CN102588939A - Main boiler control system for large thermal power generating unit - Google Patents
Main boiler control system for large thermal power generating unit Download PDFInfo
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- CN102588939A CN102588939A CN2012100567179A CN201210056717A CN102588939A CN 102588939 A CN102588939 A CN 102588939A CN 2012100567179 A CN2012100567179 A CN 2012100567179A CN 201210056717 A CN201210056717 A CN 201210056717A CN 102588939 A CN102588939 A CN 102588939A
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Abstract
The invention discloses a main boiler control system for a large thermal power generating unit, which belongs to automatic circuit control systems for power station boilers, and achieves rapid load response and stable control of a main boiler control system for a large thermal power generating unit. The main boiler control system comprises a PID (proportion integration differentiation) module, the boiler, a steam turbine, a generator, an A/D (analog-to-digital) converter, steam turbine speed regulating pressure, drum pressure, main steam pressure and a generator power sensor; and a function module, a simulation manipulator, a division module, a multiplication module, an addition module, a constant value module, a switching module, a regulating module, an 'AND' gate module and a 'NOT' gate module in a distributed control system are used for constructing a real-time online optimizing circuit, so that the independent main boiler control system is formed. Thermal efficiency indexes and technical parameter indexes of the unit can be improved, and energy conservation and emission reduction are achieved. The main boiler control system is suitable for the large unit of a peak shaving and direct blowing double-inlet and double-outlet coal mill coal pulverizing system.
Description
Technical field
The present invention relates to a kind of automatic control system, particularly a kind of PID automatic control system of large-sized station boiler.
Background technology
Along with fast development of national economy; High parameter, big capacity unit shared ratio in electrical network is more and more big, because power structure changes the peak of electrical network daily load curve and the increase of the difference of low ebb; Some regional peak-valley difference reaches more than 50%, and also has the trend that continues increase.Therefore, require monoblock all to have the ability of participating in peak load regulation network, frequency modulation at present, thereby boiler master system system just become the complete important part of automatic control task of coordinating of completion large electric power plant unit.Increase along with the large-scale thermal power machine pool-size; The variation of boiler load, confluent, main steam temperature, burning and main vapour pressure etc. and the influence of other disturbing factor; The operations staff adopts manual adjustments to be difficult to satisfy the production demand; Even do not reach the requirement of controlling index, thereby directly influence the safety and the economical operation of unit.
Summary of the invention
The boiler master system system of a kind of large electric power plant unit provided by the invention has solved prior art can not be to the technical problem of large-scale unit boiler master system system's quick load response and stable control.
The present invention overcomes the above problems through following scheme:
A kind of boiler master system system of large electric power plant unit; Comprise PID module adjuster, boiler, steam turbine, generator, A/D converter, simulating manipulator, main vapour pressure sensor and generator power sensor; Total fuel quantity instruction of said boiler place unit is connected with the tracking input of simulating manipulator; The boiler load instruction of said boiler place unit is connected with the tracking input of a PID module adjuster and the tracking input of the 2nd PID module adjuster respectively; The boiler master of said boiler place unit is cut manual command and is connected with the MI input of simulating manipulator; All fuel control manual command of said boiler place unit are connected with the TS input of simulating manipulator; The output of the steam turbine speed control stage pressure sensor of said unit links to each other with the input of described first A/D converter; The output of the main vapour pressure sensor of said unit links to each other with the input of described second A/D converter; The output of the drum pressure sensor of said unit links to each other with the input of described the 3rd A/D converter; The output of the generator power sensor of said unit links to each other with the input of described the 4th A/D converter; The output of described first A/D converter links to each other with an input of division module; The output of described second A/D converter links to each other with another input of division module; The output of described division module links to each other with an input of first multiplier module; The output of described first multiplier module links to each other with an input of first addition module; The output of described first multiplier module links to each other with the input of first function module; The output of described first multiplier module links to each other with an input of the 3rd addition module; The output of described first multiplier module links to each other with an input of second multiplier module; The output of described first function module links to each other with another input of the 3rd addition module; The output of described second multiplier module links to each other with another input of first addition module; The output of described the 3rd addition module links to each other with another input of second multiplier module; The output of described first addition module links to each other with an input of second addition module; The output of described second addition module links to each other with the SP input of a PID module adjuster; The output O1 of described first A/D converter links to each other with another input U21 of the 6th addition module B6; The output of main vapour pressure setting value P0 links to each other with another input of first multiplier module; Described main vapour pressure setting value links to each other with an input of the 4th addition module; The main vapour pressure setting value links to each other with the input of second function module; The output of described second function module links to each other with another input of the 4th addition module; The output of described the 4th addition module links to each other with another input of second addition module; The output of described the 3rd A/D converter links to each other with an input of slender acanthopanax method module; The output of described slender acanthopanax method module links to each other with an input of the 6th addition module; The output of described the 6th addition module links to each other with the PV input of simulating manipulator; The output of the 6th addition module links to each other with the PV input of a PID module adjuster; The output of described the 3rd A/D converter links to each other with the input of the 3rd function module; The output of described the 3rd function module links to each other with another input of slender acanthopanax method module; The output of described the 4th A/D converter links to each other with the PV input of the 2nd PID module adjuster; Main vapour pressure setting value P0 links to each other with an input of the 7th addition module; Main vapour pressure setting value P0 links to each other with the SP input of the 2nd PID module adjuster; Main vapour pressure setting value P0 links to each other with the input of the 4th function module; The output of described the 4th function module links to each other with another input of the 7th addition module; The output of described the 7th addition module links to each other with second input of second handover module; The output of definite value module links to each other with the first input end of second handover module; Described CCS2 mode instructs V6 to link to each other with the 3rd input of second handover module; The output of described second handover module links to each other with the FF input of the 2nd PID module adjuster; The output X19 of described the 2nd PID module adjuster links to each other with second input of first handover module; The output of described first handover module links to each other with the A input of simulating manipulator; The output of a described PID module adjuster links to each other with the first input end of first handover module; Described CCS2 mode instructs V6 to link to each other with the 3rd input of first handover module; Described CCS2 mode instructs V6 to link to each other with an input of door module with second; The output of described boiler master automatic command V5 links to each other with an input of door module with first; Described boiler master automatic command links to each other with another input of door module with second; Described CCS2 mode instructs the input of V6 NAND gate module to link to each other; The output of described not gate module links to each other with another input of door module with first; Described first links to each other with the TF input of a PID module adjuster with the output of door module; The output of described second addition module links to each other with the SP input of analog regulator; Described second links to each other with the TF input of the 2nd PID module adjuster with the output of door module; The O output of described analog regulator links to each other with the boiler load instruction, and the A output of described analog regulator links to each other with the boiler master automatic command.
Described boiler is the large-scale pulverized coal firing boiler of direct-firing double inlet and outlet coal mill.
The invention solves to large-scale unit coordinated control system dynamically with combining and the technical problem of stable control, can improve the thermal efficiency indices and the performance indications of unit and reach the purpose of energy-saving and emission-reduction.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Dotted line among the figure is a switching value, and solid line is an analog quantity.
Specific embodiment
A kind of boiler master system system of large electric power plant unit; Comprise PID module adjuster, boiler, steam turbine, generator, A/D converter, simulating manipulator CZ, main vapour pressure sensor and generator power sensor; Total fuel quantity instruction V1 of said boiler place unit is connected with the tracking input TR of simulating manipulator CZ; The boiler load instruction V2 of said boiler place unit is connected with the tracking input TR of a PID module adjuster PID-1 and the tracking input TR of the 2nd PID module adjuster PID-2 respectively; The boiler master of said boiler place unit is cut manual command V3 and is connected with the MI input of simulating manipulator CZ; All fuel control manual command V4 of said boiler place unit are connected with the TS input of simulating manipulator CZ; The output P1 of the steam turbine speed control stage pressure sensor of said unit links to each other with the input of the described first A/D converter M1; The output PT of the main vapour pressure sensor of said unit links to each other with the input of the described second A/D converter M2; The output Pb of the drum pressure sensor of said unit links to each other with the input of described the 3rd A/D converter M3; The output PE of the generator power sensor of said unit links to each other with the input of described the 4th A/D converter M4; The output O1 of the described first A/D converter M1 links to each other with the input U1 of division module E; The output O2 of the described second A/D converter M2 links to each other with another input U2 of division module E; The output X1 of described division module E links to each other with the input U3 of the first multiplier module A1; The output X2 of the described first multiplier module A1 links to each other with the input U10 of the first addition module B1; The output X2 of the described first multiplier module A1 links to each other with the input U5 of the first function module D1; The output X2 of the described first multiplier module A1 links to each other with the input U6 of the 3rd addition module B3; The output X2 of the described first multiplier module A1 links to each other with the input U8 of the second multiplier module A2; The output X9 of the described first function module D1 links to each other with another input U7 of the 3rd addition module B3; The output X11 of the described second multiplier module A2 links to each other with another input U11 of the first addition module B1; The output X10 of described the 3rd addition module B3 links to each other with another input U9 of the second multiplier module A2; The output X3 of the described first addition module B1 links to each other with the input U12 of the second addition module B2; The output X4 of the described second addition module B2 links to each other with the SP input of a PID module adjuster; The output O1 of the described first A/D converter M1 links to each other with another input U21 of the 6th addition module B6; The output of main vapour pressure setting value P0 links to each other with another input of the first multiplier module A1; Described main vapour pressure setting value P0 links to each other with the input U15 of the 4th addition module B4; Main vapour pressure setting value P0 links to each other with the input U14 of the second function module D2; The output X6 of the described second function module D2 links to each other with another input U16 of the 4th addition module B4; The output X7 of described the 4th addition module B4 links to each other with another input U13 of the second addition module B2; The output O3 of described the 3rd A/D converter M3 links to each other with the input U18 of slender acanthopanax method module B5; The output X8 of described slender acanthopanax method module B5 links to each other with the input (U20) of the 6th addition module B6; The output X12 of described the 6th addition module B6 links to each other with the PV input of simulating manipulator CZ; The output X12 of the 6th addition module B6 links to each other with the PV input of a PID module adjuster PID-1; The output O3 of described the 3rd A/D converter M3 links to each other with the input U17 of the 3rd function module D3; The output X13 of described the 3rd function module D3 links to each other with another input U19 of slender acanthopanax method module B5; The output O4 of described the 4th A/D converter M4 links to each other with the PV input of the 2nd PID module adjuster PID-2; Main vapour pressure setting value P0 links to each other with the input U23 of the 7th addition module B7; Main vapour pressure setting value P0 links to each other with the SP input of the 2nd PID module adjuster PID-2; Main vapour pressure setting value P0 links to each other with the input U22 of the 4th function module D4; The output X14 of described the 4th function module D4 links to each other with another input U24 of the 7th addition module B7; The output X16 of described the 7th addition module B7 links to each other with the second input U32 of the second handover module T2; The output X24 of definite value module H links to each other with the first input end U31 of the second handover module T2; Described CCS2 mode instructs V6 to link to each other with the 3rd input U33 of the second handover module T2; The output X17 of the described second handover module T2 links to each other with the FF input of the 2nd PID module adjuster PID-2; The output X19 of described the 2nd PID module adjuster PID-2 links to each other with the second input U29 of the first handover module T1; The output X22 of the described first handover module T1 links to each other with the A input of simulating manipulator CZ; The output X5 of a described PID module adjuster PID-1 links to each other with the first input end U28 of the first handover module T1; Described CCS2 mode instructs V6 to link to each other with the 3rd input U30 of the first handover module T1; Described CCS2 mode instructs V6 to link to each other with the input U34 of door module F2 with second; The output of described boiler master automatic command V5 links to each other with the input U26 of door module F1 with first; Described boiler master automatic command V5 links to each other with another input U35 of door module F2 with second; Described CCS2 mode instructs the input U25 of V6 NAND gate module N to link to each other; The output X15 of described not gate module N links to each other with another input U27 of door module F1 with first; Described first links to each other with the TF input of a PID module adjuster PID-1 with the output X20 of door module F1; The output X4 of the described second addition module B2 links to each other with the SP input of analog regulator CZ; Described second links to each other with the TF input of the 2nd PID module adjuster PID-2 with the output X18 of door module F2; The O output of described analog regulator CZ links to each other with boiler load instruction X21, and the A output of described analog regulator CZ links to each other with boiler master automatic command X23.
A kind of boiler master system system of large electric power plant unit; Comprise PID module, boiler, steam turbine, generator, A/D converter, steam turbine speed control stage pressure, drum pressure, main vapour pressure and generator power sensor; Adopt function module, simulating manipulator, division module, multiplier module, addition module, definite value module, handover module, adjustment module, AND gate module, inverter module in the scattered control system to be built into real-time online optimization circuit, constitute independently a quick load response and a stable automatic control system of controlling.
A kind of boiler master system system of large electric power plant unit, the control step is following: at first obtain the X1 value with steam turbine speed control stage pressure P1 divided by main vapour pressure PT.Obtain energy balance value X2 value with main vapour pressure setting value P0 with X1 is on duty.The output X11 value that energy balance value X2 value is added multiplier module A2 obtains the X3 value.The X3 value is added that the output X7 value of addition module B4 obtains X4 value (function module D2 and addition module B4 constitute differentiation element).Heat signal value X12 sends into the measurement input PV of adjustment module PID-1; The output valve X4 of addition module sends into the given input SP of adjustment module PID-1; Boiler load instruction V2 sends into the tracking input TR of adjustment module PID-1, and the output X20 of AND gate module F1 sends into the switching input TF of adjustment module PID-1.Energy balance value X2 value obtains the X9 value after changing through function module D1, and X9 adds energy balance value X2 value and obtains the X10 value, and the X10 value is added energy balance value X2 value and obtained the X11 value.Main vapour pressure setting value P0 obtains the X6 value after changing through function module D2, and the negative value of X6 value is added main vapour pressure setting value P0 and obtained the X7 value.Drum pressure Pb value is obtained the X13 value after function module D3 conversion; Drum pressure Pb value adds that the output negative value of function module D3 obtains X8 value (function module D3 and addition module B5 constitute differentiation element), and the X8 value is added steam turbine speed control stage pressure P1 value and obtained heat signal X12 value.Main vapour pressure setting value P0 obtains the X14 value after changing through function module D4; The negative value of X14 value is added main vapour pressure setting value P0 and is obtained X16 value (function module D4 and addition module B7 constitute differentiation element); The output X24 of X16 value and definite value module H is as two inputs of handover module T2, and the control mode of handover module T2 selects U32 to instruct (switching value) to control by the CCS2 mode.Generator power PE value is sent into the measurement input PV of adjustment module PID-2; Main vapour pressure setting value P0 sends into the given input SP of adjustment module PID-2; Boiler load instruction V2 sends into the tracking input TR of adjustment module PID-2; The output X18 of AND gate module F2 sends into the switching input TF of adjustment module PID-2, and the output X17 of handover module T2 sends into the feedforward input FF of adjustment module PID-2.The output X19 of adjustment module PID-2 sends into the input U29 of handover module T1, and the output X5 of adjustment module PID-1 sends into the input U28 of handover module T1, and the control mode of handover module T1 selects U30 to instruct (switching value) to control by the CCS2 mode.Boiler master automatic command V5 sends into the input U26 of AND gate module F1, and the CCS2 mode instructs (switching value) V6 after the output of inverter module, to send into the input U27 of AND gate module F1.All fuel control manual command V4 are sent into the input TS end of simulating manipulator CZ.Boiler master is cut the input MI end that manual command V3 sends into simulating manipulator CZ.Heat signal X12 is sent into the measurement input PV end of simulating manipulator CZ.The output X4 of addition module B2 is sent into the given input SP end of simulating manipulator CZ.The output of handover module T1 is sent into the input A end of simulating manipulator CZ.Total fuel value is sent into the tracking input TR end of simulating manipulator CZ.The output O of simulating manipulator CZ sends into next system as boiler load instruction.The output A of simulating manipulator CZ sends into next system as the boiler master automatic command.
Claims (2)
1. the boiler master system system of a large electric power plant unit; Comprise PID module adjuster, boiler, steam turbine, generator, A/D converter, simulating manipulator (CZ), main vapour pressure sensor and generator power sensor; It is characterized in that; Total fuel quantity instruction (V1) of said boiler place unit is connected with the tracking input (TR) of simulating manipulator (CZ); The boiler load instruction (V2) of said boiler place unit is connected with the tracking input (TR) of a PID module adjuster (PID-1) and the tracking input (TR) of the 2nd PID module adjuster (PID-2) respectively; The boiler master of said boiler place unit is cut manual command (V3) and is connected with the MI input of simulating manipulator (CZ); All fuel control manual command (V4) of said boiler place unit are connected with the TS input of simulating manipulator (CZ); The output (P1) of the steam turbine speed control stage pressure sensor of said unit links to each other with the input of described first A/D converter (M1); The output (PT) of the main vapour pressure sensor of said unit links to each other with the input of described second A/D converter (M2); The output (Pb) of the drum pressure sensor of said unit links to each other with the input of described the 3rd A/D converter (M3); The output (PE) of the generator power sensor of said unit links to each other with the input of described the 4th A/D converter (M4); The output (O1) of described first A/D converter (M1) links to each other with an input (U1) of division module (E); The output (O2) of described second A/D converter (M2) links to each other with another input (U2) of division module (E); The output (X1) of described division module (E) links to each other with an input (U3) of first multiplier module (A1); The output (X2) of described first multiplier module (A1) links to each other with an input (U10) of first addition module (B1); The output (X2) of described first multiplier module (A1) links to each other with the input (U5) of first function module (D1); The output (X2) of described first multiplier module (A1) links to each other with an input (U6) of the 3rd addition module (B3); The output (X2) of described first multiplier module (A1) links to each other with an input (U8) of second multiplier module (A2); The output (X9) of described first function module (D1) links to each other with another input (U7) of the 3rd addition module (B3); The output (X11) of described second multiplier module (A2) links to each other with another input (U11) of first addition module (B1); The output (X10) of described the 3rd addition module (B3) links to each other with another input (U9) of second multiplier module (A2); The output (X3) of described first addition module (B1) links to each other with an input (U12) of second addition module (B2); The output (X4) of described second addition module (B2) links to each other with the SP input of a PID module adjuster (PID-1); The output (O1) of described first A/D converter (M1) links to each other with another input (U21) of the 6th addition module (B6); The output of main vapour pressure setting value P0 links to each other with another input (U4) of first multiplier module (A1); Described main vapour pressure setting value (P0) links to each other with an input (U15) of the 4th addition module (B4); Main vapour pressure setting value (P0) links to each other with the input (U14) of second function module (D2); The output (X6) of described second function module (D2) links to each other with another input (U16) of the 4th addition module (B4); The output (X7) of described the 4th addition module (B4) links to each other with another input (U13) of second addition module (B2); The output (O3) of described the 3rd A/D converter (M3) links to each other with an input (U18) of slender acanthopanax method module (B5); The output (X8) of described slender acanthopanax method module (B5) links to each other with an input (U20) of the 6th addition module (B6); The output (X12) of described the 6th addition module (B6) links to each other with the PV input of simulating manipulator (CZ); The output (X12) of the 6th addition module (B6) links to each other with the PV input of a PID module adjuster (PID-1); The output (O3) of described the 3rd A/D converter (M3) links to each other with the input (U17) of the 3rd function module (D3); The output (X13) of described the 3rd function module (D3) links to each other with another input (U19) of slender acanthopanax method module (B5); The output (O4) of described the 4th A/D converter (M4) links to each other with the PV input of the 2nd PID module adjuster (PID-2); Main vapour pressure setting value P0 links to each other with an input (U23) of the 7th addition module (B7); Main vapour pressure setting value P0 links to each other with the SP input of the 2nd PID module adjuster (PID-2); Main vapour pressure setting value P0 links to each other with the input (U22) of the 4th function module (D4); The output (X14) of described the 4th function module (D4) links to each other with another input (U24) of the 7th addition module (B7); The output (X16) of described the 7th addition module (B7) links to each other with second input (U32) of second handover module (T2); The output (X24) of definite value module (H) links to each other with the first input end (U31) of second handover module (T2); Described CCS2 mode instructs V6 to link to each other with the 3rd input (U33) of second handover module (T2); The output (X17) of described second handover module (T2) links to each other with the FF input of the 2nd PID module adjuster (PID-2); The output (X19) of described the 2nd PID module adjuster (PID-2) links to each other with second input (U29) of first handover module (T1); The output (X22) of described first handover module (T1) links to each other with the A input of simulating manipulator (CZ); The output (X5) of a described PID module adjuster (PID-1) links to each other with the first input end (U28) of first handover module (T1); Described CCS2 mode instructs (V6) to link to each other with the 3rd input (U30) of first handover module (T1); Described CCS2 mode instructs (V6) to link to each other with an input (U34) of door module (F2) with second; The output of described boiler master automatic command (V5) links to each other with an input (U26) of door module (F1) with first; Described boiler master automatic command (V5) links to each other with another input (U35) of door module (F2) with second; Described CCS2 mode instructs the input (U25) of (V6) NAND gate module (N) to link to each other; The output (X15) of described not gate module (N) links to each other with another input (U27) of door module (F1) with first; Described first with the door module (F1) an output (X20) link to each other with the TF input of a PID module adjuster (PID-1); The output (X4) of described second addition module (B2) links to each other with the SP input of analog regulator (CZ); Described second with the door module (F2) an output (X18) link to each other with the TF input of the 2nd PID module adjuster (PID-2); The O output of described analog regulator (CZ) links to each other with boiler load instruction (X21), and the A output of described analog regulator (CZ) links to each other with boiler master automatic command (X23).
2. like the boiler master system system of right 1 described a kind of large electric power plant unit, it is characterized in that described boiler is the large-scale pulverized coal firing boiler of direct-firing double inlet and outlet coal mill.
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| CN103216811A (en) * | 2013-04-09 | 2013-07-24 | 国家电网公司 | Control system for furnace pressure of large-scale boiler |
| CN103225801A (en) * | 2013-04-06 | 2013-07-31 | 国家电网公司 | Intelligent multi-mode PID (proportional integral differential) water-feeding control system for large generator unit |
| CN103437838A (en) * | 2013-08-01 | 2013-12-11 | 国家电网公司 | Method for effectively improving quick response on external load change for generator set |
| CN112398177A (en) * | 2020-11-30 | 2021-02-23 | 国网新疆电力有限公司电力科学研究院 | Method for obtaining flexible coal feeding instruction of supercritical or ultra-supercritical thermal power generating unit |
| CN115327893A (en) * | 2022-10-12 | 2022-11-11 | 国网山西省电力公司电力科学研究院 | Thermal power generating unit coordinated control system for adjusting main steam pressure set value |
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