CN105811460A - High-frequency test system of power module for electronic power transformer - Google Patents
High-frequency test system of power module for electronic power transformer Download PDFInfo
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- CN105811460A CN105811460A CN201610290825.0A CN201610290825A CN105811460A CN 105811460 A CN105811460 A CN 105811460A CN 201610290825 A CN201610290825 A CN 201610290825A CN 105811460 A CN105811460 A CN 105811460A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/40—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
- H02M5/42—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters
- H02M5/44—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac
Abstract
The invention discloses a high-frequency test system of a power module for an electronic power transformer. The high-frequency test system comprises a sampling module, a control module and a connection circuit, wherein the sampling module is connected with a power module group in the electronic power transformer and a power grid and is used for acquiring a characteristic parameter of the power module group and phase and frequency of an AC bus voltage output from the power grid and sending the characteristic parameter, the phase and the frequency to the control module, the control module is used for judging the characteristic parameter, controlling the power module group according to a judgment result, and generating a first driving signal according to the phase and the frequency of the AC bus voltage to control the output voltage of the power module group to be maintained at same frequency and the same phase with the AC bus voltage, the connection circuit is connected with an output end of the power module group and the power grid separately and is used for feeding back the output electric energy of the power module group to the power grid, and an induction assembly is connected in series to the connection circuit. By the high-frequency test system, the output electric energy of the power module group can be fed back to the power grid, the electric energy waste is reduced, and the test cost is reduced.
Description
Technical field
The present invention relates to electronic power transformer technical field, particularly relate to a kind of power model high frequency test system for electronic power transformer.
Background technology
Electric power electric transformer (PowerElectronicTransformer, PET) is the static electrical equipment of a kind of electric energy that the electric energy of a kind of electrical nature can be changed into another kind of electrical nature, includes multiple power model with difference in functionality.
Owing to electric power electric transformer is before practical application, in order to test its performance indications, need the functional parameter of its each power model is repeatedly tested, and in test process, electric energy is constantly in the outfan consumption of the power model group of electronic power transformer, causing the significant wastage of electric energy, testing cost is high.
Therefore, how to provide a kind of can reduce waste of energy, reduce testing cost the power model high frequency test system for electronic power transformer be the problem that those skilled in the art are presently required solution.
Summary of the invention
It is an object of the invention to provide a kind of power model high frequency test system for electronic power transformer, can by the output electric energy of power model group by connection electronic feedback to electrical network, realize the recycling of electric energy as much as possible, reduce the waste of electric energy, reduce testing cost.
For solving above-mentioned technical problem, the invention provides a kind of power model high frequency test system for electronic power transformer, including:
The sampling module being connected with the power model group in described electronic power transformer and electrical network, the phase place of the ac bus voltage that the characteristic parameter and described electrical network for gathering described power model group exports and frequency also send to controlling module；
Described control module, for described characteristic parameter is judged, is controlled described power model group according to judged result；And generate the first driving signal according to the phase place of described ac bus voltage and frequency and control the output voltage of the described power model group frequency identical with described ac bus voltage maintenance and phase place；
Connect the outfan of described power model group and the connection circuit of described electrical network respectively, for by the output back electrical energy of described power model group to described electrical network；Wherein, described connection circuit is serially connected with Inductive component.
Preferably, described power model group includes:
Input rectifying filtration module, high-frequency inversion module, high frequency transformer, filtering high-frequency rectifier module and output inversion module.
Preferably, DAB translation circuit or LLC resonant type soft-switch translation circuit are included in described high frequency transformer.
Preferably, described input rectifying filtration module is that the load-side of full-bridge controlled architecture and described full-bridge controlled architecture is parallel with filter capacitor.
Preferably, described high-frequency inversion module, described filtering high-frequency rectifier module and described output inversion module adopt any one in full-bridge controlled architecture or half-bridge controlled architecture respectively.
Preferably, the reactive current of the side that described sampling module obtains the output voltage of described input rectifying filtration module, described input rectifying filtration module is connected with described electrical network and harmonic current transmission extremely described control module；
Described control module judges that whether the output voltage and first of described input rectifying filtration module gives the difference of voltage in preset range, if not existing, then adjusts the rectification parameter in described control module；
Whether the current phase of the described more described reactive current of control module is identical with voltage-phase, if differing, then adjusts the reactive-load compensation parameter in described control module；
The described more described harmonic current of control module and the size of given harmonic value, if differing, then adjust the Harmonics elimination parameter in described control module；
Described control module generates two driving signal according to the described rectification parameter after adjusting, described reactive-load compensation parameter and described Harmonics elimination parameter described input rectifying filtration module is controlled；
If the output voltage of described input rectifying filtration module gives the difference of voltage in described preset range with described first, the current phase of described reactive current is identical with voltage-phase, and described harmonic current is identical with the size of described given harmonic value, then described control module judges that described input rectifying filtration module is normal.
Preferably, described sampling module obtains the output voltage of described filtering high-frequency rectifier module and sends to described control module；
The size of the output voltage of the more described filtering high-frequency rectifier module of described control module and the second given voltage；If it is different, the phase contrast adjusted between the driving signal that described high-frequency inversion module is corresponding respectively with described filtering high-frequency rectifier module, and signal is driven to control the output voltage of described filtering high-frequency rectifier module according to adjusting result output the 3rd；If identical, then described control module judges that described filtering high-frequency rectifier module is normal.
Preferably, described control module is additionally operable to according to predeterminated frequency generation fourth drive signal, the output frequency of described high-frequency inversion module is controlled.
The invention provides a kind of power model high frequency test system for electronic power transformer, include the connection circuit that can connect electrical network respectively with the outfan of the power model group in electronic power transformer, and control module can generate the first driving signal according to the phase place of the ac bus voltage that the electrical network of sampling module collection exports and frequency, control the output voltage frequency identical with the ac bus voltage maintenance on electrical network and the phase place of power model group, it is thus possible to by the output electric energy of power model group by connection electronic feedback to electrical network, namely the present invention achieves the recycling of electric energy as much as possible, reduce the waste of electric energy, reduce testing cost.
Accompanying drawing explanation
In order to be illustrated more clearly that the technical scheme in the embodiment of the present invention, the accompanying drawing used required in prior art and embodiment will be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the premise not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the structural representation of a kind of power model high frequency test system for electronic power transformer provided by the invention；
Fig. 2 is the electrical block diagram of a kind of power model high frequency test system for electronic power transformer provided by the invention；
Fig. 3 is the circuit diagram of a kind of full-bridge controlled architecture provided by the invention；
Fig. 4 is the circuit diagram of a kind of half-bridge controlled architecture provided by the invention；
Fig. 5 is the structural representation for the high frequency transformer in the power model high frequency test system of electronic power transformer provided by the invention (including DAB translation circuit)；
Fig. 6 is the structural representation for the high frequency transformer in the power model high frequency test system of electronic power transformer provided by the invention (including LLC resonant type soft-switch translation circuit).
Detailed description of the invention
The core of the present invention is to provide a kind of power model high frequency test system for electronic power transformer, can by the output electric energy of power model group by connection electronic feedback to electrical network, realize the recycling of electric energy as much as possible, reduce the waste of electric energy, reduce testing cost.
For making the purpose of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is a part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art obtain under not making creative work premise, broadly fall into the scope of protection of the invention.
The invention provides a kind of power model high frequency test system for electronic power transformer, shown in Figure 1, Fig. 1 is the structural representation of a kind of power model high frequency test system for electronic power transformer provided by the invention；This system includes:
The sampling module 13 being connected with the power model group 12 in electronic power transformer and electrical network 11, the phase place of the ac bus voltage that the characteristic parameter and electrical network 11 for gathering power model group 12 exports and frequency also send to controlling module 14；
Control module 14, for characteristic parameter is judged, according to judged result, power model group 12 is controlled；And generate the first driving signal according to the phase place of ac bus voltage and frequency and control the output voltage of power model group 12 frequency identical with ac bus voltage maintenance and phase place；
Connect the outfan of power model group 12 and the connection circuit 16 of electrical network 11 respectively, for by the output back electrical energy of power model group 12 to electrical network 11；Wherein, connect on circuit 16 and be serially connected with Inductive component 15.
Wherein, phase place and frequency here according to ac bus voltage generate the first process driving signal particularly as follows: phase place and frequency to ac bus voltage carry out SPWM (sinusoid pulse width modulation) modulation, generates the first driving signal according to modulation result.
It is understandable that, on one loop, the voltage at each point place need to keep having identical frequency and phase place, therefore the output voltage of power model group 12 must the frequency identical with ac bus voltage maintenance and phase place, electric energy loop can be formed with electrical network 11, and eliminate the circulation in electric energy loop；Being made up of simultaneously as connect circuit 16 wire, if not being connected to Inductive component 15, then this electric energy loop is the wire composition of non-resistance, it is impossible to forms electric current and realizes electric energy transmission.
It addition, connection circuit here 16 is preferably wire, this is not limited by certain present invention, as long as being capable of the circuit of back electrical energy purpose all within protection scope of the present invention.Meanwhile, the present invention does not limit the material of wire yet.
Wherein, Inductive component 15 here can be an inductance；Can also be two inductance, and two inductance are respectively arranged at and connect on circuit 16 near the side of the outfan of power model group 12 and on the side of electrical network 11.Certainly, the present invention does not limit the size of the inductance value of the type of inductance, number and each inductance that adopt in Inductive component 15.
It is understandable that; the present invention not power limitation module group 12 is phase-locked with electrical network 11 parallel process and circulation technology for eliminating implement form; as long as being capable of electric energy feedback, which kind of no matter adopts phase-locked and circulation technology for eliminating, all within protection scope of the present invention.
As preferably, power model group 12 here includes:
Input rectifying filtration module 121, high-frequency inversion module 122, high frequency transformer 123, filtering high-frequency rectifier module 124 and output inversion module 125.
Wherein, the outfan exporting inversion module 125 is connected with electrical network 11 by connecting circuit 16.
Shown in Figure 2, Fig. 2 is the electrical block diagram of a kind of power model high frequency test system for electronic power transformer provided by the invention；Wherein, input rectifying filtration module 121 is connected with electrical network 11, receive the alternating current of electrical network 11 input and be converted to unidirectional current transmission tremendously high frequency inversion module 122, this alternating current is converted to high-frequency alternating current by high-frequency inversion module 122, high frequency transformer 123 could alter that the voltage of this high-frequency alternating current, high-frequency alternating current can be changed into the high-frequency DC required for load by filtering high-frequency rectifier module 124, and this high-frequency DC can be changed into the alternating current that load needs by output inversion module 125.
It should be noted that, sampling module 13 is a part for the Acquisition Circuit in electronic power transformer, controlling module 14 is the part in the panel in electronic power transformer, in actual production, the each several part of power model high frequency test system provided by the invention is respectively positioned on inside electronic power transformer, wherein, Acquisition Circuit and panel can be integrated in same circuit and can also be provided separately, and this is not construed as limiting by the present invention.
Wherein, the load-side that input rectifying filtration module 121 is full-bridge controlled architecture and full-bridge controlled architecture here is parallel with filter capacitor.Shown in Figure 3, Fig. 3 is the circuit diagram of a kind of full-bridge controlled architecture provided by the invention；Electric current in input rectifying filtration module 121 can be filtered processing by filter capacitor, reduces the noise in electronic power transformer.Certainly, the present invention does not limit the internal structure of input rectifying filtration module 121, as long as it is capable of self function.
It is further known that, the reactive current of the side that sampling module 13 obtains the output voltage of input rectifying filtration module 121, input rectifying filtration module 121 is connected with electrical network 11 and harmonic current transmission are to controlling module 14；
Controlling module 14 and judge that whether the output voltage and first of input rectifying filtration module 121 gives the difference of voltage in preset range, if not existing, then adjusting the rectification parameter controlled in module 14；
Whether the current phase that control module 14 compares reactive current is identical with voltage-phase, if differing, then adjusts the reactive-load compensation parameter controlled in module 14；
Controlling the size of module 14 comparing harmonics present electric current and given harmonic value, if differing, then adjusting the Harmonics elimination parameter controlled in module 14；
Control module 14 to generate two driving signal according to the rectification parameter after adjusting, reactive-load compensation parameter and Harmonics elimination parameter input rectifying filtration module 121 is controlled；
If the difference of the output voltage of input rectifying filtration module 121 and the first given voltage is in preset range, the current phase of reactive current is identical with voltage-phase, and harmonic current is identical with the size of given harmonic value, then controls module 14 and judge that input rectifying filtration module 121 is normal.
It is understandable that, by detecting above and controlling, can interpolate that whether input rectifying filtration module 121 is normal, and when occurring abnormal, ensureing that the output voltage of input rectifying filtration module 121 meets requirement by adjusting input rectifying filtration module 121, this part controls to can be understood as active power controller；Additionally, time identical with voltage-phase due to the current phase when reactive current (namely current zero-crossing point and voltage over zero are same sampling instant), show that the reactive current in power model group 12 is 0 (or reactive power is 0), therefore intrasystem reactive current can also be eliminated by above control, namely the effect of compensating reactive power is realized, for Reactive Power Control；Meanwhile, the given harmonic value in the present invention is preferably arranged to 0, it is possible to being set to be approximately the numerical value of 0, this is not construed as limiting by the present invention, it can be seen that, by above control, it can also be ensured that substantially eliminate intrasystem harmonic current.
Wherein, active power controller and Reactive Power Control in the present invention all can adopt PI control mode, control result according to PI and adjust the parameters controlled in module 14, thus generating two driving signal.
It addition, high-frequency inversion module 122, filtering high-frequency rectifier module 124 and output inversion module 125 adopt any one in full-bridge controlled architecture or half-bridge controlled architecture respectively.Shown in Figure 4, Fig. 4 is the circuit diagram of a kind of half-bridge controlled architecture provided by the invention.It is understood that adopt full-bridge controlled architecture or half-bridge controlled architecture, it is possible to reduce the volume of electronic power transformer.Meanwhile, when filtering high-frequency rectifier module 124 adopts full-bridge controlled architecture or half-bridge controlled architecture, its load-side is also parallel with filter capacitor.Certainly, the present invention does not limit the internal structure of high-frequency inversion module 122, filtering high-frequency rectifier module 124 and output inversion module 125, as long as it is capable of self function.
It is further known that, sampling module 13 obtains the output voltage of filtering high-frequency rectifier module 124 and sends to controlling module 14；
Control module 14 and compare the output voltage of filtering high-frequency rectifier module 124 and the size of the second given voltage；If it is different, the phase contrast adjusted between the driving signal that high-frequency inversion module 122 is corresponding respectively with filtering high-frequency rectifier module 124, and control the output voltage of filtering high-frequency rectifier module 124 according to adjustment result output the 3rd driving signal；If identical, then control module 14 and judge that filtering high-frequency rectifier module 124 is normal.
It is understood that by above detection and control, it is possible to judge that whether filtering high-frequency rectifier module 124 is normal, and when occurring abnormal, control filtering high-frequency rectifier module 124 and adjust the size of output voltage.
It addition, control module 14 here is additionally operable to generate fourth drive signal according to predeterminated frequency, the output frequency of high-frequency inversion module 122 is controlled.Thus ensureing that the output frequency of high-frequency inversion module 122 meets requirement.
It should be noted that the present invention does not limit the algorithm controlling to adopt when each several part in power model group 12 is detected and controls by module 14, as long as being capable of the algorithm of above-mentioned control process, all within protection scope of the present invention.
It is further known that, the present invention does not limit each type driving signal and generating mode yet, as long as the switching tube that can be driven in power model group 12 in corresponding module by driving signal, makes the output of this module meet preset requirement.
Wherein, the high-frequency alternating current of high-frequency inversion module 122 output is square-wave signal, and certainly, this is not construed as limiting by the present invention.
As preferably, including DAB (DualActiveBridge, double; two active bridges) translation circuit or LLC resonant type soft-switch translation circuit in high frequency transformer 123 here.Referring to shown in Fig. 5 and Fig. 6, Fig. 5 is the structural representation for the high frequency transformer in the power model high frequency test system of electronic power transformer provided by the invention (including DAB translation circuit)；Fig. 6 is the structural representation for the high frequency transformer in the power model high frequency test system of electronic power transformer provided by the invention (including LLC resonant type soft-switch translation circuit).
It is understandable that, the ratio that common high frequency transformer 123 is only capable of according to presetting carries out transformation operation, and the output voltage of high frequency transformer 123 can be controlled after adding DAB translation circuit or LLC resonant type soft-switch translation circuit, meanwhile, it is capable to make high frequency transformer 123 realize the function of Sofe Switch.After adding DAB translation circuit or LLC resonant type soft-switch translation circuit, the voltage of the switching tube in observation high-frequency inversion module 122, filtering high-frequency rectifier module 124 and current waveform, if voltage and current waveform show that circuit can complete former avris no-voltage and open (ZVS) and secondary side zero-current switching (ZCS), namely show that high frequency transformer 123 now possesses Sofe Switch function, otherwise need to adjust the circuit parameter in DAB translation circuit or LLC resonant type soft-switch translation circuit.
It addition, select high frequency transformer 123 time, it is necessary to the leakage inductance of high frequency transformer 123 and the size of excitation are tested, and if between desired value error beyond preset scope, otherwise need change high frequency transformer 123；If it addition, under full-loading condition ruuning situation, the temperature of transformer core or winding does not continue to after rising to certain value rise, namely can determine that this high frequency transformer 123 temperature rise control is normal, otherwise need to change the iron core in high frequency transformer 123 or winding.As can be seen here, by selected above, it is therefore an objective to make the high frequency transformer 123 of selection disclosure satisfy that the conditions such as leakage field is little, excitation big, full load temperature rise is inconspicuous.
It is further known that, high-frequency inversion module 122, high frequency transformer 123 and filtering high-frequency rectifier module 124 belong to high-frequency isolation DC-DC converter, and the effect of this high-frequency isolation DC-DC converter is that the unidirectional current that input rectifying filtration module 121 exports is changed into the unidirectional current that load-side needs.
The invention provides a kind of power model high frequency test system for electronic power transformer, include the connection circuit that can connect electrical network respectively with the outfan of the power model group in electronic power transformer, and control module can generate the first driving signal according to the phase place of the ac bus voltage that the electrical network of sampling module collection exports and frequency, control the output voltage frequency identical with the ac bus voltage maintenance on electrical network and the phase place of power model group, it is thus possible to by the output electric energy of power model group by connection electronic feedback to electrical network, namely the present invention achieves the recycling of electric energy as much as possible, reduce the waste of electric energy, reduce testing cost, alleviate the pollution to environment.
It should be noted that, in this manual, term " includes ", " comprising " or its any other variant are intended to comprising of nonexcludability, so that include the process of a series of key element, system, article or equipment not only include those key elements, but also include other key elements being not expressly set out, or also include the key element intrinsic for this process, system, article or equipment.When there is no more restriction, statement " including ... " key element limited, it is not excluded that there is also other identical element in including the process of described key element, system, article or equipment.
Described above to the disclosed embodiments, makes professional and technical personnel in the field be capable of or uses the present invention.The multiple amendment of these embodiments be will be apparent from for those skilled in the art, and generic principles defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention is not intended to be limited to the embodiments shown herein, and is to fit to the widest scope consistent with principles disclosed herein and features of novelty.
Claims (8)
1. the power model high frequency test system for electronic power transformer, it is characterised in that including:
The sampling module being connected with the power model group in described electronic power transformer and electrical network, the phase and frequency of the ac bus voltage that the characteristic parameter and described electrical network for gathering described power model group exports transmission are to controlling module；
Described control module, for described characteristic parameter is judged, is controlled described power model group according to judged result；And generate the first driving signal according to the phase place of described ac bus voltage and frequency and control the output voltage of the described power model group frequency identical with described ac bus voltage maintenance and phase place；
Connect the outfan of described power model group and the connection circuit of described electrical network respectively, for by the output back electrical energy of described power model group to described electrical network；Wherein, described connection circuit is serially connected with Inductive component.
2. system according to claim 1, it is characterised in that described power model group includes:
Input rectifying filtration module, high-frequency inversion module, high frequency transformer, filtering high-frequency rectifier module and output inversion module.
3. system according to claim 2, it is characterised in that include DAB translation circuit or LLC resonant type soft-switch translation circuit in described high frequency transformer.
4. system according to claim 2, it is characterised in that the load-side that described input rectifying filtration module is full-bridge controlled architecture and described full-bridge controlled architecture is parallel with filter capacitor.
5. system according to claim 4, it is characterised in that described high-frequency inversion module, described filtering high-frequency rectifier module and described output inversion module adopt any one in full-bridge controlled architecture or half-bridge controlled architecture respectively.
6. system according to claim 5, it is characterized in that, the reactive current of the side that described sampling module obtains the output voltage of described input rectifying filtration module, described input rectifying filtration module is connected with described electrical network and harmonic current transmission extremely described control module；
Described control module judges that whether the output voltage and first of described input rectifying filtration module gives the difference of voltage in preset range, if not existing, then adjusts the rectification parameter in described control module；
Whether the current phase of the described more described reactive current of control module is identical with voltage-phase, if differing, then adjusts the reactive-load compensation parameter in described control module；
The described more described harmonic current of control module and the size of given harmonic value, if differing, then adjust the Harmonics elimination parameter in described control module；
Described control module generates two driving signal according to the described rectification parameter after adjusting, described reactive-load compensation parameter and described Harmonics elimination parameter described input rectifying filtration module is controlled；
If the output voltage of described input rectifying filtration module gives the difference of voltage in described preset range with described first, the current phase of described reactive current is identical with voltage-phase, and described harmonic current is identical with the size of described given harmonic value, then described control module judges that described input rectifying filtration module is normal.
7. system according to claim 6, it is characterised in that described sampling module obtains the output voltage of described filtering high-frequency rectifier module and sends to described control module；
The size of the output voltage of the more described filtering high-frequency rectifier module of described control module and the second given voltage；If it is different, the phase contrast adjusted between the driving signal that described high-frequency inversion module is corresponding respectively with described filtering high-frequency rectifier module, and signal is driven to control the output voltage of described filtering high-frequency rectifier module according to adjusting result output the 3rd；If identical, then described control module judges that described filtering high-frequency rectifier module is normal.
8. system according to claim 7, it is characterised in that described control module is additionally operable to generate fourth drive signal according to predeterminated frequency and the output frequency of described high-frequency inversion module is controlled.
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