CN103267304A - Burning control system of large-sized thermal power generating unit - Google Patents
Burning control system of large-sized thermal power generating unit Download PDFInfo
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- CN103267304A CN103267304A CN2013101118063A CN201310111806A CN103267304A CN 103267304 A CN103267304 A CN 103267304A CN 2013101118063 A CN2013101118063 A CN 2013101118063A CN 201310111806 A CN201310111806 A CN 201310111806A CN 103267304 A CN103267304 A CN 103267304A
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Abstract
The invention discloses a burning control system of a large-sized thermal power generating unit, which solves the problems of the existing control method for manually adjusting the boiler burning system that the rapid load response and the stable control of the large-sized thermal power generating unit cannot be realized. The burning control system comprises a proportional integration differentiation (PID) module, an add-subtract module, a general election module, a small election module, a functional module, a differential module, a fuel main controller, an oil pressure adjusting system, a coal feeder, a boiler load instruction, a general air volume, a general fuel volume, a smoke oxygen content, a hearth pressure, a primary fan guide blade, an air blower guide blade and a draught fan guide blade, which are connected to form a real-time online optimizing circuit, and an independent automatic dynamic tracking and stable control system is formed. The technical problem for dynamically tracking and stably controlling the large-sized boiler burning system can be solved, the thermal economical index of a boiler can be increased, and an energy-saving and emission-reducing purpose can be realized.
Description
Technical field
The present invention relates to a kind of automatic control system of thermal power plant, particularly a kind of PID automatic control system of combustion control system of large-scale thermal power machine group.
Background technology
Fast development along with the modernization of industry, large electric power plant 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 electricity consumption peak-valley difference reaches more than 50%, and also has the trend that continues increase.Therefore, require the monoblock of large electric power plant unit all to have the ability that participates in peak load regulation network, frequency modulation, thereby boiler combustion control system just becomes finish the complete important part of automatic control task of coordinating of 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, existing operations staff adopts the control method of manual adjustments boiler combustion system to be difficult to satisfy the demand of electrical production quality, do not reach the requirement of quick load response and stable control, thereby directly influence safety and the economical operation of unit.
Summary of the invention
The invention provides a kind of combustion control system of large electric power plant unit, solved the control method that existing operations staff adopts the manual adjustments boiler combustion system and can not reach the technical problem of large-scale unit boiler combustion control system being carried out quick load response and stable control.
The present invention overcomes the above problems by following scheme:
A kind of combustion control system of large electric power plant unit, comprise fuel master controller, fuel pressure regulating system, feeder, plus-minus module, function module and proportional integral derivative adjustment module, the input C1 of little modeling piece is connected with the total blast volume signal V of boiler place unit, the boiler load command M of the input C2 of little modeling piece and boiler place unit
BConnect, the output 01 of little modeling piece is connected with the input C3 of the first plus-minus module, the input C18 of the first plus-minus module is connected with the total fuel quantity signal B of boiler, the output 02 of the first plus-minus module is connected with the input C4 of fuel master controller, the output 03 of fuel master controller is connected with the input C5 of feeder A, the output 030 of feeder A is connected with the input E1 of the 4th proportional integral derivative adjuster and the input D2 of the 5th proportional integral derivative adjuster respectively, the input D1 of the 4th proportional integral derivative adjuster is connected with boiler A mill primary air flow signal F1, be connected with boiler A on the input E2 of the 5th proportional integral derivative adjuster and grind force signal U1, the output 04 of the 4th proportional integral derivative adjuster is connected with the input C10 of second largest modeling piece, the output of the 5th proportional integral derivative adjuster (PID5) is connected with boiler A mill grinding pressure control end P1, the output 014 of second largest modeling piece is connected with the input C38 of second function module, the input C15 that output 015 and the slender acanthopanax of second function module subtracts module is connected, the output O16 that slender acanthopanax subtracts module is connected with the input C16 of proportion differential adjustment module, and the output O17 of proportion differential adjustment module is connected with primary air fan inlet guide vane control end A2 with primary air fan inlet guide vane control end A1 respectively; The input C20 of first function module is connected with the main steam flow signal D of unit, and the output 021 of first function module is connected with the input C21 of the second plus-minus module, is connected with the flue gas oxygen content O of boiler on the input C22 of the second plus-minus module
2The % signal, the output 022 of the second plus-minus module is connected with the input C25 of the first proportional integral derivative adjustment module, the output 019 of the first proportional integral derivative adjustment module is connected with the input C24 of the 3rd addition module, the input C23 of the 3rd addition module is connected with the output 018 of first modeling piece, the boiler load command M of the input C19 of first modeling piece and boiler place unit
BConnect, the input C17 of first modeling piece is connected with the total fuel quantity signal B of boiler, the output 028 of the 3rd addition module is connected with the input C36 of the second proportional integral derivative adjustment module, the input C37 of the second proportional integral derivative adjustment module is connected with the output 020 of the first addition module addition module, the input C26 of the first addition module addition module is connected with total primary air flow signal V1 of boiler, the input C27 of the first addition module addition module is connected with total secondary air flow signal V2 of boiler, the output 025 of the second proportional integral derivative adjustment module respectively with pressure fan inlet guide vane control end A3, pressure fan inlet guide vane control end A4 be connected, the input C33 of differential module connects, the output O23 of furnace pressure setting value module is connected with the input C28 of the 6th plus-minus module, the input C29 of the 6th plus-minus module is connected with the furnace pressure signal PS of boiler, the output 027 of the 6th plus-minus module is connected with the input C30 of the 3rd proportional integral derivative adjustment module, the output 024 of the 3rd proportional integral derivative adjustment module is connected with the input C31 of second addition module, the input C32 of second addition module is connected with the output 029 of differential module, the output 026 of second addition module is connected with the input C34 of the 3rd plus-minus module and the input C35 of the 4th plus-minus module respectively, be connected with enable override signal X1 on the subtrahend input of the 3rd plus-minus module, be connected with another enable override signal X2 on the subtrahend input of the 4th plus-minus module, be connected with the inlet guide vane control end A5 of air-introduced machine on the output of the 3rd plus-minus module, be connected with the inlet guide vane control end A6 of air-introduced machine on the output of the 4th plus-minus module.
The output 03 of fuel master controller is connected with the input C6 of feeder B, the output 031 of feeder B is connected with the input E3 of the 6th proportional integral derivative adjuster and the input D4 of the 7th proportional integral derivative adjuster respectively, the input D3 of the 6th proportional integral derivative adjuster is connected with boiler B mill primary air flow signal F2, be connected with boiler B on the input E4 of the 7th proportional integral derivative adjuster and grind force signal U2, the output 06 of the 6th proportional integral derivative adjuster is connected with the input C11 of second largest modeling piece, and the output of the 7th proportional integral derivative adjuster is connected with boiler B mill grinding pressure control end P2.
The invention solves to the large-sized boiler combustion control system dynamically with combining and the technical problem of stable control, can improve 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 structured flowchart of the present invention.
The specific embodiment
A kind of combustion control system of large electric power plant unit, comprise fuel master controller, fuel pressure regulating system, feeder, plus-minus module, function module and proportional integral derivative adjustment module, it is characterized in that, the input C1 of little modeling piece XX is connected with the total blast volume signal V of boiler place unit, the boiler load command M of the input C2 of little modeling piece XX and boiler place unit
BConnect, the output 01 of little modeling piece XX is connected with the input C3 of the first plus-minus module J 1, the input C18 of the first plus-minus module J 1 is connected with the total fuel quantity signal B of boiler, the output 02 of the first plus-minus module J 1 is connected with the input C4 of fuel master controller, the output 03 of fuel master controller is connected with the input C5 of feeder A, the output 030 of feeder A is connected with the input E1 of the 4th proportional integral derivative adjuster PID4 and the input D2 of the 5th proportional integral derivative adjuster PID5 respectively, the input D1 of the 4th proportional integral derivative adjuster PID4 is connected with boiler A mill primary air flow signal F1, be connected with boiler A on the input E2 of the 5th proportional integral derivative adjuster PID5 and grind force signal U1, the output 04 of the 4th proportional integral derivative adjuster PID4 is connected with the input C10 of second largest modeling piece DX2, the output of the 5th proportional integral derivative adjuster PID5 is connected with boiler A mill grinding pressure control end P1, the output 014 of second largest modeling piece DX2 and the second function module F2(X) input C38 be connected, the second function module F2(X) output 015 is connected with the input C15 that slender acanthopanax subtracts module J 7, the output O16 that slender acanthopanax subtracts module J 7 is connected with the input C16 of proportion differential adjustment module PI, and the output O17 of proportion differential adjustment module PI is connected with primary air fan inlet guide vane control end A2 with primary air fan inlet guide vane control end A1 respectively; The first function module F1(X) input C20 is connected with the main steam flow signal D of unit, the first function module F1(X) output 021 is connected with the input C21 of the second plus-minus module J 2, is connected with the flue gas oxygen content O of boiler on the input C22 of the second plus-minus module J 2
2The % signal, the output 022 of the second plus-minus module J 2 is connected with the input C25 of the first proportional integral derivative adjustment module PID1, the output 019 of the first proportional integral derivative adjustment module PID1 is connected with the input C24 of the 3rd addition module J8, the input C23 of the 3rd addition module J8 is connected with the output 018 of first modeling piece DX1, the boiler load command M of the input C19 of first modeling piece DX1 and boiler place unit
BConnect, the input C17 of first modeling piece DX1 is connected with the total fuel quantity signal B of boiler, the output 028 of the 3rd addition module J8 is connected with the input C36 of the second proportional integral derivative adjustment module PID2, the input C37 of the second proportional integral derivative adjustment module PID2 is connected with the output 020 of the first addition module addition module J3, the input C26 of the first addition module addition module J3 is connected with total primary air flow signal V1 of boiler, the input C27 of the first addition module addition module J3 is connected with total secondary air flow signal V2 of boiler, the output 025 of the second proportional integral derivative adjustment module PID2 respectively with pressure fan inlet guide vane control end A3, pressure fan inlet guide vane control end A4 be connected, the input C33 of differential module WF connects, furnace pressure setting value module P
0Output O23 with the 6th the plus-minus module J 9 input C28 be connected, the input C29 of the 6th plus-minus module J 9 is connected with the furnace pressure signal PS of boiler, the output 027 of the 6th plus-minus module J 9 is connected with the input C30 of the 3rd proportional integral derivative adjustment module PID3, the output 024 of the 3rd proportional integral derivative adjustment module PID3 is connected with the input C31 of the second addition module J4, the input C32 of the second addition module J4 is connected with the output 029 of differential module WF, the output 026 of the second addition module J4 is connected with the input C34 of the 3rd plus-minus module J 5 and the input C35 of the 4th plus-minus module J 6 respectively, be connected with enable override signal X1 on the subtrahend input of the 3rd plus-minus module J 5, be connected with another enable override signal X2 on the subtrahend input of the 4th plus-minus module J 6, be connected with the inlet guide vane control end A5 of air-introduced machine on the output of the 3rd plus-minus module J 5, be connected with the inlet guide vane control end A6 of air-introduced machine on the output of the 4th plus-minus module J 6.
The output 03 of fuel master controller is connected with the input C6 of feeder B, the output 031 of feeder B is connected with the input E3 of the 6th proportional integral derivative adjuster PID6 and the input D4 of the 7th proportional integral derivative adjuster PID7 respectively, the input D3 of the 6th proportional integral derivative adjuster PID6 is connected with boiler B mill primary air flow signal F2, be connected with boiler B on the input E4 of the 7th proportional integral derivative adjuster PID7 and grind force signal U2, the output 06 of the 6th proportional integral derivative adjuster PID6 is connected with the input C11 of second largest modeling piece DX2, and the output of the 7th proportional integral derivative adjuster PID7 is connected with boiler B mill grinding pressure control end P2.
The output 03 of fuel master controller is connected with the input C7 of feeder C, the output 032 of feeder C is connected with the input E5 of the 8th proportional integral derivative adjuster PID8 and the input D6 of the 9th proportional integral derivative adjuster PID9 respectively, the input D5 of the 8th proportional integral derivative adjuster PID8 is connected with boiler C mill primary air flow signal F3, be connected with boiler C on the input E6 of the 9th proportional integral derivative adjuster PID9 and grind force signal U3, the output 08 of the 8th proportional integral derivative adjuster PID8 is connected with the input C12 of second largest modeling piece DX2, and the output of the 9th proportional integral derivative adjuster PID9 is connected with boiler C mill grinding pressure control end P3.
The output 03 of fuel master controller is connected with the input C8 of feeder D, the output 033 of feeder D is connected with the input E7 of the tenth proportional integral derivative adjuster PID10 and the input D8 of the 11 proportional integral derivative adjuster PID11 respectively, the input D7 of the tenth proportional integral derivative adjuster PID10 is connected with boiler D mill primary air flow signal F4, be connected with boiler D on the input E8 of the 11 proportional integral derivative adjuster PID11 and grind force signal U4, the output 10 of the tenth proportional integral derivative adjuster PID10 is connected with the input C13 of second largest modeling piece DX2, and the output of the 11 proportional integral derivative adjuster PID11 is connected with boiler D mill grinding pressure control end P4.
The output 03 of fuel master controller is connected with the input C6 of feeder E, the output 034 of feeder E is connected with the input E9 of the 12 proportional integral derivative adjuster PID12 and the input D10 of the 13 proportional integral derivative adjuster PID13 respectively, the input D9 of the 12 proportional integral derivative adjuster PID12 is connected with boiler E mill primary air flow signal F5, be connected with boiler E on the input E10 of the 13 proportional integral derivative adjuster PID13 and grind force signal U5, the output 012 of the 12 proportional integral derivative adjuster PID12 is connected with the input C14 of second largest modeling piece DX2, and the output of the 13 proportional integral derivative adjuster PID13 is connected with boiler E mill grinding pressure control end P5.
Claims (2)
1. the combustion control system of a large electric power plant unit, comprise fuel master controller, fuel pressure regulating system, feeder, plus-minus module, function module and proportional integral derivative adjustment module, it is characterized in that, the input C1 of little modeling piece (XX) is connected with the total blast volume signal V of boiler place unit, the boiler load command M of the input C2 of little modeling piece (XX) and boiler place unit
BConnect, the output 01 of little modeling piece (XX) is connected with the input C3 of the first plus-minus module (J1), the input C18 of the first plus-minus module (J1) is connected with the total fuel quantity signal B of boiler, the output 02 of the first plus-minus module (J1) is connected with the input C4 of fuel master controller, the output 03 of fuel master controller is connected with the input C5 of feeder A, the output 030 of feeder A is connected with the input E1 of the 4th proportional integral derivative adjuster (PID4) and the input D2 of the 5th proportional integral derivative adjuster (PID5) respectively, the input D1 of the 4th proportional integral derivative adjuster (PID4) is connected with boiler A mill primary air flow signal F1, be connected with boiler A on the input E2 of the 5th proportional integral derivative adjuster (PID5) and grind force signal U1, the output 04 of the 4th proportional integral derivative adjuster (PID4) is connected with the input C10 of second largest modeling piece (DX2), the output of the 5th proportional integral derivative adjuster (PID5) is connected with boiler A mill grinding pressure control end P1, the output 014 of second largest modeling piece (DX2) and second function module (F2(X)) input C38 be connected, second function module (F2(X)) output 015 is connected with the input C15 that slender acanthopanax subtracts module (J7), the output O16 that slender acanthopanax subtracts module (J7) is connected with the input C16 of proportion differential adjustment module (PI), and the output O17 of proportion differential adjustment module (PI) is connected with primary air fan inlet guide vane control end A2 with primary air fan inlet guide vane control end A1 respectively; First function module (F1(X)) input C20 is connected with the main steam flow signal D of unit, first function module (F1(X)) output 021 is connected with the input C21 of the second plus-minus module (J2), is connected with the flue gas oxygen content O of boiler on the input C22 of the second plus-minus module (J2)
2The % signal, the output 022 of the second plus-minus module (J2) is connected with the input C25 of the first proportional integral derivative adjustment module (PID1), the output 019 of the first proportional integral derivative adjustment module (PID1) is connected with the input C24 of the 3rd addition module (J8), the input C23 of the 3rd addition module (J8) is connected with the output 018 of first modeling piece (DX1), the boiler load command M of the input C19 of first modeling piece (DX1) and boiler place unit
BConnect, the input C17 of first modeling piece (DX1) is connected with the total fuel quantity signal B of boiler, the output 028 of the 3rd addition module (J8) is connected with the input C36 of the second proportional integral derivative adjustment module (PID2), the input C37 of the second proportional integral derivative adjustment module (PID2) is connected with the output 020 of the first addition module addition module (J3), the input C26 of the first addition module addition module (J3) is connected with total primary air flow signal V1 of boiler, the input C27 of the first addition module addition module (J3) is connected with total secondary air flow signal V2 of boiler, the output 025 of the second proportional integral derivative adjustment module (PID2) respectively with pressure fan inlet guide vane control end A3, pressure fan inlet guide vane control end A4 be connected, the input C33 of differential module (WF) connects, furnace pressure setting value module (P
0) output O23 with the 6th the plus-minus module (J9) input C28 be connected, the input C29 of the 6th plus-minus module (J9) is connected with the furnace pressure signal PS of boiler, the output 027 of the 6th plus-minus module (J9) is connected with the input C30 of the 3rd proportional integral derivative adjustment module (PID3), the output 024 of the 3rd proportional integral derivative adjustment module (PID3) is connected with the input C31 of second addition module (J4), the input C32 of second addition module (J4) is connected with the output 029 of differential module (WF), the output 026 of second addition module (J4) is connected with the input C34 of the 3rd plus-minus module (J5) and the input C35 of the 4th plus-minus module (J6) respectively, be connected with enable override signal X1 on the subtrahend input of the 3rd plus-minus module (J5), be connected with another enable override signal X2 on the subtrahend input of the 4th plus-minus module (J6), be connected with the inlet guide vane control end A5 of air-introduced machine on the output of the 3rd plus-minus module (J5), be connected with the inlet guide vane control end A6 of air-introduced machine on the output of the 4th plus-minus module (J6).
2. the combustion control system of a kind of large electric power plant unit according to claim 1, it is characterized in that, the output 03 of fuel master controller is connected with the input C6 of feeder B, the output 031 of feeder B is connected with the input E3 of the 6th proportional integral derivative adjuster (PID6) and the input D4 of the 7th proportional integral derivative adjuster (PID7) respectively, the input D3 of the 6th proportional integral derivative adjuster (PID6) is connected with boiler B mill primary air flow signal F2, be connected with boiler B on the input E4 of the 7th proportional integral derivative adjuster (PID7) and grind force signal U2, the output 06 of the 6th proportional integral derivative adjuster (PID6) is connected with the input C11 of second largest modeling piece (DX2), and the output of the 7th proportional integral derivative adjuster (PID7) is connected with boiler B mill grinding pressure control end P2.
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