CN103557081A - Lightweight gas turbine control system - Google Patents
Lightweight gas turbine control system Download PDFInfo
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- CN103557081A CN103557081A CN201310581728.3A CN201310581728A CN103557081A CN 103557081 A CN103557081 A CN 103557081A CN 201310581728 A CN201310581728 A CN 201310581728A CN 103557081 A CN103557081 A CN 103557081A
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Abstract
The invention discloses a lightweight gas turbine control system which comprises a circuit triply-redundant integrated control system, wherein an output signal of a triple circuit passes through a two-out-of-three voting chip before the output signal becomes system output; when one of the three circuits fails, a false signal is output and is shielded through the two-out-of-three voting chip, and an accurate signal is output. The lightweight gas turbine control system also comprises the following functional units: a controller hardware unit, a switching value input unit, a switching value output unit, an analog quantity input unit, an analog quantity output unit, a data processing unit, an alarm protection unit, a sequential control unit and a fuel control unit. The operating stability and reliability of a gas turbine are realized, the time of debugging the gas turbine is greatly reduced, and accordingly, the commissioning activities cost generated is reduced. The operating control of the total processes of starting, accelerating and stably operating of the gas turbine is realized, and control, adjustment, monitoring, protection and the like in a gas turbine operating process are realized.
Description
Technical field
The present invention relates to Gas Turbine Control Technique field, is a kind of lightweight gas turbine control system specifically.
Technical background
Gas turbine control system is the bridge between people and gas-turbine plant, is also the headquarter that whole unit operation is controlled.Gas turbine can be realized safely and steadily running depends on a set of perfect control system enforcement control.Thereby the control system of gas turbine is very crucial.
Summary of the invention
The object of the invention is to realize the control of gas turbine from startup, igniting, raising speed to the overall process safety and stability of rated condition.
For realizing the technological scheme of object employing of the present invention, be:
A control system, comprises circuit triplex level redundancy complex control system, and each part of triple modular redundant is independently, but the function of three parts is identical; The output signal of triple modular redundant circuit, before becoming system output, is got two voting chip through one three; The raw fault that has in three circuit that riches all the way, output error signal, gets two votings through three and masks error signal, still exports correct signal (voltage, electric current or on off state);
Also comprise following functional unit, controller hardware unit (HDW), switching value input unit (DIU), switch amount output unit (DOU), analog input unit (AIU), analog output unit (AOU), data processing unit (DPU), alarm and protection unit (APU), sequence control unit (SCU), fuel control unit (FCU);
1) controller hardware unit (HDW);
For system fault diagnosis, start-stop SOE record;
2) switching value input unit (DIU);
For the input of switching value physics is transformed into discrete type internal storage data, complete the processing of part input signal values simultaneously;
3) switch amount output unit (DOU);
For the discrete data of the switching value output calculating is transformed into the output of switching value physics;
4) analog input processing unit (AIU);
For AI module is calculated to the engineering value of relevant parameter to each analog quantity parameter by the rear resulting integer data pro rata of mould/number (A/D) conversion, and judge whether the sensor of this parameter and circuit break down, if the fault of existence, corresponding Reflector is set, pass to alarm and protection unit, and when this supplemental characteristic of the cell refernces such as data processing, carry out special processing, and improve system survivability, avoid as far as possible so cause gas turbine and shut down even emergency shutdown;
5) analog output unit (AOU);
For the analog output data that calculate (engineering value) being transformed into the integer data that can be used for D/A conversion output;
6) data processing unit (DPU);
Be used for carrying out various project data calculating, as the mean value of multipoint data, Gao Xuan, low choosing, digital filtering and conversion rotating speed, rotating speed acceleration, gas turbine performance are calculated;
7) alarm and protection unit (APU);
Processing for analog amount off-limit alarm, protection and alarm and protection locking, reset, voice guard noise reduction etc., and form alarm and protection signal, by global variable, pass to sequence control unit, gather with the alarm and protection signal producing in sequence control unit, and finally carry out alarm and protection action;
8) sequence control unit (SCU);
Be used for gas turbine from starting is prepared, to starting successfully, until the overall process of stopping, by reading the various Output rusults of field equipment state feedback data and said two units, the logical operation of passing through, analysis, to gas turbine all by the ON/OFF of control object, rise/stop logic in accordance with regulations and implement effectively to control;
9) fuel control unit (FCU);
The fuel flow rate that gas turbine mainly enters gas-turbine combustion chamber by control changes the operating conditions of gas turbine; Fuel control unit is the fuel duty of control inputs gas turbine rationally.
Advantage of the present invention:
1, the present invention has realized operation stability and the reliability of gas turbine, has greatly reduced the time of gas turbine debugging, has reduced therefore and the test run expense producing.
2, the invention solves gas turbine and control to the operation of stable operation process all processes from startup, raising speed, realized control, adjusting, supervision and protection etc. in gas turbine operation process.
3, the present invention has reliability, Security and the high availability of height, makes gas turbine and the device can optimum management and control, and safety is guaranteed.
Accompanying drawing explanation
Fig. 1 is schematic diagram of the present invention.
Fig. 2 is minimum value selector schematic diagram of the present invention.
Embodiment
1,2 further illustrate the embodiment of the present invention by reference to the accompanying drawings.
A control system, comprises circuit triplex level redundancy complex control system, and each part of triple modular redundant is independently, but the function of three parts is identical; The output signal of triple modular redundant circuit, before becoming system output, is got two voting chip through one three; The raw fault that has in three circuit that riches all the way, output error signal, gets two votings through three and masks error signal, still exports correct signal (voltage, electric current or on off state);
Also comprise following functional unit, controller hardware unit (HDW), switching value input unit (DIU), switch amount output unit (DOU), analog input unit (AIU), analog output unit (AOU), data processing unit (DPU), alarm and protection unit (APU), sequence control unit (SCU), fuel control unit (FCU);
1) controller hardware unit (HDW);
For system fault diagnosis, start-stop SOE record;
2) switching value input unit (DIU);
For the input of switching value physics is transformed into discrete type internal storage data, complete the processing of part input signal values simultaneously;
3) switch amount output unit (DOU);
For the discrete data of the switching value output calculating is transformed into the output of switching value physics;
4) analog input processing unit (AIU);
For AI module is calculated to the engineering value of relevant parameter to each analog quantity parameter by the rear resulting integer data pro rata of mould/number (A/D) conversion, and judge whether the sensor of this parameter and circuit break down, if the fault of existence, corresponding Reflector is set, pass to alarm and protection unit, and when this supplemental characteristic of the cell refernces such as data processing, carry out special processing, and improve system survivability, avoid as far as possible so cause gas turbine and shut down even emergency shutdown;
5) analog output unit (AOU);
For the analog output data that calculate (engineering value) being transformed into the integer data that can be used for D/A conversion output;
6) data processing unit (DPU);
Be used for carrying out various project data calculating, as the mean value of multipoint data, Gao Xuan, low choosing, digital filtering and conversion rotating speed, rotating speed acceleration, gas turbine performance are calculated;
7) alarm and protection unit (APU);
Processing for analog amount off-limit alarm, protection and alarm and protection locking, reset, voice guard noise reduction etc., and form alarm and protection signal, by global variable, pass to sequence control unit, gather with the alarm and protection signal producing in sequence control unit, and finally carry out alarm and protection action;
8) sequence control unit (SCU);
Be used for gas turbine from starting is prepared, to starting successfully, until the overall process of stopping, by reading the various Output rusults of field equipment state feedback data and said two units, the logical operation of passing through, analysis, to gas turbine all by the ON/OFF of control object, rise/stop logic in accordance with regulations and implement effectively to control;
9) fuel control unit (FCU);
The fuel flow rate that gas turbine mainly enters gas-turbine combustion chamber by control changes the operating conditions of gas turbine; Fuel control unit is the fuel duty of control inputs gas turbine rationally.
In described fuel control unit (FCU), on fuel regulation, take minimum gate restriction mode;
Described fuel control unit (FCU) forms (see figure 2) by starting controlling unit (FSR_STRMP), rotating speed controlling unit (FSR_N1), rotating speed load controlling unit (FSR_SPL), acceleration controlling unit (FSR_ACC), temperature control loop joint (FSR_TMP), removal of load controlling unit (FSR_THR), maximum value limiting element (FSR_MAX) and eight controlling units of minimum value limiting element (FSR_MIN);
By described starting controlling unit (FSR_STRMP), rotating speed controlling unit (FSR_N1), rotating speed load controlling unit (FSR_SPL), accelerate controlling unit (FSR_ACC), temperature control loop joint (FSR_TMP), removal of load controlling unit (FSR_THR), the output value of seven controlling units of maximum value limiting element (FSR_MAX) enters minimum value selector (MIN) simultaneously, wherein in input value, minimum value person enters maximum-value selector (MAX) with the output of minimum value limiting element (FSR_MIN) simultaneously, select in two input values the higher person as the actual execution fuel control command signal (FSR) in this moment, so only have a controlling unit to have an effect in eight controlling units of synchronization.
In the starting controlling unit (FSR_STRMP) of described fuel control unit (FCU), fuel is controlled;
After gas turbine starting, the high pressure rotor of gas turbine gas generator is turned by hydraulic starting system band, after N2 >=N2_Purge, assign fuel valve is opened to ignition location instruction, after completing the blowing of stipulated time, assign firing command, after N2 >=N2_Fire, starting process fuel controlling unit output starting controlling unit (FSR_STRMP) increases fuel feed by given rule, the output of other controlling unit is all shielded by minimax value selector during this period, does not participate in fuel and controls; Wherein N2 is high pressure rotor rotating speed, N2_Purge for blowing clearly rotating speed, N2_Fire is fire speed.
In the rotating speed controlling unit (FSR_N1) of described fuel control unit (FCU), fuel is controlled;
When gas turbine enters gas generator idling rating, during N1 >=N1_Idle; Boosting velocity procedure fuel controlling unit provides corresponding fuel valve position command according to N1 rotating speed benchmark, now starting process fuel controlling unit output starting controlling unit (FSR_STRMP) keeps to be increased until fuel valve position opens 100%, thereby by minimum value selector, is blocked and exit control; When power turbine rotational speed N 3 is greater than 2500rpm rotating speed, raising speed logic improves N1 rotating speed benchmark gas turbine raising speed, otherwise gas turbine will keep gas generator idling rating; Wherein N1 is that rotational speed of lower pressure turbine rotor, N1_Idle core engine slow train rotating speed, N3 are power turbine rotating speed.
In the rotating speed load controlling unit (FSR_SPL) of described fuel control unit (FCU), fuel is controlled;
When gas turbine raising speed is to N3 >=N3_Gov and before gas turbine is grid-connected, rotating speed load controlling unit provides corresponding fuel valve position command according to N3 rotating speed benchmark by indifference mode, now boosting velocity procedure fuel controlling unit output (FSR_N1) will be carried out ratio output in the N1 benchmark of N1 benchmark control logic adjustment, for the high state of gas generator being limited by minimum value selector.After grid-connected breaker closing, rotating speed load controlling unit will switch to poor control mode.Wherein N3 is that power turbine rotating speed, N3_Gov are synchronous slow train rotating speeds.
The acceleration controlling unit (FSR_ACC) of described fuel control unit (FCU) and temperature control loop joint (FSR_TMP);
Gas turbine raising speed, synchronous and generate electricity by way of merging two or more grid systems during, Acceleration Control link (FSR_ACC) and temperature control loop joint (FSR_TMP) is monitoring the fuel gas temperature of import before the acceleration of three rotors of gas turbine and power turbine always, and by minimum value selector, the fuel gas temperature of import before the acceleration of three rotors and power turbine is limited in below controlling value.
The removal of load controlling unit (FSR_THR) of described fuel control unit (FCU);
When gas turbine under larger load suddenly from guaranteeing when (being called removal of load) that with grid disconnection gas turbine is not occurring to get back to synchronous speed excess revolutions and flame-out prerequisite.
The maximum value limiting element (FSR_MAX) of described fuel control unit (FCU) and minimum value limiting element (FSR_MIN);
Gas turbine raising speed, synchronous and generate electricity by way of merging two or more grid systems during, the significantly variation of fuel limitation amount, steady to guarantee unit operation.
Embodiment
Choose the Tricon triplex level redundancy complex control system TS3000 of triplex level redundancy fault-tolerant control system TRICONEX company.System can not exert an influence to process because of internal fault, takes minimum gate restriction mode in the core link master control system for control system, carries out fuel regulation, thereby has improved the reliability of system.
Described triplex level redundancy fault-tolerant control system is on-the-spot real-time controller by the upper connection of EPA for the active station of unit operation monitoring, the turbine control system of the completes such as the engineer station that on-line system is safeguarded (recording collecting function containing SOE), and by network or hard wired mode realize with the various systems of factory (as DCS, MIS, AGC and to time system etc.) be connected.
Described system hardware is according to the control requirement to main frame, select three 3008 main processor modules to form the primary processor of triplex level redundancy, 4329 module network communication modules, two 32 3503E switching input modules, two 32 triple modular redundant switching value output modules 3664, three triple modular redundant analog input module 3700A, 3806, one 8 triple modular redundant pulsed quantity load modules 3511 of a triple modular redundant analog output module.
According to above-mentioned thought, develop the control system of a set of safety and stability, realized the control to the safety and stability of lightweight gas turbine.
Claims (8)
1. a lightweight gas turbine control system,
Comprise circuit triplex level redundancy complex control system, each part of triple modular redundant is independently, but the function of three parts is identical; The output signal of triple modular redundant circuit, before becoming system output, is got two voting chip through one three; The raw fault that has in three circuit that riches all the way, output error signal, gets two votings through three and masks error signal, still exports correct signal; It is characterized in that:
Also comprise following functional unit, controller hardware unit (HDW), switching value input unit (DIU), switch amount output unit (DOU), analog input unit (AIU), analog output unit (AOU), data processing unit (DPU), alarm and protection unit (APU), sequence control unit (SCU), fuel control unit (FCU);
1) controller hardware unit (HDW);
For system fault diagnosis, start-stop SOE record;
2) switching value input unit (DIU);
For the input of switching value physics is transformed into discrete type internal storage data, complete the processing of part input signal values simultaneously;
3) switch amount output unit (DOU);
For the discrete data of the switching value output calculating is transformed into the output of switching value physics;
4) analog input processing unit (AIU);
For AI module is calculated to the engineering value of relevant parameter to each analog quantity parameter by the rear resulting integer data pro rata of mould/number (A/D) conversion, and judge whether the sensor of this parameter and circuit break down, if the fault of existence, corresponding Reflector is set, pass to alarm and protection unit, and when this supplemental characteristic of the cell refernces such as data processing, carry out special processing, and improve system survivability, avoid as far as possible so cause gas turbine and shut down even emergency shutdown;
5) analog output unit (AOU);
For the analog output data that calculate (engineering value) being transformed into the integer data that can be used for D/A conversion output;
6) data processing unit (DPU);
Be used for carrying out various project data calculating, as the mean value of multipoint data, Gao Xuan, low choosing, digital filtering and conversion rotating speed, rotating speed acceleration, gas turbine performance are calculated;
7) alarm and protection unit (APU);
Processing for analog amount off-limit alarm, protection and alarm and protection locking, reset, voice guard noise reduction etc., and form alarm and protection signal, by global variable, pass to sequence control unit, gather with the alarm and protection signal producing in sequence control unit, and finally carry out alarm and protection action;
8) sequence control unit (SCU);
Be used for gas turbine from starting is prepared, to starting successfully, until the overall process of stopping, by reading the various Output rusults of field equipment state feedback data and said two units, the logical operation of passing through, analysis, to gas turbine all by the ON/OFF of control object, rise/stop logic in accordance with regulations and implement effectively to control;
9) fuel control unit (FCU);
The fuel flow rate that gas turbine mainly enters gas-turbine combustion chamber by control changes the operating conditions of gas turbine; Fuel control unit is the fuel duty of control inputs gas turbine rationally.
2. lightweight gas turbine control system according to claim 1, is characterized in that:
In described fuel control unit (FCU), on fuel regulation, take minimum gate restriction mode;
Described fuel control unit (FCU) forms (see figure 3) by starting controlling unit (FSR_STRMP), rotating speed controlling unit (FSR_N1), rotating speed load controlling unit (FSR_SPL), acceleration controlling unit (FSR_ACC), temperature control loop joint (FSR_TMP), removal of load controlling unit (FSR_THR), maximum value limiting element (FSR_MAX) and eight controlling units of minimum value limiting element (FSR_MIN);
By described starting controlling unit (FSR_STRMP), rotating speed controlling unit (FSR_N1), rotating speed load controlling unit (FSR_SPL), accelerate controlling unit (FSR_ACC), temperature control loop joint (FSR_TMP), removal of load controlling unit (FSR_THR), the output value of seven controlling units of maximum value limiting element (FSR_MAX) enters minimum value selector (MIN) simultaneously, wherein in input value, minimum value person enters maximum-value selector (MAX) with the output of minimum value limiting element (FSR_MIN) simultaneously, select in two input values the higher person as the actual execution fuel control command signal (FSR) in this moment, so only have a controlling unit to have an effect in eight controlling units of synchronization.
3. lightweight gas turbine control system according to claim 1, is characterized in that:
In the starting controlling unit (FSR_STRMP) of described fuel control unit (FCU), fuel is controlled;
After gas turbine starting, the high pressure rotor of gas turbine gas generator is turned by hydraulic starting system band, after N2 >=N2_Purge, assign fuel valve is opened to ignition location instruction, after completing the blowing of stipulated time, assign firing command, after N2 >=N2_Fire, starting process fuel controlling unit output starting controlling unit (FSR_STRMP) increases fuel feed by given rule, the output of other controlling unit is all shielded by minimax value selector during this period, does not participate in fuel and controls; Wherein N2 is high pressure rotor rotating speed, N2_Purge for blowing clearly rotating speed, N2_Fire is fire speed.
4. lightweight gas turbine control system according to claim 1, is characterized in that:
In the rotating speed controlling unit (FSR_N1) of described fuel control unit (FCU), fuel is controlled;
When gas turbine enters gas generator idling rating, during N1 >=N1_Idle; Boosting velocity procedure fuel controlling unit provides corresponding fuel valve position command according to N1 rotating speed benchmark, now starting process fuel controlling unit output starting controlling unit (FSR_STRMP) continues to increase until fuel valve position opens 100%, thereby by minimum value selector, is blocked and exit control; When power turbine rotational speed N 3 is greater than 2500rpm rotating speed, raising speed logic improves N1 rotating speed benchmark gas turbine raising speed, otherwise gas turbine will keep gas generator idling rating; Wherein N1 is that rotational speed of lower pressure turbine rotor, N1_Idle core engine slow train rotating speed, N3 are power turbine rotating speed.
5. lightweight gas turbine control system according to claim 1, is characterized in that:
In the rotating speed load controlling unit (FSR_SPL) of described fuel control unit (FCU), fuel is controlled;
When gas turbine raising speed is to N3 >=N3_Gov and before gas turbine is grid-connected, rotating speed load controlling unit provides corresponding fuel valve position command (FSR_SPL) according to N3 rotating speed benchmark by indifference mode, now boosting velocity procedure fuel controlling unit output (FSR_N1) will be carried out ratio output in the N1 benchmark of N1 benchmark control logic adjustment, for the high state of gas generator being limited by minimum value selector.After grid-connected breaker closing, rotating speed load controlling unit will switch to poor control mode.Wherein N3 is that power turbine rotating speed, N3_Gov are synchronous slow train rotating speeds.
6. lightweight gas turbine control system according to claim 1, is characterized in that:
The acceleration controlling unit (FSR_ACC) of described fuel control unit (FCU) and temperature control loop joint (FSR_TMP);
Gas turbine raising speed, synchronous and generate electricity by way of merging two or more grid systems during, Acceleration Control link (FSR_ACC) and temperature control loop joint (FSR_TMP) is monitoring the fuel gas temperature of import before the acceleration of three rotors of gas turbine and power turbine always, and by minimum value selector, the fuel gas temperature of import before the acceleration of three rotors and power turbine is limited in below controlling value.
7. lightweight gas turbine control system according to claim 2, is characterized in that:
The removal of load controlling unit (FSR_THR) of described fuel control unit (FCU);
When gas turbine under larger load suddenly from guaranteeing when (being called removal of load) that with grid disconnection gas turbine is not occurring to get back to synchronous speed excess revolutions and flame-out prerequisite.
8. lightweight gas turbine control system according to claim 2, is characterized in that:
The maximum value limiting element (FSR_MAX) of described fuel control unit (FCU) and minimum value limiting element (FSR_MIN);
Gas turbine raising speed, synchronous and generate electricity by way of merging two or more grid systems during, the significantly variation of fuel limitation amount, steady to guarantee unit operation.
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| CN111520235A (en) * | 2020-03-20 | 2020-08-11 | 中国船舶重工集团公司第七O三研究所无锡分部 | Handling method for sudden shutdown of gas turbine in high-working-condition operation |
| CN111779579A (en) * | 2020-08-12 | 2020-10-16 | 中石油西北联合管道有限责任公司 | Gas turbine safety control method and device based on redundant safety chain |
| CN111810300A (en) * | 2020-07-03 | 2020-10-23 | 东方电气自动控制工程有限公司 | Gas turbine protection device |
| CN112081671A (en) * | 2019-06-13 | 2020-12-15 | 中国科学院工程热物理研究所 | Gas turbine fuel control device and simulation test method based on same |
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| CN112081671A (en) * | 2019-06-13 | 2020-12-15 | 中国科学院工程热物理研究所 | Gas turbine fuel control device and simulation test method based on same |
| CN111520235A (en) * | 2020-03-20 | 2020-08-11 | 中国船舶重工集团公司第七O三研究所无锡分部 | Handling method for sudden shutdown of gas turbine in high-working-condition operation |
| CN111810300A (en) * | 2020-07-03 | 2020-10-23 | 东方电气自动控制工程有限公司 | Gas turbine protection device |
| CN111779579A (en) * | 2020-08-12 | 2020-10-16 | 中石油西北联合管道有限责任公司 | Gas turbine safety control method and device based on redundant safety chain |
| CN112666922A (en) * | 2020-12-17 | 2021-04-16 | 中国科学院工程热物理研究所 | Method and system for testing light gas turbine control system |
| CN113946122A (en) * | 2021-10-22 | 2022-01-18 | 中国科学院工程热物理研究所 | Gas turbine parameter redundancy voting method based on confidence coefficient weight floating |
| CN113946122B (en) * | 2021-10-22 | 2024-02-13 | 中国科学院工程热物理研究所 | Gas turbine parameter redundancy voting method based on confidence weight floating |
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Application publication date: 20140205 |