CN103490425B - A kind of asynchronous generating parallel machine operation voltage-stabilizing system and method - Google Patents
A kind of asynchronous generating parallel machine operation voltage-stabilizing system and method Download PDFInfo
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Abstract
The invention discloses a kind of asynchronous generating parallel machine operation voltage-stabilizing system, comprise signal sampling module, controller, magnetic energy regeneration switch provided, the wherein line voltage of signal sampling module acquires micro-capacitance sensor and phase current signal, and transfer to controller, when micro-capacitance sensor line voltage drop, controller controls the capacitive reactive power increase that magnetic energy regeneration switch provided exports, idle with the perception of balance sysmte, when micro-capacitance sensor line voltage rise, controller controls the capacitive reactive power reduction that magnetic energy regeneration switch provided exports, with capacitive reactive power superfluous in minimizing system; Magnetic energy regeneration switch provided, its one end is connected with micro-capacitance sensor, and the other end is connected with controller, receives the instruction that controller sends, and increases or reduce the capacitive reactive power of output according to instruction.System and method of the present invention, it can follow the tracks of line voltage fast, effectively can prevent Voltage Drop.
Description
Technical field
The present invention relates to line voltage to control and reactive power compensation technology field, particularly a kind of asynchronous generating parallel machine operation voltage-stabilizing system and method.
Background technology
Along with the day by day shortage in the conventional mineral such as coal, oil mass-energy source, develop the Main way that new forms of energy have also become countries in the world energy strategy development.Make full use of home environment feature, the building that construction generates electricity based on various energy resources, capacity is less and flexible for installation, island or community small-sized supply network (i.e. micro-capacitance sensor), both be conducive to alleviating mains supply pressure, being conducive to resource rational utilization again, is develop new forms of energy to alleviate the important way of energy starved.Asynchronous generator is applied in micro-capacitance sensor, can greatly reduces costs, and have be easy to safeguard, high reliability, therefore, the construction of voltage control problem to micro-capacitance sensor of research asynchronous generating parallel machine operation has very significant meaning.
The output voltage of asynchronous generator reduces with the increase of load, and its load characteristic significantly limit its application.Effectively can prevent Voltage Drop by increasing shunt excitation electric capacity, but load changes at random, unpredictable, organize exciting capacity by parallel connection more and carry out burning voltage and can not change along with the change of load, good effect can not be played.
Summary of the invention
The object of the invention is to overcome the shortcoming of prior art and deficiency, provide a kind of asynchronous generating parallel machine operation voltage-stabilizing system, it can follow the tracks of line voltage fast, effectively can prevent Voltage Drop.
Another object of the present invention is to provide a kind of asynchronous generating parallel machine operation method for stabilizing voltage.
Object of the present invention is realized by following technical scheme:
A kind of asynchronous generating parallel machine operation voltage-stabilizing system, comprises signal sampling module, controller, magnetic energy regeneration switch provided, wherein
Signal sampling module, comprise voltage sampling apparatus one, current sampling device one, one end of voltage sampling apparatus one is connected with micro-capacitance sensor, sampling micro-capacitance sensor two-route wire voltage signal, and line voltage signal is transferred to the controller be connected with its other end; One end of current sampling device one is connected with micro-capacitance sensor, sampling micro-capacitance sensor three road phase current signal, and phase current signal is transferred to the controller be connected with its other end;
Controller, micro-capacitance sensor two-route wire voltage signal, micro-capacitance sensor three road phase current signal that Received signal strength sampling module sends, and signal is analyzed, process, send corresponding instruction: when micro-capacitance sensor load increases, micro-capacitance sensor two-route wire voltage drop, controller controls the capacitive reactive power increase that magnetic energy regeneration switch provided exports, idle with the perception of balance sysmte; When the load of micro-capacitance sensor reduces, micro-capacitance sensor two-route wire voltage rise, controller controls the capacitive reactive power reduction that magnetic energy regeneration switch provided exports, and with capacitive reactive power superfluous in minimizing system, reaches the object of the voltage stabilization maintaining micro-capacitance sensor thus;
Magnetic energy regeneration switch provided, its one end is connected with micro-capacitance sensor, and the other end is connected with controller, receives the instruction that controller sends, and increases or reduce the capacitive reactive power of output according to instruction.
Described magnetic energy regeneration switch provided is connected by △ shape head and the tail successively by three groups of single-phase magnetic energy regeneration switch provided unit, and the three-phase wire of access micro-capacitance sensor in parallel, wherein single-phase magnetic energy regeneration switch provided unit comprises a reactor, a direct current capacitor and four insulated gate bipolar transistors, and four insulated gate bipolar transistors press full-bridge type connection, connect with after Capacitance parallel connection with reactor again.The size evaluation of harmonic content is one of important indicator of the quality of power supply, harmonic content is crossed conference and is caused system power dissipation to increase, the stability of the equipment such as motor reduces, and three groups of single-phase magnetic energy regeneration switch provided unit can reduce by △ shape head and the tail successively connection the triple-frequency harmonics amount that magnetic energy regeneration switch provided injects micro-capacitance sensor in running, reduce system power dissipation, improve stabilization of equipment performance.
Described single-phase magnetic energy regeneration switch provided unit also comprises capacitance overvoltage protective device; form with Capacitance parallel connection by after an insulated gate bipolar transistor and a resistant series; and the collector electrode of insulated gate bipolar transistor is connected with capacitance cathode, emitter is connected with electric capacity negative pole.When the capacitance overvoltage of single-phase magnetic energy regeneration switch provided unit; first controller sends signal and turns off insulated gate bipolar transistor on two brachium pontis; then discharged by the insulated gate bipolar transistor of capacitance overvoltage protective device; capacitance voltage is made to be down to safe range; avoid electric capacity over-voltage breakdown, play the effect of protection electric capacity.
Described signal sampling module also comprises voltage sampling apparatus two, and one end of voltage sampling apparatus two is connected with magnetic energy regeneration switch provided, the capacitance voltage signal of sampling magnetic energy regeneration switch provided, and by capacitance voltage Signal transmissions to the controller be connected with its other end.Controller judges the electric capacity whether overvoltage of each single-phase magnetic energy regeneration switch provided unit by the capacitance voltage signal that voltage sampling apparatus two is sampled.
Described signal sampling module also comprises current sampling device two, one end of current sampling device two is connected with magnetic energy regeneration switch provided, the current signal of sampling magnetic energy regeneration switch provided, and by current signal transfer to the controller be connected with its other end, after controller receives the current signal that current sampling device two sends, by its size I and rated current I
maxcompare: if I
max<I<2I
max, then controller sends corresponding signal by reducing the phase shifting angle β of micro-capacitance sensor voltage or increasing magnetic energy regeneration switch provided minimum capacity voltage V
c-minreduce electric current I, if I>2I
max, then controller cuts off magnetic energy regeneration switch provided and shuts down detection.Enable magnetic energy regeneration switch provided steady operation.
Described asynchronous generating parallel machine operation voltage-stabilizing system also comprises interchange cutout, the one end exchanging cutout is connected with asynchronous generator, the other end is connected with micro-capacitance sensor, receive the instruction that controller sends simultaneously, perform the disconnection or closed exchanging cutout, thus control the input quantity of asynchronous generator, when the reduction of micro-capacitance sensor frequency, invariable, rising, controller then sends the input amount that corresponding instruction increases, keeps and reduce asynchronous generating unit respectively, interchange cutout closes, and asynchronous generating unit puts into operation.By controlling the operation quantity of asynchronous generating unit, improve system effectiveness, thus safeguards system is stablized.
Another object of the present invention, is realized by following technical scheme:
A kind of asynchronous generating parallel machine operation method for stabilizing voltage, comprises the step of following order:
(1) voltage sampling apparatus one in signal sampling module, current sampling device one are sampled to micro-capacitance sensor two-route wire voltage, three road phase currents, and corresponding signal are transferred to controller respectively;
(2) controller is analyzed micro-capacitance sensor two-route wire voltage signal, micro-capacitance sensor three road phase current signal, is processed: when micro-capacitance sensor two-route wire voltage drop, be judged as that micro-capacitance sensor load increases, controller controls the capacitive reactive power increase that magnetic energy regeneration switch provided exports, idle with the perception of balance sysmte; When micro-capacitance sensor two-route wire voltage rise, be judged as that the load of micro-capacitance sensor reduces, controller controls the capacitive reactive power reduction that magnetic energy regeneration switch provided exports, and with capacitive reactive power superfluous in minimizing system, reaches the object of the voltage stabilization maintaining micro-capacitance sensor thus.
The method for stabilizing voltage of described asynchronous generating parallel machine operation, specifically comprises the step of following order:
(1) voltage sampling apparatus one in signal sampling module, current sampling device one are sampled to micro-capacitance sensor two-route wire voltage, three road phase currents, and corresponding signal are transferred to controller respectively;
(2) controller is analyzed the micro-capacitance sensor two-route wire voltage signal received, micro-capacitance sensor three road phase current signal, is processed: when micro-capacitance sensor two-route wire voltage drop, be judged as that micro-capacitance sensor load increases, controller controls the capacitive reactive power increase that magnetic energy regeneration switch provided exports, idle with the perception of balance sysmte; When micro-capacitance sensor two-route wire voltage rise, be judged as that the load of micro-capacitance sensor reduces, controller controls the capacitive reactive power reduction that magnetic energy regeneration switch provided exports, with capacitive reactive power superfluous in minimizing system;
Wherein magnetic energy regeneration switch provided is connected by △ shape head and the tail successively by three groups of single-phase magnetic energy regeneration switch provided unit, and the three-phase wire of access micro-capacitance sensor in parallel, wherein single-phase magnetic energy regeneration switch provided unit comprises a reactor, a direct current capacitor and four insulated gate bipolar transistors, and four insulated gate bipolar transistors press full-bridge type connection, connect with after Capacitance parallel connection with reactor again;
(3) voltage sampling apparatus two in signal sampling module, current sampling device two are sampled to the capacitance voltage signal of magnetic energy regeneration switch provided, current signal, and corresponding signal are transferred to controller respectively;
(4) controller is analyzed the capacitance voltage signal of magnetic energy regeneration switch provided received, current signal, is processed:
When the capacitance overvoltage of single-phase magnetic energy regeneration switch provided unit, first controller sends signal and turns off insulated gate bipolar transistor on two brachium pontis, then discharged by the insulated gate bipolar transistor of capacitance overvoltage protective device, when the electric capacity of single-phase magnetic energy regeneration switch provided unit is at zone of reasonableness, controller then according to phase place, the amplitude operation result to line voltage, carries out parameter optimization and selection;
To size of current I and the rated current I of magnetic energy regeneration switch provided
maxcompare: if I
max<I<2I
max, then controller sends corresponding signal by reducing the phase shifting angle β of micro-capacitance sensor voltage or increasing magnetic energy regeneration switch provided minimum capacity voltage V
c-minreduce electric current I, if I>2I
max, then controller cuts off magnetic energy regeneration switch provided and shuts down detection, if I<I
max, controller then according to phase place, the amplitude operation result to micro-capacitance sensor voltage, carries out parameter optimization and selection;
(5) when the load of micro-capacitance sensor is excessive, controller controls to exchange cutout and closes, and asynchronous generating unit puts into operation, and the output definite value exciting capacity in parallel of asynchronous generating unit makes output voltage reach rated value.
The method for stabilizing voltage of described asynchronous generating parallel machine operation, when the electric capacity of single-phase magnetic energy regeneration switch provided unit is at zone of reasonableness or I<I
maxtime, described parameter optimization and selection are specially: establish a parameter optimization table by the operation characteristic of magnetic energy regeneration switch provided, the phase shifting angle β of each group voltage error signal and the corresponding one group of controling parameters micro-capacitance sensor voltage of reactive power signals and magnetic energy regeneration switch provided minimum capacity voltage V
c-min, controller is according to the phase place to micro-capacitance sensor voltage, amplitude operation result, and control parameters optimization table adjusts parameter, reaches the object of optimization.Its objective is restriction harmonic wave and capacitance voltage, also make the working range of magnetic energy regeneration switch provided broaden.
Compared with prior art, tool has the following advantages and beneficial effect in the present invention:
A, continuously changing of equivalent exciting capacity size can be realized, can change along with the change at random of load, line voltage can be followed the tracks of fast, effectively can prevent Voltage Drop, thus ensure that asynchronous generating unit keeps stable operation, and there is larger excursion.
B, very favourable to the parallel running of asynchronous generating unit, it can realize continuous reactive power and control, and is very easy to realize, and structure is simple, stable performance, and the reliability for electrical network voltage stabilizing is very high.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of asynchronous generating parallel machine operation of the present invention voltage-stabilizing system;
Fig. 2 is the partial enlarged drawing of the magnetic energy regeneration switch provided of system described in Fig. 1;
Fig. 3 is the partial enlarged drawing of the controller of system described in Fig. 1;
Fig. 4 is a kind of asynchronous generating parallel machine operation of the present invention method for stabilizing voltage flow chart.
Embodiment
As Fig. 1,2,3, a kind of asynchronous generating parallel machine operation voltage-stabilizing system, comprises signal sampling module 1, controller 2, magnetic energy regeneration switch provided 3, exchanges cutout 4, wherein
Signal sampling module 1, comprise voltage sampling apparatus 1, current sampling device 1, voltage sampling apparatus 2 103, current sampling device 2 104, one end of voltage sampling apparatus 1 is connected with micro-capacitance sensor, sampling micro-capacitance sensor two-route wire voltage signal, and line voltage signal is transferred to the controller 2 be connected with its other end; One end of current sampling device 1 is connected with micro-capacitance sensor, sampling micro-capacitance sensor three road phase current signal, and phase current signal is transferred to the controller 2 be connected with its other end; One end of voltage sampling apparatus 2 103 is connected with magnetic energy regeneration switch provided 3, the capacitance voltage signal of sampling magnetic energy regeneration switch provided 3, and by capacitance voltage Signal transmissions to the controller 2 be connected with its other end; One end of current sampling device 2 104 is connected with magnetic energy regeneration switch provided 3, the current signal of sampling magnetic energy regeneration switch provided 3, and by current signal transfer to the controller 2 be connected with its other end;
Controller 2, the current signal of the micro-capacitance sensor two-route wire voltage signal that Received signal strength sampling module 1 sends, micro-capacitance sensor three road phase current signal, magnetic energy regeneration switch provided 3, and signal is analyzed, process, send corresponding instruction:
When micro-capacitance sensor load increases, micro-capacitance sensor two-route wire voltage drop, controller 2 controls the capacitive reactive power increase that magnetic energy regeneration switch provided 3 exports, idle with the perception of balance sysmte; When the load of micro-capacitance sensor reduces, micro-capacitance sensor two-route wire voltage rise, controller 2 controls the capacitive reactive power reduction that magnetic energy regeneration switch provided 3 exports, and with capacitive reactive power superfluous in minimizing system, reaches the object of the voltage stabilization maintaining micro-capacitance sensor thus;
After controller 2 receives the capacitance voltage signal of magnetic energy regeneration switch provided 3, when the capacitance overvoltage of single-phase magnetic energy regeneration switch provided unit 5, first controller 2 sends signal and turns off insulated gate bipolar transistor on two brachium pontis, then discharged by the insulated gate bipolar transistor of capacitance overvoltage protective device, when the electric capacity of single-phase magnetic energy regeneration switch provided unit 5 is at zone of reasonableness, controller then according to phase place, the amplitude operation result to line voltage, carries out parameter optimization and selection;
After controller 2 receives the current signal of magnetic energy regeneration switch provided 3, by its size I and rated current I
maxcompare: if I
max<I<2I
max, then controller 2 sends corresponding signal by reducing the phase shifting angle β of micro-capacitance sensor voltage or increasing magnetic energy regeneration switch provided minimum capacity voltage V
c-minreduce electric current I, if I>2I
max, then controller 2 cuts off magnetic energy regeneration switch provided 3 and shuts down detection, if I<I
max, controller 2 bases, to phase place, the amplitude operation result of micro-capacitance sensor voltage, carry out parameter optimization and selection;
Magnetic energy regeneration switch provided 3, its one end is connected with micro-capacitance sensor, the other end is connected with controller 2, receive the instruction that controller 2 sends, increase according to instruction or reduce the capacitive reactive power of output, magnetic energy regeneration switch provided 3 is connected by △ shape head and the tail successively by three groups of single-phase magnetic energy regeneration switch provided unit 5, and the three-phase wire of access micro-capacitance sensor in parallel, wherein single-phase magnetic energy regeneration switch provided unit 5 comprises a reactor L, a direct current capacitor C and four insulated gate bipolar transistor U, V, X, Y, and four insulated gate bipolar transistors press full-bridge type connection, connect with reactor L again with after electric capacity C parallel connection, each single-phase magnetic energy regeneration switch provided unit 5 also comprises capacitance overvoltage protective device, as Fig. 2, after being connected by an insulated gate bipolar transistor T and resistance R and electric capacity C be formed in parallel, and the collector electrode of insulated gate bipolar transistor is connected with electric capacity C positive pole, emitter is connected with electric capacity C negative pole,
Exchange cutout 4, the one end exchanging cutout 4 is connected with asynchronous generator, the other end is connected with micro-capacitance sensor, receive the instruction that controller 2 sends simultaneously, perform the disconnection or closed exchanging cutout 4, thus control the input quantity of asynchronous generator, when the reduction of micro-capacitance sensor frequency, invariable, rising, controller then sends the input amount that corresponding instruction increases, keeps and reduce asynchronous generating unit respectively, and exchange cutout 4 and close, asynchronous generating unit puts into operation.
In order to make asynchronous generating unit output voltage reach rated value, make micro-capacitance sensor voltage stabilization further, the output definite value exciting capacity 6 in parallel of asynchronous generating unit.
As Fig. 3, described controller 2 comprises micro-capacitance sensor phase/frequency monitoring means 7, signal generator 8, coordinate converter 9, pi controller 10, integrator 11, proportional amplifier 12, adder 13, proportional integrator 14, amplitude limiter 15, Optimization about control parameter unit 16 and overvoltage/over-current detection unit 17, signal Uab, Ubc, Ia, Ib, Ic of sampling are transferred to micro-capacitance sensor phase/frequency monitoring means 7 by voltage sampling apparatus 1, current sampling device 1, and the signal processed by analysis is input to signal generator 8 by micro-capacitance sensor phase/frequency monitoring means 7; Meanwhile, micro-capacitance sensor phase/frequency monitoring means 7, by two-route wire voltage signal input coordinate converter 9, makes three phase static coordinate be transformed to two cordic phase rotators, the signal U of output
dafter pi controller 10 with integrator 11, obtain grid voltage phase-angle θ, then using the position angle of θ as coordinate converter 9 and the fixed phase of signal generator 8; Meanwhile, the output signal U of coordinate converter 9
qas variable and reference signal U after proportional amplifier 12 amplifies
refask poor by adder 13, after proportional integrator 14 and amplitude limiter 15 are carried out to error signal, input control parameter optimization unit 16, through the optimum choice to parameter, by the phase shifting angle β of Optimal Control parameter micro-capacitance sensor voltage and magnetic energy regeneration switch provided minimum capacity voltage V
c-mingive signal generator 8; Simultaneously; signal Vc-r, Vc-s, Vc-t, Ir, Is, It of the sampling of voltage sampling apparatus 2 103, current sampling device 2 104 are input in signal generator 8 after overvoltage/over-current detection unit 17; after signal generator 8 carries out guard signal judgement, frequency and on off state computing successively, output switch magnetic energy regeneration switch provided control signal, protecting control signal and unit switching signal respectively.
A kind of asynchronous generating parallel machine operation method for stabilizing voltage, as 4, comprises the step of following order:
(1) voltage sampling apparatus 1 in signal sampling module 1, current sampling device 1 are sampled to micro-capacitance sensor two-route wire voltage, three road phase currents, and corresponding signal are transferred to controller 2 respectively;
(2) controller 2 is analyzed the micro-capacitance sensor two-route wire voltage signal received, micro-capacitance sensor three road phase current signal, is processed: when micro-capacitance sensor two-route wire voltage drop, be judged as that micro-capacitance sensor load increases, controller 2 controls the capacitive reactive power increase that magnetic energy regeneration switch provided exports, idle with the perception of balance sysmte; When micro-capacitance sensor two-route wire voltage rise, be judged as that the load of micro-capacitance sensor reduces, controller 2 controls the capacitive reactive power reduction that magnetic energy regeneration switch provided 3 exports, with capacitive reactive power superfluous in minimizing system;
Wherein magnetic energy regeneration switch provided 3 is connected by △ shape head and the tail successively by three groups of single-phase magnetic energy regeneration switch provided unit 5, and the three-phase wire of access micro-capacitance sensor in parallel, wherein single-phase magnetic energy regeneration switch provided unit 5 comprises a reactor L, direct current capacitor C and four insulated gate bipolar transistor U, V, X, a Y, and four insulated gate bipolar transistors U, V, X, Y press full-bridge type connection, connect with after electric capacity C parallel connection with reactor L again;
(3) voltage sampling apparatus 2 103 in signal sampling module, current sampling device 2 104 are sampled to the capacitance voltage signal of magnetic energy regeneration switch provided 3, current signal, and corresponding signal are transferred to controller respectively;
(4) controller 2 is analyzed the capacitance voltage signal of magnetic energy regeneration switch provided 3 received, current signal, is processed:
When the capacitance overvoltage of single-phase magnetic energy regeneration switch provided unit 5, first controller 2 sends signal and turns off insulated gate bipolar transistor on two brachium pontis, then discharged by the insulated gate bipolar transistor T of capacitance overvoltage protective device, when the electric capacity of single-phase magnetic energy regeneration switch provided unit 5 is at zone of reasonableness, controller 2 bases are to the phase place of micro-capacitance sensor voltage, amplitude operation result, carry out parameter optimization and selection: establish a parameter optimization table by the operation characteristic of magnetic energy regeneration switch provided 3, the phase shifting angle β of each group voltage error signal and the corresponding one group of controling parameters micro-capacitance sensor voltage of reactive power signals and magnetic energy regeneration switch provided 3 minimum capacity voltage V
c-min, controller 2 is according to the phase place to micro-capacitance sensor voltage, amplitude operation result, and control parameters optimization table adjusts parameter, reaches the object of optimization,
To size of current I and the rated current I of magnetic energy regeneration switch provided 3
maxcompare: if I
max<I<2I
max, then controller 2 sends corresponding signal by reducing the phase shifting angle β of micro-capacitance sensor voltage or increasing magnetic energy regeneration switch provided 3 minimum capacity voltage V
c-minreduce electric current I, if I>2I
max, then controller cuts off magnetic energy regeneration switch provided and shuts down detection, if I<I
maxcontroller is then according to phase place, the amplitude operation result to micro-capacitance sensor voltage, carry out parameter optimization and selection: establish a parameter optimization table by the operation characteristic of magnetic energy regeneration switch provided, the phase shifting angle β of each group voltage error signal and the corresponding one group of controling parameters micro-capacitance sensor voltage of reactive power signals and magnetic energy regeneration switch provided minimum capacity voltage V
c-min, controller is according to the phase place to micro-capacitance sensor voltage, amplitude operation result, and control parameters optimization table adjusts parameter, reaches the object of optimization;
(5) when the load of micro-capacitance sensor is excessive, mains frequency f is less than rated frequency f
ref, controller controls to exchange cutout and closes, and increases the quantity that asynchronous generating unit puts into operation; When the load of micro-capacitance sensor is less, mains frequency f is greater than rated frequency f
ref, controller controls to exchange cutout and disconnects, and reduces the quantity that asynchronous generating unit puts into operation; The output of asynchronous generating unit definite value exciting capacity in parallel makes output voltage can reach rated value very soon simultaneously.
Wherein MERS is the english abbreviation of magnetic energy regeneration switch provided 3.
Above-described embodiment is the present invention's preferably execution mode; but embodiments of the present invention are not restricted to the described embodiments; change, the modification done under other any does not deviate from Spirit Essence of the present invention and principle, substitute, combine, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (8)
1. an asynchronous generating parallel machine operation voltage-stabilizing system, is characterized in that: comprise signal sampling module, controller, magnetic energy regeneration switch provided, wherein
Signal sampling module, comprise voltage sampling apparatus one, current sampling device one, one end of voltage sampling apparatus one is connected with micro-capacitance sensor, sampling micro-capacitance sensor two-route wire voltage signal, and line voltage signal is transferred to the controller be connected with its other end; One end of current sampling device one is connected with micro-capacitance sensor, sampling micro-capacitance sensor three road phase current signal, and phase current signal is transferred to the controller be connected with its other end;
Controller, micro-capacitance sensor two-route wire voltage signal, micro-capacitance sensor three road phase current signal that Received signal strength sampling module sends, and signal is analyzed, process, send corresponding instruction: when micro-capacitance sensor load increases, micro-capacitance sensor two-route wire voltage drop, controller controls the capacitive reactive power increase that magnetic energy regeneration switch provided exports, idle with the perception of balance sysmte; When the load of micro-capacitance sensor reduces, micro-capacitance sensor two-route wire voltage rise, controller controls the capacitive reactive power reduction that magnetic energy regeneration switch provided exports, and with capacitive reactive power superfluous in minimizing system, reaches the object of the voltage stabilization maintaining micro-capacitance sensor thus;
Magnetic energy regeneration switch provided, its one end is connected with micro-capacitance sensor, and the other end is connected with controller, receives the instruction that controller sends, and increases or reduce the capacitive reactive power of output according to instruction;
Described magnetic energy regeneration switch provided is connected by △ shape head and the tail successively by three groups of single-phase magnetic energy regeneration switch provided unit, and the three-phase wire of access micro-capacitance sensor in parallel, wherein single-phase magnetic energy regeneration switch provided unit comprises a reactor, a direct current capacitor and four insulated gate bipolar transistors, and four insulated gate bipolar transistors press full-bridge type connection, connect with after Capacitance parallel connection with reactor again.
2. asynchronous generating parallel machine operation voltage-stabilizing system according to claim 1; it is characterized in that; described single-phase magnetic energy regeneration switch provided unit also comprises capacitance overvoltage protective device; form with Capacitance parallel connection by after an insulated gate bipolar transistor and a resistant series; and the collector electrode of insulated gate bipolar transistor is connected with capacitance cathode, emitter is connected with electric capacity negative pole.
3. asynchronous generating parallel machine operation voltage-stabilizing system according to claim 1, it is characterized in that, described signal sampling module also comprises voltage sampling apparatus two, one end of voltage sampling apparatus two is connected with magnetic energy regeneration switch provided, the capacitance voltage signal of sampling magnetic energy regeneration switch provided, and by capacitance voltage Signal transmissions to the controller be connected with its other end.
4. asynchronous generating parallel machine operation voltage-stabilizing system according to claim 1, it is characterized in that, described signal sampling module also comprises current sampling device two, one end of current sampling device two is connected with magnetic energy regeneration switch provided, the current signal of sampling magnetic energy regeneration switch provided, and by current signal transfer to the controller that is connected with its other end, after controller receives the current signal that current sampling device two sends, by its size I and rated current I
maxcompare: if I
max<I<2I
max, then controller sends corresponding signal by reducing the phase shifting angle β of micro-capacitance sensor voltage or increasing magnetic energy regeneration switch provided minimum capacity voltage V
c-minreduce electric current I, if I>2I
max, then controller cuts off magnetic energy regeneration switch provided and shuts down detection.
5. asynchronous generating parallel machine operation voltage-stabilizing system according to claim 1, it is characterized in that, it also comprises interchange cutout, the one end exchanging cutout is connected with asynchronous generator, the other end is connected with micro-capacitance sensor, receive the instruction that controller sends simultaneously, perform the disconnection or closed exchanging cutout, thus control the input quantity of asynchronous generator, when micro-capacitance sensor frequency reduces, invariable, raise, controller then sends corresponding instruction and increases respectively, keep and reduce the input amount of asynchronous generating unit, interchange cutout closes, asynchronous generating unit puts into operation.
6. an asynchronous generating parallel machine operation method for stabilizing voltage, comprises the step of following order:
(1) voltage sampling apparatus one in signal sampling module, current sampling device one are sampled to micro-capacitance sensor two-route wire voltage, three road phase currents, and corresponding signal are transferred to controller respectively;
(2) controller is analyzed micro-capacitance sensor two-route wire voltage signal, micro-capacitance sensor three road phase current signal, is processed: when micro-capacitance sensor two-route wire voltage drop, be judged as that micro-capacitance sensor load increases, controller controls the capacitive reactive power increase that magnetic energy regeneration switch provided exports, idle with the perception of balance sysmte; When micro-capacitance sensor two-route wire voltage rise, be judged as that the load of micro-capacitance sensor reduces, controller controls the capacitive reactive power reduction that magnetic energy regeneration switch provided exports, and with capacitive reactive power superfluous in minimizing system, reaches the object of the voltage stabilization maintaining micro-capacitance sensor thus;
Wherein magnetic energy regeneration switch provided is connected by △ shape head and the tail successively by three groups of single-phase magnetic energy regeneration switch provided unit, and the three-phase wire of access micro-capacitance sensor in parallel, wherein single-phase magnetic energy regeneration switch provided unit comprises a reactor, a direct current capacitor and four insulated gate bipolar transistors, and four insulated gate bipolar transistors press full-bridge type connection, connect with after Capacitance parallel connection with reactor again.
7. asynchronous generating parallel machine operation method for stabilizing voltage according to claim 6, is characterized in that, specifically comprise the step of following order:
(1) voltage sampling apparatus one in signal sampling module, current sampling device one are sampled to micro-capacitance sensor two-route wire voltage, three road phase currents, and corresponding signal are transferred to controller respectively;
(2) controller is analyzed the micro-capacitance sensor two-route wire voltage signal received, micro-capacitance sensor three road phase current signal, is processed: when micro-capacitance sensor two-route wire voltage drop, be judged as that micro-capacitance sensor load increases, controller controls the capacitive reactive power increase that magnetic energy regeneration switch provided exports, idle with the perception of balance sysmte; When micro-capacitance sensor two-route wire voltage rise, be judged as that the load of micro-capacitance sensor reduces, controller controls the capacitive reactive power reduction that magnetic energy regeneration switch provided exports, with capacitive reactive power superfluous in minimizing system;
Wherein magnetic energy regeneration switch provided is connected by △ shape head and the tail successively by three groups of single-phase magnetic energy regeneration switch provided unit, and the three-phase wire of access micro-capacitance sensor in parallel, wherein single-phase magnetic energy regeneration switch provided unit comprises a reactor, a direct current capacitor and four insulated gate bipolar transistors, and four insulated gate bipolar transistors press full-bridge type connection, connect with after Capacitance parallel connection with reactor again;
(3) voltage sampling apparatus two in signal sampling module, current sampling device two are sampled to the capacitance voltage signal of magnetic energy regeneration switch provided, current signal, and corresponding signal are transferred to controller respectively;
(4) controller is analyzed the capacitance voltage signal of magnetic energy regeneration switch provided received, current signal, is processed:
When the capacitance overvoltage of single-phase magnetic energy regeneration switch provided unit, first controller sends signal and turns off insulated gate bipolar transistor on two brachium pontis, then discharged by the insulated gate bipolar transistor of capacitance overvoltage protective device, when the electric capacity of single-phase magnetic energy regeneration switch provided unit is at zone of reasonableness, controller then according to phase place, the amplitude operation result to line voltage, carries out parameter optimization and selection;
To size of current I and the rated current I of magnetic energy regeneration switch provided
maxcompare: if I
max<I<2I
max, then controller sends corresponding signal by reducing the phase shifting angle β of micro-capacitance sensor voltage or increasing magnetic energy regeneration switch provided minimum capacity voltage V
c-minreduce electric current I, if I>2I
max, then controller cuts off magnetic energy regeneration switch provided and shuts down detection, if I<I
max, controller then according to phase place, the amplitude operation result to micro-capacitance sensor voltage, carries out parameter optimization and selection;
(5) when the load of micro-capacitance sensor is excessive, controller controls to exchange cutout and closes, and asynchronous generating unit puts into operation, and the output definite value exciting capacity in parallel of asynchronous generating unit makes output voltage reach rated value.
8. asynchronous generating parallel machine operation method for stabilizing voltage according to claim 7, is characterized in that, when the electric capacity of single-phase magnetic energy regeneration switch provided unit is at zone of reasonableness or I<I
maxtime, described parameter optimization and selection are specially: establish a parameter optimization table by the operation characteristic of magnetic energy regeneration switch provided, the phase shifting angle β of each group voltage error signal and the corresponding one group of controling parameters micro-capacitance sensor voltage of reactive power signals and magnetic energy regeneration switch provided minimum capacity voltage V
c-min, controller is according to the phase place to micro-capacitance sensor voltage, amplitude operation result, and control parameters optimization table adjusts parameter, reaches the object of optimization.
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| CN108390601B (en) * | 2018-01-27 | 2020-12-11 | 无锡法尔胜悦能动力有限公司 | Intelligent control system and control method for asynchronous diesel generator set |
| RU2726949C1 (en) * | 2019-10-09 | 2020-07-17 | федеральное государственное бюджетное образовательное учреждение высшего образования "Национальный исследовательский университет "МЭИ" (ФГБОУ ВО "НИУ "МЭИ") | Asynchronous generator voltage automatic regulation and stabilization device |
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