CN204614723U - Input circuit and power inverter - Google Patents
Input circuit and power inverter Download PDFInfo
- Publication number
- CN204614723U CN204614723U CN201290001291.0U CN201290001291U CN204614723U CN 204614723 U CN204614723 U CN 204614723U CN 201290001291 U CN201290001291 U CN 201290001291U CN 204614723 U CN204614723 U CN 204614723U
- Authority
- CN
- China
- Prior art keywords
- switch
- direct current
- pole
- input terminal
- input
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/54—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
-
- 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
- H02J3/381—Dispersed generators
-
- 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
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
- H01H33/59—Circuit arrangements not adapted to a particular application of the switch and not otherwise provided for, e.g. for ensuring operation of the switch at a predetermined point in the ac cycle
- H01H33/596—Circuit arrangements not adapted to a particular application of the switch and not otherwise provided for, e.g. for ensuring operation of the switch at a predetermined point in the ac cycle for interrupting dc
-
- 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
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/20—The dispersed energy generation being of renewable origin
- H02J2300/22—The renewable source being solar energy
- H02J2300/24—The renewable source being solar energy of photovoltaic origin
-
- 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
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
-
- 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
- H02M7/53—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 using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—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 using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
- H02M7/5387—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 using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
Abstract
The utility model provides a kind of input circuit and power inverter.Above-mentioned input circuit is connected with each input terminal of the on-off switch with positive input terminal and negative input with the direct current power of negative pole accordingly by having positive pole, double-pole singlethrow switch (dpst switch) have at the positive pole of direct current power and electrode input end sub-connection and the negative pole of direct current power and negative input sub-connection time, extinguishing arc mechanism that arc discharge during this switching manipulation is decayed, and be electrically connected with diode from negative input terminal to the direction of positive input terminal streaming current.Above-mentioned power inverter is after passing through above-mentioned input circuit input direct-current electric power, booster circuit is utilized to boost its voltage, utilize inverter circuit to be converted to alternating electromotive force and be supplied to load, booster circuit has reactor, switch element, rectifier diode and capacitor, the fly-wheel diode of the energising in the direction that sense of current when being arranged in parallel with switch element the action can carried out with this switch element is contrary.
Description
Technical field
The utility model relates to input from the input circuit of the direct current power of the direct current power source supplies such as solar cell, fuel cell, storage battery and the power inverter direct current power obtained by this input circuit being converted to alternating electromotive force.
Background technology
In recent years, exploitation has the direct current power generated electricity by solar cell, fuel cell, storage battery etc. is converted to alternating electromotive force, and the alternating electromotive force after this conversion is supplied to the alternating electromotive force feed system of load.Such as, solar battery cell due to the electromotive force of unit and output current little, so the solar module being connected in series by multiple solar battery cell and obtaining is connected in parallel multiple and direct current power desired by obtaining.In addition, appropriate number parallel/series is also connected by fuel cell and storage battery, to obtain desired output.
Such as, if be solar power system, then not only there is multiple solar module but also there is the curren-collecting part output of these solar energy modules put together and power conversion unit direct current power being converted to alternating electromotive force.This curren-collecting part connects the distribution that connected respectively by multiple solar module and forms an output line in case.Thus, multiple solar module can be connected in parallel by curren-collecting part, and being concentrated by the output power of multiple solar module is one.The DC output power of the multiple solar modules put together by curren-collecting part is output to power conversion unit, by this power conversion unit be converted to the alternating electromotive force of the Frequency Synchronization of commercial electric power system after, overlapping with commercial electric power system (load).In addition, also exist and alternating electromotive force is not directly supplied to the situation of load by the distribution of commercial electric power system.
In such curren-collecting part, at positive pole circuit and the negative pole circuit of direct current power, be respectively arranged with direct current shutter, the direct current power sources such as solar cell can be separated (with reference to following patent documentation 1) when carrying out the maintenance of system.In addition, when opening the contact pin of direct current shutter in direct current shutter during streaming current, produce arc discharge.Namely in the circuit of flowing big current, even if open the contact pin of direct current shutter from contact in order to breaking current, due to arc discharge, also there is ionization in the ambient air of contact pin and contact, according to the distance between contact pin and contact near etc. condition, exist arc discharge continue situation.Contact and contact pin can be heated due to this arc discharge, and in addition, direct current shutter can break down due to the heat of arc discharge.Therefore, the direct current shutter (with reference to following patent documentation 2) possessing the extinguishing arc mechanism that arc discharge is disappeared is provided.
In this extinguishing arc mechanism, such as, there is the structure utilizing magnet shown in patent documentation 2 like that.Specifically, to extinguishing arc mechanism by magnet configuration near contact pin time, arc discharge direction to change because of the power that correspondingly produces with the direction of sense of current and magnetic flux and utilize.Extinguishing arc mechanism has magnetic sheet before the arc discharge, introduces arc discharge and carry out cutting off, cooling at magnetic sheet, thus eliminates arc discharge.Therefore, sense of current is fixed by the direct current shutter with extinguishing arc mechanism, makes arc discharge towards magnetic sheet side.Therefore, direct current shutter predetermines polarity (positive pole, negative pole) when connecting the connection to direct current power source.
Prior art document
Patent documentation
Patent documentation 1: Japanese Unexamined Patent Publication 2010-41758 publication
Patent documentation 2: Japanese Unexamined Patent Publication 2011-129385 publication
Utility model content
Utility model problem to be solved
But, if direct current power and the polarity predetermined differently are connected to direct current shutter, then form the circulating path of electric current according to circuit structure, if the contact pin that there is direct current shutter is closed, the situation that electric current directly flows.If expand the contact pin of direct current shutter in this condition, then produce arc discharge, but the sense of current of the flowing of this arc discharge is contrary, so the effect of magnet by extinguishing arc mechanism, become with the existence side of magnetic sheet in the opposite direction.Therefore, there is arc discharge and do not disappear, direct current shutter produces the situation of fault.
The danger that the arc discharge being included in generation when the contact pin of direct current shutter being opened from contact continues.Although also produce arc discharge when contact pin being closed to contact, the time that this arc discharge continues is time of contact pin down periods, shorter than duration when contact pin is open from contact.But, in this case, if arc discharge occurs often, also there is the possibility producing the problem identical with above-mentioned explanation.
The utility model completes in view of above-mentioned various problem, its object is to, even if provide when direct current power and predetermined polarity are differently connected to direct current shutter, the input circuit of the fault of the direct current shutter that arc discharge also can be suppressed to cause and power inverter.
For the mode of dealing with problems
In order to achieve the above object, input circuit of the present utility model is the input circuit that will have positive pole and be connected accordingly with each input terminal of the double-pole singlethrow switch (dpst switch) with positive input terminal and negative input with the direct current power of negative pole, it is characterized in that,
Above-mentioned double-pole singlethrow switch (dpst switch) have at the positive pole of above-mentioned direct current power and electrode input end sub-connection and the negative pole of above-mentioned direct current power and negative input sub-connection time, extinguishing arc mechanism that arc discharge during this switching manipulation is decayed, and be electrically connected with diode from above-mentioned negative input terminal to the direction of above-mentioned positive input terminal streaming current.
At input circuit of the present utility model, even if the positive pole of direct current power and negative pole are differently connected to negative input terminal as the double-pole singlethrow switch (dpst switch) of direct current shutter or positive input terminal, also before this double-pole singlethrow switch (dpst switch), the state that direct current power is shorted by diode is become, so electric current does not flow to this double-pole singlethrow switch (dpst switch).Therefore, according to input circuit of the present utility model, in double-pole singlethrow switch (dpst switch), do not produce arc discharge, so the possibility step-down that this double-pole singlethrow switch (dpst switch) breaks down due to arc discharge.In addition, direct current shutter of the present utility model can at solar module, fuel cell and storage battery etc., situation be inferior is applied as direct current power source.
At input circuit of the present utility model, also can be following mode: be connected to the booster circuit with reactor, switch element, rectifier diode and capacitor at the connecting terminals of the outlet side of above-mentioned double-pole singlethrow switch (dpst switch), be arranged in parallel the fly-wheel diode of the energising can carrying out the direction contrary with sense of current during this switch element action with above-mentioned switch element.
According to input circuit of the present utility model, even if when the fly-wheel diode of such booster circuit plays a role as the circulating path of electric current when being connected on the contrary by direct current power, the protection of above-mentioned double-pole singlethrow switch (dpst switch) also can be carried out.
In addition, at input circuit of the present utility model, preferred above-mentioned direct current power is the electric power utilizing solar cell power generation.
Solar cell due to the electromotive force of unit and output current little, so multiple connected in series or in parallel for multiple solar battery cell and the solar module that obtains is obtained desired direct current power by using.Therefore, if applied utilizing the structure of solar cell power generation as direct current power, then by large for the possibility of positive pole and negative pole incorrect link, so the action effect of input circuit of the present utility model can be confirmed well.
Further, its voltage utilizes booster circuit to boost by power inverter of the present utility model after being inputted by direct current power by input circuit, utilize inverter circuit to be converted to alternating electromotive force and be supplied to load, the feature of this power inverter is: the positive pole of above-mentioned direct current power is connected with negative pole each input terminal with the double-pole singlethrow switch (dpst switch) with positive input terminal and negative input by above-mentioned input circuit accordingly, above-mentioned double-pole singlethrow switch (dpst switch) have at the positive pole of above-mentioned direct current power and above-mentioned electrode input end sub-connection and the negative pole of above-mentioned direct current power and above-mentioned negative input sub-connection time, make the extinguishing arc mechanism that arc discharge during this switching manipulation is decayed, and be electrically connected with diode from above-mentioned negative input terminal to the direction of above-mentioned positive input terminal streaming current, above-mentioned booster circuit has reactor, switch element, rectifier diode and capacitor, the fly-wheel diode of the energising in the direction that sense of current when being arranged in parallel with above-mentioned switch element the action can carried out with this switch element is contrary.
According to power inverter of the present utility model, even if the positive pole of direct current power and negative pole are connected to mistakenly the negative input terminal of double-pole singlethrow switch (dpst switch) or positive input terminal, formation by the circulating path of the electric current of fly-wheel diode, also before this switch, become the state that direct current power is shorted by diode, so electric current does not flow to this switch, do not produce arc discharge.Therefore the possibility that this switch breaks down due to arc discharge reduces.
In addition, at power inverter of the present utility model, preferred above-mentioned direct current power is the electric power utilizing solar cell power generation.
When as direct current power in the structure application utilizing solar cell power generation time, as described above, even if when positive pole and negative pole incorrect link are to power inverter, the action effect of power inverter of the present utility model also can be confirmed well.
Accompanying drawing explanation
Fig. 1 is the block diagram of the alternating electromotive force feed system representing execution mode 1.
Fig. 2 is the circuit diagram of the curren-collecting part of execution mode 1.
Fig. 3 is the circuit diagram of the inverter of execution mode 1.
Fig. 4 is the circuit diagram of the curren-collecting part of variation 1.
Fig. 5 is the circuit diagram of the curren-collecting part of variation 2.
Fig. 6 is the circuit diagram of the power inverter of execution mode 2.
The explanation of Reference numeral
1 alternating electromotive force feed system
2A ~ 2D solar module
3,3A, 3B curren-collecting part (relay terminal case)
4 inverters
5 connect relay
6 loads
7 source power supply systems
10a ~ 10e the 1st diode
11a ~ 11e positive input terminal
12a ~ 12e negative input terminal
13A ~ 13E on-off switch
14 positive output terminals
15 negative output terminals
16 positive input terminal
17 negative input terminal
18 switch elements
19 switching circuits
20 full-bridge circuits
21,22 AC output terminal
23a ~ 23h the 2nd diode
24 power inverters
DCL direct current reactor
ACL AC reactor
CON smmothing capacitor
Xc capacitor
RLY system relay
Embodiment
Below, be described in detail to for implementing mode of the present utility model with reference to each execution mode and accompanying drawing.But, each execution mode shown below is described an example of the input circuit for being specialized by technological thought of the present utility model and power inverter, and do not mean that the input circuit and power inverter that to be defined as by the utility model and to record in these execution modes, also can similarly apply in other execution mode that the utility model comprises within the scope of the claims.In addition, the utility model also can similarly be applied when using any one in solar cell, fuel cell and storage battery as direct current power, but in the following description using the situation of the solar module using multiple solar cell series and parallel connections to be formed by connecting as direct current power for representative is described.
[execution mode 1]
First, the schematic configuration of Fig. 1 to the alternating electromotive force feed system 1 of execution mode 1 is used to be described.This alternating electromotive force feed system 1 comprise the generation power of multiple (such as 4) solar module 2A ~ 2D converged be a direct current power curren-collecting part (also referred to as collector box, relay terminal case) 3 and this direct current power is converted to the inverter 4 of alternating electromotive force, the alternating electromotive force exported from inverter 4 is through connecting relay 5, being suitably supplied to load 6 or overlapping with source power supply system 7.
Solar module 2A ~ 2D comprises respectively and being connected in series by multiple (being 14 in the drawings) solar battery cell, and it is connected in parallel further the structure that multiple (being 2 row in figure) obtain.Fig. 2 represent the solar module 2A in execution mode 1 is connected to on-off switch 13A (be using by contact and contact pin as a circuit, by least built-in for this circuit two circuit and an example of the double-pole singlethrow switch (dpst switch) that the mode of the contact pin interlock of these two circuit is formed) example, the positive input terminal 11a that this solar module 2A is corresponding with the difference being arranged on curren-collecting part 3 and negative input terminal 12 connect.
And, the positive pole of the solar module 2A of curren-collecting part 3 is connected with positive input terminal 11a and negative pole negative input terminal 12a respectively with negative pole, in addition, be provided with the 1st diode 10a and on-off switch 13A, the outlet side of on-off switch 13A is connected with positive output terminals 14 and negative output terminals 15 respectively.That is, curren-collecting part 3 utilizes on-off switch 13A to carry out open and close controlling to the generation power of solar module 2A, controls the direct current power exported from positive output terminals 14 and negative output terminals 15.
On-off switch 13A used herein using the combination of contact and contact pin as a circuit, be separately positioned in the structure of double-pole singlethrow switch (dpst switch) of the big current of positive pole route and negative pole route, comprise the extinguishing arc mechanism that the arc discharge produced when the opening and closing operations of contact and contact pin in inside is disappeared further.This extinguishing arc organization establishes becomes, at the positive pole of above-mentioned direct current power and the electrode input end sub-connection of on-off switch 13A and the negative input sub-connection of the negative pole of above-mentioned direct current power and on-off switch 13A time, arc discharge when making the operation of this switch is decayed.This extinguishing arc mechanism comprises magnetic and extinguishing arc parts, the flow direction of the electric current of this magnetic when forming this connection specifically configures, arc discharge to lead specific direction according to the position relationship of this electric current and magnetic by these extinguishing arc parts, is configured on the direction of this arc discharge.As the on-off switch possessing such function, such as, there is direct current shutter such disclosed in above-mentioned patent documentation 2.And in the curren-collecting part 3 of present embodiment 1, the 1st diode 10a connects in the mode making electric current and flow to positive input terminal 11a side from negative input terminal 12a.
In addition, the positive output terminal 14 of curren-collecting part 3 and the output of negative output terminal 15 as shown in Figure 3, are transfused to positive input terminal 16 and the negative input terminal 17 of inverter 4 respectively.Inverter 4 is based on the device of DC/AC change-over circuit, is also called PV inverter, electric governor etc.Inverter 4 direct current power is converted to 50Hz to 60Hz specific alternating electromotive force, namely export with the alternating electromotive force of the alternating electromotive force same phase of source power supply system.
Be transfused to the positive input terminal 16 of inverter 4 and the direct current power of negative input terminal 17 is transfused to switch element module 18 through direct current reactor DCL.This switch element module 18 is formed as the boosting switching circuit 19 of parallel circuits and single-phase full-bridge circuit 20 respectively with transistor and fly-wheel diode, and by ICization.And the direct current outlet side of reactor DCL is connected with the input side A point of boosting switching circuit 19, between the tie point B point and C point of this boosting switching circuit 19 and full-bridge circuit 20, be connected with smmothing capacitor CON.In addition, the output point D point of full-bridge circuit 20 is connected with interchange reactor ACL respectively with E point.In addition, direct current reactor DCL uses for the large reactor of the reactance of the frequency of frequency 50Hz to 60Hz with reactor ACL with exchanging, and smmothing capacitor CON also uses the capacitor of bulky capacitor.
Herein, be made up of the DC/DC converter circuit (Converter circuit) of booster type direct current reactor DCL, boosting switching circuit 19 and smmothing capacitor CON, exchanged with a pair by full-bridge circuit 20 and form DC/AC converter circuit with reactor ACL.In addition, be used for except denoising with the interchange capacitor Xc that the outlet side of reactor ACL is connected.These boostings with switching circuit 19 and full-bridge circuit 20 according to the signal controlling from other control circuit, but their concrete control mode does not affect action of the present utility model, can use common mode, description is omitted.
In addition, from a pair interchange interchange Output rusults a pair AC output terminal 21 of reactor ACL, 22, connect relay 5, be connected to load 6 and source power supply system 7 (with reference to Fig. 1).
Herein, be described with reference to the function of Fig. 2 to the 1st diode 10a.Connect solar module 2A usually to be undertaken by different operators with the person of setting arranging solar module 2A from the electrical construction personnel of curren-collecting part 3.Therefore, there is operator to mistake, the positive pole of solar module 2A and negative pole are connected to the positive input terminal 11 of curren-collecting part 3 and the situation of negative input terminal 12a mistakenly, on the contrary.
When having carried out such mistake and having connected, if forms the circulating current of direct current at the circuit of the side is connected with positive output terminal 14 and negative output terminal 15, then due to the contact pin of closedown on-off switch 13A at on-off switch 13A flowing big current.If make the contact pin of on-off switch 13A leave from contact in this condition, then between the contact and contact pin of the inside of on-off switch 13A, produce arc discharge.This arc discharge makes in the sense of current of on-off switch 13A flowing contrary with design direction, therefore, the direction of the arc discharge caused due to the effect of the magnetic of extinguishing arc mechanism becomes rightabout with situation about the positive pole of solar module 2A and negative pole being correctly connected, extinguishing arc mechanism does not play a role, consequently, there is the situation that arc discharge does not reduce, proceeds arc discharge.When arc discharge continues in on-off switch 13A, become high temperature in on-off switch 13A, the possibility that on-off switch 13A breaks down becomes large.
But in the alternating electromotive force feed system 1 of execution mode 1, the 1st diode 10a connects to make electric current flow to positive input terminal 11a side mode from the negative input terminal 12 of curren-collecting part 3.When possessing such structure, when positive pole and the negative pole of solar module 2A are correctly connected with the positive input terminal 11a of curren-collecting part 3 and negative input terminal 12a, not streaming current in the 1st diode 10a, the input impedance that there is not on-off switch 13A such as to change at the impact.But, when positive pole and the negative pole of solar module 2A are connected on the contrary with the positive input terminal 11a of curren-collecting part 3 and negative input terminal 12a, the solar module 2A that this connects on the contrary became the state be shorted by the 1st diode before on-off switch 13A, not to on-off switch 13A streaming current.Therefore, at on-off switch 13A, do not flow when operating the contact pin of on-off switch 13A and can cause the electric current of arc discharge.
[variation 1,2]
The curren-collecting part 3A of the variation 1 shown in Fig. 4 be make solar module be solar module 2A ~ 2D 4 row situations.The curren-collecting part 3A of variation 1 not only comprises on-off switch 13A ~ 13D, positive input terminal 11a ~ 11d, negative input terminal 12a ~ 12d, with the 1st diode 10a ~ 10d making electric current connect from the mode that negative input terminal 12a ~ 12d flows to positive input terminal 11a ~ 11d side, and is included in the structure inserting the 2nd diode 23a ~ 23d between the positive output contact side of on-off switch 13A ~ 13D and positive output terminal 14 by forward (clockwise direction) respectively as the curren-collecting part 3 of execution mode 1.In addition, the curren-collecting part 3B of variation 2 is different from variation 1, by the 2nd diode 23e ~ 23h by being inserted into respectively between the negative output contact side of on-off switch 13A ~ 13D and negative output terminal 15 in the other direction.
When possessing such structure, when the positive pole of the arbitrary module by solar module 2A ~ 2D is connected with negative pole by mistake, by the 1st diode 10a ~ 10d streaming current, at on-off switch 13A ~ 13D not streaming current, so do not produce arc discharge in on-off switch 13A ~ 13D.But, if there is the output of other solar module to enter the 1st diode 10a ~ 10d, then there is diode and break down, the situation of such as clear failure, in this case, the protection that the mistake can not carrying out solar module connects.In order to prevent entering of this output, be provided with the 2nd diode 23a ~ 23h.
[execution mode 2]
Fig. 6 represents the power inverter 24 of the execution mode 2 of the input current as the structure shown in the input circuit use variation 1 of inverter 4.Namely, the power inverter 24 of execution mode 2 when the positive output terminals 14 of the variation 1 (also can delete diode 10a ~ 10d) shown in Fig. 4 and negative output terminals 15 are connected to positive input terminal 16 and the negative input terminal 17 of the inverter 4 shown in Fig. 3, through comprising the input circuit of on-off switch 13E and the 1st diode 10e in addition.
On-off switch 13E is same with the situation of above-mentioned on-off switch 13A ~ 13D possesses the extinguishing arc mechanism that arc discharge is decayed.1st diode 10e is electrically connected in the mode making electric current and flow to positive input terminal 11e from the negative input terminal 12e of this on-off switch 13E.Preferably 2 power inverter 24 in, same with the situation of the input current of the mechanism shown in above-mentioned variation 1, also prevent when making that the positive output terminals 14 of curren-collecting part 3 is connected to negative input terminal 17, negative output terminals 15 is connected to positive input terminal 16 mistakenly, at on-off switch 13E streaming current.
In addition, although form the cycling circuit that fly-wheel diode through being arranged in parallel with the switch element of the switching circuit 19 of boosting section of the direct current power that is applied to negative input terminal 17 and direct current reactor DCL are back to positive input terminal 16, become the current path when the contact pin of on-off switch 13E is closed, but by the 1st diode 10e, not streaming current in this cycling circuit.
Claims (5)
1. an input circuit, is characterized in that:
Be connected having positive pole accordingly with each input terminal of the double-pole singlethrow switch (dpst switch) with positive input terminal and negative input with the direct current power of negative pole, wherein
Described double-pole singlethrow switch (dpst switch) have at the positive pole of described direct current power and electrode input end sub-connection and the negative pole of described direct current power and negative input sub-connection time, extinguishing arc mechanism that arc discharge during this switching manipulation is decayed, and be electrically connected with diode from described negative input terminal to the direction of described positive input terminal streaming current.
2. input circuit as claimed in claim 1, is characterized in that:
The booster circuit with reactor, switch element, rectifier diode and capacitor is connected at the connecting terminals of the outlet side of described double-pole singlethrow switch (dpst switch),
The fly-wheel diode of the energising can carrying out the direction contrary with sense of current during this switch element action is arranged in parallel with described switch element.
3. input circuit as claimed in claim 1 or 2, is characterized in that:
Described direct current power is the electric power utilizing solar cell to send.
4. a power inverter, is characterized in that:
By after input circuit input direct-current electric power, utilize booster circuit to boost its voltage, utilize inverter circuit to be converted to alternating electromotive force and be supplied to load, wherein
The positive pole of described direct current power is connected with negative pole each input terminal with the double-pole singlethrow switch (dpst switch) with positive input terminal and negative input by described input circuit accordingly,
Described double-pole singlethrow switch (dpst switch) have at the positive pole of described direct current power and described electrode input end sub-connection and the negative pole of described direct current power and described negative input sub-connection time, extinguishing arc mechanism that arc discharge during this switching manipulation is decayed, and be electrically connected with diode from described negative input terminal to the direction of described positive input terminal streaming current
Described booster circuit has reactor, switch element, rectifier diode and capacitor,
The fly-wheel diode of the energising in the direction that sense of current when being arranged in parallel with described switch element the action can carried out with this switch element is contrary.
5. power inverter as claimed in claim 4, is characterized in that:
Described direct current power is the electric power utilizing solar cell to send.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2012/071940 WO2014033868A1 (en) | 2012-08-30 | 2012-08-30 | Input circuit and power conversion apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204614723U true CN204614723U (en) | 2015-09-02 |
Family
ID=50182718
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201290001291.0U Expired - Lifetime CN204614723U (en) | 2012-08-30 | 2012-08-30 | Input circuit and power inverter |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP5903593B2 (en) |
| CN (1) | CN204614723U (en) |
| WO (1) | WO2014033868A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108695963A (en) * | 2017-03-30 | 2018-10-23 | 本田技研工业株式会社 | Generator of engine |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3252562B1 (en) * | 2015-01-28 | 2019-12-25 | Kyocera Corporation | Electric power control device, electric power control system, and electric power control method |
| JP6934634B2 (en) * | 2017-03-30 | 2021-09-15 | パナソニックＩｐマネジメント株式会社 | Electrical equipment, power conversion systems, and terminal blocks |
| KR102224181B1 (en) * | 2020-09-15 | 2021-03-09 | 주식회사 디케이 | Dc circuit breaker for photovoltaic system |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63131541U (en) * | 1987-02-17 | 1988-08-29 | ||
| JPH0945948A (en) * | 1995-07-27 | 1997-02-14 | Fuji Electric Co Ltd | Solar cell module |
| JP2000173376A (en) * | 1998-12-03 | 2000-06-23 | Kawamura Electric Inc | Solar battery switch |
| JP4693256B2 (en) * | 2001-02-02 | 2011-06-01 | シャープ株式会社 | Booster unit |
| JP5632304B2 (en) * | 2011-01-27 | 2014-11-26 | 富士電機株式会社 | Circuit breaker for wiring and DC power system |
-
2012
- 2012-08-30 JP JP2014532644A patent/JP5903593B2/en not_active Expired - Fee Related
- 2012-08-30 CN CN201290001291.0U patent/CN204614723U/en not_active Expired - Lifetime
- 2012-08-30 WO PCT/JP2012/071940 patent/WO2014033868A1/en active Application Filing
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108695963A (en) * | 2017-03-30 | 2018-10-23 | 本田技研工业株式会社 | Generator of engine |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2014033868A1 (en) | 2014-03-06 |
| JP5903593B2 (en) | 2016-04-13 |
| JPWO2014033868A1 (en) | 2016-08-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8537581B2 (en) | Power converter system and methods of operating a power converter system | |
| CN106877311B (en) | A kind of direct current photovoltaic generating system | |
| CN109066798B (en) | Shutoff device of photovoltaic module | |
| US20130049478A1 (en) | Power system, method of operation thereof, and controller for operating | |
| CN106992550B (en) | Control device and collection flow box | |
| US20140103724A1 (en) | Bidirectional power system, operation method, and controller for operating | |
| JP6124909B2 (en) | Single-phase inverter controlled cooperatively to supply single-phase, two-phase or three-phase unipolar electricity | |
| CN113629757A (en) | Energy storage device, energy storage device control method and photovoltaic system | |
| CN204614723U (en) | Input circuit and power inverter | |
| CN215498288U (en) | But short-circuit protection's power optimizer and photovoltaic power generation system | |
| CN203071637U (en) | DC power supply connection control apparatus | |
| JP2014068504A (en) | Distribution panel and distributed power supply system | |
| CN103001313B (en) | Off-line uninterrupted power system | |
| CN112072741B (en) | Method and device for realizing one-key starting of household energy storage system | |
| JP2011078237A (en) | Power supply system | |
| CN203466613U (en) | Household off-network light-storage supplementary electricity generation system compatible with multiple types of energy-storage systems | |
| JP2014050292A (en) | Distributed power supply system, and autonomous operation control device | |
| JP2017118598A (en) | Power supply system | |
| JP2014117086A (en) | System interconnection system | |
| CN202906774U (en) | High-power photovoltaic inverter with automatic power-off auxiliary power supply circuit | |
| JP2012105504A (en) | Dc power supply system | |
| CN210074772U (en) | Multi-node switching intelligent micro-grid experimental system | |
| US20130182474A1 (en) | Power conversion device for solar energy generating system | |
| CN204651939U (en) | The quick shutdown unit of a kind of inverter | |
| CN204118734U (en) | PV air-conditioner power supply circuits and PV air-conditioner |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20150902 |