CN110149063A - Gird-connected inverter current controlled circuit setting device and method - Google Patents
Gird-connected inverter current controlled circuit setting device and method Download PDFInfo
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- CN110149063A CN110149063A CN201910344975.9A CN201910344975A CN110149063A CN 110149063 A CN110149063 A CN 110149063A CN 201910344975 A CN201910344975 A CN 201910344975A CN 110149063 A CN110149063 A CN 110149063A
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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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
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Abstract
The present invention relates to parallel network reverse technical fields, provide gird-connected inverter current controlled circuit setting device and method.The device includes control unit, driving unit, sampling unit, DC source, D.C. contactor, A.C. contactor and inductive load；It is sequentially connected between the DC source, D.C. contactor, AC-DC conversion unit, inductive load and A.C. contactor；It is shorted between the normally opened contact of the A.C. contactor；Wherein, control unit drives D.C. contactor, A.C. contactor and AC-DC conversion unit by driving unit, and pass through the current signal between the bus voltage signal and/or inductive load and AC-DC conversion unit between sampling unit acquisition D.C. contactor and AC-DC conversion unit.Above-mentioned apparatus and method can realize grid-connected grade inverter current control loop dynamic and stability boundaris adjusting in the lesser situation of DC source capacity, can effectively improve the stability and safety of tuning process.
Description
Technical field
The invention belongs to parallel network reverse technical field more particularly to gird-connected inverter current controlled circuit setting device and sides
Method.
Background technique
Currently, the current controlled circuit dynamic and stability boundaris to gird-connected inverter are adjusted, it is usually practical simultaneously in inverter
Debugging and verification is carried out after net operation in online form.And (the especially super large when gird-connected inverter output power is larger
The gird-connected inverter of power, grid-connected power can reach MW rank), it is difficult when debugging current controlled circuit dynamic and stability boundaris
The wild effects such as exempt to occur vibrating, be easy to cause device failure at this time or cause with electric tripping, safety is poor.
Summary of the invention
In view of this, the embodiment of the invention provides gird-connected inverter current controlled circuit setting device and method, with solution
The certainly problem that on-line tuning stability is low, safety is poor in the prior art.
First aspect of the embodiment of the present invention provides a kind of gird-connected inverter current controlled circuit setting device, comprising: control
Unit, driving unit, sampling unit, DC source, D.C. contactor, A.C. contactor and inductive load processed；The DC source is logical
It crosses the D.C. contactor to connect with AC-DC conversion unit, the A.C. contactor is straight by the inductive load and the friendship
Stream-converting unit connection, the D.C. contactor are connect by the AC-DC conversion unit with the inductive load；
Wherein, described control unit is used to drive the D.C. contactor, the ac contactor by the driving unit
Device and the AC-DC conversion unit, and the control sampling unit acquire the D.C. contactor and the AC-DC conversion
The current signal between bus voltage signal and/or the inductive load and the AC-DC conversion unit between unit.
Optionally, gird-connected inverter current controlled circuit setting device further includes information exchange unit；The information exchange
Unit is used for:
It receives the parameter setting of user's input and is sent to described control unit, so that described control unit is according to
Parameter setting drives the D.C. contactor, the A.C. contactor and the AC-DC conversion list by the driving unit
Member, and
The bus voltage signal and current signal are obtained by described control unit.
Optionally, the inductive load is inductance.
Optionally, the information exchange unit is the touch screen with information exchange function.
Optionally, the AC-DC conversion unit is IGBT insulated-gate bipolar transistor device.
Second aspect of the embodiment of the present invention provides a kind of gird-connected inverter current controlled circuit setting method, comprising:
It is closed D.C. contactor and A.C. contactor, and is D.C. contactor, AC-DC conversion unit, friendship by DC source
Contactor and inductive load power supply are flowed, and controls gird-connected inverter current controlled circuit work under conditions of current operating parameters
Make；
Control unit obtains the bus voltage signal between D.C. contactor and AC-DC conversion unit by acquisition unit,
And/or the current signal between inductive load and AC-DC conversion unit；
Control unit calculates gird-connected inverter current control according to the bus voltage signal and/or the current signal
The real response parameter of loop, and the real response parameter and the current target parameter are compared, if the reality
Response parameter and the current target parameter meet preset relation, then complete the adjusting to gird-connected inverter current controlled circuit；
Wherein, the current target parameter is goal-selling parameter corresponding with the current operating parameters.
Optionally, further includes:
Control unit when detecting the bus voltage signal and/or the current signal beyond respective threshold range,
It controls the D.C. contactor and/or A.C. contactor disconnects；
The current operating parameters are updated, and executes the control gird-connected inverter current controlled circuit and joins in work at present
The step of working under conditions of number.
Optionally, it is worked under conditions of the control gird-connected inverter current controlled circuit is in current operating parameters
Before, the method also includes:
The current operating parameters are received by information exchange unit, and are sent to described control unit.
Optionally, the current operating parameters are multiple groups, busbar voltage letter described in every group of one group of current operating parameters correspondence
Number and/or the current signal；
Described control unit calculates gird-connected inverter electric current according to the bus voltage signal and/or the current signal
The real response parameter of control loop, and the real response parameter is compared with the current target parameter, comprising:
Multiple groups reality is calculated in described control unit bus voltage signal according to each group and/or the current signal
Border response parameter；
Each group real response parameter is compared with corresponding current target parameter respectively, and is meeting the default pass
One group of current operating parameters is chosen in the current operating parameters of system, as adjusting result.
Optionally,
It is described to be compared each group real response parameter with the current target parameter respectively and described default meeting
One group of current operating parameters is chosen in the current operating parameters in relationship, comprising:
Each group real response parameter is compared with the current target parameter respectively by control unit, and will be compared
As a result it is sent to information exchange unit；
The comparison result is shown by information exchange unit；
One group of current operating parameters of user's selection are received, and using the current operating parameters as adjusting result.
Existing beneficial effect is the embodiment of the present invention compared with prior art: in the embodiment of the present invention, DC source, direct current
Contactor, AC-DC conversion unit, A.C. contactor and inductive load are sequentially connected, and DC source is D.C. contactor, alternating current-direct current
Converting unit, A.C. contactor and inductive load power supply；Control unit obtains D.C. contactor and alternating current-direct current by sampling unit
Current signal between bus voltage signal and/or inductive load between converting unit and AC-DC conversion unit, and according to
Bus voltage signal and/or current signal calculate the real response parameter of gird-connected inverter current controlled circuit, by real response
Parameter and current target parameter are compared, if real response parameter and current target parameter meet preset relation, completion pair
The adjusting of gird-connected inverter current controlled circuit.
The embodiment of the present invention is shorted inductive load by A.C. contactor, can be real in the lesser situation of DC source capacity
Existing MW grade grid-connected grade inverter current control loops dynamics and stability boundaris adjusting, can be effectively reduced DC source capacity requirement with
With electricity demanding, the stability and safety of tuning process can be effectively improved.
Detailed description of the invention
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to embodiment or description of the prior art
Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only of the invention some
Embodiment for those of ordinary skill in the art without any creative labor, can also be according to these
Attached drawing obtains other attached drawings.
Fig. 1 is the structure chart for the gird-connected inverter current controlled circuit setting device that one embodiment of the invention provides；
Fig. 2 is the flow chart for the gird-connected inverter current controlled circuit setting method that one embodiment of the invention provides.
Specific embodiment
In being described below, for illustration and not for limitation, the tool of such as particular system structure, technology etc is proposed
Body details, to understand thoroughly the embodiment of the present invention.However, it will be clear to one skilled in the art that there is no these specific
The present invention also may be implemented in the other embodiments of details.In other situations, it omits to well-known system, device, electricity
The detailed description of road and method, in case unnecessary details interferes description of the invention.
In order to illustrate technical solutions according to the invention, the following is a description of specific embodiments.
Fig. 1 shows the structure chart of gird-connected inverter current controlled circuit setting device in the present embodiment, should referring to Fig. 1
Gird-connected inverter current controlled circuit adjusting include control unit 100, driving unit 200, sampling unit 300, DC source 400,
D.C. contactor 500, A.C. contactor 600 and inductive load 700.DC source 400, D.C. contactor 500, AC-DC conversion list
It is sequentially connected between member 900, inductive load 700 and A.C. contactor 600.DC source 400 by the D.C. contactor 500 with
The input terminal of AC-DC conversion unit 900 connects, and the first end of 600 normally opened contact of A.C. contactor is negative by the perception
It carries 700 to connect with the output end of the AC-DC conversion unit 900, the D.C. contactor 500 passes through the AC-DC conversion
Unit 900 is connect with the inductive load 700；It is shorted between the second end of 600 normally opened contact of A.C. contactor.
Wherein, described control unit 100 is used to drive the D.C. contactor 500, described by the driving unit 200
A.C. contactor 600 and the AC-DC conversion unit 900, and the direct current is acquired by the sampling unit 300 and is contacted
Bus voltage signal U between device 500 and the AC-DC conversion unit 900busAnd/or the inductive load 700 with it is described
Current signal between AC-DC conversion unit 900.
In use, DC source 400 is D.C. contactor 500, AC-DC conversion unit 900, A.C. contactor 600
With 700 power supply of inductive load power supply, control unit 100 obtains D.C. contactor 500 and AC-DC conversion by acquisition unit 300
Bus voltage signal U between unit 600busAnd/or the electric current letter between inductive load 700 and AC-DC conversion unit 900
Number, control unit 100 is according to bus voltage signal UbusAnd/or current signal, it calculates gird-connected inverter current controlled circuit and is working as
Real response parameter under preceding running parameter, and the real response parameter and current target parameter are compared, if described
Real response parameter and current target parameter meet preset relation, then complete the adjusting to gird-connected inverter current controlled circuit.
Above-mentioned gird-connected inverter current controlled circuit setting device is shorted inductive load by A.C. contactor, so that dress
The output loading set is pure inductive load, so as to realize that MW grades of grid-connected grades are inverse in the lesser situation of 400 capacity of DC source
Become device current controlled circuit dynamic and stability boundaris adjusting, can be effectively reduced 400 capacity requirement of DC source and with electricity demanding, energy
Enough effectively improve the stability and safety of tuning process.
It should be noted that unlimited to the number of driving unit 100 in the present embodiment.Wherein, the number of driving unit 100
It can be one, i.e., D.C. contactor 500, A.C. contactor 600 and AC-DC conversion list be driven by a driving unit 100
Member 900；The number of driving unit 100 may be two, D.C. contactor 500 and the corresponding driving of A.C. contactor 600
Unit 100, the corresponding driving unit 100 of AC-DC conversion unit 900；The number of driving unit 100 may be three, i.e.,
D.C. contactor 500, A.C. contactor 600 and AC-DC conversion unit 900 correspond to a driving unit 100.Certainly, for
For 900 three of D.C. contactor 500, A.C. contactor 600 and AC-DC conversion unit, the function of required driving unit 100
Energy structure may be not quite similar, and those skilled in the art may set according to actual needs, no longer limits herein.
In the present embodiment, AC-DC conversion unit 900 can be IGBT (Insulated Gate Bipolar
Transistor, insulated gate bipolar transistor) device.
In one embodiment, referring to Fig. 1, above-mentioned gird-connected inverter current controlled circuit setting device can also include information
Interactive unit 800.Information exchange unit 800 is used to receive the parameter setting of user's input and is sent to described control unit 100,
So that described control unit 100 drives the direct current to contact according to control parameter setting by the driving unit 200
Device 500, the A.C. contactor 600 and the AC-DC conversion unit 900, and institute is obtained by described control unit 200
State bus voltage signal and current signal.It wherein, can be total by communicating between information exchange unit 800 and control unit 100
Line is connected to transmit data, and but not limited to this.For example, can also pass through between information exchange unit 800 and control unit 100
The connection of the other modes such as wireless communication is to transmit data.
In the present embodiment, information exchange unit 800 generates control parameter, and user can be right by information exchange unit 800
Current controlled circuit carries out control parameter setting；Described control unit 100 is single by driving according to the control parameter of user setting
Member 200 realizes the control to D.C. contactor 500, A.C. contactor 600 and AC-DC conversion unit 900.
Wherein, the parameter setting may include loop parameter setting and/or hardware parameter setting.Loop parameter setting packet
It includes but is not limited to the setting of PID (proportional, integral-derivative) control ring proportionality coefficient scope, integral coefficient range is arranged, overshoot refers to
Mark range, dynamic indicator range, steady-state error indication range；Wherein, loop parameter is set as in above-mentioned parameter setting at least
One.Hardware parameter setting includes but is not limited to such as IGBT switching frequency, dead zone, current limliting, pressure limiting setting；Wherein, hardware
Parameter is set as at least one in above-mentioned parameter setting.
Optionally, information exchange unit 800 can also collect bus voltage signal U by control unit 100busAnd electric current
The dynamic datas such as signal, and by bus voltage signal UbusWith the software test data generations dynamic waveform such as current signal, in order to user
The case where intuitively knowing to the adjusting of gird-connected inverter current controlled circuit.
In the present embodiment, information exchange unit 800 can be the terminal with information exchange function, such as hand over information
The touch screen etc. of mutual function.Preferably, information exchange unit 800 can also be for also with the terminal of certain storage capacity.Pass through
Setting information interactive unit 800 enables to the selection control parameter that user is simple and efficient, completes to gird-connected inverter electric current control
The control parameter of loop processed is arranged；Collecting bus voltage signal UbusAfter the dynamic datas such as current signal, information exchange unit
To and by bus voltage signal UbusWith the software test data generations dynamic waveform such as current signal, observe convenient for user to parallel network reverse
The case where device current controlled circuit is adjusted, but also storage record can be carried out to dynamic data, tracking is used so as to subsequent.
Referring to Fig. 1, in one embodiment, inductive load 600 is as entire gird-connected inverter current controlled circuit adjusting dress
The inductive load of output end is set, can be inductance, but not limited to this.In the present embodiment, inductive load 600 can by it is multiple simultaneously
The inductance of connection is constituted, such as is made of three inductance in parallel；One normally opened contact of each inductance and A.C. contactor 700
Second end connection.The direct current that AC-DC conversion unit 900 exports DC source 400 is converted to alternating current, wherein each inductance
A corresponding phase alternating current.
In addition, A.C. contactor 700 is exchange corresponding with the alternating current that AC-DC conversion unit 900 exports referring to Fig. 1
Contactor.For example, the alternating current that AC-DC conversion unit 900 exports has three-phase, then the structure of A.C. contactor 700 and this three-phase
Alternating current is corresponding.
In above embodiments, in busbar voltage UbusWhen greater than voltage threshold, control unit 100 is sent to driving unit 200
D.C. contactor shutdown control signal, driving unit 200 turn off control signal according to D.C. contactor and control D.C. contactor 500
It disconnects, so as to be protected in time to device；When current signal is greater than current threshold, control unit 100 is single to driving
Member 200 sends A.C. contactor shutdown control signal, and driving unit 200 turns off control signal control exchange according to A.C. contactor
Contactor 600 disconnects, to protect in time to device.
Optionally, filter capacitor C1 can also be parallel between D.C. contactor 500 and AC-DC conversion unit 900.
The direct current that filter capacitor C1 is used to export DC source 500 is filtered, and may be contained in the direct current that DC source 500 exports
Alternating current can prevent alternating current therein from entering AC-DC conversion unit 900 by the way that filter capacitor C1 is arranged.
Above-mentioned gird-connected inverter current controlled circuit setting device is shorted inductive load by A.C. contactor, so that dress
The output loading set is pure inductive load, so as to realize that MW grades of grid-connected grades are inverse in the lesser situation of 400 capacity of DC source
Become device current controlled circuit dynamic and stability boundaris adjusting, can be effectively reduced 400 capacity requirement of DC source and with electricity demanding, energy
Enough effectively improve the stability and safety of tuning process；And information exchange unit 800 is observed convenient for user to parallel network reverse
The case where device current controlled circuit is adjusted, but also storage record can be carried out to dynamic data, tracking is used so as to subsequent.
Corresponding to the setting device of gird-connected inverter current controlled circuit described in above-described embodiment, based on same invention
Design, following embodiment disclose a kind of gird-connected inverter current controlled circuit setting method again, therefore repeat place and do not repeating.
Referring to fig. 2, to the gird-connected inverter current controlled circuit setting method in the present embodiment, details are as follows:
Step 201, it is closed D.C. contactor and A.C. contactor, and is D.C. contactor, alternating current-direct current turn by DC source
Unit, A.C. contactor and inductive load power supply are changed, and controls gird-connected inverter current controlled circuit in current operating parameters
Under the conditions of work.
Wherein, DC source can be the DC source of low capacity, be D.C. contactor, AC-DC conversion unit, ac contactor
Device and inductive load power supply.
In this step, current operating parameters can be pre-entered, so that control gird-connected inverter current controlled circuit exists
It works under conditions of current operating parameters.Wherein, current operating parameters may include that loop parameter setting and/or hardware parameter are set
It sets.Loop parameter setting includes but is not limited to the setting of PID (proportional, integral-derivative) control ring proportionality coefficient scope, integral coefficient
Range setting, overshoot indication range, dynamic indicator range, steady-state error indication range；Wherein, loop parameter is set as above-mentioned
At least one of in parameter setting.Hardware parameter setting includes but is not limited to such as IGBT switching frequency, dead zone, current limliting, pressure limiting
Setting etc.；Wherein, hardware parameter is set as at least one in above-mentioned parameter setting.
Optionally, above-mentioned gird-connected inverter current controlled circuit setting method can also include:
The current operating parameters are received by information exchange unit, and are sent to described control unit.
Wherein, information exchange unit can receive the current operating parameters of user's input, and the current operating parameters are sent out
Give control unit.Specifically, parameter setting option can be generated in information exchange unit, for user to current controlled circuit into
Row parameter setting, information exchange unit receive the parameter that user selects according to parameter setting option, generate the work at present ginseng
Number.
The current operating parameters that described control unit is sent according to information exchange unit control direct current by driving unit and connect
The working condition of tentaculum, A.C. contactor and AC-DC conversion unit.
Step 202, control unit obtains the bus between D.C. contactor and AC-DC conversion unit by acquisition unit
Current signal between voltage signal and/or inductive load and AC-DC conversion unit.
Referring to Fig. 1, in one embodiment, inductive load 600 is as entire gird-connected inverter current controlled circuit adjusting dress
The inductive load of output end is set, can be inductance, but not limited to this.In the present embodiment, inductive load 600 can by it is multiple simultaneously
The inductance of connection is constituted, such as three.The direct current that AC-DC conversion unit 900 exports DC source 400 is converted to alternating current,
In the corresponding phase alternating current of each inductance.Therefore, the electric current between acquisition unit acquisition inductive load and AC-DC conversion unit
Signal should be the current signal of each phase alternating current of the output of AC-DC conversion unit 900.
Step 203, control unit calculates gird-connected inverter current control according to bus voltage signal and/or current signal
The real response parameter of loop, and the real response parameter and the current target parameter are compared, if the reality
Response parameter and the current target parameter meet preset relation, then complete the adjusting to gird-connected inverter current controlled circuit.
Wherein, the current target parameter is goal-selling parameter corresponding with the current operating parameters.For example, described
Current target parameter can be the theory target function or dreamboat function under the current operating parameters.
In one embodiment, the current operating parameters may include multiple groups running parameter；Every group of running parameter corresponding one
The group bus voltage signal and/or the current signal.Step 203 can be realized by following procedure:
Multiple groups reality is calculated in described control unit bus voltage signal according to each group and/or the current signal
Border response parameter；
Each group real response parameter is compared with corresponding current target parameter respectively, and is meeting the default pass
One group of current operating parameters is chosen in the current operating parameters of system, as adjusting result.
Wherein it is possible to execute above-mentioned gird-connected inverter electric current in above-mentioned gird-connected inverter current controlled circuit setting device
After control loop setting method, control unit bus voltage signal according to every group of actual acquisition and/or electric current letter
Number, multiple groups real response parameter is calculated.Each group real response parameter is compared with current target parameter respectively again, it will
Meet the current operating parameters of preset relation alternately parameter between real response parameter and corresponding current target parameter, so
One group of preferably current operating parameters is chosen from alternative parameter afterwards as adjusting result.Wherein, meet the current of preset relation
Running parameter is to meet the corresponding current operating parameters of the real response parameter of preset relation between current target parameter.
In the present embodiment, preset relation is met between real response parameter and corresponding current target parameter can be with are as follows: real
Difference between border response parameter and corresponding current target parameter is less than threshold value；Chosen from alternative parameter one group preferably when
Preceding running parameter can be with as adjusting result are as follows: using the corresponding current operating parameters of minimal difference as adjusting result.
As an embodiment, described to compare each group real response parameter with the current target parameter respectively
Compared with, and one group of current operating parameters is chosen in meeting the current operating parameters in the preset relation, may include:
Each group real response parameter is compared with the current target parameter respectively by control unit, and will be compared
As a result it is sent to information exchange unit；
The comparison result is shown by information exchange unit；
One group of current operating parameters of user's selection are received, and using the current operating parameters as adjusting result.
Optionally, above-mentioned gird-connected inverter current controlled circuit setting method can also include:
Control unit when detecting the bus voltage signal and/or the current signal beyond respective threshold range,
It controls the D.C. contactor and/or A.C. contactor disconnects；
The current operating parameters are updated, and executes the control gird-connected inverter current controlled circuit and joins in work at present
The step of working under conditions of number.
Illustratively, in busbar voltage UbusWhen greater than voltage threshold, control unit sends D.C. contactor to driving unit
Shutdown control signal, driving unit turns off control signal control D.C. contactor according to D.C. contactor and disconnects, in time to dress
It sets and is protected；When current signal is greater than current threshold, control unit sends A.C. contactor shutdown control to driving unit 200
Signal processed, driving unit turns off control signal control A.C. contactor according to A.C. contactor and disconnects, to carry out in time to device
Protection.
After control unit controls the D.C. contactor and/or A.C. contactor disconnects, need to current operating parameters
It is updated, and continues to execute step 201 to step 203 according to updated current operating parameters.
Optionally, above-mentioned gird-connected inverter current controlled circuit setting method can also include: that information exchange unit passes through
Control unit collects bus voltage signal and current signal, and bus voltage signal and current signal are generated dynamic waveform.
In the present embodiment, information exchange unit can be the terminal with information exchange function, such as with information exchange
The touch screen etc. of function.Preferably, information exchange unit can also be for also with the terminal of certain storage capacity.Believed by setting
Interactive unit is ceased, the selection control parameter that user is simple and efficient is enabled to, is completed to gird-connected inverter current controlled circuit
Control parameter setting；Collecting bus voltage signal UbusAfter the dynamic datas such as current signal, information exchange unit is to and by female
Line voltage signal UbusWith the software test data generations dynamic waveform such as current signal, observe convenient for user to gird-connected inverter electric current control
The case where loop processed is adjusted, but also storage record can be carried out to dynamic data, tracking is used so as to subsequent.
Above-mentioned gird-connected inverter current controlled circuit setting method, control unit obtain D.C. contactor by acquisition unit
Bus voltage signal U between AC-DC conversion unitbusAnd/or the electric current between inductive load and AC-DC conversion unit
Signal, control unit is according to bus voltage signal UbusAnd/or current signal, calculate the reality of gird-connected inverter current controlled circuit
Border response parameter, and the real response parameter and the current target parameter are compared, if the real response parameter
Meet preset relation with the current target parameter, then completes the adjusting to gird-connected inverter current controlled circuit.Pass through exchange
Contactor is shorted inductive load, so that the output loading of device is pure inductive load, so as to smaller in 400 capacity of DC source
In the case where realize that MW grade grid-connected grade inverter current control loops dynamics and stability boundaris are adjusted, can be effectively reduced DC source
400 capacity requirements and match electricity demanding, the stability and safety of tuning process can be effectively improved.
Above-mentioned gird-connected inverter current controlled circuit setting method can realize MW in the lesser situation of DC source capacity
The grid-connected grade inverter current control loop dynamic of grade and stability boundaris adjusting, can be effectively reduced DC source capacity requirement and distribution
Demand can effectively improve the stability and safety of tuning process.
Embodiment described above is merely illustrative of the technical solution of the present invention, rather than its limitations；Although referring to aforementioned reality
Applying example, invention is explained in detail, those skilled in the art should understand that: it still can be to aforementioned each
Technical solution documented by embodiment is modified or equivalent replacement of some of the technical features；And these are modified
Or replacement, the spirit and scope for technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution should all
It is included within protection scope of the present invention.
Claims (10)
1. a kind of gird-connected inverter current controlled circuit setting device characterized by comprising control unit, is adopted driving unit
Sample unit, DC source, D.C. contactor, AC-DC conversion unit, inductive load and A.C. contactor；The DC source, direct current
It is sequentially connected between contactor, AC-DC conversion unit, inductive load and A.C. contactor；The normally opened touching of the A.C. contactor
It is shorted between point；
Wherein, described control unit drives the D.C. contactor, the A.C. contactor and described by the driving unit
AC-DC conversion unit, and acquired between the D.C. contactor and the AC-DC conversion unit by the sampling unit
Bus voltage signal and/or the inductive load and the AC-DC conversion unit between current signal.
2. gird-connected inverter current controlled circuit setting device as described in claim 1, which is characterized in that further include that information is handed over
Mutual unit；The information exchange unit is used for:
It receives the parameter setting of user's input and is sent to described control unit, so that described control unit is according to the parameter
Setting drives the D.C. contactor, the A.C. contactor and the AC-DC conversion unit by the driving unit, with
And
The bus voltage signal and current signal are obtained by described control unit.
3. gird-connected inverter current controlled circuit setting device as described in claim 1, which is characterized in that the inductive load
For inductance.
4. gird-connected inverter current controlled circuit setting device as described in claim 1, which is characterized in that the information exchange
Unit is the touch screen with information exchange function.
5. such as the described in any item gird-connected inverter current controlled circuit setting devices of Claims 1-4, which is characterized in that institute
Stating AC-DC conversion unit is IGBT insulated-gate bipolar transistor device.
6. a kind of gird-connected inverter current controlled circuit setting method characterized by comprising
It is closed D.C. contactor and A.C. contactor, and passes through DC source and is connect for D.C. contactor, AC-DC conversion unit, exchange
Tentaculum and inductive load power supply, and control gird-connected inverter current controlled circuit and work under conditions of current operating parameters；
Control unit obtains the bus voltage signal between D.C. contactor and AC-DC conversion unit by acquisition unit, and/
Or the current signal between inductive load and AC-DC conversion unit；
Control unit calculates gird-connected inverter current controlled circuit according to the bus voltage signal and/or the current signal
Real response parameter, and the real response parameter and the current target parameter are compared, if the real response
Parameter and the current target parameter meet preset relation, then complete the adjusting to gird-connected inverter current controlled circuit；Wherein,
The current target parameter is goal-selling parameter corresponding with the current operating parameters.
7. gird-connected inverter current controlled circuit setting method as claimed in claim 6, which is characterized in that further include:
Control unit is when detecting the bus voltage signal and/or the current signal beyond respective threshold range, control
The D.C. contactor and/or A.C. contactor disconnect；
The current operating parameters are updated, and execute the control gird-connected inverter current controlled circuit in current operating parameters
Under the conditions of the step of working.
8. gird-connected inverter current controlled circuit setting method as claimed in claim 6, which is characterized in that controlled simultaneously described
Before net inverter current control loop works under conditions of current operating parameters, the method also includes:
The current operating parameters are received by information exchange unit, and are sent to described control unit.
9. such as the described in any item gird-connected inverter current controlled circuit setting methods of claim 6 to 8, which is characterized in that institute
Stating current operating parameters is multiple groups, bus voltage signal described in every group of one group of current operating parameters correspondence and/or electric current letter
Number；
Described control unit calculates gird-connected inverter current control according to the bus voltage signal and/or the current signal
The real response parameter of loop, and the real response parameter is compared with the current target parameter, comprising:
The practical sound of multiple groups is calculated in described control unit bus voltage signal according to each group and/or the current signal
Answer parameter；
Each group real response parameter is compared with corresponding current target parameter respectively, and is meeting the preset relation
One group of current operating parameters is chosen in the current operating parameters, as adjusting result.
10. gird-connected inverter current controlled circuit setting method as claimed in claim 9, which is characterized in that described by each group
Real response parameter is compared with the current target parameter respectively, and is meeting the current work in the preset relation
Make to choose one group of current operating parameters in parameter, comprising:
Each group real response parameter is compared with the current target parameter respectively by control unit, and by comparison result
It is sent to information exchange unit；
The comparison result is shown by information exchange unit；
One group of current operating parameters of user's selection are received, and using the current operating parameters as adjusting result.
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