CN106356985A - Static switching circuit for micro-grid - Google Patents
Static switching circuit for micro-grid Download PDFInfo
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- CN106356985A CN106356985A CN201610799044.4A CN201610799044A CN106356985A CN 106356985 A CN106356985 A CN 106356985A CN 201610799044 A CN201610799044 A CN 201610799044A CN 106356985 A CN106356985 A CN 106356985A
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- 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
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/061—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for DC powered loads
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- 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
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/068—Electronic means for switching from one power supply to another power supply, e.g. to avoid parallel connection
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
- Y02P80/14—District level solutions, i.e. local energy networks
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- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Electronic Switches (AREA)
Abstract
The invention discloses a static switching circuit for a micro-grid. The static switching circuit comprises a control circuit, an isolation drive circuit, an over-current detection circuit, a static switch and a protection circuit, wherein the control circuit is used for receiving grid data and emitting a control instruction for controlling the isolation circuit and the protection circuit; the isolation drive circuit is used for isolating a control signal of the static switch, the isolated signal is used as input of a post-stage push-pull amplification circuit and is output to the static switch; the over-current detection circuit is used for detecting a break-over voltage of the static switch, determining whether the static switch is subjected to over-current and inputting a detection result to the control circuit; the static switch is used for realizing switching between networking operation and grid-connected operation of an inverter of the micro-grid; the protection circuit is used for protecting the static switch to realize reliable operation. The static switching circuit has quite high response speed, can rapidly connect the micro-grid with a power grid and disconnect the micro-grid from the power grid, realizes smooth switching between the networking mode and the grid-connected mode of the micro-grid and has good application prospect.
Description
Technical field
The present invention relates to micro-capacitance sensor technical field is and in particular to a kind of static switch circuit for micro-capacitance sensor.
Background technology
Distributed generation technology is the important directions of future world energy technology development, and it can be according to local resource situation
Select the mode of various energy resources complemental power-generation, be a kind of reliable, economic, green energy resource of cleaning, micro-capacitance sensor not only can solve
The extensive access problem of distributed power source, gives full play to every advantage of distributed power source, also brings other for user many
The benefit of aspect.
At present, micro-capacitance sensor has two kinds of steady state operating mode: is incorporated into the power networks and independent operating.When electrical network, voltage rapid
When the power quality problems such as liter, rapid drawdown, asymmetric, flickering, harmonic wave and instantaneous power failure or scheduled overhaul, micro-capacitance sensor need to turn
Enter independent operation mode.After electric network fault disappears, micro-capacitance sensor need to be connected to the grid again.Therefore, both needed independence in micro-capacitance sensor
Operational mode, needs to be incorporated into the power networks, in order to realize this process, micro-capacitance sensor is indispensable pass with the connecting valve of electrical network again
Button apparatus.
Traditional micro-capacitance sensor and the connecting valve of electrical network, simply mechanical hardware unit (cb, a circuit
Breaker), as relay.But, with the development of semiconductor technology, high speed gate-controlled switch continues to bring out, such as IGCT
(scr, silicon-controlled rectifier), igbt(integrated gate bipolar transistor),
Igct(integrated gate commutated thyristor), and, the switch response speed based on cb technology is slower,
The switching speed of relay is typically between 20ms to 100ms, but circuit design is simple with control, and conducting resistance is low, and price is low
Honest and clean, therefore it is widely adopted in the occasion not being very high to switching speed requirements；Switch response speed based on scr technology is general
In half power frequency period to a power frequency period (electrical network to 50hz is 10ms to 20ms), the product sound that some manufacturers provide
Answer speed can reach a quarter power frequency period, fully meet the requirement of micro-grid system static switch, but right
In needing to connect at a high speed and the occasion disconnecting micro-capacitance sensor and electrical network, just inadaptable, and need to ensure reliability, it is current
Urgent problem.
Content of the invention
The purpose of the present invention is to overcome the connecting valve of existing micro-capacitance sensor and electrical network, and switching speed action response is slower,
The not high problem of reliability.The static switch circuit for micro-capacitance sensor of the present invention, has response speed quickly, can be quick
Micro-capacitance sensor and electrical network be attached and disconnect, that realizes between micro-grid pattern and grid-connect mode both of which smooth cuts
Change, have a good application prospect.
In order to achieve the above object, the technical solution adopted in the present invention is:
A kind of static switch circuit for micro-capacitance sensor it is characterised in that: include control circuit, isolated drive circuit, static state are opened
Pass, over-current detection circuit and protection circuit,
Described control circuit, receives for electric network data, and sends control instruction control isolation circuit, protection circuit；
Described isolated drive circuit, for isolating to static switch control signal, static switch control signal passes through isolation
Afterwards, as the input of rear class push-pull amplifier circuit, and export to static switch；
Described over-current detection circuit, for detecting the conducting voltage of static switch, determines whether static switch occurs overcurrent, and
And testing result is input to control circuit；
Described static switch, is contained within two igbt differential concatenations with fly-wheel diode, realizes microgrid inverter networking fortune
Switching between going and being incorporated into the power networks；
Described protection circuit, for protecting the reliably working of described static switch.
A kind of aforesaid static switch circuit for micro-capacitance sensor it is characterised in that: described isolated drive circuit, including
The one road input of one optocoupler u1, described first optocoupler u1 has been sequentially connected in series resistance r2, resistance r1, outside the end of described resistance r1
The static switch control signal of connection control circuit output, described resistance r2, resistance r1 connection end resistance r6 and the first optocoupler u1's
Another road input is connected, and another road input of described first optocoupler u1 is connected to the ground, and the one of described first optocoupler u1
Road outfan external power supply, the other end outfan of described first optocoupler u1 pass through resistance 4 respectively with switching tube q1, switching tube q2
Base stage be connected, the colelctor electrode external power supply of described switching tube q1, the emitter stage of described switching tube q1 and the collection of switching tube q2
Electrode is connected, the emitter stage external power supply of described switching tube q2, the emitter stage of described switching tube q1 and the current collection of switching tube q2
Pole junction is connected with the gate leve of igbt in static switch by resistance r5, the rear end of described resistance r5 also by resistance r8 with
In static switch, the emitter stage of igbt is connected, and the end of described resistance r8 is parallel with two and carries fly-wheel diode d4, d8 reverse
The flexible switch being composed in series, it is female that the way switch that described flexible switch is constituted in static switch connects three phase network exchange respectively
Line and three-phase microgrid ac bus.
A kind of aforesaid static switch circuit for micro-capacitance sensor it is characterised in that: the other end of described first optocoupler u1
Outfan is provided with pull down resistor r7.
A kind of aforesaid static switch circuit for micro-capacitance sensor it is characterised in that: described static switch, also include switch
Pipe q3, q4, q5, q6, q7, q8, described switching tube q3, q7 are in series, and two ends exchange mother with electrical network ac bus, micro-capacitance sensor respectively
The a phase of line is connected；Described switching tube q4, q6 are in series, the two ends b with electrical network ac bus, micro-capacitance alternating current bus respectively
Mutually it is connected；Described switching tube q5, q8 are in series, and two ends are connected with the c phase of electrical network ac bus, micro-capacitance alternating current bus respectively
Connect, described close pipe q3, q4, q5 be static switch upper brachium pontis；Described q6, q7, q8 are the lower brachium pontis of static switch.
A kind of aforesaid static switch circuit for micro-capacitance sensor it is characterised in that: described protection circuit is provided with upper and lower
Protection circuit, upper and lower protection circuit is connected with the upper and lower brachium pontis of static switch respectively, and described upper protection circuit includes two poles
Pipe d1, d2, d3, d5, d6, d7, the described negative pole of diode d3 is connected with the positive pole of d5, the connection of described diode d3, d5
Place is connected with a phase of micro-capacitance alternating current bus；The described negative pole of diode d1 is connected with the positive pole of d7, described diode
The junction of d1, d7 is connected with the b phase of micro-capacitance alternating current bus；The described negative pole of diode d2 is connected with the positive pole of d6,
The junction of described diode d2, d6 is connected with the c phase of micro-capacitance alternating current bus, the positive pole phase of described diode d1, d2, d3
Connect, the negative pole of described diode d5, d6, d7 is connected, the positive pole of described diode d1, d2, d3 and diode d5, d6, d7
Negative pole between be parallel with the resistance r3 being in series, resistance r4 and the electric capacity c1 being in series, electric capacity c2；Described lower protection circuit bag
Include diode d9, d10, d11, d12, d13, d14, the described negative pole of diode d14 is connected with the positive pole of d10, described two poles
The junction of pipe d14, d10 is connected with a phase of electrical network ac bus；The described negative pole of diode d13 is connected with the positive pole of d9
Connect, the junction of described diode d13, d9 is connected with the b phase of electrical network ac bus；The negative pole of described diode d12 and d11
Positive pole be connected, the junction of described diode d12, d11 is connected with the c phase of electrical network ac bus, described diode
The positive pole of d12, d13, d14 is connected, and the negative pole of described diode d9, d10, d11 is connected, described diode d12, d13,
It is parallel with the resistance r10 being in series, resistance r11 between the negative pole of the positive pole of d14 and diode d9, d10, d11 and be in series
Electric capacity c3, electric capacity c4.
A kind of aforesaid static switch circuit for micro-capacitance sensor it is characterised in that: described over-current detection circuit includes
Two optocoupler u2, a road input of described second optocoupler u2 is connected with resistance r14, diode d15, fly-wheel diode d16 in turn,
Described resistance r14 is connected with the positive pole of diode d15, the negative pole of described diode d15 and the negative pole phase of fly-wheel diode d16
Connect, the positive pole of described fly-wheel diode d16, another road input test side phase with static switch respectively of the second optocoupler u2
Connect, be connected with external power source by resistance r12 between described resistance r14, the positive pole of diode d15, also by resistance r13
It is connected to the ground, described resistance r14 is connected with another road input of the second optocoupler u2 also by electric capacity c14, described second
The outfan of optocoupler u2 is connected with control circuit.
The invention has the beneficial effects as follows: the static switch circuit for micro-capacitance sensor of the present invention, there is response speed quickly
Micro-capacitance sensor and electrical network quickly can be attached and disconnect, realize micro-grid pattern and two kinds of moulds of grid-connect mode by degree
Taking over seamlessly between formula, has a good application prospect.
Brief description
Fig. 1 is the system block diagram of the static switch circuit for micro-capacitance sensor of the present invention.
Fig. 2 is the circuit diagram of the isolated drive circuit of the present invention.
Fig. 3 is the circuit diagram of the static switch of the present invention, on-off circuit.
Fig. 4 is the circuit diagram of the over-current detection circuit of the present invention.
Specific embodiment
Below in conjunction with Figure of description, the present invention is further illustrated.
As shown in figure 1, the static switch circuit for micro-capacitance sensor of the present invention it is characterised in that: include control circuit, every
From drive circuit, static switch, over-current detection circuit and protection circuit,
Described control circuit, receives for electric network data, and sends control instruction control isolation circuit, protection circuit；
Described isolated drive circuit, for isolating to static switch control signal, static switch control signal passes through isolation
Afterwards, as the input of rear class push-pull amplifier circuit, and export to static switch；
Described over-current detection circuit, for detecting the conducting voltage of static switch, determines whether static switch occurs overcurrent, and
And testing result is input to control circuit；
Described static switch, is contained within two igbt differential concatenations with fly-wheel diode, realizes microgrid inverter networking fortune
Switching between going and being incorporated into the power networks；
Described protection circuit, for protecting the reliably working of described static switch.
As shown in Fig. 2 described isolated drive circuit, including the first optocoupler u1, a road input of described first optocoupler u1
It has been sequentially connected in series resistance r2, resistance r1, the static switch control signal of the end external control circuit output of described resistance r1, institute
State resistance r2, resistance r1 connection end resistance r6 is connected with another road input of the first optocoupler u1, described first optocoupler u1's
Another road input is connected to the ground, a road outfan external power supply of described first optocoupler u1, and described first optocoupler u1's is another
One end outfan is connected with the base stage of switching tube q1, switching tube q2 respectively by resistance 4, outside the colelctor electrode of described switching tube q1
Connect power supply, the emitter stage of described switching tube q1 is connected with the colelctor electrode of switching tube q2, and the emitter stage of described switching tube q2 is external
Power supply, resistance r5 and igbt in static switch is passed through in the emitter stage of described switching tube q1 and the colelctor electrode junction of switching tube q2
Gate leve is connected, and the rear end of described resistance r5 is connected with the emitter stage of igbt in static switch also by resistance r8, described electricity
The end of resistance r8 is parallel with two flexible switch with fly-wheel diode d4, d8 differential concatenation composition, and described flexible switch is constituted
A way switch in static switch connects three phase network ac bus and three-phase microgrid ac bus respectively.
The other end outfan of described first optocoupler u1 is provided with pull down resistor r7.
As shown in figure 3, described static switch, also include switching tube q3, q4, q5, q6, q7, q8, described switching tube q3, q7
It is in series, two ends are connected with a phase of electrical network ac bus, micro-capacitance alternating current bus respectively；Described switching tube q4, q6 phase string
Connection, two ends are connected with the b phase of electrical network ac bus, micro-capacitance alternating current bus respectively；Described switching tube q5, q8 are in series, and two
End is connected with the c phase of electrical network ac bus, micro-capacitance alternating current bus respectively, and described pipe q3, q4, q5 of closing is the upper of static switch
Brachium pontis；Described q6, q7, q8 are the lower brachium pontis of static switch.
Described protection circuit is provided with upper and lower protection circuit, the upper and lower protection circuit upper and lower bridge with static switch respectively
Arm is connected, and described upper protection circuit includes diode d1, d2, d3, d5, d6, d7, and the negative pole of described diode d3 is with d5 just
Pole is connected, and the junction of described diode d3, d5 is connected with a phase of micro-capacitance alternating current bus；Described diode d1's is negative
Pole is connected with the positive pole of d7, and the junction of described diode d1, d7 is connected with the b phase of micro-capacitance alternating current bus；Described two
The negative pole of pole pipe d2 is connected with the positive pole of d6, and the junction of described diode d2, d6 is connected with the c phase of micro-capacitance alternating current bus
Connect, the positive pole of described diode d1, d2, d3 is connected, the negative pole of described diode d5, d6, d7 is connected, described diode
It is parallel with the resistance r3 being in series, resistance r4 between the negative pole of the positive pole of d1, d2, d3 and diode d5, d6, d7 and be in series
Electric capacity c1, electric capacity c2；Described lower protection circuit includes diode d9, d10, d11, d12, d13, d14, described diode d14's
Negative pole is connected with the positive pole of d10, and the junction of described diode d14, d10 is connected with a phase of electrical network ac bus；Described
The negative pole of diode d13 is connected with the positive pole of d9, the b phase phase of the junction of described diode d13, d9 and electrical network ac bus
Connect；The described negative pole of diode d12 is connected with the positive pole of d11, and the junction of described diode d12, d11 is exchanged with electrical network
The c phase of bus is connected, and the positive pole of described diode d12, d13, d14 is connected, the negative pole of described diode d9, d10, d11
It is connected, be parallel between the positive pole of described diode d12, d13, d14 and the negative pole of diode d9, d10, d11 and to be in series
Resistance r10, resistance r11 and the electric capacity c3 being in series, electric capacity c4.
As shown in figure 4, described over-current detection circuit includes the second optocoupler u2, the road input of described second optocoupler u2 according to
Secondary be connected with resistance r14, diode d15, fly-wheel diode d16, described resistance r14 is connected with the positive pole of diode d15, institute
The negative pole stating diode d15 is connected with the negative pole of fly-wheel diode d16, the positive pole of described fly-wheel diode d16, the second optocoupler
Another road input of u2 is connected with the test side of static switch respectively, between described resistance r14, the positive pole of diode d15
It is connected with external power source by resistance r12, is connected to the ground also by resistance r13, described resistance r14 is also by electric capacity c14
It is connected with another road input of the second optocoupler u2, the outfan of described second optocoupler u2 is connected with control circuit.
The static switch circuit operation principle for micro-capacitance sensor of the present invention, specific as follows,
The input of the first optocoupler u1 after described control circuit sends control instruction, is entered through resistance r1, resistance r2, so that
The common port obtaining resistance r4 and resistance r7 obtains the control instruction of an isolation, and this instruction is opened through first switch pipe q1 and second
Signal is amplified by the push-pull circuit closing pipe q2 composition, and the signal of this amplification, through resistance r5, is connected to the igbt in static switch
Gate leve, and in the public termination static switch of the 8th resistance r8 and stabilivolt d8 igbt emitter stage, in fig. 2, by two
With fly-wheel diode differential concatenation composition flexible switch composition three phase static switch Zhong mono- tunnel, three phase static switch in this
One tunnel two ends connects three phase network ac bus and three-phase microgrid ac bus respectively, after sending grid-connected instruction, when a phase microgrid
When voltage is higher than a phase line voltage, the 3rd switching tube q3 conducting, form path with the anti-paralleled diode of the 7th switching tube q7；
When a phase microgrid voltage is less than a phase line voltage, the 7th switching tube q7 conducting, the anti-paralleled diode with the 3rd switching tube q3
Form path, then like this, just there is not the single-phase conducting of igbt, other biphase operation principles are similar.But due to
The breaker acting speed of igbt is fast, then, when switching tube turns off, due to the presence of stray inductance and line inductance, easily cause relatively
Big peak voltage, damages switching device, therefore needs plus upper and lower protection circuit, as shown in Fig. 2 in microgrid three-phase bus and electricity
In net bus, connect three-phase uncontrollable rectifier bridge respectively, and the output-parallel resistance in rectifier bridge and electric capacity, form charging circuit
To charge for clamping capacitance, thus the voltage of AC is limited in safety range, be connected in parallel on the resistance at electric capacity two ends for
Release energy on electric capacity.
In over-current detection circuit, when igbt normal work, resistance r12 and the public terminal voltage of resistance r13 are by diode
D15, fly-wheel diode d16 institute clamper, the second optocoupler u2 can not turn on, then err_1 is in high level, is that circuit is normal；When
During igbt excessively stream, the voltage between c1, e1 terminal raises, and leads to diode d15, fly-wheel diode d16 to end, r12 and r13 is public
Terminal voltage raises altogether, the second optocoupler u2 conducting, then err_1 voltage is low level, sends fault-signal and is input to control circuit, then
Control circuit sends shutoff instruction, and switchgear quits work.The static switch of the micro-capacitance sensor of present invention design, has faster
Turn-off speed, and there are higher reliability and stability.
In sum, the static switch circuit for micro-capacitance sensor of the present invention, has response speed quickly, can be quick
Micro-capacitance sensor and electrical network be attached and disconnect, that realizes between micro-grid pattern and grid-connect mode both of which smooth cuts
Change, have a good application prospect.
Ultimate principle, principal character and the advantage of the present invention have been shown and described above.The technical staff of the industry should
Understand, the present invention is not restricted to the described embodiments, the simply explanation present invention's described in above-described embodiment and description is former
Reason, without departing from the spirit and scope of the present invention, the present invention also has various changes and modifications, these changes and improvements
Both fall within scope of the claimed invention.Claimed scope is by appending claims and its equivalent circle.
Fixed.
Claims (6)
1. a kind of static switch circuit for micro-capacitance sensor it is characterised in that: include control circuit, isolated drive circuit, static state
Switch, over-current detection circuit and protection circuit,
Described control circuit, receives for electric network data, and sends control instruction control isolation circuit, protection circuit；
Described isolated drive circuit, for isolating to static switch control signal, static switch control signal passes through isolation
Afterwards, as the input of rear class push-pull amplifier circuit, and export to static switch；
Described over-current detection circuit, for detecting the conducting voltage of static switch, determines whether static switch occurs overcurrent, and
And testing result is input to control circuit；
Described static switch, is contained within two igbt differential concatenations with fly-wheel diode, realizes microgrid inverter networking fortune
Switching between going and being incorporated into the power networks；
Described protection circuit, for protecting the reliably working of described static switch.
2. a kind of static switch circuit for micro-capacitance sensor according to claim 1 it is characterised in that: described isolation drive
Circuit, including the first optocoupler u1, a road input of described first optocoupler u1 has been sequentially connected in series resistance r2, resistance r1, described electricity
The static switch control signal of the end external control circuit output of resistance r1, described resistance r2, resistance r1 connection end resistance r6 with
Another road input of the first optocoupler u1 is connected, and another road input of described first optocoupler u1 is connected to the ground, and described
No. one outfan external power supply of one optocoupler u1, the other end outfan of described first optocoupler u1 pass through resistance 4 respectively with switch
Pipe q1, the base stage of switching tube q2 are connected, the colelctor electrode external power supply of described switching tube q1, the emitter stage of described switching tube q1 with
The colelctor electrode of switching tube q2 is connected, the emitter stage external power supply of described switching tube q2, the emitter stage of described switching tube q1 with open
The colelctor electrode junction closing pipe q2 is connected with the gate leve of igbt in static switch by resistance r5, and the rear end of described resistance r5 is also
It is connected with the emitter stage of igbt in static switch by resistance r8, the end of described resistance r8 is parallel with two band afterflow two poles
The flexible switch of pipe d4, d8 differential concatenation composition, the way switch that described flexible switch is constituted in static switch connects three respectively
Phase electrical network ac bus and three-phase microgrid ac bus.
3. a kind of static switch circuit for micro-capacitance sensor according to claim 2 it is characterised in that: described first optocoupler
The other end outfan of u1 is provided with pull down resistor r7.
4. a kind of static switch circuit for micro-capacitance sensor according to claim 1 it is characterised in that: described static state is opened
Close, also include switching tube q3, q4, q5, q6, q7, q8, described switching tube q3, q7 are in series, two ends exchange mother respectively with electrical network
Line, a phase of micro-capacitance alternating current bus are connected；Described switching tube q4, q6 are in series, two ends respectively with electrical network ac bus, micro-
The b phase of electrical network ac bus is connected；Described switching tube q5, q8 are in series, and two ends are handed over electrical network ac bus, micro-capacitance sensor respectively
Stream bus c phase be connected, described close pipe q3, q4, q5 be static switch upper brachium pontis；Described q6, q7, q8 are static switch
Lower brachium pontis.
5. a kind of static switch circuit for micro-capacitance sensor according to claim 1 it is characterised in that: described protection circuit
It is provided with upper and lower protection circuit, upper and lower protection circuit is connected with the upper and lower brachium pontis of static switch respectively, described upper protection electricity
Road includes diode d1, d2, d3, d5, d6, d7, and the described negative pole of diode d3 is connected with the positive pole of d5, described diode
The junction of d3, d5 is connected with a phase of micro-capacitance alternating current bus；The described negative pole of diode d1 is connected with the positive pole of d7,
The junction of described diode d1, d7 is connected with the b phase of micro-capacitance alternating current bus；The negative pole of described diode d2 is with d6 just
Pole is connected, and the junction of described diode d2, d6 is connected with the c phase of micro-capacitance alternating current bus, described diode d1, d2,
The positive pole of d3 is connected, and the negative pole of described diode d5, d6, d7 is connected, the positive pole of described diode d1, d2, d3 and two poles
It is parallel with the resistance r3 being in series, resistance r4 and the electric capacity c1 being in series, electric capacity c2 between the negative pole of pipe d5, d6, d7；Under described
Protection circuit includes diode d9, d10, d11, d12, d13, d14, and the described negative pole of diode d14 is connected with the positive pole of d10
Connect, the junction of described diode d14, d10 is connected with a phase of electrical network ac bus；The negative pole of described diode d13 and d9
Positive pole be connected, the junction of described diode d13, d9 is connected with the b phase of electrical network ac bus；Described diode d12
Negative pole be connected with the positive pole of d11, the junction of described diode d12, d11 is connected with the c phase of electrical network ac bus, institute
The positive pole stating diode d12, d13, d14 is connected, and the negative pole of described diode d9, d10, d11 is connected, described diode
Be parallel between the negative pole of the positive pole of d12, d13, d14 and diode d9, d10, d11 the resistance r10 being in series, resistance r11 and
Electric capacity c3, the electric capacity c4 being in series.
6. a kind of static switch circuit for micro-capacitance sensor according to claim 1 it is characterised in that: described over-current detection
Circuit includes the second optocoupler u2, and a road input of described second optocoupler u2 is connected with resistance r14, diode d15, afterflow in turn
Diode d16, described resistance r14 is connected with the positive pole of diode d15, the negative pole of described diode d15 and fly-wheel diode
The negative pole of d16 is connected, and the positive pole of described fly-wheel diode d16, another road input of the second optocoupler u2 are opened with static state respectively
The test side closed is connected, and is connected with external power source by resistance r12 between described resistance r14, the positive pole of diode d15,
It is connected to the ground also by resistance r13, described resistance r14 is also by another road input phase of electric capacity c14 and the second optocoupler u2
Connect, the outfan of described second optocoupler u2 is connected with control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610799044.4A CN106356985A (en) | 2016-08-31 | 2016-08-31 | Static switching circuit for micro-grid |
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| CN201610799044.4A CN106356985A (en) | 2016-08-31 | 2016-08-31 | Static switching circuit for micro-grid |
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| CN107517004A (en) * | 2017-08-29 | 2017-12-26 | 南京航空航天大学 | A kind of IGBT series connection opening process method for equalizing voltage |
| CN109873552A (en) * | 2019-04-25 | 2019-06-11 | 北京大学邯郸创新研究院 | A kind of main circuit of converter and frequency converter based on IGBT pipe |
| CN114914930A (en) * | 2022-04-24 | 2022-08-16 | 深圳市永联科技股份有限公司 | Device and method for switching between on-line network and off-line network |
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| CN105429167A (en) * | 2015-11-05 | 2016-03-23 | 北京科诺伟业科技股份有限公司 | Flexible grid-connected and off-grid switching device for micro-grid |
| US20160126827A1 (en) * | 2013-05-15 | 2016-05-05 | Nr Engineering Co., Ltd. | Sub-module, protection unit, converter, and control method thereof |
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| CN101350613A (en) * | 2007-07-17 | 2009-01-21 | 中兴通讯股份有限公司 | Electronic switch |
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| CN109873552A (en) * | 2019-04-25 | 2019-06-11 | 北京大学邯郸创新研究院 | A kind of main circuit of converter and frequency converter based on IGBT pipe |
| CN114914930A (en) * | 2022-04-24 | 2022-08-16 | 深圳市永联科技股份有限公司 | Device and method for switching between on-line network and off-line network |
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