CN109842134A - A kind of commutation device, system and method - Google Patents
A kind of commutation device, system and method Download PDFInfo
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Abstract
The invention discloses a kind of commutation device, system and method, device includes controller and phase shift commutation circuit；Input terminal of the input terminal of the phase shift commutation circuit as commutation device；The output end of the phase shift commutation circuit is in parallel, the output end as commutation device；The phase shift commutation circuit includes the first switch being sequentially connected in series and phasing unit, and the phasing unit is used to carry out phase shift to the phase shift commutation circuit；The controller is connect with the phasing unit signal, carries out phase shift to the phase shift commutation circuit for controlling the phasing unit；The controller is connect with the first switch signal, for controlling the on-off of the first switch.Power interruptions are not present when with commutation, it can be achieved that seamless commutation, when commutation can be provided for load steadily, the electric energy of high quality, the advantages that stability is good, and safety is good.
Description
Technical field
The present invention relates to multiphase power supply technique field more particularly to a kind of commutation devices, system and method.
Background technique
China's low-voltage network largely uses three-phase four-wire power supply, i.e., power distribution network is after 10/0.4kV transformer pressure-reducing
It is powered in the form of three-phase four-wire system to numerous residents.Distribution line load three-phase equilibrium be electric power netting safe running, saving energy and decreasing loss,
The basic guarantee factor for preventing the person from getting an electric shock, and the electrical appliance of resident is generally single-phase load, therefore power supply company Jiang Ju
Burden on the people lotus can uniformly connect single-phase load on A, B, C three-phase when tapping into power grid, so as to realize three-phase load in power supply line
Balance.And with the variation of time, resident's household electrical appliance can be increasing, the wiring of power supply company when increasing load access power grid newly
Carelessness causes power load distributing uneven, and the variation of economic activity causes the load respectively mutually undertaken on route constantly to change and use
Factors can all make low-voltage distributing line generate three-phase load unbalance the phenomenon that such as the period is inconsistent of electricity.If load three-phase is not
The degree of balance is very serious, and the duration is long, can generate many adverse effects to power grid and its equipment, have than more typical situation
The electric energy loss of distribution transformer and transmission line of electricity increases, and the power output of distribution transformer reduces, low-voltage leakage device operate normally by
To influence.
Although it is existing intelligence commutation device can automatically realize load automatic switch to the highest phase of voltage, it is existing
It is that commutation is directly realized by the control of the on-off that opens in technology, as shown in Figure 1, electric current is big when therefore still having commutation,
There may be arcing, there are the short interruptions of electric energy when may damage commutation equipment or load equipment and commutation, not flat enough
It is suitable, the problems such as power quality when commutation is not high.
Number of patent application is 201721295105.X, the utility model of entitled " a kind of three-phase intelligent phase-change switch device "
Patent is the background technique of the application.
Summary of the invention
The technical problem to be solved in the present invention is that, for technical problem of the existing technology, the present invention provides one
Power interruptions are not present when kind of commutation, it can be achieved that seamless commutation, when commutation can be provided for load steadily, the electric energy of high quality,
Stability is good, the good commutation device of safety, system and method.
In order to solve the above technical problems, technical solution proposed by the present invention are as follows: a kind of commutation device: including controller and shifting
Phase commutation circuit；Input terminal of the input terminal of the phase shift commutation circuit as commutation device；The phase shift commutation circuit it is defeated
Outlet is in parallel, the output end as commutation device；
The phase shift commutation circuit includes the first switch being sequentially connected in series and phasing unit, and the phasing unit is used for
Phase shift is carried out to the phase shift commutation circuit；
The controller is connect with the phasing unit signal, is changed for controlling the phasing unit the phase shift
Circuitry phase carries out phase shift；
The controller is connect with the first switch signal, for controlling the on-off of the first switch.
Further, the phase shift commutation circuit further includes by-pass switch, the by-pass switch with by the first switch
With the circuit in parallel after phasing unit series connection；
The controller is also connect with the by-pass switch signal, for controlling the on-off of the by-pass switch.
Further, the phase shift commutation circuit further includes breaker, and the breaker is connected on the commutation device
Between input terminal and the input terminal of the by-pass switch.
Further, the controller further includes voltage sampling unit；The voltage sampling unit and the phase shift commutation
The input terminal of circuit connects, the voltage signal of the input terminal for acquiring the phase shift commutation circuit.
Further, the controller further includes Network Interface Module, is used for the controller and external network communication.
It further, further include determining phase commutation circuit, the input terminal for determining phase commutation circuit is as the defeated of commutation device
Enter end, the output end for determining phase commutation circuit is in parallel with the output end of the phase shift commutation circuit；It is described to determine phase commutation circuit
Including the second switch being connected between input terminal and output end；
The controller is also connect with the second switch signal, for controlling the on-off of the second switch.
It further, further include memory in the controller, for storing preset original phase value.
A kind of commutation system, including commutation server and commutation device as described above；The commutation server and described
It is connected to the network between commutation device；
The commutation server is used for the degree of unbalancedness of monitoring power-supply networks, and controls the commutation device and carry out commutation；
The commutation device is for carrying out commutation under the control of the commutation server.
A kind of phase change method, commutation device include: by the process of former phase commutation to target phase
S1. when the target is conducted, the phase of the former phase is adjusted by the phasing unit of the former phase, and/or
The phase of the target phase is adjusted by the phasing unit of the target phase；So that the phase and the target of the original phase
The phase of phase is identical, by the former phase and the target mutually common power supply；
S2. the former phase is disconnected, by the target mutually individually power supply.
It further, further include step S3 after the step S2: the phase recovery of the target phase is original to its
Phase bypasses the phasing unit of the target phase.
Further, include: mutually to be sampled to the original in step S1, determine the phase value of the former phase；To described
Target is mutually sampled, and determines the phase value of the target phase；
Phase shift angle is determined according to the phase value of the phase value of the former phase and the target phase；
The phase shift angle, or the phase tune by the target phase are individually adjusted by the phasing unit of the former phase
Whole unit individually adjusts the phase shift angle, or passes through the former phasing unit of phase and the phase tune of the target phase
Whole unit adjusts the phase shift angle jointly, so that the phase of the original phase is identical with the phase of the target phase.
Further, in step S1, according to the preset of the preset original phase value of the former phase and the target phase
Original phase value determines phase shift angle；
The phase shift angle, or the phase tune by the target phase are individually adjusted by the phasing unit of the former phase
Whole unit individually adjusts the phase shift angle, or passes through the former phasing unit of phase and the phase tune of the target phase
Whole unit adjusts the phase shift angle jointly, so that the phase of the original phase is identical with the phase of the target phase.
Compared with the prior art, the advantages of the present invention are as follows:
1, of the invention by setting phase shift commutation circuit, it may make the former phase and target phase when commutation by phase shift commutation circuit
Phase is consistent, so as to by it is former mutually identical with target when for load supplying, after target is mutually stable, then disconnect former relative load
Power supply, thereby may be ensured that the power supply for not needing to interrupt in commutation process to load, guarantee the steady, smooth of commutation process
Transition, stability is good, will not generate electric arc, and output power quality is high.
2, the phase recovery of target phase can also be original phase after the completion of commutation by phase shift commutation circuit of the invention
Position, and bypassed phasing unit by by-pass switch, the electric energy inputted from phase shift commutation circuit is directly output to load, phase
Position adjustment unit does not need to work long hours, and long service life, after the completion of commutation, phasing unit does not access circuit,
Harmonic wave will not be generated, output power quality is high.
3, commutation device of the invention does not need all to use phase shift commutation circuit in each phase, in three phase supply, as long as
There is two-phase using phase shift commutation circuit, it will be able to realize the steady commutation between any two-phase, it is at low cost.
4, the controller of commutation device of the invention also has memory, the original phase value of each phase is stored, in commutation
When, phase shift directly can be instructed by the original phase value of storage, realize steady commutation, not need the phase for detecting each phase
Value, so that structure is more simple, cost is lower.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of commutation device in the prior art.
Fig. 2 is the commutation device structural schematic diagram one of the specific embodiment of the invention.
Fig. 3 is the commutation device structural schematic diagram two of the specific embodiment of the invention.
Fig. 4 is the commutation system schematic of the specific embodiment of the invention.
Specific embodiment
Below in conjunction with Figure of description and specific preferred embodiment, the invention will be further described, but not therefore and
It limits the scope of the invention.
Embodiment one: as shown in Fig. 2, the commutation device of the present embodiment: including controller and phase shift commutation circuit；The shifting
Input terminal of the input terminal of phase commutation circuit as commutation device；The output end of the phase shift commutation circuit is in parallel, as commutation
The output end of device；The phase shift commutation circuit includes the first switch K1 and phasing unit being sequentially connected in series, the phase
Adjustment unit is used to carry out phase shift to the phase shift commutation circuit；The controller is connect with the phasing unit signal,
Phase shift is carried out to the phase shift commutation circuit for controlling the phasing unit；The controller and the first switch K1
Signal connection, for controlling the on-off of the first switch K1.
In the present embodiment, the phase shift commutation circuit further includes by-pass switch K2, the by-pass switch K2 with by described
First switch K1 and phasing unit series connection after circuit in parallel；The controller also connects with the by-pass switch K2 signal
It connects, for controlling the on-off of the by-pass switch K2.By by-pass switch, with after the completion of commutation by first switch K1 and phase
Position adjustment unit bypass, i.e., phasing unit will not be constantly in working condition, greatly shorten phasing unit
Working time, service life is improved, also greatly reduces by phasing unit bring harmonic wave, improve output electric energy
Quality.
In the present embodiment, the phase shift commutation circuit further includes breaker K3, and the breaker K3 is connected on described change
Between the input terminal of phase device and the input terminal of the by-pass switch.It can guarantee the safe operation of circuit by breaker K3,
When load exceeds the permissible load of commutation device, if electric current is more than the maximum current allowed, breaker K3 can be disconnected automatically, be protected
Demonstrate,prove the safety of commutation device and load.
In the present embodiment, the controller further includes voltage sampling unit；The voltage sampling unit and the phase shift
The input terminal of commutation circuit connects, the voltage signal of the input terminal for acquiring the phase shift commutation circuit.
In the present embodiment, the controller further includes Network Interface Module, logical for the controller and external network
Letter.By Network Interface Module, external equipment can receive, such as the instruction of three-phase imbalance control server, commutation device root
It is switched between different phases according to the instruction.Certainly, commutation device oneself can also detect the voltage condition of power supply network three-phase,
Autonomous decision carries out alternate switching.It can also be by the artificial control commutation device of the controller of commutation device in different phases
Between switch.
The commutation system of the present embodiment, as shown in figure 4, including commutation server and commutation device as described above；It is described
It is connected to the network between commutation server and the commutation device；The commutation server is used for the degree of unbalancedness of monitoring power-supply networks,
And it controls the commutation device and carries out commutation；The commutation device is for carrying out commutation under the control of the commutation server.
Such as the voltage condition of commutation monitoring server power supply network three-phase, when the load of discovery A phase is larger, and C phase load is smaller, causes three
It when imbalance between phase, needs to control fractional load is switched into C phase by A phase, to improve three-phase imbalance performance.At this point,
Commutation instruction is sent to selected commutation device by commutation server, is loaded by selected commutation device and switches to C by A phase
Phase.
The phase change method of the present embodiment, commutation device include: S1. in the mesh by the process of former phase commutation to target phase
When mark is conducted, the phase of the former phase is adjusted by the phasing unit of the former phase, and/or passes through the target phase
Phasing unit adjusts the phase of the target phase；So that the phase of the original phase is identical as the phase of the target phase, by
The former phase is mutually powered jointly with the target；S2. the former phase is disconnected, by the target mutually individually power supply.
Further, in the present embodiment, include: mutually to be sampled to the original in step S1, determine the former phase
Phase value；The target is mutually sampled, determines the phase value of the target phase；According to the phase value of the former phase and described
The phase value of target phase determines phase shift angle；The phase shift angle is individually adjusted by the phasing unit of the former phase, or
Person individually adjusts the phase shift angle, or the phase adjustment by the former phase by the phasing unit of the target phase
Unit and the phasing unit of the target phase adjust the phase shift angle jointly, so that the phase of the original phase and the mesh
The phase for marking phase is identical.
It further, in the present embodiment, further include step S3 after the step S2: by the phase of the target phase
Bit recovery bypasses the phasing unit of the target phase to its original phase.
In the present embodiment, commutation device as shown in connection with fig. 2, working principle and commutation process to commutation device carry out
It further explains.As shown in Figure 2, the circuit in commutation device corresponding to A, B, C three-phase is all phase shift commutation circuit.When need
When switching to C phase by A phase, A Xiang Weiyuan phase, C phase is target phase, and steadily changing by A phase to C phase can be realized by three kinds of modes
Phase.The phase of A phase is 0 degree in power supply network, and the phase of B phase is 120 degree, and the phase of C phase is 240 degree；The A phase and confession of commutation device
The A of power grid is connected, and B phase is connected with the B of power supply network, and C phase is connected with the C of power supply network.Commutation device passes through voltage sample
Unit can determine the phase of each phase, may thereby determine that phasing unit carries out the phase shift degree of phase shift operation.
First way is the mutually independent phase modulation of target: being connected by the first switch K1 that controller controls C phase, and controls C
The phasing unit of phase carries out phase shift to the phase of C phase so that C phase be output to the phase of the bus of commutation device output end with
A phase is output to that the phase on bus is identical, i.e., the phase that C phase exports is adjusted to 0 degree by 240 degree, at this point, disconnecting the of A phase
One switch K1 supplies power to the switching that C phase is powered by A phase at this point, completing.
The second way is former mutually independent phase modulation: original state is that the first switch K1 of A phase is disconnected, and by-pass switch K2 is led
Logical, the electric energy of A phase is directly output as load supplying by the by-pass switch of A phase；When needing to carry out commutation, A phase is first connected
First switch K1 disconnects the by-pass switch K2 of A phase, at this point, the electric energy of A phase passes through the first switch K1 and phase adjustment list of A phase
Member output；The output phase that A phase is adjusted by the phasing unit of A phase, so that the phase phase of the output phase of A phase and C phase
Together, i.e., the phase of A phase is adjusted to 240 degree by 0 degree, at this point, the by-pass switch K2 conducting of C phase is controlled again, it is total with C phase by A phase
It is all load supplying, then, then disconnects the first switch K1 of A phase, be individually load supplying by C phase, at this point, completes by A
Mutually supply power to the switching that C phase is powered.
The third mode is the former phase modulation that mutually mutually carries out with target: original state is that the first switch K1 of A phase is disconnected, bypass
Switch K2 conducting, the electric energy of A phase are directly output as load supplying by the by-pass switch of A phase；When needing to carry out commutation, guide
The first switch K1 of logical A phase, disconnects the by-pass switch K2 of A phase, at this point, the electric energy of A phase passes through the first switch K1 and phase of A phase
Adjustment unit output；Meanwhile the first switch K1 conducting of C phase is controlled, and control phase of the phasing unit to C phase of C phase
Carry out phase shift, first switch K1 and the phasing unit output that the electric energy of C phase passes through C phase；The phasing unit and C of A phase
The phasing unit of phase is in working condition, is adjusted to the phase of this phase, so that the phase of output is consistent, then
, can be by the phasing unit in A phase by 60 degree of phase adjustment when phase modulation, phase adjusted is 300 degree, while C phase
For phasing unit also by 60 degree of phase adjustment, phase adjusted is also 300 degree；At this point, being supplied when A phase is identical with C for load
Then electricity disconnects the first switch K1 of A phase, is individually for load supplying by C phase, supply at this point, completing and supplying power to C phase by A phase
The switching of electricity.
In the present embodiment, when using it is above-mentioned the first carry out Phase-switching with the third mode when, Phase-switching extremely
After individually being powered by C phase, the phasing unit of C phase is still within working condition, the i.e. phase and power supply network of the output end of C phase
The phase of middle C phase is inconsistent, has certain phase difference.Since phasing unit can generate certain harmonic wave at work,
It will affect power quality, be unfavorable for the stable operation of power grid, be also unfavorable for providing the electric energy of high quality for load.Therefore, it is necessary to
Further the phase of C phase is adjusted.It is further illustrated by taking above-mentioned first way as an example, in above-mentioned first way
In, in the first switch K1 for disconnecting A phase, after being individually for load supplying by C phase, the phase for the electric energy that C phase exports remains as 0 degree,
It is inconsistent with the phase of C phase in power supply network.At this point, being adjusted again by the phasing unit of C phase to phase, so that C phase
The phase recovery of the electric energy of output is consistent with the phase of C phase in power supply network to 240 degree, at this point, the by-pass switch K2 of conducting C phase,
The first switch of C phase is disconnected again, and stops phasing unit in C phase.At this point, the electric energy of C phase directly passes through and changes in power supply network
By-pass switch K2 in phase device C phase is exported to load, i.e., after commutation, phasing unit no longer works, so as to contract
The working time of short phasing unit improves its service life, and since phasing unit does not work, will not produce
Raw harmonic wave, influences power quality.
It should be noted that above-mentioned is only merely to be illustrated by taking three phase supply as an example, for the feelings of other multiphases power supply
Condition similarly adapts to.Also, for the situation of three phase supply, the commutation device of above-described embodiment has been correspondingly arranged A, B, C three-phase
Phase shift commutation circuit, it is of course also possible to two-phase is only arranged, such as A phase and C phase, commutation device also only access power supply network A phase and
C phase, to save cost, but same function is also relatively more simple, can only switch between A phase and C phase.
Embodiment two: the present embodiment is basically the same as the first embodiment, also include controller and phase shift commutation circuit, difference
Place further includes determining phase commutation circuit.The commutation device of the present embodiment further includes determining phase commutation circuit, described to determine phase commutation circuit
Input terminal of the input terminal as commutation device, the output end of the output end for determining phase commutation circuit and the phase shift commutation circuit
It is in parallel；It is described that determine phase commutation circuit include the second switch K4 being connected between input terminal and output end；The controller also with
The second switch K4 signal connection, for controlling the on-off of the second switch K4.As shown in figure 3, the A phase of commutation device and
B phase is phase shift commutation circuit, C Xiang Weiding phase commutation circuit.
The commutation system of the present embodiment includes commutation server and commutation device as described above；The commutation server and
It is connected to the network between the commutation device；The commutation server is used for the degree of unbalancedness of monitoring power-supply networks, and changes described in control
Phase device carries out commutation；The commutation device is for carrying out commutation under the control of the commutation server.Such as commutation server
The voltage condition of monitoring power-supply networks three-phase, when the load of discovery A phase is larger, and C phase load is smaller, causes the injustice between three-phase
When weighing apparatus, need control that fractional load is switched to C phase by A phase, to improve three-phase imbalance performance.At this point, commutation server will
Commutation instruction is sent to selected commutation device, is loaded by selected commutation device and switches to C phase by A phase.
The phase change method of the present embodiment is basically the same as the first embodiment, the difference is that since commutation device includes fixed
Phase commutation circuit, therefore, commutation device cannot be determined to switch between phase commutation circuit at two, can only determine phase commutation circuit
With phase shift commutation circuit, perhaps claims phase commutation circuit and determine phase commutation circuit or phase shift commutation circuit and phase shift commutation circuit
Between switch.For determining phase commutation circuit and phase shift commutation circuit, or claims phase commutation circuit and determine between phase commutation circuit
Switching, basic principle and the first way or identical, the as shown in Figure 3 commutation device of the second way in embodiment one, A
It is mutually phase shift commutation circuit, C Xiang Weiding phase commutation circuit, if carrying out needing to adopt by A phase to the commutation between C phase with B phase
Shown in the second way in embodiment one method realizes commutation.
Embodiment three: the present embodiment is basically the same as the first embodiment, the difference is that: in the controller of commutation device also
Including memory, for storing preset original phase value.Can not include in the controller of commutation device has voltage sample list
Member.The commutation system of the present embodiment is the same as example 1, and phase change method is basically the same as the first embodiment, the difference is that:
In step sl, it is determined and is moved according to the preset original phase value of the preset original phase value of the former phase and the target phase
Phase angle；The phase shift angle, or the phase by the target phase are individually adjusted by the phasing unit of the former phase
Position adjustment unit individually adjusts the phase shift angle, or passes through the former phasing unit of phase and the phase of the target phase
Position adjustment unit adjusts the phase shift angle jointly, so that the phase of the original phase is identical with the phase of the target phase.
The commutation device of the present embodiment does not need the phase that sampling determines each phase, but directly describes in memory each
The phase of phase, if the phase angle of A phase is 0 degree, the phase of B phase is 120 degree of angle, and the phase angle of C phase is 240.It is being changed
Xiang Shi, such as by A phase commutation to C phase when, when for carrying out commutation using first way shown in embodiment one, C phase is direct
Phase angle of the phase adjustment output it by phasing unit by being stored in A phase in memory, single by A phase
After only power switching to C phase individually power supply, then controlling the phasing unit of C phase for the phase recovery for exporting electric energy is memory
The phase angle of middle stored C phase, i.e., 240 degree.In the present embodiment, due to not needing voltage sampling unit, cost is lower, changes
It is mutually also more convenient, still, since the phase angle of each phase is stored in memory, when installing commutation device, need tight
Lattice by commutation device it is each it is corresponding be linked into each phase of power supply network, i.e., the A phase of commutation device can only be with the A phase of power supply network
Connection, B phase can only be connected with the B of power supply network, and C phase can only be connected with the C of power supply network.Otherwise it can cause confusion, so that changing
The phase of the exported electric energy of two-phase is inconsistent when phase, causes the danger such as phase fault.
Above-mentioned only presently preferred embodiments of the present invention, is not intended to limit the present invention in any form.Although of the invention
It has been disclosed in a preferred embodiment above, however, it is not intended to limit the invention.Therefore, all without departing from technical solution of the present invention
Content, technical spirit any simple modifications, equivalents, and modifications made to the above embodiment, should all fall according to the present invention
In the range of technical solution of the present invention protection.
Claims (12)
1. a kind of commutation device, it is characterised in that: including controller and phase shift commutation circuit；The input of the phase shift commutation circuit
Hold the input terminal as commutation device；The output end of the phase shift commutation circuit is in parallel, the output end as commutation device；
The phase shift commutation circuit includes the first switch being sequentially connected in series and phasing unit, and the phasing unit is used for
Phase shift is carried out to the phase shift commutation circuit；
The controller is connect with the phasing unit signal, is changed for controlling the phasing unit the phase shift
Circuitry phase carries out phase shift；
The controller is connect with the first switch signal, for controlling the on-off of the first switch.
2. commutation device according to claim 1, it is characterised in that: the phase shift commutation circuit further includes by-pass switch,
The by-pass switch with connected by the first switch and phasing unit after circuit in parallel；
The controller is also connect with the by-pass switch signal, for controlling the on-off of the by-pass switch.
3. commutation device according to claim 2, it is characterised in that: the phase shift commutation circuit further includes breaker, institute
Breaker is stated to be connected between the input terminal of the commutation device and the input terminal of the by-pass switch；
The controller is also connect with the breaker signal, for controlling the on-off of the breaker.
4. commutation device according to any one of claims 1 to 3, it is characterised in that: the controller further includes that voltage is adopted
Sample unit；The voltage sampling unit is connect with the input terminal of the phase shift commutation circuit, for acquiring the phase shift commutation electricity
The voltage signal of the input terminal on road.
5. commutation device according to claim 4, it is characterised in that: the controller further includes Network Interface Module, is used
In the controller and external network communication.
6. commutation device according to claim 5, it is characterised in that: it further include determining phase commutation circuit, it is described to determine Xiang Huanxiang
Input terminal of the input terminal of circuit as commutation device, the output end for determining phase commutation circuit and the phase shift commutation circuit
Output end is in parallel；It is described that determine phase commutation circuit include the second switch being connected between input terminal and output end.
7. commutation device according to any one of claims 1 to 3, it is characterised in that: further include storage in the controller
Device, for storing preset original phase value.
8. a kind of commutation system, it is characterised in that: including commutation server and such as commutation device described in claim 5 or 6；Institute
It states and is connected to the network between commutation server and the commutation device；
The commutation server is used for the degree of unbalancedness of monitoring power-supply networks, and controls the commutation device and carry out commutation；
The commutation device is for carrying out commutation under the control of the commutation server.
9. a kind of phase change method, which is characterized in that commutation device includes: by the process of former phase commutation to target phase
S1. when the target is conducted, the phase of the former phase is adjusted by the phasing unit of the former phase, and/or
The phase of the target phase is adjusted by the phasing unit of the target phase；So that the phase and the target of the original phase
The phase of phase is identical, by the former phase and the target mutually common power supply；
S2. the former phase is disconnected, by the target mutually individually power supply.
10. phase change method according to claim 9, it is characterised in that: further include step S3 after the step S2:
By the phase recovery of the target phase to its original phase, the phasing unit of the target phase is bypassed.
11. phase change method according to claim 10, it is characterised in that: include: mutually to be adopted to the original in step S1
Sample determines the phase value of the former phase；The target is mutually sampled, determines the phase value of the target phase；
Phase shift angle is determined according to the phase value of the phase value of the former phase and the target phase；
The phase shift angle, or the phase tune by the target phase are individually adjusted by the phasing unit of the former phase
Whole unit individually adjusts the phase shift angle, or passes through the former phasing unit of phase and the phase tune of the target phase
Whole unit adjusts the phase shift angle jointly, so that the phase of the original phase is identical with the phase of the target phase.
12. phase change method according to claim 10, it is characterised in that: in step S1, according to the preset of the former phase
The preset original phase value of original phase value and the target phase determines phase shift angle；
The phase shift angle, or the phase tune by the target phase are individually adjusted by the phasing unit of the former phase
Whole unit individually adjusts the phase shift angle, or passes through the former phasing unit of phase and the phase tune of the target phase
Whole unit adjusts the phase shift angle jointly, so that the phase of the original phase is identical with the phase of the target phase.
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| WO2012110472A1 (en) * | 2011-02-18 | 2012-08-23 | Commissariat à l'énergie atomique et aux énergies alternatives | Load-balancing device on a polyphase network |
| 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 |
| CN107276106A (en) * | 2017-06-05 | 2017-10-20 | 普世通（北京）电气有限公司 | A kind of low pressure phase selection balance system and its method of work |
| CN108736495A (en) * | 2018-07-03 | 2018-11-02 | 北京智创骏驰电气科技有限公司 | A kind of novel phase-change switch device |
| CN209419233U (en) * | 2019-01-18 | 2019-09-20 | 国网湖南省电力有限公司 | A kind of commutation device and system |
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- 2019-01-18 CN CN201910049162.7A patent/CN109842134B/en active Active
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| WO2012110472A1 (en) * | 2011-02-18 | 2012-08-23 | Commissariat à l'énergie atomique et aux énergies alternatives | Load-balancing device on a polyphase network |
| 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 |
| CN107276106A (en) * | 2017-06-05 | 2017-10-20 | 普世通（北京）电气有限公司 | A kind of low pressure phase selection balance system and its method of work |
| CN108736495A (en) * | 2018-07-03 | 2018-11-02 | 北京智创骏驰电气科技有限公司 | A kind of novel phase-change switch device |
| CN209419233U (en) * | 2019-01-18 | 2019-09-20 | 国网湖南省电力有限公司 | A kind of commutation device and system |
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