments of the present application, as shown in fig. 2, the first pre-warming starting unit 101 includes a switching value input module 201 in which a first valve group of the BEST small turbine is interlocked and put, a switching value input module 202 in which a second valve group of the BEST small turbine is interlocked and put, a switching value input module 203 in which a first main valve of the BEST small turbine is fully closed, a switching value input module 204 in which a second main valve of the BEST small turbine is fully closed, a switching value input module 205 in which a first throttle of the BEST small turbine is fully closed, a switching value input module 206 in which a second throttle of the BEST small turbine is fully closed, a switching value input module 207 in which valve positions of a second steam extraction check valve to a seventh steam extraction check valve of the BEST small turbine are all less than 5%, a first and module 209, and a first completion switching value output module 208 of the BEST small turbine warming system; wherein: a switching value input module 201 put into a first valve bank interlock of a BEST small turbine, a switching value input module 202 put into a second valve bank interlock of the BEST small turbine, a switching value input module 203 put into a first main valve fully-closed state of the BEST small turbine, a switching value input module 204 put into a second main valve fully-closed state of the BEST small turbine, a switching value input module 205 put into a first regulating valve fully-closed state of the BEST small turbine, a switching value input module 206 put into a second regulating valve fully-closed state of the BEST small turbine, and a switching value input module 207, of which the valve positions from a second steam extraction check valve to a seventh steam extraction check valve of the BEST small turbine are all less than 5%, are respectively connected with the input ends of the first and the second modules 209; the output of the first and module 209 is connected to a first complete switching value output module 208 of the BEST small turbine warming system.
The interlock state indicates that the device is completed in the set range and the operation in the set order.
That is, when the first valve bank of the small BEST turbine is in the interlock input state, the output signal of the switching value input module 201 in which the first valve bank of the small BEST turbine is in the interlock input state is 1; when the second valve bank interlock of the BEST small turbine is in an input state, the output signal of the switching value input module 202 in which the second valve bank interlock of the BEST small turbine is input is 1; when the first main valve of the BEST small turbine is in a fully closed state, the output signal of the switching value input module 203 for fully closing the first main valve of the BEST small turbine is 1; when the second main throttle of the BEST small turbine is in a fully closed state, the output signal of the switching value input module 204 for fully closing the second main throttle of the BEST small turbine is 1; when the first throttle of the small BEST turbine is in a fully closed state, the output signal of the switching value input module 205 for fully closing the first throttle of the small BEST turbine is 1; when the second gate of the small BEST turbine is in a fully closed state, the output signal of the switching value input module 206 for fully closing the second gate of the small BEST turbine is 1; when the valve positions of the second steam extraction check valve, the third steam extraction check valve, the fourth steam extraction check valve, the fifth steam extraction check valve, the sixth steam extraction check valve and the seventh steam extraction check valve of the BEST small turbine are all less than 5%, the output signal of the switching value input module 207 is 1, wherein the valve positions of the second steam extraction check valve to the seventh steam extraction check valve of the BEST small turbine are all less than 5%. If the switching value signal output by any one of the modules is 0, the output signal of the first and module 209 is 0, and the first pre-warming starting unit 101 is controlled to adjust and process the module with the output switching value signal of 0 again until the output signal of the first and module 209 is 1.
As an example of a possible implementation, after the first completion switching value output module 208 of the BEST small turbine warming system receives the output signal 1 of the first and module, the first completion switching value output module 208 of the BEST small turbine warming system sends a current task completion signal to the second pre-warming starting unit 102, and the second pre-warming starting unit 102 executes the to-be-executed operation of the unit after receiving the current task completion signal.
In some embodiments of the present application, as shown in fig. 3, the second pre-warming starting unit 102 includes a switching value input module 301 in which the oil pressure of the small BEST turbine is normal, a switching value input module 302 in which the water feed pump is allowed to start, a switching value input module 303 in which the first AST solenoid valve is electrified, a switching value input module 304 in which the second AST solenoid valve is electrified, a switching value input module 305 in which the third AST solenoid valve is electrified, a second and module 307, and a second completion switching value output module 306 of the warming system of the small BEST turbine; wherein: a switching value input module 301 for normal oil pressure of the BEST small turbine, a switching value input module 302 for allowing a water feeding pump to be started, a switching value input module 303 for electrifying the first AST electromagnetic valve, a switching value input module 304 for electrifying the second AST electromagnetic valve and a switching value input module 305 for electrifying the third AST electromagnetic valve are respectively connected with the input ends of a second and module 307; the output end of the second and module 307 is connected with a second completion switching value output module 306 of the BEST small turbine warming system.
That is, when the oil pressure of the small BEST turbine is normal, and the output signal of the switching value input module 301 where the oil pressure of the small BEST turbine is normal is 1; when the water feed pump is in the starting permission state, namely the current state meets the starting condition of the water feed pump, the output signal of the switching value input module 302 for starting permission of the water feed pump is 1; when the first AST electromagnetic valve is in an electrified state, an output signal of the electrified switching value input module 303 of the first AST electromagnetic valve is 1; when the second AST solenoid valve is in an electrified state, the output signal of the electrified switching value input module 304 of the second AST solenoid valve is 1; when the AST solenoid valve No. three is in the charged state, the output signal of the switching value input block 305 for charging the AST solenoid valve No. three is 1. If the switching value signal output by any of the above modules is 0, the output signal of the second and module 307 is 0, and the second pre-warming starting unit 102 is controlled to adjust and process the module whose output switching value signal is 0 again until the output signal of the second and module 307 is 1.
As an example of a possible implementation, after the second completion switching value output module 30 of the BEST small turbine warming system receives the output signal 1 of the second sum module 307, the second completion switching value output module 306 of the BEST small turbine warming system sends a current task completion signal to the third pre-warming starting unit 103, and the third pre-warming starting unit 103 executes the to-be-executed operation of the unit after receiving the current task completion signal.
In some embodiments of the present application, as shown in fig. 4, the third pre-warming start unit 103 includes a switching value input module 401 for opening a first before-gate trap of the small BEST turbine, a switching value input module 402 for opening a second before-gate trap of the small BEST turbine, a switching value input module 403 for opening a first after-gate trap of the small BEST turbine, a switching value input module 404 for opening a second after-gate trap of the small BEST turbine, a switching value input module 405 for fully opening second to seventh steam extraction traps of the small BEST turbine, a switching value input module 40 for fully closing the first and 2 main gates of the small BEST turbine with an opening degree less than 3%, a switching value input module 407 for fully closing the first and 2 after-gate steam extraction traps of the small BEST turbine, a switching value input module 407 for fully closing the first and 2 after-gate steam extraction traps, a switching value input module 408 for fully closing the BEST relief valves and check valves, a switching value input module for fully closing the seventh after-gate steam extraction trap of the small BEST turbine, a switching value input module 412 for fully closing the BEST steam extraction trap, a third after-gate bypass valve input module 410 for completing warming up and a third after-steam extraction steam turbine output module 410; the system comprises a switching value input module 401 for opening a first-number gate front trap of a BEST small turbine, a switching value input module 402 for opening a second-number gate front trap of the BEST small turbine, a switching value input module 403 for opening a first-number gate rear trap of the BEST small turbine, a switching value input module 404 for opening a second-number gate rear trap of the BEST small turbine, a switching value input module 405 for fully opening second-number to seventh-number steam extraction traps of the BEST small turbine, a switching value input module 40 for fully closing a first-number main valve and a 2-number main valve of the BEST small turbine with the opening smaller than 3%, a switching value input module 407 for fully closing a first-number gate and a 2-number gate of the BEST small turbine, a switching value input module 408 for fully closing an overflow regulating valve and a check valve of the BEST small turbine, a switching value input module 409 for closing a low-number air-adding regulating valve and a fully-closing regulating valve of the BEST small turbine, a switching value input module 412 for fully opening a bypass valve of the BEST small turbine, and a third-number input module 410 of the BEST small turbine; the third completion switching value output module 413 of the small turbine warming system of the output BEST of the third and module 412 is connected.
That is to say, when the first throttle front trap of the small BEST turbine is opened, the output signal of the opening and closing amount input module 401 for opening the first throttle front trap of the small BEST turbine is 1; when a second gate front drain valve of the BEST small turbine is opened, the output signal of the switching value input module 402 for opening the second gate front drain valve of the BEST small turbine is 1; when a first-number gate-adjusted rear drain valve of the BEST small turbine is opened, the output signal of a switching value input module 403 for opening the first-number gate-adjusted rear drain valve of the BEST small turbine is 1; when the second-number post-gate-regulation drainage valve of the BEST small turbine is opened, the output signal of the switching value input module 404 for opening the second-number post-gate-regulation drainage valve of the BEST small turbine is 1; when the second to seventh steam extraction steam traps of the BEST small steam turbine are all opened, the output signal of the switching value input module 405 for the second to seventh steam extraction steam traps of the BEST small steam turbine is 1; when the opening of the No. seven steam extraction check valve of the BEST small turbine is less than 3%, the output signal of the switching value input module 406 with the opening of the No. seven steam extraction check valve of the BEST small turbine less than 3% is 1; when the first main throttle valve and the 2 main throttle valve of the BEST small turbine are fully closed, the output signal of the switching value input module 407 for fully closing the first main throttle valve and the 2 main throttle valve of the BEST small turbine is 1; when the first number of the BEST small turbine gate and the 2 gate are fully closed, the output signal of the switching value input module 408 for fully closing the first number of the BEST small turbine gate and the 2 gate is 1; when the BEST small turbine overflow regulating valve and the check valve are closed completely, the output signal of the switching value input module 409 for closing the BEST small turbine overflow regulating valve and the check valve completely is 1; when the seven-stage low-pressure gas supply regulating valve of the BEST small turbine is closed, the output signal of the switching value input module 410 for closing the seven-stage low-pressure gas supply regulating valve of the BEST small turbine is 1; when the small turbine exhaust bypass valve in BEST is fully opened, the output signal of the switching value input module 411 of the small turbine exhaust bypass valve in BEST is 1. If the switching value signal output by any of the above modules is 0, the output signal of the third and module 412 is 0, and the third pre-warming starting unit 103 is controlled again to adjust and process the module with the output switching value signal of 0 until the output signal of the third and module 412 is 1.
As an example of a possible implementation, after the third complete switching value output module 413 of the BEST small turbine warming system receives the output signal 1 of the third and module 412, the third complete switching value output module 413 of the BEST small turbine warming system sends a current task completion signal to the fourth pre-warming starting unit 104, and the fourth pre-warming starting unit 104 executes the to-be-executed operation of the unit after receiving the current task completion signal.
In some embodiments of the present application, as shown in fig. 5, the fourth pre-warming starting unit 104 includes a switching value input module 501 where the temperature difference between the upper cylinder and the lower cylinder of the BEST small turbine is less than a first preset temperature, a switching value input module 502 where the threshold of the first and second gates of the BEST small turbine is greater than a first preset threshold, a switching value input module 503 where the actual speed of the BEST small turbine is greater than the first preset speed, a switching value input module 504 where the superheat degree of the main steam of the BEST small turbine is greater than a second preset temperature, a fourth and module 505, and a fourth switching value output module 506 of the BEST small turbine warming system; the switching value input module 501 that the temperature difference between an upper cylinder and a lower cylinder of the BEST small turbine is smaller than a first preset temperature, the switching value input module 502 that the first regulating valve and the second regulating valve of the BEST small turbine have valve limits larger than a first preset threshold value, the switching value input module 503 that the actual rotating speed of the BEST small turbine is larger than a first preset rotating speed, and the switching value input module 504 that the main valve steam superheat degree of the BEST small turbine is larger than a second preset temperature are respectively connected with the input ends of the fourth and module 505; the output end of the fourth and module 505 is connected with a fourth completion switching value output module 506 of the BEST small turbine warming system.
That is, when the temperature difference between the upper cylinder and the lower cylinder of the small BEST turbine is smaller than the first preset temperature, the output signal of the switching value input module 501, in which the temperature difference between the upper cylinder and the lower cylinder of the small BEST turbine is smaller than the first preset temperature, is 1; when the first and second turnstile valve limits of the BEST small turbine are larger than a first preset threshold, the output signal of the switching value input module 502 of which the first and second turnstile valve limits are larger than the first preset threshold is 1; when the actual rotating speed of the small BEST turbine is greater than the first preset rotating speed, the output signal of the switching value input module 503, where the actual rotating speed of the small BEST turbine is greater than the first preset rotating speed, is 1; when the main valve steam superheat degree of the small BEST turbine is higher than the second preset temperature, the output signal of the switching value input module 504, in which the main valve steam superheat degree of the small BEST turbine is higher than the second preset temperature, is 1. If the switching value signal output by any of the above modules is 0, the output signal of the fourth and module 505 is 0, and the fourth warm-up start unit 104 is controlled again to adjust and process the module whose output switching value signal is 0 until the output signal of the fourth and module 505 is 1.
As an example of a possible implementation, after the fourth completion switching value output module 506 of the BEST small turbine warming system receives the output signal 1 of the fourth and module 505, the fourth completion switching value output module 506 of the BEST small turbine warming system sends a current task completion signal to the fifth pre-warming starting unit 105, and the fifth pre-warming starting unit 105 executes the to-be-executed operation of the unit after receiving the current task completion signal.
In some embodiments of the present application, as shown in fig. 6, the fifth warm-up start unit 105 includes a switching value input module 601 where the temperature of the metal temperature at the left side of the main valve 50% of the BEST small turbine is greater than the third preset temperature, a switching value input module 602 where the temperature of the metal temperature at the right side of the main valve 50% of the BEST small turbine is greater than the third preset temperature, a fifth and module 603, and a fifth switching value output module 604 for completing the warm-up system of the BEST small turbine; wherein: the switching value input module 601 for enabling the temperature of the metal temperature at 50% measuring point on the left side of the main throttle valve of the BEST small steam turbine to be greater than the third preset temperature and the switching value input module 602 for enabling the temperature of the metal temperature at 50% measuring point on the right side of the main throttle valve of the BEST small steam turbine to be greater than the third preset temperature are respectively connected with the input ends of the fifth and module 603; the output end of the fifth and module 603 is connected with a fifth finishing switching value output module 604 of the small turbine warming-up system of BEST.
That is to say, when the temperature of the metal temperature 50% measuring point on the left side of the main valve of the small BEST turbine is higher than the third preset temperature, the output signal of the switching value input module 601, where the temperature of the metal temperature 50% measuring point on the left side of the main valve of the small BEST turbine is higher than the third preset temperature, is 1; when the temperature of the metal temperature 50% measuring point on the right side of the main throttle valve of the small BEST turbine is higher than the third preset temperature, the output signal of the switching value input module 602, where the temperature of the metal temperature 50% measuring point on the right side of the main throttle valve of the small BEST turbine is higher than the third preset temperature, is 1. If the switching value signal output by any of the modules 6 is 0, the output signal of the fifth and module 603 is 0, and the fifth pre-warming starting unit 105 is controlled to adjust and process the module with the output switching value signal of 0 again until the output signal of the fifth and module 603 is 1.
As an example of one possible implementation, after the fifth switching value completion output module 604 of the BEST small turbine warming system receives the output signal 1 of the fifth and module 603, the fifth switching value completion output module 604 of the BEST small turbine warming system sends the current task completion signal to the sixth pre-warming starting unit 106, and the sixth pre-warming starting unit 106 executes the to-be-executed operation of the unit after receiving the current task completion signal.
In some embodiments of the present application, as shown in fig. 7, the sixth warm-up starting unit 106 includes a switching value input module 7011 of TAB of the small BEST turbine in the automatic mode, a switching value input module 7022 of AST oil pressure greater than a second preset threshold, a switching value input module 703 of automatically raising to the second preset threshold of TAB of the small BEST turbine, a sixth and module 704, and a sixth completion switching value output module 705 of the warm-up system of the small BEST turbine; wherein: a switching value input module 701 of the TAB of the BEST small turbine in an automatic mode, a switching value input module 702 of which the AST oil pressure is greater than a second preset threshold value, and a switching value input module 703 of which the oil pressure automatically rises to the second preset threshold value of the TAB of the BEST small turbine are respectively connected with the input ends of a sixth and module 704; the output of the sixth and module 704 is connected to a sixth complete switching value output module 705 of the BEST small turbine warming system.
That is, when the TAB of the small BEST turbine is in the automatic mode, the output signal of the TAB of the small BEST turbine in the switching value input module 701 of the automatic mode is 1; when the AST oil pressure is greater than the second preset threshold, the output signal of the switching value input module 702 where the AST oil pressure is greater than the second preset threshold is 1; when the second preset threshold value of the small BEST turbine TAB is reached, the output signal of the switching value input module 703 to which the second preset threshold value of the small BEST turbine TAB is automatically increased is 1. If the switching value signal output by any of the above modules is 0, the output signal of the sixth and module 704 is 0, and the sixth pre-warming starting unit 106 is controlled again to adjust and process the module with the output switching value signal of 0 until the output signal of the sixth and module 704 is 1.
As an example of a possible implementation, after the sixth completion switching value output module 705 of the BEST small turbine warming system receives the output signal 1 of the sixth sum module 704, the sixth completion switching value output module 705 of the BEST small turbine warming system sends a current task completion signal to the seventh pre-warming starting unit 107, and the seventh pre-warming starting unit 107 executes the operation to be executed of the unit after receiving the current task completion signal.
In some embodiments of the present application, as shown in fig. 8, the seventh pre-warming start unit 107 includes an opening and closing amount input module 801 for fully opening the first main valve and the second main valve of the small BEST turbine, an opening and closing amount input module 802 for fully opening the seventh steam supplementing, overflowing and extracting electric valves, an opening and closing amount input module 803 for fully opening the bypass steam discharging electric valve of the small BEST turbine, an opening and closing amount input module 804 for automatically opening the seventh steam supplementing valve, an opening and closing amount input module 805 for closing the seventh steam supplementing regulating valve, an opening and closing amount input module 806 for fully opening the steam discharging bypass valve of the small BEST turbine, an opening and closing amount input module 807 for quickly closing the solenoid valve of the small BEST turbine and adjusting the bypass valve, a seventh and module 808, and a seventh opening and closing amount output module 809 for completing the warming system of the small BEST turbine; wherein: a first main valve and a second main valve of the BEST small turbine are fully opened, a switching value input module 801, a switching value input module 802, a switching value input module 803 and a switching value input module 804, wherein the first main valve and the second main valve of the BEST small turbine are fully opened, the switching value input module 802 is opened, the bypass steam exhaust electric valve of the BEST small turbine is opened, the switching value input module 804 is automatically switched into a seven steam-supplementing valve, the switching value input module 805 is closed by the seven steam-supplementing adjusting valve, the switching value input module 806 is fully opened by the steam exhaust bypass valve of the BEST small turbine, the bypass valve quick-closing electromagnetic valve of the BEST small turbine is de-energized, and the switching value input module 807, which is adjustable, is respectively connected with the input ends of a seventh and module 808; the output end of the seventh and module 808 is connected with a seventh switching value output module 809 of the BEST small turbine warming system.
That is, when the first main throttle and the second main throttle of the BEST small steam turbine are fully opened, the output signal of the switching value input module 8011 in which the first main throttle and the second main throttle of the BEST small steam turbine are fully opened is 1; when the No. seven steam supplementing, overflowing and steam extracting electric valve is opened, the output signal of the opening and closing quantity input module 802 of the No. seven steam supplementing, overflowing and steam extracting electric valve is 1; when the bypass exhaust electric valve of the BEST small turbine is opened, the output signal of the opening and closing quantity input module 803 of the opened bypass exhaust electric valve of the BEST small turbine is 1; when the seventh steam supplementing valve is automatically put into operation, the output signal of the switching value input module 804 for automatically putting the seventh steam supplementing valve into operation is 1; when the seventh steam compensating regulating valve is closed, the output signal of the switching value input module 805 for closing the seventh steam compensating regulating valve is 1; when the exhaust bypass valve of the BEST small turbine is fully opened, the output signal of the switching value input module 806 for fully opening the exhaust bypass valve of the BEST small turbine is 1; when the bypass valve fast-closing solenoid valve of the small BEST turbine is de-energized and the bypass valve is adjustable, the output signal of the switching value input module 807 of the small BEST turbine fast-closing solenoid valve is de-energized and the bypass valve is adjustable is 1. If the switching value signal output by any of the above modules is 0, the output signal of the seventh and module 808 is 0, and the seventh pre-warming starting unit 107 is controlled again to adjust and process the module with the output switching value signal of 0 until the output signal of the seventh and module 808 is 1.
As an example of a possible implementation, after the seventh completion switching value output module 809 of the BEST small turbine warming system receives the output signal 1 of the seventh and module 808, the seventh completion switching value output module 809 of the BEST small turbine warming system sends a current task completion signal to the eighth pre-warming starting unit 108, and the eighth pre-warming starting unit 108 executes the operation to be executed of the unit after receiving the current task completion signal.
In some embodiments of the present application, as shown in fig. 9, the eighth warm-up starting unit 108 includes an analog input module 901 of the actual rotation speed of the small turbine BEST and an eighth complete switching value output module 903 of the first ratio greater than the module 902 and the warm-up system of the small turbine BEST; wherein: an analog quantity input module 901 of the actual rotating speed of the BEST small steam turbine is connected with an input end of a first module 902 which is larger than the actual rotating speed of the BEST small steam turbine; the output of the first larger than module 902 is connected to an eighth finishing switching value output module 903 of the small turbine warming system of BEST.
That is, when the actual rotation speed of the small turbine in BEST is greater than the first preset rotation speed, the output signal connected to the input terminal of the first larger than module 901 is 1. If the switching value signal output by the analog input module 901 of the actual rotation speed of the small turbine BEST is 0, the first ratio is greater than that of the output signal of the module 902 and is 0, and the eighth pre-warming starting unit 108 is controlled again to adjust and process the module with the output switching value signal of 0 until the output signal of the eighth and module 902 is 1.
As an example of a possible implementation, after the eighth complete switching value output module 903 of the BEST small turbine warming system receives the output signal 1 of the eighth sum module 902, the eighth complete switching value output module 903 of the BEST small turbine warming system sends a current task completion signal to the ninth pre-warming starting unit 109, and the ninth pre-warming starting unit 109 executes an operation to be executed of the unit after receiving the current task completion signal.
In some embodiments of the present application, as shown in fig. 10, the warming-up control unit 109 includes an analog input module 1001 for the metal temperature of the real inner cylinder of the small BEST turbine, a first comparison smaller module 1003, a first delay module 1005, a second comparison larger module 1004, a second delay module 1006, an eighth comparison module 1007, and a ninth switching value output module 1002 for the warming-up system of the small BEST turbine; wherein: an analog quantity input module 1001 for actual inner cylinder metal temperature of the BEST small steam turbine is respectively connected with an input end of a first comparison more than module 1003 and an input end of a second comparison more than module 1004; a first smaller ratio module 1003 and a first larger ratio module 1004 are respectively used for comparing the input quantity of an analog quantity input module 1001 of the BEST small steam turbine real inner cylinder metal temperature with 150 ℃; the output end of the first less than module 1003 is connected with the input end of the first delay module 1005; the output of the second compare greater module 1004 is connected to the input of the second delay module 1006; the output end of the first delay module 1005 and the output end of the second delay module 1006 are respectively connected with the input ends of the eighth and module 1007; the output end of the eighth and module 1007 is connected with a ninth finishing switching value output module 1002 of the BEST small turbine warming system.
That is to say, when the output quantity of the analog quantity input module 1001 of the real inner cylinder metal temperature of the small turbine BEST is less than 150 ℃, the first ratio is less than the output quantity of the module 1003 and is 1, and the first ratio is greater than the output quantity of the module 1004 and is 0, the real inner cylinder metal temperature of the small turbine BEST is continuously increased for 30min; when the output quantity of the analog quantity input module 1001 of the BEST small steam turbine real inner cylinder metal temperature is greater than 150 ℃, the first ratio is 0 in output quantity of the module 1003, the first ratio is 1 in output quantity of the module 1004, and then the BEST small steam turbine real inner cylinder metal temperature is kept for 10min in a state of being greater than 150 ℃. When the output of any one of the first larger than module 1004 and the first smaller than module 1003 is 1, the output of the eighth and module 1007 is 1. At this time, the small turbine warm-up operation of BEST is completed.
In some embodiments of the present application, the first predetermined temperature is 42 ℃; the first preset threshold is 105%; the first preset rotating speed is 100r/min; the second preset temperature is 30 ℃; the third preset temperature is 150 ℃; the second preset threshold is 62.5%; the first preset rotation speed is 999r/min.
According to the BEST small steam turbine pre-warming starting control system, through the system characteristics and the operation parameters of the BEST small steam turbine, the control strategy of the BEST small steam turbine pre-warming starting is optimized and perfected by combining the debugging result of the BEST small steam turbine during debugging, and the operation characteristics of the BEST small steam turbine are combined, so that the BEST small steam turbine pre-warming starting control strategy scheme is provided, the BEST small steam turbine is successfully warmed up, the rotating speed of the BEST small steam turbine reaches 1000r/min, and a solid foundation is laid for the next BEST small steam turbine starting process. In addition, the function of self-starting and pre-warming of the BEST small turbine is realized, the application of an automatic control technology is completely realized, the workload of operators is reduced, and the labor force is released.
In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," 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 are not necessarily intended to 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. Moreover, various embodiments or examples and features of various embodiments or examples described in this specification can be combined and combined by one skilled in the art without being mutually inconsistent.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
It should be understood that portions of the present application may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. If implemented in hardware as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present application may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a separate product, may also be stored in a computer-readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc. While embodiments of the present application have been shown and described above, it will be understood that the above embodiments are exemplary and should not be construed as limiting the present application and that changes, modifications, substitutions and alterations in the above embodiments may be made by those of ordinary skill in the art within the scope of the present application.
Claims (11)
- BEST small steam turbine pre-warm start control system, characterized in that the system comprises:the first pre-warming starting unit is used for respectively controlling the valve group interlocking input of the BEST small turbine, respectively controlling the full closing of a first main valve and a second main valve of the BEST small turbine, respectively controlling the full closing of a first regulating valve and a second regulating valve of the BEST small turbine, and controlling the full closing of a second steam extraction check valve, a third steam extraction check valve, a fourth steam extraction check valve, a fifth steam extraction check valve, a sixth steam extraction check valve and a seventh steam extraction check valve of the BEST small turbine;the second pre-warming starting unit is used for controlling the first AST electromagnetic valve, the second AST electromagnetic valve and the third AST electromagnetic valve to be electrified and controlling the feed pump to start after the running state of the oil system of the BEST small steam turbine is determined to meet the preset requirement;the third pre-warming starting unit is used for controlling the opening of a first-gate front drain valve and a second-gate front drain valve of the BEST small turbine, controlling the opening of a first-gate rear drain valve and a second-gate rear drain valve of the BEST small turbine, controlling the opening of a second-gate steam extraction drain valve, a third-gate steam extraction drain valve, a fourth-gate steam extraction drain valve, a fifth-gate steam extraction drain valve, a sixth-gate steam extraction drain valve and a seventh-gate steam extraction drain valve, controlling the full closing of a seventh-gate steam extraction check valve, controlling the full closing of a first main gate and a second main gate of the BEST small turbine, controlling the full closing of the first-gate and the second-gate of the BEST small turbine, controlling the closing of an overflow regulating valve and a check valve of the BEST small turbine, controlling the closing of a seventh-up air-supplement regulating valve and controlling the full opening of an exhaust valve of the BEST small turbine;the fourth pre-warming starting unit is used for determining whether the temperature difference between an upper cylinder and a lower cylinder is smaller than a first preset temperature, determining whether a first gate regulating valve limit and a second gate regulating valve limit of BEST are both larger than a first preset threshold, determining whether the actual rotating speed of a BEST small turbine is larger than a first preset rotating speed, and determining whether the superheat degree of main valve steam of the BEST small turbine is larger than a second preset temperature;the fifth pre-warming starting unit is used for determining whether the temperature of a point for measuring the metal temperature of 50% at the left side of the main throttle valve and the temperature of a point for measuring the metal temperature of 50% at the left side of the main throttle valve are both greater than a third preset temperature;a sixth pre-warm start unit for determining whether the TAB value is greater than a second preset threshold, and determining whether the AST oil pressure is greater than the second preset threshold;the seventh pre-warming starting unit is used for controlling the first main valve and the second main valve of the BEST small turbine to be fully opened, controlling the seventh steam supplementing valve, the overflow valve and the steam extraction electric valve to be opened, controlling the bypass steam exhaust electric valve of the BEST small turbine to be opened, controlling the seventh steam supplementing valve to be automatically put into operation, controlling the seventh steam supplementing adjusting valve to be closed, controlling the steam exhaust bypass valve of the BEST small turbine to be fully opened, and controlling the bypass valve to be quickly closed to be de-energized;the eighth pre-warming starting unit is used for determining whether the rotating speed of the BEST small turbine is greater than the first preset rotating speed or not;and the warm-up control unit is used for controlling the BEST small turbine to execute warm-up operation.
- 2. The system according to claim 1, wherein the first pre-warming starting unit comprises a switching value input module of a first valve group interlock input of a BEST small turbine, a switching value input module of a second valve group interlock input of the BEST small turbine, a switching value input module of a first main valve full close of the BEST small turbine, a switching value input module of a second main valve full close of the BEST small turbine, a switching value input module of a first regulating valve full close of the BEST small turbine, a switching value input module of a second steam extraction check valve to a seventh steam extraction check valve of the BEST small turbine, a first AND module and a first completion switching value output module of the BEST small turbine warming system; wherein:the switching value input module of the first valve group interlocking input of the BEST small turbine, the switching value input module of the second valve group interlocking input of the BEST small turbine, the switching value input module of the first main valve full close of the BEST small turbine, the switching value input module of the second main valve full close of the BEST small turbine, the switching value input module of the first regulating valve full close of the BEST small turbine, the switching value input module of the second regulating valve full close of the BEST small turbine, and the switching value input modules of the second steam extraction check valve to the seventh steam extraction check valve of the BEST small turbine, wherein the valve positions of the second steam extraction check valve to the seventh steam extraction check valve are all less than 5 percent and are respectively connected with the input ends of the first and second modules;and the output end of the first and module is connected with a first switching value output module for finishing the warming system of the BEST small turbine.
- 3. The system of claim 1, wherein the second pre-warming start-up unit includes a switching value input module in which oil pressure of the small BEST turbine is normal, a switching value input module in which a feed pump is allowed to start, a switching value input module in which a first AST solenoid valve is electrified, a switching value input module in which a second AST solenoid valve is electrified, a switching value input module in which a third AST solenoid valve is electrified, a second and module, and a second completion switching value output module of the small BEST turbine warming-up system; wherein:the switching value input module with normal oil pressure of the BEST small steam turbine, the switching value input module allowing the water feeding pump to be started, the switching value input module with the electrified first AST electromagnetic valve, the switching value input module with the electrified second AST electromagnetic valve and the switching value input module with the electrified third AST electromagnetic valve are respectively connected with the input ends of the second and module;and the output end of the second and module is connected with a second switching value output module for finishing the warming system of the BEST small turbine.
- 4. The system according to claim 1, wherein the third pre-warming starting unit comprises a switching value input module for opening a first-number gate-opened front drain valve of the BEST small turbine, a switching value input module for opening a second-number gate-opened front drain valve of the BEST small turbine, a switching value input module for opening a first-number gate-opened rear drain valve of the BEST small turbine, a switching value input module for opening a second-number gate-opened rear drain valve of the BEST small turbine, a switching value input module for opening all of second-number to seventh-number steam extraction drain valves of the BEST small turbine, a switching value input module for opening all of a seventh-number steam extraction check valve of the BEST small turbine with the opening of less than 3%, a switching value input module for closing a first-number main valve and a 2 main valve of the BEST small turbine, a switching value input module for opening all of the first-number gate and the 2 gate-opened rear drain valve of the BEST small turbine, a switching value input module for closing all of an overflow regulating valve and the check valve of the BEST small turbine, a switching value input module for closing all of the BEST small turbine, a switching value input module for closing the seventh-number low-number steam extraction check valve and a bypass valve of the BEST small turbine, a third-opened small turbine, and a third-opened small turbine warming and a warming and warming up system; wherein:the switching value input module for opening a first steam trap of the BEST small steam turbine, the switching value input module for opening a second steam trap of the BEST small steam turbine, the switching value input module for fully opening a second steam trap to a seventh steam extraction steam trap of the BEST small steam turbine, the switching value input module for fully closing a first main steam valve and a 2 main steam valve of the BEST small steam turbine, the switching value input module for fully closing a first steam trap and a 2 throttle trap of the BEST small steam turbine, the switching value input module for fully closing an overflow regulating valve and a check valve of the BEST small steam turbine, the switching value input module for fully closing a seven low plus regulating valve of the BEST small steam turbine, and the switching value input module for fully opening a fully discharge bypass valve of the BEST small steam turbine are respectively connected with the input end of the third steam trap and the third steam trap;and the third finishing switching value output module of the BEST small turbine warming system at the output end of the third and module is connected.
- 5. The system of claim 1, the fourth pre-warming starting unit comprises a switching value input module, a switching value output module and a switching value output module, wherein the switching value input module is used for inputting the switching value of the BEST small turbine, the temperature difference between an upper cylinder and a lower cylinder of the BEST small turbine is smaller than a first preset temperature, the switching value input module is used for inputting the switching value of a first switching valve and a second switching valve of the BEST small turbine, and the threshold value of the first switching valve and the second switching valve is larger than a first preset threshold value the switching value input module is used for inputting the actual rotating speed of the BEST small turbine to be greater than a first preset rotating speed, the switching value input module is used for inputting the superheat degree of main valve steam of the BEST small turbine to be greater than a second preset temperature, the fourth AND module is used for outputting the fourth switching value finishing module of the BEST small turbine warming system; wherein:the switching value input module of which the temperature difference between an upper cylinder and a lower cylinder of the BEST small turbine is less than a first preset temperature, the switching value input module of which the first switching valve and the second switching valve of the BEST small turbine are more than a first preset threshold value, the switching value input module of which the actual rotating speed is more than a first preset rotating speed and the switching value input module of which the main valve steam superheat degree is more than a second preset temperature are respectively connected with the input ends of the fourth and the fourth modules;and the output end of the fourth and module is connected with a fourth switching value output module for completing the warming system of the BEST small turbine.
- 6. The system according to claim 1, wherein the fifth pre-warming starting unit comprises a switching value input module of which the temperature of the metal temperature 50% measured point on the left side of the main valve of the BEST small turbine is greater than a third preset temperature, a switching value input module of which the temperature of the metal temperature 50% measured point on the right side of the main valve of the BEST small turbine is greater than the third preset temperature, a fifth AND module and a fifth completion switching value output module of the BEST small turbine warming-up system; wherein:the switching value input module of which the temperature of a metal temperature 50% measuring point at the left side of a main throttle valve of the BEST small steam turbine is greater than a third preset temperature and the switching value input module of which the temperature of a metal temperature 50% measuring point at the right side of the main throttle valve of the BEST small steam turbine is greater than the third preset temperature are respectively connected with the input ends of the fifth and the fifth modules;and the output end of the fifth and module is connected with a fifth switching value output module for finishing the warming system of the BEST small turbine.
- 7. The system of claim 1, wherein the sixth warm start unit comprises a switching value input block of TAB in automatic mode of the small turbine BEST, a switching value input block of AST oil pressure greater than a second preset threshold, a switching value input block automatically rising to the second preset threshold of TAB of the small turbine BEST, a sixth and block, and a sixth completion switching value output block of the small turbine BEST warming system; wherein:the switching value input module of the TAB of the BEST small turbine in an automatic mode, the switching value input module of the AST oil pressure which is larger than a second preset threshold value and the switching value input module which is automatically increased to the second preset threshold value of the TAB of the BEST small turbine are respectively connected with the input end of the sixth and module;and the output end of the sixth and module is connected with a sixth switching value output module for finishing the warming system of the BEST small turbine.
- 8. The system according to claim 1, wherein the seventh pre-warm start unit comprises a switching value input module in which a first main valve and a second main valve of the BEST small turbine are fully opened, a switching value input module in which a seventh steam supplementing, overflowing and extracting electric valve is opened, a switching value input module in which a bypass steam exhaust electric valve of the BEST small turbine is opened, a switching value input module in which the seventh steam supplementing valve is put into operation automatically, a switching value input module in which the seventh steam supplementing regulating valve is closed, a switching value input module in which an exhaust bypass valve of the BEST small turbine is fully opened, a switching value input module in which a solenoid valve of the BEST small turbine is quickly closed and the bypass valve is adjusted, a seventh and module, and a seventh completion switching value output module of the warm-up system of the BEST small turbine; wherein:the input module of the switching value of the first main valve and the second main valve of the BEST small steam turbine, the input module of the switching value of the opened seven-number steam supplementing, overflowing and steam extracting electric valve, the input module of the switching value of the opened bypass steam exhaust electric valve of the BEST small steam turbine and the input module of the switching value of the seven-number steam supplementing valve which is automatically put into use are respectively connected with the input ends of the seventh and the module;and the output end of the seventh and module is connected with a seventh switching value output module for completing the warming system of the BEST small turbine.
- 9. The system of claim 1, wherein the eighth pre-warming startup unit comprises an analog input module of the actual speed of the small BEST turbine and an eighth finishing switching value output module of the first larger than module and the small BEST turbine warming system; wherein:the analog quantity input module of the actual rotating speed of the BEST small turbine is connected with the input end of the first larger-ratio module;and the output end of the first larger-ratio module is connected with an eighth finishing switching value output module of the BEST small turbine warming system.
- 10. The system according to claim 1, wherein the warming-up control unit comprises an analog quantity input module of the metal temperature of the real inner cylinder of the BEST small steam turbine, a first proportion smaller than module, a first delay module, a second proportion larger than module, a second delay module, an eighth AND module and a ninth finishing switching quantity output module of the warming-up system of the BEST small steam turbine; wherein:the analog quantity input module of the actual inner cylinder metal temperature of the BEST small steam turbine is respectively connected with the input end of the first comparison larger module and the input end of the second comparison larger module; the first less than module and the first more than module are respectively used for comparing the input quantity of the analog quantity input module of the BEST small steam turbine solid inner cylinder metal temperature with 150 ℃;the output end of the first delay module is connected with the input end of the first delay module;the output end of the second comparison greater module is connected with the input end of the second delay module;the output end of the first delay module and the output end of the second delay module are respectively connected with the input ends of the eighth and module;and the output end of the eighth and module is connected with a ninth finishing switching value output module of the BEST small steam turbine warming system.
- 11. The system of claim 1, wherein the first preset temperature is 42 ℃; the first preset threshold is 105%; the first preset rotating speed is 100r/min; the second preset temperature is 30 ℃; the third preset temperature is 150 ℃; the second preset threshold is 62.5%; the first preset rotating speed is 999r/min.
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