CN104993486B - Active Power Filter-APF - Google Patents
Active Power Filter-APF Download PDFInfo
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- CN104993486B CN104993486B CN201510395884.XA CN201510395884A CN104993486B CN 104993486 B CN104993486 B CN 104993486B CN 201510395884 A CN201510395884 A CN 201510395884A CN 104993486 B CN104993486 B CN 104993486B
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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]
Abstract
The invention discloses a kind of Active Power Filter-APF, including：Rectification energy-storage module, is connected with power network, obtains direct current for carrying out rectification to the alternating current from the power network, and store electric energy；Switching Power Supply, is connected with the rectification energy-storage module, for carrying out transformation to the direct current from the rectification energy-storage module, to obtain control voltage；Control module, is connected with the Switching Power Supply, in the case of supplying the control voltage in the Switching Power Supply, sends drive signal；And harmonic elimination module, it is connected with the control module, for eliminating signal to the power network output harmonic wave according to the drive signal.According to the Active Power Filter-APF of the present invention in the case of outside abnormal electrical power supply, it still is able to judge soundly and handles, do not result in the out of control of Active Power Filter-APF, can effectively protect the miscellaneous equipment on Active Power Filter-APF and power network without damage.
Description
Technical field
The present invention relates to field of power electronics, more particularly to a kind of Active Power Filter-APF.
Background technology
With developing rapidly and extensive use for Power Electronic Technique, electric energy has obtained more fully utilizing.However, example
Such as fairing, frequency converter, the non-linear power electronic equipment of computer cause the voltage and current of power network to be distorted, production
Raw electric energy harmonic wave.Also, the increasingly increase of the increase and its capacity with non-linear equipment quantity so that Harmonious Waves in Power Systems
Pollution problem is increasingly extensive, has had a strong impact on the quality of electric energy, and the safety, economical operation to power system cause great shadow
Ring.
In order to improve the quality of electric energy, improve the quality of power distribution network, conventional method is to use harmonic suppression apparatus for example
Active Power Filter-APF (English：Active power filter, abbreviation：APF signal) is eliminated to power network output harmonic wave, to press down
System or the harmonic wave for eliminating power network.Active Power Filter-APF, which has, can filter out multiple and higher hamonic wave simultaneously and will not cause resonance
Deng many advantages, but the requirement to control logic is very rigorous, therefore the reliability of the power supply to being controlled for filtering system will
Ask very high.
Because Active Power Filter-APF is powered by power network, powered off suddenly if there is power network, maloperation or its
Situations such as its load faulty, cause Active Power Filter-APF to be disconnected with power network, may cause Active Power Filter-APF can not
Continuation is controlled, or even the hash to power network output in short-term, may cause self to damage and other users in power network
Device damage.
The content of the invention
Technical problem
In view of this, the technical problem to be solved in the present invention is, how Active Power Filter-APF externally fed it is abnormal
In the case of, prevent the abnormal work of Active Power Filter-APF.
Solution
According to an aspect of the invention, there is provided a kind of Active Power Filter-APF, including：Rectification energy-storage module, with electricity
Net connection, obtains direct current, and store electric energy for carrying out rectification to the alternating current from the power network；Switching Power Supply, with institute
The connection of rectification energy-storage module is stated, for carrying out transformation to the direct current from the rectification energy-storage module, to obtain control voltage；
Control module, is connected with the Switching Power Supply, in the case of supplying the control voltage in the Switching Power Supply, sends drive
Dynamic signal；And harmonic elimination module, be connected with the control module, for according to the drive signal to the power network output harmonic wave
Eliminate signal.
For above-mentioned Active Power Filter-APF, in a kind of possible implementation, the rectification energy-storage module includes：The
One inductance, the second inductance, the first rectifying circuit, the second rectifying circuit and accumulator, wherein, one end of first inductance with
The power network connection, the other end of first inductance is connected with first rectifying circuit；One end of second inductance with
The power network connection, the other end of second inductance is connected with second rectifying circuit；It is first rectifying circuit, described
Second rectifying circuit and the accumulator are in parallel.
For above-mentioned Active Power Filter-APF, in a kind of possible implementation, the rectification energy-storage module also includes
3rd inductance and the 3rd rectifying circuit, wherein, one end of the 3rd inductance is connected with the power network, the 3rd inductance it is another
One end is connected with the 3rd rectifying circuit, the 3rd rectifying circuit and first rectifying circuit, second rectified line
Road and the accumulator are in parallel.
For above-mentioned Active Power Filter-APF, in a kind of possible implementation, first rectifying circuit includes string
The first rectifying tube and the second rectifying tube of connection, the other end of first inductance and first rectifying tube and second rectification
The series connection end connection of pipe；Second rectifying circuit includes the 3rd rectifying tube and the 4th rectifying tube of series connection, second inductance
The other end be connected with the series connection end of the 3rd rectifying tube and the 4th rectifying tube.
For above-mentioned Active Power Filter-APF, in a kind of possible implementation, the 3rd rectifying circuit includes string
The 5th rectifying tube and the 6th rectifying tube of connection, the other end and the 5th rectifying tube and the 6th rectification of the 3rd inductance
The series connection end connection of pipe.
For above-mentioned Active Power Filter-APF, in a kind of possible implementation, the accumulator includes series connection
First accumulator and the second accumulator, one end of first accumulator are connected with the Switching Power Supply, and described second
One end of accumulator is connected with the Switching Power Supply, the other end of first accumulator and second accumulator
The other end is connected and is grounded；First accumulator includes the first electric capacity and 3rd resistor of parallel connection, the second energy storage electricity
Road includes the second electric capacity and the 4th resistance in parallel.
For above-mentioned Active Power Filter-APF, in a kind of possible implementation, first inductance passes through the first electricity
Resistance is connected with the power network, and the two ends of the first resistor are connected with first switch, second inductance by second resistance and
The power network connection, the two ends of the second resistance are connected with second switch.
For above-mentioned Active Power Filter-APF, in a kind of possible implementation, the Switching Power Supply is opened including one-level
Powered-down source and secondary switch power supply, the input of the one-level Switching Power Supply are connected with the rectification energy-storage module, the one-level
The output end of Switching Power Supply is connected with the input of the secondary switch power supply.
For above-mentioned Active Power Filter-APF, in a kind of possible implementation, the control module includes processor
And driving part, the processor is connected with the driving part, and the processor and the driving part are respectively with described two
The output end connection of level Switching Power Supply, the driving part is connected with the harmonic elimination module；The secondary switch power supply respectively to
The processor and the driving part supply the first control voltage and the second control voltage, and the processor is opened at described two grades
In the case that powered-down source supplies first control voltage, control insulated gate of the driving part into the harmonic elimination module double
Polar transistor IGBT control end applies second control voltage, to cause the harmonic elimination module to export humorous to the power network
Ripple eliminates signal.
For above-mentioned Active Power Filter-APF, in a kind of possible implementation, the control module also includes and institute
State sensor and man-machine communication's circuit that processor and the secondary switch power supply are respectively connected, the secondary switch power supply point
The 3rd control voltage and the 4th control voltage are not supplied to the sensor and man-machine communication's circuit, the sensor is in institute
In the case of stating secondary switch power supply supply the 3rd control voltage, the harmonic wave in the power network, the processor root are detected
The harmonic wave measured according to the sensor determines second control voltage, and the active electric power is judged as in the processor
In the case of the externally fed exception of wave filter, the electric energy stored using the rectification energy-storage module is continued to the control mould
Block supplies the control voltage, to cause the harmonic elimination module smoothly out of service, and is sent out by man-machine communication's circuit
Go out the alarm signal of the externally fed exception for representing the Active Power Filter-APF.
Beneficial effect
Active Power Filter-APF according to embodiments of the present invention, which has, can store the rectification energy-storage module of electric energy, because each
Kind of reason causes Active Power Filter-APF and the power network to disconnect and make it that the externally fed of the Active Power Filter-APF is abnormal
In the case of, it still is able to judge soundly and handle for Active Power Filter-APF, does not result in Active Power Filter-APF
It is out of control, so as to effectively protect the miscellaneous equipment on Active Power Filter-APF and power network without damage.
According to below with reference to the accompanying drawings becoming to detailed description of illustrative embodiments, further feature of the invention and aspect
It is clear.
Brief description of the drawings
Comprising in the description and constituting accompanying drawing and the specification of a part of specification and together illustrate the present invention's
Exemplary embodiment, feature and aspect, and for explaining the principle of the present invention.
Fig. 1 shows the structural representation of Active Power Filter-APF according to an embodiment of the invention；
Fig. 2 shows the structural representation of the rectification energy-storage module of Active Power Filter-APF according to an embodiment of the invention；
Fig. 3 shows the structural representation of the rectification energy-storage module of Active Power Filter-APF according to another embodiment of the present invention
Figure；
Fig. 4 shows the circuit diagram of the rectification energy-storage module of Active Power Filter-APF according to an embodiment of the invention；
Fig. 5 shows the structural representation of Active Power Filter-APF according to another embodiment of the present invention；
Fig. 6 shows the electricity of the one-level Switching Power Supply of the Switching Power Supply of Active Power Filter-APF according to an embodiment of the invention
Road schematic diagram；
Fig. 7 shows the structural representation of the Active Power Filter-APF of comparative example；
Fig. 8 shows the structural representation of the control power supply of Active Power Filter-APF shown in Fig. 7；
Fig. 9 shows that the Active Power Filter-APF of another comparative example accesses the schematic diagram of power network.
Embodiment
Describe various exemplary embodiments, feature and the aspect of the present invention in detail below with reference to accompanying drawing.It is identical in accompanying drawing
Reference represent the same or analogous element of function.Although the various aspects of embodiment are shown in the drawings, remove
Non-specifically is pointed out, it is not necessary to accompanying drawing drawn to scale.
Special word " exemplary " is meant " being used as example, embodiment or illustrative " herein.Here as " exemplary "
Illustrated any embodiment should not necessarily be construed as preferred or advantageous over other embodiments.
In addition, in order to better illustrate the present invention, numerous details are given in embodiment below.
It will be appreciated by those skilled in the art that without some details, the present invention can equally be implemented.In some instances, for
Method well known to those skilled in the art, means, element and circuit are not described in detail, in order to highlight the purport of the present invention.
Fig. 1 shows the structural representation of Active Power Filter-APF according to an embodiment of the invention.As shown in figure 1, described
Active Power Filter-APF mainly includes rectification energy-storage module 110, Switching Power Supply 120, control module 130 and harmonic elimination module 140, its
In, rectification energy-storage module 110 is connected with power network, and direct current is obtained for carrying out rectification to the alternating current from the power network, and
Store electric energy；Switching Power Supply 120 is connected with rectification energy-storage module 110, for entering to the direct current for carrying out self-rectifying energy-storage module 110
Row transformation, to obtain control voltage；Control module 130 is connected with Switching Power Supply 120, described for being supplied in Switching Power Supply 120
In the case of control voltage, drive signal is sent；Harmonic elimination module 140 (can be Fig. 7 institutes in a kind of possible implementation
The primary circuit shown) it is connected with control module 130, believe for being eliminated according to the drive signal to the power network output harmonic wave
Number.
The rectification energy-storage module of electric energy can be stored because Active Power Filter-APF of the present invention has, therefore,
Power off suddenly because of power network, Active Power Filter-APF and electricity caused by other load faulties etc. in the maloperation of Field Force or power network
Net disconnect and cause the Active Power Filter-APF externally fed exception in the case of, control module still is able to utilize rectification
The electric energy that energy-storage module is stored works on, so as to take corresponding safeguard measure, for example stop driving harmonic elimination module
To stop output of the Active Power Filter-APF to power network.So, by causing Active Power Filter-APF disconnecting company with power network
Will not be out of control in the case of connecing, effectively protect the miscellaneous equipment on Active Power Filter-APF and power network without damage.
In a kind of possible implementation, as shown in Fig. 2 Active Power Filter-APF according to an embodiment of the invention
Rectification energy-storage module 110 can include：First inductance L1, the second inductance L2, the first rectifying circuit 111, the second rectifying circuit 112
With accumulator 113, wherein, the first inductance L1One end (A ends) be connected with power network, the first inductance L1The other end and first whole
Flow Line 111 is connected；Second inductance L2One end (C-terminal) be connected with power network, the second inductance L2The other end and the second rectifying circuit
112 connections；First rectifying circuit 111, the second rectifying circuit 112 and accumulator 113 are in parallel.In the implementation, rectification
Energy-storage module 110 can be connected via two ends of A, C with power network, it is adaptable to two-phase power network, can be by the He of the first rectifying circuit 111
Second rectifying circuit 112 collectively single phase rectifier circuit.
In a kind of possible implementation, as shown in figure 3, Active Power Filter-APF according to an embodiment of the invention
Rectification energy-storage module 110 can also include the 3rd inductance L3With the 3rd rectifying circuit 114, wherein, the 3rd inductance L3One end
(B ends) is connected with power network, the 3rd inductance L3The other end be connected with the 3rd rectifying circuit 114, the 3rd rectifying circuit 114 and first
Rectifying circuit 111, the second rectifying circuit 112 and accumulator 113 are in parallel.In the implementation, rectification energy-storage module 110 can
, can be by the first rectifying circuit 111, the second rectifying circuit to be connected via tri- ends of A, B, C with power network, it is adaptable to three phase network
112 and the 3rd collectively rectified three-phase circuit of rectifying circuit 114.
Fig. 4 shows the circuit diagram of the rectification energy-storage module of Active Power Filter-APF according to an embodiment of the invention.One
Plant in possible implementation, as shown in figure 4, the first rectifying path 111 includes the first rectifying tube VT of series connection1With the second rectification
Pipe VT2, the first inductance L1The other end and the first rectifying tube VT1With the second rectifying tube VT2Series connection end connection；Second rectification is led to
Road 112 includes the 3rd rectifying tube VT of series connection3With the 4th rectifying tube VT4, the second inductance L2The other end and the 3rd rectifying tube VT3
With the 4th rectifying tube VT4Series connection end connection；3rd rectifying path 114 includes the 5th rectifying tube VT of series connection5With the 6th rectifying tube
VT6, the 3rd inductance L3The other end and the 5th rectifying tube VT5With the 6th rectifying tube VT6Series connection end connection.
In a kind of possible implementation, as shown in figures 2 and 3, accumulator 113 can include the first energy storage of series connection
The accumulator 1132 of circuit 1131 and second, one end of the first accumulator 1131 is connected with Switching Power Supply 120, the second energy storage electricity
The one end on road 1132 is connected with Switching Power Supply 120, the other end of the first accumulator 1133 and the second accumulator 1132 it is another
Connect and be grounded in one end.In addition, as shown in figure 4, the first accumulator 1131 can include the first electric capacity C in parallel1With the 3rd
Resistance R3, the second accumulator 1132 includes the second electric capacity C in parallel2With the 4th resistance R4。
In a kind of possible implementation, the first inductance L1First resistor R can be passed through1It is connected with power network, first resistor
R1Two ends can be connected with first switch K1, the second inductance L2Second resistance R can be passed through2It is connected with power network, second resistance R2
Two ends can be connected with second switch K2.However, first resistor R1With second resistance R2It is not essential, can all omits,
First resistor R can be only included1, or only include second resistance R2。
Fig. 5 shows the structural representation of Active Power Filter-APF according to another embodiment of the present invention.It is possible in one kind
In implementation, as shown in figure 5, Switching Power Supply 120 includes one-level Switching Power Supply 121 and secondary switch power supply 122, wherein one-level
The input of Switching Power Supply 121 is connected with rectification energy-storage module 110, output end and the secondary switch electricity of one-level Switching Power Supply 121
The input connection in source 122, one-level Switching Power Supply 121 and secondary switch power supply 122 can be DC-DC switch power source.
As shown in figure 5, control module 130 can include processor 131 and driving part 134, processor 131 connects with driving part 134
Connect, the output end of processor 131 and driving part 134 respectively with secondary switch power supply 122 is connected, driving part 134 and harmonic elimination
Module 140 is connected, and secondary switch power supply 122 supplies the first control voltage and second to processor 131 and driving part 134 respectively
Control voltage, processor 131 is in the case where secondary switch power supply 122 supplies the first control voltage, and control driving part 134 drives
Dynamic harmonic elimination module 140 eliminates signal to the power network output harmonic wave.Wherein, harmonic elimination module 140 is main brilliant by insulated gate bipolar
Body pipe ((English：Insulated Gate Bipolar Transistor, abbreviation：The device composition such as IGBT), therefore, drive division
Part 134 applies the second control voltage by the control end of from the IGBT to harmonic elimination module 140, to cause harmonic elimination module 140 to electricity
Net output harmonic wave eliminates signal.Second control voltage is so that the voltage of the IGBT opening and closings in harmonic elimination module 140, for example, can be
±12V。
In a kind of possible implementation, as shown in figure 3, control module 130 can also include sensor 132 and man-machine
Communicating circuit 133, the output of sensor 132 and man-machine communication's circuit 133 respectively with processor 131 and secondary switch power supply 122
End is all connected with, and Switching Power Supply 120 supplies the 3rd control voltage and the 4th control to sensor 132 and man-machine communication's circuit 133 respectively
Voltage processed, sensor 132 is detected in the power network in the case where secondary switch power supply 122 supplies the 3rd control voltage
Harmonic wave, harmonic wave of the processor 131 in the power network that sensor 132 is measured determine second control voltage,
In the case where processor 131 is judged as the externally fed exception of the Active Power Filter-APF, rectification energy-storage module 110 is utilized
The electric energy stored continues to supply control voltage to control module 130, to cause harmonic elimination module 140 smoothly out of service, and
It can be sent by man-machine communication's circuit 133 and represent the abnormal alarm signal of the externally fed of the Active Power Filter-APF, example
Such as beep, to remind operating personnel.
The present invention combines the internal wiring of Active Power Filter-APF and for the requirement for the power supply being controlled to wave filter,
Devise one kind and carry power supply module (for example can be the rectification energy-storage module for being capable of storage energy of above-mentioned implementation)
Active Power Filter-APF, being powered off suddenly because of power network, in the maloperation of Field Force or power network caused by other load faulties etc.
Active Power Filter-APF is in the case of the grid cut-off, it is possible to use the electric energy that its power supply module carried is stored leads in time
Cross processor, driving part etc. to be controlled wave filter, it is possible to pass through man-machine interface or communicating circuit teaching process person.From
And effectively prevent that Active Power Filter-APF is out of control, not only protect Active Power Filter-APF also to protect other on power network
Equipment is without damage.
In a kind of possible implementation, the value of first control voltage can be ± 5V, the second control electricity
The value of pressure can be ± 12V, and the value of the 3rd control voltage can be ± 15V, and the value of the 4th control voltage can be
24V.Certainly, if ensure that control module these parts can normal work, these control voltages can also be passed through
Secondary switch power supply is set to other values.
Explanation such as Fig. 1 to Fig. 5 is that the Active Power Filter-APF exemplified will not be made in the case of from grid cut-off below
Into implementing for damage.When Active Power Filter-APF accesses power network, according to the power circuit principle of Active Power Filter-APF,
DC bus capacitor group (i.e. the first electric capacity C1With the second electric capacity C2) can be by being pre-charged current-limiting resistance (i.e. first resistor R1With second
Resistance R2) and rectifying tube VT1~VT6In diode (VD1~VD6) charging electric power storage, as DC bus capacitor group C1And C2Voltage
When reaching setting value, Switching Power Supply startup work, the i.e. secondary line of Active Power Filter-APF works on power, active power filtering
Device enters normal mode of operation, for example, control drive module to apply to the IGBT of harmonic elimination module control end by control module
Control voltage, to eliminate signal to power network output harmonic wave.Balance resistance (i.e. 3rd resistor R in Fig. 43With the 4th resistance R4) work
With being to ensure DC bus capacitor group C1And C2Voltage deviation will not be excessive.
In the case of causing Active Power Filter-APF from grid cut-off when exception occurs in power network, due to having in the present invention
The power supply energy of the control module of active power filter can be by internal DC bus capacitor group C1And C2There is provided, and because harmonic wave is mended
The requirement repaid, DC bus capacitor group C1And C2Capacity it is also very big, be also enough at support and control module even if from grid cut-off
Manage device and driving part normal electricity consumption.It can so be detected by processor and judge whether power supply grid is abnormal, and according to electricity
Net abnormal conditions take corresponding safeguard measure, in time block IGBT drive signals, effectively prevent Active Power Filter-APF mistake
Control, so as to protect the miscellaneous equipment on Active Power Filter-APF and power network.
Switching Power Supply shown in Fig. 1~Fig. 4 includes two-stage Switching Power Supply (DC/DC), wherein one-level Switching Power Supply (DC/
DC) 121 antihypertensive effect is mainly played, i.e., the DC bus capacitor group C of Active Power Filter-APF1And C2Support voltage be reduced to 24V,
Be supplied to secondary switch power supply (DC/DC) 122, secondary switch power supply (DC/DC) 122 change again after to processor 131, sensing
Device 132, man-machine communication's circuit 133 and driving part are powered.Because the DC side operating voltage of Active Power Filter-APF reaches
800V, therefore one-level Switching Power Supply (DC/DC) employs the topological structure of two-transistor forward converter, as shown in Figure 6.
Internal control and driving power supply due to conventional Active Power Filter-APF depend on the electric power of power network, therefore,
The out of control of Active Power Filter-APF is easily caused in the case of external power dead electricity (i.e. Active Power Filter-APF from grid cut-off), from
And it is likely to result in the damage of the miscellaneous equipment on Active Power Filter-APF and power network.And the Active Power Filter-APF of the present invention carries confession
Electric module, it disclosure satisfy that the control electricity consumption and the drive of driving part of processor using the large bulk capacitance storage electric energy of itself
Electricity is employed, therefore, even if Active Power Filter-APF does not result in the out of control of Active Power Filter-APF not only from grid cut-off, also
It can judge soundly and handle, effectively protect the miscellaneous equipment on Active Power Filter-APF and power network.
Illustrate the structure of several Active Power Filter-APFs as comparative example below in conjunction with Fig. 7~Fig. 9.Fig. 7 is shown
It is related to the sketch of power pack inside existing Active Power Filter-APF, Fig. 8 show now widely used active electric power filter
Ripple device controls power solution.
It is abnormal short in load 1 in actual field application, it is assumed that Active Power Filter-APF bringing normally into operation as shown in Figure 7
Road and QF3 disjunctions will cause power network decompression or QF1 disjunctions, in this case, such as Fig. 8 institutes not in time or in the case of failure
The Universal switching power source (AC ends are power network incoming end) shown will be located now because the power network for losing AC supports voltage 220V
In a kind of state that can not be estimated, the dead electricity process for the multi-channel dc power supply being provided by it is difficult to keep synchronous, and power supply dead electricity is certainly
The generation of various failure conditions can so be caused, either mutual inductor sample failure, controller failure or power drive failure, all
It is possible to the invalid situation of controller output IGBT locking pulses occur, and overcompensation signal, by mistake thermal compensation signal even IBGT
The high-voltage signal of DC side is likely to be applied directly on power network, causes Active Power Filter-APF and load 1, the damage for loading 2
It is bad.
Equally illustrated, it is assumed that Active Power Filter-APF bringing normally into operation, due to Field Force's maloperation, divided by mistake manually with Fig. 7
Broken QF2, causes Active Power Filter-APF abnormal power-down, consistent with the abnormal short-circuit situation analysis conclusion of above-mentioned load 1, will have
Active Power Filter-APF may be caused to damage.
And for example in the case of Fig. 9, it is assumed that Active Power Filter-APF bringing normally into operation, bus is usually powered by inlet wire 1, mother
QF3 is switched to close a floodgate.When 1 dead electricity for some reason of inlet wire, the circuit breaker Q F2 automatic closings of inlet wire 2, to ensure the power supply of bus.Entering
Line 1 for some reason dead electricity, inlet wire 2 circuit breaker Q F2 not yet automatic closing at the time of, Active Power Filter-APF power supply power-off,
Also can occur because Active Power Filter-APF to power network supplies energy suddenly, busbar voltage moment rise, so that active electric power is filtered
The situation that electrical equipment on ripple device and bus is damaged.
With being compared with the comparative example shown in Fig. 7~Fig. 9, because the Active Power Filter-APF of the present invention is carried and can stored
The power supply module of electric energy, can be effectively prevented from above-mentioned situation, and it disclosure satisfy that using the large bulk capacitance storage electric energy of itself
The control electricity consumption and the driving electricity consumption of driving part of processor, therefore, as shown in figure 1, other in because of QF0 disjunctions or power network
Load faulty etc. causes Active Power Filter-APF to be disconnected with power network and make it that the externally fed of Active Power Filter-APF is abnormal
In the case of, the electric energy that control module still is able to be stored using power supply module continues normal work, does not result in not only so
Active Power Filter-APF is out of control, can also judge soundly and handle, and effectively protects Active Power Filter-APF and power network
On miscellaneous equipment.
The foregoing is only a specific embodiment of the invention, but protection scope of the present invention is not limited thereto, any
Those familiar with the art the invention discloses technical scope in, change or replacement can be readily occurred in, should all be contained
Cover within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (10)
1. a kind of Active Power Filter-APF, it is characterised in that including：
Rectification energy-storage module, is connected with power network, obtains direct current for carrying out rectification to the alternating current from the power network, and deposit
Storing up electricity energy；
Switching Power Supply, is connected with the rectification energy-storage module, for becoming to the direct current from the rectification energy-storage module
Pressure, to obtain control voltage；
Control module, is connected with the Switching Power Supply, in the case of supplying the control voltage in the Switching Power Supply, hair
Go out drive signal；And
Harmonic elimination module, is connected with the control module, believes for being eliminated according to the drive signal to the power network output harmonic wave
Number；
Wherein, the control module includes processor, is judged as that the outside of the Active Power Filter-APF supplies in the processor
In the case of electrical anomaly, the electric energy stored using the rectification energy-storage module continues to supply the control to the control module
Voltage, to cause the harmonic elimination module smoothly out of service.
2. Active Power Filter-APF according to claim 1, it is characterised in that the rectification energy-storage module includes：First
Inductance, the second inductance, the first rectifying circuit, the second rectifying circuit and accumulator, wherein,
One end of first inductance is connected with the power network, and the other end of first inductance connects with first rectifying circuit
Connect；
One end of second inductance is connected with the power network, and the other end of second inductance connects with second rectifying circuit
Connect；
First rectifying circuit, second rectifying circuit and the accumulator are in parallel.
3. Active Power Filter-APF according to claim 2, it is characterised in that the rectification energy-storage module also includes the 3rd
Inductance and the 3rd rectifying circuit, wherein, one end of the 3rd inductance is connected with the power network, the other end of the 3rd inductance
Be connected with the 3rd rectifying circuit, the 3rd rectifying circuit and first rectifying circuit, second rectifying circuit and
The accumulator is in parallel.
4. Active Power Filter-APF according to claim 2, it is characterised in that first rectifying circuit includes series connection
First rectifying tube and the second rectifying tube, the other end of first inductance and first rectifying tube and second rectifying tube
The connection of series connection end；
Second rectifying circuit includes the 3rd rectifying tube and the 4th rectifying tube of series connection, the other end of second inductance and institute
State the series connection end connection of the 3rd rectifying tube and the 4th rectifying tube.
5. Active Power Filter-APF according to claim 3, it is characterised in that the 3rd rectifying circuit includes series connection
5th rectifying tube and the 6th rectifying tube, the other end of the 3rd inductance and the 5th rectifying tube and the 6th rectifying tube
The connection of series connection end.
6. the Active Power Filter-APF according to any one of claim 2 to 5, it is characterised in that the accumulator bag
The first accumulator and the second accumulator of series connection are included,
One end of first accumulator is connected with the Switching Power Supply, one end of second accumulator and the switch
Power supply is connected, and the other end of the other end of first accumulator and second accumulator is connected and is grounded；
First accumulator includes in parallel the first electric capacity and 3rd resistor, and second accumulator includes in parallel the
Two electric capacity and the 4th resistance.
7. the Active Power Filter-APF according to any one of claim 2 to 5, it is characterised in that
First inductance is connected by first resistor with the power network, and the two ends of the first resistor are connected with first switch,
Second inductance is connected by second resistance with the power network, and the two ends of the second resistance are connected with second switch.
8. Active Power Filter-APF according to any one of claim 1 to 5, it is characterised in that the Switching Power Supply bag
One-level Switching Power Supply and secondary switch power supply are included, the input of the one-level Switching Power Supply is connected with the rectification energy-storage module,
The output end of the one-level Switching Power Supply is connected with the input of the secondary switch power supply.
9. Active Power Filter-APF according to claim 8, it is characterised in that the control module also includes drive division
Part, the processor is connected with the driving part, and the processor and the driving part are electric with the secondary switch respectively
The output end connection in source, the driving part is connected with the harmonic elimination module；
The secondary switch power supply supplies the first control voltage and the second control to the processor and the driving part respectively
Voltage,
The processor controls the driving part in the case where the secondary switch power supply supplies first control voltage
The control end of insulated gate bipolar transistor IGBT into the harmonic elimination module applies second control voltage, to cause
State harmonic elimination module and eliminate signal to the power network output harmonic wave.
10. Active Power Filter-APF according to claim 9, it is characterised in that the control module also include with it is described
Sensor and man-machine communication's circuit that processor and the secondary switch power supply are respectively connected,
The secondary switch power supply supplies the 3rd control voltage and the 4th to the sensor and man-machine communication's circuit respectively
Control voltage,
The sensor is detected in the power network in the case where the secondary switch power supply supplies the 3rd control voltage
Harmonic wave, the harmonic wave that the processor is measured according to the sensor determines second control voltage,
In the case where the processor is judged as the externally fed exception of the Active Power Filter-APF, by described man-machine logical
News circuit sends the alarm signal of the externally fed exception for representing the Active Power Filter-APF.
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| CN201510395884.XA CN104993486B (en) | 2015-07-07 | 2015-07-07 | Active Power Filter-APF |
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| CN113629849A (en) * | 2021-07-30 | 2021-11-09 | 科大智能电气技术有限公司 | Alternating current power supply and backup power supply system of energy controller and use method |
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| JPH08256482A (en) * | 1989-05-18 | 1996-10-01 | Hirotami Nakano | Uninterruptible power unit, and its insulation method and its power supply method |
| CN201204454Y (en) * | 2008-04-14 | 2009-03-04 | 陈家欣 | Active wave-filtering circuit |
| CN101938127B (en) * | 2010-08-17 | 2012-11-21 | 南京航空航天大学 | Single-phase and three-phase dual buck full-bridge parallel active power filter |
| CN202888833U (en) * | 2012-06-13 | 2013-04-17 | 湖北工业大学 | Power quality control system merged with active electric power filter and reactive compensation device |
| CN103595123B (en) * | 2013-11-27 | 2015-07-15 | 武汉康籁电气有限公司 | Dual-power-supply device and method applied to APF (Active Power Filter) system |
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