CN102998977B - Self-adaptation marine condenser Process Control System and its implementation - Google Patents
Self-adaptation marine condenser Process Control System and its implementation Download PDFInfo
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Abstract
A kind of self-adaptation marine condenser Process Control System, relate to marine condenser control field, comprise control module, the operation display unit be connected respectively with control module, water circulating pump variable valve, level control valve, air ejector variable valve, thermal de-aeration variable valve, solidifying water temperature sensor, Inlet Temperature of Circulating Water sensor and steam flow sensor; Four variable valve are all connected with operation display unit; Operation display unit is also connected to pressure transducer and level sensor; Operation display unit shows two sensing datas, to four variable valve transmit operation signals, and sends manual/auto signal and the sensing data of variable valve to control module; Control module receives the valve position feedback signal of data and four variable valve, and the variable valve simultaneously to correspondence sends valve position control signal.The present invention is directed to the automatic adaptive functions that different control model has condenser control strategy, improve the reliance security of marine condenser Process Control System.
Description
Technical field
The present invention relates to marine condenser control field, is specifically a kind of self-adaptation marine condenser Process Control System and its implementation.
Background technology
Marine condenser, as low-temperature receiver, is the visual plant ensureing Steam Power Equipment stable operation.When chiller control system breaks down, will the normal operation of condenser be had influence on, and then affect the operation of main auxiliary machine peculiar to vessel, reduce operational efficiency, even directly affect the security that Ship steam power plant runs.
Marine condenser Process Control System mainly comprises condenser pressure control system, Water in Condenser level controlling system and condenser condensate supercool degree control system three parts, is referred to as condenser Process Control System.Marine condenser control pressurer system Main Function is the vacuum maintaining condenser, ensures the normal steam discharge of main auxiliary machine.It is setting range that marine condenser water level control system mainly controls condenser water level, prevents that water level is too high or too low affects condenser heat-exchange pipes heat exchange efficiency.The degree of supercooling of solidifying water mainly controls in specialized range by condensate supercool degree controlling functions peculiar to vessel, reduces solidifying water oxygen level, avoids rich oxygen content to coagulate the equipment such as aqueous corrosion boiler.
What usual marine condenser control pressurer system adopted is the scheme directly being controlled condenser pressure by controlled circulation pump rotary speed, and the shortcoming of the program is poor to the failure condition adaptive faculty of control system sensor, variable valve etc.Marine condenser ordinary water level control method mainly regulates condenser water level by T-valve aperture, and shortcoming is under boats and ships significantly variable working condition condition, causes controlling stabilization time longer, and poor to control system failure condition adaptive faculty.Steam is mainly incorporated into condenser internal heat trap by thermal de-aeration valve by condensate supercool degree control program peculiar to vessel, play the object reducing condensate supercool degree, shortcoming is that control effects is undesirable in underload situation, and poor to control system failure condition adaptive faculty.Further, marine condenser Process Control System control model conventional is at present comparatively single, control system can only be removed automatically, could again drop into automatically after fixing a breakdown after there is control system fault.Have impact on the normal operation of Ship steam power plant.
Summary of the invention
For the defect existed in prior art, the object of the present invention is to provide a kind of self-adaptation marine condenser Process Control System and its implementation, this system has condenser pressure controlling functions, condenser ordinary water level controlling functions and condensate supercool degree controlling functions, and various control pattern; Can automatically identify that there are for different control model the automatic adaptive functions of condenser control strategy to the fault of pressure transducer, level sensor, variable valve actuator etc., improve the reliance security of marine condenser Process Control System.
For reaching above object, the invention provides a kind of self-adaptation marine condenser Process Control System, comprise control module, the operation display unit be connected respectively with control module, water circulating pump variable valve, level control valve, air ejector variable valve, thermal de-aeration variable valve, solidifying water temperature sensor, Inlet Temperature of Circulating Water sensor and steam flow sensor; Described water circulating pump variable valve, level control valve, air ejector variable valve, thermal de-aeration variable valve are also all connected with operation display unit; Described operation display unit also connects the pressure transducer of a condenser and the level sensor of a condenser respectively; The data of described operation display unit display pressure transducer and level sensor, to water circulating pump variable valve, level control valve, air ejector variable valve, thermal de-aeration variable valve transmit operation signal, send the manual/auto signal of described each variable valve and the data of each sensor to control module simultaneously; Described control module receives the data that solidifying water temperature sensor, Inlet Temperature of Circulating Water sensor and steam flow sensor transmit, receive the valve position feedback signal to water circulating pump variable valve, level control valve, air ejector variable valve, thermal de-aeration variable valve, the variable valve simultaneously to correspondence sends valve position control signal.
On the basis of technique scheme, described control module comprises collecting unit, display unit, analytic unit, pressure pattern selection unit, water level mode selecting unit, degree of supercooling mode selecting unit, computing unit and output unit, collecting unit connects all parts be connected with control module, and the data collected are shown by display unit, analytic unit is connected with collecting unit, by receiving the failure condition of each parts of its signal analysis, pressure pattern selection unit, water level mode selecting unit, degree of supercooling mode selecting unit is linking parsing unit and computing unit respectively, described three mode selecting unit extract according to the combination of failure condition, adaptively selected control model, and transfer to computing unit, computing unit calculates control of valve position amount and passes through coupled output unit, control of valve position signal is exported to corresponding variable valve.
On the basis of technique scheme, described operation display unit comprises operating unit, pressure display unit and water level display unit, pressure display unit Bonding pressure sensor, and shows its data; Water level display unit connects level sensor, and shows its data; Operating unit connects water circulating pump variable valve, level control valve, air ejector variable valve, thermal de-aeration variable valve, and to described four variable valve transmit operation signals, the collecting unit of operating unit also in connection control unit, is sent to collecting unit jointly by operation signal and data.
On the basis of technique scheme, these four variable valve of described water circulating pump variable valve, level control valve, air ejector variable valve and thermal de-aeration variable valve include remote control unit, driver element and valve position feedback unit, each remote control unit is all connected with the operating unit in operation display unit, receives the operation signal that operating unit is sent; Each valve position feedback unit is all connected with the collecting unit of control module, sends valve position feedback signal to collecting unit; Each driver element is all connected with the output unit in control module, receives the control of valve position signal that output unit transmits.
The present invention also proposes a kind of implementation method of self-adaptation marine condenser Process Control System, comprises the steps: S1. system electrification and initialization, arranges various variable and interface, and control module gathers the various signals that it receives, and shows; S2. control module judges whether the regulative mode of water circulating pump variable valve, level control valve and thermal de-aeration variable valve is thrown automatically, if so, enters S4 respectively; If not, S5 is entered; S3. control module carries out combination extraction to failure condition, selects the control model corresponding with described regulative mode; Described failure condition comprises condenser pressure failure condition, condenser water level failure condition, condensate supercool degree failure condition; Described control model comprise condenser pressure control, Output pressure locking control, condenser ordinary water level control, become weights feedforward water lev el control, water level export locking control, condensate supercool degree control, thermal de-aeration export locking control and thermal de-aeration variable valve standard-sized sheet control; S4. the control model after selection calculates by control module, result is exported respectively to the water circulating pump variable valve, air ejector variable valve, level control valve or the thermal de-aeration variable valve that need to control, proceeds to S2; S5. operating personnel carry out remote manual operation by operation display unit to not throwing automatic variable valve, proceed to S2.
On the basis of technique scheme, described condenser pressure failure condition comprises pressure sensor failure, water circulating pump variable valve fault; Condenser water level failure condition comprises level sensor fault, steam flow change is greater than full operating mode 10%, level control valve fault; Condensate supercool degree failure condition comprise solidifying water temperature sensor fault, steam flow lower than full operating mode 20%, thermal de-aeration variable valve fault.
On the basis of technique scheme, described ebullator variable valve is thrown automatically, and the detailed step of single control procedure is: B1. ebullator variable valve is thrown automatically, and now air ejector variable valve must be thrown automatically; B2. control module analyzes pressure sensor data, determines whether pressure sensor failure, if so, enters B6; If not, B3 is entered; B3. adopt the pressure signal that collects of pressure transducer as controlled volume; B4. control module selects control model to be that condenser pressure controls; B5. control module determines whether water circulating pump variable valve fault, if so, enters B6; If not, B7 is entered; B6. control module selects control model to be that Output pressure locking controls; B7. the water circulating pump variable valve under the selected control model of control module calculating exports valve position, and the control of valve position signal being converted to electric current driving is sent to water circulating pump variable valve.
On the basis of technique scheme, described level control valve is thrown automatically, and the detailed step of single control procedure is: C1. level control valve is thrown automatically; C2. control module analyzes level sensor data, determines whether level sensor fault, if so, enters C8; If not, C3 is entered; C3. adopt the water level signal that collects of level sensor as controlled volume; C4. control module is to steam flow sensor data analysis, judges whether that steam flow change is greater than 10% of full operating mode, if so, enters C6; If not, C5 is entered; C5. control module selects control model to be that condenser ordinary water level controls; C6. control module selects control model for becoming weights feedforward water lev el control; C7. control module judges whether level control valve fault occurs, and if so, enters C8; If not, C9 is entered; C8. control module selects control model to be that water level exports locking control; C9. the water level under the selected control model of control module calculating exports valve position, and the control of valve position signal being converted to electric current driving is sent to level control valve.
On the basis of technique scheme, described thermal de-aeration variable valve is thrown automatically, and the detailed step of single control procedure is: D1. thermal de-aeration variable valve is thrown automatically; D2. control module is to solidifying water temperature sensor data analysis, determines whether solidifying water temperature sensor fault, if so, enters D8; If not, D3 is entered; D3. condensate supercool degree is obtained, using this condensate supercool degree as controlled volume by this solidifying water temperature sensor numerical evaluation; D4. control module is to steam flow data analysis, judges whether that steam flow is lower than 20% of full operating mode, if so, enters D6; If not, D5 is entered; D5. control module selects control model to be that condensate supercool degree controls; D6. control module selects control model to be that thermal de-aeration valve standard-sized sheet controls; D7. control module judges whether that the development of heat removes oxygen valve fault, if so, enters D8; If not, D9 is entered; D8. control module selects control model to be that thermal de-aeration exports locking; D9. the degree of supercooling under the selected control model of control module calculating exports valve position, and the control of valve position signal being converted to electric current driving is sent to thermal de-aeration variable valve.
On the basis of technique scheme, condenser pressure controls to refer to, obtain the circulating water flow at this operating mode, this temperature according to temperature in and steam load by theory calculate or practical operating experiences, then regulate the corresponding relation between threshold values to obtain the working control aperture of valve by this circulating water flow and water circulating pump; Described Output pressure locking control refers to, the normal control output valve before breaking down is exported to water circulating pump variable valve, and remains unchanged, produce alerting signal simultaneously.
On the basis of technique scheme, condenser ordinary water level controls to refer to, controls condenser water level in setting range by regulating level control valve; Become weights feedforward water lev el control to refer to, condenser water level is controlled by regulating level control valve, simultaneously according to steam flow parameter as feed-forward signal, when steam flow change is greater than 10% of full operating mode, namely during variable working condition on a large scale, controlling water level variable valve action in advance, by the water lev el control of condenser in setting range; Water lev el control exports locking control and refers to, the normal control output valve before breaking down is exported to level control valve, and remains unchanged, produce alerting signal simultaneously.
On the basis of technique scheme, condensate supercool degree controls to refer to, by regulating thermal de-aeration variable valve to improve solidifying coolant-temperature gage, makes condensate supercool degree control in setting range; Thermal de-aeration variable valve standard-sized sheet controls to refer to, at steam flow lower than 20% of full operating mode, namely during the low operating mode of steam load, directly thermal de-aeration variable valve is reached maximum opening, not controlling, making condensate supercool degree control in setting range by coagulating coolant-temperature gage; Thermal de-aeration exports locking and controls, and refers to and the normal control output valve before breaking down is exported to thermal de-aeration variable valve, and remain unchanged, produce alerting signal simultaneously.
On the basis of technique scheme, described control module comprises collecting unit, analytic unit, pressure pattern selection unit, water level mode selecting unit, degree of supercooling mode selecting unit, computing unit and output unit, and collecting unit judges whether described variable valve is thrown automatically; Analytic unit is analyzed described fault; Pressure pattern selection unit, water level mode selecting unit and degree of supercooling mode selecting unit are selected control model; Computing unit calculates every numerical value, and output unit, by the result of calculation of computing unit, is converted to the control of valve position signal of electric current driving and exports.
On the basis of technique scheme, described condenser pressure controls, Output pressure locking control is stored in pressure pattern selection unit; Condenser ordinary water level controls, change weights feedforward water lev el control, water level export locking control and be stored in water level mode selecting unit; Condensate supercool degree controls, thermal de-aeration exports locking control, thermal de-aeration variable valve standard-sized sheet controls to be stored in degree of supercooling mode selecting unit.
Beneficial effect of the present invention is:
1. the present invention can adapt to automatically to the pressure sensor failure of condenser, when pressure sensor failure, is locked by Output pressure, keeps the stable operation of condenser pressure control system to greatest extent.
2. the present invention can adapt to automatically to the level sensor fault of condenser, when level sensor fault, water level is exported locking, under Ship steam power plant is in variable working condition condition on a large scale, condenser Process Control System will switch control model for becoming weights feedforward water lev el control, to reduce control disturbance.
3. the present invention can adapt to automatically to solidifying water temperature sensor fault, when solidifying water temperature sensor fault, thermal de-aeration is exported locking; When running under being in running on the lower load, switching control model is that thermal de-aeration valve standard-sized sheet controls by condenser Process Control System, ensures the control stiffness under running on the lower load.
4. the present invention can adapt to automatically to water circulating pump variable valve, level control valve, thermal de-aeration variable valve fault, and after each variable valve breaks down, control system can lock immediately and control to export, and ensures the safety of condenser Process Control System.
Accompanying drawing explanation
Fig. 1 is the signal flow graph of embodiment of the present invention self-adaptation marine condenser Process Control System structure;
Fig. 2 is signal flow graph detailed in Fig. 1;
Fig. 3 is the implementation method process flow diagram of embodiment of the present invention self-adaptation marine condenser Process Control System;
Fig. 4 is the detail flowchart that in Fig. 3, single control procedure automatically thrown by ebullator variable valve;
Fig. 5 is the detail flowchart that single control procedure automatically thrown by Fig. 3 middle water level variable valve;
Fig. 6 is the detail flowchart that in Fig. 3, single control procedure automatically thrown by thermal de-aeration variable valve.
Reference numeral:
Water circulating pump variable valve 1, first remote control unit 11, first driver element 12, first valve position feedback unit 13;
Level control valve 2, the second remote control unit 21, second driver element 22, second valve position feedback unit 23;
Air ejector variable valve the 3, three remote control unit the 31, three driver element the 32, three valve position feedback unit 33;
Thermal de-aeration variable valve the 4, four remote control unit 41, four-wheel drive unit 42, the 4th valve position feedback unit 43;
Operation display unit 5, operating unit 51, pressure display unit 52, water level display unit 53;
Control module 6, collecting unit 61, display unit 62, analytic unit 63, pressure pattern selection unit 64, water level mode selecting unit 65, degree of supercooling mode selecting unit 66, computing unit 67, output unit 68;
Pressure transducer 7; Level sensor 8; Solidifying water temperature sensor 9; Inlet Temperature of Circulating Water sensor 10; Steam flow sensor 11.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in further detail.
As shown in Figure 1, self-adaptation marine condenser Process Control System of the present invention, comprise control module 6, the operation display unit 5 be connected respectively with control module 6, water circulating pump variable valve 1, level control valve 2, air ejector variable valve 3, thermal de-aeration variable valve 4, solidifying water temperature sensor 9, Inlet Temperature of Circulating Water sensor 10 and steam flow sensor 11; Described water circulating pump variable valve 1, level control valve 2, air ejector variable valve 3, thermal de-aeration variable valve 4 are also all connected with operation display unit 5; Operation display unit 5 also connects the pressure transducer 7 of a condenser and the level sensor 8 of a condenser respectively, and wherein, described air ejector variable valve 3 is admission variable valve of air ejector; Water circulating pump variable valve 1 is the admission variable valve of water circulating pump.Operation display unit 5 shows the data of pressure transducer 7 and level sensor 8, to water circulating pump variable valve 1, level control valve 2, air ejector variable valve 3, thermal de-aeration variable valve 4 transmit operation signal, send the manual/auto signal of described each variable valve and the data of each sensor to control module 6 simultaneously; Control module 6 receives the data that solidifying water temperature sensor 9, Inlet Temperature of Circulating Water sensor 10 and steam flow sensor 11 transmit, receive the valve position feedback signal to water circulating pump variable valve 1, level control valve 2, air ejector variable valve 3, thermal de-aeration variable valve 4, send valve position control signal to described each variable valve simultaneously.Described control of valve position signal, valve position feedback signal, operation signal are 4mA-20mA standard current signal.
As depicted in figs. 1 and 2, operation display unit 5 comprises operating unit 51, pressure display unit 52 and water level display unit 53, and pressure display unit 52 Bonding pressure sensor 7 also shows its data; Water level display unit 53 connects level sensor 8 and shows its data.Operating unit 51 connects water circulating pump variable valve 1, level control valve 2, air ejector variable valve 3, thermal de-aeration variable valve 4, and to described four variable valve transmit operation signals, operating unit is connection control unit 6 also, and to its transmit operation signal and data.
Described control module 6 comprises collecting unit 61, display unit 62, analytic unit 63, pressure pattern selection unit 64, water level mode selecting unit 65, degree of supercooling mode selecting unit 66, computing unit 67 and output unit 68, collecting unit 61 connects all parts be connected with control module, and shown the data collected by display unit 62, collecting unit 61 attended operation simultaneously unit 51.Analytic unit 63 is connected with collecting unit 62, by receiving the failure condition of each parts of its signal analysis, pressure pattern selection unit 64, water level mode selecting unit 65, degree of supercooling mode selecting unit 66 is linking parsing unit 67 and computing unit 68 respectively, described three mode selecting unit extract according to the combination of failure condition, adaptively selected control model, and transfer to computing unit 67, computing unit 67 calculates control of valve position amount and by coupled output unit 68, result of calculation is transferred to control of valve position signal and exports corresponding variable valve to by output unit 68.
Described water circulating pump variable valve 1 comprises the first remote control unit 11, first driver element 12, first valve position feedback unit 13; Level control valve 2 comprises the second remote control unit 21, second driver element 22, second valve position feedback unit 23; Air ejector variable valve 3 comprises the 3rd remote control unit 31, the 3rd driver element 32, the 3rd valve position feedback unit 33; Thermal de-aeration variable valve 4 comprises the 4th remote control unit 41, four-wheel drive unit 42, the 4th valve position feedback unit 43.Above-mentioned each remote control unit is all connected with the operating unit 51 in operation display unit 5, receives the operation signal that operating unit 51 is sent; Each valve position feedback unit is all connected with the collecting unit 61 of control module 6, sends valve position feedback signal to collecting unit 61; Each driver element is all connected with the output unit 68 in control module 6, receives the control of valve position signal that output unit 68 transmits.
As shown in figures 1 and 3, the implementation method of self-adaptation marine condenser Process Control System of the present invention, comprises the steps:
S1. system electrification initialization, arrange various variable and interface, control module 6 gathers the various signals that it receives, and shows.
S2. the collecting unit 61 of control module 6 judges whether the regulative mode of water circulating pump variable valve, level control valve and thermal de-aeration variable valve is thrown automatically, if so, enters S4 respectively; If not, S5 is entered;
S3. analytic unit 63 pairs of failure conditions of control module 6 carry out combination extraction, and pressure pattern selection unit 64, water level mode selecting unit 65 and degree of supercooling mode selecting unit 66 select the control model corresponding with described regulative mode respectively.Described failure condition comprises condenser pressure failure condition, condenser water level failure condition, condensate supercool degree failure condition; Condenser pressure failure condition comprises again pressure sensor failure, water circulating pump variable valve fault; Condenser water level failure condition comprises again level sensor fault, steam flow change is greater than full operating mode 10%, level control valve fault; Condensate supercool degree failure condition comprise again solidifying water temperature sensor fault, steam flow lower than full operating mode 20%, thermal de-aeration variable valve fault.Control model comprise condenser pressure control, Output pressure locking control, condenser ordinary water level control, become weights feedforward water lev el control, water level export locking control, condensate supercool degree control, thermal de-aeration export locking control and thermal de-aeration variable valve standard-sized sheet control.
S4. the control model after selection calculates by control module, result is exported respectively to the water circulating pump variable valve 1, air ejector variable valve 2, level control valve 3 or the thermal de-aeration variable valve 4 that need to control, proceeds to S2.
S5. operating personnel carry out remote manual operation by operation display unit to not throwing automatic variable valve, proceed to S2.
As shown in Figure 1, Figure 2 and Figure 4, after system starts also initialization, if judge that ebullator variable valve 1 is thrown automatically, the detailed step of single control procedure is:
B1. the collecting unit 61 of control module 6 judges that ebullator variable valve 1 is thrown automatically, and now air ejector variable valve 3 must be thrown automatically, and only under the two throws automatic situation jointly, this time control procedure could be set up.
B2. analytic unit 63 analyzes pressure transducer 7 data, determines whether pressure sensor failure, if so, enters B6; If not, B3 is entered.
B3. analytic unit 63 adopt pressure transducer 7 to collect pressure signal as controlled volume.
B4. the pressure pattern selection unit 64 of control module 6 selects control model to be that condenser pressure controls; Condenser pressure controls to refer to, obtain the circulating water flow at this operating mode, this temperature according to temperature in and steam load by theory calculate or practical operating experiences, then regulate the corresponding relation between threshold values to obtain the working control aperture of valve by this circulating water flow and water circulating pump.
B5. analytic unit 63 is by the valve position feedback signal of the first valve position feedback unit 13 transmission, determines whether water circulating pump variable valve fault, if so, enters B6; If not, B7 is entered.
B6. pressure pattern selection unit 64 control module selects control model to be that Output pressure locking controls; Output pressure locking control refers to, the normal control output valve before breaking down is exported to the first driver element 12 of water circulating pump variable valve 1, and remains unchanged, produce alerting signal simultaneously.
B7. computing unit 67 controls according to condenser pressure or Output pressure locking control, computation cycles testing pump valve controls to export valve position, result of calculation is converted to the control of valve position signal that electric current drives by output unit 68, is sent to the first driver element 12 of water circulating pump variable valve 1.
As shown in Figure 1, Figure 2 with shown in Fig. 5, system starts and after initialization, if judge that level control valve 2 is thrown automatically, the detailed step of single control procedure is:
C1. the collecting unit 61 of control module 6 judges that level control valve is thrown automatically.
C2. analytic unit 63 analyzes level sensor 8 data, determines whether level sensor fault, if so, enters C8; If not, C3 is entered;
C3. analytic unit 63 adopt level sensor 8 to collect water level signal as controlled volume.
C4. water level mode selecting unit 65 pairs of steam flow sensor 11 data analysis of control module 6, judge whether that steam flow change is greater than 10% of full operating mode, if so, enter C6; If not, C5 is entered.
C5. water level mode selecting unit 65 selects control model to be that condenser ordinary water level controls; Condenser ordinary water level controls to refer to, controls condenser water level in setting range by regulating level control valve 2.
C6. water level mode selecting unit 65 selects control model to be become weights feedforward water lev el control; Become weights feedforward water lev el control to refer to, condenser water level is controlled by regulating level control valve 2, simultaneously according to steam flow parameter as feed-forward signal, when steam flow change is greater than 10% of full operating mode, namely during variable working condition on a large scale, controlling water level variable valve 2 action in advance, by the water lev el control of condenser in setting range.
C7. analytic unit 63 is by the valve position feedback signal of the second valve position feedback unit 23 transmission, judges whether level control valve fault occurs, if so, enters C8; If not, C9 is entered.
C8. water level mode selecting unit 65 selects control model to be that water level exports locking control; Water lev el control exports locking control and refers to, the normal control output valve before breaking down is exported to the second driver element 22 of level control valve 2, and remains unchanged, produce alerting signal simultaneously.
C9. the water level that computing unit 67 calculates under selected control model exports valve position, and result of calculation is converted to the control of valve position signal that electric current drives by output unit 68, is sent to the second driver element 22 of level control valve 2.
Shown in Fig. 1, Fig. 2 and Fig. 6, system starts and after initialization, if judge that thermal de-aeration variable valve 4 is thrown automatically, the detailed step of single control procedure is:
D1. the collecting unit 61 of control module 6 judges that thermal de-aeration variable valve is thrown automatically.
D2. analytic unit 63 is to solidifying water temperature sensor 9 data analysis, determines whether solidifying water temperature sensor fault, if so, enters D8; If not, D3 is entered.
D3. analytic unit 63 obtains condensate supercool degree, using this condensate supercool degree as controlled volume by this solidifying water temperature sensor numerical evaluation.
D4. analytic unit 63 pairs of steam flow data analysis, judge whether that steam flow is lower than 20% of full operating mode, if so, enters D6; If not, D5 is entered.
D5. the degree of supercooling mode selecting unit 66 of control module 6 selects control model to be that condensate supercool degree controls; Condensate supercool degree controls to refer to, by regulating thermal de-aeration variable valve 4 to improve solidifying coolant-temperature gage, condensate supercool degree is controlled in setting range.
D6. degree of supercooling mode selecting unit 66 selects control model to be that thermal de-aeration valve standard-sized sheet controls; Thermal de-aeration variable valve standard-sized sheet controls to refer to, at steam flow lower than 20% of full operating mode, namely during the low operating mode of steam load, directly thermal de-aeration variable valve 4 is reached maximum opening, does not control, condensate supercool degree is controlled in setting range by coagulating coolant-temperature gage.
D7. analytic unit 63 judges whether that the development of heat removes oxygen valve fault, if so, enters D8; If not, D9 is entered.
D8. degree of supercooling mode selecting unit 66 selects control model to be that thermal de-aeration exports locking; Thermal de-aeration exports locking and controls, and refers to the four-wheel drive unit 42 normal control output valve before breaking down being exported to thermal de-aeration variable valve 4, and remains unchanged, produce alerting signal simultaneously.
D9. computing unit 67 degree of supercooling calculated under selected control model controls to export valve position, and result of calculation is converted to the control of valve position signal that electric current drives by output unit 68, is sent to the four-wheel drive unit 42 of thermal de-aeration variable valve 4.
In above-mentioned steps, after the S2 to S5 that all single control procedures are equivalent to single completes, all need to jump to the judgement carrying out control procedure next time in S2.Described condenser pressure controls, Output pressure locking control is stored in pressure pattern selection unit 64; Condenser ordinary water level controls, change weights feedforward water lev el control, water level export locking control and be stored in water level mode selecting unit 65; Condensate supercool degree controls, thermal de-aeration exports locking control, thermal de-aeration variable valve standard-sized sheet controls to be stored in degree of supercooling mode selecting unit 66.
As shown in Figures 1 to 6, by a specific embodiment, the present invention is further described.
Self-adaptation marine condenser Process Control System after operation, first carries out parameter initialization, is thrown by each valve in condenser Process Control System and automatically runs.Collecting unit 61 collects the parameter such as condenser pressure, water level, solidifying coolant-temperature gage, Inlet Temperature of Circulating Water, steam flow, and water circulating pump variable valve 1, level control valve 2, air ejector variable valve 3, thermal de-aeration variable valve 4 valve position feedback signal, determine that control system does not have fault.Now pass through theory calculate or practical operating experiences according to steam load, determine the aperture of air ejector variable valve 3 under different steam load; Under condenser pressure control system will obtain this operating mode, this temperature according to Inlet Temperature of Circulating Water and steam load by theory calculate or practical operating experiences, the flow of recirculated water, regulate the corresponding relation between threshold values by this circulating water flow and water circulating pump again, obtain the working control aperture of steamer water circulating pump variable valve.
Water in Condenser level controlling system will adopt level sensor 8 data as controlled volume, by normal water lev el control mode, water level is controlled, when finding that steam load significantly changes, employing is become weights feedforward water lev el control mode, adopt steam flow as feedforward amount, to reduce water-level fluctuation during significantly variable working condition, improve water level dynamic characteristics.Employing is coagulated water temperature sensor 9 numerical value by calculating condensate supercool degree by condensate supercool degree control system, using this degree of supercooling as controlled volume, adopt conventional condensate supercool degree control mode, by controlling thermal de-aeration variable valve 4 aperture, control the exhaust steam amount entering condenser, indirectly control condensate supercool degree.When judging that steam load is in underload, be thermal de-aeration valve standard-sized sheet control mode by change control model, reason is that it is more that circulating water flow exceedes demand volume when underload, and therefore increasing exhaust steam flow, is best control method.
After analytic unit 63 detects pressure sensor failure, pressure pattern selection unit 64 will export locking according to this fault mode selection pressure and control, to adapt to this fault mode.After analytic unit 63 detects level sensor fault, water level mode selecting unit 65 will select water level to export locking control, to adapt to this fault mode according to this fault mode.After analytic unit 63 detects solidifying water temperature sensor fault, degree of supercooling mode selecting unit 66 will select thermal de-aeration to export locking control, to adapt to this fault mode according to this fault mode.
When analytic unit 63 detects that self-circulating water pump control valve 1, level control valve 2, air ejector variable valve 3, thermal de-aeration variable valve 4 break down, pressure pattern selection unit 64, water level mode selecting unit 65 and degree of supercooling mode selecting unit 66 will export according to the selection pressure output locking control respectively of this fault mode, water level output locking control and thermal de-aeration valve and lock control, to adapt to described fault mode respectively.
Therefore known, self-adaptation marine condenser Process Control System of the present invention, all has reasonable adaptive ability to various sensor fault and variable valve fault, can keep the normal work of marine condenser Process Control System to greatest extent.
The present invention is not limited to above-mentioned embodiment, and for those skilled in the art, under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications are also considered as within protection scope of the present invention.The content be not described in detail in this instructions belongs to the known prior art of professional and technical personnel in the field.
Claims (13)
1. a self-adaptation marine condenser Process Control System, it is characterized in that: comprise control module, the operation display unit be connected respectively with control module, water circulating pump variable valve, level control valve, air ejector variable valve, thermal de-aeration variable valve, solidifying water temperature sensor, Inlet Temperature of Circulating Water sensor and steam flow sensor, described water circulating pump variable valve, level control valve, air ejector variable valve, thermal de-aeration variable valve are also all connected with operation display unit, described operation display unit also connects the pressure transducer of a condenser and the level sensor of a condenser respectively, the data of described operation display unit display pressure transducer and level sensor, to water circulating pump variable valve, level control valve, air ejector variable valve, thermal de-aeration variable valve transmit operation signal, send the data of the manual/auto signal of described each variable valve and pressure transducer, level sensor to control module simultaneously, described control module receives the data that solidifying water temperature sensor, Inlet Temperature of Circulating Water sensor and steam flow sensor transmit, receive the valve position feedback signal of water circulating pump variable valve, level control valve, air ejector variable valve, thermal de-aeration variable valve, the variable valve simultaneously to correspondence sends valve position control signal, described control module comprises collecting unit, display unit, analytic unit, pressure pattern selection unit, water level mode selecting unit, degree of supercooling mode selecting unit, computing unit and output unit, collecting unit connects all parts be connected with control module, and the data collected are shown by display unit, analytic unit is connected with collecting unit, by receiving the failure condition of each parts of its signal analysis, pressure pattern selection unit, water level mode selecting unit, degree of supercooling mode selecting unit is linking parsing unit and computing unit respectively, described three mode selecting unit extract according to the combination of failure condition, adaptively selected control model, and transfer to computing unit, computing unit calculates control of valve position amount and passes through coupled output unit, control of valve position signal is exported to corresponding variable valve.
2. self-adaptation marine condenser Process Control System as claimed in claim 1, is characterized in that: described operation display unit comprises operating unit, pressure display unit and water level display unit, pressure display unit Bonding pressure sensor, and shows its data; Water level display unit connects level sensor, and shows its data; Operating unit connects water circulating pump variable valve, level control valve, air ejector variable valve, thermal de-aeration variable valve, and to described four variable valve transmit operation signals, the collecting unit of operating unit also in connection control unit, is sent to collecting unit jointly by operation signal and data.
3. self-adaptation marine condenser Process Control System as claimed in claim 2, it is characterized in that: these four variable valve of described water circulating pump variable valve, level control valve, air ejector variable valve and thermal de-aeration variable valve include remote control unit, driver element and valve position feedback unit, each remote control unit is all connected with the operating unit in operation display unit, receives the operation signal that operating unit is sent; Each valve position feedback unit is all connected with the collecting unit of control module, sends valve position feedback signal to collecting unit; Each driver element is all connected with the output unit in control module, receives the control of valve position signal that output unit transmits.
4., based on an implementation method for self-adaptation marine condenser Process Control System in claim 1, it is characterized in that, comprise the steps:
S1. system electrification initialization, arrange various variable and interface, control module gathers the various signals that it receives, and shows;
S2. control module judges whether the regulative mode of water circulating pump variable valve, level control valve and thermal de-aeration variable valve is thrown automatically, if so, enters S3 respectively; If not, S5 is entered;
S3. control module carries out combination extraction to failure condition, selects the control model corresponding with described regulative mode; Described failure condition comprises condenser pressure failure condition, condenser water level failure condition, condensate supercool degree failure condition; Described control model comprise condenser pressure control, Output pressure locking control, condenser ordinary water level control, become weights feedforward water lev el control, water level export locking control, condensate supercool degree control, thermal de-aeration export locking control and thermal de-aeration variable valve standard-sized sheet control;
S4. the control model after selection calculates by control module, result is exported respectively to the water circulating pump variable valve, air ejector variable valve, level control valve or the thermal de-aeration variable valve that need to control, proceeds to S2;
S5. operating personnel carry out remote manual operation by operation display unit to not throwing automatic variable valve, proceed to S2.
5. the implementation method of self-adaptation marine condenser Process Control System as claimed in claim 4, is characterized in that: described condenser pressure failure condition comprises pressure sensor failure, water circulating pump variable valve fault; Condenser water level failure condition comprises level sensor fault, steam flow change is greater than full operating mode 10%, level control valve fault; Condensate supercool degree failure condition comprise solidifying water temperature sensor fault, steam flow lower than full operating mode 20%, thermal de-aeration variable valve fault.
6. the implementation method of self-adaptation marine condenser Process Control System as claimed in claim 5, is characterized in that: described water circulating pump variable valve is thrown automatically, and the detailed step of single control procedure is:
B1. water circulating pump variable valve is thrown automatically, and now air ejector variable valve must be thrown automatically;
B2. control module analyzes pressure sensor data, determines whether pressure sensor failure, if so, enters B6; If not, B3 is entered;
B3. adopt the pressure signal that collects of pressure transducer as controlled volume;
B4. control module selects control model to be that condenser pressure controls;
B5. control module determines whether water circulating pump variable valve fault, if so, enters B6; If not, B7 is entered;
B6. control module selects control model to be that Output pressure locking controls;
B7. the water circulating pump variable valve under the selected control model of control module calculating exports valve position, and the control of valve position signal being converted to electric current driving is sent to water circulating pump variable valve.
7. the implementation method of self-adaptation marine condenser Process Control System as claimed in claim 5, is characterized in that: described level control valve is thrown automatically, and the detailed step of single control procedure is:
C1. level control valve is thrown automatically;
C2. control module analyzes level sensor data, determines whether level sensor fault, if so, enters C8; If not, C3 is entered;
C3. adopt the water level signal that collects of level sensor as controlled volume;
C4. control module is to steam flow sensor data analysis, judges whether that steam flow change is greater than 10% of full operating mode, if so, enters C6; If not, C5 is entered;
C5. control module selects control model to be that condenser ordinary water level controls, and enters C7;
C6. control module selects control model for becoming weights feedforward water lev el control, enters C7;
C7. control module judges whether level control valve fault occurs, and if so, enters C8; If not, C9 is entered;
C8. control module selects control model to be that water level exports locking control;
C9. the water level under the selected control model of control module calculating exports valve position, and the control of valve position signal being converted to electric current driving is sent to level control valve.
8. the implementation method of self-adaptation marine condenser Process Control System as claimed in claim 5, is characterized in that: described thermal de-aeration variable valve is thrown automatically, and the detailed step of single control procedure is:
D1. thermal de-aeration variable valve is thrown automatically;
D2. control module is to solidifying water temperature sensor data analysis, determines whether solidifying water temperature sensor fault, if so, enters D8; If not, D3 is entered;
D3. condensate supercool degree is obtained, using this condensate supercool degree as controlled volume by this solidifying water temperature sensor numerical evaluation;
D4. control module is to steam flow data analysis, judges whether that steam flow is lower than 20% of full operating mode, if so, enters D6; If not, D5 is entered;
D5. control module selects control model to be that condensate supercool degree controls, and enters D7;
D6. control module selects control model to be that thermal de-aeration valve standard-sized sheet controls, and enters D7;
D7. control module judges whether that the development of heat removes oxygen valve fault, if so, enters D8; If not, D9 is entered;
D8. control module selects control model to be that thermal de-aeration exports locking;
D9. the degree of supercooling under the selected control model of control module calculating exports valve position, and the control of valve position signal being converted to electric current driving is sent to thermal de-aeration variable valve.
9. the implementation method of the self-adaptation marine condenser Process Control System as described in claim 4 or 6, it is characterized in that: condenser pressure controls to refer to, obtain the circulating water flow under this steam load, this Inlet Temperature of Circulating Water according to Inlet Temperature of Circulating Water and steam load by theory calculate or practical operating experiences, then regulate the corresponding relation between threshold values to obtain the working control aperture of valve by this circulating water flow and water circulating pump; Described Output pressure locking control refers to, the normal control output valve before breaking down is exported to water circulating pump variable valve, and remains unchanged, produce alerting signal simultaneously.
10. the implementation method of the self-adaptation marine condenser Process Control System as described in claim 4 or 7, is characterized in that: condenser ordinary water level controls to refer to, controls condenser water level in setting range by regulating level control valve; Become weights feedforward water lev el control to refer to, condenser water level is controlled by regulating level control valve, simultaneously according to steam flow parameter as feed-forward signal, when steam flow change is greater than 10% of full operating mode, namely during variable working condition on a large scale, controlling water level variable valve action in advance, by the water lev el control of condenser in setting range; Water lev el control exports locking control and refers to, the normal control output valve before breaking down is exported to level control valve, and remains unchanged, produce alerting signal simultaneously.
The implementation method of 11. self-adaptation marine condenser Process Control Systems as described in claim 4 or 8, it is characterized in that: condensate supercool degree controls to refer to, by regulating thermal de-aeration variable valve to improve solidifying coolant-temperature gage, condensate supercool degree is made to control in setting range; Thermal de-aeration variable valve standard-sized sheet controls to refer to, at steam flow lower than 20% of full operating mode, namely during the low operating mode of steam load, directly thermal de-aeration variable valve is reached maximum opening, not controlling, making condensate supercool degree control in setting range by coagulating coolant-temperature gage; Thermal de-aeration exports locking and controls, and refers to and the normal control output valve before breaking down is exported to thermal de-aeration variable valve, and remain unchanged, produce alerting signal simultaneously.
12. as the implementation method of the self-adaptation marine condenser Process Control System as described in arbitrary in claim 4 to 8, it is characterized in that: described control module comprises collecting unit, analytic unit, pressure pattern selection unit, water level mode selecting unit, degree of supercooling mode selecting unit, computing unit and output unit, collecting unit judges whether described variable valve is thrown automatically; Analytic unit is analyzed described fault; Pressure pattern selection unit, water level mode selecting unit and degree of supercooling mode selecting unit are selected control model; Computing unit calculates every numerical value, and output unit, by the result of calculation of computing unit, is converted to the control of valve position signal of electric current driving and exports.
The implementation method of 13. self-adaptation marine condenser Process Control Systems as claimed in claim 12, is characterized in that: described condenser pressure controls, Output pressure locking control is stored in pressure pattern selection unit; Condenser ordinary water level controls, change weights feedforward water lev el control, water level export locking control and be stored in water level mode selecting unit; Condensate supercool degree controls, thermal de-aeration exports locking control, thermal de-aeration variable valve standard-sized sheet controls to be stored in degree of supercooling mode selecting unit.
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| CN113686026B (en) * | 2020-05-19 | 2022-07-01 | 山东大学 | Loop heat pipe solar pressure pattern recognition method based on machine learning |
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| CN101702084B (en) * | 2009-04-10 | 2012-06-27 | 中国科学院金属研究所 | High-temperature and high-pressure water circulation control system and control method thereof |
| CN101769586B (en) * | 2010-02-04 | 2013-02-06 | 无锡永信能源科技有限公司 | Cold (warm) water circulation energy efficiency control method for central air-conditioning system |
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