CN105162334B - For balancing the movable type adjusting device of three-phase load and its method of adjustment - Google Patents
For balancing the movable type adjusting device of three-phase load and its method of adjustment Download PDFInfo
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- CN105162334B CN105162334B CN201510612182.2A CN201510612182A CN105162334B CN 105162334 B CN105162334 B CN 105162334B CN 201510612182 A CN201510612182 A CN 201510612182A CN 105162334 B CN105162334 B CN 105162334B
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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
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- 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 present invention discloses a kind of movable type adjusting device and its method of adjustment for being used to balance three-phase load, which includes single phase rectifier circuit, single-phase full bridge inverter circuit, filter circuit and the first capacitance；Single phase rectifier circuit, single-phase full bridge inverter circuit and the first capacitance are electrically connected in parallel；Single phase rectifier circuit includes the first rectifier diode, the second rectifier diode, third rectifier diode and the 4th rectifier diode；Single-phase full bridge inverter circuit includes the first IGBT switches, the 2nd IGBT switches, the 3rd IGBT switches and the 4th IGBT switches；Filter circuit includes inductance and the second capacitance；One end of inductance is electrically connected with the 5th node, and the positive plate of the other end of inductance respectively with first lead-out terminal and the second capacitance is electrically connected；The negative plate of second capacitance is electrically connected respectively with the 6th node and second output terminal.The movable type adjusting device can avoid the interruption to customer power supply, and can greatly save equipment investment.
Description
Technical field
The present invention relates to the adjustment technology fields of three-phrase burden balance.It is born more particularly, to one kind for balancing three-phase
The movable type adjusting device and its method of adjustment of lotus.
Background technology
It in power distribution network, often will appear the situation of three-phase load unbalance, cause fever, the overload of power supply unit, influence
The power supply of user can also cause power-off fault when serious.
In the prior art, adjusting a kind of method of three-phrase burden balance is, is connect in power distribution station by changing each phase load
Line readjusts the distribution of each phase load.But this method can cause the interruption of customer power supply, and loss is brought to user.
In the prior art, adjusting another method of three-phrase burden balance is, utilizes SVG (Static Var
Generator- static reactive generators) or special power electronic equipment, by controlling the energy exchange between each phase load,
Partial Power in one phase of load weight is transferred to the light phase of load up.This kind of method can avoid that user is caused to break
Electricity, and can accomplish electrodeless adjustment.But this method needs to be equipped with a power-balance adjustment dress to each power distribution station
It puts, investment is huge, and most temporal power balance adjusting devices do not work, i.e. the utilization of power-balance adjusting apparatus
Rate is low, and so as to cause the waste of equipment, cost performance is very low.
Accordingly, it is desirable to provide it is a kind of for balancing the movable type adjusting device and its method of adjustment of three-phase load, to overcome
The disadvantages mentioned above of the prior art.
Invention content
It is an object of the present invention to provide a kind of for balancing the movable type adjusting device of three-phase load.
It is another object of the present invention to provide a kind of for balancing the method for adjustment of three-phase load.
To reach above-mentioned first purpose, the present invention uses following technical proposals：
For balancing the movable type adjusting device of three-phase load, which includes single phase rectifier circuit, list
Phase full bridge inverter, filter circuit and the first capacitance；
Single phase rectifier circuit, single-phase full bridge inverter circuit and the first capacitance are electrically connected in parallel；
It is whole that single phase rectifier circuit includes the first rectifier diode, the second rectifier diode, third rectifier diode and the 4th
Flow diode；The anode of first rectifier diode is electrically connected with the cathode of the second rectifier diode, and node therebetween is
First node；The anode of third rectifier diode is electrically connected with the cathode of the 4th rectifier diode, and node therebetween is
Second node；The cathode of first rectifier diode is electrically connected with the cathode of third rectifier diode, and node therebetween is
Third node；The anode of second rectifier diode is electrically connected with the anode of the 4th rectifier diode, and node therebetween is
Fourth node；Single phase rectifier circuit is used for conducting and the second rectification two by the first rectifier diode and the 4th rectifier diode
The alternate mode of conducting of pole pipe and third rectifier diode is by the ac voltage rectifier of input single-phase rectification circuit into direct current
Pressure, to provide steady dc voltage to single-phase full bridge inverter circuit；
First node is electrically connected with first input end；And second node is electrically connected with the second input terminal；
Single-phase full bridge inverter circuit includes the first IGBT switches, the 2nd IGBT switches, the 3rd IGBT switches and the 4th IGBT
Switch；The emitter of first IGBT switches is electrically connected with the 2nd IGBT collectors switched, and node therebetween is the 5th
Node；The emitter of 3rd IGBT switches is electrically connected with the 4th IGBT collectors switched, and node therebetween is the 6th
Node；The collector of first IGBT switches is electrically connected with the 3rd IGBT collectors switched, and node therebetween is the 7th
Node；The emitter of 2nd IGBT switches is electrically connected with the 4th IGBT emitters switched, and node therebetween is the 8th
Node；It is frequency and the adjustable alternating voltage of amplitude, and pass through frequency that single-phase full bridge inverter circuit, which is used for DC voltage inversion,
The adjustment of rate and amplitude realizes that the output voltage of single-phase full bridge inverter circuit is synchronous with phase load any one in three-phase load；
Filter circuit includes inductance and the second capacitance；One end of inductance is electrically connected with the 5th node, the other end point of inductance
Positive plate not with first lead-out terminal and the second capacitance is electrically connected；The negative plate of second capacitance respectively with the 6th node and second
Leading-out terminal is electrically connected；Filter circuit is used to be filtered the output voltage of single-phase full bridge inverter circuit；
The positive plate of first capacitance is electrically connected respectively with third node and the 7th node；The negative plate of first capacitance respectively with
Fourth node and the electrical connection of the 8th node；First capacitance is used for the DC voltage filtering of fluctuation that exports single phase rectifier circuit
Steady dc voltage, and filtered steady dc voltage is exported to single-phase full bridge inverter circuit.
Preferably, the movable type adjusting device further includes the base stage switched respectively with the first IGBT, described second
The control electricity of the base stage electrical connection of the base stage of IGBT switches, the base stage of the 3rd IGBT switches and the 4th IGBT switches
Road, for generating corresponding pwm pulse according to the operational order of commutation and sending it to the single-phase full bridge inverter circuit
Each IGBT switches, to control each IGBT switch motion of the single-phase full bridge inverter circuit.
Preferably, the first input end, second input terminal, the first lead-out terminal and described second defeated
It is all quick connection terminal to go out terminal.
To reach above-mentioned second purpose, the present invention uses following technical proposals：
For balancing the method for adjustment of three-phase load, which uses the movable type adjusting device, the adjustment
Method includes the following steps：
By the first input end of the movable type adjusting device and the second input terminal respectively with arbitrary two in power grid
Phase load is electrically connected；
When the first capacitance exports filtered steady dc voltage to single-phase full bridge inverter circuit, adjustment first is defeated
Go out the output voltage between terminal and second output terminal, make its frequency, phase and amplitude successively respectively with remove phase voltage
Frequency, phase and amplitude it is consistent；
The first lead-out terminal of the movable type adjusting device and second output terminal are electrically connected to load to be transferred
Feeder ear so that power grid and the movable type adjusting device are powered simultaneously to load to be transferred；
Disconnect the connection of load and power grid to be transferred so that the movable type adjusting device is individually supplied to load to be transferred
Electricity；
The slowly output voltage between adjustment first lead-out terminal and second output terminal, makes its frequency, phase and amplitude
Frequency, the phase and amplitude of the voltage with moving into phase are consistent respectively successively；
The first lead-out terminal of the movable type adjusting device and second output terminal and load to be transferred are all electrically connected
It is connected to and moves into phase so that power grid and the movable type adjusting device are powered simultaneously to load to be transferred；
Disconnect being electrically connected for the movable type adjusting device and the feeder ear of load to be transferred so that load to be transferred is by electricity
Net individually power supply.
Beneficial effects of the present invention are as follows：
(1) compared with the adjusting apparatus of the prior art and method of adjustment, the movable type adjusting device of the invention includes
Single-phase full bridge inverter circuit, and the output voltage of single-phase full bridge inverter circuit is adjustable so that adjustment handoff procedure is smooth, avoids producing
Raw impact, so as to avoid the interruption to customer power supply；
(2) compared with the adjusting apparatus of the prior art and method of adjustment, the movable type adjusting device of the invention is realized
After one power distribution station three-phrase burden balance adjustment, it can remove and be used for another power distribution station, it is each so as to avoid
A power distribution station is all equipped with an adjusting apparatus, and equipment investment is greatly saved.
Description of the drawings
The specific embodiment of the present invention is described in further detail below in conjunction with the accompanying drawings.
Fig. 1 is the circuit structure diagram of the movable type adjusting device provided in an embodiment of the present invention for being used to balance three-phase load.
Fig. 2 is the flow chart for being used to balance the method for adjustment of three-phase load that inventive embodiments provide.
Specific embodiment
In order to illustrate more clearly of the present invention, the present invention is done further with reference to preferred embodiments and drawings
It is bright.Similar component is indicated with identical reference numeral in attached drawing.It will be appreciated by those skilled in the art that institute is specific below
The content of description is illustrative and be not restrictive, and should not be limited the scope of the invention with this.
As shown in Figure 1, provided in this embodiment include single-phase rectifier for balancing the movable type adjusting device of three-phase load
Circuit 1, single-phase full bridge inverter circuit 2,3 and first capacitance C of filter circuitd.Single phase rectifier circuit 1, single-phase full bridge inverter circuit 2
With the first capacitance CdIt is electrically connected in parallel.
Single phase rectifier circuit 1 includes the first rectifier diode VD1, the second rectifier diode VD2, third rectifier diode
VD3 and the 4th rectifier diode VD4.The anode of first rectifier diode VD1 and the cathode of the second rectifier diode VD2 are electrically connected
It connects, and the node J1 between the first rectifier diode VD1 and the second rectifier diode VD2 is first node；Two pole of third rectification
The anode of pipe VD3 is electrically connected with the cathode of the 4th rectifier diode VD4, and two pole of third rectifier diode VD3 and the 4th rectification
Node J2 between pipe VD4 is second node；The cathode of first rectifier diode VD1 and the cathode of third rectifier diode VD3
Electrical connection, and the node J3 between the first rectifier diode VD1 and third rectifier diode VD3 is third node；Second rectification
The anode of diode VD2 is electrically connected with the anode of the 4th rectifier diode VD4, and the second rectifier diode VD2 and the 4th rectification
Node J4 between diode VD4 is fourth node.Single phase rectifier circuit 1 is used for through the first rectifier diode VD1 and the 4th
The conducting of rectifier diode VD4 and the alternate mode of conducting of the second rectifier diode VD2 and third rectifier diode VD3 will be defeated
Enter the ac voltage rectifier of single phase rectifier circuit 1 into DC voltage, single-phase full bridge inverter circuit 2 to be given to provide stable DC
Pressure.
First node J1 and first input end VIN1Electrical connection；And second node J2 and the second input terminal VIN2It is electrically connected
It connects.
Single-phase full bridge inverter circuit 2 includes the first IGBT (Insulated Gate Bipolar Transistor, insulation
Grid bipolar transistor) switch VT1, the 2nd IGBT switch VT2, the 3rd IGBT switch VT3 and the 4th IGBT switches VT4.First
The emitter of IGBT switches VT1 is electrically connected with the collector of the 2nd IGBT switches VT2, and the first IGBT switches VT1 and second
Node J5 between IGBT switches VT2 is the 5th node；The emitter and the 4th IGBT of 3rd IGBT switches VT3 switchs VT4's
Collector is electrically connected, and the node J6 between the 3rd IGBT switch VT3 and the 4th IGBT switches VT4 is the 6th node；First
The collector of IGBT switches VT1 is electrically connected with the collector of the 3rd IGBT switches VT3, and the first IGBT switch VT1 and third
Node J7 between IGBT switches VT3 is the 7th node；The emitter and the 4th IGBT of 2nd IGBT switches VT2 switchs VT4's
Emitter is electrically connected, and the node J8 between the 2nd IGBT switch VT2 and the 4th IGBT switches VT4 is the 8th node.It is single-phase complete
It is frequency and the adjustable alternating voltage of amplitude, and pass through frequency and amplitude that bridge inverter circuit 2, which is used for DC voltage inversion,
Adjustment realizes that the output voltage of single-phase full bridge inverter circuit 2 is synchronous with phase load any one in three-phase load.
In a kind of preferred embodiment of the present embodiment, the movable type adjusting device further includes control circuit (in figure
It is not shown), and the control circuit switchs base stage, the third of VT2 with the base stage of the first IGBT switches VT1, the 2nd IGBT respectively
The base stage of IGBT switches VT3 and the base stage electrical connection of the 4th IGBT switches VT4.Control circuit is used for according to commutation from the user
Instruction generates corresponding PWM (Pulse-Width Modulation, pulsewidth modulation) pulses and to send it to single-phase full bridge inverse
Become each IGBT switches of circuit 2, to control each IGBT switch motion of single-phase full bridge inverter circuit 2.
Filter circuit 3 includes inductance LfWith the second capacitance Cf.Inductance LfOne end be electrically connected with the 5th node J5, inductance Lf
The other end respectively with first lead-out terminal VOUT1With the second capacitance CfPositive plate electrical connection.Second capacitance CfNegative plate point
Not with the 6th node J6 and the sub- V of second output terminalOUT2Electrical connection.Filter circuit 3 is for the output to single-phase full bridge inverter circuit 2
Voltage is filtered.
First capacitance CdPositive plate be electrically connected respectively with third node J3 and the 7th node J7；First capacitance CdCathode
Plate is electrically connected respectively with fourth node J4 and the 8th node J8.First capacitance CdFor the fluctuation for exporting single phase rectifier circuit 1
DC voltage filtering for steady dc voltage, and filtered steady dc voltage is exported and gives single-phase full bridge inversion
Circuit 2.
In a kind of preferred embodiment of the present embodiment, first input end VIN1, the second input terminal VIN2, it is first defeated
Go out terminal VOUT1With the sub- V of second output terminalOUT2All it is quick connection terminal.
It is provided in this embodiment to use above-mentioned movable type adjusting device for balancing the method for adjustment of three-phase load.In power grid
The phase for removing load to be transferred is needed to be defined as removing phase；The phase for moving into load to be transferred is needed to be defined as moving into power grid
Phase.The method of adjustment includes the following steps：
S1：By the first input end V of the movable type adjusting deviceIN1With the second input terminal VIN2Respectively in power grid
Arbitrary two phase load electrical connection；
S2：As the first capacitance CdWhen filtered steady dc voltage is exported to single-phase full bridge inverter circuit 2, adjustment
First lead-out terminal VOUT1With the sub- V of second output terminalOUT2Between output voltage, make its frequency, phase and amplitude successively respectively with
Frequency, the phase and amplitude for removing the voltage of phase are consistent；
S3：By the first lead-out terminal V of the movable type adjusting deviceOUT1With the sub- V of second output terminalOUT2It is electrically connected to and treats
The feeder ear of transfer load so that power grid and the movable type adjusting device are powered simultaneously to load to be transferred；
S4：Disconnect the connection of load and power grid to be transferred so that the movable type adjusting device individually gives load to be transferred
Power supply；Due to first lead-out terminal VOUT1With the sub- V of second output terminalOUT2Between the frequency of output voltage, phase and amplitude successively
Frequency, the phase and amplitude of the voltage with removing phase are consistent respectively, therefore the connection of load and power grid to be transferred is disconnected in the step
Shi Buhui causes any impact；
S5：Slowly adjustment first lead-out terminal VOUT1With the sub- V of second output terminalOUT2Between output voltage, make its frequency,
Frequency, the phase and amplitude of the voltage with moving into phase are consistent respectively successively for phase and amplitude；Since the adjustment process of the step is
It slowly completes, therefore impact will not be brought；
S6：By the first lead-out terminal V of the movable type adjusting deviceOUT1With the sub- V of second output terminalOUT2It is and to be transferred
Load is all electronically connected to move into phase so that power grid and the movable type adjusting device are powered simultaneously to load to be transferred；
S7：Disconnect being electrically connected for the movable type adjusting device and the feeder ear of load to be transferred so that load to be transferred
It is individually powered by power grid.
The movable type adjusting device can be removed after above-mentioned steps S6, it is every so as to avoid to reuse
One power distribution station is equipped with an adjusting apparatus.
Since the output voltage of single-phase full bridge inverter circuit 2 can be adjusted, punching will not be generated by being movable into and out operation
It hits, and intermediate phase adjustment process is also slowly smooth completion, therefore whole process load will not power off, and not have impact.
Obviously, the above embodiment of the present invention be only to clearly illustrate example of the present invention, and not be pair
The restriction of embodiments of the present invention for those of ordinary skill in the art, may be used also on the basis of the above description
To make other variations or changes in different ways, all embodiments can not be exhaustive here, it is every to belong to this hair
The obvious changes or variations that bright technical solution is extended out are still in the row of protection scope of the present invention.
Claims (2)
1. for balancing the movable type adjusting device of three-phase load, which is characterized in that the movable type adjusting device includes single-phase whole
Current circuit, single-phase full bridge inverter circuit, filter circuit and the first capacitance；
Single phase rectifier circuit, single-phase full bridge inverter circuit and the first capacitance are electrically connected in parallel；
Single phase rectifier circuit includes the first rectifier diode, the second rectifier diode, third rectifier diode and the 4th rectification two
Pole pipe；The anode of first rectifier diode is electrically connected with the cathode of the second rectifier diode, and node therebetween is first
Node；The anode of third rectifier diode is electrically connected with the cathode of the 4th rectifier diode, and node therebetween is second
Node；The cathode of first rectifier diode is electrically connected with the cathode of third rectifier diode, and node therebetween is third
Node；The anode of second rectifier diode is electrically connected with the anode of the 4th rectifier diode, and node therebetween is the 4th
Node；Single phase rectifier circuit is used for conducting and the second rectifier diode by the first rectifier diode and the 4th rectifier diode
With the alternate mode of conducting of third rectifier diode by the ac voltage rectifier of input single-phase rectification circuit into DC voltage, with
Steady dc voltage is provided to single-phase full bridge inverter circuit；
First node is electrically connected with first input end；And second node is electrically connected with the second input terminal；
Single-phase full bridge inverter circuit includes the first IGBT switches, the 2nd IGBT switches, the 3rd IGBT switches and the 4th IGBT switches；
The emitter of first IGBT switches is electrically connected with the 2nd IGBT collectors switched, and node therebetween is the 5th node；
The emitter of 3rd IGBT switches is electrically connected with the 4th IGBT collectors switched, and node therebetween is the 6th node；
The collector of first IGBT switches is electrically connected with the 3rd IGBT collectors switched, and node therebetween is the 7th node；
The emitter of 2nd IGBT switches is electrically connected with the 4th IGBT emitters switched, and node therebetween is the 8th node；
It is frequency and the adjustable alternating voltage of amplitude, and pass through frequency and width that single-phase full bridge inverter circuit, which is used for DC voltage inversion,
The adjustment of value realizes that the output voltage of single-phase full bridge inverter circuit is synchronous with phase load any one in three-phase load；
Filter circuit includes inductance and the second capacitance；One end of inductance is electrically connected with the 5th node, the other end of inductance respectively with
The positive plate of first lead-out terminal and the second capacitance is electrically connected；The negative plate of second capacitance exports respectively with the 6th node and second
Terminal is electrically connected；Filter circuit is used to be filtered the output voltage of single-phase full bridge inverter circuit；
The positive plate of first capacitance is electrically connected respectively with third node and the 7th node；The negative plate of first capacitance is respectively with the 4th
Node and the electrical connection of the 8th node；First capacitance is used for the DC voltage filtering of fluctuation for exporting single phase rectifier circuit to stablize
DC voltage, and filtered steady dc voltage is exported to single-phase full bridge inverter circuit；
Its set-up procedure includes：
The first input end of the movable type adjusting device and the second input terminal are born respectively with the arbitrary two-phase in power grid
Charged connection；
When the first capacitance exports filtered steady dc voltage to single-phase full bridge inverter circuit, the first output terminal is adjusted
Son and second output terminal between output voltage, make its frequency, phase and amplitude successively respectively with remove phase voltage frequency
Rate, phase and amplitude are consistent；
The first lead-out terminal of the movable type adjusting device and second output terminal are electrically connected to the power supply of load to be transferred
End so that power grid and the movable type adjusting device are powered simultaneously to load to be transferred；
Disconnect the connection of load and power grid to be transferred so that the movable type adjusting device is individually powered to load to be transferred；
The slowly output voltage between adjustment first lead-out terminal and second output terminal, makes its frequency, phase and amplitude successively
Frequency, the phase and amplitude of the voltage with moving into phase are consistent respectively；
The first lead-out terminal of the movable type adjusting device and second output terminal and load to be transferred are all electronically connected to
It moves into phase so that power grid and the movable type adjusting device are powered simultaneously to load to be transferred；
Disconnect being electrically connected for the movable type adjusting device and the feeder ear of load to be transferred so that load to be transferred is by power grid list
Solely power supply；
The movable type adjusting device further includes the base stage switched respectively with the first IGBT, the base of the 2nd IGBT switches
The control circuit of the base stage electrical connection of pole, the base stage of the 3rd IGBT switches and the 4th IGBT switches, is changed for basis
The operational order of phase generates corresponding pwm pulse and sends it to each IGBT switches of the single-phase full bridge inverter circuit,
To control each IGBT switch motion of the single-phase full bridge inverter circuit；
After the movable type adjusting device realizes a power distribution station three-phrase burden balance adjustment, it can move and match for another
Power station uses.
2. the movable type adjusting device according to claim 1 for being used to balance three-phase load, which is characterized in that described first
Input terminal, second input terminal, the first lead-out terminal and second output terminal are all quick connection terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510612182.2A CN105162334B (en) | 2015-09-23 | 2015-09-23 | For balancing the movable type adjusting device of three-phase load and its method of adjustment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510612182.2A CN105162334B (en) | 2015-09-23 | 2015-09-23 | For balancing the movable type adjusting device of three-phase load and its method of adjustment |
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| Publication Number | Publication Date |
|---|---|
| CN105162334A CN105162334A (en) | 2015-12-16 |
| CN105162334B true CN105162334B (en) | 2018-06-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510612182.2A Expired - Fee Related CN105162334B (en) | 2015-09-23 | 2015-09-23 | For balancing the movable type adjusting device of three-phase load and its method of adjustment |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106452101A (en) * | 2016-08-23 | 2017-02-22 | 重庆大学 | Electronic voltage regulator |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1426150A (en) * | 2001-06-01 | 2003-06-25 | Abb瑞士有限公司 | Converter circuit |
| CN101860036A (en) * | 2010-05-07 | 2010-10-13 | 江苏省电力公司连云港供电公司 | Novel zero-sequence current compensator |
| CN103001217A (en) * | 2012-11-23 | 2013-03-27 | 山东电力集团公司 | Rapid distribution network load transfer method based on load balance |
| CN103915852A (en) * | 2014-04-08 | 2014-07-09 | 中国计量学院 | Flexible switching system based on single-phase grid-connected inverter and switching method thereof |
-
2015
- 2015-09-23 CN CN201510612182.2A patent/CN105162334B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1426150A (en) * | 2001-06-01 | 2003-06-25 | Abb瑞士有限公司 | Converter circuit |
| CN101860036A (en) * | 2010-05-07 | 2010-10-13 | 江苏省电力公司连云港供电公司 | Novel zero-sequence current compensator |
| CN103001217A (en) * | 2012-11-23 | 2013-03-27 | 山东电力集团公司 | Rapid distribution network load transfer method based on load balance |
| CN103915852A (en) * | 2014-04-08 | 2014-07-09 | 中国计量学院 | Flexible switching system based on single-phase grid-connected inverter and switching method thereof |
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| CN105162334A (en) | 2015-12-16 |
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