CN207625296U - A kind of active and passive combination power load three-phase imbalance regulating device - Google Patents
A kind of active and passive combination power load three-phase imbalance regulating device Download PDFInfo
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- CN207625296U CN207625296U CN201721555187.7U CN201721555187U CN207625296U CN 207625296 U CN207625296 U CN 207625296U CN 201721555187 U CN201721555187 U CN 201721555187U CN 207625296 U CN207625296 U CN 207625296U
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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
- Y02E40/30—Reactive power compensation
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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
- Y02E40/40—Arrangements for reducing harmonics
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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
- Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks
Abstract
The utility model belongs to the technical field of distribution network electric energy quality improvement, more particularly to a kind of active and passive combination power load three-phase imbalance regulating device.It includes mainly AC network, nonlinear load, capacitance compensation point mends circuit, capacitance compensation mends circuit altogether, IGBT compensation circuits, protection circuit, power quality adjust intelligent controller, it is characterised in that：Capacitance compensation point mends circuit, capacitance compensation mends circuit altogether, IGBT compensation circuits difference incoming transport power grid in parallel, power quality adjusts intelligent controller and controls connection capacitance compensation point benefit circuit respectively, capacitance compensation mends circuit altogether, IGBT compensation circuits, circuit is being mended positioned at capacitance compensation point, capacitance compensation mends circuit altogether, it is correspondingly arranged fuse protecting device respectively between IGBT compensation circuits and AC network, zero passage switch array is controlled to capacitance core group into Mobile state switching, suitable pwm switching signal is also exported to IGBT module simultaneously, the smooth adjustment of three-phase imbalance can be achieved；Reactive-load compensation can be taken into account and three-phase imbalance is adjusted；Fast response time, no-voltage flickering and fluctuation；The features such as no harmonic current pollution, safety higher, better reliability.
Description
Technical field
The utility model is related to distribution network electric energy qualities to administer research and development field, more particularly to a kind of active and passive combination is used
Electric load three-phase imbalance regulating device.
Background technology
Rural power grids pass through the extensive upgrading of rural power grids, have been equipped with certain basis, but due to historical development and
By service object, for wast rural area user, this objective factor is influenced, and the development of China's rural power grids is also in the prevalence of base at present
Infrastructure insufficient investment, grid structure are not very reasonable, the relatively backward feature of technological means, the development of whole rural low voltage network
There are bottlenecks, much cannot be satisfied its demand growth speed.
In this context, national grid proposes the target for building strong intelligent grid, and rural power grids are China nationals
The important component of power grid, county town and electricity for rural use have accounted for 50% of Analyzing Total Electricity Consumption or more, and development speed is swift and violent,
Rural power grids intelligent construction is that intelligent national grid builds indispensable important link, and rural power grids intelligence project is as transannular
Pilot project is saved, rural intelligent power distribution taiwan area, rural power grids power distribution automation, rural electricity consumption information acquisition system and agriculture are mainly carried out
Net battalion auxiliary tone management mode Optimum Synthesis Pilot project construction.
In order to implement the work side for building intelligent grid " overall planning, unified standard, pilot is leading, promotes comprehensively " comprehensively
Needle promotes rural power grids intelligent distribution area specifications of engineering construction and standardization, meets rural power grids intelligent development needs and visitor
New demand of the family to power supply capacity, power supply quality and electric service improves power supply capacity and power supply reliability, promotes operational management
Horizontal and service ability, the power distribution station construction of rural power grids intelligent low-pressure has been inexorable trend.
The harmfulness of three-phase imbalance：In low-voltage distribution network system, it is mostly single generally to take three-phase four-wire system, electric terminal
Phase load is single-phase mixed with three-phase load, and payload is different, the electricity consumption time is not fixed.Three are widely present in power grid
Phase current is uneven, and unbalance condition has irregularities, it is as follows to the main harm of distribution and electrical equipment：Additionally
The power attenuation for increasing circuit causes the unnecessary electric cost expenditure of user；The copper loss for increasing distribution transformer reduces it and goes out
Range degree influences it and runs reliably and with long-term；The output power for reducing motor makes its winding temperature increase, its safety of crisis
Operation；Imbalance of three-phase voltage may be further resulted in, the electrical equipment of carry is burnt out in the phase for causing voltage high, and voltage
The electrical equipment of carry can not normal use in a low phase.
Conventional three-phase imbalance regulative mode and its feature：
1) electronics phase-change switch is installed
According to system three-phase imbalance situation, by electronic switch, single-phase load is switched to suitable phase.Need according to
All single-phase or two phase loads are divided into several groups by ABC three-phases, and every group carries out commutation control with an electronic switch.From one
Determine to alleviate three-phase imbalance in degree, but when dynamic change occurs for every group of internal loading or grouping is inaccurate, system is always
There can be three-phase imbalance.In addition, in commutation process, there is also voltage flicker and fall.
2) switching is alternate and split-phase capacitor
According to Wang Shi theorems, switching phase-splitting capacitor is adjusted per phase reactive current, switching capacitive coupling device, and transfer is alternate
Watt current.The specific regulating effect of three-phase imbalance depends on the number of packet and appearance of capacitive coupling device and phase-splitting capacitor
Magnitude is poor.In actual use, due to the discreteness of capacitance, still there is injustice to a certain extent for system
Weighing apparatus, and when load quickly changes, the round-trip switching of capacitance is frequent, can accelerate its aging.In addition, in some application scenarios, nothing
Method takes into account reactive-load compensation simultaneously and three phase unbalance current is adjusted.
3) static passive compensation device is used
The static passive compensation device (SVC) most generally used, generally fixed capacity device (FC)+thyristor control electricity
Anti- device (TCR).According to Steinmetz theories and instantaneous reactive algorithm, computing system three-phase compensates admittance, controls each of TCR
Phase Trigger Angle adjusts split-phase and alternate reactive power, realizes the smooth adjustment of three phase unbalance current.In actual use process
In, TCR itself will produce some low-order harmonic electric currents, when the Filter Parameter Design of FC is improper, can also cause Harmonics amplification.
Invention content
There is provided that a kind of intelligence degree is higher active and nothing the purpose of this utility model is to overcome disadvantages mentioned above
Source combines power load three-phase imbalance regulating device, it has the smooth adjustment that three-phase imbalance can be achieved；It can take into account idle
Compensation and three-phase imbalance are adjusted；Fast response time, no-voltage flickering and fluctuation；No harmonic current pollution, safety higher can
The features such as more preferable by property.
One of the purpose of this utility model is to provide a kind of safer and reliable intelligent power distribution network electric energy quality and controls
Reason
In order to achieve the above objectives, the utility model adopts the following technical solution：A kind of active and passive combination power load
Three-phase imbalance regulating device, it is characterised in that：Circuit is mended including AC network, nonlinear load, capacitance compensation point, capacitance is mended
It repays total benefit circuit, IGBT compensation circuits, protection circuit, power quality and adjusts intelligent controller, it is characterised in that：Capacitance compensation point
Mend circuit, capacitance compensation mends circuit altogether, incoming transport power grid in parallel, power quality adjust intelligent control to IGBT compensation circuits respectively
Device controls connection capacitance compensation point benefit circuit respectively, capacitance compensation mends circuit, IGBT compensation circuits altogether, positioned at capacitance compensation point
Mend circuit, capacitance compensation is mended be correspondingly arranged fuse protecting device respectively between circuit, IGBT compensation circuits and AC network altogether.
Further, above-mentioned power quality adjusting intelligent controller includes：Central processing unit, analog quantity acquisition circuit,
Control output circuit, display device, fundamental wave reactive power detection circuit, central processing unit distribution and analog quantity acquisition circuit, control are defeated
Go out circuit, display device, the electrical connection of fundamental wave reactive power detection circuit.
Further, the analog quantity acquisition circuit that the power quality adjusts intelligent controller includes the first current acquisition electricity
Road, the second current collection circuit, first voltage Acquisition Circuit, the first current collection circuit with for incuding AC network electric current
First current transformer group is electrically connected, and the second electric current is electrically connected with the second current transformer group for compensating side electric current for inductance capacitance
It connects, first voltage Acquisition Circuit is electrically connected with AC network.
Further, the control output circuit of the power quality adjusting intelligent controller includes：Capacitive coupling control is defeated
Go out circuit, split-phase capacitor control output circuit, IGBT compensation control output circuits, split-phase capacitor control output circuit, alternate electricity
Hold control output circuit, IGBT compensation control output circuit distributions mend circuit with capacitance compensation point, capacitance compensation mends circuit altogether,
The control connection of IGBT compensation circuits.
Further, circuit, IGBT compensation circuits are being mended altogether positioned at capacitance compensation point benefit circuit, capacitance compensation and is being exchanged
First reactance protector group, the second reactance protector group, third reactance protector group are set between power grid.
Further, the 4th reactance protector is being set between third reactance protector group and IGBT compensation circuits
Group, in the setting control switching group between third reactance protector group and the 4th reactance protector group.
Further, in two tip nodes positioned at above-mentioned control switching group and protective resistance is connect.
Further, capacitive coupling control output circuit, split-phase capacitor control output circuit control capacitance compensation point respectively
Mend circuit, capacitance compensation mends the first switching control switch of circuit, the second switching control switch altogether.
Further, AC network includes A phases power supply, B phases power supply, C phases power supply, N lines, is set between N lines and IGBT circuits
Set the 5th reactance protection group.
The utility model has the advantage of：The smooth adjustment of three-phase imbalance can be achieved；Reactive-load compensation and three-phase can be taken into account
Imbalance is adjusted；Fast response time, no-voltage flickering and fluctuation；No harmonic current pollution, safety higher, better reliability etc.
Feature.
Description of the drawings：
Attached drawing 1 is that one kind provided by the embodiments of the present application be active and passive combination power load three-phase imbalance regulating device
Power grid application schematic diagram；
Attached drawing 2 is that one kind provided by the embodiments of the present application be active and passive combination power load three-phase imbalance regulating device
Circuit topography schematic diagram；
Attached drawing 3 is that one kind provided by the embodiments of the present application be active and passive combination power load three-phase imbalance regulating device
Capacitive coupling three-phase compensation schematic diagram；
Attached drawing 4 is that one kind provided by the embodiments of the present application be active and passive combination power load three-phase imbalance regulating device
Single-phase capacitance three-phase separate-supplement schematic diagram；
Attached drawing 5 is that one kind provided by the embodiments of the present application be active and passive combination power load three-phase imbalance regulating device
Three phase unbalance current Principles of Regulation figure；
Attached drawing 6 is that one kind provided by the embodiments of the present application be active and passive combination power load three-phase imbalance regulating device
Voltage support (voltage finely compensates) schematic diagram；
Attached drawing 7 is that one kind provided by the embodiments of the present application be active and passive combination power load three-phase imbalance regulating device
Harmonic filtration principle schematic diagram；
Attached drawing 8 is the attachment structure schematic diagram that power quality provided by the embodiments of the present application adjusts intelligent controller；
Attached drawing 9 is that one kind provided by the embodiments of the present application be active and passive combination power load three-phase imbalance regulating device
Control flow chart.
Specific implementation mode
Embodiment 1：As shown in attached drawing 1-2, a kind of active and passive combination power load three-phase imbalance regulating device,
It is characterized in that：Including AC network, nonlinear load, capacitance compensation point mend circuit, capacitance compensation mends circuit altogether, IGBT compensation electricity
Road, protection circuit, power quality adjust intelligent controller, it is characterised in that：Capacitance compensation point mends circuit, capacitance compensation mends electricity altogether
Incoming transport power grid in parallel, power quality adjust intelligent controller and control connection capacitance benefit respectively respectively for road, IGBT compensation circuits
Repay point and to mend a circuit, capacitance compensation mends circuit, IGBT compensation circuits altogether, mend circuit positioned at capacitance compensation point, capacitance compensation is mended altogether
It is correspondingly arranged fuse protecting device respectively between circuit, IGBT compensation circuits and AC network.
As shown in figure 8, in a kind of further embodiment, above-mentioned power quality adjusts intelligent controller and includes：Center
Processor, analog quantity acquisition circuit, control output circuit, display device, fundamental wave reactive power detection circuit, central processing unit distribution with
Analog quantity acquisition circuit, control output circuit, display device, the electrical connection of fundamental wave reactive power detection circuit, power quality adjust intelligence
The analog quantity acquisition circuit of controller includes the first current collection circuit, the second current collection circuit, first voltage Acquisition Circuit,
First current collection circuit is electrically connected with the first current transformer group for incuding AC network electric current, the second electric current be used for
Inductance capacitance compensates the second current transformer group electrical connection of side electric current, and first voltage Acquisition Circuit is electrically connected with AC network.
In the present embodiment, collected current information, information of voltage are fed back to central processing by analog quantity acquisition circuit
Device, the processing for carrying out data, fundamental wave reactive power detection circuit will collect electric current and information of voltage handled after to facilitate
Central processing unit subsequently makes corresponding control output.
In a kind of further embodiment, the control output circuit that power quality adjusts intelligent controller includes：Alternate electricity
Hold control output circuit, split-phase capacitor control output circuit, IGBT and compensates control output circuit, split-phase capacitor control output electricity
Road, capacitive coupling control output circuit, IGBT compensation control output circuit distributions mend circuit, capacitance compensation with capacitance compensation point
Circuit, the control connection of IGBT compensation circuits are mended altogether, specifically, capacitive coupling control output circuit, split-phase capacitor control output electricity
Road can be in a manner of exporting corresponding opening and closing contact as needed, and IGBT compensation control output circuit drivings IGBT is compensated
Circuit should then increase the driving circuit with matched model as needed, be the common knowledge of those skilled in the art, therefore
It is not described in detail herein.
In a kind of preferred embodiment, mend circuit positioned at capacitance compensation point, capacitance compensation is mending circuit altogether, IGBT compensation electricity
First reactance protector group, the second reactance protector group, third reactance protector group are set between road and AC network, in this reality
It applies in example, can further reduce in parallel and concatenated harmonic wave, and further play the role of limitation and shove.
In a kind of preferred embodiment, further to facilitate the switching control of control IGBT compensation circuits, positioned at the
Between three reactance protector groups and IGBT compensation circuits be arranged the 4th reactance protector group, positioned at third reactance protector group with
Setting control switching group between 4th reactance protector group, control switching group can be breaker group or contactor group.
Preferably, in two tip nodes positioned at above-mentioned control switching group and protective resistance is connect, certain can be limited in
The generation shoved during capacitance compensation.
Capacitive coupling control output circuit, split-phase capacitor control output circuit control respectively capacitance compensation point mend circuit,
Capacitance compensation mends the first switching control switch of circuit, the second switching control switch, specifically in implementation process, the first switching altogether
Control switch, the capacitance in capacitance compensation point benefit circuit, capacitance compensation mend circuit altogether should be arranged in the second switching control switch
Forward position.
Preferably, AC network includes A phases power supply, B phases power supply, C phases power supply, N lines, is arranged between N lines and IGBT circuits
5th reactance protection group, its object is to raise the voltage of rectification or inversion neutral point.
Preferably, alternating voltage and filter circuit is connect, it can be with filter 23 .5.7 subharmonic.
Embodiment 2：Using one kind described above it is active with passive combination power load three-phase imbalance regulating device into
Row electric energy is adjusted.
1. as shown in Figure 1, by above-mentioned active and passive combination power load three-phase imbalance regulating device, it is connected in parallel on and matches
In electric network, by the real-time acquisition system current signal of the first current transformer group (CT in Fig. 1), detected by internal proprietary
Circuit and the quick analyzing processing of controller, to judge system tri-phase unbalance factor, while calculate three-phase equilibrium switching current value,
Fundamental wave imbalance and each harmonic composition and reactive power situation (including power factor).
The calculation formula of its tri-phase unbalance factor is：
Wherein, ΔI%For tri-phase unbalance factor, the main calculation basis of device in order to control；ImaxFor maximum phase current；IminFor
Minimum phase current；∑ I is three-phase average current.
2. using the main circuit topological structure similar to active filter, using IGBT compensation circuits (Q1 in Fig. 2~
Q6) composition active type three-phase imbalance adjusts fine compensation part；With capacitive coupling (C1~C3 in Fig. 2) and split-phase capacitor
(NCa~NCc in Fig. 2) forms passive three-phase imbalance and adjusts rough compensation part.As shown in Figure 2, Figure 3, Figure 4.
3. acquiring load current signal, fundamental wave reactive power detection circuit in real time by the first current transformer (CT in Fig. 1)
Rapid extraction fundamental wave reactive power therein, fundamental wave is uneven and each harmonic composition is controlled in power quality adjusting intelligent controller
The first switching control switch (FK1~3 in Fig. 2, FK4~6) is made to the capacitance core group (NCa in C1~C3 and Fig. 2 in Fig. 2
~NCc) into Mobile state switching, realize the rough compensation of reactive power and out-of-balance current.
4. the side capacitor compensation unit (Fig. 3 and Fig. 4) increase by one group of second current transformer group (Lha in Fig. 2~
C), the compensation electric current for monitoring capacitor cell.Power quality adjust intelligent controller by the compensation electric current of capacitor cell with
The difference of the first current transformer (CT in Fig. 1) electric current is calculated, to determine that can capacitor compensation unit meet three-phase
Imbalance compensation and reactive compensation requirements.
5. when capacitor compensation unit cannot meet out-of-balance current and idle compensation requirement, power quality adjusts intelligence
The IGBT compensation control output circuit of controller exports suitable PWM switching signals and IGBT compensation circuits, inversion is given to go out three-phase width
The fundamental current of degree and phase-adjustable, realizes the fine compensation of out-of-balance current.
6. as shown in figure 5, by power network current tune in the state of power grid three-phase current unbalance caused by unbalanced load
Section is the equilibrium state of 100A, and wherein A phase loads electricity consumption is 52A, if power grid is adjusted to 100A so phase current offsets
Can residue 48A, similarly C phase currents offset lack 48A, it is a kind of active to adjust dress with passive combination power load three-phase imbalance
C phases can be transferred to by the drift current 48A of A phases by setting, in the case of reaching the imbalance electricity consumption of proof load side, the three-phase of power grid
Current balance type.
7. when capacitor compensation unit cannot meet the compensation requirement of reactive voltage, power quality adjusts intelligent controller
IGBT compensation control output circuit (IGBT of Fig. 5 drives) output of the central processing unit control of (controller of Fig. 5) is suitable
Pwm switching signal gives IGBT modules, inversion to go out the fundamental voltage of three-phase amplitude and phase-adjustable, realizes the fine of reactive voltage
Compensation, usually can be by power factor compensation to 0.99~1.
8. as shown in fig. 6, being sampled by offset voltage point and being connected and fed back to central processing unit, offset voltage can
It is handled with being acquired to central processing unit by second voltage Acquisition Circuit, power quality adjusting intelligent controller be (Fig. 6's
Controller) central processing unit obtain carrying out analyzing processing to compensation point information of voltage at once after information of voltage data, to judge
Whether compensation point voltage is more than setting value, and when voltage is less than setting lower limit (Umin) value, power quality adjusts intelligent controller
Central processing unit control IGBT compensation circuits (IGBT of Fig. 6 drives) output capacity current, voltage is promoted, when voltage is higher than
When setting the upper limit (Umax) value, voltage is reduced, to realize that each phase voltage stabilization is run in normal range (NR).
9. as shown in Figure 7.The three-phase current waveform of acquisition ac grid system in real time, and extract fundamental current just
Sequence, negative phase-sequence and zero sequence waveform, the reactive-load compensation of integrated system and three-phase imbalance demand, power quality adjust intelligent controller
Central processing unit synthesizing in situ command adapted thereto waveform gives IGBT compensation circuits, output can bucking-out system fractional harmonic electric current, reach
To the fractional harmonic function of current for inhibiting load to generate.
10. main-process stream is as shown in Figure 9.
Certainly, it these are only the preferred embodiment of the utility model, the use scope of the utility model not limited with this,
Therefore it is every made in the utility model principle it is equivalent change should be included in the protection domain of utility model.
Claims (9)
1. a kind of active and passive combination power load three-phase imbalance regulating device, it is characterised in that：Including AC network, non-
Linear load, capacitance compensation point mend circuit, capacitance compensation mends circuit altogether, IGBT compensation circuits, protection circuit, power quality are adjusted
Intelligent controller, it is characterised in that：Capacitance compensation point mends circuit, capacitance compensation mends circuit altogether, IGBT compensation circuits are in parallel respectively
Incoming transport power grid, power quality adjusting intelligent controller controls connection capacitance compensation point benefit circuit respectively, capacitance compensation is mended altogether
Circuit, IGBT compensation circuits are being mended circuit, IGBT compensation circuits positioned at capacitance compensation point benefit circuit, capacitance compensation and are being exchanged altogether
Fuse protecting device is correspondingly arranged between power grid respectively.
2. one kind according to claim 1 is active with passive combination power load three-phase imbalance regulating device, feature
It is：Above-mentioned power quality adjusts intelligent controller：Central processing unit, analog quantity acquisition circuit, control output circuit,
Display device, fundamental wave reactive power detection circuit, central processing unit distribution are filled with analog quantity acquisition circuit, control output circuit, display
It sets, the electrical connection of fundamental wave reactive power detection circuit.
3. one kind according to claim 2 is active with passive combination power load three-phase imbalance regulating device, feature
It is：The analog quantity acquisition circuit that the power quality adjusts intelligent controller includes the first current collection circuit, the second electric current
Acquisition Circuit, first voltage Acquisition Circuit, the first current collection circuit and the first electric current for incuding AC network electric current are mutual
Sensor group is electrically connected, and the second electric current is electrically connected with the second current transformer group for compensating side electric current for inductance capacitance, the first electricity
Pressure Acquisition Circuit is electrically connected with AC network.
4. one kind according to claim 3 is active with passive combination power load three-phase imbalance regulating device, feature
It is：The control output circuit that the power quality adjusts intelligent controller includes：Capacitive coupling control output circuit, split-phase electricity
Hold control output circuit, IGBT compensates control output circuit, split-phase capacitor control output circuit, capacitive coupling control output electricity
Road, IGBT compensation control output circuit distributions mend circuit with capacitance compensation point, capacitance compensation mends circuit, IGBT compensation circuit controls altogether
System connection.
5. one kind according to claim 4 is active with passive combination power load three-phase imbalance regulating device, feature
It is：Mend circuit positioned at capacitance compensation point, capacitance compensation is mended the is arranged between circuit, IGBT compensation circuits and AC network altogether
One reactance protector group, the second reactance protector group, third reactance protector group.
6. one kind according to claim 5 is active with passive combination power load three-phase imbalance regulating device, feature
It is：4th reactance protector group is being set between third reactance protector group and IGBT compensation circuits, positioned at third
Setting control switching group between reactance protector group and the 4th reactance protector group.
7. one kind according to claim 6 is active with passive combination power load three-phase imbalance regulating device, feature
It is：In two tip nodes positioned at above-mentioned control switching group and connect protective resistance.
8. one kind according to claim 6 is active with passive combination power load three-phase imbalance regulating device, feature
It is：Capacitive coupling control output circuit, split-phase capacitor control output circuit control capacitance compensation point and mend circuit, capacitance benefit respectively
Repay total the first switching control switch for mending circuit, the second switching control switch.
9. one kind according to claim 6 is active with passive combination power load three-phase imbalance regulating device, feature
It is：AC network includes A phases power supply, B phases power supply, C phases power supply, N lines, and the 5th reactance is arranged between N lines and IGBT circuits and protects
Shield group.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721555187.7U CN207625296U (en) | 2017-11-20 | 2017-11-20 | A kind of active and passive combination power load three-phase imbalance regulating device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721555187.7U CN207625296U (en) | 2017-11-20 | 2017-11-20 | A kind of active and passive combination power load three-phase imbalance regulating device |
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| CN207625296U true CN207625296U (en) | 2018-07-17 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107769230A (en) * | 2017-11-20 | 2018-03-06 | 广东正诚电气科技有限公司 | A kind of active and passive combination power load three-phase imbalance adjusting means |
| CN110783930A (en) * | 2019-10-18 | 2020-02-11 | 宁波恒晨电力建设有限公司 | Device and system for managing power quality of transformer area |
| CN111224412A (en) * | 2018-11-23 | 2020-06-02 | 中车唐山机车车辆有限公司 | Micro-rail traffic power supply system, balancing device and control method thereof |
| CN111884238A (en) * | 2020-08-05 | 2020-11-03 | 西安西变组件有限公司 | Electric energy quality treatment device of low-voltage distribution network |
| CN112305361A (en) * | 2020-11-06 | 2021-02-02 | 江苏省电力试验研究院有限公司 | Temperature rise test three-phase unbalanced current compensation system and control method |
-
2017
- 2017-11-20 CN CN201721555187.7U patent/CN207625296U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107769230A (en) * | 2017-11-20 | 2018-03-06 | 广东正诚电气科技有限公司 | A kind of active and passive combination power load three-phase imbalance adjusting means |
| CN111224412A (en) * | 2018-11-23 | 2020-06-02 | 中车唐山机车车辆有限公司 | Micro-rail traffic power supply system, balancing device and control method thereof |
| CN110783930A (en) * | 2019-10-18 | 2020-02-11 | 宁波恒晨电力建设有限公司 | Device and system for managing power quality of transformer area |
| CN111884238A (en) * | 2020-08-05 | 2020-11-03 | 西安西变组件有限公司 | Electric energy quality treatment device of low-voltage distribution network |
| CN112305361A (en) * | 2020-11-06 | 2021-02-02 | 江苏省电力试验研究院有限公司 | Temperature rise test three-phase unbalanced current compensation system and control method |
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