CN102739143A - Generator set output frequency regulation method, device and generator set - Google Patents
Generator set output frequency regulation method, device and generator set Download PDFInfo
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- CN102739143A CN102739143A CN2012102176292A CN201210217629A CN102739143A CN 102739143 A CN102739143 A CN 102739143A CN 2012102176292 A CN2012102176292 A CN 2012102176292A CN 201210217629 A CN201210217629 A CN 201210217629A CN 102739143 A CN102739143 A CN 102739143A
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Abstract
The invention discloses a generator set output frequency regulation method, a device and a generator set, and belongs to the field of power supply and distribution. The method, the device and the generator set are designed for solving the problem that the generator stops working due to the motor which is overhot during long-time operation in the prior art, and reducing the working reliability of a load powered by the motor. The generator set output frequency regulation method comprises the following steps of: obtaining a control parameter value of the motor; when the control parameter value exceeds a preset threshold, breaking the connection of the motor in the generator and the load; and shifting the motor in the generator from a first rotation speed to a second rotation speed, so that the output frequency of the generator can be shifted from a first output frequency to a second output frequency.
Description
Technical field
The present invention relates to supply the distribution field, relate in particular to generating set output frequency control method, device and generating set.
Background technology
Along with development of Communication Technique, mobile communication becomes master indispensable in the work life gradually and uses the communication approach, so the coverage of signal of communication is also extended gradually.The communication base station covering various places too that are used for the signal of communication transmission.When communication base station is worked, supply power through the alternating current of public electric wire net transmission, still, communication base station out of doors is difficult to supply power through public electric wire net because of the reason of geographical environment sometimes, at this moment, can be that communication base station is supplied power through generating set.
In the prior art, when supplying power for communication base station, engine need be under fixing frequency continuous firing, be generally 50 hertz or 60 hertz; In the process of engine operation, the temperature of engine can rise thereupon; Yet the engine that keeps work for a long time can make and overheated situation occur, and as safeguard measure, engine can quit work to avoid the damage of engine or communication base station; At this moment, lose power supply, also stopped communication signal transmission then as the communication base station of engine loading, thus make communicate the portable terminal of signal transmission through this communication base station can't operate as normal.
Summary of the invention
Embodiments of the invention provide a kind of generating set output frequency control method, Apparatus and system, in the protection generating set, keep power supply incessantly, to improve the reliability of electric set electric supply.
For achieving the above object, embodiments of the invention adopt following technical scheme:
On the one hand, the invention provides a kind of generating set output frequency control method, comprising:
Obtain the control parameter value in the generating set; When said control parameter value exceeds pre-set threshold, break off being connected between generator and the load in the said generating set; Engine in the said generating set is switched to second rotating speed from first rotating speed, so that the output frequency of said generating set switches to second output frequency from first output frequency; Wherein said engine drives the alternating current that said generator is exported first output frequency with first rotating speed; Said engine drives the alternating current that said generator is exported second output frequency with second rotating speed; And said first rotating speed is less than said second rotating speed, and said first output frequency is less than said second output frequency.
On the other hand, the present invention also provides a kind of output frequency adjusting device, comprising:
The control parameter value acquiring unit is used for obtaining the control parameter value of generating set; The load switching units is used to receive the Control Parameter that said control parameter value acquiring unit is obtained, and when said control parameter value exceeds pre-set threshold, breaks off being connected between generator and the load in the said generating set; Switch unit; Be used for after knowing being connected between generator that said load switching units breaks off said generating set and the load; Said engine is switched to second rotating speed from first rotating speed, so that the output frequency of said generating set switches to second output frequency from first output frequency; Wherein said engine drives the alternating current that said generator is exported first output frequency with first rotating speed; Said engine drives the alternating current that said generator is exported second output frequency with second rotating speed; And said first rotating speed is less than said second rotating speed, and said first output frequency is less than said second output frequency.
On the other hand, the present invention also provides a kind of generating set, comprising: generator, engine, controller and checkout gear;
Said checkout gear is used for obtaining the control parameter value of said generating set; Said generator is used to export the alternating current of pairing first output frequency of first frequency wire jumper, or exports the alternating current of pairing second output frequency of second frequency wire jumper; Wherein, said first output frequency is less than said second output frequency; Said engine is used for driving the alternating current that said generator is exported first output frequency with first rotating speed, or drives the alternating current that said generator is exported second output frequency with second rotating speed; The said first rotating speed end makes said engine with first rotation speed operation, and the said second rotating speed end makes said engine with second rotation speed operation; Wherein, said first rotating speed is less than said second rotating speed; Said controller is used for the comparative result according to said control parameter value and threshold value, breaks off or connects said generator and load; Switch first frequency wire jumper or second frequency wire jumper and switch the first rotating speed end or the second rotating speed end, to control the alternating current that said generating set is exported the alternating current of first output frequency or exported second output frequency.
A kind of generating set output frequency control method, device and generating set that the embodiment of the invention provides; Through obtaining the control parameter value in the cluster engine; Improve the rotating speed of engine and the rotating speed of engine fan, increase the heat exhaust of engine, the output frequency of regulator generator; Thereby avoid engine Yin Wendu too high and quit work, improved generating set and the reliability of the load of supplying power through generating set.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art; The accompanying drawing of required use is done to introduce simply in will describing embodiment below; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the flow chart of the described generating set output frequency of embodiment of the invention control method;
Fig. 2 is the flow chart of the described generating set output frequency control method of regulating through water temperature value of the embodiment of the invention;
Fig. 3 is the flow chart of the generating set output frequency control method of described second output frequency that switches generator through power output of the embodiment of the invention;
Fig. 4 is the flow chart of the generating set output frequency control method of described first or second output frequency that switches generator through power output of the embodiment of the invention;
Fig. 5 is the structural representation of the described output frequency adjusting device of the embodiment of the invention;
Fig. 6 is the structural representation of the described generating set of the embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing embodiment of the invention generating set output frequency control method, device, system are described in detail.
Should be clear and definite, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
For the outdoor communication base station that is erected at as load; It is the fixedly power supply of output frequency of communication base station that generating set need be set; Said at home output frequency generally is divided into first output frequency and second output frequency, and when wherein carrying out the output of first output frequency, the output frequency of alternating current is 60 hertz; When carrying out the output of second output frequency; The output frequency of alternating current is 50 hertz, and the output frequency of first output frequency and second output frequency also can be other frequencies, does not limit at this; Wherein said generating set comprises: generator, engine, controller, relay, load contactor and checkout gear etc.; Said generator comprises: excitation winding, voltage regulator; Said engine comprises: water tank and throttle adjustment electromagnetically operated valve.In scene shown in Figure 6, said checkout gear comprises temperature sensor, and the output of generator is connected with load through the load contactor.
Engine is arranged at the first rotating speed end, and through the rotation drive generator rotation of engine, generator is arranged at first output frequency; For example 50 hertz; Voltage regulator in the generator is selected the first frequency wire jumper for use, promptly corresponding frequency wire jumper with 50 hertz, at this moment; The load contactor is in off-state, and the output of generator and the input of load are broken off; Because of confirming that output frequency is 50 hertz, according to the computing formula of generator output frequency: f=pn/60, wherein f is the output frequency of generator, and p is the magnetic pole logarithm of generator, and n is the rotating speed of generator; This rotating speed is that engine passes through the rotating speed that rotates behind the burning diesel oil, promptly drives the rotating speed of generator rotation; Under the situation that the magnetic pole logarithm of generator is fixed, can confirm the pairing generator speed of output frequency, for example, the generator speed of 50 hertz of correspondences is 1500 rev/mins, the generator speed of 60 hertz of correspondences is 1800 rev/mins.
Engine rotation drives generator and starts, and makes the alternating current of 50 hertz of generator outputs, and corresponding generator speed is 1500 rev/mins; Under the state that the load contactor breaks off, preheating is carried out in generator no-load running 1-5 minute; When starter-generator; The voltage of the alternating current that generator produces is less than rated voltage; Avoid export the discontented alternating current of in full amount deciding voltage through the voltage regulator in the generator this moment, and through voltage regulator the excitation winding of generator is fed back, and improves the exciting current of excitation winding; With the magnetic flux of raising excitation winding, thereby make the alternating current of the output of generator reach rated voltage quickly; And; Said voltage regulator can detect the frequency of alternating current; When the frequency wire jumper of said voltage regulator is arranged at the first frequency wire jumper; For example select 50 hertz frequency wire jumper for use, when the low frequency ac that produces like generator has exceeded corresponding frequency range, then can shut down generator and load are protected.
After preheating finished, the output of controller control generator was communicated with load contactor between the input of load, through generator load is supplied power.
For the output frequency to generator in the generating set operate as normal is regulated, a kind of generator output frequency control method, as shown in Figure 1, comprising:
100, obtain control parameter value in the generating set;
101, when said control parameter value exceeds pre-set threshold, break off being connected between generator and the load in the said generating set;
102, the engine in the said generating set is switched to second rotating speed from first rotating speed, so that the output frequency of said generating set switches to second output frequency from first output frequency.
Wherein said engine drives the alternating current that said generator is exported first output frequency with first rotating speed; Said engine drives the alternating current that said generator is exported second output frequency with second rotating speed; And said first rotating speed is less than said second rotating speed, and said first output frequency is less than said second output frequency.
In the process of generating set work; Water temperature in the generating set in the water tank of engine rises along with heat that combustion fuel in the engine discharged gradually; When the water temperature in the water tank is elevated to uniform temperature,, can cause the shutdown protection of engine because temperature is too high; Thereby make engine can't continue as generator rotating speed is provided, also just can't drive generator and rotate to produce alternating current.
Therefore in the process of generating set, can obtain the control parameter value in the generating set through checkout gear, and compare, thereby control the operating condition of generator and engine in the generating set better according to this control parameter value and threshold value.
In this enforcement scene, said control parameter value comprises: the water temperature value of in-engine water tank in the said cluster engine; Said threshold value comprises: temperature threshold.
Said a kind of generator output frequency control method, preferred, as shown in Figure 2, obtain the control parameter value in the generating set, comprising:
200, obtain the water temperature value of in-engine water tank in the said generating set.
In the process of generating set work, the water temperature in the generating set in the water tank of engine rises along with heat that combustion fuel in the engine discharged gradually, through the temperature sensor that is arranged in the water tank water temperature value in the water tank is detected.
Preferably, said when said control parameter value exceeds pre-set threshold, break off being connected between generator and the load in the said generating set, comprising:
201, when the water temperature value of in-engine water tank in the said generating set exceeds predefined temperature threshold, break off being connected between generator and the said load in the said generating set.
Along with the continuous rising of water temperature, make engine overheated situation occur easily, and engine overheat can cause mechanical part undue wear to occur; Therefore for the protection engine, when water temperature is too high, 95 degree for example, generator can stop load being supplied power, thereby makes communication base station as load not have the electricity station of delaying.
Situation for avoiding engine overheat to occur shutting down preestablishes temperature threshold, for example 90 degree; When detecting water temperature value in the water tank, temperature sensor arrives 91 when spending; Need to improve the output frequency of generator, and and then improve the rotating speed of engine blower, accelerate the discharge of heat in the engine; At this moment, be arranged at the load contactor between generator and the load through the controller disconnection, the generation outage machine is that load is supplied power; Can certainly break off the connection between generator and the load through other modes.
Preferably, said engine in the said generating set is switched to second rotating speed from first rotating speed, so that the output frequency of said generating set switches to second output frequency from first output frequency,, comprising:
202, the generator in the said generating set is switched to said second frequency wire jumper from said first frequency wire jumper; Wherein, Said first frequency wire jumper makes said generator export the alternating current of first output frequency, and said second frequency wire jumper makes said generator export the alternating current of second output frequency.
203, the first rotating speed end that is connected with engine in the said generating set of disconnection, and the adhesive second rotating speed end, the wherein said first rotating speed end makes said engine with first rotation speed operation, and the said second rotating speed end makes said engine with second rotation speed operation.
204, the engine in the said generating set of control connects said generator and said load again with said second rotation speed operation, makes said generator export the alternating current of said second output frequency.
When carrying out the switching of generator output frequency; The higher second frequency wire jumper of output frequency that needs frequency wire jumper to the alternating current of switched voltage adjuster; In the present invention; Promptly select 60 hertz frequency wire jumper of working voltage adjuster, so that generator is applicable to the alternating current of output second output frequency.
In the process of the frequency wire jumper in the switched voltage adjuster; Controller is also controlled the first rotating speed end adhesive, the second rotating speed end that breaks off the throttle adjustment electromagnetically operated valve; Engine speed improves, and through engine drives the rotating speed of generator is also promoted thereupon, improves the output frequency of generator.The switching of said throttle adjustment electromagnetically operated valve can be realized by controller control relay and then control throttle adjustment electromagnetically operated valve.
When engine switches to the second rotating speed end, and the voltage regulator in the generator is when switching to corresponding second frequency wire jumper and carrying out the output of alternating current of second output frequency, i.e. the exportable 60 hertz alternating current of generator; Again be communicated with through controller control load contactor, 60 hz ac that generator is produced are electric and transfer to load, thereby load is supplied power; In load, need support respectively the alternating current of 50 hertz and 60 hertz is carried out rectification, after switching output frequency, can support the alternating current of first output frequency or second output frequency is carried out rectification, thereby load is supplied power at generator.
After switching the alternating current of 60 hertz of outputs, the rotating speed of engine improves, and the rotation speed of the fan of engine also improves thereupon, thereby has increased heat exhaust, has reduced the temperature of engine, has avoided engine overheat and the situation of generator outage occurs.
In the process that generator is supplied power to load; When generator is exported the alternating current of 50 hertz of first output frequency; The situation of the power output of engine near the rated power under this output frequency possibly occur, this moment, shutting down may appear in engine, had reduced the reliability of supplying power through generating set; And this moment, the consumption of diesel oil increased, and had increased the cost that the outdoor communication base station is supplied power.
For addressing the above problem, above-mentioned generating set output frequency control method, preferred, said control parameter value also comprises: the power output of generator in the said generating set; Said threshold value comprises: first power threshold.
In order through the power output of generator in the generating set generating set to be controlled better, preferred, as shown in Figure 3, the said control parameter value of obtaining in the generating set also comprises:
300, obtain the power output of generator described in the said generating set.
Power harvester through being arranged between generator and the load is gathered the power output of generator, and the row operation of going forward side by side of output voltage and the output current of said power output through gathering generator respectively obtains, and for example power output is 9.1 kilowatts.
Further, said when said control parameter value exceeds pre-set threshold, break off being connected between generator and the load in the said generating set, also comprise:
301,, break off being connected between generator and the said load in the said generating set when the power output of generator in the said generator family during greater than predefined first power threshold.
When the power output of obtaining is higher than the first set power threshold; For example 9 kilowatts, then break off the load contactor between generator and the load, and generator is switched use second frequency wire jumper through the control of controller through controller; Engine is switched to the second rotating speed end; So that generator is exported the alternating current of second output frequency, the mode of wherein switching the alternating current of exporting second output frequency is identical with step 202, step 203 and step 204, repeats no more at this; Through switching the alternating current of output second output frequency, improved the rated power of generator output, improved the rotating speed of engine, reduce the consumption of diesel oil, thereby realized the improvement of engine operating condition.
When the alternating current of second output frequency of 60 hertz of generator outputs; If the load of generator is less; Then can cause the invalid loss of the engine that drives the generator rotation; Wasted the diesel oil that acts as a fuel, and the too high rotating speed of engine and generator also can acceleration motor and generator in the wearing and tearing of mechanical organ.
For addressing the above problem, preferred, said threshold value also comprises: second power threshold, wherein said second power threshold is less than said first power threshold.
Further, said generating set output frequency control method also comprises:
302,, break off being connected between generator and the said load in the said generating set when the power output of generator in the said generating set during less than second power threshold that is provided with in advance.
When second threshold value that sets is 7 kilowatts; And the power output of the generator that power harvester is obtained is 6.8 kilowatt hours; The power output of generator is lower than second power threshold; Then break off the load contactor between generator and the load, thereby temporarily the generation outage machine is supplied power to load, so that carry out the switching of generator output frequency through the control of controller.
Further, when the power output of generator in the said generating set during, break off after being connected between generator and the said load in the said generating set, also comprise less than second power threshold that is provided with in advance:
303, the engine in the said generating set is switched to the said first rotating speed end from the said second rotating speed end,, and be communicated with said load again so that the output frequency of said generating set switches to said second output frequency from said first output frequency.
When carrying out the switching of generator output frequency; Frequency wire jumper to the first frequency wire jumper that needs the switched voltage adjuster; In the present invention, promptly select 50 hertz frequency wire jumpers of working voltage adjuster, so that generator is applicable to the alternating current of output first output frequency; Through the first rotating speed end of controller control adhesive throttle adjustment electromagnetically operated valve, engine speed reduces, and through engine drives the rotating speed of generator is also decreased.
After switching the alternating current of 50 hertz of outputs, under the less situation of the load of generator, reduced the rotation speed of the fan of engine, reduced the wearing and tearing of the mechanical organ of generator, prolonged the useful life of the generator of supplying power for load.
When engine switches to the first rotating speed end, and the voltage in the corresponding generator is transferred machine to switch to corresponding first frequency wire jumper to carry out the output of the alternating current of first output frequency, promptly export 50 hertz alternating current; Again be communicated with through controller control load contactor, thereby load supplied power through 50 hertz the alternating current that generator produced.
In generating set; Can detect the water temperature value in the water tank or pass through the power output that power harvester detects generator output through temperature sensor separately; Also can be simultaneously detect through temperature sensor and power harvester power output to water temperature value in the water tank and generator output; Thereby through water temperature value and power output generating set is controlled better, and then further increased generating set running and the reliability of the load operation of supplying power through generating set.
A kind of generating set output frequency control method that the embodiment of the invention provides; Through obtaining the control parameter value in the engine water tank; Improve the rotating speed of engine and the rotating speed of generator fan, increase the heat exhaust of engine, thereby avoid engine Yin Wendu too high and quit work; The reliability of the loaded work piece that has improved engine, generator and supplied power through generating set, wherein Control Parameter can be the power output of water temperature value, generator.
Further; The power output of passing through the generator that obtains makes generator reasonably switch the alternating current of output first output frequency and the frequency alternating current of second output frequency; Thereby engine and generator are under the more excellent operating mode works; Reduce the wearing and tearing of mechanical organ in engine and the generator, and reduced the oil consumption when engine moves.
Further; At a kind of generating set output frequency control method of the present invention; Temperature sensor and power harvester can also be set simultaneously; Detect according to the power output of the water temperature value of engine inner water tank in the generating set and generator operating state respectively, and effectively control, and then control the operating mode of generator and engine in the generating set better generating set.
Corresponding with above-mentioned a kind of generating set output frequency control method, the present invention also provides a kind of output frequency adjusting device, and is as shown in Figure 5, comprising:
The control parameter value acquiring unit is used for obtaining the control parameter value of generating set;
The load switching units receives the Control Parameter that said control parameter value acquiring unit is obtained, and is used for when said control parameter value exceeds pre-set threshold, breaks off being connected between generator and the load in the said generating set;
Switch unit; Be used for after knowing being connected between generator that said load switching units breaks off said generating set and the load; Said engine is switched to second rotating speed from first rotating speed, so that the output frequency of said generating set switches to second output frequency from first output frequency;
Wherein said engine drives the alternating current that said generator is exported first output frequency with first rotating speed; Said engine drives the alternating current that said generator is exported second output frequency with second rotating speed; And said first rotating speed is less than said second rotating speed, and said first output frequency is less than said second output frequency.
Implement for the water temperature value through the engine inner water tank operating mode of generating set to be controlled in the scene at of the present invention first, optional, said control parameter value comprises: the water temperature value of in-engine water tank in the said cluster engine; Said threshold value comprises: temperature threshold.
Further; Said load switching units; Receive the water temperature value that said control parameter value acquiring unit is obtained; And specifically be used for when the water temperature value of the in-engine water tank of said generating set exceeds predefined temperature threshold, break off being connected between generator and the said load in the said generating set;
Said switch unit comprises:
Frequency wire jumper handover module; Be used for the generator of said generating set is switched to said second frequency wire jumper from said first frequency wire jumper; Wherein, Said first frequency wire jumper makes said generator export the alternating current of first output frequency, and said second frequency wire jumper makes said generator export the alternating current of second output frequency;
Rotating speed end-grain cutting die change piece; Be used for breaking off the first rotating speed end that is connected with the engine of said generating set; And the adhesive second rotating speed end, the wherein said first rotating speed end makes said engine with first rotation speed operation, and the said second rotating speed end makes said engine with second rotation speed operation;
Running recovers module, and the engine that is used for controlling said generating set connects said generator and said load again with said second rotation speed operation, makes said generator export the alternating current of said second output frequency.
Obtain the water temperature value of engine inner water tank through temperature sensor, and compare, when water temperature value is higher than temperature threshold with default temperature threshold; Then break off being connected between generator and the load, and engine is switched to the second rotating speed end, generator is switched to the second frequency wire jumper; The engine drives generator is rotated; Export the alternating current of second output frequency, thereby improve the rotating speed of engine blower, reduce the temperature of engine; Avoid engine because of overheated and shutdown, thereby improved the reliability of generating set work.
Implement for the output frequency through generator in the generating set operating mode of generating set to be controlled in the scene at second of the present invention, optional, said control parameter value also comprises: the power output of generator in the said generating set; Said threshold value also comprises: first power threshold.
Further; Said load switching units; Receive the said power output that said output power acquisition module is obtained; And specifically be used for when the power output of said generating set generator during greater than predefined first power threshold, break off being connected between generator and the said load in the said generating set;
Said switch unit comprises:
Frequency wire jumper handover module; Be used for the generator of said generating set is switched to said second frequency wire jumper from said first frequency wire jumper; Wherein, Said first frequency wire jumper makes said generator export the alternating current of first output frequency, and said second frequency wire jumper makes said generator export the alternating current of second output frequency;
Rotating speed end-grain cutting die change piece; Be used for breaking off the first rotating speed end that is connected with the engine of said generating set; And the adhesive second rotating speed end, the wherein said first rotating speed end makes said engine with first rotation speed operation, and the said second rotating speed end makes said engine with second rotation speed operation;
Running recovers module, and the engine that is used for controlling said generating set connects said generator and said load again with said second rotation speed operation, makes said generator export the alternating current of said second output frequency.
Further, said threshold value comprises: second power threshold, wherein said second power threshold is less than said first power threshold.
Further; Said load switching units; Receive the said power output that the output power acquisition module in the said generating set is obtained; Also specifically be used for when said power output during, break off being connected between generator and the said load in the said generating set less than second power threshold that is provided with in advance.
Further, said frequency wire jumper handover module also is used for the generator of said generating set is switched to said first frequency wire jumper from said second frequency wire jumper;
Said rotating speed end-grain cutting die change piece also is used for breaking off the second rotating speed end that is connected with the engine of said generating set, and the adhesive first rotating speed end;
Said running recovers module, and the engine that also is used for controlling said generating set connects said generator and said load again with said first rotation speed operation, makes said generator export the alternating current of said first output frequency.
Through power harvester is set in generating set, to gather the power output of generator output end, pass through the power output of obtaining and set first power threshold and second power threshold compare, wherein first power threshold is greater than second power threshold; When said power output during greater than first power threshold, the rated power of the power output that generator then is described during near first output frequency, at this moment; Engine is switched to the second rotating speed end, generator is switched to the second frequency wire jumper, through the engine drives generator; Make generator export the alternating current of second output frequency; Improve the rated power of generator output and the rotating speed of engine, reduced the consumption of diesel oil, thereby realized the improvement of engine operating condition; Engine is with second rotational speed, when the drive generator is exported the alternating current of second output frequency, for avoiding invalid power loss; When power output during less than second power threshold that sets, then engine is switched to the first rotating speed end, generator is switched to the first frequency wire jumper; Thereby make generator export the alternating current of first output frequency; Because make the rotating speed of engine maintain more suitable rotating speed in running, reduced the consumption of diesel oil, reduced cost; And alleviated the wearing and tearing between the mechanical organ in engine and the generator, prolonged the useful life of generating set.
Certainly; Further; Can in generating set, be provided for the power harvester that temperature sensor that water temperature value detects and power output detect respectively, thereby control the operating mode of generating set better, make the work of generating set more reliable through water temperature value and power output two aspects.
Corresponding with device with above-mentioned a kind of generating set output frequency control method, the present invention also provides a kind of generating set, and is as shown in Figure 6, comprising:
Generator, engine, controller, relay, load contactor and checkout gear;
Said generator comprises: excitation winding, voltage regulator;
Said engine comprises: water tank and throttle adjustment electromagnetically operated valve;
Said checkout gear is used for obtaining the control parameter value of said generating set;
Said generator is used to export the alternating current of pairing first output frequency of first frequency wire jumper, or exports the alternating current of pairing second output frequency of second frequency wire jumper; Wherein, said first output frequency is less than said second output frequency;
Said engine is used for driving the alternating current that said generator is exported first output frequency with first rotating speed, or drives the alternating current that said generator is exported second output frequency with second rotating speed; The said first rotating speed end makes said engine with first rotation speed operation, and the said second rotating speed end makes said engine with second rotation speed operation; Wherein, said first rotating speed is less than said second rotating speed;
Said controller is used for the comparative result according to said control parameter value and threshold value, breaks off or connects said generator and load; Switch first frequency wire jumper or second frequency wire jumper and switch the first rotating speed end or the second rotating speed end, to control the alternating current that said generating set is exported the alternating current of first output frequency or exported second output frequency.
Wherein, said checkout gear can be the temperature sensor that is arranged in the water tank, and/or is arranged at the output of generator and the power harvester between the load.Said control parameter value can be water temperature value and/or power output.
Said threshold value can comprise temperature threshold, first power threshold and/or second power threshold, and wherein second power threshold is less than first power threshold.
When said water temperature value during greater than said temperature threshold; Said controller; Specifically be used to break off said generator and said load, switch to the second rotating speed end of said engine and the second frequency wire jumper of said generator, so that said generator is exported the alternating current of second output frequency.
When said power output during greater than said first power threshold; Said controling appliance body is used to break off said generator and said load; Switch to the second rotating speed end of said engine and the second frequency wire jumper of said generator, so that said generator is exported the alternating current of second output frequency.
When said power output during less than said second power threshold; Said controller; Specifically be used to break off said generator and said load; Switch to the first rotating speed end of said engine and the first frequency wire jumper of said generator, so that said generator is exported the alternating current of first output frequency.
When controller carried out the switching of output frequency through the water temperature of obtaining to generator, for example, when the alternating current of 50 hertz of generator outputs, and the water temperature value of temperature sensor collection was 91 when spending, and controller is judged water temperature value and temperature threshold (90 spend); Water temperature is higher than temperature threshold, and then controller control load contactor breaks off, and is electric thereby temporarily stop through generator; Control the second frequency wire jumper that voltage regulator switches to 60 hertz respectively through controller, and switch to the second rotating speed end through relay control throttle adjustment electromagnetically operated valve; Again be communicated with the load contactor, generator is supplied power to load to export 60 hertz alternating current; In the process of having regulated the generator output frequency; Improve the rotating speed of engine blower, increased the heat exhaust of engine, thereby reduced the temperature of engine; Avoided engine to shut down, and then also improved reliability through engine, generator and loaded work piece because of overheated.
When controller carries out the switching of output frequency through the power output that collects to generator, for example, the alternating current that generator output is 50 hertz, first power threshold that in controller, is provided with is 9 kilowatts, second power threshold is 7 kilowatts; The power output that power harvester collects generator is 9.1 kilowatts, has exceeded first power threshold that sets, and then controller control load contactor breaks off, and temporarily stopping through generator is that load is supplied power; After the load contactor broke off, the second frequency wire jumper of controller control voltage regulator to 60 hertz was to adapt to the alternating current of 60 hertz of generator outputs; And controller produces and exports 60 hertz alternating current through the relay control throttle adjustment electromagnetically operated valve second rotating speed end so that engine can drive generator; After voltage regulator and throttle adjustment solenoid control were accomplished, controller is the adhesive of control load contactor again, and 60 hertz alternating current is provided for load.
On the other hand, when the alternating current of 60 hertz of generator outputs, through the power output and second power threshold that are obtained are judged, thereby realization is with the switching of 50 hertz of low output frequencies.
A kind of generating set output frequency control method, device and generating set that the embodiment of the invention provides; Through obtaining the control parameter value in the cluster engine; Improve the rotating speed of engine and the rotating speed of engine fan, increase the heat exhaust of engine, the output frequency of regulator generator; Thereby avoid engine Yin Wendu too high and quit work, improved generating set and the reliability of the load of supplying power through generating set.
Further; The power output of passing through the generator that obtains makes generator reasonably switch the alternating current of output first output frequency and the frequency alternating current of second output frequency; Thereby engine and generator are under the more excellent operating mode works; Reduce the wearing and tearing of mechanical organ in engine and the generator, and reduced the oil consumption when engine moves, improved the reliability of generating set work.
The above; Be merely embodiment of the present invention, but protection scope of the present invention is not limited thereto, any technical staff who is familiar with the present technique field is in the technical scope that the present invention discloses; Can expect easily changing or replacement, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion by said protection range with claim.
Claims (15)
1. a generating set output frequency control method is characterized in that, comprising:
Obtain the control parameter value in the generating set;
When said control parameter value exceeds pre-set threshold, break off being connected between generator and the load in the said generating set;
Engine in the said generating set is switched to second rotating speed from first rotating speed, so that the output frequency of said generating set switches to second output frequency from first output frequency;
Wherein said engine drives the alternating current that said generator is exported first output frequency with first rotating speed; Said engine drives the alternating current that said generator is exported second output frequency with second rotating speed; And said first rotating speed is less than said second rotating speed, and said first output frequency is less than said second output frequency.
2. method according to claim 1 is characterized in that, said control parameter value comprises: the water temperature value of in-engine water tank in the said generating set;
Said when said control parameter value exceeds pre-set threshold, break off being connected between generator and the load in the said generating set, comprising:
When the water temperature value of in-engine water tank in the said generating set exceeds predefined temperature threshold, break off being connected between generator and the said load in the said generating set.
3. method according to claim 1 is characterized in that, said control parameter value comprises: the power output of generator in the said generating set;
Said when said control parameter value exceeds pre-set threshold, break off being connected between generator and the load in the said generating set, comprising:
When the power output of generator in the said generating set during, break off being connected between generator and the said load in the said generating set greater than predefined first power threshold.
4. according to each described method of claim 1-3; It is characterized in that; Said engine in the said generating set is switched to second rotating speed from first rotating speed,, comprising so that the output frequency of said generating set switches to second output frequency from first output frequency:
Generator in the said generating set is switched to said second frequency wire jumper from said first frequency wire jumper; Wherein, Said first frequency wire jumper makes said generator export the alternating current of first output frequency, and said second frequency wire jumper makes said generator export the alternating current of second output frequency;
Break off with said generating set in the first rotating speed end that is connected of engine, and the adhesive second rotating speed end, the wherein said first rotating speed end makes said engine with first rotation speed operation, the said second rotating speed end makes said engine with second rotation speed operation;
Control engine in the said generating set with said second rotation speed operation, connect said generator and said load again, make said generator export the alternating current of said second output frequency.
5. method according to claim 3 is characterized in that, also comprises:
When the power output of generator in the said generating set during less than second power threshold that is provided with in advance, break off being connected between generator and the said load in the said generating set, wherein said second power threshold is less than said first power threshold.
6. method according to claim 5 is characterized in that, when the power output of generator in the said generating set during less than second power threshold that is provided with in advance, breaks off after being connected between generator and the said load in the said generating set, also comprises:
Engine in the said generating set is switched to the said first rotating speed end from the said second rotating speed end,, and be communicated with said load again so that the output frequency of said generating set switches to said second output frequency from said first output frequency.
7. an output frequency adjusting device is characterized in that, comprising:
The control parameter value acquiring unit is used for obtaining the control parameter value of generating set;
The load switching units is used to receive the Control Parameter that said control parameter value acquiring unit is obtained, and when said control parameter value exceeds pre-set threshold, breaks off being connected between generator and the load in the said generating set;
Switch unit; Be used for after being connected between generator that said load switching units breaks off said generating set and the load; Said engine is switched to second rotating speed from first rotating speed, so that the output frequency of said generating set switches to second output frequency from first output frequency;
Wherein said engine drives the alternating current that said generator is exported first output frequency with first rotating speed; Said engine drives the alternating current that said generator is exported second output frequency with second rotating speed; And said first rotating speed is less than said second rotating speed, and said first output frequency is less than said second output frequency.
8. device according to claim 7 is characterized in that, said control parameter value comprises: the water temperature value of in-engine water tank in the said cluster engine; Said load switching units; Specifically be used to receive the water temperature value that said control parameter value acquiring unit is obtained; And when the water temperature value of the in-engine water tank in the said generating set exceeds predefined temperature threshold, break off being connected between generator and the said load in the said generating set.
9. device according to claim 7 is characterized in that, said control parameter value comprises: the power output of generator in the said generating set;
Said load switching units; Specifically be used to receive the said power output that said output power acquisition module is obtained; And, break off being connected between generator and the said load in the said generating set when the power output of generator in the said generating set during greater than predefined first power threshold.
10. according to each described method of claim 7-9, it is characterized in that said switch unit specifically comprises:
Frequency wire jumper handover module; Be used for the generator of said generating set is switched to said second frequency wire jumper from said first frequency wire jumper; Wherein, Said first frequency wire jumper makes said generator export the alternating current of first output frequency, and said second frequency wire jumper makes said generator export the alternating current of second output frequency;
Rotating speed end-grain cutting die change piece; Be used for breaking off the first rotating speed end that is connected with the engine of said generating set; And the adhesive second rotating speed end, the wherein said first rotating speed end makes said engine with first rotation speed operation, and the said second rotating speed end makes said engine with second rotation speed operation;
Running recovers module, and the engine that is used for controlling said generating set connects said generator and said load again with said second rotation speed operation, makes said generator export the alternating current of said second output frequency.
11. device according to claim 9; It is characterized in that; Said load switching units; Also be used for when the power output of said generating set generator during less than second power threshold that is provided with in advance, break off being connected between generator and the said load in the said generating set, wherein said second power threshold is less than said first power threshold.
12. a generating set is characterized in that, comprising: generator, engine, controller and checkout gear;
Said checkout gear is used for obtaining the control parameter value of said generating set;
Said generator is used to export the alternating current of pairing first output frequency of first frequency wire jumper, or exports the alternating current of pairing second output frequency of second frequency wire jumper; Wherein, said first output frequency is less than said second output frequency;
Said engine is used for driving the alternating current that said generator is exported first output frequency with first rotating speed, or drives the alternating current that said generator is exported second output frequency with second rotating speed; The said first rotating speed end makes said engine with first rotation speed operation, and the said second rotating speed end makes said engine with second rotation speed operation; Wherein, said first rotating speed is less than said second rotating speed;
Said controller is used for the comparative result according to said control parameter value and threshold value, breaks off or connects said generator and load; Switch first frequency wire jumper or second frequency wire jumper and switch the first rotating speed end or the second rotating speed end, to control the alternating current that said generating set is exported the alternating current of first output frequency or exported second output frequency.
13. generating set according to claim 12 is characterized in that, said checkout gear specifically is used to obtain the said water temperature value of said engine inner water tank;
Said controller; Specifically be used for when said water temperature value during greater than predefined temperature threshold; Break off said generator and said load; Switch to the second rotating speed end of said engine and the second frequency wire jumper of said generator, so that said generator is exported the alternating current of second output frequency.
14. generating set according to claim 12 is characterized in that, said checkout gear specifically is used for, and obtains the power output of said generator;
Said controling appliance body is used for; When the power output of said generator during greater than preset first power threshold; Break off said generator and said load; Switch to the second rotating speed end of said engine and the second frequency wire jumper of said generator, so that said generator is exported the alternating current of second output frequency.
15. generating set according to claim 14; It is characterized in that said controller also is used for when said power output during less than said second power threshold; Break off said generator and said load; Switch to the first rotating speed end of said engine and the first frequency wire jumper of said generator, so that said generator is exported the alternating current of first output frequency, wherein said second power threshold is less than said first power threshold.
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| CN108790922A (en) * | 2018-07-18 | 2018-11-13 | 刘万祥 | A kind of electric vehicle power generation storing up electricity drive system and detection method |
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