CN103777089A - Auxiliary inverter model selection platform - Google Patents
Auxiliary inverter model selection platform Download PDFInfo
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- CN103777089A CN103777089A CN201210414293.9A CN201210414293A CN103777089A CN 103777089 A CN103777089 A CN 103777089A CN 201210414293 A CN201210414293 A CN 201210414293A CN 103777089 A CN103777089 A CN 103777089A
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Abstract
The invention provides an auxiliary inverter model selection platform which comprises a simulating DC input module, a simulating DC voltage-stabilizing module, a simulating inverter module, a simulating load module, and an output module which are connected successively. The simulating DC input module comprises a simulating voltage amplitude input end, a simulating pulse input end, an adder, and a simulating controllable voltage source. The simulating voltage amplitude input end and the simulating pulse input end are connected with the input end of the adder. The output end of the adder is connected with the simulating controllable voltage source. The simulating controllable voltage source is connected with the simulating DC voltage-stabilizing module. The auxiliary inverter model selection platform provided by the invention may prevent design faults caused by a fact that electrical component parameters are selected simply on the basis of theoretical calculation and experience, and reworkng and waste in a design process.
Description
Technical field
The present invention relates to electrical technology, relate in particular to a kind of subordinate inverter type selecting platform.
Background technology
The DC inverter that subordinate inverter provides contact net becomes 3 cross streams electricity, for vehicle consumer is as warm in air-conditioning, electricity, cooling system etc. provides stable power supply.Subordinate inverter main circuit electrical equipment is more, and design is comparatively complicated.At present, in design process, normally carry out the parameter of each electrical equipment in selecting circuit according to theory calculating and research staff's experience.
But, the theoretical value calculating with formula often has larger difference with the actual device parameter values using, easily cause design error, be not easy to design, and experience varies with each individual especially, this just causes the global design of subordinate inverter main circuit lack of standardization, and even may design the final output waveform of rear discovery subordinate inverter and the output waveform of anticipation has bigger difference, causes rejection and waste.
Summary of the invention
The invention provides a kind of subordinate inverter type selecting platform, to avoid only choosing according to theory calculating and experience the design error that electrical equipment parameter causes.
The invention provides a kind of subordinate inverter type selecting platform, comprising: the emulation direct current load module, emulation DC voltage-stabilizing module, emulation inversion module, dummy load module and the output module that connect successively; Described emulation direct current load module comprises: emulation voltage magnitude input end, emulation pulse input end, superimposer and emulation controllable voltage source, described emulation voltage magnitude input end is connected with the input end of described superimposer with described emulation pulse input end, the output terminal of described superimposer is connected with described emulation controllable voltage source, and described emulation controllable voltage source is connected with described emulation DC voltage-stabilizing module.
Further, above-mentioned subordinate inverter type selecting platform, described emulation DC voltage-stabilizing module comprises: the adjustable emulation charging resistor, adjustable emulation smoothing reactor and the adjustable emulation resistance capacity filter that connect successively; Described emulation charging resistor is connected with described emulation controllable voltage source, and described emulation resistance capacity filter is connected with described emulation inversion module.
Further, above-mentioned subordinate inverter type selecting platform, described emulation inversion module comprises: the adjustable emulation bridge circuit, adjustable emulation LC wave filter and the adjustable emulation transformer that connect successively; Described emulation bridge circuit is connected with described adjustable emulation resistance capacity filter, and described adjustable emulation transformer is connected with described dummy load module.
Further, above-mentioned subordinate inverter type selecting platform, the load of described dummy load module is tunable load.
Further, described in above-mentioned subordinate inverter type selecting platform, output module comprises simulation result display unit.
Subordinate inverter type selecting platform provided by the invention, the direct-flow input circuit, direct current regulation circuit, three-phase inverting circuit and the three-phase load circuit that in the subordinate inverter main circuit of emulation direct current load module by connecting successively, emulation DC voltage-stabilizing module, emulation inversion module, dummy load module simulation reality, connect successively, realize the emulation to subordinate inverter circuit; In emulation direct current load module, by the signal stack that uses superimposer that emulation voltage magnitude input end and emulation pulse input end are inputted, amplitude and the waveform of simulation actual electric network voltage, then by emulation controllable voltage source, above-mentioned amplitude and waveform are converted into the voltage signal that can be identified by other emulation electrical modules; By being connected of emulation controllable voltage source and emulation DC voltage-stabilizing module, realizing the mains voltage signal of above-mentioned simulation is input to this subordinate inverter type selecting platform; Realize the observation to output waveform by output module, designer can contrast the output waveform of this output waveform and anticipation and judge, therefore this platform can just provide selection ground intuitively to designer at the front end of design, thereby avoids rejection and waste.
Accompanying drawing explanation
Fig. 1 is the structural representation of subordinate inverter type selecting platform embodiment mono-of the present invention;
Fig. 2 is the schematic diagram that the emulation direct current load module of Fig. 1 uses the device of SimPowerSystems module library to build;
Fig. 3 is the structural representation of subordinate inverter type selecting platform embodiment bis-of the present invention;
Fig. 4 is the schematic diagram that the emulation DC voltage-stabilizing module of Fig. 3 is used the device of SimPowerSystems module library to build;
Fig. 5 is the voltage schematic diagram after the voltage stabilizing of DC voltage-stabilizing module that utilizes the first group of parameters simulation of subordinate inverter type selecting platform selecting shown in Fig. 3 to obtain;
Fig. 6 is the voltage schematic diagram after the voltage stabilizing of DC voltage-stabilizing module that utilizes the second group of parameters simulation of subordinate inverter type selecting platform selecting shown in Fig. 3 to obtain;
Fig. 7 is the structural representation of subordinate inverter type selecting platform embodiment tri-of the present invention;
Fig. 8 is the schematic diagram that the emulation inversion module of Fig. 7 uses the device of SimPowerSystems module library to build;
Fig. 9 is that in the emulation inversion module of Fig. 7, LC wave filter is output voltage and the output current schematic diagram of 0.382mH/60 μ F/ △ type while connecting;
Figure 10 is that in the emulation inversion module of Fig. 7, LC wave filter is output voltage and the output current schematic diagram of 0.6mH/20 μ F/Y type while connecting;
Figure 11 is the structural representation of subordinate inverter type selecting platform embodiment tetra-of the present invention;
Figure 12 is the dummy load module of Figure 11 and the schematic diagram that output module uses the device of SimPowerSystems module library to build;
Figure 13 is the input/output relation schematic diagram of a control program embodiment of Figure 11.
Embodiment
Fig. 1 is the structural representation of subordinate inverter type selecting platform embodiment mono-of the present invention, as shown in Figure 1, the subordinate inverter type selecting platform of the present embodiment can comprise: the emulation direct current load module 1, emulation DC voltage-stabilizing module 2, emulation inversion module 3, dummy load module 4 and the output module 5 that connect successively; Wherein, emulation direct current load module 1 can comprise: emulation voltage magnitude input end 11, emulation pulse input end 12, superimposer 13 and emulation controllable voltage source 14, emulation voltage magnitude input end 11 is connected with the input end of superimposer 13 with emulation pulse input end 12, the output terminal of superimposer 13 is connected with emulation controllable voltage source 14, and emulation controllable voltage source 14 is connected with emulation DC voltage-stabilizing module 2.
When specific implementation, each electrical equipment in the subordinate inverter type selecting platform of the present embodiment can use the SimPowerSystems module library device in Matlab, and according to the parameter of the selection setting corresponding device of the parameter of each electrical equipment of subordinate inverter designing in advance, so that the emulation to certain design.The used instrument of setting for this platform can be also other instruments, only illustrates herein, is not limited.According to the circuit structure shown in Fig. 1, Fig. 2 is the schematic diagram that the emulation direct current load module of Fig. 1 uses the device of SimPowerSystems module library to build, as shown in Figure 2, this circuit uses Constant as emulation voltage magnitude input end 11, use Repeating Sequence as emulation pulse input end 12, use add module as superimposer 13, use Controlled Voltage Source emulation controllable voltage source 14.The amplitude of the given DC voltage of writing direct in Constant, for example 1000V, this voltage magnitude can be according to the line voltage adjustment of actual requirement.Can set as required waveform at Repeating Sequence, for example, according to on-the-spot grid voltage waveform, or the wave setting of the line voltage that may occur sudden change so that in the platform of the present embodiment analog voltage impact variation.The output signal of Constant and RepeatingSequence is the synthetic input voltage set-point that forms after add module, then is converted into through Controlled Voltage Source the voltage signal that can be identified by other electrical modules.Controlled Voltage Source is connected with emulation DC voltage-stabilizing module 2, to complete the emulation of direct current input.
In addition, in practical operation, for the ease of designer's observation and analysis, the voltage given value after add module can being synthesized detects by detecting components and parts, and its waveform is shown to Ud_in as shown in Figure 2.
The present embodiment, the direct-flow input circuit, direct current regulation circuit, three-phase inverting circuit and the three-phase load circuit that in the subordinate inverter main circuit of emulation direct current load module by connecting successively, emulation DC voltage-stabilizing module, emulation inversion module, dummy load module simulation reality, connect successively, realize the emulation to subordinate inverter circuit; In emulation direct current load module, by the signal stack that uses superimposer that emulation voltage magnitude input end and emulation pulse input end are inputted, amplitude and the waveform of simulation actual electric network voltage, then by emulation controllable voltage source, above-mentioned amplitude and waveform are converted into the voltage signal that can be identified by other emulation electrical modules; By being connected of emulation controllable voltage source and emulation DC voltage-stabilizing module, realizing the mains voltage signal of above-mentioned simulation is input to this subordinate inverter type selecting platform; Realize the observation to output waveform by output module, designer can contrast the output waveform of this output waveform and anticipation and judge, therefore this platform can just provide selection ground intuitively to designer at the front end of design, thereby avoids rejection and waste.
Fig. 3 is the structural representation of subordinate inverter type selecting platform embodiment bis-of the present invention, as shown in Figure 3, the subordinate inverter type selecting platform of the present embodiment is on the basis of Fig. 1 shown device, preferably, emulation DC voltage-stabilizing module 2 can comprise: the adjustable emulation charging resistor 21, adjustable emulation smoothing reactor 22 and the adjustable emulation resistance capacity filter 23 that connect successively; Emulation charging resistor 21 is connected with emulation controllable voltage source 14, and emulation resistance capacity filter 23 is connected with emulation inversion module 3.
When specific implementation, the subordinate inverter type selecting platform of the present embodiment for example also uses the SimPowerSystems module library device in Matlab, Fig. 4 is the schematic diagram that the emulation DC voltage-stabilizing module of Fig. 3 is used the device of SimPowerSystems module library to build, as shown in Figure 4, this main circuit will use Series RLC Branch module to set up, by changing Series RLC Branch, can make it simulate respectively adjustable emulation charging resistor 21, adjustable emulation smoothing reactor 22 and adjustable emulation resistance capacity filter 23.
In addition, in practical operation, for the ease of observing, can use and detect components and parts detection DC voltage after voltage stabilizing, as the Ud_c in Fig. 4.In order to make simulated effect better, designer writes corresponding control program according to demand simultaneously, and Ud_c can be used as a parameter for control program processing, and the p in Fig. 4 is the control signal of output after control program is processed.
When concrete application, as follows to the type selecting process of charging resistor:
The duration of charging of charging resistor major effect subordinate inverter, the start-up time of remote effect subordinate inverter place equipment.In Practical Project, the duration of charging determines according to field requirement, and in general, the larger duration of charging of resistance is longer, if the duration of charging is oversize, user experiences poor, if the duration of charging is too short, in circuit, electric current is excessive, will impact equipment.For example in engineering, needing the duration of charging to control is 1 second, calculates through relevant experimental formula, and can calculate charging resistor is a certain numerical value, this numerical value of subordinate inverter type selecting platform validation of available the present embodiment.In platform, adjustable emulation charging resistor 21 is set to this numerical value, in output module 5, observes output waveform, can from output waveform, obtain the duration of charging, thereby can verify that whether this numerical value is reasonable.
Type selecting process to smoothing reactor and resistance capacity filter is as follows:
The reactance of smoothing reactor and the resistance of resistance capacity filter and electric capacity, the calculated value of this group parameter and actual value difference are larger, need rule of thumb comprehensively to choose with calculating.The major function of this group parameter is the voltage stabilization that keeps power input module, prevents that the output voltage fluctuation of subordinate inverter from appearring preventing while fluctuation in output voltage fluctuation, the especially line voltage of subordinate inverter.
By setting different parameters, can draw dynamic perfromance under different condition.Suppose that net is pressed in 50ms and suddenlyd change to 1000V by 800V, in 1s, return to again 800V, can, at the subordinate inverter type selecting platform of the present embodiment, input respectively two groups of parameters, the voltage under observation different parameters after 2 voltage stabilizings of DC voltage-stabilizing module and the dynamic perfromance of output voltage.Fig. 5 is the voltage schematic diagram after the voltage stabilizing of DC voltage-stabilizing module that utilizes the first group of parameters simulation of subordinate inverter type selecting platform selecting shown in Fig. 3 to obtain, and Fig. 6 is the voltage schematic diagram after the voltage stabilizing of DC voltage-stabilizing module that utilizes the second group of parameters simulation of subordinate inverter type selecting platform selecting shown in Fig. 3 to obtain.Dynamic perfromance while observing line voltage sudden change.Comparison diagram 5 and Fig. 6, can find out, in the time that line voltage suddenlys change, the output waveform of second group of parameter is more stable, and second group of parameter be in the time that subordinate inverter is normally worked (in the time that line voltage does not suddenly change), the voltage fluctuation after 2 voltage stabilizings of DC voltage-stabilizing module is less.Therefore can consider to select second group of parameter.
The present embodiment, by the direct current regulation circuit of the adjustable emulation charging resistor connecting successively, adjustable emulation smoothing reactor and adjustable emulation resistance capacity filter simulation subordinate inverter, and by changing the parameter of above-mentioned adjustable device, observe the output waveform in output module, designer can judge whether parameter selection is reasonable, thereby is convenient to the type selecting to charging resistor, smoothing reactor, resistance capacity filter at design front end.
Fig. 7 is the structural representation of subordinate inverter type selecting platform embodiment tri-of the present invention, as shown in Figure 7, the subordinate inverter type selecting platform of the present embodiment is on the basis of Fig. 3 shown device, preferably, emulation inversion module 3 comprises: the adjustable emulation bridge circuit 31, adjustable emulation LC wave filter 32 and the adjustable emulation transformer 33 that connect successively; Emulation bridge circuit 31 is connected with adjustable emulation resistance capacity filter 23, and adjustable emulation transformer 33 is connected with dummy load module 4.
When specific implementation, in the subordinate inverter type selecting platform of the present embodiment, for example also use the SimPowerSystems module library device in Matlab, Fig. 8 is the schematic diagram that the emulation inversion module of Fig. 7 uses the device of SimPowerSystems module library to build, as shown in Figure 8, this module is used Universal Bridge, Series RLC Branch and Three-Phase Transformer module to set up.Universal Bridge is as adjustable emulation bridge circuit 31; its effect is converting direct-current voltage into alternating-current voltage; Series RLC Branch is as adjustable emulation LC wave filter 32; its effect is that UniversalBridge output is changed into sinewave output; Three-Phase Transformer is as adjustable emulation transformer 33; its effect is the isolation of the high-tension apparatus of rear end load equipment and front end, protection consumer, and provide three-phase alternating current output to load consumer.
With embodiment tri-similarly, the present embodiment also can comprise control program, the pulse in Fig. 8 be control program process after output control signal.
When concrete application, type selecting process to LC wave filter is as follows: for example line voltage 800V, rated power is 35kVA, need to select in the parameter of following two groups of LC wave filters at present, is respectively the connection of 0.382mH/60 μ F/ △ type, the connection of 0.6mH/20 μ F/Y type.Carry out respectively emulation for every group of parameter, in the subordinate inverter type selecting platform providing at the present embodiment, by adjustable emulation LC wave filter 32, be Series RLC Branch, while being set to the connection of 0.382mH/60 μ F/ △ type, as shown in Figure 9, while being set to the connection of 0.6mH/20 μ F/Y type, output voltage and output current are as shown in figure 10 for output voltage and output current.By direct observation waveform or by frequency analysis, can determine that the Waveform sine of Figure 10 is better, therefore can think that 0.6mH/20 μ F/Y type connects more reasonable.
In the time that the line voltage grade of the subordinate inverter of required design changes, the device parameters in modules also needs to do corresponding variation, and the type selecting process of the type selecting of various devices and LC wave filter is similar, does not repeat them here.Here briefly introduce in the time that the specified line voltage of design rises to the subordinate inverter of 1500V the using method of the subordinate inverter type selecting platform of the present embodiment.
Because line voltage changes, first to input new load voltage value at emulation voltage magnitude input end 11.Secondly according to the parameter of the LC wave filter in parameter and the emulation inversion module 3 of aforesaid method modification emulation direct current load module 2.Meanwhile, also need the no-load voltage ratio of adjustable emulation transformer to be made as suitable value, for example 760:380(is in the time that specified line voltage is 800V, and this value can be 380:380), to improve the utilization factor of DC voltage; And need to design suitable control program according to input voltage.
The present embodiment, by the inverter circuit in the adjustable emulation bridge circuit connecting successively, adjustable emulation LC wave filter and adjustable emulation transformer simulation subordinate inverter main circuit, and by changing the parameter of above-mentioned adjustable device, observe the output waveform in output module, designer can judge whether parameter selection is reasonable, thereby is convenient to the type selecting to bridge circuit, LC wave filter and transformer at design front end.
Figure 11 is the structural representation of subordinate inverter type selecting platform embodiment tetra-of the present invention, as shown in figure 11, the subordinate inverter type selecting platform of the present embodiment is on the basis of Fig. 7 shown device, preferably, the load of dummy load module 4 is tunable loads, and output module 5 comprises simulation result display unit 51.
When specific implementation, in the subordinate inverter type selecting platform of the present embodiment, for example also use the SimPowerSystems module library device in Matlab, Figure 12 is the dummy load module of Figure 11 and the schematic diagram that output module uses the device of SimPowerSystems module library to build, as shown in figure 12, the present embodiment can use the load of Series RLC Branch module simulation actual vehicle consumer, can detect magnitude of voltage and current value and deliver to demonstration in simulation result display unit 51.In addition, also detected value can be delivered in control program.
Figure 13 is the input/output relation schematic diagram of a control program embodiment of Figure 11, as shown in figure 13, the magnitude of voltage that control program is exported with output module 5, the magnitude of voltage Ud_c that Uuv, Uvw, Uwu and emulation DC voltage-stabilizing module 2 are exported is as input, through some control methods and mathematical operation, output control signal p and pulse, act on respectively emulation DC voltage-stabilizing module 2 and emulation inversion module 3.Control program can use s function to write, and this s function can use independent file edit, for example acu.c file.Need to modify to this control program time, can directly open acu.c file modification.Particularly, the output of control program can be exported on Wei Qi road, and 1 ~ 6 tunnel is pulse output, can gather the signal for pluse by MUX module, as the driving signal of Universal Bridge in emulation inversion module 3; An other independent pulse in road is output as p, for controlling input and the excision of charging resistor, in charging process, this signal is low, and charging resistor drops into circuit working always, plays the effect of restriction charging current, when charging process finishes, this signal is high, and charging resistor, by short circuit, does not participate in circuit working.
Further, the switching frequency of subordinate inverter also can affect output waveform, in practical engineering application, general switching frequency is higher, and the sinusoidal degree of output waveform is better, but the thermal value of subordinate inverter is also larger, be unfavorable for the stability of equipment, therefore, switching frequency also needs to select an optimal value.In the subordinate inverter type selecting platform of the present embodiment, switching frequency can be simulated by the cycle period in control program, when concrete application, can be after selected one group of electric parameter, only change switching frequency, for example, open acu.c file modification cycle period, observe Output rusults, contrast according to output waveform with anticipation waveform, selects a suitable numerical value evenly.
The present embodiment, by the dummy load module of tunable load, realizes the emulation of the subordinate inverter to there is different loads demand; By the setting of simulation result display unit, be convenient to designer and observe Output rusults.
Finally it should be noted that: above each embodiment, only in order to technical scheme of the present invention to be described, is not intended to limit; Although the present invention is had been described in detail with reference to aforementioned each embodiment, those of ordinary skill in the art is to be understood that: its technical scheme that still can record aforementioned each embodiment is modified, or some or all of technical characterictic is wherein equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.
Claims (5)
1. a subordinate inverter type selecting platform, is characterized in that, comprising: the emulation direct current load module, emulation DC voltage-stabilizing module, emulation inversion module, dummy load module and the output module that connect successively;
Described emulation direct current load module comprises: emulation voltage magnitude input end, emulation pulse input end, superimposer and emulation controllable voltage source, described emulation voltage magnitude input end is connected with the input end of described superimposer with described emulation pulse input end, the output terminal of described superimposer is connected with described emulation controllable voltage source, and described emulation controllable voltage source is connected with described emulation DC voltage-stabilizing module.
2. subordinate inverter type selecting platform according to claim 1, is characterized in that, described emulation DC voltage-stabilizing module comprises: the adjustable emulation charging resistor, adjustable emulation smoothing reactor and the adjustable emulation resistance capacity filter that connect successively;
Described emulation charging resistor is connected with described emulation controllable voltage source, and described emulation resistance capacity filter is connected with described emulation inversion module.
3. subordinate inverter type selecting platform according to claim 2, is characterized in that, described emulation inversion module comprises: the adjustable emulation bridge circuit, adjustable emulation LC wave filter and the adjustable emulation transformer that connect successively;
Described emulation bridge circuit is connected with described adjustable emulation resistance capacity filter, and described adjustable emulation transformer is connected with described dummy load module.
4. according to the subordinate inverter type selecting platform described in any one in claim 1 ~ 3, it is characterized in that, the load of described dummy load module is tunable load.
5. according to the subordinate inverter type selecting platform described in any one in claim 1 ~ 3, it is characterized in that, described output module comprises simulation result display unit.
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| CN107632589A (en) * | 2016-07-18 | 2018-01-26 | 上海申通地铁集团有限公司 | Test device and method for the auxiliary inverse controller of railcar system |
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