CN102931825A - Anti-impact current adjustment method, adjuster and storage battery power supply - Google Patents
Anti-impact current adjustment method, adjuster and storage battery power supply Download PDFInfo
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- CN102931825A CN102931825A CN2012104012615A CN201210401261A CN102931825A CN 102931825 A CN102931825 A CN 102931825A CN 2012104012615 A CN2012104012615 A CN 2012104012615A CN 201210401261 A CN201210401261 A CN 201210401261A CN 102931825 A CN102931825 A CN 102931825A
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Abstract
The invention relates to an anti-impact current adjustment method, an adjuster and a storage battery power supply. When a load is started to generate impact current, the impact current is limited in a mode of reducing output voltage and output frequency, so that the impact current does not exceed a safety range and does not damage a power device in a circuit. The output frequency is reduced and and moving speed of a motor in the load is also reduced, so the output power of the load is reduced and the impact current of the load is pulled down. Since a signal processing device with a digital processing function is used to adjust a duty ratio for driving the power device so as to adjust the output voltage and the output frequency, the anti-impact current adjustment method has the characteristics of high response speed, good limitation effect and capability of protecting the power device.
Description
Technical field
The present invention relates to a kind of clean energy resource method of supplying power to and system, be specifically related to a kind of impact resistance current control process, adjuster and battery feed.
Background technology
Current remote mountain areas or pastoral area generate electricity to satisfy the electricity consumption needs without electric family with the control integrated machine for reverse conversion, such as wind control integrated machine for reverse conversion or photovoltaic control integrated machine for reverse conversion etc.With the electrical power storage sent of control integrated machine for reverse conversion in storage battery, after the direct current of storage battery output converts alternating current to through inverter, to electric power supply.The motor even load of the compressor of refrigerator and air-conditioning, microwave oven starts in a flash in electrical equipment, because the speed of relative motion is almost 0 between motor stator and the rotor, does not namely have the motion of cutting magnetic field, just can not produce back electromotive force in circuit; When the output voltage of storage battery is constant, ignore the effect of self-induction of loop, nearly all output voltage all has been added on the resistance of circuit, so the impulse current of moment is very large.
As shown in Figure 1, if storage battery is still according to steady state voltage 1 and steady frequency 2 outputs, load current 3 in the circuit will form 7～8 times the impulse current that reaches nominal load current, control integrated machine for reverse conversion in the circuit, storage battery constant power element all will be affected, and can cause controlling integrated machine for reverse conversion when serious and start overcurrent protection; Storage battery is excessive because of impulse current, affects cell voltage and is lower than rated value and causes controlling integrated machine for reverse conversion startup low-voltage variation.The overcurrent protection of frequent starting and low-voltage variation finally cause the availability of whole electric power system to reduce.
The method for limiting of impact electric current mainly comprises in the prior art: 1, thermistor method, such as application for a patent for invention-transient current buffering suppresser (publication number: be exactly by series thermal-sensitive resistance in circuit CN101335451), if have larger impulse current to produce at the load booting moment, thermistor can be limited in impulse current within the rated range; But the shortcoming of thermistor method is, thermistor needs certain hour could arrive the operating state resistance value during startup, thermistor also needs certain cooling time that resistance is elevated to normal-temperature in order to start next time when closing, if motor cuts out rear horse back and opens like this, thermistor this impact electric current that also do not turn cold has just lost restriction.
2, Industrial Frequency Transformer method, the power-frequency voltage device of between control integrated machine for reverse conversion and electrical appliance, connect, when the compressor in the circuit, when electric motor starting produces impulse current, Industrial Frequency Transformer makes output voltage decline, but output frequency remains unchanged.Although reduce to some extent with respect to the impulse current in the situation of steady state voltage, do not change the speed of motor load, thereby impulse current is still larger.
Summary of the invention
The present invention is directed to the deficiencies in the prior art; a kind of energy establishment has been proposed because the impulse current that load starts and outage produces; the impact resistance current control process of protection power source and power device; according to the impact resistance current regulator of the method structure, and the battery feed that uses this impact resistance current regulator.
Technical scheme of the present invention is as follows:
A kind of impact resistance current control process, its step comprises:
1) output at storage battery arranges boost inverter circuit;
2) detect the load current of described boost inverter circuit output, and in signal processor, described load current is judged;
3) when described load current is impulse current, signal processor reduces given voltage according to the size of described impulse current, and calculates in real time given voltage corresponding given frequency and command signal; Drive described boost inverter circuit according to described command signal, make described boost inverter circuit output with output voltage and the output frequency of described given change in voltage;
4) if described given voltage is lower than the minimum voltage that load allows, described signal processor remains described minimum voltage with described given voltage, calculates in real time given voltage corresponding given frequency and command signal;
5) if described impulse current disappears, described signal processor rises described given voltage, calculates in real time given voltage corresponding given frequency and command signal;
6) if described given voltage rises to the rated voltage of described load, described signal processor remains described rated voltage with described given voltage, calculates in real time given voltage corresponding given frequency and command signal.
Described control signal comprises the duty ratio for the driving power device.
Described boost inverter circuit comprises boost full-bridge and inverter bridge, in the power device of described command signal input described boost full-bridge and inverter bridge.
Described signal processor also detects the output voltage of the input voltage of described boost inverter circuit input and input current, boost inverter circuit output, afterwards described boost inverter circuit is carried out FEEDBACK CONTROL, satisfy the normal needs that move of described load in order to output voltage and the output frequency that guarantees described boost inverter circuit.
A kind of impact resistance current regulator is characterized in that: it comprises signal processor, signal acquisition module and drive circuit, and wherein said signal acquisition module detects the load current of output circuit, and detection signal is inputted described signal processor; Described signal processor arranges given voltage according to described load current, calculates given frequency and command signal according to described given voltage afterwards, and described command signal is inputted described drive circuit; Described drive circuit drives power device in the described output circuit according to described command signal, makes output voltage and the output frequency of described output circuit output and described given voltage and given frequency match;
When described load current was impulse current, described output voltage and output frequency all descended, in order to described impulse current is limited in the normal range (NR).
Described signal processor comprises the method to set up of described given voltage:
A) judge whether described load current is impulse current;
B) when described load current is impulse current, reduces given voltage according to the size of described impulse current, and calculate in real time given voltage corresponding given frequency and command signal;
C) if described given voltage is lower than the minimum voltage that load allows, described signal processor remains described minimum voltage with described given voltage, calculates in real time given voltage corresponding given frequency and command signal;
D) if described impulse current disappears, described signal processor rises described given voltage, calculates in real time given voltage corresponding given frequency and command signal;
E) if described given voltage rises to the rated voltage of described load, described signal processor remains described rated voltage with described given voltage, calculates in real time given voltage corresponding given frequency and command signal.
Comprise comparator and voltage modulated module in the described signal processor; Described steps A) in, deterministic process is carried out in described comparator; Described step B)～E) in, the process that described given voltage and the described given frequency of calculating and command signal are set is carried out in described voltage modulated module.
Described signal processor is digital signal processor or application-specific integrated circuit (ASIC).
A kind of battery feed that uses above-mentioned impact resistance current regulator is characterized in that: it also comprises storage battery, the boost inverter circuit of series connection, and described boost inverter circuit comprises the full-bridge that boosts, high frequency transformation bridge, rectifier bridge, the inverter bridge that connects successively; The drive circuit of described impact resistance current regulator drives the power device in described boost full-bridge and the inverter bridge, and the signal acquisition module of described impact resistance current regulator gathers the voltage and current signal of described boost inverter circuit input and output.
Described power device comprises CMOS pipe and/or IGBT pipe.
Technique effect of the present invention is as follows:
When impact resistance current control process of the present invention starts the generation impulse current in load, by the output voltage of reduction boost inverter circuit and the mode of output frequency, limit impulse current, make it can not surpass safe range with the power device in the protective circuit.Because output frequency reduces, the motor movement speed in the load also reduces, and the load power output descends, and then has dragged down the impulse current of load.Owing to the adjustment to output voltage and output frequency is recently to realize by adjusting the duty that is used for the driving power device by the signal processor with digital processing function, thereby have the advantages that response is rapid, restriction effect is good, protect power device.
Impact resistance current regulator of the present invention, has advantages of and can the impulse current that the load short, that repeatedly start of interval start-up time produces effectively be limited than existing thermistor method owing to adopting the said method setting.Than existing Industrial Frequency Transformer method, because the default transformer equipment of bulky the volume of whole adjuster is obviously compressed, and response speed is rapider.
Description of drawings
Fig. 1 is the view of output voltage, output frequency and load current when producing the impact electric current
Fig. 2 is system configuration schematic diagram of the present invention
The view of output voltage, output frequency and load current when Fig. 3 is generation impact electric current after adjusting through method and apparatus of the present invention
Output voltage and load current waveform when Fig. 4 is the refrigerator normal operation
Fig. 5 does not change given voltage U when being the refrigerator startup
RefWith given frequency f
Ref, output voltage and load current waveform
Fig. 6 changes given voltage U when being the refrigerator startup
RefWith given frequency f
Ref, output voltage and load current waveform
Embodiment
The present invention will be described below in conjunction with accompanying drawing.
In order to make purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Specific embodiment described herein only in order to explain the present invention, is not intended to limit the present invention.
As shown in Figure 1, impact resistance current regulator 4 of the present invention comprises signal processor 5, signal acquisition module 6 and drive circuit 7, the input of signal processor 5 connects the output of signal acquisition module 6, and output connects respectively the input of one drive circuit 7 and the input of another drive circuit 7; Wherein comprise comparator 51 and voltage modulated module 52 in the signal processor 5, signal processor 5 can be Digital Signal Processing (DSP) or application-specific integrated circuit (ASIC) (ASIC) etc.Battery feed comprises impact resistance current regulator 4, storage battery 8, boost inverter circuit, load port 10, and storage battery 8, boost inverter circuit, load port 10 connect successively; Comprise the full-bridge 91 that boosts, high frequency transformation bridge 92, rectifier bridge 93, inverter bridge 94 and the filter circuit 95 that connect successively in the boost inverter circuit.The output of one drive circuit 7 drives the power device in the full-bridge 91 that boosts, and the output of another drive circuit 7 drives the power device in the inverter bridge 94, and power device comprises CMOS pipe, IGBT pipe etc.Signal acquisition module 6 gathers respectively the voltage and current signal of busbar voltage between voltage and current signal, rectifier bridge 93 and the inverter bridge 94 of storage battery 8 outputs and current signal, filter circuit 95 outputs.
Signal acquisition module 6 is judged the comparator 51 of the voltage and current signal input signal processor 5 that collects, on the one hand judge whether filter circuit 95 places run into impulse current, the mode by the regulation output frequency limits the impulse current that produces when load starts; Judge on the other hand whether the output voltage of storage battery 8 reaches the output voltage whether dc bus current between the rated output voltage of storage battery 8, rectifier bridge 93 and the inverter bridge 94 reach rated direct current, filter circuit 95 outputs and whether reach the rated output voltage of whole battery feed, guarantees the normal operation of battery feed by the mode of FEEDBACK CONTROL.
When the output voltage U of signal acquisition module 6 in the collection of filter circuit 95 places
OutBe lower than the minimum voltage U of load running
Min, or load current I
RlcDuring for impulse current.Voltage modulated module 52 is set corresponding given voltage U according to the judged result of comparator 51
Ref, again according to current given voltage U
RefCalculate current given frequency f
Ref, f
Ref=kU
Ref+ b, wherein k, b are constant.Duty ratio in the voltage modulated module 52 regulating command signals makes it and current given voltage U
RefCorrespondence, drive circuit 7 drive the power device of boost full-bridge 91 and inverter bridge 94 according to duty ratio, realize the output voltage U to boost inverter circuit
OutWith output frequency f
OutAdjustment, f
Out=k*U
Out+ b, wherein k, b are constant.Make output voltage U
OutWith output frequency f
OutGiven voltage U along with voltage modulated module 52
RefWith given frequency f
RefChange and change, finally reach output voltage U
Out=given voltage U
Ref, output frequency f
Out=given frequency f
Ref
As from the foregoing, when load just starts, the speed of relative motion was almost 0 o'clock between motor stator and the rotor, when filter circuit 95 places run into impulse current, by given voltage U
RefWith given frequency f
RefReduce output voltage U
OutWith output frequency f
OutWork as output voltage U
OutAfter the reduction, impulse current also decreases, and has relative motion between motor stator and the rotor at leisure; As output frequency f
OutAfter the reduction, the relative motion between motor stator and the rotor becomes rising by rising rapidly, and the power output P of motor reduces, by P=I
Rlc 2R is load current I as can be known
RlcReduce immediately, thereby reach the purpose that limits impulse current.
Based on above-mentioned principle, the modulator approach of voltage modulated module 52 comprises:
1) signal acquisition module 6 detects the load current I of a certain moment filter circuit 95 outputs
Rlc, and will judge in this detection signal input comparator 51;
2) as load current I
RlcWhen meeting or exceeding certain threshold value, comparator 51 is with this load current I
RlcBe judged to be impulse current, voltage modulated module 52 according to the size of impulse current progressively or the given voltage U of disposable reduction
Ref, simultaneously according to given voltage U
RefCalculate given frequency f
Ref, the output voltage U of regulating boost inverter circuit
OutWith output frequency f
OutAs shown in Figure 3, work as output voltage U
OutWith output frequency f
OutWhen all reducing, load current I
RlcDecrease;
3) if the given voltage U in the voltage modulated module 52
RefBe lower than the minimum voltage U that load allows
Min, given voltage U then
RefRemain minimum voltage U
Min, can normally start with proof load, simultaneously according to current given voltage U
RefCalculate given frequency f
Ref, this moment output voltage U
Out=minimum voltage U
Min, output frequency f
Out=f
Min
4) if the impulse current of load disappears, i.e. load current I
RlcWhen getting back to normal operating current, the given voltage U in the voltage modulated module 52
RefRise, simultaneously according to current given voltage U
RefCalculate given frequency f
Ref
5) when given voltage U
RefRise to the rated voltage U of load
Rv, given voltage U
RefRemain rated voltage U
Rv, simultaneously according to current given voltage U
RefCalculate given frequency f
Ref
The below is above-mentioned impact resistance current control process and device when being used for without electric family electric power system, and the present invention is with respect to the remarkable result of prior art, and circuit parameter sees Table 1.
Table 1
| Sequence number | Circuit name | Device name | Specifications and |
| 1 | 5 | Signal processor | Digital signal processor (DSP) |
| 2 | 6 | Signal acquisition module | Take operational amplifier as main |
| 3 | 7 | Drive circuit | Take isolating device as main drive circuit |
| 4 | 8 | Storage battery | 24V/200Ah |
| 5 | 91 | Bridge boosts | Power device is metal-oxide-semiconductor |
| 6 | 92 | High frequency transformer | General high frequency transformer |
| 7 | 93 | Rectifier bridge | Power device is fast recovery diode |
| 8 | 94 | Inverter bridge | Power device is IGBT |
| 9 | 95 | Filter circuit | The combination of inductance and electric capacity |
| 10 | 10 | Load port | Driving model is the refrigerator load of BC-50EN |
As shown in Figure 4, when refrigerator worked, yellow curve represented boost inverter circuit ac output voltage U
Out, green curve represents boost inverter circuit AC load electric current I
RlcThe normal working voltage of refrigerator guarantees that at 227V, running current guarantees at 0.584A.
As shown in Figure 5, in circuit, produce impulse current when refrigerator starts moment, do not changing given voltage U
RefWith given frequency f
RefSituation under, yellow curve represents boost inverter circuit ac output voltage U
Out, green curve represents boost inverter circuit AC load electric current I
RlcThe starting resistor of refrigerator guarantees at 219V, and starting the impulse current that moment produces is 8.4A, is 14.3 times of running current.
As shown in Figure 6, in circuit, produce impulse current when refrigerator starts moment, after adjusting through method and apparatus of the present invention, changing given voltage U
RefWith given frequency f
RefSituation under, yellow curve represents boost inverter circuit ac output voltage U
Out, green curve represents boost inverter circuit AC load electric current I
RlcAs seen from the figure, output voltage U
OutBe reduced to 179V, output frequency f
OutDrop to 47.48Hz.Starting the moment impact electric current at refrigerator is 6.68A, is equivalent to do not changing given voltage U
RefWith given frequency f
RefThe time impulse current 80%, therefore effectively limited refrigerator and started the impulse current that moment produces.
Should be pointed out that the above embodiment can make the invention of those skilled in the art's comprehend, but do not limit the present invention in any way creation.Therefore; although this specification has been described in detail the invention with reference to drawings and Examples; but; those skilled in the art are to be understood that; still can make amendment or be equal to replacement the invention; in a word, all do not break away from technical scheme and the improvement thereof of the spirit and scope of the invention, and it all should be encompassed in the middle of the protection range of the invention patent.
Claims (10)
1. impact resistance current control process, its step comprises:
1) output at storage battery arranges boost inverter circuit;
2) detect the load current of described boost inverter circuit output, and in signal processor, described load current is judged;
3) when described load current is impulse current, signal processor reduces given voltage according to the size of described impulse current, and calculates in real time given voltage corresponding given frequency and command signal; Drive described boost inverter circuit according to described command signal, make described boost inverter circuit output with output voltage and the output frequency of described given change in voltage;
4) if described given voltage is lower than the minimum voltage that load allows, described signal processor remains described minimum voltage with described given voltage, calculates in real time given voltage corresponding given frequency and command signal;
5) if described impulse current disappears, described signal processor rises described given voltage, calculates in real time given voltage corresponding given frequency and command signal;
6) if described given voltage rises to the rated voltage of described load, described signal processor remains described rated voltage with described given voltage, calculates in real time given voltage corresponding given frequency and command signal.
2. a kind of impact resistance current control process as claimed in claim 1, it is characterized in that: described command signal comprises the duty ratio for the driving power device.
3. a kind of impact resistance current control process as claimed in claim 2, it is characterized in that: described boost inverter circuit comprises boost full-bridge and inverter bridge, in the power device of described command signal input described boost full-bridge and inverter bridge.
4. such as claim 1 or 2 or 3 described a kind of impact resistance current control process, it is characterized in that: described signal processor also detects the output voltage of the input voltage of described boost inverter circuit input and input current, boost inverter circuit output, afterwards described boost inverter circuit is carried out FEEDBACK CONTROL, satisfy the normal needs that move of described load in order to output voltage and the output frequency that guarantees described boost inverter circuit.
5. impact resistance current regulator, it is characterized in that: it comprises signal processor, signal acquisition module and drive circuit, wherein said signal acquisition module detects the load current of the output of output circuit, and detection signal is inputted described signal processor; Described signal processor arranges given voltage according to described load current, calculates given frequency and command signal according to described given voltage afterwards, and described command signal is inputted described drive circuit; Described drive circuit drives power device in the described output circuit according to described command signal, makes output voltage and the output frequency of described output circuit output and described given voltage and given frequency match;
When described load current was impulse current, described output voltage and output frequency all descended, in order to described impulse current is limited in the normal range (NR).
6. a kind of impact resistance current regulator as claimed in claim 5, it is characterized in that: described signal processor comprises the method to set up of described given voltage:
A) judge whether described load current is impulse current;
B) when described load current is impulse current, reduces given voltage according to the size of described impulse current, and calculate in real time given voltage corresponding given frequency and command signal;
C) if described given voltage is lower than the minimum voltage that load allows, described signal processor remains described minimum voltage with described given voltage, calculates in real time given voltage corresponding given frequency and command signal;
D) if described impulse current disappears, described signal processor rises described given voltage, calculates in real time given voltage corresponding given frequency and command signal;
E) if described given voltage rises to the rated voltage of described load, described signal processor remains described rated voltage with described given voltage, calculates in real time given voltage corresponding given frequency and command signal.
7. a kind of impact resistance current regulator as claimed in claim 6 is characterized in that: comprise comparator and voltage modulated module in the described signal processor; Described steps A) in, deterministic process is carried out in described comparator; Described step B)～E) in, the process that described given voltage and the described given frequency of calculating and command signal are set is carried out in described voltage modulated module.
8. such as claim 5 or 6 or 7 described a kind of impact resistance current regulators, it is characterized in that: described signal processor is digital signal processor or application-specific integrated circuit (ASIC).
9. the battery feed of the described impact resistance current regulator of one of a use such as claim 5～8, it is characterized in that: it also comprises storage battery, the boost inverter circuit of series connection, and described boost inverter circuit comprises the full-bridge that boosts, high frequency transformation bridge, rectifier bridge, the inverter bridge that connects successively; The drive circuit of described impact resistance current regulator drives the power device in described boost full-bridge and the inverter bridge, and the signal acquisition module of described impact resistance current regulator gathers the voltage and current signal of described boost inverter circuit input and output.
10. a kind of battery feed as claimed in claim 9 is characterized in that: described power device comprises CMOS pipe and/or IGBT pipe.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104012615A CN102931825A (en) | 2012-10-19 | 2012-10-19 | Anti-impact current adjustment method, adjuster and storage battery power supply |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104012615A CN102931825A (en) | 2012-10-19 | 2012-10-19 | Anti-impact current adjustment method, adjuster and storage battery power supply |
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| CN102931825A true CN102931825A (en) | 2013-02-13 |
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| CN2012104012615A Pending CN102931825A (en) | 2012-10-19 | 2012-10-19 | Anti-impact current adjustment method, adjuster and storage battery power supply |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106379132A (en) * | 2016-09-18 | 2017-02-08 | 深圳市汇川技术股份有限公司 | On-load starting system and method for low-voltage direct current power supply |
| CN115603430A (en) * | 2022-11-16 | 2023-01-13 | 浙江动一新能源动力科技股份有限公司（Cn） | Portable electric energy storage system and power adjusting method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000201484A (en) * | 1998-12-29 | 2000-07-18 | Omron Corp | Inverter equipment |
| CN101483405A (en) * | 2009-02-27 | 2009-07-15 | 艾纯 | Voltage lowering starting type generator regulator |
| CN101771372A (en) * | 2008-12-29 | 2010-07-07 | 襄樊创新源电气有限公司 | Method for driving starting of rotary motor by high-voltage transducer |
-
2012
- 2012-10-19 CN CN2012104012615A patent/CN102931825A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000201484A (en) * | 1998-12-29 | 2000-07-18 | Omron Corp | Inverter equipment |
| CN101771372A (en) * | 2008-12-29 | 2010-07-07 | 襄樊创新源电气有限公司 | Method for driving starting of rotary motor by high-voltage transducer |
| CN101483405A (en) * | 2009-02-27 | 2009-07-15 | 艾纯 | Voltage lowering starting type generator regulator |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106379132A (en) * | 2016-09-18 | 2017-02-08 | 深圳市汇川技术股份有限公司 | On-load starting system and method for low-voltage direct current power supply |
| CN115603430A (en) * | 2022-11-16 | 2023-01-13 | 浙江动一新能源动力科技股份有限公司（Cn） | Portable electric energy storage system and power adjusting method thereof |
| US11973416B1 (en) | 2022-11-16 | 2024-04-30 | Zhejiang Lera New Energy Power Technology Co., Ltd | Adaptive load-responsive portable electric energy storage system and power regulation method thereof |
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Application publication date: 20130213 |