CN103603726A - Automatic control system of gas turbine generator set - Google Patents
Automatic control system of gas turbine generator set Download PDFInfo
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- CN103603726A CN103603726A CN201310649490.3A CN201310649490A CN103603726A CN 103603726 A CN103603726 A CN 103603726A CN 201310649490 A CN201310649490 A CN 201310649490A CN 103603726 A CN103603726 A CN 103603726A
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Abstract
The invention relates to an automatic control system of a gas turbine generator set. The system adopts a plug-in board structure, and includes a main channel and a subsidiary channel. The main channel comprises a secondary power supply, a single chip microcomputer, an optical coupling input isolation circuit, a photovoltaic relay output isolation circuit, a data acquisition circuit, and an electromagnetic valve drive circuit. The subsidiary channel adopts a sequential logic circuit to realize the control function. The system provided by the invention completes cold start, process startup and programmed start by receiving external instructions, monitors the air inlet temperature, the exhaust temperature, the lubricating oil pressure, rotation speed and other over 30 operating parameters of the generator set during working, accomplishes over 20 fault protection and alarm functions, and transmits the exhaust temperature, the rotation speed, the fault and other information to a display control device, thus realizing the human-computer interaction function.
Description
Technical field
The present invention relates to a kind of automatic control system of intermediate frequency synchronous generator, relate in particular to a kind of Gas Turbine Generating Units automatic control system, belong to intermediate frequency (400Hz) power field, applicable generating frequency is 400Hz.
Background technique
Medium frequency electric generating unit is mainly used in aircraft and ground installation at home with advantages such as its volume are little, lightweight.Main source is import matching equipment, has the problems such as purchase channel is narrow, guarantee difficulty after sale, quality is large, volume is large, function imperfection.The domestic matured product that there is no at present goes on the market, and only has part grinding product, is grinding the problems such as product ubiquity poor compatibility, real-time is poor, reliability is not high, circuit level is not high, loosely organized, volume is large, quality is large.And at present, domestic application demand scope in this respect is progressively expanding.
Summary of the invention
The present invention is directed to above-mentioned problems of the prior art; provide a kind of and collected that multiple start-up routine is controlled, the Gas Turbine Generating Units automatic control system of generator operation monitoring and protection, solved the problem that intermediate frequency generator in prior art starts reliability and power generating quality poor stability.
Technological scheme of the present invention is as follows:
System employing Card structure, comprises main passage and from passage, main passage comprises secondary power supply, single-chip microcomputer, optocoupler input isolation circuit, photovoltaic relay output isolation circuit, data acquisition circuit, driving circuit for electromagnetic valve; The output terminal of secondary power supply, optocoupler input isolation circuit and data acquisition circuit is connected with single-chip microcomputer input end; Single-chip microcomputer output terminal connects photovoltaic relay output isolation circuit and driving circuit for electromagnetic valve; Signal conditioning circuit output terminal connection data Acquisition Circuit input end; From passage, adopt sequential logical circuit to realize and control function.
The power import end of described secondary power supply also connects reference diode, oppositely connects commutation diode simultaneously.
Described optocoupler input isolation circuit receiving key amount signal 1-switching value information n.
Described signal conditioning circuit receives temperature signal and tach signal, during temperature signal measurement, reference voltage is set and provides reference voltage for constant-current source circuit, and the pressure drop of voltage-regulator diode protection current output terminal is less than certain value; The output terminal of tach signal also connects voltage-stabiliser tube.
On described single-chip microcomputer, be connected with crystal oscillator.
Described photovoltaic relay output isolation circuit output terminal connects relay.
Described driving circuit for electromagnetic valve output terminal connected electromagnetic valve, the part that in driving circuit for electromagnetic valve, motor drive ic is connected with electrohydraulic control arranges TVS diode.
Described comprises secondary power supply, load module, output module and Logic control module from passage, and secondary power supply provides power supply to load module, output module and Logic control module; Load module, Logic control module and output module connect successively.
Described load module is accepted switching value signal 1-switching value information n.
Described output module output switch amount signal 1-switching value information n.
Advantageous effect of the present invention is as follows:
1, adopt without common cause failure design proposal Core Feature is realized to backup, increase the reliability of generator.
2, circuit level is higher, has effectively reduced volume and the quality of product.
3, increased partial interior parameter real time monitoring function, can understand more accurately the internal state of generator set, be conducive to operator and more reasonably formulate follow-up work plan.
4, adopt Card structure, can realize the replacement of plate level and combination stage and replace, convenient for maintaining and maintenance.
5, secondary power supply part, at power import end and connect a reference diode, prevents voltage functuation damage internal circuit, oppositely connects a power rectifier diode simultaneously, prevents from use power supply being connect instead, causes circuit damage; Between input and output signal, carry out light-coupled isolation, misoperation can not cause the damage to product yet.
6, signal input adopts light-coupled isolation that high voltage signal is converted to low voltage signal and send one-chip machine port processing, and signal output is that the signal producing by single-chip microcomputer is converted to high voltage break-make control signal through photovoltaic relay by low-voltage switches signal.
7, a reference voltage is set during thermometry and provides reference voltage for constant-current source circuit, the pressure drop of voltage-regulator diode protection current output terminal is less than certain value, prevents that thermal resistor from producing that overcurrent damages and tension measuring circuit overvoltage damage.
8, during tachometric survey at the output terminal of tach signal, and connect voltage-stabiliser tube, prevent that overvoltage from damaging single-chip microcomputer.
9, driving circuit for electromagnetic valve part, the part that motor drive ic is connected with electrohydraulic control has increased the transient overshoot voltage that TVS diode occurs in the course of the work for suppressing electrohydraulic control.
10, all high-voltage output terminal mouths of the present invention add diode and carry out reverse isolation, prevent the impact of external electric signal on control combination output signal.
Accompanying drawing explanation
Fig. 1 is structural representation block diagram in main passage of the present invention.
Fig. 2 is that the present invention is from channel design schematic block diagram.
Fig. 3 is start up curve schematic diagram of the present invention.
Fig. 4 is the unit generation frequency transient response curve synoptic diagram of unit when 100% load impact.
Fig. 5 is the unit generation frequency transient response curve synoptic diagram of unit when 100% load dump.
Embodiment
The present invention, with reference to accompanying drawing, in conjunction with specific embodiments, is described in detail as follows.
Embodiment
As shown in Figure 1-2, system employing Card structure, comprises main passage and from passage, main passage comprises secondary power supply, single-chip microcomputer, optocoupler input isolation circuit, photovoltaic relay output isolation circuit, data acquisition circuit, driving circuit for electromagnetic valve; The output terminal of secondary power supply, optocoupler input isolation circuit and data acquisition circuit is connected with single-chip microcomputer input end; Single-chip microcomputer output terminal connects photovoltaic relay output isolation circuit and driving circuit for electromagnetic valve; Signal conditioning circuit output terminal connection data Acquisition Circuit input end; Optocoupler input isolation circuit receiving key amount signal 1-switching value information n; Signal conditioning circuit receives temperature signal and tach signal, during temperature signal measurement, reference voltage is set and provides reference voltage for constant-current source circuit, and the pressure drop of voltage-regulator diode protection current output terminal is less than certain value; The output terminal of tach signal also connects voltage-stabiliser tube; Photovoltaic relay output isolation circuit output terminal connects relay; Described driving circuit for electromagnetic valve output terminal connected electromagnetic valve, the part that in driving circuit for electromagnetic valve, motor drive ic is connected with electrohydraulic control arranges TVS diode.
From passage, adopt sequential logical circuit to realize and control function; From passage, comprise secondary power supply, load module, output module and Logic control module, secondary power supply provides power supply to load module, output module and Logic control module; Load module, Logic control module and output module connect successively; Described load module is accepted switching value signal 1-switching value information n; Described output module output switch amount signal 1-switching value information n.
On described single-chip microcomputer, be connected with crystal oscillator.
The present invention has adopted without common cause failure redundancy backup design proposal, and computer is main control, and sequential circuit is Standby control.Two-part control circuit principle is completely different, can work alone completely, is independent of each other, and also can work simultaneously.While working, sequential circuit is controlled and is realized computer-controlled warm back-up simultaneously, completes the fundamental function control that generator set starts, moves, and has effectively improved the reliability of system.
Described secondary power supply provides working power for control module; Main control module is comprised of peripheral circuits such as single-chip microcomputer and crystal oscillator, reset circuits, realizes the control function of main passage, completes multiple start-up routine and more than 20 and plants faut detection and protective function; Input/output section realizes signal conversion through isolation processing; Data acquisition module gathers temperature and tach signal, send main control module to process, as the foundation of program judgement; Electrohydraulic control conditioning circuit regulates fuel feed amount, to reach the object that produces qualified electric energy.
From passage, adopting sequential logical circuit to realize controls function, completes the various start-up routines under the failure condition of main passage.
Secondary power supply is at power import end and connect a reference diode, prevents voltage functuation damage internal circuit, oppositely connects a power rectifier diode simultaneously, prevents from use power supply being connect instead, causes circuit to damage; Between input and output signal, carry out light-coupled isolation, misoperation can not cause the damage to product yet.
Signal input adopts light-coupled isolation that high voltage signal is converted to low voltage signal and send one-chip machine port processing, and signal output is that the signal producing by single-chip microcomputer is converted to high voltage break-make control signal through photovoltaic relay by low-voltage switches signal.
A reference voltage is set during thermometry and provides reference voltage for constant-current source circuit, the pressure drop of voltage-regulator diode protection current output terminal is less than certain value, prevents that thermal resistor from producing that overcurrent damages and tension measuring circuit overvoltage damage.
During tachometric survey, at the output terminal of tach signal, and connect voltage-stabiliser tube, prevent that overvoltage from damaging single-chip microcomputer.
Driving circuit for electromagnetic valve part, the part that motor drive ic is connected with electrohydraulic control has increased the transient overshoot voltage that TVS diode occurs in the course of the work for suppressing electrohydraulic control.
The all high-voltage output terminal mouths of the present invention add diode and carry out reverse isolation, prevent the impact of external electric signal on control combination output signal.
The index parameter of the generator that the present invention realizes is as follows.
1, start and control
Start up period, control system, mainly according to rotating speed and delivery temperature, is controlled actuators such as starting electrical machinery, electric heater, filling pump, solenoid valves, the time point that instruction output and instruction is cancelled meets the demands, and guarantees that unit energy normally starts.The instruction load situation of start-up course can be observed by monitoring starting resistor indirectly, and as shown in Figure 3, in figure, abscissa is time point to start up curve, and y coordinate is starting resistor.
By observing the turning point moment of starting resistor in figure, can judge generator control signal output situation.As started Startup time, generator is connected starting electrical machinery, and now starting resistor reduces; At 5s unit releasing constantly current-limiting resistance, starting resistor rising; At 11s constantly, generator is connected starting electrical machinery excitation; At 26s constantly, generator disconnects starting electrical machinery, motor excitation, and now starting resistor recovers.From starting resistor monitoring curve, find out, the present invention can carry out sequence control to each actuator of generator, completes generator and starts.
2, varying load operating mode
In actual use, the not timing change as required of generator loading situation, but require the alternating current voltage of generator output and frequency to keep substantially constant, this just requires the present invention can generator output be corrected fast and be recovered under load changing state, to maintain the relatively stable of output AC electricity condition.
The rated output of generating set that test is used is 75KW, and output voltage is alternating current 220V/400Hz.Fig. 4 and Fig. 5 are the unit generation frequency transient response curve of unit when 100% load impact and 100% load dump.
As can be seen from the figure,, when generator loading impact 100% or anticlimax 100%, the rotating speed of combustion machine has fuctuation within a narrow range, thereby causes unit generation frequency to glide to some extent or rise (but still between 400 ± 8Hz steady-state zone).Now control system, according to rotating speed deviation, is carried out rapid adjustment to generator electrohydraulic control, reduces or increases system fuel delivery, allow gas turbine rotary speed steadily, fast quick-recovery, make to generate electricity frequency retrieval near 400Hz.From generator generating frequency transient response curve, can find out, the frequency fluctuation of control system, in allowed band, is controlled effect comparatively desirable.
Native system is by receiving external command; complete generator cold start-up, false start, operation startup and launcher; in work, monitor the 30 remainder Operational Limitss such as generator set intake temperature, delivery temperature, lubricating oil pressure and rotating speed; complete 20 remainder error protection and warning functions; and the information such as delivery temperature, rotating speed and fault are reached to display control unit, realize human-computer interaction function.
Protection scope of the present invention is as the criterion with claim, not limited by specific embodiment.
Claims (10)
1. Gas Turbine Generating Units automatic control system, it is characterized in that system adopts Card structure, comprise main passage and from passage, main passage comprises secondary power supply, single-chip microcomputer, optocoupler input isolation circuit, photovoltaic relay output isolation circuit, data acquisition circuit, driving circuit for electromagnetic valve; The output terminal of secondary power supply, optocoupler input isolation circuit and data acquisition circuit is connected with single-chip microcomputer input end; Single-chip microcomputer output terminal connects photovoltaic relay output isolation circuit and driving circuit for electromagnetic valve; Signal conditioning circuit output terminal connection data Acquisition Circuit input end; From passage, adopt sequential logical circuit to realize and control function.
2. Gas Turbine Generating Units automatic control system according to claim 1, is characterized in that the power import end of described secondary power supply and connects reference diode, oppositely connects commutation diode simultaneously.
3. Gas Turbine Generating Units automatic control system according to claim 1, is characterized in that described optocoupler input isolation circuit receiving key amount signal 1-switching value information n.
4. Gas Turbine Generating Units automatic control system according to claim 1, it is characterized in that described signal conditioning circuit receives temperature signal and tach signal, during temperature signal measurement, reference voltage is set and provides reference voltage for constant-current source circuit, the pressure drop of voltage-regulator diode protection current output terminal is less than certain value; The output terminal of tach signal also connects voltage-stabiliser tube.
5. Gas Turbine Generating Units automatic control system according to claim 1, is characterized in that being connected with crystal oscillator on described single-chip microcomputer.
6. Gas Turbine Generating Units automatic control system according to claim 1, is characterized in that described photovoltaic relay output isolation circuit output terminal connects relay.
7. Gas Turbine Generating Units automatic control system according to claim 1, it is characterized in that described driving circuit for electromagnetic valve output terminal connected electromagnetic valve, the part that in driving circuit for electromagnetic valve, motor drive ic is connected with electrohydraulic control arranges TVS diode.
8. Gas Turbine Generating Units automatic control system according to claim 1, it is characterized in that described from passage, comprising secondary power supply, load module, output module and Logic control module, secondary power supply provides power supply to load module, output module and Logic control module; Load module, Logic control module and output module connect successively.
9. Gas Turbine Generating Units automatic control system according to claim 8, is characterized in that described load module accepts switching value signal 1-switching value information n.
10. Gas Turbine Generating Units automatic control system according to claim 1, is characterized in that described output module output switch amount signal 1-switching value information n.
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| CN201310649490.3A CN103603726B (en) | 2013-12-06 | 2013-12-06 | Gas Turbine Generating Units automatic control system |
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| CN201310649490.3A CN103603726B (en) | 2013-12-06 | 2013-12-06 | Gas Turbine Generating Units automatic control system |
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| CN103603726B CN103603726B (en) | 2016-01-13 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105673916A (en) * | 2016-04-06 | 2016-06-15 | 中国南方航空工业(集团)有限公司 | Control method and device of electromagnetic oil drain valve |
| CN113296491A (en) * | 2021-05-13 | 2021-08-24 | 中国船舶重工集团公司第七O三研究所无锡分部 | Fault diagnosis device and system for nuclear power emergency diesel generating set |
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| CN1389717A (en) * | 2002-07-10 | 2003-01-08 | 韩晓明 | Engine perfomance monitoring method and monitor |
| CN102419561A (en) * | 2010-09-28 | 2012-04-18 | 上海海能汽车电子有限公司 | Single-shaft parallel type hybrid power system whole vehicle controller |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105673916A (en) * | 2016-04-06 | 2016-06-15 | 中国南方航空工业(集团)有限公司 | Control method and device of electromagnetic oil drain valve |
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| CN113296491A (en) * | 2021-05-13 | 2021-08-24 | 中国船舶重工集团公司第七O三研究所无锡分部 | Fault diagnosis device and system for nuclear power emergency diesel generating set |
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| CN103603726B (en) | 2016-01-13 |
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