CN216052733U - Gas-steam combined cycle unit automatic start-stop system who contains APS controller - Google Patents
Gas-steam combined cycle unit automatic start-stop system who contains APS controller Download PDFInfo
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- CN216052733U CN216052733U CN202121595699.2U CN202121595699U CN216052733U CN 216052733 U CN216052733 U CN 216052733U CN 202121595699 U CN202121595699 U CN 202121595699U CN 216052733 U CN216052733 U CN 216052733U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
Abstract
The utility model discloses a gas-steam combined cycle unit automatic start-stop system containing an APS controller, which comprises an APS initialization module, an APS automatic start module and an APS automatic stop module, wherein the APS automatic start module comprises an auxiliary start function group, a boiler water injection function group and a unit start function group; the APS automatic shutdown module comprises a load reduction function group, a unit shutdown function group and an auxiliary shutdown function group. The APS system is specially designed with an APS controller for guaranteeing the functions of realizing breakpoint, fault alarm, recovery and the like, can realize system check, prepare before starting and stopping the unit, start the unit system by one key, start the excitation of a steam turbine generator, automatically control high, medium and low pressure bypasses of the steam turbine and a boiler, automatically control the load rise of the unit, not only complete the sequential control of each device, but also realize the automatic water feeding and draining at the boiler side, coordinate the automatic input of the control system and perfect the functions of the unit APS system.
Description
Technical Field
The utility model relates to the field of automatic control of a gas-steam combined cycle unit, in particular to an automatic start-stop system of the gas-steam combined cycle unit, which comprises an APS controller.
Background
The energy power industry is constantly changing, the demand for solving the environmental problem and the sustainability challenge is higher and higher, and new energy such as wind power, photovoltaic and the like brings huge challenge to the power generation of the gas turbine at lower cost. How to realize the application of multi-energy complementation and new technology by means of the stability characteristics of the gas turbine is the direction worthy of research at present. Among them, heavy gas turbines are gradually decreasing in demand due to the effects of excess capacity and reduced cost of renewable energy. However, many areas in China are converting coal thermal power or nuclear power into natural gas power, and the flexibility and reliability of gas turbines are also more widely regarded in various areas around the world. Gas turbines are also gradually moving towards the renewable energy power generation market, exerting their good peak shaving effect.
An Automatic Start-up and Shut-down System (APS) of a gas-steam combined cycle unit is a System for controlling the unit to automatically Start and stop, adopts an advanced control strategy, can replace operators to automatically judge the working condition of the unit, selects corresponding programs to perform corresponding operation, automatically adjusts the parameters of the unit according to a designed operation curve, obviously lightens the work load of the operators of the unit, greatly reduces the possibility of misoperation of the operators, simultaneously improves the safety and economic benefit of the unit operation, and has extremely important significance for power plants and even improving the automation level of power grids.
SUMMERY OF THE UTILITY MODEL
The utility model provides an automatic start-stop system of a gas-steam combined cycle unit containing an APS controller, which has the characteristics of clear structural hierarchy, convenient operation, complete functions and the like.
In order to achieve the aim, the utility model provides the following technical scheme that the automatic start-up and stop system of the gas-steam combined cycle unit with the APS controller comprises an APS initialization module, an APS automatic start module and an APS automatic stop module, wherein the automatic start module comprises an auxiliary start function group, a boiler water injection function group and a unit start function group, and the unit start function group comprises five sub-function groups of a gas turbine starting device, a boiler starting device, a vacuum establishing device, a steam turbine starting device and a load lifting control device; the automatic shutdown module comprises three functional groups, namely a load reduction functional group, a unit shutdown functional group and an auxiliary shutdown functional group, wherein the unit shutdown functional group comprises three sub-functional groups, namely a gas turbine shutdown device, a steam turbine brake opening device and a boiler shutdown device.
As an improvement, the auxiliary starting functional group comprises an auxiliary steam device, a demineralized water device, a circulating water pump device, an open water device, a closed water device, a public device, a gasoline engine lubricating oil device, an EH oil device, a turning gear device and a condensed water device; the boiler water injection function group comprises a low-pressure steam drum water injection device and a high-medium pressure steam drum water injection device; the load reduction functional group comprises a boiler drainage device, a steam turbine bypass device, a steam turbine drainage device and an auxiliary steam seal steam supply device; the auxiliary shutdown function group comprises a vacuum shutdown device, a public shutdown device and a condensed water shutdown device.
As an improvement, the APS system is structurally divided into an APS control layer, a function group and a sub-function group.
As an improvement, the APS system has the hot start and stop of a unit, and a vacuum device is arranged behind a boiler starting device in the starting stage, so that the normal temperature and pressure of shaft seal steam during hot start are ensured; in the auxiliary shutdown function group, the closing time of the inlet baffle and the flue gas baffle of the gas turbine can be set, so that the waste heat boiler is ensured to be in a hot state.
As an improvement, the APS system can use breakpoint automatic processing control and APS controller control to ensure the unit system to be started by one key, wherein the APS controller can realize the breakpoint automatic processing function and can realize the fault alarming and recovering functions through interaction with a DCS system, a historical station and an external fault diagnosis module.
As an improvement, in order to improve the control function integrity of the APS system, a chemical water treatment device, an air device for instruments and a hydrogen device are used as APS initialization modules.
The novel point of the utility model is that the automatic start-stop system of the gas-steam combined cycle unit containing the APS controller has the advantages of clear structure, convenient operation and complete functions, the structure of the automatic start-stop system is divided into an APS control layer, a function group and a sub-function group, and the safety and the stability of the unit are ensured while the functions are complete; designing a proper sequential control flow aiming at the hot-state starting process; aiming at the starting of a unified key of a set system, a new idea is provided for the setting of a breakpoint; in order to realize the functions of breakpoint, jump, input, cut-off, fault alarm, recovery and the like of the APS system, an APS controller is specially designed; in order to ensure the functional integrity of the APS, a chemical water treatment device, an air device for instruments and a hydrogen device are also simultaneously arranged in the APS system; in general, the APS system can also realize system check before starting and stopping, the unit system is started by one key, the excitation of a steam turbine generator is put into operation, the steam turbine and a high-medium low-pressure bypass of a boiler are automatically controlled, and the load-increasing of the unit is automatically controlled, so that the APS system not only can complete the sequential control of all devices, but also can realize the automatic water feeding and draining at the boiler side and coordinate control automatic input, and is suitable for various gas-steam combined cycle generator sets.
Drawings
Fig. 1 is a structural diagram of an automatic start-stop system of a gas-steam combined cycle unit including an APS controller according to the present invention.
FIG. 2 is a flow chart of the starting control of the automatic start-stop system of the gas-steam combined cycle unit with the APS controller.
Fig. 3 is a flowchart illustrating shutdown control of an automatic start-stop system of a gas-steam combined cycle unit including an APS controller according to the present invention.
Fig. 4 is a connection diagram of interfaces between an APS controller of a gas-steam combined cycle generator set and each system.
Detailed Description
In order that the objects and advantages of the utility model will be more clearly understood, the utility model is further described below with reference to examples; it should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and do not limit the scope of the present invention.
It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Referring to fig. 1, which is a schematic structural view of an automatic start-stop system of a gas-steam combined cycle unit including an APS controller according to the present invention, the present invention discloses an automatic start-stop system of a gas-steam combined cycle unit including an APS controller, including an APS system 1, an APS initialization module 2, an APS automatic start module 3, an APS automatic stop module 4, an auxiliary start function group 5, a boiler water injection function group 6, a unit start function group 7, a load reduction function group 8, a unit stop function group 9, an auxiliary stop function group 10, a chemical water treatment device 11, an instrument air device 12, a hydrogen device 13, a combustion engine start device 14, a boiler start device 15, a vacuum establishment device 16, a steam engine start device 17, a load increase control device 18, a combustion engine stop device 19, a steam engine brake device 20, and a boiler stop device 21, wherein,
the APS automatic starting module 3 comprises an auxiliary starting function group 5, a boiler water injection function group 6 and a unit starting function group 7;
the auxiliary starting functional group 5 comprises an auxiliary steam device, a demineralized water device, a circulating water pump device, an open water device, a closed water device, a public device, a gasoline engine lubricating oil device, an EH oil device, a turning gear device and a condensed water device;
the boiler water injection functional group 6 comprises a low-pressure steam drum water injection device and a high-medium pressure steam drum water injection device;
the unit starting functional group 7 comprises a combustion engine starting device 14, a boiler starting device 15, a vacuum establishing device 16, a steam engine starting device 17 and a load-raising control device 18;
the gas turbine starting device 14 comprises gas turbine starting condition permission, gas turbine blowing, ignition, speed raising to 3000r/min and gas turbine generator grid connection;
the boiler starting device 15 comprises a boiler low-pressure device, a boiler high-medium pressure device and a high-medium low-pressure bypass switching device after the combustion engine is successfully ignited;
the vacuum establishing device 16 comprises a shaft seal device and a vacuum device;
the steam turbine starting device 17 comprises a steam turbine starting condition permission device, a DEH starting sequence control device and a steam turbine generator excitation device (the steam turbine is started but is put into operation before grid connection);
the load-lifting control device 18 includes a coordination control automatic throwing device and a unit automatic load-lifting device.
The APS automatic shutdown module 4 comprises a load reduction function group 8, a unit shutdown function group 9 and an auxiliary shutdown function group 10;
the load reduction functional group 8 comprises an automatic quit AGC, an AVC, a primary frequency modulation, a gas turbine load reduction, a boiler drain switching automation, a steam turbine high-medium pressure bypass switching automation, a steam turbine drain valve opening and an auxiliary steam seal steam supply pressure switching automation;
the unit shutdown function group 9 comprises a combustion engine shutdown device 19, a steam engine brake opening device 20 and a boiler shutdown device 21;
the combustion engine stopping device 19 comprises a combustion engine stopping device and a combustion engine generator splitting device;
the steam turbine brake opening device 20 comprises a steam turbine load reduction device, a main steam valve closing device and a steam turbine generator disconnection device;
the boiler shutdown device 21 comprises an automatic middle-closing, high-pressure and low-pressure blowdown valve, a high-pressure and middle-pressure water supply pump, a boiler, a steam turbine drainage device and a low-pressure water supply pump;
the auxiliary shutdown function group 10 includes a vacuum device, a shaft seal shutdown device, a common shutdown device, and a condensed water shutdown device.
As an improved embodiment, the APS system 1 logic structure is divided into an APS control layer, a function group, and a sub-function group.
As an improved embodiment, the APS system 1 fully considers the hot start and stop of the unit, and after the vacuum building device 16 is placed behind the boiler starting device 15 in the starting stage, the normal temperature and pressure of the shaft seal steam during the hot start are ensured; in the auxiliary shutdown functional group 10, the closing time of the inlet baffle and the flue gas baffle of the gas turbine can be set to ensure that the exhaust-heat boiler is in a hot state.
During the hot start, the vacuum building device 16 is put into operation after the ignition start of the combustion engine, which will result in the start delay of the bypass device, and the main steam pressure has no path, and to solve this problem, the steam engine start part is optimized, and the steam engine bypass automatic control system is independent of the vacuum building device 16.
As an improved embodiment, the breakpoint setting of the APS system 1 is an important factor that affects the safety and the rapidity of the unit during the start-stop process, and is also an important embodiment of the automation degree of the APS system 1.
The breakpoint automatic processing is divided into two methods, a delay signal is set, for example, for a circulating water pump, delay judgment can be made after the circulating water pump is started; or the input breakpoint signal is automatically controlled, for example, the water filling breakpoint of the high-medium pressure steam drum device in the boiler water filling functional group 6 can be automatically detected by the liquid level switch to complete the water filling.
The APS controller can be arranged to reduce APS breakpoints and optimize the modification perfection of APS logic. The APS system 1 adopts a dual-ring redundant Ethernet mode in which an independent controller is hung, data interaction between the APS system 1 and a waste heat boiler DCS control cabinet is achieved, then a bridge is built through the waste heat boiler DCS control cabinet, information interaction between the APS system 1 and a gas turbine TCS control cabinet and a steam turbine DEH control cabinet is achieved, and therefore calling of whole unit data of the APS system 1 is achieved. The APS controller should also implement the functions of subsystem skip, subfunction group investment, removal, fault alarm and recovery, in addition to the breakpoint function. In order to realize the function of fault alarm, the APS controller can collect real-time data of each signal through the DCS system to judge faults on one hand, and can judge whether some analog signals belong to a normal range or not through the historical station on the other hand. The APS controller adopts a mode of externally hanging a fault detection module aiming at the fault recovery function, and once a fault occurs in the system operation period, the module is automatically accessed and carries out fault positioning and manual reinspection.
As an improved embodiment, in order to improve the control function integrity, the APS system 1 incorporates the chemical water treatment device 11, the instrument air device 12, and the hydrogen device 13 into the APS initialization module 2; the APS system 1 is expanded to the whole power plant range, and the monitoring of chemical water treatment, wastewater treatment, raw water pretreatment and domestic sewage treatment can be realized on an APS picture.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the utility model, and the technical scheme after the changes or substitutions can fall into the protection scope of the utility model.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention; various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The automatic start-up and shut-down system of the gas-steam combined cycle unit with the APS controller comprises an APS initialization module, an APS automatic start-up module and an APS automatic shut-down module, wherein the automatic start-up module comprises an auxiliary start-up function group, a boiler water injection function group and a unit start-up function group, and the unit start-up function group comprises five sub-function groups of a gas turbine starting device, a boiler starting device, a vacuum building device, a steam turbine starting device and a load-raising control device; the automatic shutdown module comprises three functional groups, namely a load reduction functional group, a unit shutdown functional group and an auxiliary shutdown functional group, wherein the unit shutdown functional group comprises three sub-functional groups, namely a gas turbine shutdown device, a steam turbine brake opening device and a boiler shutdown device.
2. The APS controller-containing gas-steam combined cycle unit automatic start-stop system according to claim 1, wherein the auxiliary start function group comprises an auxiliary steam device, a demineralized water device, a circulating water pump device, an open water device, a closed water device, a public device, a turbine lubricating oil device, an EH oil device, a barring gear and a condensed water device; the boiler water injection function group comprises a low-pressure steam drum water injection device and a high-medium pressure steam drum water injection device; the load reduction functional group comprises a boiler drainage device, a steam turbine bypass device, a steam turbine drainage device and an auxiliary steam seal steam supply device; the auxiliary shutdown function group comprises a vacuum shutdown device, a public shutdown device and a condensed water shutdown device.
3. The APS controller-containing gas-steam combined cycle unit automatic start-stop system according to claim 1, wherein the APS system is structurally divided into an APS control layer, a function group and a sub-function group.
4. The automatic start-stop system of the gas-steam combined cycle unit with the APS controller according to claim 1, wherein the APS system is used for starting and stopping the unit in a hot state, and a vacuum device is arranged behind a boiler starting device in a starting stage to ensure that the temperature and the pressure of shaft seal steam are normal during the hot state starting; in the auxiliary shutdown function group, the closing time of the inlet baffle and the flue gas baffle of the gas turbine can be set, so that the waste heat boiler is ensured to be in a hot state.
5. The automatic start-stop system of the gas-steam combined cycle unit with the APS controller according to claim 2, wherein the APS system is started by a key of a security unit system and can use breakpoint automatic processing control and APS controller control, wherein the APS controller can realize breakpoint automatic processing function and can realize fault alarm and recovery function through interaction with a DCS system, a historical station and an external fault diagnosis module.
6. The APS controller-containing gas-steam combined cycle unit automatic start-stop system according to claim 1, wherein the APS initialization module comprises a chemical water treatment device, an instrument air device and a hydrogen device.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121595699.2U CN216052733U (en) | 2021-07-13 | 2021-07-13 | Gas-steam combined cycle unit automatic start-stop system who contains APS controller |
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| CN202121595699.2U CN216052733U (en) | 2021-07-13 | 2021-07-13 | Gas-steam combined cycle unit automatic start-stop system who contains APS controller |
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| CN216052733U true CN216052733U (en) | 2022-03-15 |
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