CN102063066B - Running simulation system of digital regulation design of combined heat and power type steam turbine - Google Patents
Running simulation system of digital regulation design of combined heat and power type steam turbine Download PDFInfo
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Abstract
The invention discloses a running simulation system of a digital regulation design of a combined heat and power type steam turbine, wherein an analog quantity calculation loop system is of a building block type combined structure taking a regulating unit as a unit; an idle running simulation regulating system is provided, and an idle running simulation platform is provided on the basis of the idle running simulation regulation system; and an electric and thermal-loading running simulation platform and an electric and thermal operating condition forbidden zone eluding function block loop are provided on the basis of the building block type combined structure of the analog quantity calculation loop system. The invention can be applied to the fast design; the design result of the system can ensure the static decoupling of electric and thermal running conditions of a system with more than four inputs and three outputs of regulation signals; the system can automatically evade the running forbidden zones of the electric and thermal running conditions; the performance test of various operating conditions can be carried out on the designed system by the simulation running process; and the system is conveniently operated.
Description
Technical field
The design of the present invention relates to many inputs, exporting the digital bias adjustment device of signal is the design of the Digital Controller of object with heat, CCHP formula steam turbine especially more.Specifically a kind of double design is provided and moves simulating, verifying in the cogeneration formula steam turbine digital adjusted design operating simulation system of one for the analog quantity counter circuit of regulator.
Technical background
At present; The cogeneration formula steam turbine digital adjusted design operating simulation system that cogeneration formula steam turbine digital is regulated the analog quantity counter circuit does not appear being exclusively used in market as yet; Be used for design department by means of versatility software; In general be that the SIMULINK (based on the emulation platform of block diagram) that after 1993, occurs is articulated on MATLAB (matrix experiment chamber) environment, carry out Aided Design with its calculating, drawing function.Because of it is not a special software, rational mathematical model for want of again is so can't accomplish under the requirement of satisfying static decoupling, to realize The Automation Design.Thereby more can not accomplish institute's result of design is moved emulation with the checking regulation quality.
Digital governer to many inputs, many outputs; Can't realize the static decoupling of electricity, thermal condition at present; Its main cause is: old computing method lack global concept, and what asked mainly is the difference relation in the transmittance process, can not try to achieve the absolute value of each operating condition and loop structure corresponding point relation; Therefore can not set up the mathematical model of reduction electricity, thermal condition adjustment process, and this is the condition precedent of development and Design operation simulation software.
Summary of the invention
The purpose of this invention is to provide a kind of cogeneration formula steam turbine digital adjusted design operating simulation system that can realize Static Decoupling Control for the adjusting of cogeneration formula steam turbine digital.
Technical solution of the present invention is:
A kind of cogeneration formula steam turbine digital adjusted design operating simulation system is characterized in that: its analog quantity counter circuit system is to be the brick pattern unitized construction of unit with the regulon; Establishment has charged, thermal load operation emulation platform and electricity, thermal condition forbidden zone to evade the functional block loop on the basis of the building block unitized construction of analog quantity counter circuit system; Other is provided with no-load run emulation regulating system, and establishment has no-load run operation emulation platform on no-load run emulation regulating system basis.
Described analog quantity counter circuit system is for being the brick pattern unitized construction of unit with the regulon, and primary structure is following:
Various cogeneration formula steam turbine digital is regulated the analog quantity counter circuit and is combined by the building block of following kind: rotating speed primary unit M1, one-level draw gas primary unit M2, secondary draw gas primary unit M3, the primary unit M4 that draws gas, steam discharge primary unit M5, power primary unit M6, the primary unit M7 of wealthy family, middle door primary unit M8, a low door primary unit M9, the comprehensive unit M10 of wealthy family, middle door comprehensive unit M11, a low door comprehensive unit M12; Be assembled into following type cogeneration formula steam turbine digital by above-mentioned 12 building blocks and regulate one of analog quantity computing system loop: the 1. secondary condensing-type system of drawing gas; 2. the one-level condensing-type system of drawing gas; 3. the back pressure type system of drawing gas; 4. back pressure type system.
Above-mentioned 4 types of steam turbine digitals adjusting building block array mode is following:
1. the secondary condensing-type system building block combination of drawing gas
The functional module loop of total system by: rotating speed primary unit M1, one-level draw gas primary unit M2, secondary draw gas primary unit M3, power primary unit M6, the primary unit M7 of wealthy family, middle door primary unit M8, a low door primary unit M9, the comprehensive unit M10 of wealthy family, middle door comprehensive unit M11, a low door comprehensive unit M12, totally 10 unit building blocks are formed.
The actual value of the input termination rotation speed of above-described rotating speed primary unit M1 and the digital signal of setting value after the A/D conversion, the output of rotating speed primary unit M1 are transported to the M10 of wealthy family's comprehensive unit, middle door comprehensive unit M11 and low door comprehensive unit M12 respectively;
One take out primary unit M2 the input termination from one take out flow actual value and the digital signal of setting value after the A/D conversion, one take out primary unit M2 output transport to the primary unit M7 of wealthy family, middle door primary unit M8, a low door primary unit M9 respectively;
Two take out primary unit M3 the input termination from two take out flow actual value and the digital signal of setting value after the A/D conversion, two take out primary unit M3 output transport to the primary unit M7 of wealthy family, middle door primary unit M8, a low door primary unit M9 respectively;
The input termination of power primary unit M6 is from the actual value and the digital signal of setting value after the A/D conversion of electric power, and the primary unit M7 of wealthy family, middle door primary unit M8, low door primary unit M9 are transported in the output of power primary unit M6 respectively;
The primary unit M7 of wealthy family acceptance is taken out the input signal that primary unit M2, two takes out primary unit M3, power primary unit M6 from one, and result of calculation exports the comprehensive unit M10 of wealthy family to;
A middle door primary unit M8 accepts to take out the input signal that primary unit M2, two takes out primary unit M3, power primary unit M6, door comprehensive unit M11 during result of calculation exports to from one;
Low door primary unit M9 acceptance is taken out the input signal that primary unit M2, two takes out primary unit M3, power primary unit M6 from one, and result of calculation exports a low door comprehensive unit M12 to;
The comprehensive unit M10 of wealthy family accepts the signal from rotating speed primary unit M1, the primary unit M7 of wealthy family, and result of calculation converts analog quantity to through D/A and transports to the high-pressure governing valve actuator;
In door comprehensive unit M11 accept signal from rotating speed primary unit M1, middle door primary unit M8, result of calculation through D/A convert to analog quantity transport in pressure pitch actuator;
Low door comprehensive unit M12 has accepted the signal from rotating speed primary unit M1, low door primary unit M9, and result of calculation converts analog quantity to through D/A and transports to low pressure pitch actuator.
2. the one-level condensing-type system building block combination of drawing gas
The functional module loop of total system is by rotating speed primary unit M1, the primary unit M4 that draws gas, power primary unit M6, the primary unit M7 of wealthy family, low door primary unit M9, the comprehensive unit M10 of wealthy family, low door comprehensive unit M12, and totally 7 unit building blocks are formed.
The actual value of the input termination rotation speed of above-described rotating speed primary unit M1 and the digital signal of setting value after the A/D conversion, the output of rotating speed primary unit M1 are transported to the comprehensive unit M10 of wealthy family, low door comprehensive unit M12 respectively;
Draw gas the input termination of primary unit M4 from the actual value of extraction flow and the digital signal of setting value after the A/D conversion; The primary unit M7 of wealthy family, a low door primary unit M9 are transported in the output of primary unit M4 of drawing gas respectively;
The input termination of power primary unit M6 is from the actual value and the digital signal of setting value after the A/D conversion of electric power; The primary unit M7 of wealthy family, low door primary unit M9 are transported in the output of power primary unit M6 respectively;
The primary unit M7 of wealthy family accepts the output signal from the primary unit M4 that draws gas, power primary unit M6, and result of calculation exports the comprehensive unit M10 of wealthy family to;
Low door primary unit M7 accepts the output signal from the primary unit M4 that draws gas, power primary unit M6, and result of calculation exports low door comprehensive unit M12 to;
The comprehensive unit M10 of wealthy family accepts the signal from rotating speed primary unit M1, the primary unit M7 of wealthy family, and result of calculation converts analog quantity to through D/A and transports to the high-pressure governing valve actuator;
Low door comprehensive unit is accepted the signal from rotating speed primary unit M1, low door primary unit M9, and result of calculation converts analog quantity to through D/A and transports to low pressure pitch actuator.
3. the back pressure type system of drawing gas building block combination
It only is that power primary unit M6 replaces to steam discharge primary unit M5 that the functional module loop structure of total system and above-mentioned one-level draw gas that the condensing-type system compares, and all the other are all identical;
4. back pressure type system building block combination
The functional block loop of total system is by rotating speed primary unit M1, steam discharge primary unit M5, the comprehensive unit M10 of wealthy family, and totally 3 unit building blocks are formed;
The actual value of the input termination rotation speed of above-described rotating speed primary unit M1 and the digital signal of setting value after the A/D conversion, the comprehensive unit M10 of wealthy family is transported in the output of rotating speed primary unit M1;
The input termination of steam discharge primary unit M5 is from the actual value and the digital signal of setting value after the A/D conversion of exhaust steam flow, and the comprehensive unit M10 of wealthy family is transported in the output of steam discharge primary unit M5, and result of calculation converts analog quantity to through D/A and transports to the high-pressure governing valve actuator.
The computation core of described no-load run emulation regulating system part is formed a loop jointly by input, output signal and controller, its middle controller by speed regulator, transmission link, join three calculating of vapour link link and form.The rotating speed master sets D
n, the auxilliary D that sets of rotating speed
n 1, 2 signal input summer ∑s 1 are again through multiplier P
1Back input summer ∑
2The actual speed n of input inputs to totalizer ∑ 2 through phase inverter AF, and the result of calculation of totalizer ∑ 2 is transported to multiplier P
2Formed the voltage signal U after tach signal is put in order thus in speed regulator
n, import the multiplier P in the transmission link then
3, form U
G, convert high-pressure governing valve aperture signal m output to.
Described charged, thermal load operation emulation platform, its core is the CPU that the building block combined loop of analog quantity computing system constitutes.With the secondary condensing-type system of drawing gas is example, and be exactly particularly: CPU has 4 road input signals, that is: rotating speed, power, one-level are drawn gas, secondary draws gas analog quantity; Have 3 tunnel output signals, that is: go to the analog quantity of control high-pressure governing valve, middle pressure pitch, low pressure pitch.Then with controlled plant---the output of steam turbine, input join end to end with input, the output signal of CPU respectively, have constituted a closed loop emulation platform therefrom.
Described electricity, thermal condition forbidden zone are evaded the functional block loop structure and be: one takes out the output X3 of primary unit M2, receives logic element " the low value gating functional block of drawing gas "; Two take out primary unit M3 output X2 receive another low value gating functional block of drawing gas; Power primary unit M6 exports X1, is divided into 3 the tunnel: the one tunnel and transports to 3 primary units of regulating porthole; 2 the tunnel transport to above-mentioned 2 low value gating functional blocks of drawing gas respectively in addition, like this, every the low value gating functional block of drawing gas all is connected to from power and the signal that draws gas; The function of low value gating of drawing gas is that the amount of drawing gas only less than the power analog quantity time, is drawn gas and could be imported controller.
Beneficial effect of the present invention:
For cogeneration formula steam turbine digital design of Regulator, research, faculty provide a kind of new emulation tool, it can: 1. be used for quick design.The designer only needs known conditions is imported the computer screen picture, can generate the analog quantity computing system functional block loop design drawing of band parameter value; 2. to the system of 4 inputs of conditioning signal as many as, 3 outputs, design result can be guaranteed the static decoupling of electricity, hot operating condition; 3. the operation forbidden zone that can evade electricity, thermal condition automatically; 4. through the simulation run process institute's designed system is carried out the performance verification of various operating modes; 5. help the design mistake of analyzing and processing existing controller analog quantity framework; 6. move the emulated interface imagery, help the simulated teaching of school; 7. widely applicable, can be used for conventional hydraulic type regulating system simultaneously; 8. easy and simple to handle.Need not carry out any programming and calculating when the present invention uses, simulation operations is that the simulated field sequence of operation obtains required result.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the present invention is described further.
Fig. 1 is building block, information flow constitutional diagram (secondary draw gas condensing-type regulating system).
Fig. 2 is building block, information flow constitutional diagram (one-level draw gas condensing-type regulating system).
Fig. 3 is building block, information flow constitutional diagram (the back pressure type regulating system of drawing gas).
Fig. 4 is building block, information flow constitutional diagram (back pressure type regulating system).
Fig. 5 is analog quantity computing system functional block gain calculating figure as a result.
Fig. 6 is no-load run emulation regulating loop figure.
Fig. 7 no-load run emulation platform figure.
Fig. 8 electricity, thermal load operation emulation platform figure.
Fig. 9 electricity, thermal condition are evaded loop, forbidden zone design drawing.
Embodiment
A kind of cogeneration formula steam turbine digital adjusted design operating simulation system is characterized in that: its analog quantity counter circuit system is to be the brick pattern unitized construction of unit with the regulon; Establishment has charged, thermal load operation emulation platform and electricity, thermal condition forbidden zone to evade the functional block loop on the basis of the building block unitized construction of analog quantity counter circuit system; Other is provided with no-load run emulation regulating system, and establishment has no-load run operation emulation platform on no-load run emulation regulating system basis.
1, cogeneration formula steam turbine digital regulating system building block kind
Cogeneration formula steam turbine digital is regulated the analog quantity counter circuit and is combined by the building block of following kind: rotating speed primary unit (M1), one-level draw gas primary unit (M2), secondary draw gas primary unit (M3), the primary unit that draws gas (M4), steam discharge primary unit (M5), power primary unit (M6), wealthy family's primary unit (M7), middle door primary unit (M8), a low door primary unit (M9), wealthy family's comprehensive unit (M10), middle door comprehensive unit (M11), a low door comprehensive unit (M12).Can be assembled into following type cogeneration formula steam turbine digital by above-mentioned 12 building blocks and regulate analog quantity computing system loop: the 1. secondary condensing-type system of drawing gas; 2. the one-level condensing-type system of drawing gas; 3. steam-extracting type back pressure type system; 4. back pressure type system.
2, cogeneration formula steam turbine digital is regulated the building block array mode
Described 4 types of steam turbine digitals adjusting building block array mode is following.
The condensing-type system building block combination 2.1 secondary draws gas
As shown in Figure 1:
This is a kind of brick pattern unitized construction; The functional module loop of total system by: rotating speed primary unit M1, one-level draw gas primary unit M2, secondary draw gas primary unit M3, power primary unit M6, the primary unit M7 of wealthy family, middle door primary unit M8, a low door primary unit M9, the comprehensive unit M10 of wealthy family, middle door comprehensive unit M11, a low door comprehensive unit M12, totally 10 unit building blocks are formed.
The actual value and the setting value of the input termination rotation speed of above-described rotating speed primary unit M1, the digital signal after the A/D conversion; The M11 and the low door comprehensive unit M12 of the M10 of wealthy family's comprehensive unit, middle door comprehensive unit transported in the output of M1 respectively.
One take out primary unit M2 the input termination from one take out flow actual value and setting value, the digital signal after the A/D conversion; The primary unit M7 of wealthy family, middle door primary unit M8, low door primary unit M9 are transported in the output of M2 respectively.
Two take out primary unit M3 the input termination from two take out flow actual value and setting value, the digital signal after the A/D conversion; The primary unit M7 of wealthy family, middle door primary unit M8, low door primary unit M9 are transported in the output of M3 respectively.
The input termination of power primary unit M6 is from the actual value and the setting value of electric power, the digital signal after the A/D conversion; The primary unit M7 of wealthy family, middle door primary unit M8, low door primary unit M9 are transported in the output of M6 respectively.
The primary unit M7 of wealthy family has accepted the input signal from M2, M3, M6, and result of calculation exports the comprehensive unit M10 of wealthy family to.
A middle door primary unit M8 has accepted the input signal from M2, M3, M6, door comprehensive unit M11 during result of calculation exports to.
Low door primary unit M9 has accepted the input signal from M2, M3, M6, and result of calculation exports low door comprehensive unit M12 to.
The comprehensive unit M10 of wealthy family has accepted the signal from M1, M7, and result of calculation converts analog quantity to through D/A and transports to the high-pressure governing valve actuator.
In a door comprehensive unit M11 accepted signal from M1, M8, result of calculation through D/A convert to analog quantity transport in pressure pitch actuator.
Low door comprehensive unit M12 has accepted the signal from M1, M9, and result of calculation converts analog quantity to through D/A and transports to low pressure pitch actuator.
The condensing-type system building block combination 2.2 one-level is drawn gas
As shown in Figure 2.
This is a kind of brick pattern unitized construction; The functional module loop of total system is by rotating speed primary unit M1, the primary unit M4 that draws gas, power primary unit M6, the primary unit M7 of wealthy family, low door primary unit M9, the comprehensive unit M10 of wealthy family, low door comprehensive unit M12, and totally 7 unit building blocks are formed.
The actual value of the input termination rotation speed of above-described rotating speed primary unit M1 and the digital signal of setting value after the A/D conversion; The comprehensive unit M10 of wealthy family, low door comprehensive unit M12 are transported in the output of M1 respectively.
Draw gas the input termination of M4 of primary unit from the actual value and the setting value of extraction flow, the digital signal after the A/D conversion; The primary unit M7 of wealthy family, low door primary unit M9 are transported in the output of M4 respectively.
The input termination of power primary unit M6 is from the actual value and the setting value of electric power, the digital signal after the A/D conversion; The primary unit M7 of wealthy family, low door primary unit M9 are transported in the output of M6 respectively.
The primary unit M7 of wealthy family has accepted the output signal from M4, M6, and result of calculation exports the comprehensive unit M10 of wealthy family to.
Low door primary unit M7 accepts the output signal from M4, M6, and result of calculation exports low door comprehensive unit M12 to.
The comprehensive unit M10 of wealthy family has accepted the signal from M1, M7, and result of calculation converts analog quantity to through D/A and transports to the high-pressure governing valve actuator.
Low door comprehensive unit M12 has accepted the signal from M1, M9, and result of calculation converts analog quantity to through D/A and transports to low pressure pitch actuator.
The back pressure type system building block combination 2.3 draw gas
As shown in Figure 3.
This is a kind of brick pattern unitized construction, and it only is that power primary unit M6 replaces to steam discharge primary unit M5 that the functional module loop structure of total system and one-level shown in Figure 2 draw gas that the condensing-type system compares, and all the other are all identical.
2.4 back pressure type system building block combination
As shown in Figure 4.
This is a kind of modular construction, and the functional block loop of total system is by rotating speed primary unit M1, steam discharge primary unit M5, the comprehensive unit M10 of wealthy family, and totally 3 unit building blocks are formed.
The actual value of the input termination rotation speed of above-described rotating speed primary unit M1 and the digital signal of setting value after the A/D conversion.The comprehensive unit M10 of wealthy family is transported in the output of M1.
The input termination of steam discharge primary unit is from the actual value and the setting value of exhaust steam flow, the digital signal after the A/D conversion, and the comprehensive unit M10 of wealthy family is transported in the output of M5, and result of calculation converts analog quantity to through D/A and transports to the high-pressure governing valve actuator.
3, set up mathematical model
A regulating system, any one input all has a mathematical model with signal flow between the output, and when input signal has a, the output signal has b, then need set up the mathematical model that a * b=N organizes the single loop structure.Again this N group mathematical model simultaneous is become b pitch system of equations mathematical model.Its loop is connected the integrally-regulated system promptly constituted by building block information flow constitutional diagram.
Fig. 1, Fig. 2, Fig. 3, Fig. 4 have shown the mathematical model that all kinds of cogeneration formula steam turbine control systems need be set up.
Above-described mathematical model is example (Fig. 1) with the secondary steam bleeding system, and input quantity has 4 (rotating speed, one-level are drawn gas, secondary draws gas, power analog quantity); Output quantity has 3 (high-pressure governing valve, middle pressure pitch, low pressure pitch aperture analog quantitys).
Therefore, the single loop mathematical model has 4 * 3=12.These 12 equations are the foundation of design single loop structure.
For example rotating speed---wealthy family's equation can be formed speed control loop, is used for governing system idling lotus l-G simulation test.
More than 12 equations be divided into following 3 big groups:
The high-pressure governing valve system of equations, by following equations simultaneousness:
Rotating speed---wealthy family's equation 1., one take out that---wealthy family's equation 4., wealthy family's equation 10. two to take out---wealthy family's equation 7., power---.
In press the pitch system of equations, by following equations simultaneousness:
Rotating speed---middle door equation 2., one take out---middle door equation 5., two take out---middle door equation; 8., power---middle door equation (11).
Low pressure pitch system of equations, by following equations simultaneousness:
Rotating speed---low door equation 3., one take out---low door equation 6., two take out---low door equation 9., power---low door equation (12).
System of equations behind the simultaneous has determined the relation of 4 input quantities and 3 pitch apertures respectively.
The functional block loop diagram that above-mentioned high-pressure governing valve system of equations, middle pressure pitch system of equations and low pressure pitch system of equations constitute, again by relation shown in Figure 1 connect the regulating system loop structure of an integral body.
By the combination of this rule, can constitute the regulating system of many arbitrarily inputs, output information.
4, known conditions input mode
To all kinds of steam turbine control systems that propose meter, only need import following known conditions: 1. momentary speed variation, pressure variation rate; 2. under electricity, unloaded, the full load conditions of thermal condition, respectively regulate the porthole aperture accordingly.Numerical value is all expressed with normalized analog electrical value.Be exactly specifically operating condition (like rotating speed, power thermal load) be zero, be 0VDC (4mA); Be ratings or fully loaded, all be decided to be 5VDC or 10VDC (20mA).
The described secondary condensing-type regulating system of drawing gas, the input known conditions is seen table 1.
Table 1
The described one-level condensing-type regulating system of drawing gas, the input known conditions is seen table 2.
Table 2:
The described back pressure type regulating system of drawing gas, the input known conditions is seen table 3.
Table 3:
Described back pressure type regulating system, the input known conditions is seen table 3.
Table 4:
5, generate regulating system analog quantity functional block loop design drawing
When designing the regulating system of above-mentioned arbitrary type, on the computing machine panel, normalized analog value input is shown in the corresponding table of 1-table 4, the functional block loop design drawing of analog quantity computing system will generate automatically.Occur " analog quantity computing system functional block gain calculating result " as shown in Figure 5 simultaneously, wherein will generate the yield value of all multiplier function sign indicating numbers.As changing known conditions, yield value changes thereupon.
6, no-load run emulation regulating system design
To the functional block loop diagram that is designed, can through the screen picture simulation operations in order to verify its idling lotus adjusting function.
6.1 make the no-load run emulation platform
With the 3rd joint described algebraic expression " rotating speed---wealthy family's equation ", convert " the no-load run emulation regulating loop figure " of electronic loop structure to, as shown in Figure 6.
The computation core of described " no-load run emulation regulating system " part by input, output signal and speed regulator, transmission link, join three of vapour links and calculate link and form.The rotating speed master sets Dn, the auxilliary Dn of setting of rotating speed
1, 2 signal input summer ∑ 1, input summer ∑s 2 behind multiplier P1 again.The actual speed n of input inputs to ∑ 2 through phase inverter AF.The result of calculation of totalizer ∑ 2 is transported to multiplier P2.Form the voltage signal Un after tach signal is put in order thus in speed regulator, imported the multiplier P3 in the transmission link then, formed U
G, convert high-pressure governing valve aperture signal m output to.
In addition conversion on the basis of Fig. 6 promptly becomes screen picture " no-load run emulation platform figure ".As shown in Figure 7.
Described no-load run emulation platform figure specifically is exactly: figure is made up of two parts, and the top is Fig. 7 (a) " an initial conditions form ", and the square frame in the table is used to import the design conditions data; The below is Fig. 7 (b) " no-load run emulation platform figure ".Fig. 7 (b) will import---and the adjustment process of output and controlled plant steam turbine join end to end and constitute a closed loop.In the square frame among the figure is computational data, and divide 3 parts: the left side is an input signal---actual speed, rotating speed master set, rotating speed is auxilliary sets; The right side is output signal---high-pressure governing valve aperture; The centre is a calculating parameter---speed regulator parameter, transmission link parameter.The figure illustrates the computational data of certain operating point.
Be provided with under Fig. 7 " no load test is summary view as a result ".This figure has gathered the idling lotus control characteristic of the governing system that imposes a condition down.This figure is made up of two parts: the top is the no load test summary sheet, the total result that the three-dimensional coordinate of the synchronizer position when this table has gathered simulation operations, rotating speed, high-pressure governing valve aperture calculates; The below is to generate idling lotus static characteristics line chart based on the no load test summary sheet.
6.2 no-load run simulation operations
Application drawing 7 (a) is imported square frame with design conditions, and once affirmation, P1, P2, P3 value in Fig. 7 (b) no-load run emulation platform promptly generate, and the change value of inputing or outputing can be simulated no-load run and carry out simulation operations.Image has shown the transient data of operating condition of test point.
Through the no-load run simulation operations, can implement following pilot project:
When certain synchronizer position, handle the high-pressure governing valve aperture and change rotating speed, can carry out first test of idling lotus, holding property of checking primary frequency modulation;
Under unloaded pitch aperture, handle synchronizer and change rotating speed, can carry out second test of idling lotus, checking frequency modulation frequency modulation characteristic;
Under pure condensate, heat supply operating mode, get rid of electricity, thermal load record highest stabilizing rotating speed respectively;
Change each link gain respectively, the rate of change of regulating the speed;
The error running mode is set, the analysis correction method.
Test has gathered the idling lotus control characteristic of the governing system that imposes a condition down.
7, charged, thermal load operation simulation software design
To the regulating system that is designed, can be through screen picture simulation operations, heat load adjustment performance charged to examine.
7.1 make charged, thermal load operation emulation platform
Here explain with the secondary condensing-type regulating system of drawing gas.
Described secondary draws gas, and " electricity, thermal load operation emulation platform figure " is as shown in Figure 8 for the condensing-type regulating system.This figure is made up of two parts: the top is Fig. 8 (a) " initial conditions form ", and the square frame in the table is used to import the design conditions data; The below is Fig. 8 (b) " electricity, thermal load operation emulation platform figure.”
The manufacturing process of described electricity, thermal load simulation run platform figure is exactly: based on building block shown in Figure 1, information flow constitutional diagram; 12 groups of mathematical models describing the mono signal adjustment process are changed into functional block regulating loop figure by method shown in Figure 6 respectively, and this is the CPU of emulation.CPU has 4 road input signals, that is: rotating speed, power, one-level are drawn gas, secondary draws gas analog quantity; Have 3 tunnel output signals, that is: go to the analog quantity of control high-pressure governing valve, middle pressure pitch, low pressure pitch.Then with controlled plant---the output of steam turbine, input join end to end with input, the output signal of CPU respectively.Be exactly particularly: connect CPU output line, will go high-pressure governing valve output signal to be connected to the high pressure cylinder import, press pitch output signal to be connected to the intermediate pressure cylinder import in going, go low pressure pitch output signal to be connected to the low pressure (LP) cylinder import.Connect the CPU input link again, with turbine speed switch through fast primary unit import, high pressure cylinder steam discharge connect one take out primary unit import, intermediate pressure cylinder steam discharge connect two take out the primary unit import, generator power connects the import of power primary unit.Constituted the closed loop system of one 4 input, 3 outputs therefrom.So far, the emulation platform based on block diagram promptly forms.
Behind design conditions input Fig. 8 (a), 8 (b) promptly activate, import, output terminal will show normalization analog quantity.Each pitch aperture amount of output terminal is with numeral and the expression of red line rod.
The figure illustrates the computational data of certain electricity, thermal condition point.
After Fig. 8, generate " electrothermal load test findings summary view ".It gathered rotating speed, power, one take out, two take out following 3 the pitch apertures of all working conditions change control characteristic.Among the figure, represent to move the border, forbidden zone with transformable step-like red line, the red line left side is the forbidden zone.
7.2 charged, thermal load operation simulation operations
Application drawing 8 (a), with design conditions data input square frame, the whole adjusting parameter values among Fig. 8 (b) " charged, thermal load operation emulation platform " promptly generate the operation l-G simulation test that rotating speed, power are set, the operating mode of drawing gas can be carried out following project:
Set unloaded full-loading condition, examine each pitch aperture, checking is from whole accuracy rate (will be 100%);
The error running mode of electricity, thermal condition is set, shows adjustment process, analyze the mode of evading;
Simulate onlinely, change the gain of each link, the rate of change of regulating the speed, pressure variation rate;
Simulate onlinely, change the gain of each link, measure static control characteristic;
Simulate online, design governing system dead band module parameter;
Electric load dropped into down and draws gas in low year, and the pitch aperture gets into the forbidden zone characteristic;
Electricity, heat are fully loaded with down, the electrical network low-cycle operation, and the pitch aperture gets into the forbidden zone characteristic;
Under electricity, the heat zero load, the operation of electrical network high frequency, the pitch aperture gets into the forbidden zone characteristic;
In the test, emulation platform has shown input, the output data of running operating point, and all static characteristics will be created in the electrothermal load test findings summary view.
8, the function design is evaded in electricity, thermal condition forbidden zone
Described electrothermal load test findings summary view, the pitch aperture relation when having reflected variable working condition.Wherein, represent the border, forbidden zone with the stepped appearance red line, red line left side is the operation forbidden zone, promptly in, low pressure regulates porthole and loses the zone from whole performance because of aperture is too small.
Function is evaded in described electricity, thermal condition forbidden zone, is to realize through a kind of logic element " the low value gating functional block of drawing gas " that the input of drawing gas is awarded restriction is set in regulating system functional block loop, and is as shown in Figure 9.Its function is in the loop, and the analog quantity of drawing gas only less than the power analog quantity time, is drawn gas and could be imported controller.Its effect is: 1. realize evading automatically of electricity, hot operating condition forbidden zone; When 2. power disappears, the control excision automatically of drawing gas.
The functional block loop structure of many signal conditioning systems tool decoupling performance of the present invention is actually by the formal transformation of static characteristics mathematical model to electronic loop.The theoretical foundation of mathematical model is now with the described rotating speed of Fig. 1---and wealthy family's equation explains that its relation of regulating is described by following formula:
Speed regulator: n=k
TransferU
n+ b
Transfer(1)
Transmission link: u
n=-k
PassU
G+ b
Pass(2)
Join vapour link: u
G=k
JoinN+b
Join(3)
After above-mentioned 3 formulas of simultaneous, get and regulate system mathematic model under the pure condensate operating mode:
N=-(k
TransferK
PassK
Join) N+{b
Transfer+ (k
TransferB
Pass)+[k
Transfer(k
Pass)+b
Join] (4)
The letter with become:
N=-k
SystemN+b
System(5)
In the formula: n is a turbine speed, r/min; N is a power; k
TransferBe the controller properties line slope; k
PassBe the transmission link slope; k
JoinFor joining vapour link characteristic line slope; k
SystemBe regulating system characteristic line slope; b
TransferBe controller properties line n y-intercept; b
PassU for the transmission link characteristic
nY-intercept, u
nBe rotating speed primary unit output dc voltage, V; b
JoinFor joining the u of vapour link characteristic line
GY-intercept, u
GBe wealthy family's comprehensive unit output voltage, V; b
SystemN y-intercept for the regulating system characteristic line.
In the above-mentioned formula, the algebraic expression of formula (4) is convertible into functional block electronic loop structure (Fig. 6), has been made on this basis to supply " no-load run emulation " platform (Fig. 7) operated.
Be the loop structure that single input, single output are regulated as stated.To design secondary draw gas condensing-type, one-level draw gas condensing-type, the condensing-type that draws gas, back pressure type regulating system; Then can be by carry out the combination of equations simultaneousness and building block like Fig. 1,2,3,4 described modes; Can make " charged, thermal load operation emulation platform ", carry out the on-load simulation operations.
Explanation about the present invention's abbreviation
The present invention is called for short HEDAB, is the abbreviation of following English word: heat
electricity
numeral
laboratory
Claims (5)
1. cogeneration formula steam turbine digital adjusted design operating simulation system, it is characterized in that: its analog quantity counter circuit system is to be the brick pattern unitized construction of unit with the regulon; Be provided with no-load run emulation regulating system, and establishment there is the no-load run emulation platform on no-load run emulation regulating system basis; Establishment has charged, thermal load operation emulation platform and electricity, thermal condition forbidden zone to evade the functional block loop on the basis of the building block unitized construction of analog quantity counter circuit system; Described analog quantity counter circuit system is for being the brick pattern unitized construction of unit with the regulon, and primary structure is following:
Various cogeneration formula steam turbine digital is regulated the analog quantity counter circuit and is combined by the building block of following kind: rotating speed primary unit M1, one-level draw gas primary unit M2, secondary draw gas primary unit M3, the primary unit M4 that draws gas, steam discharge primary unit M5, power primary unit M6, the primary unit M7 of wealthy family, middle door primary unit M8, a low door primary unit M9, the comprehensive unit M10 of wealthy family, middle door comprehensive unit M11, a low door comprehensive unit M12; Be assembled into following type cogeneration formula steam turbine digital by above-mentioned 12 building blocks and regulate one of analog quantity computing system loop: the 1. secondary condensing-type system of drawing gas; 2. the one-level condensing-type system of drawing gas; 3. the back pressure type system of drawing gas; 4. back pressure type system;
Above-mentioned 4 types of steam turbine digitals adjusting building block array mode is following:
1. the secondary condensing-type system building block combination of drawing gas
The functional module loop of total system is by rotating speed primary unit M1, one-level draw gas primary unit M2, secondary draw gas primary unit M3, power primary unit M6, the primary unit M7 of wealthy family, middle door primary unit M8, a low door primary unit M9, the comprehensive unit M10 of wealthy family, middle door comprehensive unit M11, a low door comprehensive unit M12, and totally 10 unit building blocks are formed;
The actual value of the input termination rotation speed of above-described rotating speed primary unit M1 and the digital signal of setting value after the A/D conversion, the output of rotating speed primary unit M1 are transported to the comprehensive unit M10 of wealthy family, middle door comprehensive unit M11 and low door comprehensive unit M12 respectively;
One-level draw gas primary unit M2 the input termination from one take out flow actual value and the setting value digital signal after the A/D conversion, the primary unit M7 of wealthy family, middle door primary unit M8, a low door primary unit M9 are transported in the draw gas output of primary unit M2 of one-level respectively;
Secondary draw gas primary unit M3 the input termination from two take out flow actual value and the setting value digital signal after the A/D conversion, the primary unit M7 of wealthy family, middle door primary unit M8, a low door primary unit M9 are transported in the draw gas output of primary unit M3 of secondary respectively;
The input termination of power primary unit M6 is from the actual value and the digital signal of setting value after the A/D conversion of electric power, and the primary unit M7 of wealthy family, middle door primary unit M8, low door primary unit M9 are transported in the output of power primary unit M6 respectively;
The primary unit M7 of wealthy family accepts from one-level the draw gas input signal of primary unit M3, power primary unit M6 of primary unit M2, secondary that draws gas, and result of calculation exports the comprehensive unit M10 of wealthy family to;
In door primary unit M8 accept from one-level the draw gas input signal of primary unit M3, power primary unit M6 of primary unit M2, secondary that draws gas, door comprehensive unit M11 during result of calculation exports to;
Low door primary unit M9 accepts from one-level the draw gas input signal of primary unit M3, power primary unit M6 of primary unit M2, secondary that draws gas, and result of calculation exports a low door comprehensive unit M12 to;
The comprehensive unit M10 of wealthy family accepts the signal from rotating speed primary unit M1, the primary unit M7 of wealthy family, and result of calculation converts analog quantity to through D/A and transports to the high-pressure governing valve actuator;
In door comprehensive unit M11 accept signal from rotating speed primary unit M1, middle door primary unit M8, result of calculation through D/A convert to analog quantity transport in pressure pitch actuator;
Low door comprehensive unit M12 has accepted the signal from rotating speed primary unit M1, low door primary unit M9, and result of calculation converts analog quantity to through D/A and transports to low pressure pitch actuator;
2. the one-level condensing-type system building block combination of drawing gas
The functional module loop of total system is by rotating speed primary unit M1, the primary unit M4 that draws gas, power primary unit M6, the primary unit M7 of wealthy family, low door primary unit M9, the comprehensive unit M10 of wealthy family, low door comprehensive unit M12, and totally 7 unit building blocks are formed;
The actual value of the input termination rotation speed of above-described rotating speed primary unit M1 and the digital signal of setting value after the A/D conversion, the output of rotating speed primary unit M1 are transported to the comprehensive unit M10 of wealthy family, low door comprehensive unit M12 respectively;
Draw gas the input termination of primary unit M4 from the actual value of extraction flow and the digital signal of setting value after the A/D conversion; The primary unit M7 of wealthy family, a low door primary unit M9 are transported in the output of primary unit M4 of drawing gas respectively;
The input termination of power primary unit M6 is from the actual value and the digital signal of setting value after the A/D conversion of electric power; The primary unit M7 of wealthy family, low door primary unit M9 are transported in the output of power primary unit M6 respectively;
The primary unit M7 of wealthy family accepts the output signal from the primary unit M4 that draws gas, power primary unit M6, and result of calculation exports the comprehensive unit M10 of wealthy family to;
Low door primary unit M9 accepts the output signal from the primary unit M4 that draws gas, power primary unit M6, and result of calculation exports low door comprehensive unit M12 to;
The comprehensive unit M10 of wealthy family accepts the signal from rotating speed primary unit M1, the primary unit M7 of wealthy family, and result of calculation converts analog quantity to through D/A and transports to the high-pressure governing valve actuator;
Low door comprehensive unit M12 accepts the signal from rotating speed primary unit M1, low door primary unit M9, and result of calculation converts analog quantity to through D/A and transports to low pressure pitch actuator;
3. the back pressure type system of drawing gas building block combination
It only is that power primary unit M6 replaces to steam discharge primary unit M5 that the functional module loop structure of total system and above-mentioned one-level draw gas that the condensing-type system compares, and all the other are all identical;
4. back pressure type system building block combination
The functional block loop of total system is by rotating speed primary unit M1, steam discharge primary unit M5, the comprehensive unit M10 of wealthy family, and totally 3 unit building blocks are formed;
The actual value of the input termination rotation speed of above-described rotating speed primary unit M1 and the digital signal of setting value after the A/D conversion, the comprehensive unit M10 of wealthy family is transported in the output of rotating speed primary unit M1;
The input termination of steam discharge primary unit M5 is from the actual value and the digital signal of setting value after the A/D conversion of exhaust steam flow, and the comprehensive unit M10 of wealthy family is transported in the output of steam discharge primary unit M5, and result of calculation converts analog quantity to through D/A and transports to the high-pressure governing valve actuator.
2. cogeneration formula steam turbine digital adjusted design operating simulation system according to claim 1; It is characterized in that: the computation core of described no-load run emulation regulating system part is formed a loop jointly by input, output signal and controller, its middle controller by speed regulator, transmission link, join three calculating of vapour link link and form; The rotating speed master sets D
n, the auxilliary D that sets of rotating speed
n 1, 2 signals are input to totalizer ∑ 1, again through multiplier P
1Back input summer ∑
2The actual speed n of input inputs to totalizer ∑ 2 through phase inverter AF, and the result of calculation of totalizer ∑ 2 is transported to multiplier P
2Formed the voltage signal U after tach signal is put in order thus in speed regulator
n, import the multiplier P in the transmission link then
3, form U
G, convert high-pressure governing valve aperture signal m output to.
3. claims 1 described cogeneration formula steam turbine digital adjusted design operating simulation system; It is characterized in that: described charged, thermal load operation emulation platform; Its core is the CPU that the building block combined loop of analog quantity computing system constitutes; CPU has input signal and has the output signal, and the output signal is the analog quantity of going to each pitch of control.
4. claims 3 described cogeneration formula steam turbine digital adjusted design operating simulation systems; It is characterized in that: in secondary draws gas the condensing-type system; Charged, thermal load operation emulation platform is: connect CPU output line; To go high-pressure governing valve output signal to be connected to the high pressure cylinder import; Press pitch output signal to be connected to the intermediate pressure cylinder import in going, go low pressure pitch output signal to be connected to the low pressure (LP) cylinder import, connect the CPU input link again; Turbine speed is switched through fast primary unit M1 import, high pressure cylinder steam discharge connect draw gas primary unit M2 import, intermediate pressure cylinder steam discharge of one-level and connect draw gas primary unit M3 import, generator power of secondary and connect power primary unit M6 import, constituted the closed loop system of one 4 input, 3 outputs therefrom.
5. cogeneration formula steam turbine digital adjusted design operating simulation system according to claim 1; It is characterized in that: described electricity, thermal condition forbidden zone are evaded the functional block loop structure and are: the output X3 that one-level is drawn gas primary unit M2, receive logic element " the low value gating functional block of drawing gas "; The draw gas output X2 of primary unit M3 of secondary receives another low value gating functional block of drawing gas; Power primary unit M6 exports X1, is divided into 3 the tunnel: the one tunnel and transports to 3 primary units of regulating porthole; 2 the tunnel transport to above-mentioned 2 low value gating functional blocks of drawing gas respectively in addition, like this, every the low value gating functional block of drawing gas all is connected to from power and the signal that draws gas; The function of low value gating of drawing gas is that the amount of drawing gas only less than the power analog quantity time, is drawn gas and could be imported controller.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104074562A (en) * | 2013-03-27 | 2014-10-01 | 株式会社日立制作所 | Steam turbine power plant |
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| CN2351555Y (en) * | 1998-05-30 | 1999-12-01 | 徐大懋 | High-pressure end driving load, low-pressure end disconncting cogeneration steam turbine |
| EP1647676A1 (en) * | 2004-10-12 | 2006-04-19 | Siemens Aktiengesellschaft | Method for simulating the operating characteristics of a steam turbine plant |
| CN2911748Y (en) * | 2006-05-26 | 2007-06-13 | 田鹤年 | Digital regulation system of sucking condensing turbine |
| RU2334880C1 (en) * | 2006-12-11 | 2008-09-27 | Открытое Акционерное Общество "Теплоэнергосервис-ЭК" (ОАО "Теплоэнергосервис-ЭК") | Cogeneration steam turbine |
| CN101846416A (en) * | 2010-04-29 | 2010-09-29 | 华北电力大学 | System and method for realizing area combined cooling heat by cogeneration coupling heat pump |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2351555Y (en) * | 1998-05-30 | 1999-12-01 | 徐大懋 | High-pressure end driving load, low-pressure end disconncting cogeneration steam turbine |
| EP1647676A1 (en) * | 2004-10-12 | 2006-04-19 | Siemens Aktiengesellschaft | Method for simulating the operating characteristics of a steam turbine plant |
| CN2911748Y (en) * | 2006-05-26 | 2007-06-13 | 田鹤年 | Digital regulation system of sucking condensing turbine |
| RU2334880C1 (en) * | 2006-12-11 | 2008-09-27 | Открытое Акционерное Общество "Теплоэнергосервис-ЭК" (ОАО "Теплоэнергосервис-ЭК") | Cogeneration steam turbine |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104074562A (en) * | 2013-03-27 | 2014-10-01 | 株式会社日立制作所 | Steam turbine power plant |
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