CN102393688B - One-key start-stop control system for fuel gas and steam combined cycle unit - Google Patents
One-key start-stop control system for fuel gas and steam combined cycle unit Download PDFInfo
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- CN102393688B CN102393688B CN201110276121.5A CN201110276121A CN102393688B CN 102393688 B CN102393688 B CN 102393688B CN 201110276121 A CN201110276121 A CN 201110276121A CN 102393688 B CN102393688 B CN 102393688B
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Abstract
The invention discloses a one-key start-stop control system for a fuel gas and steam combined cycle unit. The combined cycle unit at least comprises a combustion engine and a combustion engine auxiliary system, a steam turbine, a steam turbine auxiliary system, a waste heat boiler, a BOP (branch of plant) system and a common system; the one-key start-stop control system covers the combustion engine and combustion engine auxiliary system, the steam turbine and the steam turbine auxiliary system, the waste heat boiler, the BOP system and the common system; the one-key start-stop control system is a hierarchical control structure and comprises a unit coordinating level control module, a subgroup level control module and an equipment level control module; the sequence control logic of the unit coordinating level control module, and the subgroup level control module are all provided with bypass structures; and a control mode of automatic logic judgment is adopted for a manual judgment point and a confirmation point of the one-key start-stop control system. The system provided by the invention realizes safe and reliable start and stop of the combined cycle unit; the start-stop process of the unit is solidified to the control system, so that artificial error operation is prevented; artificial interference in the operation of the unit is greatly reduced, and the reliability of the unit is greatly improved.
Description
Technical field
The present invention relates to the thermal technics art of Combined cycle gas-steam turbine unit, particularly relate to a kind of One-key start-stop control system for fuel of large-scale Combined Cycle Unit.
Background technology
Start & shutdown through one key (APS, automatic power plant start up & shut down system) is the system realizing genset startup and stopped process robotization, is one of recent development direction of Prospect of Instrumentation & Control in Thermal Power Plant.As the effective method improving unit automation horizontal line, be subject to industry and more and more pay close attention to and pay attention to.One-key start-stop control system for fuel is powerful, it is advantageous that correctness, the standardization that can improve Unit Commitment, greatly alleviates the working strength of operations staff.An effective One-key start-stop control system for fuel can strengthen the security of equipment operation, shortens the Unit Commitment time, reduces the energy consumption of Unit Commitment process, improves the automatization level of unit on the whole.
But start & shutdown through one key is the system of a bulky complex, and design and implementation all has larger difficulty simultaneously.The many newly-built coal unit of recent year and Combined Cycle Unit all attempt to design One-key start-stop control system for fuel.
CN102080579A discloses a kind of nuclear power station Turbo-generator Set on off control method, device and DCS control system, and the method comprises: detect the running status of Turbo-generator Set and operational factor, the running status of backup system of Turbo-generator Set and the failure message of operational factor and Turbo-generator Set emerged in operation; The above-mentioned information detected is concentrated and is presented at same function tracking interface; The above-mentioned information of following the tracks of interface display according to function directly transports row control to the start and stop of Turbo-generator Set.The method that this patent application provides can make operator intuitively, find the exception of steam turbine power generation unit fast, and obtain key parameter fast and accurately and judge reason, thus make operator can transport row control intuitively, fast and accurately to the start and stop of nuclear power station steam turbine power generation unit and intervene to a certain extent, ensure the safety of nuclear power station steam turbine power generation unit.But the on off control method of above-mentioned nuclear power station cannot be applied on gas-vapo(u)r Unit erriger, and on off control scope is not comprehensive yet, and automaticity is not high.
Another important branch Thermal generation unit of genset also has and to adopt One-key start-stop control system for fuel, but because Thermal generation unit technological process is complicated, existing start & shutdown through one key system cannot meet complicated working condition requirement, finally causes this system cannot realize the start & shutdown through one key in complete meaning and only can operate by operations staff the start and stop that some subgroups carry out single sub-process system.
The relatively conventional coal unit of Combined cycle gas-steam turbine unit, technological process is simple, and the integrated level of combustion engine and turbine control system is high, has the basic condition implementing APS.But Combined cycle gas-steam turbine unit has two major features again: first Combined cycle gas-steam turbine unit must load-responsive fast, start-up time of unit, comparatively coal unit shortened (therefore for peak load regulation network) greatly; It two is that Combined Cycle Unit opens, stops frequent, is generally to open day and stops night.
The exploitation of current domestic Combined cycle gas-steam turbine power plant APS, applicable cases:
1, CLP power plant achieves a key of preparatory stage before subsidiary engine device start and starts, and has done to revise to start and stop program and perfect, makes to shorten to 29 minutes from original 55 minutes during a key payment for initiation of its preparatory stage.
2, Shenzhen power plant reports that three units of its those under one's command in 2007 have all realized an omnidistance key and started, but from report data, the processes such as its boiler water filling still adopt manual mode to carry out, so leave an omnidistance FR key startup to still have gap.
3, Shanghai GTCC power plant only realizes the start & shutdown through one key function of the actuating section at TCS side and combustion engine-steam turbine-generator, and its APS does not contain stove island and BOP (balance of plant) system.
Can find out, although current domestic several home fuel gas Steam Combined Cycle unit has carried out the exploitation of One-key start-stop control system for fuel, but from the equipment scope that start and stop relate to, the automaticity of shutdown process, and the aspect analysis such as the economy of shutdown process and security, still need to optimize further and improve.
Therefore, those skilled in the art is devoted to develop the high Combined Cycle Unit One-key start-stop control system for fuel of a kind of automaticity.
Summary of the invention
Because the above-mentioned defect of prior art, technical matters to be solved by this invention is to provide the Combined Cycle Unit One-key start-stop control system for fuel that a kind of automaticity is high, security is good, to improve the above-mentioned defect of prior art.
For achieving the above object, the invention provides a kind of One-key start-stop control system for fuel of Combined cycle gas-steam turbine unit, described Combined Cycle Unit at least comprises combustion engine and combustion engine backup system, steam turbine and steam turbine backup system, also comprises waste heat boiler, BOP system and synergic system; Described One-key start-stop control system for fuel covers described combustion engine and combustion engine backup system, described steam turbine and steam turbine backup system, described waste heat boiler, described BOP system and described synergic system; Described One-key start-stop control system for fuel is step control structure, is followed successively by unit cooperative level control module, subgroup level control module and device level control module from upper strata toward lower floor; In the sequence logic of described unit cooperative level control module, subgroup level control module, all bypass structure is set; Namely subgroup level control module is when starting sequence without the need to performing the equipment full cut-off state that relates to from this subgroup, and subgroup logic can according to the current state shielding of equipment by the step sequence operated; The startup of described One-key start-stop control system for fuel controls to comprise successively subsidiary engine in described BOP system and starts, the upper water of described waste heat boiler, the startup of described combustion engine is grid-connected, described bypass structure coordinates described waste heat boiler increasing temperature and pressure, the red switch of described steam turbine, warming-up and grid-connected, described Combined Cycle Unit according to the operating mode of boiler and steam turbine by given pace load up to basic load; Artificial judgment point and the confirmation point of described One-key start-stop control system for fuel all adopt a control mode for automatic Logic judgment; The startup control section employing time parameter of described One-key start-stop control system for fuel or on-line chemical analysis instrument parameter are directly introduced as the judgement to " Steam-water Quality is qualified " in steering logic.
Further, described time parameter is, in unit cold start after 2 hours, after warm/hot state starts 1 hour.
Further, the startup control section of described One-key start-stop control system for fuel, adopts following data as steam turbine from 870rpm red switch to the steering logic of 3000rpm automatic decision: intermediate pressure cylinder temperature meets X criterion and Z criterion simultaneously; All shaft vibrations during 870rpm, the numerical value that watt to shake are normal; During 870rpm, per pass bearing temperature is normal; Steam turbine warm-up period completes.
Further, the startup control section of described One-key start-stop control system for fuel, carries out waste heat boiler purging selectively; Be specially the situation being designed with logical record shutdown last time in One-key start-stop control system for fuel; Shut down if caused because of combustion engine trip reason last time, control system then thinks that waste heat boiler inside has the rock gas without burning to remain, then this combustion engine needs to purge before starting; If orderly closedown, then this combustion engine need not purge before starting.
Further, the startup control section of described One-key start-stop control system for fuel, on waste heat boiler water the injecting process in, bypass deaerating type of cycles and the synchronous water filling of condensation water heater, and using deaerator level as the mark filling water.
Further, described bypass structure comprises height, intermediate pressure by-pass, the inactive control of described One-key start-stop control system for fuel comprises the entry guide vane IGV minimum aperture of load shedding to described combustion engine successively, described steam turbine is shut down, continue the minimum load of load shedding to described Combined Cycle Unit, described combustion engine is shut down, and the subsidiary engine of described BOP system is shut down; The inactive control section of described One-key start-stop control system for fuel, after adopting combustion engine to shut down, waste heat boiler directly enters the method for heat-insulation pressure keeping pattern, after stopping using, close high, intermediate pressure by-pass in half an hour, and feed pump of stopping transport; And continue as the moisturizing of high, medium and low voltage drum in certain hour after a shutdown and maintain normal zero level.
Further, branched structure and/or redirect structure is all adopted in described unit cooperative level control module, described subgroup level control module; Be specially in described unit cooperative level control module and adopt branched structure, judge that Combined Cycle Unit belongs to cold conditions or hot starting, hot start operating mode according to the height of drum pressure; If cold start operating mode, then sequence walks straight-through branch, does not start feed pump and namely starts upper water; If hot starting, hot start operating mode, then sequence is first called feed pump and is opened sequence, then performs upper water subgroup control module.
Further, described subgroup level control module, described device level control module all adopt and row major calling logic; In same step sequence, perform the call operation of multiple described subgroup level control module or described device level control module, the execution enabled condition that final execution sequence controls mould by described subgroup level control module or described device level limits; Be specially Water flow-path on waste heat boiler, on subsidiary engine has started and possessed after water condition, perform the upper water subgroup control module of high, medium and low voltage simultaneously; The total upper water yield of three pressing systems and the mobile equilibrium of demineralized water maximum flow is maintained by the coordination of upper water total flow Dynamic Closed Loop Control.
Beneficial effect of the present invention:
One-key start-stop control system for fuel of the present invention is due to said structure and control design case, and its start-up course achieves Combined Cycle Unit from full cut-off to band at full capacity, and its stopping process achieves Combined Cycle Unit from full capacity to unit full cut-off.One-key start-stop control system for fuel covering scope of the present invention is wide and run through the start and stop overall process of Combined cycle gas-steam turbine unit, and all equipment controlled by DCS and TCS all include the range of control of One-key start-stop control system for fuel of the present invention in.
Specifically, One-key start-stop control system for fuel of the present invention achieve to start from combustion engine prepare, igniting, grid-connected, waste heat boiler hydrophobic dirt-removing increasing temperature and pressure, bypass coordinates increasing temperature and pressure, steam turbine admission condition meets and red switch, Combined Cycle Unit band initial load process, until press the whole start-up course of given pace application of load to basic load, and press given pace load shedding to entry guide vane IGV (inlet from combustion engine
guide vane) reach minimum aperture; steam turbine progressively cuts out pitch and shuts down; bypass coordinates shuts down maintenance high, medium and low voltage system pressure; combustion engine continues load shedding to minimum load; combustion engine shut down, waste heat boiler heat-insulation pressure keeping until subsidiary engine equipment downtime whole stopping process start & shutdown through one key control; the scope of the start and stop equipment that it relates to is extensively, the height of the automaticity of shutdown process; and the economy of shutdown process and security, be all greatly better than the One-key start-stop control system for fuel of any one Combined Cycle Unit existing.
The One-key start-stop control system for fuel of Combined cycle gas-steam turbine of the present invention achieves the safe and reliable start and stop of Combined Cycle Unit, the shutdown process of unit is cured to control system, prevent artificial maloperation, unit operation human intervention greatly reduces, and the reliability of unit improves greatly.
Be described further below with reference to the technique effect of accompanying drawing to design of the present invention, concrete structure and generation, to understand object of the present invention, characteristic sum effect fully.
Accompanying drawing explanation
Fig. 1 is the structural principle block diagram of One-key start-stop control system for fuel of the present invention.
Fig. 2 is the structural representation of One-key start-stop control system for fuel one specific embodiment of the present invention.
Fig. 3 is the Booting sequence block diagram of One-key start-stop control system for fuel of the present invention.
Fig. 4 is the stopping FB(flow block) of One-key start-stop control system for fuel of the present invention.
Fig. 5 is the FB(flow block) of water conservancy project skill on waste heat boiler in prior art.
Fig. 6 is the FB(flow block) of water conservancy project skill on waste heat boiler in One-key start-stop control system for fuel of the present invention.
Embodiment
The present invention is a kind of One-key start-stop control system for fuel of Combined cycle gas-steam turbine unit, and this Combined cycle gas-steam turbine unit has four units, and every platform unit is divided into again machine island, stove island and BOP system three parts.Wherein, machine island comprises combustion engine and combustion engine backup system, steam turbine and steam turbine backup system, generator and generator backup system; Stove island comprises waste heat boiler and backup system; Part except machine island, stove island is subordinate to BOP system.
The technological process of Combined cycle gas-steam turbine unit is decomposed into several bulks that combustion engine, generator, steam turbine, waste heat boiler etc. have relatively independent process.In the prior art of the art, the program control technology of combustion engine, steam turbine relative maturity and complete itself, therefore the key of the One-key start-stop control system for fuel of Combined Cycle Unit of the present invention is integrated the control of the control of waste heat boiler and BOP and combustion engine, steam turbine.
In one embodiment, the DCS (distributed controlsystem scattered control system) of Combined cycle gas-steam turbine unit and the Siemens T3000 system of TCS (turbine control system scattered control system) employing integration.Organic island, Lu Dao, BOP island are all unified by Siemens T3000 Systematical control.Being configured to of full factory T3000 control system: every a set of T3000 control system of platform unit is totally four covers; Synergic system is separately furnished with a set of T3000 control system.
The One-key start-stop control system for fuel (i.e. APS) of combustion and steam combustion engine Combined Cycle Unit of the present invention can be launched based on T3000 system.Obviously, the realization of One-key start-stop control system for fuel of the present invention is not limited to the T3000 system in the present embodiment, also can adopt other conventional systems in prior art.
One-key start-stop control system for fuel (APS) means whole-process automatic, proposes very high requirement to the automatic control system of Combined Cycle Unit.In the shutdown process of Combined Cycle Unit, the control stress point of APS is by reasonable and tight sequence control module, completes the safety of combustion engine, steam turbine, waste heat boiler and utility appliance and economic start and stop.One of key of APS is the seamless connection realizing sequence control module and closed-loop control, makes the loops such as water level adjustment, vapor pressure adjustment, the adjustment of steam steam temperature realize whole process in the start and stop stage and comes into operation automatically.
Any " Break point " is not established to be the difficult point place of APS in whole start-up course.For now, the start-up course of all Siemens Steam Turbines remains two " Break points " (artificial judgment point, confirmation point) all without any exception, and is all rely on artificial judgment.But the control program being substituted " artificial judgment " by " automatic decision " that the present invention proposes, makes unit operation more reliable, safer, more scientific, also extends the integrality of One-key start-stop control system for fuel.
As shown in Figure 1 and Figure 2, the One-key start-stop control system for fuel of Combined cycle gas-steam turbine unit of the present invention, its essence is the program control greatly of unit level, particularly, this One-key start-stop control system for fuel is step control structure, is followed successively by unit cooperative level control module, subgroup level control module and device level control module from upper strata toward lower floor.Owing to adopting modular design well arranged, all subgroup level control modules of unit DCS and TCS control will be subordinate to, the control module (or name " function group ") of such as steam turbine and steam turbine backup system, the control module, the control module of B of Unit OP, the control module of synergic system etc. of combustion engine, plan as a whole in a unit cooperative level control module, all automatically to drop into and without the need to the intervention of operations staff.
On the basis that three stage layered modules control, the present invention adopts the method for parallel calling in a large number, and subgroup level control module, device level control module all adopt and row major calling logic.Namely in same step sequence, perform the call operation of multiple subgroup level control module or device level control module, final execution sequence limits by the execution enabled condition of subgroup level control module or device level control module, to ensure technological requirement, decrease the stand-by period of equipment to greatest extent.
As shown in Figure 3, the startup control section of One-key start-stop control system for fuel of the present invention, comprise subsidiary engine in BOP system to start, steam turbine backup system starts, the upper water of waste heat boiler, the startup of combustion engine is grid-connected, described bypass structure coordinates waste heat boiler increasing temperature and pressure, the red switch of steam turbine, warming-up and grid-connected, Combined Cycle Unit presses given pace load up to basic load according to the operating mode of boiler and steam turbine, and adopts automatic Logic judgment to replace completely two " Break points " (artificial judgment point, confirmation point) of startup control procedure of the prior art.
Such as, " manually discharge " after qualified to Steam-water Quality and allow warming-up, and " manually discharging " steam turbine, from 870rpm red switch to 3000rpm this two " Break point ", adopts automatic Logic judgment to replace existing artificial judgment.
Particularly, one of breakpoint is the judgement to " Steam-water Quality is qualified ".Prior art is with qualified foundations for manual control judgement of sampling analysis report such as impurities in water content (iron-holder, silicon content).The present invention creatively proposes: after unit cold start after about 2 hours, warm/hot state start 1 hour, impurity content in water is just lower than setting, that is, judge as " qualified " in logic between the used time or on-line chemical analysis instrument parameter directly introduced judgement, to replace existing " artificial judgment ".
Two of breakpoint is that steam turbine is from 870rpm red switch to 3000rpm.Prior art must judge following several condition: 1. intermediate pressure cylinder temperature meets X criterion and Z criterion (restriction of steam turbine stress); 2. all shaft vibrations during 870rpm, the numerical value that watt to shake are normal; 3. during 870rpm, per pass bearing temperature is normal; 4. steam turbine warm-up period completes.And these conditions above-mentioned have embodiment in steering logic of the present invention, therefore, controlled condition that the present invention is also made into " automatic decision ".
In specifically implementing one, the technological requirement that One-key start-stop control system for fuel of the present invention starts according to combustion engine, the startup sequence of design combustion engine is as follows: first start combustion engine utility appliance: comprise startup and control oil and lubricating oil system, open compressor inlet baffle plate, open pneumatic plant anti-asthma valve, start rock gas draining system etc.; After combustion engine possesses entry condition, start converter plant SFC (static frequency convertor) and carry out boiler lifting selectively or drag combustion engine; Carry out point to fight raising speed to opening rock gas pitch during fire speed, after turn up 35Hz, inactive SFC, closes pneumatic plant anti-asthma valve after certain rotating speed; After combustion engine simultaneous interconnecting, combustion of natural gas is switched to premixed from diffusion.
Middle combustion engine of the present invention starts the original advantage of sequence compared with conventional method and is: carry out waste heat boiler purging selectively.The situation of logical record shutdown last time is designed with in One-key start-stop control system for fuel.Shut down if caused because of combustion engine trip reason last time, then think that waste heat boiler inside may have the rock gas without burning to remain, then this combustion engine needs to purge before starting.If orderly closedown, then this combustion engine need not purge before starting, and directly drags combustion engine light a fire after certain rotating speed by converter plant.The method, when the normal start and stop of unit, both can shorten the start-up time (purge time is 12 minutes) of unit, significantly can reduce again the plant consumption (SFC drags rated power 4MW) of start-up course.
Be illustrated in figure 4 the stopping control procedure of One-key start-stop control system for fuel of the present invention.The inactive control section of One-key start-stop control system for fuel of the present invention; comprise set auxiliary machinery equipment downtime before shutting down to prepare; load shedding is to the minimum aperture of entry guide vane IGV of combustion engine; steam turbine is shut down; continue the minimum load of load shedding to Combined Cycle Unit, combustion engine is shut down, waste heat boiler heat-insulation pressure keeping; steam turbine backup system is stopped transport, and the subsidiary engine of BOP system is stopped transport.
For difference with the prior art of the present invention is clearly described, be made as example with water control on waste heat boiler.Shown in Figure 5, Water flow-path on waste heat boiler conventional in prior art, after condensate water, feedwater and oxygen-eliminating device system start, call the moisturizing that subgroup control module (i.e. " sequence ") carries out low pressure, middle pressure, HP steam drum and economizer one by one, during main consideration cold start operating mode, boiler replenishing water amount is large, and demineralized water has little time to supplement, and condensate pump can be caused to trip because water level of thermal well is low.The method of prior art has inferior position in Combined Cycle Unit for when temperature, hot starting, hot start operating mode.When temperature, hot starting, hot start operating mode, for reducing drum up-draft gasifier, the upper discharge of single drum and economizer is little, and demineralized water make-up flow is underused.
As shown in Figure 6, Water flow-path on the waste heat boiler in One-key start-stop control system for fuel of the present invention, has started at subsidiary engine, after possessing upper water condition, performs the upper water subgroup control module (i.e. " sequence ") of high, medium and low voltage simultaneously.By the coordination of upper water total flow Dynamic Closed Loop Control, maintain the total upper water yield of three pressing systems and the mobile equilibrium of demineralized water maximum flow.
Therefore, it is consistent with conventional method always to go up the water time when One-key start-stop control system for fuel of the present invention both can ensure cold start operating mode, the water time on effectively shortening when temperature, hot starting, hot start operating mode again.
Further, for adapting to the multiple start and stop operating mode of unit, all adopting branched structure and/or redirect structure in unit cooperative level control module, subgroup level control module, making same sequence logic be applicable to different start and stop working condition requirements.
Simultaneously on the logical foundations of branched structure and redirect structure, for operations staff provides different start and stop degree to select, One-key start-stop control system for fuel of the present invention has boiler water filling, combustion engine igniting prepares, combined cycle starts three kinds of start-up mode, stops vacuum system, does not stop vacuum system two kinds of shutdown mode.
For calling of water supply system subgroup level control module: when cold start, without pressure in boiler, can water be transported in drum by condensate pump and deoxygenation thrust of pump; And when temperature, hot starting, hot start, in drum, pressure is higher, must start feed pump and can carry out moisturizing to drum.Feed pump is high-power (power of motor 2400KW) equipment, on drum, namely feed pump is started before water according to single-mode, the significant wastage of station service will be caused, therefore in unit cooperative level control module, adopt branched structure, judge that Combined Cycle Unit belongs to cold conditions or hot starting, hot start operating mode according to the height of drum pressure.If cold start operating mode, then sequence walks straight-through branch, does not start feed pump and namely starts upper water; If hot starting, hot start operating mode, then sequence is first called feed pump and is opened sequence, then performs upper water subgroup control module.
Further, for making One-key start-stop control system for fuel can perform from any operating point, in the sequence logic of unit cooperative level control module, subgroup level control module, all bypass structure is set.Namely subgroup level control module is when starting sequence without the need to performing the equipment full cut-off state that relates to from this subgroup, and subgroup logic can mask some step sequence according to the current state of equipment.Therefore, except repeating by except the step sequence that operates, the execution that also efficiently avoid some step sequence, on the impact of operational outfit, makes One-key start-stop control system for fuel of the present invention have more dirigibility.
For calling of water supply system subgroup level control module: because the different operating mode of cold and hot state is to the different requirements starting feed pump sequential, unit cooperative level control module can be called feed pump for twice and start sequence.When second time calls feed pump sequence, be provided with bypass condition, if existing feed pump is in running status, then no longer repeat start-up operation.Should not repeat is because feed pump starts front sequence need close all valves on export pipeline, adopts the mode opening pump of closing the door to prevent pipe vibration.If therefore perform again when feed pump runs and open pump sequence, then can cause the repetitive operation of related valve, and the upper aquaporin that interruption has been got through.
In addition, because One-key start-stop control system for fuel of the present invention adopts parallel logical organization, synchronization often has multiple subgroup level control module manipulating the equipment of unit, and operations staff cannot follow the tracks of one by one simultaneously check.Therefore, One-key start-stop control system for fuel of the present invention also comprises intelligent alarm system, take time-out to judge and/or status of equipment abnormal logic decision logic, for One-key start-stop control system for fuel provides abundant running state information, operations staff only need carry out tracking and process when there is abnormal alarm.
One-key start-stop control system for fuel also means whole-process automatic, has higher requirements to closed loop adjustment loop.Be different from the first manual operation of operations staff in prior art, after stable conditions, again closed loop is thrown automatic mode, One-key start-stop control system for fuel of the present invention is completed closed loop automatic switching by sequence with and guarantee controlled process parameter in safe range without large disturbances.The combined method realizing this function comprise become closed loop setting value, become PID Parameters in Closed-loop, shutdown process chooses other parameters as closed loop controlled volume, arrange the technological means such as the different pursuit gains of closed loop according to shutdown process Parameters variation.
For drum to water management, feedwater closed-loop control and sequence subgroup are coordinated to realize steam water-level whole-process automatic control: in the boiler water filling stage, the Water Level Control of Steam is switched to feedwater flow control mode by sequence, continues water on drum until close pitch after priming level by certain flow value.After combustion engine starting ignition, boiler opens the pressure stage: after drum starts to expand, sequence performs the operation of water level settings value trace actual value, the aperture of pitch only maintenance bond economizer minimum flow; After boiler continuation increasing temperature and pressure evaporation capacity reaches more than 20% or drum pressure ascending amount reaches certain definite value, then sequence judges that steam water-level expansion terminates, the pitch that will feed water controls no-harass switch and controls to normal zero level, and carries out the control mode switch of single pulse and three impulses.
Therefore One-key start-stop control system for fuel of the present invention achieves the automatic switching use of closed loop in shutdown process and guarantees not by the impact of human factor.
Further, One-key start-stop control system for fuel of the present invention also comprises boiler water filling programmed control.Adopt condensate pump and deoxygenation pump to be the mode of boiler water filling in cold conditions or warm state, when making the startup of feed pump postpone till combustion engine igniting, reduce the plant consumption in start-up course.Adopt HP steam drum pressure and deoxygenation pump discharge pressure difference to carry out judging whether to start water on feed pump, if hot time HP steam drum pressure higher, then water in being first, on low-pressure drum, restarting feed pump is water on HP steam drum.
Further, for improving rapidity and the economy of One-key start-stop control system for fuel of the present invention, Booting sequence adopts boiler high, medium and low voltage to go up the technique of water, start quickly speed simultaneously.One side is improved by process system increases demineralized water supply capacity, controls discharge and then control boiler on high, medium and low three pressure drums on the other hand respectively and always goes up discharge, make the upper water time shorten of waste heat boiler.
Further, One-key start-stop control system for fuel adopts in cold conditions or warm state the technique that condensate pump (power of motor 640KW) or deoxygenation pump (power of motor 200KW) are boiler water filling, when making the startup of feed pump postpone till combustion engine igniting.By reasonable arrangement and best of breed, the Program Synchronization that can carry out side by side is carried out.As bypass deaerating type of cycles above and solidifying adding system, original program can control to be about T.T. 390 minutes (cold conditions) by the present invention, what be optimized for parataxis program control foreshortens to 270 minutes T.T. (correspondingly, hot required time is the shortest about 40 minutes).
Open the feature of stopping two-shift operation night as regulating units day for Combined cycle gas-steam turbine unit, One-key start-stop control system for fuel of the present invention continues as the moisturizing of high, medium and low voltage drum in certain hour after a shutdown and maintains normal zero level.Namely the method can shorten moisturizing time during Combined Cycle Unit startup next day, can utilize again the accumulation of heat of boiler that hot water is filled into drum, reduce the drum wall temperature difference that moisturizing brings, and then the degree that when next time is started, load up speed limits by wall temperature difference reduces.
Described bypass structure of the present invention comprises height, intermediate pressure by-pass; after One-key start-stop control system for fuel adopts combustion engine to shut down, waste heat boiler enters the method for heat-insulation pressure keeping pattern as early as possible; high, intermediate pressure by-pass is closed in half an hour after stopping using; and feed pump of stopping transport; reduce the electric quantity consumption of subsidiary engine in stopping process, decreased again the loss of energy by heat-insulation pressure keeping.
Further, unit cooperative level control module is in inactive control, and some hours (general three hours) stoppage in transit feed pumps, can reduce station service power consumption rate effectively in advance.
In some embodiments of the invention, in the injecting process of Combined Cycle Unit, bypass deaerating type of cycles and the synchronous water filling of condensation water heater, and using deaerator level as the mark filling water.
In other embodiments of the present invention, in start-up course, when utilizing drum pressure to judge that unit is in cold conditions, select to replace water on feed pump with deoxygenation pump.
More than describe preferred embodiment of the present invention in detail.Should be appreciated that those of ordinary skill in the art just design according to the present invention can make many modifications and variations without the need to creative work.Therefore, all technician in the art, all should by the determined protection domain of claims under this invention's idea on the basis of existing technology by the available technical scheme of logical analysis, reasoning, or a limited experiment.
Claims (7)
1. an One-key start-stop control system for fuel for Combined cycle gas-steam turbine unit, described Combined Cycle Unit at least comprises combustion engine and combustion engine backup system, steam turbine and steam turbine backup system, also comprises waste heat boiler, BOP system and synergic system; Described One-key start-stop control system for fuel covers described combustion engine and combustion engine backup system, described steam turbine and steam turbine backup system, described waste heat boiler, described BOP system and described synergic system; Described One-key start-stop control system for fuel is step control structure, is followed successively by unit cooperative level control module, subgroup level control module and device level control module from upper strata toward lower floor; In the sequence logic of described unit cooperative level control module, subgroup level control module, all bypass structure is set; Namely subgroup level control module is when starting sequence without the need to performing the equipment full cut-off state that relates to from this subgroup, and subgroup logic can according to the current state shielding of equipment by the step sequence operated; The startup of described One-key start-stop control system for fuel controls to comprise successively subsidiary engine in described BOP system and starts, the upper water of described waste heat boiler, the startup of described combustion engine is grid-connected, described bypass structure coordinates described waste heat boiler increasing temperature and pressure, the red switch of described steam turbine, warming-up and grid-connected, described Combined Cycle Unit according to the operating mode of boiler and steam turbine by given pace load up to basic load; It is characterized in that: artificial judgment point and the confirmation point of described One-key start-stop control system for fuel all adopt a control mode for automatic Logic judgment; The startup control section employing time parameter of described One-key start-stop control system for fuel or on-line chemical analysis instrument parameter are directly introduced as the judgement to " Steam-water Quality is qualified " in steering logic.
2. One-key start-stop control system for fuel as claimed in claim 1, is characterized in that: described time parameter is, in unit cold start after 2 hours, after warm/hot state starts 1 hour.
3. One-key start-stop control system for fuel as claimed in claim 1, it is characterized in that: the startup control section of described One-key start-stop control system for fuel, adopt following data as steam turbine from 870rpm red switch to the steering logic of 3000rpm automatic decision: intermediate pressure cylinder temperature meets X criterion and Z criterion simultaneously; All shaft vibrations during 870rpm, the numerical value that watt to shake are normal; During 870rpm, per pass bearing temperature is normal; Steam turbine warm-up period completes.
4. One-key start-stop control system for fuel as claimed in claim 1, is characterized in that: the startup control section of described One-key start-stop control system for fuel, carries out waste heat boiler purging selectively; Be specially the situation being designed with logical record shutdown last time in One-key start-stop control system for fuel; Shut down if caused because of combustion engine trip reason last time, control system then thinks that waste heat boiler inside has the rock gas without burning to remain, then this combustion engine needs to purge before starting; If orderly closedown, then this combustion engine need not purge before starting.
5. One-key start-stop control system for fuel as claimed in claim 1, it is characterized in that: described bypass structure comprises height, intermediate pressure by-pass, the inactive control of described One-key start-stop control system for fuel comprises the entry guide vane IGV minimum aperture of load shedding to described combustion engine successively, described steam turbine is shut down, continue the minimum load of load shedding to described Combined Cycle Unit, described combustion engine is shut down, and the subsidiary engine of described BOP system is shut down; The inactive control section of described One-key start-stop control system for fuel, after adopting combustion engine to shut down, waste heat boiler directly enters the method for heat-insulation pressure keeping pattern, after stopping using, close high, intermediate pressure by-pass in half an hour, and feed pump of stopping transport; And continue as the moisturizing of high, medium and low voltage drum in certain hour after a shutdown and maintain normal zero level.
6. One-key start-stop control system for fuel as claimed in claim 1, is characterized in that: all adopt branched structure and/or redirect structure in described unit cooperative level control module, described subgroup level control module; Be specially in described unit cooperative level control module and adopt branched structure, judge that Combined Cycle Unit belongs to cold conditions or hot starting, hot start operating mode according to the height of drum pressure; If cold start operating mode, then sequence walks straight-through branch, does not start feed pump and namely starts upper water; If hot starting, hot start operating mode, then sequence is first called feed pump and is opened sequence, then performs upper water subgroup control module.
7. One-key start-stop control system for fuel as claimed in claim 1, is characterized in that: described subgroup level control module, described device level control module all adopt and row major calling logic; In same step sequence, perform the call operation of multiple described subgroup level control module or described device level control module, the execution enabled condition that final execution sequence controls mould by described subgroup level control module or described device level limits; Be specially Water flow-path on waste heat boiler, on subsidiary engine has started and possessed after water condition, perform the upper water subgroup control module of high, medium and low voltage simultaneously; The total upper water yield of three pressing systems and the mobile equilibrium of demineralized water maximum flow is maintained by the coordination of upper water total flow Dynamic Closed Loop Control.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103324162B (en) * | 2013-05-24 | 2017-03-29 | 国家电网公司 | The method for optimally controlling of three operation equipment |
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| CN110298534A (en) * | 2019-05-09 | 2019-10-01 | 华电电力科学研究院有限公司 | F grades of gas-steam combined circulating generation unit energy consumption index on-line monitorings and power consumption analysis method |
| CN110593974B (en) * | 2019-10-31 | 2022-05-27 | 大唐郓城发电有限公司 | Automatic start-stop control system of unit |
| CN113082990B (en) * | 2021-04-09 | 2023-05-30 | 浙江菲达环保科技股份有限公司 | One-key start-stop method and system for full-load section of desulfurization system |
| CN113374680B (en) * | 2021-06-18 | 2022-05-06 | 国家石油天然气管网集团有限公司西气东输分公司 | Compressor unit combined operation control method and system |
| CN114076006A (en) * | 2021-11-09 | 2022-02-22 | 国电投周口燃气热电有限公司 | Generating set intelligence opens and stops system based on APS controller |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102080579A (en) * | 2010-12-10 | 2011-06-01 | 中国广东核电集团有限公司 | Method and device for controlling starting and stopping of turbo generator set of nuclear power plant, and digital control system (DCS) |
| CN202230373U (en) * | 2011-09-16 | 2012-05-23 | 上海申能临港燃机发电有限公司 | Automatic power plant start up & shut down system of gas-steam combined cycle unit |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3716188B2 (en) * | 2001-04-10 | 2005-11-16 | 三菱重工業株式会社 | Gas turbine combined plant |
-
2011
- 2011-09-16 CN CN201110276121.5A patent/CN102393688B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102080579A (en) * | 2010-12-10 | 2011-06-01 | 中国广东核电集团有限公司 | Method and device for controlling starting and stopping of turbo generator set of nuclear power plant, and digital control system (DCS) |
| CN202230373U (en) * | 2011-09-16 | 2012-05-23 | 上海申能临港燃机发电有限公司 | Automatic power plant start up & shut down system of gas-steam combined cycle unit |
Non-Patent Citations (3)
| Title |
|---|
| M701F单轴燃气-蒸汽联合循环机组的运行;贾文;《发电设备》;20090315(第2期);第98-103页 * |
| 梁朝等.燃气-蒸汽联合循环机组自动起停控制系统(APS)的应用.《热力发电》.2009,第38卷(第10期),第58-60页. * |
| 西门子9F联合循环机组自启停功能的应用;冯偶根等;《浙江电力》;20100225(第2期);第40-42、45页 * |
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