CN107769230A - A kind of active and passive combination power load three-phase imbalance adjusting means - Google Patents
A kind of active and passive combination power load three-phase imbalance adjusting means Download PDFInfo
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- CN107769230A CN107769230A CN201711159202.0A CN201711159202A CN107769230A CN 107769230 A CN107769230 A CN 107769230A CN 201711159202 A CN201711159202 A CN 201711159202A CN 107769230 A CN107769230 A CN 107769230A
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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
- H02J3/26—Arrangements for eliminating or reducing asymmetry in polyphase networks
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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
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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
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
- H02J3/1821—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators
- H02J3/1835—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators with stepless control
- H02J3/1842—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators with stepless control wherein at least one reactive element is actively controlled by a bridge converter, e.g. active filters
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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
-
- 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
-
- 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
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Abstract
The invention belongs to the technical field that distribution network electric energy quality is administered, more particularly to a kind of active and passive combination power load three-phase imbalance adjusting means.It mainly includes AC network, nonlinear load, capacitance compensation point benefit circuit, capacitance compensation mends circuit altogether, IGBT compensation circuits, protection circuit, quality of power supply regulation intelligent controller, it is characterised in that：Capacitance compensation point mends circuit, capacitance compensation mends circuit altogether, IGBT compensation circuits distinguish incoming transport power network in parallel, quality of power supply regulation intelligent controller controls connection capacitance compensation point to mend circuit respectively, capacitance compensation mends circuit altogether, IGBT compensation circuits, circuit is being mended positioned at capacitance compensation point, capacitance compensation mends circuit altogether, fuse protecting device is correspondingly arranged respectively between IGBT compensation circuits and AC network, control zero passage switch array enters Mobile state switching to capacitance core group, suitable pwm switching signal is also exported to IGBT module simultaneously, the smooth adjustment of three-phase imbalance can be achieved；Reactive-load compensation and three-phase imbalance regulation can be taken into account；Fast response time, no-voltage flickering and fluctuation；Polluted without harmonic current, security is higher, the features such as better reliability.
Description
Technical field
Research and development fields is administered the present invention relates to distribution network electric energy quality, more particularly to a kind of active is born with passive combination electricity consumption
Lotus three-phase imbalance adjusting means.
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 reason and
By service object, for numerous rural subscribers, this objective factor is influenceed, and the development of China's rural power grids is also in the prevalence of base at present
The characteristics of Infrastructure insufficient investment, grid structure are not very reasonable, and technological meanses fall behind relatively, the development of overall rural low voltage network
Bottleneck be present, can not much meet 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 network, county town and electricity for rural use have accounted for more than the 50% of Analyzing Total Electricity Consumption, and development speed is swift and violent,
Rural power grids intelligent construction is that intelligent national grid builds indispensable important step, and rural power grids intellectuality project is as transannular
Pilot project is saved, mainly carries out rural intelligent power distribution taiwan area, rural power grids power distribution automation, rural electricity consumption information acquisition system and agriculture
Net battalion auxiliary tone management mode Optimum Synthesis Pilot project construction.
In order to implement the work side for building intelligent grid " making overall planning, unified standard, pilot are leading, promote comprehensively " comprehensively
Pin, rural power grids intelligent distribution area specifications of engineering construction and standardization are lifted, meets rural power grids intelligent development needs and visitor
New demand of the family to power supply capacity, power supply quality and electric service, power supply capacity and power supply reliability are improved, lift 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, three-phase four-wire system is typically taken, electric terminal is mostly single
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 network
Phase current is uneven, and unbalance condition has irregularities, and its main harm to distribution and electrical equipment is as follows：Additionally
The power attenuation of circuit is added, causes the electric cost expenditure that user is unnecessary；The copper loss of distribution transformer is added, it is reduced and goes out
Range degree, influence it and run reliably and with long-term；The power output of motor is reduced, raises its winding temperature, its safety of crisis
Operation；Imbalance of three-phase voltage may be further resulted in, causes the electrical equipment of carry in the high phase of voltage to burn out, 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
ABC three-phases, all single-phase or two phase loads are divided into some groups, 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 packet is not accurate enough, system is all the time
There can be three-phase imbalance.In addition, in commutation process, voltage flicker also be present and fall.
2) switching is alternate and split-phase capacitor
According to Wang Shi theorems, switching phase-splitting capacitor, adjust per phase reactive current, switching capacitive coupling device, transfer is alternate
Watt current.The specific regulating effect of three-phase imbalance, depending on capacitive coupling device and the number of packet and appearance of 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 switching of electric capacity is frequent, can accelerate its aging.In addition, in some application scenarios, nothing
Method takes into account reactive-load compensation and three phase unbalance current regulation simultaneously.
3) static passive compensation device is used
The static passive compensation device (SVC) most generally used, generally fixed capacity device (FC)+IGCT control electricity
Anti- device (TCR).According to Steinmetz is theoretical and instantaneous reactive algorithm, the compensation admittance of computing system three-phase, control that TCR's is each
Phase Trigger Angle, split-phase and alternate reactive power are adjusted, realize the smooth adjustment of three phase unbalance current.In actual use process
In, TCR can produce some low-order harmonic electric currents in itself, when FC Filter Parameter Design is improper, can also cause Harmonics amplification.
The content of the invention
There is provided a kind of intelligence degree higher active and passive knot the invention aims to overcome disadvantages mentioned above
Electric load three-phase imbalance adjusting means is shared, it has the smooth adjustment that three-phase imbalance can be achieved；Reactive-load compensation can be taken into account
Adjusted with three-phase imbalance；Fast response time, no-voltage flickering and fluctuation；Polluted without harmonic current, security is higher, reliability
The features such as more preferable.
An object of the present invention is to provide a kind of safer and reliable intelligent distribution network power quality controlling
To reach above-mentioned purpose, the present invention adopts the following technical scheme that：A kind of active and passive combination power load three-phase
Uneven adjusting means, it is characterised in that：It is common including AC network, nonlinear load, capacitance compensation point benefit circuit, capacitance compensation
Mend circuit, IGBT compensation circuits, protection circuit, quality of power supply regulation intelligent controller, it is characterised in that：Capacitance compensation point mends electricity
Road, capacitance compensation mend circuit altogether, IGBT compensation circuits distinguish incoming transport power network in parallel, quality of power supply regulation intelligent controller point
Capacitance compensation, which Kong Zhi not connected, divides benefit circuit, capacitance compensation to mend circuit, IGBT compensation circuits altogether, and electricity is being mended positioned at capacitance compensation point
Road, capacitance compensation are mended be correspondingly arranged fuse protecting device respectively between circuit, IGBT compensation circuits and AC network altogether.
Further, above-mentioned quality of power supply regulation 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, fundamental wave reactive power detection circuit electrical connection.
Further, the analog quantity acquisition circuit of the quality of power supply regulation intelligent controller includes the first current acquisition electricity
Road, the second current collection circuit, first voltage Acquisition Circuit, the first current collection circuit sense AC network electric current with being used for
First current transformer group electrically connects, and the second electric current for the second current transformer group of inductance capacitance compensation side electric current with being electrically connected
Connect, first voltage Acquisition Circuit electrically connects with AC network.
Further, the control output circuit of the quality of power supply regulation 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 with exchanging positioned at capacitance compensation point benefit circuit, capacitance compensation
First reactance protector group, the second reactance protector group, the 3rd reactance protector group are set between power network.
Further, the 4th reactance protector is being set between the 3rd reactance protector group and IGBT compensation circuits
Group, controlling switch group is being set between the 3rd reactance protector group and the 4th reactance protector group.
Further, in two tip nodes positioned at above-mentioned controlling switch 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 controlling switch of circuit, the second switching controlling 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
Put the 5th reactance protection group.
The advantage of the invention is that：The smooth adjustment of three-phase imbalance can be achieved；Reactive-load compensation can be taken into account and three-phase is uneven
Weighing apparatus regulation；Fast response time, no-voltage flickering and fluctuation；Polluted without harmonic current, security is higher, the spy such as better reliability
Point.
Brief description of the drawings：
Fig. 1 is a kind of active and passive combination power load three-phase imbalance adjusting means of the embodiment of the present application offer
Power grid application schematic diagram；
Fig. 2 is a kind of active and passive combination power load three-phase imbalance adjusting means of the embodiment of the present application offer
Circuit topography schematic diagram；
Fig. 3 is a kind of active and passive combination power load three-phase imbalance adjusting means of the embodiment of the present application offer
The schematic diagram of capacitive coupling three-phase total compensation；
Fig. 4 is a kind of active and passive combination power load three-phase imbalance adjusting means of the embodiment of the present application offer
Single-phase capacitance three-phase separate-supplement schematic diagram；
Fig. 5 is a kind of active and passive combination power load three-phase imbalance adjusting means of the embodiment of the present application offer
Three phase unbalance current Principles of Regulation figure；
Fig. 6 is a kind of active and passive combination power load three-phase imbalance adjusting means of the embodiment of the present application offer
Voltage support (voltage finely compensates) schematic diagram；
Fig. 7 is a kind of active and passive combination power load three-phase imbalance adjusting means of the embodiment of the present application offer
Harmonic filtration principle schematic diagram；
Fig. 8 is the attachment structure schematic diagram that the quality of power supply that the embodiment of the present application provides adjusts intelligent controller；
Fig. 9 is a kind of active and passive combination power load three-phase imbalance adjusting means of the embodiment of the present application offer
Control flow chart.
Embodiment
Embodiment 1：As shown in accompanying drawing 1-2, a kind of active and passive combination power load three-phase imbalance adjusting means, its
It is characterised by：Including AC network, nonlinear load, capacitance compensation point mends circuit, capacitance compensation mends circuit altogether, IGBT compensation electricity
Road, protection circuit, quality of power supply regulation intelligent controller, it is characterised in that：Capacitance compensation point mends circuit, capacitance compensation mends electricity altogether
Incoming transport power network in parallel is distinguished on road, IGBT compensation circuits, and quality of power supply regulation intelligent controller controls connection electric capacity to mend respectively
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
Fuse protecting device is correspondingly arranged respectively between circuit, IGBT compensation circuits and AC network.
As shown in figure 8, in a kind of further embodiment, above-mentioned quality of power supply regulation intelligent controller 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, fundamental wave reactive power detection circuit electrical connection, quality of power supply regulation 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 electrically connects with the first current transformer group for sensing AC network electric current, and the second electric current is with being used for
The second current transformer group electrical connection of inductance capacitance compensation side electric current, first voltage Acquisition Circuit electrically connect with AC network.
In the present embodiment, the current information collected, 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 controls output corresponding to subsequently making.
In a kind of further embodiment, the control output circuit of quality of power supply regulation intelligent controller includes：Alternate electricity
Hold control output circuit, split-phase capacitor control output circuit, IGBT compensation control output circuits, 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 opening and closing contact corresponding to exporting as needed, and compensates control output circuit driving IGBT compensation for IGBT
Circuit should then increase the drive circuit with matched model as needed, and it is the common knowledge of those skilled in the art, therefore
It is not described in detail herein.
In a kind of preferred embodiment, circuit, IGBT compensation electricity are being mended altogether positioned at capacitance compensation point benefit circuit, capacitance compensation
First reactance protector group, the second reactance protector group, the 3rd reactance protector group are set between road and AC network, in this reality
Apply in example, can further reduce in parallel and series connection harmonic wave, and further play a part of limitation and shove.
In a kind of preferred embodiment, for the further convenient switching control for controlling IGBT compensation circuits, positioned at the
Between three reactance protector groups and IGBT compensation circuits set the 4th reactance protector group, positioned at the 3rd reactance protector group with
Controlling switch group is set between the 4th reactance protector group, and controlling switch group can be breaker group or contactor group.
Preferably, in two tip nodes positioned at above-mentioned controlling switch group and protective resistance is connect, can be necessarily 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 controlling switch of circuit, the second switching controlling switch, specifically in implementation process, the first switching altogether
Controlling switch, the second switching controlling switch should be arranged on capacitance compensation point benefit circuit, capacitance compensation mends electric capacity in circuit altogether
Forward position.
Preferably, 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
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, can be with filter 23 .5.7 subharmonic.
Embodiment 2：A kind of active entered using described above with passive combination power load three-phase imbalance adjusting means
Row electric energy is adjusted.
1. as shown in figure 1, by above-mentioned active and passive combination power load three-phase imbalance adjusting means, it is connected in parallel on and matches somebody with somebody
In electric network, by the first current transformer group (CT in Fig. 1) real-time acquisition system current signal, detected by internal proprietary
Circuit and controller quickly analyze and process, 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%It is the main calculation basis of controller for tri-phase unbalance factor；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 the fine compensation part of active type three-phase imbalance regulation) is formed；With capacitive coupling (C1~C3 in Fig. 2) and split-phase capacitor
The rough compensation part of (NCa~NCc in Fig. 2) composition passive three-phase imbalance regulation.As shown in Fig. 2, Fig. 3, Fig. 4.
3. load current signal, fundamental wave reactive power detection circuit are gathered by the first current transformer (CT in Fig. 1) in real time
Rapid extraction fundamental wave reactive power therein, fundamental wave imbalance and each harmonic composition, intelligent controller, control are adjusted in the quality of power supply
The first switching controlling 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) enter Mobile state switching, realize the rough compensation of reactive power and out-of-balance current.
4. increase in capacitor compensation unit (Fig. 3 and Fig. 4) side one group of second current transformer group (Lha in Fig. 2~
C), for monitoring the compensation electric current of capacitor cell.The quality of power supply 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 can not meet out-of-balance current and idle compensation requirement, quality of power supply regulation intelligence
The IGBT compensation control output circuit of controller exports suitable PWM switching signals and gives IGBT compensation circuits, and inversion goes 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, power network current is adjusted in the state of power network three-phase current unbalance caused by unbalanced load
The poised state for 100A is saved, wherein A phase loads electricity consumption is 52A, if power network is adjusted to 100A so phase current offsets
Can remaining 48A, similarly C phase currents offset lack 48A, it is a kind of active to be filled with the regulation of passive combination power load three-phase imbalance
C phases can be transferred to by the drift current 48A of A phases by putting, in the case of reaching the imbalance electricity consumption of proof load side, the three-phase of power network
Current balance type.
7. when capacitor compensation unit can not meet the compensation requirement of reactive voltage, quality of power supply regulation intelligent controller
IGBT compensation control output circuit (Fig. 5 IGBT drivings) output of the central processing unit control of (Fig. 5 controller) is suitable
Pwm switching signal gives IGBT modules, and inversion goes out the fundamental voltage of three-phase amplitude and phase-adjustable, realizes the fine of reactive voltage
Compensation, generally 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 feed back to central processing unit, offset voltage can
Handled with being acquired by second voltage Acquisition Circuit to central processing unit, quality of power supply regulation intelligent controller be (Fig. 6's
Controller) central processing unit obtain information of voltage data after compensation point information of voltage is analyzed and processed at once, with judge
Whether compensation point voltage exceedes setting value, when voltage is less than setting lower limit (Umin) value, quality of power supply regulation intelligent controller
Central processing unit control IGBT compensation circuits (Fig. 6 IGBT drivings) output capacity current, booster tension, when voltage is higher than
When setting the upper limit (Umax) value, voltage is reduced, is run so as to realize that each phase voltage is stable in normal range (NR).
It is 9. as shown in Figure 7.The three-phase current waveform of collection 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, quality of power supply regulation 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 fractional harmonic function of current caused by suppression load.
10. main-process stream is as shown in Figure 9.
Certainly, better embodiment of the present invention is these are only, the use range of the present invention is not limited with this, therefore, it is every
Equivalent change is made in the principle of the invention to should be included in the protection domain of invention.
Claims (9)
- A kind of 1. active and passive combination power load three-phase imbalance adjusting means, it is characterised in that：Including AC network, non- Linear load, capacitance compensation point mend circuit, capacitance compensation mends circuit altogether, the regulation of IGBT compensation circuits, protection circuit, the quality of power supply 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 network, quality of power supply regulation intelligent controller control connection capacitance compensation point benefit circuit, capacitance compensation to mend altogether respectively Circuit, IGBT compensation circuits, circuit, IGBT compensation circuits are being mended altogether with exchanging positioned at capacitance compensation point benefit circuit, capacitance compensation Fuse protecting device is correspondingly arranged between power network respectively.
- 2. one kind according to claim 1 is active with passive combination power load three-phase imbalance adjusting means, its feature It is：Above-mentioned quality of power supply regulation 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 fill with analog quantity acquisition circuit, control output circuit, display Put, fundamental wave reactive power detection circuit electrical connection.
- 3. one kind according to claim 2 is active with passive combination power load three-phase imbalance adjusting means, its feature It is：The analog quantity acquisition circuit of the quality of power supply regulation 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 sensing AC network electric current are mutual Sensor group electrically connects, and the second electric current electrically connects with for the second current transformer group of inductance capacitance compensation side electric current, the first electricity Pressure Acquisition Circuit electrically connects with AC network.
- 4. one kind according to claim 3 is active with passive combination power load three-phase imbalance adjusting means, its feature It is：The control output circuit of the quality of power supply regulation intelligent controller includes：Capacitive coupling control output circuit, split-phase electricity Hold control output circuit, IGBT compensation control output circuits, 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 adjusting means, its feature It is：Mend circuit positioned at capacitance compensation point, capacitance compensation is mended the is set between circuit, IGBT compensation circuits and AC network altogether One reactance protector group, the second reactance protector group, the 3rd reactance protector group.
- 6. one kind according to claim 5 is active with passive combination power load three-phase imbalance adjusting means, its feature It is：4th reactance protector group is being set between the 3rd reactance protector group and IGBT compensation circuits, positioned at the 3rd Controlling switch group is set 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 adjusting means, its feature It is：In two tip nodes positioned at above-mentioned controlling switch group and connect protective resistance.
- 8. one kind according to claim 6 is active with passive combination power load three-phase imbalance adjusting means, its feature It is：Capacitive coupling control output circuit, split-phase capacitor control output circuit control capacitance compensation point to mend circuit, electric capacity benefit respectively Repay the first switching controlling switch, the second switching controlling switch of common benefit circuit.
- 9. one kind according to claim 6 is active with passive combination power load three-phase imbalance adjusting means, its feature It is：AC network includes A phases power supply, B phases power supply, C phases power supply, N lines, sets the 5th reactance to protect between N lines and IGBT circuits Shield group.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711159202.0A CN107769230A (en) | 2017-11-20 | 2017-11-20 | A kind of active and passive combination power load three-phase imbalance adjusting means |
Applications Claiming Priority (1)
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| CN108233395A (en) * | 2018-03-07 | 2018-06-29 | 江苏莱宝电力股份有限公司 | It mixes reactive power compensator and mixes the control method of reactive power compensator |
| CN108448598A (en) * | 2018-03-29 | 2018-08-24 | 山西中州电气有限公司 | Hybrid electric energy comprehensive treatment device |
| CN108521134A (en) * | 2018-04-25 | 2018-09-11 | 泉州维盾电气有限公司 | Three-phase load dynamic balance adjusting device |
| CN109066712A (en) * | 2018-08-09 | 2018-12-21 | 海南金盘智能科技股份有限公司 | A kind of individual-phase control method and system of the parallel three level SVG of three-phase and four-line |
| CN109103906A (en) * | 2018-09-11 | 2018-12-28 | 许继电源有限公司 | A kind of three-phase power distribution system and three-phase imbalance compensation device |
| CN109980661A (en) * | 2019-03-07 | 2019-07-05 | 武汉武新电气科技股份有限公司 | A kind of load unbalanced automatic regulating system of three-phase comprehensive of bimodulus communication |
| CN110007159A (en) * | 2019-04-15 | 2019-07-12 | 国网山东省电力公司德州市陵城区供电公司 | A kind of distribution transformer load three-phase imbalance measuring instrument and its application method |
| CN110212556A (en) * | 2019-03-20 | 2019-09-06 | 浙江工业大学 | Three-phase imbalance and idle improvement automatic switching device and method |
| CN112636371A (en) * | 2020-12-08 | 2021-04-09 | 广东正诚电气科技有限公司 | Mixed type power load three-phase unbalance adjusting system |
| CN113922387A (en) * | 2021-10-14 | 2022-01-11 | 贵州电网有限责任公司 | Based on portable reactive power compensator in modularization low-voltage transformer district |
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| CN108233395A (en) * | 2018-03-07 | 2018-06-29 | 江苏莱宝电力股份有限公司 | It mixes reactive power compensator and mixes the control method of reactive power compensator |
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| CN109066712B (en) * | 2018-08-09 | 2021-12-31 | 海南金盘智能科技股份有限公司 | Phase splitting control method and system for three-phase four-wire parallel type three-level SVG |
| CN109066712A (en) * | 2018-08-09 | 2018-12-21 | 海南金盘智能科技股份有限公司 | A kind of individual-phase control method and system of the parallel three level SVG of three-phase and four-line |
| CN109103906A (en) * | 2018-09-11 | 2018-12-28 | 许继电源有限公司 | A kind of three-phase power distribution system and three-phase imbalance compensation device |
| CN109980661A (en) * | 2019-03-07 | 2019-07-05 | 武汉武新电气科技股份有限公司 | A kind of load unbalanced automatic regulating system of three-phase comprehensive of bimodulus communication |
| CN109980661B (en) * | 2019-03-07 | 2023-01-17 | 武汉武新电气科技股份有限公司 | Three-phase comprehensive unbalanced load automatic regulating system of bimodulus communication |
| CN110212556A (en) * | 2019-03-20 | 2019-09-06 | 浙江工业大学 | Three-phase imbalance and idle improvement automatic switching device and method |
| CN110007159A (en) * | 2019-04-15 | 2019-07-12 | 国网山东省电力公司德州市陵城区供电公司 | A kind of distribution transformer load three-phase imbalance measuring instrument and its application method |
| CN112636371A (en) * | 2020-12-08 | 2021-04-09 | 广东正诚电气科技有限公司 | Mixed type power load three-phase unbalance adjusting system |
| CN113922387A (en) * | 2021-10-14 | 2022-01-11 | 贵州电网有限责任公司 | Based on portable reactive power compensator in modularization low-voltage transformer district |
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