CN106786576A - A kind of active filter dc bus discharge circuit - Google Patents
A kind of active filter dc bus discharge circuit Download PDFInfo
- Publication number
- CN106786576A CN106786576A CN201611025115.1A CN201611025115A CN106786576A CN 106786576 A CN106786576 A CN 106786576A CN 201611025115 A CN201611025115 A CN 201611025115A CN 106786576 A CN106786576 A CN 106786576A
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- Prior art keywords
- bus
- circuit
- discharge
- power
- voltage
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Classifications
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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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/01—Arrangements for reducing harmonics or ripples
-
- 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
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
- H02J1/02—Arrangements for reducing harmonics or ripples
-
- 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
- Y02E40/40—Arrangements for reducing harmonics
Abstract
The present invention discloses a kind of active filter dc bus discharge circuit, the present invention relates to active filter circuit technical field, prior art directly increases discharge resistance power and can there is equipment power dissipation and dramatically increases, and cannot adaptively be rapidly completed the technical problems such as energy storage component electric discharge.The invention mainly comprises discharge power on-off circuit, with power discharge resistant series, the shunt circuit of dc bus on active filter is collectively formed；Self-adaptive switch circuit, by the magnitude of voltage gated discharge power switch circuit of dc bus.The present invention is used for high-voltage large-capacity power quality controlling.
Description
Technical field
The present invention relates to active filter circuit technical field, and in particular to a kind of active filter dc bus electric discharge electricity
Road.
Background technology
In power network, APF active filters extremely Related product power quality controlling is more and more paid attention to and is answered
With.Power quality controlling just necessarily energy buffer device is carried out to power network, therefore APF active filters need HVDC
Bus buffering accumulated energy, typically using big electrochemical capacitor, capacitance voltage is about 780V direct currents.For the maintainability to equipment,
Generally with several hundreds of kilohms of power resistor and to being discharged on dc bus, while this discharge resistance power is not
Can be too big, otherwise machine normal work when have very big energy ezpenditure.Such result is that machine needs to wait 2-3 after power failure
Individual hour, its dc bus can just be put into personal safety voltage, and this causes to debug equipment, has safeguarded very big difficulty, together
When be also a major hidden danger to personal safety.
The content of the invention
It is existing present invention aim at a kind of active filter dc bus discharge circuit is provided for above-mentioned prior art
There is technology directly to increase discharge resistance power and can there is equipment power dissipation to dramatically increase, and cannot adaptively be rapidly completed energy storage
The technical problems such as part electric discharge.
To reach above-mentioned purpose, the technical solution adopted by the present invention is as follows：
A kind of active filter dc bus discharge circuit, including
Discharge power on-off circuit, and power discharge resistant series, collectively form dc bus on active filter and
Connection loop；
Self-adaptive switch circuit, by the magnitude of voltage gated discharge power switch circuit of dc bus.Power discharge resistance is selected
With high-power resistance, its power is about 100 watts.
In such scheme, also including auxiliary power circuit, a gating signal is exported to adaptive by the magnitude of voltage of dc bus
Inductive switch circuit, self-adaptive switch circuit controls discharge power on-off circuit on or off by the gating signal.
In such scheme, described self-adaptive switch circuit, including
Electric capacity, is charged by gating signal；
First voltage-regulator diode, its negative electrode connects the anode of electric capacity；
Switch triode, its on or off, and its colelctor electrode and hair are controlled by the anode voltage of the first voltage-regulator diode
Emitter-base bandgap grading is connected respectively to the control gate pole and emitter stage of discharge power switch.
In such scheme, described discharge power on-off circuit, including
Discharge power is switched, its colelctor electrode connection power discharge resistance；
Second voltage-regulator diode, the grid and anode of its negative electrode connection discharge power switch and the transmitting of discharge power switch
Pole is connected to same potential point.
The electric capacity is charged by lasting gating signal and causes the second voltage-regulator diode reverse breakdown, the second voltage-regulator diode
Reverse output voltage causes switch triode to turn on, the collector and emitter short circuit discharge power on-off circuit of switch triode,
So as to discharge power on-off circuit closes electric discharge；After gating signal stops, when the positive terminal voltage of the electric capacity is less than the second voltage stabilizing two
During pole pipe breakdown reverse voltage, the second voltage-regulator diode reversely ends, and switch triode ends therewith, causes short circuit failure, so that
Discharge power on-off circuit is discharged.
In such scheme, described auxiliary power circuit, including inverse-excitation type switch power-supply.
A kind of active filter dc bus charging method, comprises the following steps,
Step 1, an on-off circuit is set in the power discharge loop of dc bus on the active filter；
Step 2, being turned on or off according to the magnitude of voltage controlling switch circuit of dc bus, and be turned on or off by this
Dc bus is discharged or is stopped discharging in on-off circuit, control power discharge loop.
In the above method, described step 1 comprises the following steps,
Step 1.1, by the power discharge resistant series in on-off circuit and power discharge loop；
Step 1.2, the on-off circuit of series connection and power discharge resistance be connected in parallel to dc bus together again.
In the above method, described step 2 comprises the following steps,
Step 2.1, one self-adaptive switch circuit of setting are controlled by the voltage of dc bus；
Step 2.2, the magnitude of voltage according to dc bus, on-off is led by self-adaptive switch circuit controling switch circuit
Open；
Dc bus is discharged or stopped in step 2.3, the on-off circuit by being turned on or off, control power discharge loop
Only discharge.
In the above method, described step 2.1 receives the voltage of dc bus and by its output by auxiliary power circuit
Gating signal is to self-adaptive switch circuit.
In the above method, described step 2.2, according to gating signal, by self-adaptive switch circuit controling switch circuit
Be turned on or off.
Compared with prior art, beneficial effects of the present invention：
1st, in the case where not influenceing normally to run power consumption, the repid discharge after shut down of APF dc bus is realized；
2nd, the present invention 1 minute or so is to be capable of achieving high voltage dc bus to be discharged to below 36V shutting down, and is significantly reduced straight
Stream threat of the bus to personal safety, prior art generally requires 2-3 hour can just discharge into personal safety voltage；
3rd, circuit of the present invention is simple and works well, particularly suitable active filter harmonic compensation equipment, greatly facilitates
Debugging to equipment, safeguard.
Brief description of the drawings
Fig. 1 circuit theory diagrams when self adaptation forbids electric discharge for the present invention；
Fig. 2 circuit theory diagrams in self adaptation electric discharge work for the present invention.
Specific embodiment
All features disclosed in this specification, or disclosed all methods or during the step of, except mutually exclusive
Feature and/or step beyond, can combine by any way.
The present invention will be further described below in conjunction with the accompanying drawings：
Embodiment 1
Circuit of the present invention is related to five parts, referring to accompanying drawing 1,2 above.Part I is female 780V high-voltage energy storages direct current
Line, including electrochemical capacitor C1, C2..C28；Part II is the accessory power supply part for being connected to high voltage dc bus side, including direct current
High voltage interface and low-tension supply output interface；Part III is self adaptation state-detection and drive circuit, bag triode Q2, two poles
Pipe D1, voltage-stabiliser tube Z2, resistance R2, R3, R4, R5 and electric capacity C29；Part IV be discharge power switch, including power tube Q1 and
Gate protection pipe Z1；Part V is power power discharge resistance.
In machine normal power-up, DC bus-bar voltage Vbus maintains 780VDC, accessory power supply energy normal work, auxiliary
The diode D1 that wherein leads up to of power supply output charges generation voltage V1, V1 voltage to electric capacity C29, resistance R4 higher than voltage-stabiliser tube
Z2 conducting voltages, and turn on Q2 by current-limiting resistance R3, Q2 colelctor electrodes move the grid voltage of discharge power switch Q1 to 0,
So discharge power switch Q1 is turned off, power discharge resistance is stopped, does not consume power, refers to Fig. 1.
When machine is powered off, DC bus-bar voltage Vbus without energy charge source, accessory power supply can only be first passed through put
Electricity, DC bus-bar voltage Vbus begins to decline, and when DC bus-bar voltage Vbus discharges into below 500VDC, accessory power supply stops
Work, now diode D1 electric capacity C29, resistance R4 charging currents are disappeared, V1 voltages also rapid decrease and to 0, voltage stabilizing quickly
Pipe Z2 is closed, and the base current of triode Q2 disappears, then triode Q2 shut-offs, and the anode of dc bus passes through resistance R2 and grid
Pole protection pipe voltage stabilizing Z1 moves the grid voltage of discharge power switch Q1 to 12V, so power switch Q1 is turned on, power discharge electricity
Resistance is started working, and DC bus-bar voltage is put within the short time (60 seconds) below the safe voltage scope 36V of the person, is referred to
Fig. 2.
The above, specific embodiment only of the invention, but protection scope of the present invention is not limited thereto, and it is any
Belong to those skilled in the art the invention discloses technical scope in, the change or replacement that can be readily occurred in, all should
It is included within the scope of the present invention.
Claims (9)
1. a kind of active filter dc bus discharge circuit, it is characterised in that including
Discharge power on-off circuit, with power discharge resistant series, the parallel connection for collectively forming dc bus on active filter is returned
Road；
Self-adaptive switch circuit, by the magnitude of voltage gated discharge power switch circuit of dc bus.
2. a kind of active filter dc bus discharge circuit according to claim 1, it is characterised in that also including auxiliary
Power circuit, a gating signal is exported to self-adaptive switch circuit by the magnitude of voltage of dc bus, and self-adaptive switch circuit is by this
Gating signal controls discharge power on-off circuit on or off.
3. a kind of active filter dc bus discharge circuit according to claim 2, it is characterised in that described is adaptive
Inductive switch circuit, including
Electric capacity, is charged by gating signal；
First voltage-regulator diode, its negative electrode connects the anode of electric capacity；
Switch triode, its on or off, and its collector and emitter are controlled by the anode voltage of the first voltage-regulator diode
It is connected respectively to the control gate pole and emitter stage of discharge power switch.
4. a kind of active filter dc bus discharge circuit according to claim 1 or 3, it is characterised in that described
Discharge power on-off circuit, including
Discharge power is switched, its colelctor electrode connection power discharge resistance；
Second voltage-regulator diode, its negative electrode connects the grid of discharge power switch and anode is equal with the emitter stage that discharge power is switched
It is connected to same potential point.
5. a kind of active filter dc bus charging method, it is characterised in that comprise the following steps,
Step 1, an on-off circuit is set in the power discharge loop of dc bus on the active filter；
Step 2, being turned on or off according to the magnitude of voltage controlling switch circuit of dc bus, and the switch being turned on or off by this
Dc bus is discharged or is stopped discharging in circuit, control power discharge loop.
6. a kind of active filter dc bus charging method according to claim 5, it is characterised in that described step
1, comprise the following steps,
Step 1.1, by the power discharge resistant series in on-off circuit and power discharge loop；
Step 1.2, the on-off circuit of series connection and power discharge resistance be connected in parallel to dc bus together again.
7. a kind of active filter dc bus charging method according to claim 5 or 6, it is characterised in that described
Step 2, comprises the following steps,
Step 2.1, one self-adaptive switch circuit of setting are controlled by the voltage of dc bus；
Step 2.2, the magnitude of voltage according to dc bus, by being turned on or off for self-adaptive switch circuit controling switch circuit；
Dc bus is discharged or is stopped putting in step 2.3, the on-off circuit by being turned on or off, control power discharge loop
Electricity.
8. a kind of active filter dc bus charging method according to claim 7, it is characterised in that described step
2.1, the voltage of dc bus is received and by its output gating signal to self-adaptive switch circuit by auxiliary power circuit.
9. a kind of active filter dc bus charging method according to claim 8, it is characterised in that described step
2.2, according to gating signal, by being turned on or off for self-adaptive switch circuit controling switch circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611025115.1A CN106786576A (en) | 2016-11-22 | 2016-11-22 | A kind of active filter dc bus discharge circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611025115.1A CN106786576A (en) | 2016-11-22 | 2016-11-22 | A kind of active filter dc bus discharge circuit |
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| Publication Number | Publication Date |
|---|---|
| CN106786576A true CN106786576A (en) | 2017-05-31 |
Family
ID=58969106
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611025115.1A Pending CN106786576A (en) | 2016-11-22 | 2016-11-22 | A kind of active filter dc bus discharge circuit |
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| CN (1) | CN106786576A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111614258A (en) * | 2020-06-16 | 2020-09-01 | 任守华 | High-voltage generator based on MOS tube series discharge |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101051751A (en) * | 2007-05-14 | 2007-10-10 | 上海艾帕电力电子有限公司 | Active power filter including power unit and its control method |
| CN102437586A (en) * | 2011-12-29 | 2012-05-02 | 欣达重工股份有限公司 | Energy storage and unloading device of wind power generation system and control method thereof |
| CN205622497U (en) * | 2016-04-25 | 2016-10-05 | 深圳索瑞德电子有限公司 | Electric -power active filter's direct current protection circuit |
-
2016
- 2016-11-22 CN CN201611025115.1A patent/CN106786576A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101051751A (en) * | 2007-05-14 | 2007-10-10 | 上海艾帕电力电子有限公司 | Active power filter including power unit and its control method |
| CN102437586A (en) * | 2011-12-29 | 2012-05-02 | 欣达重工股份有限公司 | Energy storage and unloading device of wind power generation system and control method thereof |
| CN205622497U (en) * | 2016-04-25 | 2016-10-05 | 深圳索瑞德电子有限公司 | Electric -power active filter's direct current protection circuit |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111614258A (en) * | 2020-06-16 | 2020-09-01 | 任守华 | High-voltage generator based on MOS tube series discharge |
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Application publication date: 20170531 |
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| RJ01 | Rejection of invention patent application after publication |