CN103683484A - Circuit switching device - Google Patents
Circuit switching device Download PDFInfo
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- CN103683484A CN103683484A CN201310749617.9A CN201310749617A CN103683484A CN 103683484 A CN103683484 A CN 103683484A CN 201310749617 A CN201310749617 A CN 201310749617A CN 103683484 A CN103683484 A CN 103683484A
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Abstract
The invention relates to multi-power supply switching technology of power supply circuits, and in particular relates to a circuit switching device. A power supply filter and B power supply filter in a power supply switching device are adjusted, the power supply filters are arranged at the incoming ends of two power supplies and before branch nodes, and an air switch is arranged behind each branch node, so that when the power supply switching device is in work, and one power supply filter is in fault, the power supply situation of the other power supply is not influenced, and even when one filter is in short-circuit or ground connection and other accidents, and the air switch of one power supply where the filter is located trips, the other power supply still can supply power to equipment in a whole cabinet, and the operation of the equipment is not influenced; and therefore, major potential safety hazard that the whole cabinet loses power supply caused by fault of single equipment is thoroughly eliminated, the safety of set and equipment is improved, and thus the service life of the equipment is prolonged and the power generation cost of power plants is reduced.
Description
Technical field
The present invention relates to many electrical source exchanges technology of supply line, especially a kind of circuit switching device.
Background technology
In each unit of power plant, usually adopt scattered control system (DCS system) to control equipment, make the formed power-supply system of each unit to reach the object of shutting down rest by interleaved power; But DCS system needs two-way AC power redundancy to be connected to system control cabinet A.C. distribution box, after A.C. distribution box switches, distribution is exported to each several part in system, and wherein DCS system needs coming from ac uninterrupted power supply in two-way AC power, i.e. UPS; Security personnel's section in another road power plant using electricity system; When normal, the alternating current input power supplying of the DPU Switching Power Supply of redundancy and the direct-current switch power supply of redundancy is taken from respectively the two-way input of A.C. distribution box redundancy, after Dang Yi road alternating current input power supplying loses, the equipment of this road alternating current input power supplying automatically switches on another road alternating current input power supplying, and then reaches work object.
In the prior art, when two-way power supply is divided into two-way after scattered control system is switched, be connected on two power-supply filters, by filter, make voltage stabilization, guarantee the stable of electric power supply system equipment; But, because power-supply filter is arranged on power supply load side, make to be short-circuited or grounding phenomenon when one of them power-supply filter, will cause the tripping operation that is short-circuited of this road power supply, electrical source exchange is in another road power supply immediately; When switching, because this filter is still in short-circuit condition, cause another road power supply that trip event also occurs, and then cause DCS rack dead electricity, further cause the unsafe accident of unit tripping or other power supply units to occur, make the electrical production environment of power plant in a kind of high-risk status, and make electric power factory equipment be subject to damage in various degree, and then promoted the cost of electrical production.
For this reason, we are badly in need of providing a kind of safe and reliable mentality of designing to power transfer device.
Summary of the invention
In order to solve the above-mentioned technical problem existing in prior art, the invention provides a kind of simple in structure, thinking is novel and can guarantee that a power-supply filter is short-circuited or during grounding phenomenon, power transfer device is switched in an other road power supply can there is not trip phenomenon, can guarantee that electrical production is in safe and reliable production environment, the circuit switching device reducing production costs.
Specifically be achieved by the following technical programs:
A kind of circuit switching device, comprise two-way power supply A and B, A road power supply and B road power supply Jun Youliangge branch, wherein A road electric power incoming line is disposed with the branch being connected with B road power supply load incoming end B ' to A road power supply load incoming end A ', and control open and-shut mode by B road power change-over switch, with A road power supply load incoming end A ' branch on be provided with A road watch-dog, A monitor and A road power change-over switch, on the watch-dog of A road, be in series with RL5 transfer relay contact in parallel with A road transfer relay, again with the parallel connection of A monitor after, be in series with again A road power change-over switch, the output of A road power change-over switch is connected with the branch that A road power supply load incoming end A ' is connected with B road power supply, B road electric power incoming line is disposed with the branch being connected with A road power supply load incoming end A ' and controls open and-shut mode by A road power change-over switch to B road power supply load incoming end B ', with B road power supply load incoming end B ' branch on be provided with B road watch-dog, B monitor and A road power change-over switch, on the watch-dog of B road, be in series with RL6 transfer relay contact in parallel with B road transfer relay, again with the parallel connection of B monitor after, be in series with again A road power change-over switch, the output of A road power change-over switch is connected with the branch that B road power supply load incoming end is connected with A road power supply, respectively at A road power supply to the A road electric power incoming line before the breakout of A road power supply load incoming end and B road power supply to the B road electric power incoming line before the breakout of B road power supply load incoming end, be provided with A road power-supply filter and B road power-supply filter, on the B road power supply load tie-in line being connected with a-power supply branch after contact with B road power supply to B road power supply load incoming end on the A road power supply load tie-in line being connected with B-source branch after contact at A road power supply to A road power supply load incoming end respectively, sky TRIP is set, effectively two power-supply filters are moved to the porch of two-way power supply, even while having like this faults such as power-supply filter is short-circuited, ground connection, this filter place one road power supply sky is opened tripping operation, another road power supply can be still whole equipment within machine cabinet power supply, the operation of not impact equipment, thoroughly eliminate the major safety risks that individual equipment fault causes whole rack power supply to lose, improved unit and device security.
Further, in order to make A monitor and the folding freely of B monitor or can folding when having fault, avoid affecting the inactive state of package unit, on described A monitor, be provided with RL3 monitor contact; On described B monitor, be provided with RL4 monitor contact.
Technique effect of the present invention is embodied in: by the structure to power transfer device, improve, the setting position of filter and empty TRIP is adjusted, even while making the accidents such as a filter is short-circuited, ground connection, this filter place one road power supply sky is opened tripping operation, another road power supply can be still whole equipment within machine cabinet power supply, the operation of not impact equipment; Thoroughly eliminate the major safety risks that individual equipment fault causes whole rack power supply to lose, improved unit and device security, and then extended the useful life of equipment, reduced the cost of power plant's electrical production, improved economic benefit.
Accompanying drawing explanation
Fig. 1 is the prior art scheme schematic diagram of circuit switching device of the present invention.
Fig. 2 is the improvement technical scheme schematic diagram of circuit switching device of the present invention.
Power-supply filter 2-B road, 1-A road power-supply filter.
Transfer relay RL6-B road, watch-dog RL3-A monitor RL4-B monitor RL5-A road, watch-dog RL2-B road, SW6-RL5 transfer relay contact R L1-A road, SW5-RL6 transfer relay contact, SW4-RL4 monitor contact, power change-over switch SW3-RL3 monitor contact, power change-over switch SW2-B road, the power supply load empty TRIP SW1-A road of incoming end SW-, power supply load incoming end B '-B road, electric power incoming line A '-A road, electric power incoming line B-B road, A-A road transfer relay.
Embodiment
Below in conjunction with concrete execution mode and accompanying drawing, technical scheme of the present invention is further elaborated, but claimed scope is not only confined to done description.
Embodiment mono-
As depicted in figs. 1 and 2, a kind of circuit switching device, comprise two-way power supply A and B, A road power supply and B road power supply Jun Youliangge branch, wherein A road electric power incoming line is disposed with the branch being connected with B road power supply load incoming end B ' to A road power supply load incoming end A ', and control open and-shut mode by B road power change-over switch SW2, with A road power supply load incoming end A ' branch on be provided with A road watch-dog RL1, A monitor RL3 and A road power change-over switch SW1, on the watch-dog RL1 of A road, be in series with RL5 transfer relay contact SW6 in parallel with A road transfer relay RL5, again with A monitor RL3 parallel connection after, be in series with again A road power change-over switch SW1, the output of A road power change-over switch SW1 is connected with the branch that A road power supply load incoming end A ' is connected with B road power supply, B road electric power incoming line is disposed with the branch being connected with A road power supply load incoming end A ' and controls open and-shut mode by A road power change-over switch SW1 to B road power supply load incoming end B ', with B road power supply load incoming end B ' branch on be provided with B road watch-dog RL2, B monitor RL4 and A road power change-over switch SW2, on the watch-dog RL2 of B road, be in series with RL6 transfer relay contact SW5 in parallel with B road transfer relay RL6, again with B monitor RL4 parallel connection after, be in series with again A road power change-over switch SW2, the output of A road power change-over switch SW2 is connected with the branch that B road power supply load incoming end B ' is connected with A road power supply, respectively at A road power supply to the A road electric power incoming line before the breakout of A road power supply load incoming end A ' and B road power supply to the B road electric power incoming line before the breakout of B road power supply load incoming end B ', be provided with A road power-supply filter 1 and B road power-supply filter 2, on the A road power supply load tie-in line being connected with B-source branch to A road power supply load incoming end A ' at A road power supply after contact respectively and load B road power supply that incoming end B ' is connected with a-power supply branch after contact of B road power supply to B road power supply load on tie-in line sky TRIP SW be set, by the structure to power transfer device, improve, the setting position of filter and empty TRIP is adjusted, even while making the accidents such as a filter is short-circuited, ground connection, this filter place one road power supply sky is opened tripping operation, another road power supply can be still whole equipment within machine cabinet power supply, the operation of not impact equipment, thoroughly eliminate the major safety risks that individual equipment fault causes whole rack power supply to lose, improved unit and device security, and then extended the useful life of equipment, reduced the cost of power plant's electrical production, improved economic benefit.
Embodiment bis-
According to embodiment mono-, in order to make A monitor and the folding freely of B monitor or can folding when having fault, avoid affecting the inactive state of package unit, on described A monitor RL3, be provided with RL3 monitor contact SW3; On described B monitor RL4, be provided with RL4 monitor contact SW4.
Embodiment tri-
As depicted in figs. 1 and 2, a kind of circuit switching device, in this device of its prior art, that a-power supply filter 1 and B road power-supply filter 2 are arranged on the power supply load incoming end after the crossing node of two circuit branch and another branch, the free SW that opens is set before Bing electric power incoming line top set node, make like this, a filter is short-circuited or earth fault, will cause an other road power supply to power normally to equipment and unit, cause equipment to be stopped transport, and then affect the work of equipment, reduce operating efficiency, also can affect the useful life of equipment, improve the cost of power plant's electrical production, reduce the economic benefit of power plant simultaneously, for this reason, the technical program is adjusted the A road power-supply filter 1 in power transfer device and B road power-supply filter 2, in the end of incoming cables of two-way power supply and power-supply filter is set before branch node, the crossing node of Zai branch arranges sky TRIP SW afterwards, and then make when this power transfer device carries out work operation, when one of them power-supply filter breaks down, can not affect the electric power thus supplied of another road power supply, even if effectively make a filter be short-circuited, during the accidents such as ground connection, this filter place one road power supply sky is opened tripping operation, another road power supply can be still whole equipment within machine cabinet power supply, the operation of not impact equipment, thoroughly eliminate the major safety risks that individual equipment fault causes whole rack power supply to lose, improved unit and device security, and then extended the useful life of equipment, reduced the cost of power plant's electrical production, improved economic benefit.
Claims (2)
1. a circuit switching device, comprise two-way power supply A and B, A road power supply and B road power supply Jun Youliangge branch, wherein A road electric power incoming line is disposed with the branch being connected with B road power supply load incoming end B ' to A road power supply load incoming end A ', and control open and-shut mode by B road power change-over switch (SW2), with A road power supply load incoming end A ' branch on be provided with A road watch-dog (RL1), A monitor (RL3) and A road power change-over switch (SW1), on A road watch-dog (RL1), be in series with RL5 transfer relay contact (SW6) in parallel with A road transfer relay (RL5), again with A monitor (RL3) parallel connection after, be in series with again A road power change-over switch (SW1), the output of A road power change-over switch (SW1) is connected with the branch that A road power supply load incoming end A ' is connected with B road power supply, B road electric power incoming line is disposed with the branch being connected with A road power supply load incoming end A ' and controls open and-shut mode by A road power change-over switch (SW1) to B road power supply load incoming end B ', with B road power supply load incoming end B ' branch on be provided with B road watch-dog (RL2), B monitor (RL4) and A road power change-over switch (SW2), on B road watch-dog (RL2), be in series with RL6 transfer relay contact (SW5) in parallel with B road transfer relay (RL6), again with B monitor (RL4) parallel connection after, be in series with again A road power change-over switch (SW2), the branch that the output of A road power change-over switch (SW2) and A road power supply and B road power supply load incoming end (B ') are connected is connected and it is characterized in that: at A road power supply, to the A road electric power incoming line before the breakout of A road power supply load incoming end (A ') and on B road power supply to the B road power supply B road electric power incoming line of loading before the breakout of incoming end (B '), be provided with A road power-supply filter (1) and B road power-supply filter (2) respectively, on the A road power supply load tie-in line being connected with B-source branch after contact at A road power supply to A road power supply load incoming end (A ') respectively and load B road power supply that incoming end (B ') is connected with a-power supply branch after contact of B road power supply to B road power supply load on tie-in line sky TRIP (SW) be set.
2. circuit switching device as claimed in claim 1, is characterized in that: on described A monitor (RL3), be provided with RL3 monitor contact (SW3); On described B monitor (RL4), be provided with RL4 monitor contact (SW4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310749617.9A CN103683484A (en) | 2013-12-31 | 2013-12-31 | Circuit switching device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310749617.9A CN103683484A (en) | 2013-12-31 | 2013-12-31 | Circuit switching device |
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| CN103683484A true CN103683484A (en) | 2014-03-26 |
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| CN201310749617.9A Pending CN103683484A (en) | 2013-12-31 | 2013-12-31 | Circuit switching device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106253450A (en) * | 2016-08-29 | 2016-12-21 | 江苏大唐国际吕四港发电有限责任公司 | A kind of power-supply system for thermal power plant's auxiliary control system |
| CN106904092A (en) * | 2017-03-27 | 2017-06-30 | 江苏万帮德和新能源科技有限公司 | Charging pile and its charging method |
| CN108183547A (en) * | 2017-12-29 | 2018-06-19 | 青岛海尔科技有限公司 | DC power-supply system and its control method |
| CN110007590A (en) * | 2019-04-16 | 2019-07-12 | 北京电子工程总体研究所 | The connection switching circuit of TT&C system and measured target and simulator |
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| CN202008935U (en) * | 2011-04-20 | 2011-10-12 | 中电投远达环保工程有限公司 | UPS (Uninterrupted Power Supply) alternating current power source type circuit breaker control loop |
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| CN201364487Y (en) * | 2008-12-31 | 2009-12-16 | 广东省电力设计研究院 | Incoming line switch control module for nuclear power station electric power plant |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106253450A (en) * | 2016-08-29 | 2016-12-21 | 江苏大唐国际吕四港发电有限责任公司 | A kind of power-supply system for thermal power plant's auxiliary control system |
| CN106904092A (en) * | 2017-03-27 | 2017-06-30 | 江苏万帮德和新能源科技有限公司 | Charging pile and its charging method |
| CN108183547A (en) * | 2017-12-29 | 2018-06-19 | 青岛海尔科技有限公司 | DC power-supply system and its control method |
| CN108183547B (en) * | 2017-12-29 | 2020-04-10 | 青岛海尔科技有限公司 | DC power supply system and control method thereof |
| CN110007590A (en) * | 2019-04-16 | 2019-07-12 | 北京电子工程总体研究所 | The connection switching circuit of TT&C system and measured target and simulator |
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Application publication date: 20140326 |