CN101800401A - Power supply and distribution methods of low-voltage system - Google Patents
Power supply and distribution methods of low-voltage system Download PDFInfo
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- CN101800401A CN101800401A CN200910058303A CN200910058303A CN101800401A CN 101800401 A CN101800401 A CN 101800401A CN 200910058303 A CN200910058303 A CN 200910058303A CN 200910058303 A CN200910058303 A CN 200910058303A CN 101800401 A CN101800401 A CN 101800401A
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Abstract
The invention belongs to the field of power supply and distribution of low-voltage systems and solves the problem that the current-carrying capacities of main cables or main busbars are not reasonably matched with the passing current in the full path in the mode that a power supply circuit is connected with a plurality of electrical units. The system adopts the mode that the main cables or main busbars with different sectional areas are connected according to stepped variation of the current-carrying capacities and is provided with one-circuit sectional variable diameter main cables or main busbars. The main cables or main busbars are connected with a plurality of electrical units. The current-carrying capacities of the cables or busbars are reasonably matched with the passing current on the whole sections of the main cables or main busbars. Meanwhile, secondary circuit breakers are arranged on the variable diameter parts of the main cables or main busbars and are used for sectional protection of the cables or busbars with different current-carrying capacities in the same circuit together with a main circuit breaker. In the method, the main and secondary circuit breakers act timely when the main cables or main busbars have faults while the materials and the manufacturing cost are saved, not only the requirement of power supply reliability is satisfied, but also the fault range is accurately judged so as to be convenient for rush repair.
Description
Technical field
The present invention relates to a kind of low-voltage power supply and distribution system technical field.
Background technology
In the known technology, adopt a current supply circuit to connect in the mode of a plurality of power units as the low-voltage power supply mode, be divided into following three kinds: a kind of for the outlet circuit breaker connects a pre-branched cable, each branch cable connects a plurality of power units; Another kind of each branch cable is connected on the leader cable by penetrating cable clamp for the outlet circuit breaker connects a leader cable, and each branch cable connects a plurality of power units; The third connects concentration bus duct one time for the outlet circuit breaker, and the jack switch case is connected with bus each branch cable on the bus duct by being plugged on, and each branch cable connects a plurality of power units.
The weak point of above supply power mode is, the basis of leader cable or main bus bar sectional area is connected to the summation of power unit load on leader cable or the main busbar for all, pass through rationally on this basis, calculate accurately, finally determine the sectional area of leader cable or main bus bar.Be far longer than the sectional area of each branch cable like this with regard to the sectional area that has caused leader cable or main busbar, branch cable is many more, and it is big more that both sectional areas differ.
For the distribution of electric current on leader cable or main busbar, be unbalanced, the closer to the power supply circuit breaker, big more by the electric current on leader cable or the main busbar, otherwise, far away more from the power supply circuit breaker, more little by the electric current on leader cable or the main busbar, do not hold until leader cable or main busbar, by the electric current on leader cable or the main busbar be tending towards equating by the electric current of not holding branch cable.
In above-described known technology, the sectional area of leader cable or main bus bar is not accomplished fully with the electric current that is passed through, is reasonably mated.In the ordinary course of things, the ampacity on very big one section leader cable or the main busbar is the current value that passes through greater than its inside.Clearly, the supply power mode in the known technology exists some not exclusively reasonable, some uneconomic factors.Under the situation that current pre-branched cable, concentration bus duct and penetrating cable clamp are widely used, at non-ferrous metal, especially under the situation that the copper valency grows to even greater heights, its uneconomic factor has just more loomed large.
Summary of the invention
Purpose of the present invention, be to provide a kind of power supply and distribution method for low-voltage system, carry out ways of connecting by adopting different cross-sectional leader cable or main busbar to change, well solved leader cable or main busbar ampacity and its problem by the electric current rational Match by the ampacity step.This system's tool is segmentation reducing leader cable or main bus bar once; on leader cable or main bus bar, connect a plurality of power units; the electric current that the ampacity of cable or busbar (sectional area) passes through with it on leader cable or the full section of main busbar all rationally mates; simultaneously establish some secondary circuit breakers at leader cable or main bus bar reducing place; be used for doing different ampacity cables or segmentation control and the protection of busbar in same loop, connect with electric power system by main circuit breaker at last.The method is in economical with materials, when saving cost, in the time of guaranteeing that again leader cable or main busbar break down, in time move main circuit breaker and each secondary circuit breaker subregion, maximum magnitude reduce power supply interrupted district, improve the continuity and the reliability of system works greatly, satisfied the requirement of power supply reliability.By control cable, secondary circuit breaker and main circuit breaker control system or supervisory control system are linked, can also accurately judge line fault scope, easy access.
Therefore, an object of the present invention is to provide a kind of power supply and distribution method for low-voltage system, it is characterized in that this method comprises: the main circuit breaker switch feeds out leader cable one time, one end of one time or many times branch cables is connected on the leader cable another termination branch circuit breaker of this branch cable by penetrating cable clamp; Be punctured the leader cable that the leader cable after the connection diminishes through secondary circuit breaker stube cable sectional area, an end of another time or many times branch cables is connected on the leader cable after sectional area diminishes by penetrating cable clamp, another termination branch circuit breaker of this branch cable; Connected by the said equipment, components and parts, cable, constitute to be changed by step by the cable of different cross-sectional (ampacity) and connect, segmentation reducing leader cable is to the power supply-distribution system of a plurality of branches power unit.
Like this, carry out ways of connecting, well solved the problem that the current-carrying capacity of cable and the cross-section of cable amass rational Match on leader cable by adopting the different cross-sectional leader cable to change by step.
Another object of the present invention provides a kind of power supply and distribution method for low-voltage system, and it is characterized in that this method comprises: the main circuit breaker switch feeds out pre-branched cable one time, and the branch cable of pre-branched cable connects branch circuit breaker; The leader cable of pre-branched cable connects the pre-branched cable that the leader cable sectional area diminishes through secondary circuit breaker, and the branch cable of this pre-branched cable connects branch circuit breaker; Connected by the said equipment, components and parts, cable, constitute by the different pre-branched cable of leader cable sectional area, change by leader cable ampacity step and connect, segmentation reducing pre-branched cable is to the power supply-distribution system of a plurality of branches power unit.
Like this, the connected mode of the leader cable segmentation reducing by pre-branched cable has well solved the problem that the current-carrying capacity of cable and the cross-section of cable amass rational Match on the pre-branched cable leader cable.
Another purpose of the present invention provides a kind of power supply and distribution method for low-voltage system, and it is characterized in that this method comprises: the main circuit breaker switch feeds out bus duct one time, and one time or many reuses electric unit are connected on the bus duct busbar by the jack switch case; Connected the bus duct that the busbar sectional area diminishes by the bus duct after pegging graft through secondary circuit breaker, another time or many reuses electric unit are connected on the bus duct busbar after sectional area diminishes by the jack switch case; Connected by the said equipment, components and parts, bus duct, constitute to be changed by step by different cross-sectional (ampacity) bus duct and connect, segmentation reducing bus duct is to the power supply-distribution system of a plurality of branches power unit.
Like this,, change by step and carry out ways of connecting, well solved the problem of bus duct busbar ampacity and bus duct busbar sectional area rational Match by adopting the different bus duct of busbar sectional area.
More than three kinds of methods, it is the processing that connects a plurality of power units at distribution loop in the known technology, no matter be that leader cable or bus duct connect a plurality of power units by penetrating cable clamp, still connect a plurality of power units by pre-branched cable, or connect a plurality of power units by the jack switch case, can both accomplish that the current-carrying capacity of cable and the cross-section of cable amass on the leader cable or busbar ampacity and the rational Match of busbar sectional area on busbar.
Each secondary circuit breaker can have control cable to be connected to main circuit breaker control protected location or supervisory control system; any one circuit breaker would trip; can send corresponding alarm signal; thereby when leader cable circuit or busbar are carried out reliably protecting; be convenient to find the fault zone, reduce the time of trouble hunting.Also can install the current monitoring unit additional at primary and secondary level circuit breaker place; and electric current and breaker signal delivered to supervisory control system by control cable; whole system is carried out intelligent monitoring; when one section leader cable or busbar current value surpass this section circuit breaker setting value and protection operation time limit; this circuit breaker trip also sends corresponding alarm signal to supervisory control system; supervisory control system also can be carried out divide-shut brake control to corresponding circuit breaker according to running situation; primary and secondary level circuit breaker can form electrode difference protection, thereby leader cable circuit or bus duct are carried out reliable protection.
Can determine faulty section leader cable or busbar from the control protected location of main circuit breaker or the alarm signal on the supervisory control system, thereby find the fault point fast, be convenient to timely processing, guarantee the power supply-distribution system reliability of operation.
The control protected location or the supervisory control system of main circuit breaker have the multiple signals input/output interface; can monitor the real-time current value of the cable or the busbar of a plurality of different cross sections on same leader cable or the busbar as required simultaneously; the control protected location or the supervisory control system of main circuit breaker also can have the protection setting function; after the current value that passes through in a certain section cable or the busbar surpasses the setting value and protection operation time limit of this section cable or busbar; the current monitoring unit sends corresponding alarm signal and trip signal is reached the control unit of the control circuit breaker of this section; after the control unit of each circuit breaker receives trip signal, the circuit breaker would trip.According to alarm signal and information, decidable faulty section cable or bus so that in time handle, thereby have improved the automaticity of system, have realized intelligent monitoring.
The control protected location of main circuit breaker also can unite two into one with existing multifunction power table, saves cost.
Supervisory control system also can be replaced by intelligent monitor system, saves cost.
In the above-described distribution method, used cable can be single core, multicore cable or lead, and busbar can be a monolithic, also can be multi-disc.Mainly be to require reasonably to select according to the place and the distribution that use.
Below with reference to the accompanying drawing as the example preferred embodiment of the present invention, it is novel feature and the further aim of the present invention and the beneficial effect of characteristic of the present invention that description is construed to.
But should be fully understood that accompanying drawing only is used for example and explanation, not want definition as the present invention's restriction.
Description of drawings
Fig. 1 is the distribution schematic diagram 1 of segmentation reducing leader cable to a plurality of power units;
Fig. 2 is the distribution schematic diagram 2 of segmentation reducing leader cable to a plurality of power units;
Fig. 3 is the distribution schematic diagram of segmentation reducing pre-branched cable to a plurality of power units;
Fig. 4 is the distribution schematic diagram of segmentation reducing concentration bus duct to a plurality of power units;
Embodiment:
Specify embodiments of the present invention below in conjunction with accompanying drawing.
Shown in Fig. 1 the distribution schematic diagram 1 of the segmentation reducing leader cable of embodiment to a plurality of power units.In this distribution embodiment, main circuit breaker switch 1 feeds out leader cable 2 one time from power supply, one end of one time or many times branch cable 4 is connected on the leader cable 2 by penetrating cable clamp 3, another termination branch circuit breaker 5 of this branch cable 4, and this branch circuit breaker 5 connects power load 6; Be punctured the leader cable 8 that the leader cable 2 after wire clamp 3 branches diminishes through secondary circuit breaker 7 stube cable sectional areas, one end of another time or many times branch cables 10 is connected on the leader cable 8 after sectional area diminishes by penetrating cable clamp 9, another termination branch circuit breaker 11 of this branch cable 10, this branch circuit breaker 11 connects power load 12.When any section leader cable broke down, this section killer switch can both in time be protected action, thereby made whole circuit obtain complete protection.
Shown in Fig. 2 the distribution schematic diagram 2 of the segmentation reducing leader cable of embodiment to a plurality of power units.In this distribution embodiment, main circuit breaker switch 1 feeds out leader cable 2 one time from power supply, one end of one time or many times branch cable 4 is connected on the leader cable 2 by penetrating cable clamp 3, another termination branch circuit breaker 5 of this branch cable 4, and this branch circuit breaker 5 connects power load 6; Be punctured the leader cable 8 that the leader cable 2 after wire clamp 3 branches diminishes through secondary circuit breaker 7 stube cable sectional areas, one end of another time or many times branch cables 10 is connected on the leader cable 8 after sectional area diminishes by penetrating cable clamp 9, another termination branch circuit breaker 11 of this branch cable 10, this branch circuit breaker connects power load 12.
Simultaneously, the long-pending leader cable 8 that diminishes of the cross-section of cable is through the leader cable 16 of secondary circuit breaker 15 stube cable sectional area minimums, one end of one time or many times branch cable 18 is connected on the leader cable 16 after sectional area diminishes by penetrating cable clamp 17, another termination branch circuit breaker 19 of this branch cable 18, this branch circuit breaker connects power load 20;
Main circuit breaker 1 and secondary circuit breaker 7,15 by control cable 13, are connected to supervisory control system 14 respectively.When any section leader cable breaks down; this section killer switch can both in time be protected action and folding lock signal is delivered to supervisory control system; thereby make whole circuit obtain complete protection; simultaneously can be from the demonstration of supervisory control system 14; the faulty section cable forms a prompt judgement; in time handling failure restores electricity.
Fig. 3 is the distribution schematic diagram of segmentation reducing pre-branched cable to a plurality of power units; In this distribution embodiment, main circuit breaker switch 1 feeds out pre-branch leader cable 2 one time from power supply, and the branch cable 4 of pre-branch leader cable 2 connects branch circuit breaker 5, and branch circuit breaker 5 connects power load 6; The pre-branched cable leader cable 8 that pre-branch leader cable 2 diminishes through secondary circuit breaker 7 stube cable sectional areas, corresponding one time or many times branch cables 10 connect branch circuit breaker 11, and this branch circuit breaker 11 connects power load 12;
Main circuit breaker 1 and secondary circuit breaker 7 have control cable 13 to be connected to supervisory control system 14 respectively.When the pre-branch of any section leader cable broke down, each segment protect circuit breaker 1,7 can both in time be protected action, thereby makes whole circuit obtain complete protection; simultaneously can be from the demonstration of supervisory control system 14; the form a prompt judgement faulty section of pre-branched cable, in time handling failure restores electricity.
Wherein pre-branched cable connector 3,9 is intrinsic an of pre-branched cable, works to connect leader cable and branch cable in the pre-branched cable.
Fig. 4 is the distribution schematic diagram of segmentation reducing bus duct to a plurality of power units; Main circuit breaker switch 1 feeds out bus duct 2, one times or many reuses electric loading 4 is connected on the bus duct 2 by jack switch case 3 from power supply; Connected the bus duct 6 that main busbar sectional area diminishes by the bus duct 2 after pegging graft through secondary circuit breaker 5, another time or many reuses electric loading 8 are connected on the bus duct 6 after sectional area diminishes by jack switch case 7; Main circuit breaker 1 and secondary circuit breaker 5 have control cable 9 to be connected to supervisory control system 10.When any section bus duct broke down, each section killer switch 1 or 5 can both in time be protected action, thereby makes whole circuit obtain complete protection; simultaneously can be from the demonstration of monitoring and protection unit 10; the faulty section bus duct that forms a prompt judgement, in time handling failure restores electricity.
Claims (9)
1. power supply and distribution method for low-voltage system is characterized in that this method comprises:
The main circuit breaker switch feeds out leader cable one time, and an end of a time or many times branch cables is connected on the leader cable another termination branch circuit breaker of this branch cable by penetrating cable clamp; Be punctured the leader cable that the leader cable after the connection diminishes through secondary circuit breaker stube cable sectional area, an end of another time or many times branch cables is connected on the leader cable after sectional area diminishes by penetrating cable clamp, another termination branch circuit breaker of this branch cable; Connected by the said equipment, components and parts, cable, constitute to be changed by step by the cable of different cross-sectional (ampacity) and connect, segmentation reducing leader cable is to the power supply-distribution system of a plurality of branches power unit.
2. power supply and distribution method for low-voltage system is characterized in that this method comprises:
The main circuit breaker switch feeds out pre-branched cable one time, and the branch cable of pre-branched cable connects branch circuit breaker; The leader cable of pre-branched cable connects the pre-branched cable that the leader cable sectional area diminishes through secondary circuit breaker, and the branch cable of this pre-branched cable connects branch circuit breaker; Connected by the said equipment, components and parts, cable, constitute by the different pre-branched cable of leader cable sectional area, change by leader cable ampacity step and connect, segmentation reducing pre-branched cable is to the power supply-distribution system of a plurality of branches power unit.
3. power supply and distribution method for low-voltage system is characterized in that this method comprises:
The main circuit breaker switch feeds out bus duct one time, and one time or many reuses electric unit are connected on the bus duct busbar by the jack switch case; Connected the bus duct that the busbar sectional area diminishes by the bus duct after pegging graft through secondary circuit breaker, another time or many reuses electric unit are connected on the bus duct busbar after sectional area diminishes by the jack switch case; Connected by the said equipment, components and parts, bus duct, constitute to be changed by step by different cross-sectional (ampacity) bus duct and connect, segmentation reducing bus duct is to the power supply-distribution system of a plurality of branches power unit.
4. according to claim 1, claim 2, the said power supply and distribution method for low-voltage system of claim 3, it is characterized in that described secondary circuit breaker can be 1 and more than.
5. according to claim 1, claim 2, the said power supply and distribution method for low-voltage system of claim 3; it is characterized in that described primary and secondary level circuit breaker can have control cable to connect with supervisory control system; realize intelligent monitoring, to satisfy the requirement of remote monitoring and protection.
6. according to claim 1, claim 2, the said power supply and distribution method for low-voltage system of claim 3, it is characterized in that described secondary circuit breaker can adopt and has circuit breaker or Based Intelligent Control and the protection switch electrical equipment such as KBO, CPS that cut-off function.
7. according to claim 1, claim 2, the said power supply and distribution method for low-voltage system of claim 3; it is characterized in that described secondary circuit breaker also can adopt the device for switching and the current monitoring unit matching of isolating switch, on-load switch or similar functions; come cable or bus duct are carried out folding and protection control; the current monitoring unit has control cable and main circuit breaker control system or supervisory control system to link; to guarantee in time to disconnect main circuit breaker, guarantee the safe operation of circuit to the monitoring of all circuit running statuses with when the line fault.
8. according to claim 1, the said power supply and distribution method for low-voltage system of claim 2, it is characterized in that described cable can be single core, multicore cable or lead.
9. according to claim 1, claim 2, the said power supply and distribution method for low-voltage system of claim 3, it is characterized in that to connect a plurality of duplexures on same section leader cable that described cross section is constant or the main bus bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910058303A CN101800401A (en) | 2009-02-10 | 2009-02-10 | Power supply and distribution methods of low-voltage system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910058303A CN101800401A (en) | 2009-02-10 | 2009-02-10 | Power supply and distribution methods of low-voltage system |
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| CN101800401A true CN101800401A (en) | 2010-08-11 |
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| CN200910058303A Pending CN101800401A (en) | 2009-02-10 | 2009-02-10 | Power supply and distribution methods of low-voltage system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103779685A (en) * | 2014-02-24 | 2014-05-07 | 浙江昱能科技有限公司 | Cable connector suitable for being connected with distributed power source |
| CN104300375A (en) * | 2014-09-28 | 2015-01-21 | 长江勘测规划设计研究有限责任公司 | Crystalline silicon photovoltaic power station large-distance-difference direct current combination cable differentiation configuration method |
-
2009
- 2009-02-10 CN CN200910058303A patent/CN101800401A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103779685A (en) * | 2014-02-24 | 2014-05-07 | 浙江昱能科技有限公司 | Cable connector suitable for being connected with distributed power source |
| CN103779685B (en) * | 2014-02-24 | 2016-10-05 | 浙江昱能科技有限公司 | It is applicable to connect the cable connector of distributed power source |
| CN104300375A (en) * | 2014-09-28 | 2015-01-21 | 长江勘测规划设计研究有限责任公司 | Crystalline silicon photovoltaic power station large-distance-difference direct current combination cable differentiation configuration method |
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Application publication date: 20100811 |