CN102522760A - Method for switching phase lines of three-phase circuit and capable of preventing inter-phase short-circuit and phase change switch device - Google Patents
Method for switching phase lines of three-phase circuit and capable of preventing inter-phase short-circuit and phase change switch device Download PDFInfo
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- CN102522760A CN102522760A CN2011103961223A CN201110396122A CN102522760A CN 102522760 A CN102522760 A CN 102522760A CN 2011103961223 A CN2011103961223 A CN 2011103961223A CN 201110396122 A CN201110396122 A CN 201110396122A CN 102522760 A CN102522760 A CN 102522760A
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The invention relates to a method for switching the phase lines of a three-phase circuit and capable of preventing inter-phase short-circuit and a phase change switch device, which belong to the field of transformation and distribution devices. A phase line switch and a self-resetting single-phase switch are arranged in the shell body of the phase change switch; when load switching needs to be carried out, first the self-resetting single-phase switch is controlled to be off, and the external power supply of the phase change switch device is cut off; then the moving contact of an electric rotation switch is rotated and a 'one-from-three' rotation switch method is adopted, so that the phase sequence of the phase line input end of a single-phase power supply is switched to specified phase lines; and finally the self-resetting single-phase switch to be on, and the external power supply of the phase change switch device is recovered. Because the 'one-from-more' rotation switch method is adopted, the connection with a load end is cut off when in switching, the phenomenon that two phase lines are short-circuited when the phase change switch fails to work is thoroughly overcome, the whole switching process is safe and reliable, and the safety of power supply is improved. The invention can be widely applied to the field of low-voltage power supply and the operation of power grids.
Description
Technical field
The invention belongs to change power distribution equipment field, relate in particular to a kind of method and device thereof that is used for to make the alternate load balancing distribution of three-phase power line.
Background technology
Make as a whole electric power system; In its three-phase power line; The equilibrium of loading between each phase line distributes ten minutes to be necessary; The phase line current balance problem that this not only relates to three-phase power line also relates to the problem of many aspects such as the economical operation that reduces line loss, electrical network and safety.
Because the imbalance of electric power system three-phase load, a certain phase load is bigger than normal, and line loss is increased.Simultaneously, this phase circuit is worked under big load, both can influence the security of operation of transformer, has reduced the power supply capacity of transformer again.
So the equilibrium of phase specific electric load distributes in the three-phase power line, to economy, the safe operation of whole power distribution network, and the reliability that guarantees controller switching equipment, all be very crucial.
The day for announcing is on 05 18th, 2011, and notification number is the Chinese utility model patent of CN201839007U, discloses a kind of " remote control phase place automatic transfer switch ", its in diverter switch, be provided with three separate and have a single-phase switch of interlock; The corresponding connection of three phase lines of each single-phase switch power input and three-phase line, the output parallel connection of each single-phase switch; A current transformer is set in its lower end; Electronic module is set on diverter switch; The output of load current instrument transformer is connected with the monitor signal input of electronic module; The corresponding successively connection of control end of the control signal output ends of electronic module and three single-phase switch branch/contacting controling circuits or module; The monitor signal output and the signal input end of electronic module are connected with centralized-control center through wireless network or carrier line.It can also remote control switch the phase sequence at a certain single-phase load circuit place between the three phase mains of supply line except having earth leakage protective and excess current protective function, help realizing that the equilibrium of each alternate load distributes.
Technique scheme can realize the switching of a certain single-phase load between each phase line of three-phase power line smoothly, has also solved the automation issues of line load adjustment, and the equilibrium that helps to realize each alternate load automatically distributes, and is convenient to remote operation.
But, in this technical scheme, the power input of three single-phase switchs respectively with the corresponding connection of three phase lines of three phase mains, the output parallel connection of three single-phase switchs, corresponding connection with the load side power input line.Sort circuit connected mode and circuit control model; Still the situation that can not fundamentally avoid two phase lines to connect simultaneously in case switch breaks down, causes two phase lines to connect when being short-circuited simultaneously; Just can cause accident of power supply, so its security reliability still awaits further improvement.
Summary of the invention
Technical problem to be solved by this invention provides a kind of three-phase line phase line changing method and phase-change switch device of avoiding phase fault; It adopts the rotation switching mode of " multiselect one "; And break itself and being connected of load side at handoff procedure; Whole handoff procedure is safe and reliable, and the situation of two phase line short circuits takes place when thoroughly having avoided the phase-change switch device to break down.
Technical scheme of the present invention is: a kind of three-phase line phase line changing method of avoiding phase fault is provided; Comprise that according to the line load current variation switching of control phase-change switch switches to load on other phase lines; The automatic adjustment of loading between the realization three-phase line is characterized in that:
A, in the housing of phase-change switch device, an electronic phase line diverter switch and one are set from resetting single-phase switch;
The input of B, its said electronic phase line diverter switch is with the phase line corresponding connection respectively of three phase mains; The output of said electronic phase line diverter switch through from resetting single-phase switch, constitutes the single phase poaer supply phase line output terminal of whole phase-change switch device;
C, load when switching when needs, after the commutation instruction of receiving centralized-control center, described phase-change switch device is at first controlled from the single-phase switch that resets and is broken off, and breaks off the external power supply of phase-change switch device;
D, described phase-change switch device are through the switching mode of " three select "; Rotation through electronic phase line diverter switch moving contact/move; The switching of three phase mains phase line is carried out in remote control, makes to switch to the phase sequence that single phase poaer supply phase line input belongs on the phase line of appointment;
E, treat that the moving contact of electronic phase line diverter switch moves into place, the switch operating of three phase mains phase line finishes;
F, phase-change switch device are controlled the closure from the single-phase switch that resets, and recover the external power supply of phase-change switch device.
Concrete, described electronic phase line diverter switch is the electronic rotation diverter switch of " three select one " formula, three fixed contact inputs of said electronic phase line diverter switch are with three phase lines corresponding connection respectively of three phase mains; The moving contact output of electronic phase line diverter switch is through constituting the single phase poaer supply phase line output terminal of whole phase-change switch device from the single-phase switch that resets.
Further, at said phase line output terminal, be provided with current transformer, to carry out corresponding load monitoring from the single-phase switch that resets.
The present invention also provides a kind of three-phase line phase line switching device shifter of avoiding phase fault, comprises the phase-change switch housing of the main power source input that has three-phase and four-line and single-phase main power source output, it is characterized in that:
A phase line diverter switch and one are set from resetting single-phase switch in the housing of phase-change switch, the power input of phase line diverter switch respectively with the corresponding connection of three phase lines of three phase mains; The output of phase line diverter switch with from resetting the corresponding connection of power supply phase line incoming line of single-phase switch; The power supply phase line output terminal of single-phase switch is provided with a current transformer that is used to monitor load current;
In the phase-change switch housing or on the phase-change switch housing, setting comprises from resetting " energising "/" outage " the operational order generation functional circuit of single-phase switch " disconnection "/" connection " and diverter switch motor and the electronic module of wireless network or carrier signal teletransmission/receiving module circuit;
The control signal output ends of said electronic module is with the corresponding successively connection of control end of " energising " or " outage " control circuit module of the single-phase switch that resets certainly " disconnection " or " connection " and diverter switch motor;
The monitor signal output and the signal input end of electronic module are connected with centralized-control center through wireless network or carrier line.
Concrete, described phase line diverter switch is an electrodynamic type rotation diverter switch.
Further, described electronic module comprises single-chip microcomputer or industrial computer modular circuit.
Described electronic module comprises electric current, voltage, leakage current detect and defencive function circuit.
Compare with prior art, advantage of the present invention is:
1. adopt the rotation switching mode of " three select ", under any circumstance can only connect a phase line, the situation of two phase line short circuits takes place in the time of can thoroughly avoiding phase-change switch to break down; And the switching mode of employing " first deenergization output is carried out switching between input three phase mains phase line again ", the phenomenon of striking sparks in the dynamic and static contact contact process in the time of can avoiding switching, thereby the fail safe that has improved powered operation more;
2. can be according to the line load change in current; Binding data teletransmission and telecontrol engineering again; The remote control single-phase switch breaks off and diverter switch switches to load on other phase lines; Solved the automation issues of line load adjustment, and made the adjustment of line load realize promptness and accuracy, also can monitor and protect simultaneously electric current, voltage and electric leakage;
3. whole commutation apparatus structure is simple, and reliable in action is economical and practical, is convenient to remote operation, and the equilibrium that helps to realize each alternate load automatically distributes.
Description of drawings
Fig. 1 is a changing method step block diagram of the present invention;
Fig. 2 is the circuit module structural representation of apparatus of the present invention.
Embodiment
Below in conjunction with accompanying drawing the present invention is further specified.
Among Fig. 1; The invention provides a kind of three-phase line phase line changing method of avoiding phase fault; Comprise that according to the line load current variation switching of control its switch switches to load on other phase lines; The automatic adjustment of loading between the realization three-phase line, the operating procedure of its method comprises:
A, in the housing of phase-change switch device, an electronic phase line diverter switch and one are set from resetting single-phase switch;
The input of B, its said electronic phase line diverter switch is with the phase line corresponding connection respectively of three phase mains; The output of said electronic phase line diverter switch through from resetting single-phase switch, constitutes the single phase poaer supply phase line output terminal of whole phase-change switch device;
C, load when switching when needs, after the commutation instruction of receiving centralized-control center, described phase-change switch device is at first controlled from the single-phase switch that resets and is broken off, and breaks off the external power supply of phase-change switch device;
D, described phase-change switch device are through the switching mode of " three select "; Rotation through electronic phase line diverter switch moving contact/move; The switching of three phase mains phase line is carried out in remote control, makes to switch to the phase sequence that single phase poaer supply phase line input belongs on the phase line of appointment;
E, treat that the moving contact of electronic phase line diverter switch moves into place, the switch operating of three phase mains phase line finishes;
F, phase-change switch device are controlled the closure from the single-phase switch that resets, and recover the external power supply of phase-change switch device.
Can know that by figure described electronic phase line diverter switch is the electronic rotation diverter switch of " three select one " formula, three fixed contact inputs of said electronic phase line diverter switch are with three phase lines corresponding connection respectively of three phase mains; The moving contact output of electronic phase line diverter switch is through constituting the single phase poaer supply phase line output terminal of whole phase-change switch device from the single-phase switch that resets.
Further, at said phase line output terminal, be provided with current transformer, to carry out corresponding load monitoring from the single-phase switch that resets.
Because the present technique scheme is to apply for before this and the notification number of obtaining the authorization is the further improvement on the basis of Chinese utility model patent of CN201839007U that the applicant it is no longer narrated at this with the identical place of a last technical scheme.
Because electronic rotation diverter switch adopts the rotation switching mode of " multiselect one " (among figure be example with " three select one "); Its fixed contact respectively with the corresponding connection of three phase lines of three phase mains; Its moving contact rotates under the driving of motor/moves; Contact with each fixed contact successively, so the situation of two phase line short circuits, the fail safe that has improved powered operation take place can thoroughly avoid phase-change switch to break down the time.
Output in electronic rotation diverter switch is connected in series one from the homing position type single-phase switch; Break load side at handoff procedure; Can guarantee in the whole handover operation that handoff procedure is the switching under no load condition, the spark phenomenon in the time of can avoiding switching in the dynamic and static contact contact process on the one hand; Also can further guarantee on the other hand in handoff procedure, to prevent between the three-phase phase line of power end phase fault to take place.
Among Fig. 2, in the housing 1 of phase-change switch, be provided with a phase line diverter switch 2 and one from resetting single-phase switch 3, the power input of diverter switch respectively with the corresponding connection of three phase lines of three phase mains, the three-phase power input end 5 of formation phase-change switch.
The output of phase line diverter switch with from resetting the corresponding connection of power supply phase line incoming line of single-phase switch; The power output end of phase line diverter switch is as the power supply phase line input of single-phase switch, and the power supply phase line output terminal of single-phase switch is as the power supply phase line output terminal 4 of phase-change switch.
The power output end 4 of phase-change switch is provided with a current transformer L who is used to monitor load current.
In the phase-change switch housing or on the phase-change switch housing, setting comprises from resetting " energising "/" outage " the operational order generation functional circuit of single-phase switch " disconnection "/" connection " and diverter switch motor and the electronic module of wireless network or carrier signal teletransmission/receiving module circuit;
The control signal output ends of said electronic module is with the corresponding successively connection of control end of " energising " or " outage " control circuit module of the single-phase switch that resets certainly " disconnection " or " connection " and diverter switch motor;
The monitor signal output and the signal input end of electronic module are connected with centralized-control center through wireless network or carrier line.
Concrete, described phase line diverter switch is an electrodynamic type rotation diverter switch.
In the phase-change switch housing or on the phase-change switch housing, be provided with electronic module 6; Described electronic module comprises single-chip microcomputer or industrial computer modular circuit.
Described electronic module also comprises electric current, voltage, leakage current detect and defencive function circuit.
Can know that by figure the output of load current instrument transformer is connected with the monitor signal input of electronic module.
The control signal output ends of electronic module and " connection " of reset certainly single-phase switch " separating brake "/" combined floodgate " control end and phase line diverter switch motor and control end corresponding successively connection of difference of " disconnection " control circuit module.
The monitor signal output and the signal input end of electronic module through wireless network or carrier line, are connected with centralized-control center.
Above-mentioned commutation functional circuit is guaranteed when phase-change switch carries out commutation; At first single-phase switch is carried out " opening/break off " operation; Then, switch on the phase line of appointment, again single-phase switch is carried out " closure/connection " operation again by motor drives diverter switch slide plate.
The single-phase load (not shown) is connected with the power output end of phase-change switch, and the slide plate of process diverter switch is connected with a certain phase line in the three phase mains, from said three phase mains, obtains single phase poaer supply.
Electronic module partly adopts prior art to get final product, and no specific (special) requirements is so its concrete circuit is no longer narrated at this.
The summary of this device course of work:
The size of current of current transformer monitoring load; By the wireless network in the electronic module or carrier line with the teletransmission of load current value to centralized-control center; Through computer/industrial computer and monitoring/Control Software thereof; Send the adjusting/equilibrium instruction of loading between the three-phase power line by centralized-control center, output needle is to " disconnection " or " connection " of single-phase switch and " energising " or " outage " operating control signal of diverter switch motor.
" energising " of " disconnection " of its single-phase switch or " connection " and diverter switch motor or " outage " operating control signal transfer to electronic module via wireless network or carrier line.
After wireless network or carrier signal teletransmission/receiving module circuit receive the load phase place adjustment instruction by the centralized-control center computer platform; Operational order modular circuit in the electronic module; " disconnection " or " connection " and " energising " or " outage " operating control signal of diverter switch motor of output single-phase switch; Make corresponding switch step; Realize telemechanical, remote control, the adjustment in real time of three-phase load, realize the switching of a certain single-phase load between each phase line of three-phase power line smoothly, realize that automatically the equilibrium of each alternate load distributes.
Because technical scheme of the present invention has adopted the rotation switching mode of " multiselect one "; And break itself and being connected of load side at handoff procedure; The situation of two phase line short circuits takes place when thoroughly having avoided phase-change switch to break down; Whole handoff procedure is safe and reliable, has improved the fail safe of powered operation.
The present invention can be widely used in low-voltage power supply and power network operation field.
Claims (7)
1. the three-phase line phase line changing method that can avoid phase fault comprises according to the line load current variation, and the switching of control phase-change switch switches to load on other phase lines, and the automatic adjustment of loading between the realization three-phase line is characterized in that:
A, in the housing of phase-change switch device, an electronic phase line diverter switch and one are set from resetting single-phase switch;
The input of B, its said electronic phase line diverter switch is with the phase line corresponding connection respectively of three phase mains; The output of said electronic phase line diverter switch through from resetting single-phase switch, constitutes the single phase poaer supply phase line output terminal of whole phase-change switch device;
C, load when switching when needs, after the commutation instruction of receiving centralized-control center, described phase-change switch device is at first controlled from the single-phase switch that resets and is broken off, and breaks off the external power supply of phase-change switch device;
D, described phase-change switch device are through the switching mode of " three select "; Rotation through electronic phase line diverter switch moving contact/move; The switching of three phase mains phase line is carried out in remote control, makes to switch to the phase sequence that single phase poaer supply phase line input belongs on the phase line of appointment;
E, treat that the moving contact of electronic phase line diverter switch moves into place, the switch operating of three phase mains phase line finishes;
F, phase-change switch device are controlled the closure from the single-phase switch that resets, and recover the external power supply of phase-change switch device.
2. according to the described three-phase line phase line changing method of avoiding phase fault of claim 1; It is characterized in that described electronic phase line diverter switch is the electronic rotation diverter switch of " three select one " formula; Three fixed contact inputs of said electronic phase line diverter switch are with three phase lines corresponding connection respectively of three phase mains; The moving contact output of electronic phase line diverter switch is through constituting the single phase poaer supply phase line output terminal of whole phase-change switch device from the single-phase switch that resets.
3. according to the described three-phase line phase line changing method of avoiding phase fault of claim 1, it is characterized in that being provided with current transformer, to carry out corresponding load monitoring at said phase line output terminal from the single-phase switch that resets.
4. three-phase line phase line switching device shifter according to the phase fault avoided of the said method work of claim 1 comprises it is characterized in that the phase-change switch housing of the main power source input that has three-phase and four-line and single-phase main power source output:
A phase line diverter switch and one are set from resetting single-phase switch in the housing of phase-change switch, the power input of phase line diverter switch respectively with the corresponding connection of three phase lines of three phase mains; The output of phase line diverter switch with from resetting the corresponding connection of power supply phase line incoming line of single-phase switch; The power supply phase line output terminal of single-phase switch is provided with a current transformer that is used to monitor load current;
In the phase-change switch housing or on the phase-change switch housing, setting comprises from resetting " energising "/" outage " the operational order generation functional circuit of single-phase switch " disconnection "/" connection " and diverter switch motor and the electronic module of wireless network or carrier signal teletransmission/receiving module circuit;
The control signal output ends of said electronic module is with the corresponding successively connection of control end of " energising " or " outage " control circuit module of the single-phase switch that resets certainly " disconnection " or " connection " and diverter switch motor;
The monitor signal output and the signal input end of electronic module are connected with centralized-control center through wireless network or carrier line.
5. according to the described three-phase line phase line switching device shifter of avoiding phase fault of claim 4, it is characterized in that described phase line diverter switch is an electrodynamic type rotation diverter switch.
6. according to the described three-phase line phase line switching device shifter of avoiding phase fault of claim 4, it is characterized in that described electronic module comprises single-chip microcomputer or industrial computer modular circuit.
7. according to the described three-phase line phase line switching device shifter of avoiding phase fault of claim 4, it is characterized in that described electronic module comprises electric current, voltage, leakage current detect and defencive function circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103961223A CN102522760A (en) | 2011-12-03 | 2011-12-03 | Method for switching phase lines of three-phase circuit and capable of preventing inter-phase short-circuit and phase change switch device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103961223A CN102522760A (en) | 2011-12-03 | 2011-12-03 | Method for switching phase lines of three-phase circuit and capable of preventing inter-phase short-circuit and phase change switch device |
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| CN102522760A true CN102522760A (en) | 2012-06-27 |
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| CN2011103961223A Pending CN102522760A (en) | 2011-12-03 | 2011-12-03 | Method for switching phase lines of three-phase circuit and capable of preventing inter-phase short-circuit and phase change switch device |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104092229A (en) * | 2014-07-14 | 2014-10-08 | 山东卓尔电气有限公司 | Distributed type power supply zone branch circuit three-phase load current balance monitoring method and device |
| CN104517777A (en) * | 2013-09-30 | 2015-04-15 | 景德镇景光精盛电器有限公司 | Permanent magnet vacuum arbitrary phase-change switch |
| CN104934994A (en) * | 2015-07-01 | 2015-09-23 | 国家电网公司 | Low-voltage phase-change switch |
| CN107181269A (en) * | 2017-07-20 | 2017-09-19 | 南京捷泰电力设备有限公司 | It is a kind of to realize the threephase load switching device with alternate blocking function with two switches |
| CN107181268A (en) * | 2017-06-16 | 2017-09-19 | 国网浙江省电力公司电力科学研究院 | The intelligent phase-change switch and its method of work of anti-phase fault before a kind of energization |
| CN108448599A (en) * | 2018-03-30 | 2018-08-24 | 杭州海兴电力科技股份有限公司 | Phase change method based on the commutation system suitable for three phase network |
| CN108448600A (en) * | 2018-03-30 | 2018-08-24 | 杭州海兴电力科技股份有限公司 | Commutation system suitable for three phase network |
| CN113539736A (en) * | 2020-04-15 | 2021-10-22 | 天津首瑞智能电气有限公司 | Switch device |
| CN113644622A (en) * | 2021-01-18 | 2021-11-12 | 保定钰鑫电气科技有限公司 | Device for auxiliary treatment of interphase short circuit |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104517777A (en) * | 2013-09-30 | 2015-04-15 | 景德镇景光精盛电器有限公司 | Permanent magnet vacuum arbitrary phase-change switch |
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| CN104092229A (en) * | 2014-07-14 | 2014-10-08 | 山东卓尔电气有限公司 | Distributed type power supply zone branch circuit three-phase load current balance monitoring method and device |
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| CN104934994A (en) * | 2015-07-01 | 2015-09-23 | 国家电网公司 | Low-voltage phase-change switch |
| CN107181268A (en) * | 2017-06-16 | 2017-09-19 | 国网浙江省电力公司电力科学研究院 | The intelligent phase-change switch and its method of work of anti-phase fault before a kind of energization |
| CN107181268B (en) * | 2017-06-16 | 2023-11-07 | 国网浙江省电力公司电力科学研究院 | Intelligent phase change switch capable of preventing interphase short circuit before electrifying and working method thereof |
| CN107181269A (en) * | 2017-07-20 | 2017-09-19 | 南京捷泰电力设备有限公司 | It is a kind of to realize the threephase load switching device with alternate blocking function with two switches |
| CN108448599A (en) * | 2018-03-30 | 2018-08-24 | 杭州海兴电力科技股份有限公司 | Phase change method based on the commutation system suitable for three phase network |
| CN108448600A (en) * | 2018-03-30 | 2018-08-24 | 杭州海兴电力科技股份有限公司 | Commutation system suitable for three phase network |
| CN113539736A (en) * | 2020-04-15 | 2021-10-22 | 天津首瑞智能电气有限公司 | Switch device |
| CN113644622A (en) * | 2021-01-18 | 2021-11-12 | 保定钰鑫电气科技有限公司 | Device for auxiliary treatment of interphase short circuit |
| CN113644622B (en) * | 2021-01-18 | 2023-07-18 | 保定钰鑫电气科技有限公司 | Device for assisting in processing interphase short circuit |
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Application publication date: 20120627 |