CN203645326U - Electronic type APF/SVG soft starting device - Google Patents
Electronic type APF/SVG soft starting device Download PDFInfo
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- CN203645326U CN203645326U CN201320659997.2U CN201320659997U CN203645326U CN 203645326 U CN203645326 U CN 203645326U CN 201320659997 U CN201320659997 U CN 201320659997U CN 203645326 U CN203645326 U CN 203645326U
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- 238000002955 isolation Methods 0.000 claims description 6
- 238000011084 recovery Methods 0.000 claims description 2
- 238000004146 energy storage Methods 0.000 abstract description 2
- 230000002035 prolonged effect Effects 0.000 abstract 1
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- 238000010438 heat treatment Methods 0.000 description 4
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- 230000015556 catabolic process Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000009658 destructive testing Methods 0.000 description 1
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- 230000001939 inductive effect Effects 0.000 description 1
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- 229910044991 metal oxide Inorganic materials 0.000 description 1
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- 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
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/10—Flexible AC transmission systems [FACTS]
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- 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
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/20—Active power filtering [APF]
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Abstract
The utility model discloses an electronic type APF/SVG soft starting device comprising a soft starting rectification circuit, an IGBT and energy storage capacitor, a UC end voltage detection circuit, a soft starting voltage upper limit, a soft starting voltage lower limit, a soft starting completion checking driving circuit, a soft starting current and fault current detection circuit, and a main circuit closing permitting driving circuit. By using the electronic type APF/SVG soft starting device, the operation of the main circuit is rejected, before the soft starting is completed. The operation of the main circuit can be started in a time-delay manner, after the short circuit detection or the circuit breaking detection and other fault detection is completed, and therefore the safe and reliable operation of the devices can be realized. The electronic type APF/SVG soft starting device is advantageous in that the design costs can be reduced, and the service lifetime of the device can be prolonged.
Description
Technical field
The utility model relates to the soft circuit that opens of a kind of APF/SVG, relates in particular to a kind of electronic type APF/SVG soft starting device.
Background technology
For APF/SVG(Active Power Filter-APF/static reacance generator) the soft circuit that opens, general way utilizes high-power resistance for master exactly at present, coordinates other auxiliary circuits, reduces the way of charging current and carries out APF or SVG soft start.Some utilizations separately add the lower-powered soft resistance that opens of A.C. contactor series connection and carry out soft opening, also have with directly soft the opening of charging and cause vibration switching or make the soft blast of opening of A.C. contactor control rectifier.These methods, in the situation that there is no T-shape high-frequency filter capacitor, also reluctantly can.But with removing T-shape filter circuit, making IGBT(insulated gate bipolar transistor) directly to touch into electrical network be cost for the high frequency ripple electric current that produces, is a kind of irresponsible design inferior.In order to stop high frequency ripple electric current to touch into electrical network, preferably add " LC " T-shape filter.What wherein high-frequency filter capacitor capacity can not select again is too small, and Ic is as being less than 10A, and filter effect is just very not obvious.
T-shape filtering of the prior art is as shown in Figure 7:
In Fig. 7, C is high-frequency filter capacitor, and R is the soft resistance that opens, and L1 is PWM output smoothing reactor, and L2 is electrical network reactor, and L3 is High frequency filter inductance.
As because certain CJ0-1～3, reason main contactor contact disconnect, Ic electric current is 10A, and the electric current that flows through resistance R is also 10A, establishes R=30 Ω, according to formula:
P
R=I
2R=10×10×30=3KW
Obtain the soft active power that opens resistance consumption of three-phase:
P
always=3P
r=3 × 3=9KW
So large consumed power has not only been wasted the energy of national preciousness, how has also been equivalent to 3 electrothermal furnaces cabinet is additionally generated heat.
Utility model content
The purpose of this utility model is to provide the electronic type APF/SVG soft starting device that a kind of security of operation, cost are low, the life-span is long.
The purpose of this utility model is achieved through the following technical solutions:
Electronic type APF/SVG soft starting device of the present utility model, the two-phase of electrical network is connected with IGBT and storage capacitor by soft start rectification circuit, between in the two-phase of described electrical network one and described soft start rectification circuit, be connected with flow fuse and the soft normally opened contact that opens A.C. contactor, between described soft start rectification circuit and IGBT and storage capacitor, be connected with the soft normally opened contact that opens A.C. contactor;
Described IGBT and storage capacitor are connected with UC terminal voltage testing circuit, described UC terminal voltage testing circuit opens upper voltage limit and the soft lower voltage limit that opens is connected respectively with soft, whether the described soft upper voltage limit that opens completes drive circuit and is connected with soft opening respectively with the soft lower voltage limit that opens, and whether described soft opening completes drive circuit and be connected with the first relay;
In the two-phase of described electrical network one soft electric current and the fault current detection circuit of opening that be coupled, whether describedly softly open electric current and fault current detection circuit and allow main circuit combined floodgate drive circuit to be connected and be provided with fault-signal output, the described main circuit combined floodgate drive circuit that whether allows is connected with the second relay.
The technical scheme being provided by above-mentioned the utility model can be found out, the electronic type APF/SVG soft starting device that the utility model embodiment provides, owing to comprising, soft start rectification circuit, IGBT and storage capacitor, UC terminal voltage testing circuit, soft upper voltage limit and the soft lower voltage limit that opens of opening, whether soft opening completes drive circuit, soft electric current and the fault current detection circuit of opening, whether allow main circuit combined floodgate drive circuit, can before soft having opened, refuse main circuit puts into operation, until the equipment that detects really puts main circuit into operation without time delay after short circuit or the fault such as open circuit, really accomplish the safe and reliable operation of equipment.Meanwhile, reduce design cost, improved the operation time limit of equipment.
Brief description of the drawings
The structured flowchart of the electronic type APF/SVG soft starting device that Fig. 1 provides for the utility model embodiment;
Fig. 2 is load current observing and controlling block diagram in the utility model embodiment;
Fig. 3 is electronic type APF/SVG soft starting circuit schematic diagram in the utility model embodiment;
Fig. 4 is that in the utility model embodiment, soft starting circuit drops into, exits ac contactor coil control circuit winding diagram;
Fig. 5 is the sound-deadening electricity-saving controlling party block diagram that in the utility model embodiment, the main A.C. contactor of APF/SVG main circuit switching changes low-voltage direct operation into;
Fig. 6 is the concrete elementary diagram of sound-deadening electricity-saving control contactor in the utility model embodiment;
Fig. 7 is soft start resistance of the prior art and high frequency filter schematic diagram.
Embodiment
To be described in further detail the utility model embodiment below.
Electronic type APF/SVG soft starting device of the present utility model, its preferably embodiment be:
The two-phase of electrical network is connected with IGBT and storage capacitor by soft start rectification circuit, between in the two-phase of described electrical network one and described soft start rectification circuit, be connected with flow fuse and the soft normally opened contact that opens A.C. contactor, between described soft start rectification circuit and IGBT and storage capacitor, be connected with the soft normally opened contact that opens A.C. contactor;
Described IGBT and storage capacitor are connected with UC terminal voltage testing circuit, described UC terminal voltage testing circuit opens upper voltage limit and the soft lower voltage limit that opens is connected respectively with soft, whether the described soft upper voltage limit that opens completes drive circuit and is connected with soft opening respectively with the soft lower voltage limit that opens, and whether described soft opening completes drive circuit and be connected with the first relay;
In the two-phase of described electrical network one soft electric current and the fault current detection circuit of opening that be coupled, whether describedly softly open electric current and fault current detection circuit and allow main circuit combined floodgate drive circuit to be connected and be provided with fault-signal output, the described main circuit combined floodgate drive circuit that whether allows is connected with the second relay.
Be to prevent that soft APF/SVG main circuit mistake from putting into operation in advance in opening process from the soft effect of opening electric current of electrical network, described soft normally opened contact effect of opening A.C. contactor is soft circuit and the APF/SVG main circuit of opening of isolation APF/SVG.
Described soft start rectification circuit comprises bridge rectifier, and the output of described bridge rectifier is connected with respectively anti-recoiling and hits diode and the soft current-limiting resistance that opens.
Described IGBT and storage capacitor comprise storage capacitor and three phase full bridge fly-wheel diode.
Described UC terminal voltage testing circuit comprises divider resistance and detects the Hall voltage transducer of storage capacitor terminal voltage.
The described soft upper voltage limit that opens comprises that direct voltage isolation and anti-jamming circuit, the soft upper voltage limit that opens exit circuit, upper limit isolating diode and the upper limit and exit delay circuit.
The described soft lower voltage limit that opens comprises that soft soft circuit, lower limit isolating diode and the lower limit of opening of lower voltage limit recovery that open recovers the soft delay circuit that opens.
Whether described soft opening completes drive circuit and comprises the soft circuit switching drive circuit that opens.
Describedly softly open electric current and fault current detection circuit comprises operational amplifier, divider resistance, setting potentiometer, anti-interference capacitor, isolating diode.
The described main circuit combined floodgate drive circuit that whether allows comprises time-base circuit, time delay discharge resistance, delay capacitor.
" the soft opening device of electronic type APF/SVG " of the present utility model solved problems of the prior art, and indices has all reached desired design target after thousands of destructive testings.
No matter be passive filter PPF, or active filter SVC, SVG or APF+SVG, in electrical network, moving, unique requirement is exactly energy savings reliable and truly.SVC(switched virtual circuit (SVC)) system not only self had produced a large amount of harmonic waves but also had consumed a large amount of preciousnesses function source, SVG has improved major step in performance than SVC, but smoothing reactor, IGBT heating in SVG, and main contactor contact can cause the soft resistance heating that opens after disconnecting, need consume active power in order to reduce the air-cooled or water cooling equipment that device temperature additionally adds.
The utility model is out of service in light hours SVG system, makes the heater element of complete equipment all in resting state, substantially consumed power (high ferro etc. are intermittent duty state for for example subway, market) not.Utilizing high accuracy BiMOS(bipolar metal-oxide semiconductor) operational amplifier is as telemetry circuit control.Before soft having opened, refuse main circuit and put into operation, until the equipment that detects really puts main circuit into operation without time delay after short circuit or the fault such as open circuit, really accomplish the safe and reliable operation of equipment.Meanwhile, reduce design cost, replaced the high-power consumable electrode type resistance device of thousands of units with hundred yuan of electronic devices, improved the operation time limit of equipment.
Re-set target of the present utility model is:
1, on-the-spot setting will not start lower than the light hours, load in service stop or during lower than light load set point main circuit out of service, complete equipment is all in resting state, just do not exist and send the situation of capacitive reactive power electric current (in former SVG during with T-shape filter capacitor yet, after main circuit ac contactor contact disconnects, open the meritorious electric power of resistance consumption 10KW except soft, during without inductive load, capacitance current can make electric power gauge " just " turn, make user increase very large electric cost expenditure, in pure condenser network, because of 90 ° of capacitance current leading voltages cause anti-idle, can be doubled fine).
2, soft opening in process, in the time that storage capacitor DC terminal voltage does not reach capping value, no matter the time how long, main contactor also never allow close a floodgate (with prevent soft open also do not exit start time, main contactor because of DSP send allow reclosing command make IGBT produce high-frequency current cause soft recoil of opening circuit is hit).
3,, in the time that electrical network or equipment itself have fault, main contactor does not allow to close a floodgate.
4, not only consumed power but also the main A.C. contactor of large electric current that makes a noise are changed into sound-deadening electricity-saving operation, thoroughly abate the noise, consumed power reduces by 95%.
5, reduce manufacturing cost more than 90%, thoroughly solve soft not only consumed power but also the serious problem of heating of resistance that open, improve equipment reliability of operation.
Specific embodiment:
As shown in Figures 1 to 7, the effect of " electronic type APF/SVG soft start " circuit working process and each element is:
Fig. 1 is in conjunction with shown in Fig. 3, and the soft voltage source that opens is taken from electrical network A phase and B phase.It is soft that to open electric current CT1 effect be to prevent that soft APF/SVG main circuit mistake from putting into operation in advance in opening process.The soft normally opened contact CJ1-1 that opens A.C. contactor, CJ1-3, CJ1-5 effect is soft circuit and the APF/SVG main circuit of opening of isolation.
If Fig. 1 is in conjunction with in the soft start rectification circuit as shown in Fig. 3:
FU: cross flow fuse, D1～4: rectifier diode, D5: anti-recoiling hit diode, RH: the soft current-limiting resistance that opens.
The storage capacitor that in Fig. 1 block diagram, " IGBT and storage capacitor " is APF/SVG in conjunction with Fig. 3: C0, soft having opened mainly maintains it with the three phase full bridge fly-wheel diode of IGBT and is greater than electrical network crest voltage afterwards.
In Fig. 1 block diagram, in " UC terminal voltage testing circuit ", be divider resistance in conjunction with Fig. 3: R0, PT is the Hall voltage transducer that detects storage capacitor terminal voltage.
In Fig. 1 block diagram, " the soft upper voltage limit that opens " is in conjunction with Fig. 3: direct voltage isolation and the anti-jamming circuit of diode D6 and capacitor C5 composition PT output.With operational amplifier IC1, divider resistance R1, R2, and the soft upper voltage limit that opens of higher limit setting potentiometer W1 composition exits circuit.D7 is upper limit isolating diode, and capacitor C1 and resistance R 3 form the upper limit and exit delay circuit.
In Fig. 1 block diagram " the soft lower voltage limit that opens " in conjunction with Fig. 3, with operational amplifier IC3, divider resistance R6 and lower limit are set the soft lower voltage limit that opens of potentiometer W2 composition and are recovered the soft circuit that opens.D11 is lower limit isolating diode, and capacitor C6 and resistance R 9 form lower limit and recover the soft delay circuit that opens.
In Fig. 1 block diagram " whether soft opening completes drive circuit " in conjunction with Fig. 3, with time-base circuit IC5, capacitor C 2 forms the soft circuit switching drive circuit that opens.
Fig. 1 block diagram repeat circuit J1 is in conjunction with Fig. 3 Fig. 4: when U0 terminal voltage drops to lower voltage limit value, IC1, IC3 export " 0 " current potential, the terminal 2 of IC5, terminal 5 is " 0 " current potential, terminal 3 is exported " 1 " current potential, and relay J 1 is failure to actuate, and its normally-closed contact J1 is in closure state, when load has electric current, the normally-closed contact of relay J 3-1 is also in closure state, and the soft A.C. contactor CJ1 that opens moves, its normally opened contact CJ1-1, CJ1-3, CJ1-5 is closed into the soft operating state that opens.
In like manner, soft when opening voltage U 0 terminal voltage and being elevated to upper limit set value, IC5 exports " 0 " current potential, and relay J 1 is moved, and its normally-closed contact J1 disconnects, and CJ1 discharges, its normally opened contact CJ1, and CJ3, CJ5 is in normally open, soft having opened.
In Fig. 1 block diagram, " fault-signal " is the various fault output signals of APF/SVG complete equipment, with the soft signal composition OR-circuit that opens electric current CT1 output, is the soft signal rectification diode that opens in conjunction with Fig. 3 D8, and D9 is fault-signal diac.
In Fig. 1 block diagram " soft electric current and the fault current detection circuit of opening " in conjunction with Fig. 3, by operational amplifier IC2, divider resistance R4, sets potentiometer W3, anti-interference capacitor C3, isolating diode D10 composition.
In Fig. 1 block diagram, " whether allow main circuit combined floodgate drive circuit " in conjunction with Fig. 3: by time-base circuit IC7, time delay discharge resistance R5, delay capacitor C4 and capacitor C10 composition.
In conjunction with the effect of Fig. 3 relay J 2 be soft open process in IC7 terminal 3 export " 0 " current potential, J2 action.Or equipment is while having fault, the terminal 3 of IC7 is exported " 0 " current potential too, and J2 moves too, and its normally-closed contact J2 disconnects, even APF controller output AC220V voltage, main contactor CJ0 can not put into operation.
In Fig. 2 block diagram: load current mutual-inductor " CT2 ", " load current detection ", " whether allowing switching drive circuit " and relay J 3, in conjunction with Fig. 3: diode D12 and capacitor C7 composition load current rectification and anti-jamming circuit.Operational amplifier IC4, resistance R 7, the load current testing circuit that R8 and potentiometer W4 composition allow complete equipment to drop into or exit.D13 is isolating diode.
By IC6, C8, C9 and R10 composition allow the soft main circuit switching drive circuit that opens or allow.
The effect of relay J 3 is: before equipment investment, if load current is set current value lower than minimum, IC4 exports " 0 " current potential, IC6 terminal 2 and terminal 6 are " 0 " current potential, and the output terminal 3 of IC6 is " 1 " current potential, J3 action, its normally-closed contact J3-1, J3-2 disconnects.The soft contactor CJ1 that opens, APF/SVG main contactor CJ0 does not all work.In like manner there is large load to exit or during lower than minimum running current in load side, J3-1, J3-2 all disconnects, and complete equipment is out of service.
If APF/SVG is in holding state, load current is increased to while needing compensating coefficient, and IC4 exports " 1 " current potential, IC6 exports " 0 " current potential, current vanishes in relay coil J3, its contact J3-1, J3-2 recovers normally off, and follow procedure recovers normal compensating coefficient.
In Fig. 5 block diagram in conjunction with Fig. 6: J2: be allow switching relay contact, J3-2 is that light load exits below, drops into the normally-closed contact of relay J 3 while having load current.
B: be 5W/220V/8V miniature transformer, D0: be the combined floodgate diode of main contactor CJ0, D01: be DC8V full-bridge rectifier, CJ0-2 is the normally closed auxiliary contact of CJ0, after closing a floodgate, CJ0-2 auxiliary contact disconnect, CJ0-1 auxiliary contact closure, DC low-voltage maintains CJ0 in attracting state, reaches the object of the thorough cancellation coil heating of sound-deadening electricity-saving.
CJ0: be main contactor coil, AC220V-380V specification coil all can.(A.C. contactor In >=200A～630A, sound-deadening electricity-saving effect is best)
Below in conjunction with Fig. 3, Fig. 4, Fig. 6, operation logic of the present utility model is described further:
At complete equipment initial operating stage, storage capacitor both end voltage is very low, IC1, and the in-phase input end of IC3 is " 0 " current potential, and terminal 2 trigger ends of IC5 and terminal 6 threshold value ends are also " 0 " current potential, IC5 output " 1 " some position.Relay J 1 is failure to actuate, and its contact J1 is in closure state, and as load current is greater than while needing offset current, IC4 exports " 1 " current potential, and IC6 exports " 0 " current potential.Relay J 3 is also failure to actuate, its normally-closed contact J3-1, and J3-2 is closure state.The soft A.C. contactor CJ1 that opens works, its isolation normally opened contact CJ1-1, and CJ1-3, CJ1-5 is all closed, and soft breakdown begins.Along with energy storage capacitor C0 both end voltage increases gradually, first IC3 exports " 1 " current potential, makes the terminal 2 of IC5 become " 1 " current potential, until the in-phase input end current potential of IC1 is during higher than its inverting input set point, IC1 exports " 1 " current potential, and when the terminal 6 threshold value ends of IC5 and terminal 2 trigger ends are all greater than 2/3VCC, IC5 exports " 0 " current potential, relay J 1 is moved, its contact J1 disconnects, the normally opened contact CJ1-1 of A.C. contactor CJ1, CJ1-3, CJ1-5 all disconnects, and softly opens end.
Whole soft open process in Current Transmit 1 have all the time electric current to flow through, make the in-phase input end of IC2 be placed in " 1 " current potential through D8 rectification, terminal 2 terminals 6 of IC7 are " 1 " current potential, IC5 exports " 0 " current potential, the J2 of relay action, its contact J2 disconnects.In like manner; soft open process in as measure complete equipment just like faults such as electric leakages; it is " 1 " current potential that fault-signal enters the in-phase input end that D9 diode rectification makes IC2 equally; IC7 exports " 0 " current potential; the normally-closed contact J2 of relay J 2 disconnects; even if APF controller sends reclosing command, complete equipment also can not put into operation (when APF/SVG integrated protection is separately applied for a patent describe in detail)
Main circuit combined floodgate program:
Combined floodgate condition: 1. the output current of CT2 load current mutual-inductor is greater than permission compensation load current value (it is W4 potentiometer that set point is adjusted element)
2. fault-free signal
3. the soft circuit that opens exits (detecting element is CT1) really
As above-mentioned combined floodgate condition all reaches, through IC7 exit delay circuit C4, R5 time delay, relay J 2 resets, its contact J2 recovers closure state.The normally-closed contact J3-2 that is greater than set point J3 because of load current is closed, and controller is as sent switching signal voltage AC220V time, and after sound-deadening electricity-saving device diode closes a floodgate, CJ0-2 disconnects, and CJ0-1 closure, enters APF/SVG compensating coefficient.
Quit a program:
There is phase shortage as equipment complete equipment is in service, when the faults such as electric leakage, D9 conducting, IC2 exports " 1 " current potential, and IC7 exports " 0 " current potential, J2 action, its normally-closed contact disconnects, and equipment is out of service.
In like manner, in the time that the line current of need compensation drops to lower than set point, CT2 load current mutual-inductor no-output, the cut-off of D12 diode, operational amplifier IC4 exports " 0 " current potential, time-base circuit IC6 exports " 1 " current potential, relay J 3 is moved, its normally opened contact J3-1, and J3-2 is all in off-state, complete equipment out of service (for example: subway system, the 23:00-at night of megastore early 5:00 in underrun state).Until load current is while recovering normal,--soft start exits--soft opening exited time delay to repeat above-mentioned soft start, enters normal compensating coefficient.
Storage capacitor terminal voltage holding circuit:
APF/SVG is normally in service, although there is no fault, load current is also very large, but load character is resistive, COS φ is now close to 1 ,-need not compensate, sometimes APF/SVG is placed in that APF compensating coefficient harmonic wave is substantially qualified also need not be compensated, now APF/SVG may be out of service in the short time, in order to ensure the quick input compensation state of APF/SVG, must ensure that C0 terminal voltage is maintained within a certain range.
The process that C0 terminal voltage maintains:
After APF/SVG normally exits, this life circle, general circuit was: see Fig. 7.Change into after electronic type soft start, because of logical without soft resistance structure, storage capacitor terminal voltage can because of and the slowly electric discharge in parallel of Hall voltage instrument transformer primary circuit.Adjust C0 lower voltage limit value W2 potentiometer, set lower than inverting input to the in-phase input end current potential of IC3 potential value time, IC3 exports " 0 " current potential, it is the terminal 5 of IC5, terminal 6 current potentials are during lower than 1/3VCC, IC5 exports " 1 " current potential, relay J 1 resets, its normally-closed contact J1 is in closure state, start the soft circuit that opens and make C0 terminal voltage rising, adjust C0 upper voltage limit value potentiometer W1, the in-phase input end current potential that rises to IC1 to C0 both end voltage is during higher than the inverting input of IC1, IC1 exports " 1 " current potential, to the terminal 2 of IC5, terminal 6 current potentials are during higher than 2/3VCC, IC5 exports " 0 " current potential, relay J 1 is moved, the soft process that opens finishes.
The above; it is only preferably embodiment of the utility model; but protection range of the present utility model is not limited to this; any be familiar with those skilled in the art the utility model disclose technical scope in; the variation that can expect easily or replacement, within all should being encompassed in protection range of the present utility model.Therefore, protection range of the present utility model should be as the criterion with the protection range of claims.
Claims (9)
1. an electronic type APF/SVG soft starting device, it is characterized in that, the two-phase of electrical network is connected with IGBT and storage capacitor by soft start rectification circuit, between in the two-phase of described electrical network one and described soft start rectification circuit, be connected with flow fuse and the soft normally opened contact that opens A.C. contactor, between described soft start rectification circuit and IGBT and storage capacitor, be connected with the soft normally opened contact that opens A.C. contactor;
Described IGBT and storage capacitor are connected with UC terminal voltage testing circuit, described UC terminal voltage testing circuit opens upper voltage limit and the soft lower voltage limit that opens is connected respectively with soft, whether the described soft upper voltage limit that opens completes drive circuit and is connected with soft opening respectively with the soft lower voltage limit that opens, and whether described soft opening completes drive circuit and be connected with the first relay;
In the two-phase of described electrical network one soft electric current and the fault current detection circuit of opening that be coupled, whether describedly softly open electric current and fault current detection circuit and allow main circuit combined floodgate drive circuit to be connected and be provided with fault-signal output, the described main circuit combined floodgate drive circuit that whether allows is connected with the second relay.
2. electronic type APF/SVG soft starting device according to claim 1, is characterized in that, described soft start rectification circuit comprises bridge rectifier, and the output of described bridge rectifier is connected with respectively anti-recoiling and hits diode and the soft current-limiting resistance that opens.
3. electronic type APF/SVG soft starting device according to claim 1, is characterized in that, described IGBT and storage capacitor comprise storage capacitor and three phase full bridge fly-wheel diode.
4. electronic type APF/SVG soft starting device according to claim 1, is characterized in that, described UC terminal voltage testing circuit comprises divider resistance and detects the Hall voltage transducer of storage capacitor terminal voltage.
5. electronic type APF/SVG soft starting device according to claim 1, is characterized in that, the described soft upper voltage limit that opens comprises that direct voltage isolation and anti-jamming circuit, the soft upper voltage limit that opens exit circuit, upper limit isolating diode and the upper limit and exit delay circuit.
6. electronic type APF/SVG soft starting device according to claim 1, is characterized in that, the described soft lower voltage limit that opens comprises that soft soft circuit, lower limit isolating diode and the lower limit of opening of lower voltage limit recovery that open recovers the soft delay circuit that opens.
7. electronic type APF/SVG soft starting device according to claim 1, is characterized in that, whether described soft opening completes drive circuit and comprise the soft circuit switching drive circuit that opens.
8. electronic type APF/SVG soft starting device according to claim 1, is characterized in that, describedly softly opens electric current and fault current detection circuit comprises operational amplifier, divider resistance, setting potentiometer, anti-interference capacitor, isolating diode.
9. electronic type APF/SVG soft starting device according to claim 1, is characterized in that, the described main circuit combined floodgate drive circuit that whether allows comprises time-base circuit, time delay discharge resistance, delay capacitor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320659997.2U CN203645326U (en) | 2013-10-24 | 2013-10-24 | Electronic type APF/SVG soft starting device |
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| CN201320659997.2U CN203645326U (en) | 2013-10-24 | 2013-10-24 | Electronic type APF/SVG soft starting device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103532146A (en) * | 2013-10-24 | 2014-01-22 | 北京华东电气股份有限公司 | Electronic APF/SVG soft start device |
| CN107305356A (en) * | 2016-04-22 | 2017-10-31 | 比亚迪股份有限公司 | A kind of controlling switch application circuit and its fault detect guard method |
-
2013
- 2013-10-24 CN CN201320659997.2U patent/CN203645326U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103532146A (en) * | 2013-10-24 | 2014-01-22 | 北京华东电气股份有限公司 | Electronic APF/SVG soft start device |
| CN103532146B (en) * | 2013-10-24 | 2015-06-17 | 北京华东电气股份有限公司 | Electronic APF/SVG soft start device |
| CN107305356A (en) * | 2016-04-22 | 2017-10-31 | 比亚迪股份有限公司 | A kind of controlling switch application circuit and its fault detect guard method |
| CN107305356B (en) * | 2016-04-22 | 2019-11-08 | 比亚迪股份有限公司 | A kind of control switch application circuit and its fault detection guard method |
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