CN103532146A - Electronic APF/SVG soft start device - Google Patents
Electronic APF/SVG soft start device Download PDFInfo
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- CN103532146A CN103532146A CN201310507705.8A CN201310507705A CN103532146A CN 103532146 A CN103532146 A CN 103532146A CN 201310507705 A CN201310507705 A CN 201310507705A CN 103532146 A CN103532146 A CN 103532146A
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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 invention discloses an electronic APF/SVG (Active Power Filter/Static Var Generator) soft start device which comprises a soft start rectification circuit, an IGBT (Insulated Gate Bipolar Translator) and energy storage capacitor, a UC (Umbilical Cable) terminal voltage detection circuit, a soft start voltage upper limit, a soft start voltage lower limit, a driving circuit whether accomplishing soft start, a soft start current and fault current detection circuit, and a driving circuit whether allowing to switch on a main circuit. The main circuit can be rejected to be put into operation before the soft start is accomplished, the main circuit is delayed to be put into the operation after equipment is detected to be free from faults such as a short circuit or an open circuit, and the safe and reliable operation of the equipment is achieved indeed. Simultaneously, the design cost is lowered, and the operation life of the equipment is prolonged.
Description
Technical field
The present invention relates to the soft circuit that opens of a kind of APF/SVG, relate 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, and what also have controls rectifier soft the opening of direct charging and cause vibration switching or make the soft blast of opening with A.C. contactor.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) the high frequency ripple electric current that produces directly touches into electrical network to be cost, to be 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 seven:
In figure seven, 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.
Summary of the invention
The object of this invention 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 object of the invention is to be achieved through the following technical solutions:
Electronic type APF/SVG soft starting device of the present invention, 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 is connected respectively with the soft lower voltage limit that opens with the soft upper voltage limit that opens, 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.
As seen from the above technical solution provided by the invention, the electronic type APF/SVG soft starting device that the embodiment of the present invention 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.
Accompanying drawing explanation
The structured flowchart of the electronic type APF/SVG soft starting device that figure mono-provides for the embodiment of the present invention;
Figure bis-is load current observing and controlling block diagram in the embodiment of the present invention;
Figure tri-is electronic type APF/SVG soft starting circuit schematic diagram in the embodiment of the present invention;
Figure tetra-is that in the embodiment of the present invention, soft starting circuit drops into, exits ac contactor coil control circuit winding diagram;
Figure five is the sound-deadening electricity-saving controlling party block diagram that in the embodiment of the present invention, the main A.C. contactor of APF/SVG main circuit switching changes low-voltage direct operation into;
Figure six is the concrete elementary diagram of sound-deadening electricity-saving control contactor in the embodiment of the present invention;
Figure seven is soft start resistance of the prior art and high frequency filter schematic diagram.
Embodiment
To be described in further detail the embodiment of the present invention below.
Electronic type APF/SVG soft starting device of the present invention, 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 is connected respectively with the soft lower voltage limit that opens with the soft upper voltage limit that opens, 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.
From the soft effect of opening electric current of electrical network, be to prevent that APF/SVG main circuit mistake from putting into operation in advance soft in opening process, 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 voltage that opens is reached the standard grade and is comprised 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 invention 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 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 after main contactor contact disconnects, can cause the soft resistance heating that opens, in order to reduce the air-cooled or water cooling equipment that device temperature additionally adds, need consume active power.
The present invention 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 subway for example, market) not.Utilizing high accuracy BiMOS(bipolar metal-oxide semiconductor) operational amplifier controls as telemetry circuit.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, with hundred yuan of electronic devices, replaced the high-power consumable electrode type resistance device of thousands of units, improved the operation time limit of equipment.
Re-set target of the present invention 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, except soft, open the meritorious electric power of resistance consumption 10KW, 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 capacitance current leading voltage 900 cause anti-idle, can be doubled fine).
2, soft opening in process, when storage capacitor DC terminal voltage does not reach capping value, no matter the time how long, main contactor also never allow to close a floodgate (to prevent that soft opening from also not exiting while starting, main contactor because DSP sends, allow reclosing command make IGBT produce high-frequency current cause soft recoil of opening circuit is hit).
3,, when 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 resistance not only consumed power but also the serious problem of heating of opening, improve equipment reliability of operation.
Specific embodiment:
As shown in figure mono-to figure seven, the effect of " electronic type APF/SVG soft start " circuit working process and each element is:
Figure mono-is in conjunction with shown in figure tri-, 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 figure mono-is in conjunction with in the soft start rectification circuit as shown in figure tri-:
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 figure mono-block diagram, " IGBT and storage capacitor " is APF/SVG in conjunction with figure tri-: 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 figure mono-block diagram, in " UC terminal voltage testing circuit ", in conjunction with figure tri-: R0, be divider resistance, PT is for detecting the Hall voltage transducer of storage capacitor terminal voltage.
In figure mono-block diagram, " the soft voltage that opens is reached the standard grade " is in conjunction with figure tri-: diode D6 and capacitor C5 form direct voltage isolation and the anti-jamming circuit of 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 figure mono-block diagram " the soft lower voltage limit that opens " in conjunction with figure tri-, with operational amplifier IC3, divider resistance R6 and lower limit are set potentiometer W2 and are formed the soft lower voltage limit that opens and recover 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 figure mono-block diagram " whether soft opening completes drive circuit " in conjunction with figure tri-, with time-base circuit IC5, capacitor C 2 forms the soft circuit switching drive circuit that opens.
Figure mono-block diagram repeat circuit J1 is in conjunction with figure tri-figure tetra-: 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 output " 1 " current potentials, 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, relay J 1 action, and its normally-closed contact J1 disconnects, and CJ1 discharges, its normally opened contact CJ1, CJ3, CJ5 is in normally open, soft having opened.
In figure mono-block diagram, " fault-signal " is the various fault output signals of APF/SVG complete equipment, forms OR-circuit with the soft signal that opens electric current CT1 output, in conjunction with figure tri-D8, is the soft signal rectification diode that opens, and D9 is fault-signal diac.
In figure mono-block diagram " soft electric current and the fault current detection circuit of opening " in conjunction with figure tri-, by operational amplifier IC2, divider resistance R4, sets potentiometer W3, anti-interference capacitor C3, isolating diode D10 forms.
In figure mono-block diagram, " whether allow main circuit combined floodgate drive circuit " in conjunction with figure tri-: by time-base circuit IC7, time delay discharge resistance R5, delay capacitor C4 and capacitor C10 form.
In conjunction with the effect of figure tri-relay J 2 be soft open process in IC7 terminal 3 output " 0 " current potentials, 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 figure bis-block diagrams: load current mutual-inductor " CT2 ", " load current detection ", " whether allowing switching drive circuit " and relay J 3, in conjunction with figure tri-: diode D12 and capacitor C7 form load current rectification and anti-jamming circuit.Operational amplifier IC4, resistance R 7, R8 and potentiometer W4 form the load current testing circuit that allows 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 in load side, there is large load to exit or during lower than minimum running current, 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 figure five block diagrams in conjunction with figure six: J2: be to 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 are closed, and 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 figure tri-, figure tetra-, six pairs of operation logics of the present invention of figure, be 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 action, 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, through D8 rectification, make the in-phase input end of IC2 be placed in " 1 " current potential, 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 and allows 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 when sent switching signal voltage AC220V, and after sound-deadening electricity-saving device diode closes a floodgate, CJ0-2 disconnects, and CJ0-1 is closed, enters APF/SVG compensating coefficient.
Quit a program:
There is phase shortage as equipment complete equipment is in service, during 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, when 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 actions, its normally opened contact J3-1, 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 guarantee the quick input compensation state of APF/SVG, must guarantee that C0 terminal voltage is maintained within a certain range.
The process that C0 terminal voltage maintains:
At APF/SVG, normally exiting Hou， this life circle general circuit is: see figure seven.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, to the in-phase input end current potential of IC3, lower than inverting input, set 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, terminal 2 to IC5, terminal 6 current potentials are during higher than 2/3VCC, IC5 exports " 0 " current potential, relay J 1 action, the soft process that opens finishes.
The above; be only the present invention's embodiment preferably, but protection scope of the present invention is not limited to this, is anyly familiar with in technical scope that those skilled in the art disclose in the present invention; the variation that can expect easily or replacement, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claims.
Claims (10)
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 is connected respectively with the soft lower voltage limit that opens with the soft upper voltage limit that opens, 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, it is characterized in that, from the soft effect of opening electric current of electrical network, be to prevent that APF/SVG main circuit mistake from putting into operation in advance soft in opening process, 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.
3. 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.
4. 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.
5. 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.
6. electronic type APF/SVG soft starting device according to claim 1, is characterized in that, the described soft voltage that opens is reached the standard grade and comprised 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.
7. 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.
8. 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.
9. 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.
10. 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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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104158196A (en) * | 2014-08-22 | 2014-11-19 | 成都迈硕电气有限公司 | SVG-based line voltage compensation method |
| CN104242317A (en) * | 2014-08-22 | 2014-12-24 | 成都迈硕电气有限公司 | SVG switching method for line voltage compensation |
| CN106849123A (en) * | 2017-03-07 | 2017-06-13 | 合肥赛沃能源科技有限公司 | A kind of active filter with self-starting |
| CN107908206A (en) * | 2017-12-28 | 2018-04-13 | 安徽明都电气有限公司 | A kind of temperature control system of high-voltage electrical cabinet |
| CN113437746A (en) * | 2021-06-22 | 2021-09-24 | 北京思源清能电气电子有限公司 | Self-excited start-up control system and method for hybrid active power filter |
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