CN101860075A - Three-power supply automatic switching device - Google Patents
Three-power supply automatic switching device Download PDFInfo
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- CN101860075A CN101860075A CN 201010186713 CN201010186713A CN101860075A CN 101860075 A CN101860075 A CN 101860075A CN 201010186713 CN201010186713 CN 201010186713 CN 201010186713 A CN201010186713 A CN 201010186713A CN 101860075 A CN101860075 A CN 101860075A
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Abstract
The invention relates to a three-power supply automatic switching device, which comprises a first standby power supply, a second standby power supply and incoming circuit breakers Q1, Q2 and Q3, wherein the incoming circuit breakers Q1, Q2 and Q3 are connected with a working power supply, the first standby power supply and the second power supply respectively. Switching value terminals of the three power suppliers are connected with an upper computer by the switching value input/output module; the upper computer comprises a Q1 tripping module, a Q2 switching-in module and a Q3 switching-in module; as bus bar voltage is low, the working power supply is automatically broken and the standby power supply is used; as the first standby power supply is not used normally, the second power supply is provided to supply power. The upper computer uses a DCS system or a PLC system. The three-power supply automatic switching device of the invention has the effects that three power suppliers can be switched automatically by using the upper computer control device so as to maintain conveniently and reduce cost. Moreover, the invention adopts a break-before-make switching way, thus ensuring the safety and reliability of the standby power supply.
Description
Technical field
The present invention relates to a kind of automatic switching control equipment of three-way power.
Background technology
When there is the three-way power inlet wire in motor control center (hereinafter to be referred as MCC), usually, two cover double-power supply switching devices are adopted in the switching of MCC three-way power inlet wire, promptly adopt the first cover double-power supply switching device that the first via and the second road power supply are switched back output earlier, and then switch with the output and the 3rd power supply of the second cover double-power supply switching device with the first cover double-power supply switching device; Perhaps adopting relay to build logical circuit switches.
Said method equipment is more, has increased fault point and maintenance workload, and needs the use that cooperatively interacts of two cover double-power supply switching devices, and cost is higher.
Summary of the invention
Technical problem to be solved by this invention provides a kind of three-power supply automatic switching device, and is easy to maintenance, reduces cost.
The present invention solves the problems of the technologies described above the technical scheme that adopts to provide a kind of three-power supply automatic switching device, comprise working power, first stand-by power supply, second stand-by power supply and lead-in circuit breaker Q1, the Q2 and the Q3 that link to each other with described working power, first stand-by power supply and second stand-by power supply respectively; Wherein, the switching value binding post of described three power supplys links to each other with host computer by the switching value input/output module; Described host computer comprises: the Q1 module that trips, monitor busbar voltage, and when the MCC busbar voltage is low, think that working power breaks down, described Q1 tripping operation module output Q1 trip signal disconnects working power; Q2 combined floodgate module, when described working power lead-in circuit breaker Q1 tripping operation back and the described first stand-by power supply side voltage normal, described Q2 combined floodgate module output Q2 switching signal, the first stand-by power supply lead-in circuit breaker Q2 closure is powered by described first stand-by power supply; Q3 combined floodgate module, when described working power lead-in circuit breaker Q1 tripping operation back and described first stand-by power supply can not normally drop into, described Q3 combined floodgate module output Q3 switching signal, the second stand-by power supply lead-in circuit breaker Q3 closure is powered by described second stand-by power supply.
Above-mentioned three-power supply automatic switching device, wherein, the switching value lead-out terminal of described working power lead-in circuit breaker Q1, the first stand-by power supply lead-in circuit breaker Q2 and the second stand-by power supply lead-in circuit breaker Q3 links to each other with host computer by switching input module; State output end of described working power, first stand-by power supply and second stand-by power supply links to each other with host computer by switching input module; Described host computer links to each other by the folding lock input terminal of switching value output module and described lead-in circuit breaker Q1, Q2 and Q3.
Above-mentioned three-power supply automatic switching device, wherein, described host computer is DCS system or PLC system.
The present invention contrasts prior art following beneficial effect: three-power supply automatic switching device provided by the invention, and utilize the PC control device to realize that three power supplys automatically switch, easy to maintenance, reduce cost.In addition, the present invention adopts the switching mode of break-before-make, and it is safe and reliable to have guaranteed that stand-by power supply drops into.
Description of drawings
Fig. 1 is MCC three electric power incoming line principle winding diagrams of the present invention;
Fig. 2 is a host computer high-level schematic functional block diagram of the present invention;
Fig. 3 is a host computer logic control schematic diagram of the present invention;
Fig. 4 is MCC three electric power incoming line automatic switchover flow charts.
Among the figure: the 1-working power; 2-first stand-by power supply; 3-second stand-by power supply; The 4-Q1 module that trips; 5-Q2 combined floodgate module; 6-Q3 combined floodgate module; The 7-host computer; 8-switching value input/output module; 9-switching value binding post.
Q1-working power lead-in circuit breaker; The Q2-first stand-by power supply lead-in circuit breaker; The Q3-second stand-by power supply lead-in circuit breaker; The PT-bus-bar potential transformer; FU-protects fuse.
Embodiment
The invention will be further described below in conjunction with drawings and Examples.
Fig. 1 is MCC three electric power incoming line principle winding diagrams of the present invention; Fig. 2 is a host computer high-level schematic functional block diagram of the present invention.
See also Fig. 1 and Fig. 2, three-power supply automatic switching device of the present invention comprises working power 1, first stand-by power supply, 2, the second stand-by power supplies 3 and lead-in circuit breaker Q1, the Q2 and the Q3 that link to each other with described working power, first stand-by power supply and second stand-by power supply respectively; Wherein, the switching value binding post 9 of described three power supplys links to each other with host computer 7 by switching value input/output module 8; Described host computer 7 comprises Q1 tripping operation module 4, Q2 combined floodgate module 5 and Q3 combined floodgate module 6.
The Q1 module 4 that trips monitors busbar voltage, when the MCC busbar voltage is low, thinks that working power breaks down, 7 Q1 trip signals of described host computer, i.e. and Q1 tripping operation module 4 output Q1 trip signals disconnect working power;
Q2 combined floodgate module 5, after described working power lead-in circuit breaker Q1 tripping operation and described first stand-by power supply normal, promptly the first stand-by power supply side voltage is normal, the first stand-by power supply state output end fault-free signal, described host computer is sent out the order of Q2 combined floodgate, be Q2 combined floodgate module 5 output Q2 switching signals, the first stand-by power supply lead-in circuit breaker Q2 closure is by described first stand-by power supply power supply;
Q3 combined floodgate module 6, after described working power lead-in circuit breaker Q1 tripping operation and described first stand-by power supply can not normally drop into, promptly the first stand-by power supply side voltage is undesired, perhaps the first stand-by power supply state output end has fault-signal, described host computer is sent out the order of Q3 combined floodgate, be Q3 combined floodgate module 6 output Q3 switching signals, the second stand-by power supply lead-in circuit breaker Q3 closure is by described second stand-by power supply power supply.
The concrete wiring of switching value binding post 9 and switching value input/output module 8 is as follows: the switching value lead-out terminal of described working power lead-in circuit breaker Q1, the first stand-by power supply lead-in circuit breaker Q2 and the second stand-by power supply lead-in circuit breaker Q3 links to each other with host computer 7 by switching input module; State output end of described working power 1, first stand-by power supply 2 and second stand-by power supply 3 links to each other with host computer 7 by switching input module; Described host computer 7 links to each other by the folding lock input terminal of switching value output module and described lead-in circuit breaker Q1, Q2 and Q3.The switching value lead-out terminal of described lead-in circuit breaker Q1, Q2 and Q3 comprises: the "on" position of Q1～Q3, tripped condition; State output end of described three power supplys comprises that fault trip, resultant fault, mains side voltage are normal, and the MCC busbar voltage is low.Described host computer 7 comprises by switching value output module output signal: the combined floodgate order of Q1～Q3, trip signal.PT is the MCC bus-bar potential transformer among Fig. 1, and for host computer 7 provides the busbar voltage low signal, FU is a PT protection fuse.Described host computer 7 can adopt the Indusstrial of German ABB
ITThe AC800F system; Described switching value input/output module 8 can adopt the Indusstrial of German ABB
ITThe DI810 input module of AC800F system and DO810 output module.
Fig. 3 is a host computer logic control schematic diagram of the present invention; Fig. 4 is MCC three electric power incoming line automatic switchover flow charts.
Please continue referring to Fig. 3 and Fig. 4, power industry distribution technique field is generally adopted dcs (hereinafter to be referred as DCS) or is used a PLC control electric equipment, it is the device that host computer can have the logic control function for DCS system or PLC system etc., be host computer below with DCS, MCC three electric power incoming line automatic switchover flow processs of the present invention are as follows:
Step S1: when moving first, enter step S2;
Step S2: check whether three power supplys are normal,
1) if undesired, then enter step S3 and overhaul three power circuits, return step S2 after maintenance is finished;
2) if normal, then enter step S4 and disconnect Q2, Q3, closed Q1, and drop into three power supply automatic switchover logics, enter step S5 then;
Step S5: monitor the MCC busbar voltage;
Step S6: detect whether satisfy logic 1., promptly move Q1 tripping operation module 4, judge whether to need to cut off working power 1;
1) if do not satisfy, then returns step S5;
2) if satisfy, then enter step S7 DCS and send out the Q1 trip signal, i.e. the tripping operation of Q1 among DCS module 4 output Q1 trip signals disconnect working power;
Step S8: detect whether satisfy logic 2., promptly move Q2 combined floodgate module 5, judge whether to need to drop into first stand-by power supply 2;
1) if satisfy, then enter step S9 DCS and send out the Q2 order of closing a floodgate, i.e. 5 output Q2 switching signals of Q2 combined floodgate module among the DCS, the Q2 breaker closing by the power supply of first stand-by power supply, and skips to step S12 and withdraws from the automatic switchover logic;
2) if do not satisfy, then enter step S10;
Step S10: operation, detect whether satisfy logic 3., promptly move Q3 combined floodgate module 6, judge whether to need to drop into second stand-by power supply 3;
1) if satisfy, then enter step S11 DCS and send out the Q3 order of closing a floodgate, i.e. 6 output Q3 switching signals of Q3 combined floodgate module among the DCS, the Q3 breaker closing by the power supply of second stand-by power supply, and skips to step 12 and withdraws from the automatic switchover logic;
2) if do not satisfy, then enter step S12;
Step S12: withdraw from the automatic switchover logic, and return step S3, prepare to drop into three power supply automatic switchover logics next time.
In sum, the three-power supply automatic switching device that provides of the present invention, the switching mode of employing break-before-make, it is safe and reliable to have guaranteed that stand-by power supply drops into.In addition, this programme adopts and hauls oneself willingly into the not mode of runback, is for after dropping at stand-by power supply, guarantees that other two-way power supply under normal situation, by manually resetting, has guaranteed the safe and reliable of distribution system, and flexible operation.
Though the present invention discloses as above with preferred embodiment; right its is not in order to qualification the present invention, any those skilled in the art, without departing from the spirit and scope of the present invention; when can doing a little modification and perfect, so protection scope of the present invention is when with being as the criterion that claims were defined.
Claims (3)
1. a three-power supply automatic switching device comprises working power, first stand-by power supply, second stand-by power supply and lead-in circuit breaker Q1, the Q2 and the Q3 that link to each other with described working power, first stand-by power supply and second stand-by power supply respectively; It is characterized in that the switching value binding post of described three power supplys links to each other with host computer by the switching value input/output module; Described host computer comprises:
The Q1 module that trips monitors busbar voltage, when busbar voltage is low, thinks that working power breaks down, and described Q1 tripping operation module output Q1 trip signal disconnects working power;
Q2 combined floodgate module, when described working power lead-in circuit breaker Q1 tripping operation back and the described first stand-by power supply side voltage normal, described Q2 combined floodgate module output Q2 switching signal, the first stand-by power supply lead-in circuit breaker Q2 closure is powered by described first stand-by power supply;
Q3 combined floodgate module, when described working power lead-in circuit breaker Q1 tripping operation back and described first stand-by power supply can not normally drop into, described Q3 combined floodgate module output Q3 switching signal, the second stand-by power supply lead-in circuit breaker Q3 closure is powered by described second stand-by power supply.
2. three-power supply automatic switching device as claimed in claim 1, it is characterized in that the switching value lead-out terminal of described working power lead-in circuit breaker Q1, the first stand-by power supply lead-in circuit breaker Q2 and the second stand-by power supply lead-in circuit breaker Q3 links to each other with host computer by switching input module; State output end of described working power, first stand-by power supply and second stand-by power supply links to each other with host computer by switching input module; Described host computer links to each other by the folding lock input terminal of switching value output module and described lead-in circuit breaker Q1, Q2 and Q3.
3. three-power supply automatic switching device as claimed in claim 1 is characterized in that, described host computer is DCS system or PLC system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010186713 CN101860075A (en) | 2010-05-28 | 2010-05-28 | Three-power supply automatic switching device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010186713 CN101860075A (en) | 2010-05-28 | 2010-05-28 | Three-power supply automatic switching device |
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| CN101860075A true CN101860075A (en) | 2010-10-13 |
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| CN 201010186713 Pending CN101860075A (en) | 2010-05-28 | 2010-05-28 | Three-power supply automatic switching device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104049622A (en) * | 2014-07-03 | 2014-09-17 | 浙江大唐国际绍兴江滨热电有限责任公司 | Startup boiler control system |
| CN104917289A (en) * | 2015-06-25 | 2015-09-16 | 沈阳铝镁设计研究院有限公司 | Automatic switching method for emergency power supply and two-way working power supplies of diesel generator |
| CN107302218A (en) * | 2017-08-08 | 2017-10-27 | 内蒙古鄂尔多斯联合化工有限公司 | It is a kind of to control switchgear house with PLC |
| CN109600045A (en) * | 2018-10-25 | 2019-04-09 | 张家港市华为电子有限公司 | A kind of DC-DC converter |
| CN109840007A (en) * | 2017-11-29 | 2019-06-04 | 深圳中电长城信息安全系统有限公司 | Server redundancy power-supply system and management method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1379526A (en) * | 2001-03-29 | 2002-11-13 | 罗树林 | Monitor screen of automatic switching between three power supplies |
| CN2805177Y (en) * | 2005-06-27 | 2006-08-09 | 深圳市深泰明科技有限公司 | Low voltage c power cabinet used in intelligent transformer substation, and intelligent controller therefor |
| CN201656555U (en) * | 2010-05-28 | 2010-11-24 | 上海龙净环保科技工程有限公司 | Three-power-supply automatic switching-over device |
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2010
- 2010-05-28 CN CN 201010186713 patent/CN101860075A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1379526A (en) * | 2001-03-29 | 2002-11-13 | 罗树林 | Monitor screen of automatic switching between three power supplies |
| CN2805177Y (en) * | 2005-06-27 | 2006-08-09 | 深圳市深泰明科技有限公司 | Low voltage c power cabinet used in intelligent transformer substation, and intelligent controller therefor |
| CN201656555U (en) * | 2010-05-28 | 2010-11-24 | 上海龙净环保科技工程有限公司 | Three-power-supply automatic switching-over device |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104049622A (en) * | 2014-07-03 | 2014-09-17 | 浙江大唐国际绍兴江滨热电有限责任公司 | Startup boiler control system |
| CN104049622B (en) * | 2014-07-03 | 2017-01-11 | 浙江大唐国际绍兴江滨热电有限责任公司 | Startup boiler control system |
| CN104917289A (en) * | 2015-06-25 | 2015-09-16 | 沈阳铝镁设计研究院有限公司 | Automatic switching method for emergency power supply and two-way working power supplies of diesel generator |
| CN107302218A (en) * | 2017-08-08 | 2017-10-27 | 内蒙古鄂尔多斯联合化工有限公司 | It is a kind of to control switchgear house with PLC |
| CN109840007A (en) * | 2017-11-29 | 2019-06-04 | 深圳中电长城信息安全系统有限公司 | Server redundancy power-supply system and management method |
| CN109600045A (en) * | 2018-10-25 | 2019-04-09 | 张家港市华为电子有限公司 | A kind of DC-DC converter |
| CN109600045B (en) * | 2018-10-25 | 2021-09-03 | 张家港市华为电子有限公司 | DC-DC converter |
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Application publication date: 20101013 |