CN104633638A - Comprehensive control method for function of machine halt without boiler shutdown in power plant FCB - Google Patents
Comprehensive control method for function of machine halt without boiler shutdown in power plant FCB Download PDFInfo
- Publication number
- CN104633638A CN104633638A CN201410727011.XA CN201410727011A CN104633638A CN 104633638 A CN104633638 A CN 104633638A CN 201410727011 A CN201410727011 A CN 201410727011A CN 104633638 A CN104633638 A CN 104633638A
- Authority
- CN
- China
- Prior art keywords
- fcb
- actuating signal
- pressure
- boiler
- water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Abstract
The invention relates to a comprehensive control method for the function of machine halt without boiler shutdown in a power plant FCB. The comprehensive control method mainly comprises the steps of the triggering condition and the reset condition of FCB actuating signals, the control process of all subsystems of a unit when the FCB actuating signals are generated, and the process about how to ensure that the unit is safely, stably and quickly restored to be in a grid-connected state after the FCB actuating signals are generated. The comprehensive control method can be applied to any DCS control system, through the control strategy, under the working condition that a steam turbine trips or an electric generator trips, it is guaranteed that a boiler does not shut down, and the unit is made to be quickly connected into a grid again. The cost for restarting the boiler is saved, the service life loss caused by starting and stopping of the boiler is reduced, and the service life of the boiler is prolonged. Meanwhile, the automation degree of the system is also improved, the economic cost is lowered, and the application prospect is limitless.
Description
Technical field
the invention belongs to the technical field of power plant units control method; particularly relate to the integrated control method of the shutdown not blowing out function of power plant FCB; be specially thermal power plant's Turbo-generator Set when steam turbine tripping operation or generator tripping, how ensure that boiler keeps minimum steady combustion load continue stable operation and how to recover unit load safe and stable operation fast.
background technology:
current most domestic Large Copacity fired power generating unit does not possess FCB function, only has a few power plant to consider FCB function at the design initial stage.FCB has three types: (1) generator generation external fault, and as low frequency, step-out etc., steam turbine does not trip, and band station service load continues to run; (2) transformer unit internal fault connection jumps steam turbine or steam turbine fault trip, and boiler keeps steady combustion; (3) there is some fault in generator, as overvoltage etc., and generator tripping, but steam turbine does not trip.The present invention is mainly for the second type of FCB; namely steam turbine due to generator off-the-line during certain fault generation trip accident or generator due to certain protection or other reasons tripping operation or off-the-line time; steam turbine intertripping; at this moment boiler does not stop working; can fast cutback, reduce boiler combustion rate, maintain minimum steady combustion load; keep main vapour parameter stability, can be again grid-connected fast according to grid requirements.The integrated control method of this shutdown not blowing out can under steam turbine tripping operation causes the operating mode of unit trip or generator tripping intertripping steam turbine; make unit again grid-connected fast; save the cost that boiler restarts; decrease the life consumption that boiler causes due to start and stop; extend the service life of boiler; substantially increase the automaticity of system, the fast quick-recovery of electrical network is played a key effect simultaneously.
summary of the invention:
The present invention is directed to above-mentioned problems of the prior art, provide a kind of integrated control method of shutting down not blowing out.Its objective is that under the operating mode of off-grid off-the-line or generator off-the-line, boiler does not stop working in steam turbine tripping operation in order to ensure Turbo-generator Set, can fast cutback, reduce boiler combustion rate, maintain minimum steady combustion load, keep main vapour parameter stability, can be again grid-connected fast according to grid requirements.
The technical solution adopted for the present invention to solve the technical problems is:
The integrated control method of the shutdown not blowing out function of power plant FCB, mainly comprise: the trigger condition of FCB actuating signal and reset condition, the control procedure of each subsystem of FCB actuating signal occurrence time group, how FCB actuating signal ensures unit safety, stablizes, returns to fast and net state after occurring;
The trigger condition of described FCB actuating signal and reset condition, comprise in following terms and conditions any one or a few:
(1) capital equipment is without significant deficiency; Operating mechanism is flexible; Main and auxiliary machine normal operation;
(2) DCS system is working properly, and history station is working properly, and main supervisory instrument is qualified through verifying, and instruction accurately;
(3) the various main protection loop of unit ensures that 100% puts into operation, and all safety action is reliable;
(4) boiler combustion management system, steam turbine safety monitoring system, deaerator level and high and lowly add water level protection, relevant steam turbine, the boiler thermal technology such as steam turbine prevents water enter preventing, subsidiary engine interlock protection automatically, protection, the device such as interlocking adjust data correctly, action is normal;
(5) TURBINE OVERSPEED PROTECTION DEVICE is good, and electricity exceeds the speed limit, mechanical overspeed protection working value should in 110% nominal speed range;
(6) each section of non-return flap interlocking action of drawing gas is correct, and close reliable rapidly, the shut-in time is qualified, and each hydrophobic valve switch is good;
(7) vacuum breaking door switch is handy, reliable in action;
(8) grease pump, jacking(oil) pump are in good stand-by state;
(9) EH oil system is working properly, reliable;
(10) boiler safety door, Pcv valve are through pass the test, reliable in action;
(11) oxygen-eliminating device and packing standby steam source and to switch facility reliable;
(12) steam turbine prevents water enter preventing measuring point accurate;
(13) high and low pressure bypath system is in good condition, and has enough capacity, and can ensure to drop at any time;
(14) main-generator breaker and degaussing switch are jumped and are closed normally;
(15) station-service DC power-supply system is in serviceable condition, and failure power system is infallible through certification test.Diesel-driven generator is in serviceable condition, through the requirement of emergency start agreement with experimental;
(16) station service fast switching device is working properly;
(17) each bear vibration of unit is in acceptability limit;
(18) external electrical network normal operation, without outer net off-grid phenomenon; The control procedure of described each subsystem of FCB actuating signal occurrence time group, to comprise in this system comprise whole control procedures that following subsystem controls:
(1) boiler Pcv valve should when FCB actuating signal occurs, and main steam pressure higher than certain certain value and main steam flow is greater than certain certain value time chainly to open, chain closedown after main steam pressure drops to certain certain value, if when system has two and an above Pcv valve, can open during pressure height simultaneously, when pressure falls after rise, every two valves should close (the concrete time is depending on different system) by a few seconds in interval, are conducive to the stable operation of boiler water system like this;
(2) fuel master control is when FCB actuating signal occurs, fuel quantity reduces to about 50% of nominal fuel amount immediately, generally by stopping coal pulverizer realizing, as stopping several coal pulverizers, depending on different systems, principle is exactly that fuel quantity is kept to boiler minimum steady combustion load, when stopping coal pulverizer simultaneously, should about the seconds of interval 5 between two coal pulverizers, it is just passable that the coal pulverizer that residue is run can maintain minimum steady combustion load, like this can stable operation, need not oil reservoir be started again combustion-supporting;
(3) FCB actuating signal triggers RB actuating signal after occurring immediately, during this period, the coal-supplying amount of the coal pulverizer that residue is run remains unchanged, actuating signal transfers normal regulating to after disappearing again, run simultaneously in the quick shutdown protection of coal pulverizer " feeder confirm to run after the primary air flow of coal pulverizer be less than certain certain value; shut down after time delay certain hour " this, delay time should be appropriate prolongation, depending on concrete system, about about 10 seconds, the stable operation of pulverized coal preparation system can be ensured like this;
(4) after FCB actuating signal occurs, in order to the safety of system, MFT actuating signal can be triggered when meeting some requirements, after any one below in three kinds of conditions meets, all will trigger MFT signal, when a:FCB does not drop into, if during steam turbine tripping operation, unit load is greater than the operating mode of certain certain value; When b:FCB actuating signal occurs, the operating mode of high side valve quick closedown; After 5 seconds occurred c:FCB actuating signal, if when main steam pressure is higher than certain certain value, high side valve aperture is still less than the operating mode of certain certain value;
(5) bypath system: high pressure turbine by controls main vapour pressure, low voltage bypass controls reheater pressure, after FCB actuating signal occurs, the pressure set points of high pressure turbine by control loop slowly declines, final setting value maintains within the scope of 62% rated pressure to 67% rated pressure, and the moment that FCB actuating signal occurs, a few seconds (the concrete time is depending on different system) opened automatically soon by high pressure turbine by control valve and heavy pressure by-pass cooling water control valve, then automatically drop into automatically, high pressure turbine by governor valve control main steam pressure, Desuperheating water regulating valve controls main steam temperature, in the moment of FCB action, in order to ensure unit safety, if high other desuperheating water isolating door is still in closed condition or high other Desuperheating water regulating valve aperture when being less than 5%, the protection after time delay a few second of high other control valve is closed, low voltage bypass regulating loop is after FCB actuating signal occurs, about pressure set points finally maintains 50% rated pressure, and the moment that FCB actuating signal occurs, a few seconds (the concrete time is depending on different system) opened automatically soon by low voltage bypass control valve and low-pressure by pass temperature-lowering water control valve, then low voltage bypass control valve opening is down to 60%, then start to regulate reheater pressure, low-pressure by pass temperature-lowering water governor valve control temperature, in FCB action moment, in order to ensure unit safety, if low other desuperheating water isolating door is still in closed condition or low other Desuperheating water regulating valve aperture when being less than 5%, low voltage bypass control valve cuts out in protection after a few time delay in second,
(6) Attemperation water system: when FCB actuating signal occurs, one-level desuperheating water, secondary desuperheating water and reheater Desuperheating water regulating valve close certain hour automatically, regulate Stream temperature degree at different levels afterwards according to setting curve;
(7), when FCB actuating signal occurs, boiler master is cut to Non-follow control, and unit exits coordinated control mode; Turbine main control positive closing speed regulation valve of steam turbine certain hour simultaneously, the concrete time, depending on different system, can reduce load so fast, is conducive to the stable of unit main steam pressure, also can shortens the time of origin of RB actuating signal;
(8) when FCB actuating signal occurs, the overflow control valve of gland seal system should cut out, and auxiliary vapour is to shaft seal control valve and coldly should be in auto state to shaft seal control valve again, can ensure the stable of gland seal system like this;
(9), when FCB actuating signal occurs, heat keeps original position certain hour to auxiliary vapour adjustment doors again, depending on concrete system, and the then auxiliary vapour main-piping pressure of normal regulating; Auxiliary vapour should drop into automatic running status during this period to oxygen-eliminating device adjustment doors, regulates oxygen-eliminating device pressure;
(10) after FCB actuating signal occurs, water supply system there will be very great fluctuation process, if drum boiler, steam water-level has very great fluctuation process, if Once-through Boiler, feedwater flow there will be very great fluctuation process, and this just requires that feedwater control needs to keep three blunt quantity control, can better ensure the stable of water system like this; Must ensure during this that water supply system is in the automatic method of operation, no matter be electric pump or heat pump, rotating speed deviation is cut greatly manual value and should suitably be relaxed, delay time also should suitably relax, what the definite value of steam water-level chaser or feedwater flow chaser during this period should be suitable simultaneously relaxes a bit, false information is taken into account, because steam water-level or feedwater flow all can occur temporary transient false information;
(11) when FCB actuating signal occurs, condenser water level adjusting door standard-sized sheet, different depending on concrete system wide-open time, about about 10 seconds, transfer normal regulating condenser water level afterwards to, during this, the condenser water yield has very large consumption, is so more conducive to ensureing the stable of condensate system;
(12) disconnect for a certain reason if there is external electrical network, and main-generator breaker does not have the phenomenon of tripping, at this moment in order to ensure the safety of whole unit, must trigger FCB actuating signal, if FCB does not drop into, just triggers MFT actuating signal.Domestic unit all can have special device to judge that whether external electrical network is normal, then give generator feedback signals, and external unit generally all do not have this device, so once there is outer net off-grid phenomenon, generator can not receive trip command, actual load has been zero, and coordinated control system can think that current loads is lower than setting value, and can continue increases fuel quantity, pressure and temps etc. all can increase rapidly, abnormally dangerous, and steam turbine also there will be hypervelocity phenomenon, so must increase this protection;
(13) other system keeps the original method of operation constant, and all devices all drops into the automatic method of operation;
How described FCB actuating signal ensures unit safety, stablizes, returns to fast and net state after occurring, comprise:: the state of system or the function that has before FCB actuating signal occurs, the state of each system during generation, until return to and the state of all subsystems after net state during this; Also comprise after following FCB actuating signal completes, the control of each subsystem during the grid-connected load of fast quick-recovery:
(1) if water supply system is steam feed pump, after FCB action completes, the vapour source of steam feed pump will automatically switch to cold steam supply again, should note observing heat pump fluctuation of speed situation, notes abnormalities and takes measures in time;
(2) note observing Pcv valve state, vapour pressure Gao Shiru does not open, and answers manual unlocking;
(3) if hot-air damper is not closed after coal pulverizer tripping operation, should emergency cut-off on the spot, prevent Boiler combustion;
(4) if bypath system strenuous vibration, should manual-lock height collateral line unite immediately;
(5) during action once boiler extinguishment, answer strict implement furnace purge program, can again light a fire;
(6) once boiler extinguishment, the anticipation of boiler super high pressure accident is carried out.
Comprise operating mode: steam turbine trips for a certain reason, cascading trip generator, thus make unit trip, at this moment boiler maintains minimum steady combustion load continuation stable operation, at any time can according to grid requirements again grid-connected on-load; Generator trips for a certain reason, cascading trip steam turbine, thus makes unit trip, and at this moment boiler maintains minimum steady combustion load continuation stable operation, at any time can according to grid requirements again grid-connected on-load.
Comprise special operation condition: the device whether outer net normally works does not detect in power plant, namely there is off-grid phenomenon for a certain reason in outer net, when generator is without any feedback, once outer net breaks down, in order to the safety and stability of unit, this situation also triggers FCB actuating signal, if FCB does not drop into, just triggers MFT actuating signal.
Advantage of the present invention and beneficial effect:
(1) reducing people is manual operation, improves unit operating efficiency, also improves the automaticity of system simultaneously;
(2) boiler losses is reduced, the service life of prolonged boiler;
(3) economize energy, meets environmental protection overall consciousness;
(4) ensure that unit is after shutdown of breaking down, grid-connected load carrying again, is conducive to the safe and stable operation of whole electrical network fast.
The present invention can be applied in any DCS control system, by this control strategy, can steam turbine tripping operation or generator tripping operating mode under, ensure that boiler does not stop working, make unit again grid-connected fast, saved the cost that boiler restarts, decrease the life consumption that boiler causes due to start and stop, extend the service life of boiler, also improve the automaticity of system simultaneously, its financial cost reduced and application prospect are limitless.
accompanying drawing illustrates:
Fig. 1 is trigger condition and the reset condition of FCB actuating signal of the present invention;
Fig. 2 is the control mode of Pcv valve of the present invention;
Fig. 3 is the relation between FCB actuating signal and main protection of boiler MFT actuating signal;
Fig. 4 is the relation between FCB actuating signal and RB actuating signal.
detailed description of the invention:
Embodiment 1:
When FCB actuating signal occurs, propose its control thought or control mode for different system, ensure that unit each subsystem can be run according to the mode designed, thus realize unit safety stable be transitioned into next operating mode.
Concrete control logic or control thinking are:
The function that the conditioned disjunction that whole Turbo-generator Set should possess has:
(1) capital equipment is without significant deficiency; Operating mechanism is flexible; Main and auxiliary machine normal operation;
(2) DCS system is working properly, and history station is working properly, and main supervisory instrument is qualified through verifying, and instruction accurately;
(3) the various main protection loop of unit ensures that 100% puts into operation, and all safety action is reliable;
(4) boiler combustion management system, steam turbine safety monitoring system, deaerator level and high and lowly add water level protection, relevant steam turbine, the boiler thermal technology such as steam turbine prevents water enter preventing, subsidiary engine interlock protection automatically, protection, the device such as interlocking adjust data correctly, action is normal;
(5) TURBINE OVERSPEED PROTECTION DEVICE is good, and electricity exceeds the speed limit, mechanical overspeed protection working value should in 110% nominal speed range;
(6) each section of non-return flap interlocking action of drawing gas is correct, and close reliable rapidly, the shut-in time is qualified, and each hydrophobic valve switch is good;
(7) vacuum breaking door switch is handy, reliable in action;
(8) grease pump, jacking(oil) pump are in good stand-by state;
(9) EH oil system is working properly, reliable;
(10) boiler safety door, Pcv valve are through pass the test, reliable in action;
(11) oxygen-eliminating device and packing standby steam source and to switch facility reliable;
(12) steam turbine prevents water enter preventing measuring point accurate;
(13) high and low pressure bypath system is in good condition, and has enough capacity, and can ensure to drop at any time;
(14) main-generator breaker and degaussing switch are jumped and are closed normally;
(15) station-service DC power-supply system is in serviceable condition, and failure power system is infallible through certification test.Diesel-driven generator is in serviceable condition, through the requirement of emergency start agreement with experimental;
(16) station service fast switching device is working properly;
(17) each bear vibration of unit is in acceptability limit;
The control thought of each subsystem of unit during FCB action:
(1) boiler Pcv valve should when FCB actuating signal occurs, and main steam pressure higher than certain certain value and main steam flow is greater than certain certain value time chainly to open, chain closedown after main steam pressure drops to certain certain value, if when system has two and an above Pcv valve, can open during pressure height simultaneously, when pressure falls after rise, every two valves should close (the concrete time is depending on different system) by a few seconds in interval, are conducive to the stable operation of boiler water system like this;
(2) fuel master control is when FCB actuating signal occurs, fuel quantity reduces to about 50% of nominal fuel amount immediately, generally by stopping coal pulverizer realizing, as stopping several coal pulverizers, depending on different systems, principle is exactly that fuel quantity is kept to boiler minimum steady combustion load, when stopping coal pulverizer simultaneously, should about the seconds of interval 5 between two coal pulverizers, it is just passable that the coal pulverizer that residue is run can maintain minimum steady combustion load, like this can stable operation, need not oil reservoir be started again combustion-supporting;
(3) FCB actuating signal triggers RB actuating signal after occurring immediately, during this period, the coal-supplying amount of the coal pulverizer that residue is run remains unchanged, actuating signal transfers normal regulating to after disappearing again, run simultaneously in the quick shutdown protection of coal pulverizer " feeder confirm to run after the primary air flow of coal pulverizer be less than certain certain value; shut down after time delay certain hour " this, delay time should be appropriate prolongation, depending on concrete system, about about 10 seconds, the stable operation of pulverized coal preparation system can be ensured like this;
(4) after FCB actuating signal occurs, in order to the safety of system, MFT actuating signal can be triggered when meeting some requirements, after any one below in three kinds of conditions meets, all will trigger MFT signal, when a:FCB does not drop into, if during steam turbine tripping operation, unit load is greater than the operating mode of certain certain value; When b:FCB actuating signal occurs, the operating mode of high side valve quick closedown; After 5 seconds occurred c:FCB actuating signal, if when main steam pressure is higher than certain certain value, high side valve aperture is still less than the operating mode of certain certain value;
(5) bypath system: high pressure turbine by controls main vapour pressure, low voltage bypass controls reheater pressure, after FCB actuating signal occurs, the pressure set points of high pressure turbine by control loop slowly declines, final setting value maintains within the scope of 62% rated pressure to 67% rated pressure, and the moment that FCB actuating signal occurs, a few seconds (the concrete time is depending on different system) opened automatically soon by high pressure turbine by control valve and heavy pressure by-pass cooling water control valve, then automatically drop into automatically, high pressure turbine by governor valve control main steam pressure, Desuperheating water regulating valve controls main steam temperature, in the moment of FCB action, in order to ensure unit safety, if high other desuperheating water isolating door is still in closed condition or high other Desuperheating water regulating valve aperture when being less than 5%, the protection after time delay a few second of high other control valve is closed, low voltage bypass regulating loop is after FCB actuating signal occurs, about pressure set points finally maintains 50% rated pressure, and the moment that FCB actuating signal occurs, a few seconds (the concrete time is depending on different system) opened automatically soon by low voltage bypass control valve and low-pressure by pass temperature-lowering water control valve, then low voltage bypass control valve opening is down to 60%, then start to regulate reheater pressure, low-pressure by pass temperature-lowering water governor valve control temperature, in FCB action moment, in order to ensure unit safety, if low other desuperheating water isolating door is still in closed condition or low other Desuperheating water regulating valve aperture when being less than 5%, low voltage bypass control valve cuts out in protection after a few time delay in second,
(6) Attemperation water system: when FCB actuating signal occurs, one-level desuperheating water, secondary desuperheating water and reheater Desuperheating water regulating valve close certain hour automatically, regulate Stream temperature degree at different levels afterwards according to setting curve;
(7), when FCB actuating signal occurs, boiler master is cut to Non-follow control, and unit exits coordinated control mode; Turbine main control positive closing speed regulation valve of steam turbine certain hour simultaneously, the concrete time, depending on different system, can reduce load so fast, is conducive to the stable of unit main steam pressure, also can shortens the time of origin of RB actuating signal;
(8) when FCB actuating signal occurs, the overflow control valve of gland seal system should cut out, and auxiliary vapour is to shaft seal control valve and coldly should be in auto state to shaft seal control valve again, can ensure the stable of gland seal system like this;
(9), when FCB actuating signal occurs, heat keeps original position certain hour to auxiliary vapour adjustment doors again, depending on concrete system, and the then auxiliary vapour main-piping pressure of normal regulating; Auxiliary vapour should drop into automatic running status during this period to oxygen-eliminating device adjustment doors, regulates oxygen-eliminating device pressure;
(10) after FCB actuating signal occurs, water supply system there will be very great fluctuation process, if drum boiler, steam water-level has very great fluctuation process, if Once-through Boiler, feedwater flow there will be very great fluctuation process, and this just requires that feedwater control needs to keep three blunt quantity control, can better ensure the stable of water system like this; Must ensure during this that water supply system is in the automatic method of operation, no matter be electric pump or heat pump, rotating speed deviation is cut greatly manual value and should suitably be relaxed, delay time also should suitably relax, what the definite value of steam water-level chaser or feedwater flow chaser during this period should be suitable simultaneously relaxes a bit, false information is taken into account, because steam water-level or feedwater flow all can occur temporary transient false information;
(11) when FCB actuating signal occurs, condenser water level adjusting door standard-sized sheet, different depending on concrete system wide-open time, about about 10 seconds, transfer normal regulating condenser water level afterwards to, during this, the condenser water yield has very large consumption, is so more conducive to ensureing the stable of condensate system;
(12) disconnect for a certain reason if there is external electrical network, and main-generator breaker does not have the phenomenon of tripping, at this moment in order to ensure the safety of whole unit, must trigger FCB actuating signal, if FCB does not drop into, just triggers MFT actuating signal.Domestic unit all can have special device to judge that whether external electrical network is normal, then give generator feedback signals, and external unit generally all do not have this device, so once there is outer net off-grid phenomenon, generator can not receive trip command, actual load has been zero, and coordinated control system can think that current loads is lower than setting value, and can continue increases fuel quantity, pressure and temps etc. all can increase rapidly, abnormally dangerous, and steam turbine also there will be hypervelocity phenomenon, so must increase this protection;
(13) other system keeps the original method of operation constant, and all devices all drops into the automatic method of operation.
After FCB actuating signal completes, the control thought of each subsystem during the grid-connected load of fast quick-recovery:
(1) if water supply system is steam feed pump, after FCB action completes, the vapour source of steam feed pump will automatically switch to cold steam supply again, should note observing heat pump fluctuation of speed situation, notes abnormalities and takes measures in time;
(2) note observing Pcv valve state, vapour pressure Gao Shiru does not open, and answers manual unlocking;
(3) if hot-air damper is not closed after coal pulverizer tripping operation, should emergency cut-off on the spot, prevent Boiler combustion;
(4) if bypath system strenuous vibration, should manual-lock height collateral line unite immediately;
(5) during action once boiler extinguishment, answer strict implement furnace purge program, can again light a fire;
(6) once boiler extinguishment, the anticipation of boiler super high pressure accident is carried out.
Described application system comprises: all DCS control systems, such as: the dark control system of state's electricity intelligence, ABB control system, Hollysys's control system, FOXBRO control system, Siemens control system etc.;
Range of application comprises all kinds unit: such as 300,000 drum boilers, 1,000,000 Once-through Boilers, 600,000 drum boilers etc.
Accompanying drawing comprises Fig. 1, Fig. 2, Fig. 3 and Fig. 4.Below in conjunction with the drawings and the specific embodiments, the present invention is further detailed explanation.
This product is mainly by being defined as various different input signal the various status signals of equipment, these input signals are through the reorganization of the logic such as "AND", "or", " non-", according to control thought or the control logic of design, instruction is sent by output signal, realize various different, the complicated action relationships between equipment, thus make system have various different function.In use, only need the name of input signal according to existing system to rename, the logical symbol that various relation existing system provides is showed just passable simultaneously.
As shown in Figure 1, the trigger condition of main explanation FCB actuating signal and reset condition, especially it is to be noted that: if power plant can not judge that outer net is whether normal, prevent outer net suspension from causing the accident, whether trigger condition must increase an outer net and protect normally, can judge with turbine speed, if unit and net state, and when steam turbine reaches OPC rotating speed, just trigger FCB actuating signal, if FCB does not drop into, just trigger MFT actuating signal; If power plant has judge the whether normal device of outer net, when can give generator feedback signals, trigger condition just need not increase this and protect.
Fig. 2 mainly controls the course of action of Pcv valve, after FCB occurs, bypass can be opened fast, lay down pressure, but due to bypass be not 100% capacity, so when pressure is higher than certain certain value, Pcv valve should be opened automatically, when pressure falls back to lower than certain certain value, Pcv valve in automatic closedown, the safety of such guarantee unit.
Fig. 3 mainly illustrates the relation between FCB actuating signal and MFT actuating signal; that is: when FCB protection drops into; if FCB action can not trigger MFT action; if when FCB does not drop into; MFT action will be triggered after action; can ensure that unit can both safety and stability under any operating mode like this, and can the most low consumed operation be accomplished.
Fig. 4 mainly illustrates the relation between FCB actuating signal and RB actuating signal, if load is greater than certain certain value, FCB will trigger RB actuating signal after triggering, and is so more conducive to the stability of unit fast cutback and unit.
Bypass Control System, gland seal system, Attemperation water system, water supply system, condensate system, fuel management system, Auxiliary Steam and pulverized coal preparation system control according to the control thought proposed in invention, after FCB actuating signal completes, comprise these systems and other system continues to maintain stable operation according to original mode.
Steam turbine trips after intertripping generator or generator tripping intertripping steam turbine, trigger the shutdown not blowing out actuating signal of FCB, after FCB action, boiler triggers RB action, at this moment boiler master is cut to manually, combustion rate is down to 50% Coal-fired capacity automatically, coal pulverizer retains the number of units that can maintain minimum steady combustion load, and the coal pulverizer of tripping operation successively interval 5s excises; When main steam pressure is higher than certain value, boiler ERV valve (Pcv valve) is opened simultaneously automatically, and main vapour pressure is lower than after certain value, and a few seconds in ERV valve (Pcv valve) interval is closed successively; The automatic Close All of desuperheating water pitch; High pressure turbine by controls main vapour pressure, and pressure definite value slowly declines, and the final setting value of pressure is about 60% nominal steam pressure, high pressure turbine by pressure-regulating valve and desuperheat water valve open a few second automatically soon, the concrete time, depending on different system, then automatically drops into automatically, regulates pressure and temperature; Low lateral pressure adjustment doors and low other desuperheat water valve open a few second automatically soon, and the concrete time, then low other pressure-reducing valve was down to 60%, starts afterwards to regulate temperature, pressure depending on different system.The follow-up reforwarding row of parameter stability, at this moment can according to grid requirements grid-connected on-load again at any time.
Claims (3)
1. the integrated control method of the shutdown not blowing out function of power plant FCB, it is characterized in that, mainly comprise: the trigger condition of FCB actuating signal and reset condition, the control procedure of each subsystem of FCB actuating signal occurrence time group, how FCB actuating signal ensures unit safety, stablizes, returns to fast and net state after occurring;
The trigger condition of described FCB actuating signal and reset condition, comprise in following terms and conditions any one or a few:
(1) capital equipment is without significant deficiency; Operating mechanism is flexible; Main and auxiliary machine normal operation;
(2) DCS system is working properly, and history station is working properly, and main supervisory instrument is qualified through verifying, and instruction accurately;
(3) the various main protection loop of unit ensures that 100% puts into operation, and all safety action is reliable;
(4) boiler combustion management system, steam turbine safety monitoring system, deaerator level and high and lowly add water level protection, relevant steam turbine, the boiler thermal technology such as steam turbine prevents water enter preventing, subsidiary engine interlock protection automatically, protection, the device such as interlocking adjust data correctly, action is normal;
(5) TURBINE OVERSPEED PROTECTION DEVICE is good, and electricity exceeds the speed limit, mechanical overspeed protection working value should in 110% nominal speed range;
(6) each section of non-return flap interlocking action of drawing gas is correct, and close reliable rapidly, the shut-in time is qualified, and each hydrophobic valve switch is good;
(7) vacuum breaking door switch is handy, reliable in action;
(8) grease pump, jacking(oil) pump are in good stand-by state;
(9) EH oil system is working properly, reliable;
(10) boiler safety door, Pcv valve are through pass the test, reliable in action;
(11) oxygen-eliminating device and packing standby steam source and to switch facility reliable;
(12) steam turbine prevents water enter preventing measuring point accurate;
(13) high and low pressure bypath system is in good condition, and has enough capacity, and can ensure to drop at any time;
(14) main-generator breaker and degaussing switch are jumped and are closed normally;
(15) station-service DC power-supply system is in serviceable condition, and failure power system is infallible through certification test;
Diesel-driven generator is in serviceable condition, through the requirement of emergency start agreement with experimental;
(16) station service fast switching device is working properly;
(17) each bear vibration of unit is in acceptability limit;
(18) external electrical network normal operation, without outer net off-grid phenomenon; The control procedure of described each subsystem of FCB actuating signal occurrence time group, to comprise in this system comprise whole control procedures that following subsystem controls:
(1) boiler Pcv valve should when FCB actuating signal occurs, and main steam pressure higher than certain certain value and main steam flow is greater than certain certain value time chainly to open, chain closedown after main steam pressure drops to certain certain value, if when system has two and an above Pcv valve, can open during pressure height simultaneously, when pressure falls after rise, every two valves should close (the concrete time is depending on different system) by a few seconds in interval, are conducive to the stable operation of boiler water system like this;
(2) fuel master control is when FCB actuating signal occurs, fuel quantity reduces to about 50% of nominal fuel amount immediately, generally by stopping coal pulverizer realizing, as stopping several coal pulverizers, depending on different systems, principle is exactly that fuel quantity is kept to boiler minimum steady combustion load, when stopping coal pulverizer simultaneously, should about the seconds of interval 5 between two coal pulverizers, it is just passable that the coal pulverizer that residue is run can maintain minimum steady combustion load, like this can stable operation, need not oil reservoir be started again combustion-supporting;
(3) FCB actuating signal triggers RB actuating signal after occurring immediately, during this period, the coal-supplying amount of the coal pulverizer that residue is run remains unchanged, actuating signal transfers normal regulating to after disappearing again, run simultaneously in the quick shutdown protection of coal pulverizer " feeder confirm to run after the primary air flow of coal pulverizer be less than certain certain value; shut down after time delay certain hour " this, delay time should be appropriate prolongation, depending on concrete system, about about 10 seconds, the stable operation of pulverized coal preparation system can be ensured like this;
(4) after FCB actuating signal occurs, in order to the safety of system, MFT actuating signal can be triggered when meeting some requirements, after any one below in three kinds of conditions meets, all will trigger MFT signal, when a:FCB does not drop into, if during steam turbine tripping operation, unit load is greater than the operating mode of certain certain value; When b:FCB actuating signal occurs, the operating mode of high side valve quick closedown; After 5 seconds occurred c:FCB actuating signal, if when main steam pressure is higher than certain certain value, high side valve aperture is still less than the operating mode of certain certain value;
(5) bypath system: high pressure turbine by controls main vapour pressure, low voltage bypass controls reheater pressure, after FCB actuating signal occurs, the pressure set points of high pressure turbine by control loop slowly declines, final setting value maintains within the scope of 62% rated pressure to 67% rated pressure, and the moment that FCB actuating signal occurs, a few seconds (the concrete time is depending on different system) opened automatically soon by high pressure turbine by control valve and heavy pressure by-pass cooling water control valve, then automatically drop into automatically, high pressure turbine by governor valve control main steam pressure, Desuperheating water regulating valve controls main steam temperature, in the moment of FCB action, in order to ensure unit safety, if high other desuperheating water isolating door is still in closed condition or high other Desuperheating water regulating valve aperture when being less than 5%, the protection after time delay a few second of high other control valve is closed, low voltage bypass regulating loop is after FCB actuating signal occurs, about pressure set points finally maintains 50% rated pressure, and the moment that FCB actuating signal occurs, a few seconds (the concrete time is depending on different system) opened automatically soon by low voltage bypass control valve and low-pressure by pass temperature-lowering water control valve, then low voltage bypass control valve opening is down to 60%, then start to regulate reheater pressure, low-pressure by pass temperature-lowering water governor valve control temperature, in FCB action moment, in order to ensure unit safety, if low other desuperheating water isolating door is still in closed condition or low other Desuperheating water regulating valve aperture when being less than 5%, low voltage bypass control valve cuts out in protection after a few time delay in second,
(6) Attemperation water system: when FCB actuating signal occurs, one-level desuperheating water, secondary desuperheating water and reheater Desuperheating water regulating valve close certain hour automatically, regulate Stream temperature degree at different levels afterwards according to setting curve;
(7), when FCB actuating signal occurs, boiler master is cut to Non-follow control, and unit exits coordinated control mode; Turbine main control positive closing speed regulation valve of steam turbine certain hour simultaneously, the concrete time, depending on different system, can reduce load so fast, is conducive to the stable of unit main steam pressure, also can shortens the time of origin of RB actuating signal;
(8) when FCB actuating signal occurs, the overflow control valve of gland seal system should cut out, and auxiliary vapour is to shaft seal control valve and coldly should be in auto state to shaft seal control valve again, can ensure the stable of gland seal system like this;
(9), when FCB actuating signal occurs, heat keeps original position certain hour to auxiliary vapour adjustment doors again, depending on concrete system, and the then auxiliary vapour main-piping pressure of normal regulating; Auxiliary vapour should drop into automatic running status during this period to oxygen-eliminating device adjustment doors, regulates oxygen-eliminating device pressure;
(10) after FCB actuating signal occurs, water supply system there will be very great fluctuation process, if drum boiler, steam water-level has very great fluctuation process, if Once-through Boiler, feedwater flow there will be very great fluctuation process, and this just requires that feedwater control needs to keep three blunt quantity control, can better ensure the stable of water system like this; Must ensure during this that water supply system is in the automatic method of operation, no matter be electric pump or heat pump, rotating speed deviation is cut greatly manual value and should suitably be relaxed, delay time also should suitably relax, what the definite value of steam water-level chaser or feedwater flow chaser during this period should be suitable simultaneously relaxes a bit, false information is taken into account, because steam water-level or feedwater flow all can occur temporary transient false information;
(11) when FCB actuating signal occurs, condenser water level adjusting door standard-sized sheet, different depending on concrete system wide-open time, about about 10 seconds, transfer normal regulating condenser water level afterwards to, during this, the condenser water yield has very large consumption, is so more conducive to ensureing the stable of condensate system;
(12) disconnect for a certain reason if there is external electrical network, and main-generator breaker does not have the phenomenon of tripping, at this moment in order to ensure the safety of whole unit, must trigger FCB actuating signal, if FCB does not drop into, just triggers MFT actuating signal;
domestic unit all can have special device to judge that whether external electrical network is normal, then give generator feedback signals, and external unit generally all do not have this device, so once there is outer net off-grid phenomenon, generator can not receive trip command, actual load has been zero, and coordinated control system can think that current loads is lower than setting value, and can continue increases fuel quantity, pressure and temps etc. all can increase rapidly, abnormally dangerous, and steam turbine also there will be hypervelocity phenomenon, so must increase this protection;
(13) other system keeps the original method of operation constant, and all devices all drops into the automatic method of operation;
How described FCB actuating signal ensures unit safety, stablizes, returns to fast and net state after occurring, comprise:: the state of system or the function that has before FCB actuating signal occurs, the state of each system during generation, until return to and the state of all subsystems after net state during this; Also comprise after following FCB actuating signal completes, the control of each subsystem during the grid-connected load of fast quick-recovery:
(1) if water supply system is steam feed pump, after FCB action completes, the vapour source of steam feed pump will automatically switch to cold steam supply again, should note observing heat pump fluctuation of speed situation, notes abnormalities and takes measures in time;
(2) note observing Pcv valve state, vapour pressure Gao Shiru does not open, and answers manual unlocking;
(3) if hot-air damper is not closed after coal pulverizer tripping operation, should emergency cut-off on the spot, prevent Boiler combustion;
(4) if bypath system strenuous vibration, should manual-lock height collateral line unite immediately;
(5) during action once boiler extinguishment, answer strict implement furnace purge program, can again light a fire;
(6) once boiler extinguishment, the anticipation of boiler super high pressure accident is carried out.
2. the integrated control method of the shutdown not blowing out function of power plant FCB according to claim 1, it is characterized in that, comprise operating mode: steam turbine trips for a certain reason, cascading trip generator, thus make unit trip, at this moment boiler maintains minimum steady combustion load continuation stable operation, at any time can according to grid requirements again grid-connected on-load; Generator trips for a certain reason, cascading trip steam turbine, thus makes unit trip, and at this moment boiler maintains minimum steady combustion load continuation stable operation, at any time can according to grid requirements again grid-connected on-load.
3. the integrated control method of the shutdown not blowing out function of power plant FCB according to claim 1; it is characterized in that; comprise special operation condition: the device whether outer net normally works does not detect in power plant; namely there is off-grid phenomenon for a certain reason in outer net, when generator is without any feedback, once outer net breaks down; in order to the safety and stability of unit; this situation also triggers FCB actuating signal, if FCB does not drop into, just triggers MFT actuating signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410727011.XA CN104633638B (en) | 2014-09-01 | 2014-12-05 | The integrated control method of the shutdown not blowing out function of power plant FCB |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2014104358504 | 2014-09-01 | ||
| CN201410435850 | 2014-09-01 | ||
| CN201410727011.XA CN104633638B (en) | 2014-09-01 | 2014-12-05 | The integrated control method of the shutdown not blowing out function of power plant FCB |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104633638A true CN104633638A (en) | 2015-05-20 |
| CN104633638B CN104633638B (en) | 2017-03-01 |
Family
ID=53212688
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410727011.XA Active CN104633638B (en) | 2014-09-01 | 2014-12-05 | The integrated control method of the shutdown not blowing out function of power plant FCB |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104633638B (en) |
Cited By (28)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104976618A (en) * | 2015-06-30 | 2015-10-14 | 内蒙古电力勘测设计院有限责任公司 | Method used for avoiding shutdown of circulating fluidized bed boilers, logical control module, and control system |
| CN105041397A (en) * | 2015-07-16 | 2015-11-11 | 中国神华能源股份有限公司 | Interlock protection device and method of turbine united tripping boiler of CFB boiler generator set |
| CN105896527A (en) * | 2016-04-19 | 2016-08-24 | 国网江苏省电力公司电力科学研究院 | Thermal power generating unit FCB function evaluation method |
| CN106505566A (en) * | 2016-12-20 | 2017-03-15 | 广东电网有限责任公司电力调度控制中心 | Control method and system that after avoiding partial electric grid off-the-line, occurrence of large-area has a power failure |
| CN106545841A (en) * | 2016-12-07 | 2017-03-29 | 广东电网有限责任公司电力科学研究院 | The water supply control method that a kind of suppression FCB processes main vapour pressure rises |
| CN106707984A (en) * | 2016-11-23 | 2017-05-24 | 国网辽宁省电力有限公司电力科学研究院 | Method of using DCS to determine power transmission line fault and converting generator set into island model |
| CN107134797A (en) * | 2017-07-12 | 2017-09-05 | 贵州电网有限责任公司电力科学研究院 | A kind of method for preventing unit trip removal of load OPC function repetitive operations |
| CN107147091A (en) * | 2017-06-12 | 2017-09-08 | 中国神华能源股份有限公司 | Method, apparatus and system for triggering fast cut back |
| CN108104881A (en) * | 2017-12-01 | 2018-06-01 | 中国神华能源股份有限公司 | High pressure turbine by control method, system and machine readable storage medium |
| CN108317500A (en) * | 2017-12-21 | 2018-07-24 | 武汉都市环保工程技术股份有限公司 | Shut down the system and method for not blowing out in low-heat value gas power plant |
| CN108691579A (en) * | 2017-04-10 | 2018-10-23 | 新疆知信科技有限公司 | Without the startup method for starting steam after a kind of tripping of thermal power plant's generating set |
| CN108757060A (en) * | 2018-04-27 | 2018-11-06 | 中国神华能源股份有限公司 | Generating set bypath system control device and method |
| CN108964123A (en) * | 2018-07-17 | 2018-12-07 | 中山嘉明电力有限公司 | A kind of FCB operation method applied to fuel gas-steam unit power plant |
| CN109185916A (en) * | 2018-08-28 | 2019-01-11 | 苏州新吉利奥自动化控制有限公司 | A kind of burner hearth extinguishing detecting device and its detection method |
| CN109871587A (en) * | 2019-01-21 | 2019-06-11 | 南京铭越创信电气有限公司 | A kind of method of the controlled off-the-line of electric system under extreme weather conditions |
| CN109931581A (en) * | 2017-12-19 | 2019-06-25 | 赫普科技发展（北京）有限公司 | A kind of system that boiler oxygen-enriched combusting combines auxiliary peak-frequency regulation equipment |
| CN109974028A (en) * | 2019-03-19 | 2019-07-05 | 中国能源建设集团华北电力试验研究院有限公司 | A kind of 660MW supercritical coal-fired units shut down the optimization method of not blowing out |
| CN111123770A (en) * | 2019-12-13 | 2020-05-08 | 山东中实易通集团有限公司 | Method and device for determining opening of bypass model under FCB working condition |
| CN111255536A (en) * | 2020-01-22 | 2020-06-09 | 中国能源建设集团广东省电力设计研究院有限公司 | FCB operation method of gas-steam unit power plant |
| CN111412025A (en) * | 2020-03-26 | 2020-07-14 | 华润电力技术研究院有限公司 | Method and system for monitoring state of high-side system of steam turbine |
| CN112082137A (en) * | 2020-08-18 | 2020-12-15 | 国家能源集团山东石横热电有限公司 | Automatic steam temperature adjusting system of coal-fired boiler |
| CN112114518A (en) * | 2020-08-26 | 2020-12-22 | 中国能源建设集团华东电力试验研究院有限公司 | Boiler following and rapid load reduction optimization method in isolated network operation state |
| CN112865175A (en) * | 2021-01-08 | 2021-05-28 | 西安热工研究院有限公司 | FCB operation method of garbage power plant |
| CN113036816A (en) * | 2021-03-15 | 2021-06-25 | 华能南通燃机发电有限公司 | Steam turbine control method and system suitable for three-phase reclosing |
| CN113483316A (en) * | 2021-07-12 | 2021-10-08 | 西安热工研究院有限公司 | Boiler start-stop adjusting system and method for main pipe unit |
| CN113605998A (en) * | 2021-07-23 | 2021-11-05 | 中国能源建设集团华中电力试验研究院有限公司 | Method and system for processing operation fault of power generating unit of thermal power plant |
| CN114002983A (en) * | 2021-10-28 | 2022-02-01 | 西安热工研究院有限公司 | Electrical control device for triggering FCB |
| CN114941552A (en) * | 2022-05-13 | 2022-08-26 | 华电电力科学研究院有限公司 | Shutdown non-shutdown heat supply rapid switching control method based on large supercritical reheating type double-extraction back pressure unit |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001241651A (en) * | 2000-03-01 | 2001-09-07 | Hitachi Ltd | Fuel flow rate controller |
| CN101650021A (en) * | 2009-08-25 | 2010-02-17 | 广州粤能电力科技开发有限公司 | Primary air fan tripping set run back control method and system |
| CN101825005A (en) * | 2010-04-26 | 2010-09-08 | 浙江国华浙能发电有限公司 | Method for controlling the operation of high-voltage bypass in thermal generator set |
| CN102620277A (en) * | 2012-04-19 | 2012-08-01 | 广东电网公司电力科学研究院 | Method and system for controlling load-shedding working condition of supercritical unit |
| CN103382860A (en) * | 2013-05-24 | 2013-11-06 | 华电国际电力股份有限公司山东分公司 | Control method for steam turbine power generation and heat supply system |
-
2014
- 2014-12-05 CN CN201410727011.XA patent/CN104633638B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001241651A (en) * | 2000-03-01 | 2001-09-07 | Hitachi Ltd | Fuel flow rate controller |
| CN101650021A (en) * | 2009-08-25 | 2010-02-17 | 广州粤能电力科技开发有限公司 | Primary air fan tripping set run back control method and system |
| CN101825005A (en) * | 2010-04-26 | 2010-09-08 | 浙江国华浙能发电有限公司 | Method for controlling the operation of high-voltage bypass in thermal generator set |
| CN102620277A (en) * | 2012-04-19 | 2012-08-01 | 广东电网公司电力科学研究院 | Method and system for controlling load-shedding working condition of supercritical unit |
| CN103382860A (en) * | 2013-05-24 | 2013-11-06 | 华电国际电力股份有限公司山东分公司 | Control method for steam turbine power generation and heat supply system |
Cited By (40)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104976618A (en) * | 2015-06-30 | 2015-10-14 | 内蒙古电力勘测设计院有限责任公司 | Method used for avoiding shutdown of circulating fluidized bed boilers, logical control module, and control system |
| CN105041397A (en) * | 2015-07-16 | 2015-11-11 | 中国神华能源股份有限公司 | Interlock protection device and method of turbine united tripping boiler of CFB boiler generator set |
| CN105896527A (en) * | 2016-04-19 | 2016-08-24 | 国网江苏省电力公司电力科学研究院 | Thermal power generating unit FCB function evaluation method |
| CN106707984B (en) * | 2016-11-23 | 2019-03-29 | 国网辽宁省电力有限公司电力科学研究院 | DCS judges the method that transmission line malfunction makes generating set be transferred to island mode |
| CN106707984A (en) * | 2016-11-23 | 2017-05-24 | 国网辽宁省电力有限公司电力科学研究院 | Method of using DCS to determine power transmission line fault and converting generator set into island model |
| CN106545841B (en) * | 2016-12-07 | 2018-12-21 | 广东电网有限责任公司电力科学研究院 | A kind of water supply control method for inhibiting FCB process main vapour pressure to rise |
| CN106545841A (en) * | 2016-12-07 | 2017-03-29 | 广东电网有限责任公司电力科学研究院 | The water supply control method that a kind of suppression FCB processes main vapour pressure rises |
| CN106505566A (en) * | 2016-12-20 | 2017-03-15 | 广东电网有限责任公司电力调度控制中心 | Control method and system that after avoiding partial electric grid off-the-line, occurrence of large-area has a power failure |
| CN106505566B (en) * | 2016-12-20 | 2019-05-10 | 广东电网有限责任公司电力调度控制中心 | Avoid the control method and system that occurrence of large-area has a power failure after partial electric grid off-the-line |
| CN108691579B (en) * | 2017-04-10 | 2020-12-18 | 新疆知信科技有限公司 | Starting method of steam without starting after tripping of generator set of thermal power plant |
| CN108691579A (en) * | 2017-04-10 | 2018-10-23 | 新疆知信科技有限公司 | Without the startup method for starting steam after a kind of tripping of thermal power plant's generating set |
| CN107147091A (en) * | 2017-06-12 | 2017-09-08 | 中国神华能源股份有限公司 | Method, apparatus and system for triggering fast cut back |
| CN107134797A (en) * | 2017-07-12 | 2017-09-05 | 贵州电网有限责任公司电力科学研究院 | A kind of method for preventing unit trip removal of load OPC function repetitive operations |
| CN108104881A (en) * | 2017-12-01 | 2018-06-01 | 中国神华能源股份有限公司 | High pressure turbine by control method, system and machine readable storage medium |
| CN109931581A (en) * | 2017-12-19 | 2019-06-25 | 赫普科技发展（北京）有限公司 | A kind of system that boiler oxygen-enriched combusting combines auxiliary peak-frequency regulation equipment |
| CN109931581B (en) * | 2017-12-19 | 2024-04-19 | 赫普能源环境科技股份有限公司 | System combining oxygen-enriched combustion with auxiliary peak regulation and frequency modulation equipment of boiler |
| CN108317500A (en) * | 2017-12-21 | 2018-07-24 | 武汉都市环保工程技术股份有限公司 | Shut down the system and method for not blowing out in low-heat value gas power plant |
| CN108757060B (en) * | 2018-04-27 | 2020-11-03 | 中国神华能源股份有限公司 | Generator set bypass system control device and method |
| CN108757060A (en) * | 2018-04-27 | 2018-11-06 | 中国神华能源股份有限公司 | Generating set bypath system control device and method |
| CN108964123A (en) * | 2018-07-17 | 2018-12-07 | 中山嘉明电力有限公司 | A kind of FCB operation method applied to fuel gas-steam unit power plant |
| CN109185916A (en) * | 2018-08-28 | 2019-01-11 | 苏州新吉利奥自动化控制有限公司 | A kind of burner hearth extinguishing detecting device and its detection method |
| CN109871587A (en) * | 2019-01-21 | 2019-06-11 | 南京铭越创信电气有限公司 | A kind of method of the controlled off-the-line of electric system under extreme weather conditions |
| CN109974028A (en) * | 2019-03-19 | 2019-07-05 | 中国能源建设集团华北电力试验研究院有限公司 | A kind of 660MW supercritical coal-fired units shut down the optimization method of not blowing out |
| CN111123770A (en) * | 2019-12-13 | 2020-05-08 | 山东中实易通集团有限公司 | Method and device for determining opening of bypass model under FCB working condition |
| CN111255536A (en) * | 2020-01-22 | 2020-06-09 | 中国能源建设集团广东省电力设计研究院有限公司 | FCB operation method of gas-steam unit power plant |
| CN111412025B (en) * | 2020-03-26 | 2022-08-02 | 华润电力技术研究院有限公司 | Method and system for monitoring state of high-side system of steam turbine |
| CN111412025A (en) * | 2020-03-26 | 2020-07-14 | 华润电力技术研究院有限公司 | Method and system for monitoring state of high-side system of steam turbine |
| CN112082137A (en) * | 2020-08-18 | 2020-12-15 | 国家能源集团山东石横热电有限公司 | Automatic steam temperature adjusting system of coal-fired boiler |
| CN112082137B (en) * | 2020-08-18 | 2022-08-26 | 国家能源集团山东石横热电有限公司 | Automatic steam temperature adjusting system of coal-fired boiler |
| CN112114518A (en) * | 2020-08-26 | 2020-12-22 | 中国能源建设集团华东电力试验研究院有限公司 | Boiler following and rapid load reduction optimization method in isolated network operation state |
| CN112114518B (en) * | 2020-08-26 | 2022-04-22 | 中国能源建设集团华东电力试验研究院有限公司 | Boiler following and rapid load reduction optimization method in isolated network operation state |
| CN112865175A (en) * | 2021-01-08 | 2021-05-28 | 西安热工研究院有限公司 | FCB operation method of garbage power plant |
| CN112865175B (en) * | 2021-01-08 | 2023-05-30 | 西安热工研究院有限公司 | FCB operation method of garbage power plant |
| CN113036816A (en) * | 2021-03-15 | 2021-06-25 | 华能南通燃机发电有限公司 | Steam turbine control method and system suitable for three-phase reclosing |
| CN113483316A (en) * | 2021-07-12 | 2021-10-08 | 西安热工研究院有限公司 | Boiler start-stop adjusting system and method for main pipe unit |
| CN113605998A (en) * | 2021-07-23 | 2021-11-05 | 中国能源建设集团华中电力试验研究院有限公司 | Method and system for processing operation fault of power generating unit of thermal power plant |
| CN113605998B (en) * | 2021-07-23 | 2023-08-22 | 中国能源建设集团华中电力试验研究院有限公司 | Thermal power plant generator set operation fault processing method and system |
| CN114002983A (en) * | 2021-10-28 | 2022-02-01 | 西安热工研究院有限公司 | Electrical control device for triggering FCB |
| CN114941552A (en) * | 2022-05-13 | 2022-08-26 | 华电电力科学研究院有限公司 | Shutdown non-shutdown heat supply rapid switching control method based on large supercritical reheating type double-extraction back pressure unit |
| CN114941552B (en) * | 2022-05-13 | 2023-05-23 | 华电电力科学研究院有限公司 | Large supercritical reheating type double-pumping back pressure unit-based rapid switching control method for heat supply without stopping furnace when shutdown |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104633638B (en) | 2017-03-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104633638B (en) | The integrated control method of the shutdown not blowing out function of power plant FCB | |
| CN103382860B (en) | Steam turbine power generation heating system controlling method | |
| CN108561196B (en) | Safety protection system and method for cutting off operation of low-pressure cylinder of thermal power generating unit | |
| CN111255536B (en) | FCB operation method of gas-steam unit power plant | |
| CN103791485A (en) | Optimal control method of water supply system of thermal power generating unit | |
| CN102071978A (en) | Method for over-speed protection of turbine under load shedding working condition | |
| CN102620277A (en) | Method and system for controlling load-shedding working condition of supercritical unit | |
| CN112431642A (en) | Steam turbine system based on FCB control logic | |
| CN108757068A (en) | Combination circulation steam turbine group cuts supply control method for heat and device entirely | |
| CN109974028A (en) | A kind of 660MW supercritical coal-fired units shut down the optimization method of not blowing out | |
| CN211524912U (en) | Safety device of steam turbine feed pump | |
| CN108317500A (en) | Shut down the system and method for not blowing out in low-heat value gas power plant | |
| CN104616709A (en) | Safety and stability control method based on asynchronous oscillation of nuclear power units | |
| WO2023088279A1 (en) | System and method for improving rb working condition of induced draft fan of two-boiler one-machine thermal power generating unit | |
| CN101170256B (en) | Quick switch-back protection method for local power grid power generation unit | |
| CN216346384U (en) | System for improving RB working condition of draught fan of two-furnace one-thermal power generating unit | |
| CN112865175B (en) | FCB operation method of garbage power plant | |
| CN104637558A (en) | Safe and stable control method for asynchronous oscillation of nuclear power unit | |
| KR101631417B1 (en) | Display method for Total Monitoring Of Turbine for the Power Plant | |
| CN104696941B (en) | The startup restoration methods of generating set during a kind of booster fan on-mechanical exception | |
| CN110296386B (en) | Fuel control method under FCB working condition of coal-fired unit for mixed combustion of coal gas | |
| US4151712A (en) | Protective shutdown system for combined cycle plant having a dual liquid fuel system | |
| CN113605998B (en) | Thermal power plant generator set operation fault processing method and system | |
| Zalostiba | Power system blackout prevention by dangerous overload elimination and fast self-restoration | |
| Engineering | A description of discrete supplementary controls for stability |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |