CN115234310B - Pre-heating starting control system of BEST small steam turbine - Google Patents

Pre-heating starting control system of BEST small steam turbine Download PDF

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Publication number
CN115234310B
CN115234310B CN202211032347.5A CN202211032347A CN115234310B CN 115234310 B CN115234310 B CN 115234310B CN 202211032347 A CN202211032347 A CN 202211032347A CN 115234310 B CN115234310 B CN 115234310B
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valve
switching value
turbine
module
input module
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CN115234310A (en
Inventor
吴青云
谭祥帅
何洋
王海涛
高玉峰
刘世雄
高景辉
杨博
何胜
高奎
郭云飞
张灏
李昭
蔺奕存
赵如宇
王涛
姚智
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Xian Thermal Power Research Institute Co Ltd
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Xian Thermal Power Research Institute Co Ltd
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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

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Turbines (AREA)

Abstract

The application relates to a BEST small steam turbine preheating starting control system. The system comprises: the first pre-heating starting unit, the second pre-heating starting unit, the third pre-heating starting unit, the fourth pre-heating starting unit, the fifth pre-heating starting unit, the sixth pre-heating starting unit, the seventh pre-heating starting unit, the eighth pre-heating starting unit and the warming-up control unit are used for optimizing and perfecting a control strategy of pre-heating starting of the BEST small turbine and controlling the BEST small turbine to execute warming-up operation. The self-starting preheating function of the BEST small steam turbine is realized, the workload of operators is reduced, and the labor force is released.

Description

Pre-heating starting control system of BEST small steam turbine
Technical Field
The application relates to the field of intelligent control of a small BEST turbine with a small generator of an ultra-supercritical double reheat coal-fired unit, in particular to a preheating starting control system of the small BEST turbine.
Background
In the related technology, the million-type BEST small turbine thermal power generating unit with a small generator has the advantages of energy conservation and high efficiency, and has great success in the field of power generation in China.
Because the BEST small steam turbine is always in a fuzzed and researched state in the starting pre-heating stage, a large amount of operation data and experiments are required to perfect and optimize the pre-heating starting sequence control, and the pre-heating starting control of the BEST small steam turbine is mainly realized through manual control. Therefore, the preheating starting control system of the small BEST turbine is obtained by combining a multi-year debugging technology and a large number of preheating starting tests, and the small BEST turbine can be automatically started, so that the application of an automatic control technology is realized, the workload of operators is reduced, and the labor force is released.
Disclosure of Invention
To this end, the present application provides a BEST small turbine pre-warm start 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-heating starting unit is used for respectively controlling the interlocking input of valve groups of the BEST small steam turbines, respectively controlling the total closing of a first main valve and a second main valve of the BEST small steam turbines, respectively controlling the total closing of a first valve and a second valve of the BEST small steam turbines, and respectively controlling the total closing of a second extraction check valve, a third extraction check valve, a fourth extraction check valve, a fifth extraction check valve, a sixth extraction check valve and a seventh extraction check valve of the BEST small steam turbines;
the second preheating 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 water supply pump to start after determining that the running state of the oil system of the BEST small steam turbine meets the preset requirement;
the third pre-heating starting unit is used for controlling the opening of a first-valve front drain valve and a second-valve front drain valve of the small BEST turbine, controlling the opening of a first-valve rear drain valve and a second-valve rear drain valve of the small BEST turbine, controlling the opening of a second-valve steam extraction drain valve, a third-valve steam extraction drain valve, a fourth-valve steam extraction drain valve, a fifth-valve steam extraction drain valve, a sixth-valve steam extraction drain valve and a seventh-valve steam extraction drain valve, controlling the full closing of a seventh-valve extraction check valve, controlling the full closing of a first main valve and a second main valve of the small BEST turbine, controlling the full closing of a first-valve and a second-valve of the small BEST turbine, controlling the closing of an overflow regulating valve and a check valve of the small BEST turbine, controlling the closing of a seventh-valve low-adding air-supplementing regulating valve and controlling the full opening of a steam exhaust bypass valve of the small BEST turbine;
The fourth preheating 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 the first valve regulating limit and the second valve regulating limit of the BEST are both larger than the 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 main valve steam superheat degree of the BEST small turbine is larger than a second preset temperature;
the fifth preheating starting unit is used for determining whether the temperature of a 50% measuring point of the metal temperature at the left side of the main valve and the temperature of a 50% measuring point of the metal temperature at the left side of the main valve are both greater than a third preset temperature;
a sixth pre-heating starting unit, configured to determine whether the TAB value is greater than a second preset threshold value, and determine whether the AST oil pressure is greater than the second preset threshold value;
the seventh preheating starting unit is used for controlling the full opening of the first main valve and the second main valve of the BEST small turbine, controlling the opening of the seventh steam supplementing valve, the overflow valve and the steam extraction electric valve, controlling the opening of the bypass steam exhaust electric valve of the BEST small turbine, controlling the automatic input of the seventh steam supplementing valve, controlling the closing of the seventh steam supplementing regulating valve, controlling the full opening of the steam exhaust bypass valve of the BEST small turbine and controlling the quick power-off electromagnetic valve of the bypass valve;
an eighth preheating starting unit, which is used for determining whether the rotating speed of the BEST small turbine is larger than a first preset rotating speed;
And the warming-up control unit is used for controlling the BEST small steam turbine to perform warming-up operation.
According to one embodiment of the present application, the first pre-heating starting unit includes a switching value input module for interlocking input of a first valve bank of the BEST small turbine, a switching value input module for interlocking input of a second valve bank of the BEST small turbine, a switching value input module for fully closing a first main valve of the BEST small turbine, a switching value input module for fully closing a second main valve of the BEST small turbine, a switching value input module for fully closing a first tuning valve of the BEST small turbine, a switching value input module for fully closing a second tuning valve of the BEST small turbine, a switching value input module for which valve positions from a second extraction check valve to a seventh extraction check valve of the BEST small turbine are all less than 5%, a first and a second modules, and a first completion switching value output module of a BEST small turbine warmup system; wherein:
the device comprises a first valve group interlocking input switching value input module of a BEST small turbine, a second valve group interlocking input switching value input module of the BEST small turbine, a first main valve totally closed switching value input module of the BEST small turbine, a second main valve totally closed switching value input module of the BEST small turbine, a first valve totally closed switching value input module of the BEST small turbine, a second valve totally closed switching value input module of the BEST small turbine, and switching value input modules from a second extraction check valve to a seventh extraction check valve of the BEST small turbine, wherein valve positions of the switching value input modules are less than 5% respectively;
The output end of the first AND module is connected with a first switch-value output module of the BEST small turbine warming-up system.
According to one embodiment of the present application, the second preheating starting unit includes a normal oil pressure switching value input module of the BEST small turbine, a switching value input module of a water supply pump which allows starting, a switching value input module of a first AST solenoid valve which is electrified, a switching value input module of a second AST solenoid valve which is electrified, a switching value input module of a third AST solenoid valve which is electrified, a second and module and a second finishing switching value output module of a BEST small turbine warming-up system; wherein:
the hydraulic normal switching value input module of the BEST small turbine, the switching value input module of the water supply pump which is allowed to start, the switching value input module of the first AST electromagnetic valve which is electrified, the switching value input module of the second AST electromagnetic valve which is electrified, and the switching value input module of the third AST electromagnetic valve which is electrified are respectively connected with the input ends of the second and the modules;
and the output end of the second AND module is connected with a second finishing switching value output module of the BEST small turbine warming-up system.
According to an embodiment of the present application, the third pre-heating starting unit includes a switching value input module for opening a drain valve before a first valve of the BEST small turbine, a switching value input module for opening a drain valve before a second valve of the BEST small turbine, a switching value input module for opening a drain valve after the first valve of the BEST small turbine, a switching value input module for opening a drain valve after the second valve of the BEST small turbine, a switching value input module for fully opening a drain valve from the second valve of the BEST small turbine to the seventh valve, a switching value input module for fully closing a main valve and a main valve of the BEST small turbine with a seventh extraction valve opening less than 3%, a switching value input module for fully closing a first valve and a main valve of the BEST small turbine with a main valve of the BEST small turbine, a switching value input module for fully closing an overflow regulating valve and a check valve of the BEST small turbine with a main valve of the BEST small turbine, a switching value input module for fully closing a seven low-heating air-supply regulating valve of the BEST small turbine, a switching value input module for fully opening a bypass valve of the BEST small turbine, and a third system for completing the third system and the third module; wherein:
The device comprises a switching value input module for opening a drain valve before a first valve of a small BEST turbine, a switching value input module for opening a drain valve before a second valve of the small BEST turbine, a switching value input module for opening a drain valve after the first valve of the small BEST turbine, a switching value input module for opening a drain valve after the second valve of the small BEST turbine, a switching value input module for completely opening two to seven steam extraction drain valves of the small BEST turbine, a switching value input module for completely controlling the switching value of the drain valve of the small BEST turbine, a switching value input module for controlling the switching value of the drain valve of the small BEST turbine the opening degree of the seventh extraction check valve of the BEST small turbine is smaller than 3%, the opening degree of the first main valve and the second main valve of the BEST small turbine is totally closed, the overflow regulating valve and the check valve of the BEST small turbine are totally closed, the opening degree of the seventh low-pressure air supplementing regulating valve of the BEST small turbine is totally closed, and the opening degree of the BEST small turbine is totally opened;
and the output end BEST small steam turbine warming-up system of the third AND module is connected with a third finishing switching value output module.
According to one embodiment of the present application, the fourth preheating starting unit includes a switching value input module of the BEST small turbine with a temperature difference between an upper cylinder and a lower cylinder smaller than a first preset temperature, a switching value input module of the BEST small turbine with a first and a second valve threshold larger than a first preset threshold, a switching value input module of the BEST small turbine with an actual rotation speed larger than the first preset rotation speed, a switching value input module of the BEST small turbine with a main valve steam superheat degree larger than a second preset temperature, a fourth and a fourth finishing switching value output module of the BEST small turbine warming-up system; wherein:
The switching value input module of which the temperature difference between the upper cylinder and the lower cylinder of the BEST small turbine is smaller than a first preset temperature, the switching value input module of which the first switching value and the second switching value of the BEST small turbine are larger than a first preset threshold, the switching value input module of which the actual rotating speed of the BEST small turbine is larger than the first preset rotating speed, and the switching value input module of which 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 the fourth modules;
and the output end of the fourth AND module is connected with a fourth finishing switching value output module of the BEST small turbine warming-up system.
According to one embodiment of the present application, the fifth pre-heating starting unit includes a switching value input module where the temperature of a 50% measuring point of the metal temperature 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 where the temperature of the metal temperature on the 50% measuring 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 50% measuring point of the metal temperature on the left side of the main valve of the BEST small turbine is greater than a third preset temperature and the switching value input module of which the temperature of a 50% measuring point of the metal temperature on the right side of the main valve of the BEST small turbine is greater than the third preset temperature are respectively connected with the input ends of the fifth and module;
And the output end of the fifth AND module is connected with a fifth finishing switching value output module of the BEST small turbine warming-up system.
According to one embodiment of the present application, the sixth preheating starting unit includes a switching value input module of TAB of the BEST small turbine in an automatic mode, a switching value input module of AST oil pressure greater than a second preset threshold, a switching value input module of TAB of the BEST small turbine automatically rising to the second preset threshold, a sixth and module, and a sixth completion switching value output module of the BEST small turbine warming-up system; wherein:
the TAB of the BEST small turbine is respectively connected with the input ends of the sixth and the modules in an automatic mode, an on-off input module with AST oil pressure larger than a second preset threshold value and an on-off input module with the TAB of the BEST small turbine automatically raised to the second preset threshold value;
and the output end of the sixth AND module is connected with a sixth finishing switching value output module of the BEST small steam turbine warming-up system.
According to one embodiment of the present application, the seventh pre-heating starting unit includes a full-open switching value input module of a first main valve and a second main valve of the BEST small turbine, a full-open switching value input module of a seventh steam-supplementing, overflow and steam-extracting electric valve, a full-open switching value input module of a bypass steam-exhausting electric valve of the BEST small turbine, a full-open switching value input module of a seventh steam-supplementing adjusting valve, a full-open switching value input module of a steam-exhausting bypass valve of the BEST small turbine, a fast-closing switching value input module of a bypass valve of the BEST small turbine, an adjustable switching value input module of a bypass valve, a seventh and module, and a seventh complete switching value output module of a BEST small turbine warming-up system; wherein:
The automatic switching value input module is used for switching the first main valve and the second main valve of the BEST small turbine, the switching value input module for switching the bypass exhaust electric valve of the BEST small turbine, the switching value input module for switching the seventh steam compensating valve on, the switching value input module for switching the seventh steam compensating valve off, the switching value input module for switching the exhaust bypass valve of the BEST small turbine, the switching value input module for switching the bypass valve of the BEST small turbine off and switching value adjustable by the bypass valve are respectively connected with the input ends of the seventh and the seventh modules;
and the output end of the seventh AND module is connected with a seventh finishing switching value output module of the BEST small steam turbine warming-up system.
According to one embodiment of the application, the eighth preheating starting unit comprises an analog input module of the actual rotating speed of the BEST small turbine, a first comparison and larger module and an eighth finishing switching value output module of the BEST small turbine warming-up system; wherein:
the analog input module of the actual rotating speed of the BEST small turbine is connected with the input end of the first comparison module;
the output end of the first comparison module is connected with an eighth finishing switching value output module of the BEST small turbine warming-up system.
According to one embodiment of the application, the warming-up control unit comprises an analog input module of the actual inner cylinder metal temperature of the BEST small turbine, a first comparison smaller module, a first delay module, a second comparison larger module, a second delay module, an eighth and module and a ninth finishing switching value output module of the BEST small turbine warming-up system; wherein:
the analog quantity input module of the real inner cylinder metal temperature of the BEST small steam turbine is respectively connected with the input end of the first comparison smaller than module and the input end of the second comparison larger than module; the first comparison smaller module and the first comparison larger module are respectively used for comparing the input quantity of the analog quantity input module of the real inner cylinder metal temperature of the BEST small steam turbine with 150 ℃;
the output end of the first comparison smaller module is connected with the input end of the first delay module;
the output end of the second comparison larger 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 modules;
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-up system.
According to one 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 brings the following beneficial effects:
the system characteristics and the operation parameters of the BEST small turbine are combined with the debugging results of the BEST small turbine during the debugging period to optimize and perfect the control strategy of the BEST small turbine for pre-warming start, and the scheme of the BEST small turbine for pre-warming start control strategy is provided in combination with the operation characteristics of the BEST small turbine, so that the BEST small turbine is successfully warmed up and the rotating speed of the BEST small turbine reaches 1000r/min, and a solid foundation is laid for the next BEST small turbine starting process. In addition, the self-starting and pre-heating function of the BEST small steam 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 application and together with the description, serve to explain the principles of the application and do not constitute an undue limitation on 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 start-up unit according to an embodiment of the present application;
FIG. 3 is a schematic diagram of a second pre-warm start-up unit according to an embodiment of the present application;
FIG. 4 is a schematic diagram of a third pre-warm start-up unit according to an embodiment of the present application;
FIG. 5 is a schematic diagram of a fourth pre-warm start-up unit according to an embodiment of the present application;
FIG. 6 is a schematic structural diagram of a fifth pre-warm start-up unit in an embodiment of the present application;
FIG. 7 is a schematic diagram of a sixth pre-warm start-up unit according to an embodiment of the present application;
FIG. 8 is a schematic structural view of a seventh pre-warm start-up unit in an embodiment of the present application;
FIG. 9 is a schematic structural view of an eighth pre-warm start-up unit in an embodiment of the present application;
fig. 10 is a schematic structural view of a warming-up control unit in the embodiment of the present application;
Fig. 11 is a schematic structural diagram of a BEST small turbine driven generator in an embodiment of the present application.
Reference numerals
1. A first main valve; 2. a second main valve; 3. a first main steam regulating 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 sixth steam extraction electric valve; 10. a seventh extraction check valve; 11. seventh 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 supplementing valve; 17. a BEST small turbine; 18. a generator; 19. a current transformer.
Detailed Description
In order to enable those skilled in the art to better understand the technical solutions of the present application, 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 the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the present application described herein may be implemented in sequences other than those illustrated or otherwise described herein. The implementations described in the following exemplary examples are not representative of all implementations consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present application as detailed in the accompanying claims.
Based on the system characteristics and the operation parameters of the BEST small turbine, the control strategy of the BEST small turbine pre-warming start is optimized and perfected by combining the debugging results of the BEST small turbine during the debugging period, and the scheme of the BEST small turbine pre-warming start control strategy is provided by combining the operation characteristics of the BEST small turbine, so that the BEST small turbine is successfully warmed up and the rotating speed of the BEST small turbine reaches 1000r/min, and a solid foundation is laid for the next BEST small turbine start process.
As shown in fig. 11, the BEST small turbine 17 is connected to the generator 18 through a transmission shaft, the generator 18 is connected to the converter 19, the BEST small turbine 17 is connected to the steam source through two steam input pipes, one of which is provided with the first main valve 1 and the first main valve 3, and the other of which is provided with the second main valve 2 and the second main valve 4. The seventh steam extraction outlet of the BEST steam turbine 17 is sequentially connected with a seventh steam extraction check valve 10, a seventh steam extraction electric valve 11 and a steam extraction header 12 through pipelines, the steam extraction header 12 is respectively connected with a steam source, a condenser, a eighth low-pressure valve and a seventh low-pressure valve through pipelines, an overflow valve 15 pipeline stop valve 13 and an overflow valve 15 are connected on the pipelines between the steam extraction header 12 and the eighth low-pressure valve, a bypass valve 14 is connected on the pipelines between the steam extraction header 12 and the condenser, a steam supplementing valve 16 is connected on the pipelines between the steam extraction header 12 and the steam source, 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 of the BEST steam turbine 17 are respectively provided with a second main steam extraction 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 system for controlling the pre-warm start of a small BEST turbine in an embodiment of the present application.
As shown in fig. 1, the BEST small turbine pre-heating start control system includes a first pre-heating start unit 101, a second pre-heating start unit 102, a third pre-heating start unit 103, a fourth pre-heating start unit 104, a fifth pre-heating start unit 105, a sixth pre-heating start unit 106, a seventh pre-heating start unit 107, an eighth pre-heating start unit 108, and a warm machine control unit 109.
The first preheating starting unit 101 is used for respectively controlling the interlocking input of valve groups of the BEST small steam turbine, respectively controlling the total closing of a first main valve and a second main valve of the BEST small steam turbine, respectively controlling the total closing of a first valve and a second valve of the BEST small steam turbine, and respectively controlling the total closing of a second extraction check valve, a third extraction check valve, a fourth extraction check valve, a fifth extraction check valve, a sixth extraction check valve and a seventh extraction check valve of the BEST small steam turbine;
the second preheating 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 water supply pump to start after determining that the running state of the oil system of the BEST small steam turbine meets the preset requirement;
The third pre-heating starting unit 103 is used for controlling the opening of a first pre-valve drain valve and a second pre-valve drain valve of the small BEST steam turbine, the opening of a first post-valve drain valve and a second post-valve drain valve of the small BEST steam turbine, 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, the full closing of a seventh steam extraction check valve, the full closing of a first main valve and a second main valve of the small BEST steam turbine, the full closing of a first valve and a second valve of the small BEST steam turbine, the closing of an overflow regulating valve and a check valve of the small BEST steam turbine, the closing of a seventh low-pressure adding and air supplementing regulating valve and the full opening of a steam exhaust bypass valve of the small BEST steam turbine;
a fourth preheating starting unit 104, configured to determine whether the temperature difference between the upper cylinder and the lower cylinder is less than a first preset temperature, determine whether the first threshold and the second threshold of the BEST are both greater than the first preset threshold, determine whether the actual rotation speed of the BEST small turbine is greater than the first preset rotation speed, and determine whether the main valve steam superheat degree of the BEST small turbine is greater than a second preset temperature;
a fifth pre-heating starting unit 105, configured to determine whether the temperature of the 50% metal temperature measuring point on the left side of the main valve and the temperature of the 50% metal temperature measuring point on the left side of the main valve 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 value, and determining whether the AST oil pressure is greater than the second preset threshold value;
a seventh preheating starting unit 107, configured to control the first main valve and the second main valve of the BEST small turbine to be fully opened, control the seventh steam supplementing valve, the overflow valve and the steam extraction electric valve to be opened, control the bypass steam exhaust electric valve of the BEST small turbine to be opened, control the seventh steam supplementing valve to be put into operation automatically, control the seventh steam supplementing adjusting valve to be closed, control the steam exhaust bypass valve of the BEST small turbine to be fully opened, and control the bypass valve to be quickly powered off;
an eighth pre-heating start-up unit 108 for determining whether the rotational speed of the BEST small turbine is greater than a first preset rotational speed;
a warm-up control unit 109 for controlling the BEST steam turbine to perform a warm-up operation.
In some embodiments of the present application, as shown in fig. 2, the first pre-heating starting unit 101 includes a switching value input module 201 for interlocking input of a first valve group of the BEST small turbine, a switching value input module 202 for interlocking input of a second valve group of the BEST small turbine, a switching value input module 203 for fully closing a first main valve of the BEST small turbine, a switching value input module 204 for fully closing a second main valve of the BEST small turbine, a switching value input module 205 for fully closing a first valve of the BEST small turbine, a switching value input module 206 for fully closing a second valve of the BEST small turbine, a switching value input module 207 for valve positions from a second extraction check valve to a seventh extraction check valve of the BEST small turbine, a first and module 209, and a first completion switching value output module 208 of a BEST small turbine warming-up system; wherein: the input module 201 of the switching value of the first valve group interlock input of the BEST small turbine, the input module 202 of the switching value of the second valve group interlock input of the BEST small turbine, the input module 203 of the first main valve totally closed of the BEST small turbine, the input module 204 of the second main valve totally closed of the BEST small turbine, the input module 205 of the first valve totally closed of the BEST small turbine, the input module 206 of the second valve totally closed of the BEST small turbine, and the input module 207 of the switching value from the second extraction check valve to the seventh extraction check valve of the BEST small turbine, wherein the valve positions of the second extraction check valve to the seventh extraction check valve are less than 5%, are respectively connected with the input ends of the first and module 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-up 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 valve group I of the small BEST turbine is in the interlocking input state, the output signal of the switching value input module 201 for interlocking input of the valve group I of the small BEST turbine is 1; when the interlocking of the second valve bank of the small BEST turbine is in the input state, the output signal of the switching value input module 202 for the interlocking input of the second valve bank of the small BEST turbine is 1; when the primary valve of the BEST small turbine is in a fully closed state, the output signal of the switching value input module 203 of the fully closed primary valve of the BEST small turbine is 1; when the second main valve of the BEST small turbine is in a fully closed state, the output signal of the switching value input module 204 of the second main valve of the BEST small turbine is 1; when the first-order regulating gate of the BEST small turbine is in a fully closed state, the output signal of the switching value input module 205 of the first-order regulating gate of the BEST small turbine is 1; when the second switching gate of the BEST small turbine is in a fully closed state, the output signal of the switching value input module 206 of the second switching gate of the BEST small turbine is 1; when the valve positions of the second extraction check valve, the third extraction check valve, the fourth extraction check valve, the fifth extraction check valve, the sixth extraction check valve and the seventh extraction check valve of the BEST small turbine are all smaller than 5%, the output signal of the switching value input module 207 from the second extraction check valve to the seventh extraction check valve of the BEST small turbine is 1. If the switching value signal output by any one of the above modules is 0, the output signal of the first and module 209 is 0, and the first preheating starting unit 101 is controlled again to adjust and process the module whose output switching value signal is 0 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 warmup system receives the output signal 1 of the first and module, the first completion switching value output module 208 of the BEST small turbine warmup system sends the current task completion signal to the second pre-heating starting unit 102, and the second pre-heating starting unit 102 performs the operation to be performed of the unit after receiving the current task completion signal.
In some embodiments of the present application, as shown in fig. 3, the second preheating starting unit 102 includes a switching value input module 301 for normal oil pressure of the BEST small turbine, a switching value input module 302 for allowing the water supply pump to start, a switching value input module 303 for charging the first AST solenoid valve, a switching value input module 304 for charging the second AST solenoid valve, a switching value input module 305 for charging the third AST solenoid valve, a second and module 307, and a second finishing switching value output module 306 of the BEST small turbine warming-up system; wherein: the normal oil pressure switching value input module 301 of the BEST small turbine, the switching value input module 302 of the water supply pump which allows starting, the switching value input module 303 of the first AST electromagnetic valve which is electrified, the switching value input module 304 of the second AST electromagnetic valve which is electrified, and the switching value input module 305 of the third AST electromagnetic valve which is electrified are respectively connected with the input ends of the 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-up system.
That is, when the oil pressure of the BEST small turbine is normal and the oil pressure of the BEST small turbine is in a normal state, the output signal of the switching value input module 301 in which the oil pressure of the BEST small turbine is normal is 1; when the water feed pump is in an allowable starting 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 allowing the water feed pump to start is 1; when the first AST solenoid valve is in a charged state, the output signal of the switching value input module 303 of the first AST solenoid valve is 1; when the second AST solenoid valve is in a charged state, the output signal of the switch value input module 304 for charging the second AST solenoid valve is 1; when the third AST solenoid valve is in the charged state, the output signal of the switching value input module 305 to which the third AST solenoid valve is charged is 1. If the switching value signal output by any one of the above modules is 0, the output signal of the second and module 307 is 0, and the second preheating starting unit 102 is controlled again to adjust and process the module whose switching value signal is 0 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 warmup system receives the output signal 1 of the second and module 307, the second completion switching value output module 306 of the BEST small turbine warmup system sends the current task completion signal to the third pre-heating starting unit 103, and the third pre-heating starting unit 103 performs the operation to be performed 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-heating starting unit 103 includes a switching value input module 401 for opening a drain valve before the first valve of the BEST small turbine, a switching value input module 402 for opening a drain valve before the second valve of the BEST small turbine, a switching value input module 403 for opening a drain valve after the first valve of the BEST small turbine, a switching value input module 404 for opening a drain valve after the second valve of the BEST small turbine, a switching value input module 405 for fully opening a drain valve from the second valve to the seventh valve of the BEST small turbine, a switching value input module 40 for fully closing a main valve and a main valve 2 of the BEST small turbine, a switching value input module 407 for fully closing a overflow regulating valve and a check valve of the BEST small turbine, a switching value input module 408 for fully closing a check valve of the BEST small turbine, a switching value input module 409 for fully closing a low valve of the BEST small turbine, a third switching value input module 413 for fully opening a bypass valve of the BEST small turbine, and a third switching value input module 413 for completing the BEST small turbine; the device comprises a first-valve-opening switching value input module 401 of a first small steam turbine, a second-valve-opening switching value input module 402 of a second small steam turbine, a first-valve-opening switching value input module 403 of a first-valve-opening rear drain valve of the small steam turbine, a second-valve-opening switching value input module 404 of the second small steam turbine, a second-to-seventh-extraction valve-opening switching value input module 405 of the small steam turbine, a seventh-extraction valve-opening switching value input module 406 of the small steam turbine, a first-valve-and-2-main-valve-closing switching value input module 406 of the small steam turbine, a first-valve-and-2-valve-opening switching value input module 407 of the small steam turbine, a overflow regulating valve and a check valve-closing switching value input module 408 of the small steam turbine, a seventh-low-adding air-supplementing regulating valve-closing switching value input module 409 of the small steam turbine, and a bypass valve-opening switching value input module 410 of the small steam turbine, and a third-opening switching value input module 412 of the small steam turbine, respectively, and a third input module 412; the output end BEST small turbine warming-up system of the third and module 412 is connected to the third completion switching value output module 413.
That is, when the first pre-valve trap of the BEST small turbine is opened, the output signal of the switching value input module 401 for opening the first pre-valve trap of the BEST small turbine is 1; when the drain valve before the second valve of the BEST small turbine is opened, the output signal of the switching value input module 402 for opening the drain valve before the second valve of the BEST small turbine is 1; when the first-order gate-regulating drain valve of the BEST small steam turbine is opened, the output signal of the switching value input module 403 for opening the first-order gate-regulating drain valve of the BEST small steam turbine is 1; when the drain valve is opened after the second valve of the BEST small turbine, the output signal of the switching value input module 404 for opening the drain valve after the second valve of the BEST small turbine is 1; when the second to seventh extraction steam traps of the BEST small turbine are all opened, the output signal of the switching value input module 405 for all opening the second to seventh extraction steam traps of the BEST small turbine is 1; when the opening of the seventh extraction check valve of the BEST small turbine is smaller than 3%, the output signal of the switching value input module 406 of which the opening of the seventh extraction check valve of the BEST small turbine is smaller than 3% is 1; when the first main valve and the 2 main valves of the BEST small turbine are fully closed, the output signal of the switching value input module 407 of the first main valve and the 2 main valves of the BEST small turbine is 1; when the first and second turndown of the BEST small turbine are fully closed, the output signal of the switching value input module 408 of the first and second turndown of the BEST small turbine is 1; when the overflow regulating valve and the check valve of the small BEST turbine are closed and fully closed, the output signal of the switching value input module 409 for the overflow regulating valve and the check valve of the small BEST turbine are closed and fully closed is 1; when the seventh low-pressure air-supplementing regulating valve of the BEST small turbine is closed, the output signal of the switching value input module 410 for closing the seventh low-pressure air-supplementing regulating valve of the BEST small turbine is 1; when the exhaust bypass valve of the BEST small turbine is fully opened, the output signal of the switching value input module 411 of the exhaust bypass valve of the BEST small turbine is 1. If the switching value signal output by any one of the above modules is 0, the output signal of the third and module 412 is 0, and the third preheating starting unit 103 is controlled again to adjust and process the module whose switching value signal is 0 until the output signal of the third and module 412 is 1.
As an example of a possible implementation, after the third completion switching value output module 413 of the BEST small turbine warmup system receives the output signal 1 of the third and module 412, the third completion switching value output module 413 of the BEST small turbine warmup system sends the current task completion signal to the fourth pre-heating starting unit 104, and the fourth pre-heating starting unit 104 performs the operation to be performed of the unit after receiving the current task completion signal.
In some embodiments of the present application, as shown in fig. 5, the fourth preheating starting unit 104 includes a switching value input module 501 of the BEST small turbine with a temperature difference between the upper cylinder and the lower cylinder smaller than a first preset temperature, a switching value input module 502 of the BEST small turbine with a first switching value and a second switching value larger than a first preset threshold, a switching value input module 503 of the BEST small turbine with an actual rotation speed larger than the first preset rotation speed, a switching value input module 504 of the BEST small turbine with a main valve steam superheat degree larger than a second preset temperature, a fourth and module 505, and a fourth finishing switching value output module 506 of the BEST small turbine warming-up system; the switching value input module 501 of which the temperature difference between the upper cylinder and the lower cylinder of the small BEST turbine is smaller than a first preset temperature, the switching value input module 502 of which the first and second switching value thresholds of the small BEST turbine are larger than a first preset threshold, the switching value input module 503 of which the actual rotating speed of the small BEST turbine is larger than the first preset rotating speed, and the switching value input module 504 of which the superheat degree of the main valve steam of the small BEST 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 finishing switching value output module 506 of the BEST small turbine warming-up system.
That is, when the temperature difference between the upper cylinder and the lower cylinder of the BEST small turbine is smaller than the first preset temperature, the output signal of the switching value input module 501 of the BEST small turbine is 1; when the valve limits of the first and second turndown gates of the BEST small turbine are larger than a first preset threshold, the output signals of the switch value input module 502 of the first and second turndown gates of the BEST small turbine are larger than the first preset threshold are 1; when the actual rotation speed of the BEST small turbine is greater than the first preset rotation speed, the output signal of the switching value input module 503 of which the actual rotation speed of the BEST small turbine is greater than the first preset rotation speed is 1; when the superheat degree of the main valve steam of the BEST small turbine is larger than the second preset temperature, the output signal of the switching value input module 504 of the main valve steam of the BEST small turbine, of which the superheat degree is larger than the second preset temperature, is 1. If the switching value signal output by any one of the above modules is 0, the output signal of the fourth and module 505 is 0, and the fourth preheating starting 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 warmup 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 warmup system sends the current task completion signal to the fifth pre-heating starting unit 105, and the fifth pre-heating starting unit 105 performs the operation to be performed of the unit after receiving the current task completion signal.
In some embodiments of the present application, as shown in fig. 6, the fifth pre-heating start unit 105 includes a switching value input module 601 where a metal temperature 50% of a measuring point temperature on the left side of a main valve of the BEST small turbine is greater than a third preset temperature, a switching value input module 602 where a metal temperature 50% of a measuring point temperature on the right side of the main valve of the BEST small turbine is greater than the third preset temperature, a fifth and module 603, and a fifth completion switching value output module 604 of a warmup system of the BEST small turbine; wherein: the switching value input module 601 of which the temperature of a 50% measuring point of the metal temperature on the left side of the main valve of the BEST small turbine is greater than a third preset temperature and the switching value input module 602 of which the temperature of the metal temperature on the right side of the main valve of the BEST small turbine is 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 BEST small turbine warming-up system.
That is, when the temperature of the 50% measuring point of the metal temperature on the left side of the main valve of the BEST small turbine is greater than the third preset temperature, the output signal of the switching value input module 601 of the metal temperature on the left side of the main valve of the BEST small turbine, in which the temperature of the 50% measuring point is greater than the third preset temperature, is 1; when the temperature of the measuring point with the metal temperature of 50% on the right side of the main valve of the small BEST turbine is larger than the third preset temperature, the output signal of the switching value input module 602, with the metal temperature of 50% on the right side of the main valve of the small BEST turbine being larger than the third preset temperature, is 1. If the switching value signal output by any one of the modules 6 is 0, the output signal of the fifth and module 603 is 0, and the fifth preheating starting unit 105 is controlled again to adjust and process the module whose switching value signal is 0 until the output signal of the fifth and module 603 is 1.
As an example of a possible implementation, after the fifth completion switching value output module 604 of the BEST small turbine warmup system receives the output signal 1 of the fifth and module 603, the fifth completion switching value output module 604 of the BEST small turbine warmup system sends the current task completion signal to the sixth pre-heating starting unit 106, and the sixth pre-heating starting unit 106 performs the operation to be performed of the unit after receiving the current task completion signal.
In some embodiments of the present application, as shown in fig. 7, the sixth pre-heating start unit 106 includes a switching value input module 7011 of the BEST small turbine TAB in an automatic mode, a switching value input module 7022 of the AST oil pressure greater than a second preset threshold, a switching value input module 703 of the BEST small turbine TAB automatically rising to the second preset threshold, a sixth and module 704, and a sixth completion switching value output module 705 of the BEST small turbine warmup system; wherein: the TAB of the BEST small turbine is respectively connected with the input ends of the sixth and module 704 in an automatic mode, the switching value input module 701, the switching value input module 702 with AST oil pressure larger than a second preset threshold value, and the switching value input module 703 which automatically rises to the second preset threshold value of the TAB of the BEST small turbine; the output end of the sixth AND module 704 is connected with a sixth finishing switching value output module 705 of the BEST small turbine warming-up system.
That is, when TAB of the BEST small turbine is in the automatic mode, the TAB of the BEST small turbine has an output signal of 1 at the switching value input module 701 of the automatic mode; when the AST oil pressure is greater than the second preset threshold, the output signal of the switching value input module 702, in which the AST oil pressure is greater than the second preset threshold, is 1; when the BEST small turbine TAB is at the second preset threshold, the output signal of the switching value input module 703 to which the BEST small turbine TAB is automatically raised is 1. If the switching value signal output by any one of the above modules is 0, the output signal of the sixth and module 704 is 0, and the sixth preheating starting unit 106 is controlled again to adjust and process the module whose switching value signal is 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 warmup system receives the output signal 1 of the sixth and module 704, the sixth completion switching value output module 705 of the BEST small turbine warmup system sends the current task completion signal to the seventh pre-heating starting unit 107, and the first pre-heating starting unit 107 performs the operation to be performed 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-heating starting unit 107 includes a switching value input module 801 of the first main valve and the second main valve of the BEST small turbine that are fully opened, a switching value input module 802 of the seventh steam-compensating, overflow and extraction electric valve that is opened, a switching value input module 803 of the bypass steam-discharging electric valve of the BEST small turbine that is opened, a switching value input module 804 of the seventh steam-compensating valve that is put into automation, a switching value input module 805 of the seventh steam-compensating adjusting valve that is closed, a switching value input module 806 of the bypass valve of the BEST small turbine that is fully opened, a switching value input module 807 of the bypass valve that is fast-switching electromagnetic valve of the BEST small turbine that is deenergized and the bypass valve is adjustable, a seventh and module 808, and a seventh finishing switching value output module 809 of the BEST small turbine warming-up system; wherein: the full-open switching value input module 801 of the first main valve and the second main valve of the BEST small turbine, the full-open switching value input module 802 of the seventh steam supplementing, overflow and extraction electric valves, the full-open switching value input module 803 of the bypass exhaust electric valves of the BEST small turbine, the automatic switching value input module 804 of the seventh steam supplementing valve, the closed switching value input module 805 of the seventh steam supplementing regulating valve, the full-open switching value input module 806 of the exhaust bypass valves of the BEST small turbine, the quick-close switching valve of the bypass valves of the BEST small turbine, and the adjustable switching value input module 807 of the bypass valves are respectively connected with the input ends of the seventh and module 808; the output of the seventh AND module 808 is connected to a seventh done on-off output module 809 of the BEST small turbine warmup system.
That is, when the first main valve and the second main valve of the BEST small turbine are fully opened, the output signal of the switching value input module 8011 of the first main valve and the second main valve of the BEST small turbine is 1; when the seventh steam supplementing, overflow and steam extracting electric valve is opened, the output signal of the switching value input module 802 of the seventh steam supplementing, overflow 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 switching value input module 803 of the bypass exhaust electric valve of the BEST small turbine is 1; when the seventh steam supplementing valve is put into operation automatically, the output signal of the automatic switching value input module 804 of the seventh steam supplementing valve is 1; when the seventh steam supplementing regulating valve is closed, the output signal of the switching value input module 805 for closing the seventh steam supplementing 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 of the exhaust bypass valve of the BEST small turbine is 1; when the bypass valve of the BEST small turbine is powered off and the bypass valve is adjustable, the bypass valve of the BEST small turbine is powered off and the output signal of the bypass valve adjustable switching value input module 807 is 1. If the switching value signal output by any one of the above modules is 0, the output signal of the seventh and module 808 is 0, and the seventh preheating starting unit 107 is controlled again to adjust and process the module whose switching value signal is 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 warmup 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 warmup system sends the current task completion signal to the eighth pre-heating starting unit 108, and the eighth pre-heating starting unit 108 performs the operation to be performed of the unit after receiving the current task completion signal.
In some embodiments of the present application, as shown in fig. 9, the eighth preheating starting unit 108 includes an analog input module 901 of the actual rotational speed of the BEST small turbine and an eighth completion switching value output module 903 of the first comparison and larger module 902 and the BEST small turbine warming-up system; wherein: the analog input module 901 of the actual rotating speed of the BEST small turbine is connected with the input end of the first comparison module 902; the output of the first comparison and amplification module 902 is connected to an eighth complete switching value output module 903 of the BEST small turbine warming-up system.
That is, when the actual rotational speed of the BEST small turbine is set to be greater than the first preset rotational speed, the output signal connected to the input terminal of the first comparison module 901 is 1. If the switching value signal output by the analog input module 901 of the actual rotation speed of the BEST small turbine is 0, the output signal of the first comparison and amplification module 902 is 0, and the eighth preheating starting unit 108 is controlled again to adjust and process the module with the switching value signal output of 0 until the output signals of the eighth and amplification modules 902 are 1.
As an example of a possible implementation, after the eighth completion switching value output module 903 of the BEST small turbine warmup system receives the output signal 1 of the eighth and module 902, the eighth completion switching value output module 903 of the BEST small turbine warmup system sends the current task completion signal to the ninth pre-warming start unit 109, and the ninth pre-warming start unit 109 performs the operation to be performed of the unit after receiving the current task completion signal.
In some embodiments of the present application, as shown in fig. 10, the warmup control unit 109 includes an analog input module 1001 of the actual internal cylinder metal temperature of the BEST small 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 and module 1007, and a ninth completion switching value output module 1002 of the warmup system of the BEST small turbine; wherein: the analog input module 1001 of the real inner cylinder metal temperature of the BEST small turbine is respectively connected with the input end of the first comparison smaller module 1003 and the input end of the second comparison larger module 1004; the first comparison smaller module 1003 and the first comparison larger module 1004 are respectively used for comparing the input quantity of the analog quantity input module 1001 of the real inner cylinder metal temperature of the BEST small turbine with 150 ℃; the output of the first comparison less module 1003 is connected to the input of the first delay module 1005; the output end of the second comparison larger module 1004 is connected with the input end 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 completion switching value output module 1002 of the BEST small turbine warming-up system.
That is, when the output of the analog input module 1001 of the actual internal cylinder metal temperature of the BEST small turbine is less than 150 ℃, the output of the first comparison smaller module 1003 is 1, and the output of the first comparison larger module 1004 is 0, the actual internal cylinder metal temperature of the BEST small turbine is continuously increased for 30min; when the output quantity of the analog quantity input module 1001 of the real internal cylinder metal temperature of the BEST small turbine is greater than 150 ℃, the output quantity of the first comparison smaller module 1003 is 0, and the output quantity of the first comparison larger module 1004 is 1, the real internal cylinder metal temperature of the BEST small turbine is kept for 10min at the temperature of greater than 150 ℃. When the output of either one of the first comparison module 1004 and the first comparison module 1003 is 1, the output of the eighth and module 1007 is 1. At this time, the BEST steam turbine warmup operation is completed.
In some embodiments of the present application, 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 rotational speed is 999r/min.
According to the pre-heating start control system of the small BEST turbine, the control strategy of the pre-heating start of the small BEST turbine is optimized and perfected by combining the system characteristic and the operation parameter of the small BEST turbine and the debugging result of the small BEST turbine during the debugging period, and a pre-heating start control strategy scheme of the small BEST turbine is provided by combining the operation characteristic of the small BEST turbine, so that the small BEST turbine is successfully warmed up and the rotating speed of the small BEST turbine reaches 1000r/min, and a solid foundation is laid for the next small BEST turbine starting process. In addition, the self-starting and pre-heating function of the BEST small steam 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 of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," 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 present application. In this specification, schematic representations of the above terms are not necessarily directed 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. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" is at least two, such as two, three, etc., unless explicitly defined otherwise.
It is to be understood that portions of the present application may be implemented in hardware, software, firmware, or a combination thereof. In the above-described embodiments, the various steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. If implemented in hardware, as in another embodiment, may be implemented using any one or combination of the following techniques, as known in the art: discrete logic circuits having logic gates for implementing logic functions on data signals, application specific integrated circuits having suitable combinational logic gates, programmable Gate Arrays (PGAs), field Programmable Gate Arrays (FPGAs), and the like.
Those of ordinary skill in the art will appreciate that all or a portion of the steps carried out in the method of the above-described embodiments may be implemented by a program to instruct related hardware, where the program may be stored in a computer readable storage medium, and where the program, when executed, includes one or a combination of the steps of the method embodiments.
In addition, each functional unit in each embodiment of the present application may be integrated in one processing module, or each unit may exist alone physically, or two or more units may be integrated in one module. The integrated modules may be implemented in hardware or in software functional modules. The integrated modules may also be stored in a computer readable storage medium if implemented in the form of software functional modules and sold or used as a stand-alone product.
The above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, or the like. Although embodiments of the present application have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the application, and that variations, modifications, alternatives, and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the application.

Claims (11)

  1. A best small turbine pre-warm start control system, the system comprising:
    the first pre-heating starting unit is used for respectively controlling the interlocking input of valve groups of the BEST small steam turbines, respectively controlling the total closing of a first main valve and a second main valve of the BEST small steam turbines, respectively controlling the total closing of a first valve and a second valve of the BEST small steam turbines, and controlling the total closing of a second extraction check valve, a third extraction check valve, a fourth extraction check valve, a fifth extraction check valve, a sixth extraction check valve and a seventh extraction check valve of the BEST small steam turbines;
    the second preheating 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 water supply pump to start after determining that the running state of the oil system of the BEST small steam turbine meets the preset requirement;
    The third pre-heating starting unit is used for controlling the opening of a first-valve front drain valve and a second-valve front drain valve of the small BEST turbine, controlling the opening of a first-valve rear drain valve and a second-valve rear drain valve of the small BEST turbine, controlling the opening of a second-valve steam extraction drain valve, a third-valve steam extraction drain valve, a fourth-valve steam extraction drain valve, a fifth-valve steam extraction drain valve, a sixth-valve steam extraction drain valve and a seventh-valve steam extraction drain valve, controlling the full closing of a seventh-valve extraction check valve, controlling the full closing of a first main valve and a second main valve of the small BEST turbine, controlling the full closing of a first-valve and a second-valve of the small BEST turbine, controlling the closing of an overflow regulating valve and a check valve of the small BEST turbine, and controlling the full opening of a seventh-valve low-adding air-supplementing regulating valve;
    the fourth preheating 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 the first valve regulating limit and the second valve regulating limit of the BEST are both larger than the 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 main valve steam superheat degree of the BEST small turbine is larger than a second preset temperature;
    the fifth preheating starting unit is used for determining whether the temperature of a 50% measuring point of the metal temperature at the left side of the main valve and the temperature of a 50% measuring point of the metal temperature at the right side of the main valve are both greater than a third preset temperature;
    A sixth pre-heating starting unit, configured to determine whether the TAB value is greater than a second preset threshold value, and determine whether the AST oil pressure is greater than the second preset threshold value;
    the seventh preheating starting unit is used for controlling the full opening of the first main valve and the second main valve of the BEST small turbine, controlling the opening of the seventh steam supplementing valve, the overflow valve and the steam extraction electric valve, controlling the opening of the bypass steam exhaust electric valve of the BEST small turbine, controlling the automatic input of the seventh steam supplementing valve, controlling the closing of the seventh steam supplementing regulating valve, controlling the full opening of the steam exhaust bypass valve of the BEST small turbine and controlling the quick power-off electromagnetic valve of the bypass valve;
    an eighth preheating starting unit, which is used for determining whether the rotating speed of the BEST small turbine is larger than a first preset rotating speed;
    and the warming-up control unit is used for controlling the BEST small steam turbine to perform warming-up operation.
  2. 2. The system of claim 1, wherein the first pre-heating starting unit comprises a switching value input module for interlocking input of a valve bank number one of the small BEST turbines, a switching value input module for interlocking input of a valve bank number two of the small BEST turbines, a switching value input module for full closing of a main valve number one of the small BEST turbines, a switching value input module for full closing of a main valve number two of the small BEST turbines, a switching value input module for full closing of a valve bank number one of the small BEST turbines, a switching value input module for full closing of a valve bank number two of the small BEST turbines, a switching value input module for valve positions from a valve bank number two of the small BEST turbines to a valve bank number seven of the extraction valves, a first and module and a first complete switching value output module of the warmup system of the small BEST turbines; wherein:
    The device comprises a first valve group interlocking input switching value input module of a BEST small turbine, a second valve group interlocking input switching value input module of the BEST small turbine, a first main valve totally closed switching value input module of the BEST small turbine, a second main valve totally closed switching value input module of the BEST small turbine, a first valve totally closed switching value input module of the BEST small turbine, a second valve totally closed switching value input module of the BEST small turbine, and switching value input modules from a second extraction check valve to a seventh extraction check valve of the BEST small turbine, wherein valve positions of the switching value input modules are less than 5% respectively;
    the output end of the first AND module is connected with a first switch-value output module of the BEST small turbine warming-up system.
  3. 3. The system according to claim 1, wherein the second pre-heating starting unit comprises a normal oil pressure switching value input module of the BEST small turbine, a water supply pump start-permitting switching value input module, a first AST solenoid electrified switching value input module, a second AST solenoid electrified switching value input module, a third AST solenoid electrified switching value input module, a second AND module and a second completion switching value output module of the BEST small turbine warming-up system; wherein:
    The hydraulic normal switching value input module of the BEST small turbine, the switching value input module of the water supply pump which is allowed to start, the switching value input module of the first AST electromagnetic valve which is electrified, the switching value input module of the second AST electromagnetic valve which is electrified, and the switching value input module of the third AST electromagnetic valve which is electrified are respectively connected with the input ends of the second and the modules;
    and the output end of the second AND module is connected with a second finishing switching value output module of the BEST small turbine warming-up system.
  4. 4. The system of claim 1, wherein the third pre-heating starting unit comprises a switching value input module for opening a drain valve before a first valve of the small BEST turbine, a switching value input module for opening a drain valve before a second valve of the small BEST turbine, a switching value input module for opening a drain valve after the first valve of the small BEST turbine, a switching value input module for opening a drain valve after the second valve of the small BEST turbine, a switching value input module for fully opening a second to seventh extraction valve of the small BEST turbine, a switching value input module for fully closing a first main valve and a second main valve of the small BEST turbine, a switching value input module for fully closing a first valve and a second valve of the small BEST turbine, a switching value input module for fully closing a first overflow regulating valve and a check valve of the small BEST turbine, a switching value input module for closing a seventh low make-up regulating valve of the small BEST turbine, a switching value input module for fully closing a third main valve of the small BEST turbine, a third switching value input module for completing the system and the third switching value input module for the small BEST turbine; wherein:
    The device comprises a switching value input module for opening a drain valve before a first valve of a small BEST turbine, a switching value input module for opening a drain valve before a second valve of the small BEST turbine, a switching value input module for opening a drain valve after the first valve of the small BEST turbine, a switching value input module for opening a drain valve after the second valve of the small BEST turbine, a switching value input module for completely opening two to seven steam extraction drain valves of the small BEST turbine, a switching value input module for completely controlling the switching value of the drain valve of the small BEST turbine, a switching value input module for controlling the switching value of the drain valve of the small BEST turbine the opening degree of the seventh extraction check valve of the BEST small turbine is smaller than 3%, the opening degree of the first main valve and the second main valve of the BEST small turbine is totally closed, the overflow regulating valve and the check valve of the BEST small turbine are totally closed, the opening degree of the seventh low-pressure air supplementing regulating valve of the BEST small turbine is totally closed, and the opening degree of the BEST small turbine is totally opened;
    and the output end BEST small steam turbine warming-up system of the third AND module is connected with a third finishing switching value output module.
  5. 5. The system of claim 1, wherein the fourth pre-heating starting unit comprises a switching value input module of which the temperature difference between an upper cylinder and a lower cylinder of the BEST small turbine is smaller than a first preset temperature, a switching value input module of which a first valve adjustment and a second valve adjustment of the BEST small turbine are larger than a first preset threshold, a switching value input module of which the actual rotating speed of the BEST small turbine is larger than the first preset rotating speed, a switching value input module of which the superheat degree of main valve steam of the BEST small turbine is larger than a second preset temperature, a fourth and module and a fourth finishing switching value output module of a BEST small turbine warming-up system; wherein:
    The switching value input module of which the temperature difference between the upper cylinder and the lower cylinder of the BEST small turbine is smaller than a first preset temperature, the switching value input module of which the first switching value and the second switching value of the BEST small turbine are larger than a first preset threshold, the switching value input module of which the actual rotating speed of the BEST small turbine is larger than the first preset rotating speed, and the switching value input module of which 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 the fourth modules;
    and the output end of the fourth AND module is connected with a fourth finishing switching value output module of the BEST small turbine warming-up system.
  6. 6. The system of claim 1, wherein the fifth pre-warm start unit comprises a switching value input module with a 50% metal temperature measurement point temperature on the left side of the main valve of the BEST small turbine greater than a third preset temperature, a switching value input module with a 50% metal temperature measurement point temperature on the right side of the main valve of the BEST small turbine greater than the third preset temperature, a fifth and module, and a fifth complete switching value output module of the BEST small turbine warmup system; wherein:
    the switching value input module of which the temperature of a 50% measuring point of the metal temperature on the left side of the main valve of the BEST small turbine is greater than a third preset temperature and the switching value input module of which the temperature of a 50% measuring point of the metal temperature on the right side of the main valve of the BEST small turbine is greater than the third preset temperature are respectively connected with the input ends of the fifth and module;
    And the output end of the fifth AND module is connected with a fifth finishing switching value output module of the BEST small turbine warming-up system.
  7. 7. The system of claim 1, wherein the sixth pre-warm start unit includes a TAB in auto mode switching value input module of the BEST small turbine, a AST oil pressure greater than a second preset threshold switching value input module, a TAB second preset threshold switching value input module of the BEST small turbine automatically raised to, a sixth and module, and a sixth complete switching value output module of the BEST small turbine warm-up system; wherein:
    the TAB of the BEST small turbine is respectively connected with the input ends of the sixth and the modules in an automatic mode, an on-off input module with AST oil pressure larger than a second preset threshold value and an on-off input module with the TAB of the BEST small turbine automatically raised to the second preset threshold value;
    and the output end of the sixth AND module is connected with a sixth finishing switching value output module of the BEST small steam turbine warming-up system.
  8. 8. The system according to claim 1, wherein the seventh pre-heating starting unit comprises a switching value input module of a first main valve and a second main valve of the BEST small turbine, a switching value input module of a seventh steam supplementing, overflow and extraction electric valve which is opened, a switching value input module of a bypass exhaust electric valve of the BEST small turbine, a switching value input module of a seventh steam supplementing input automatic, a switching value input module of a seventh steam supplementing regulating valve which is closed, a switching value input module of a steam exhaust bypass valve of the BEST small turbine, a switching value input module of a bypass valve quick-closing electromagnetic valve of the BEST small turbine which is in power failure and a switching value adjustable by the bypass valve, a seventh and module and a seventh finishing switching value output module of the BEST small turbine system; wherein:
    The automatic switching value input module is used for switching the first main valve and the second main valve of the BEST small turbine, the switching value input module for switching the bypass exhaust electric valve of the BEST small turbine, the switching value input module for switching the seventh steam compensating valve on, the switching value input module for switching the seventh steam compensating valve off, the switching value input module for switching the exhaust bypass valve of the BEST small turbine, the switching value input module for switching the bypass valve of the BEST small turbine off and switching value adjustable by the bypass valve are respectively connected with the input ends of the seventh and the seventh modules;
    and the output end of the seventh AND module is connected with a seventh finishing switching value output module of the BEST small steam turbine warming-up system.
  9. 9. The system of claim 1, wherein the eighth pre-warm start unit comprises an analog input module of an actual rotational speed of the BEST small turbine and an eighth completion switching value output module of the first comparison greater module and the BEST small turbine warmup system; wherein:
    the analog input module of the actual rotating speed of the BEST small turbine is connected with the input end of the first comparison module;
    The output end of the first comparison module is connected with an eighth finishing switching value output module of the BEST small turbine warming-up system.
  10. 10. The system according to claim 1, wherein the warmup control unit comprises an analog input module of the actual internal cylinder metal temperature of the BEST small turbine, a first comparison smaller module, a first delay module, a second comparison larger module, a second delay module, an eighth AND module, and a ninth completion switching value output module of the BEST small turbine warmup system; wherein:
    the analog quantity input module of the real inner cylinder metal temperature of the BEST small steam turbine is respectively connected with the input end of the first comparison smaller than module and the input end of the second comparison larger than module; the first comparison smaller module and the first comparison larger module are respectively used for comparing the input quantity of the analog quantity input module of the real inner cylinder metal temperature of the BEST small steam turbine with 150 ℃;
    the output end of the first comparison smaller module is connected with the input end of the first delay module;
    the output end of the second comparison larger 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 modules;
    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-up system.
  11. 11. The system of claim 1, wherein 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.
CN202211032347.5A 2022-08-26 2022-08-26 Pre-heating starting control system of BEST small steam turbine Active CN115234310B (en)

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