CN103383425B - Spaceborne high voltage bus universal power distribution device and measuring method thereof - Google Patents
Spaceborne high voltage bus universal power distribution device and measuring method thereof Download PDFInfo
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- CN103383425B CN103383425B CN201310269284.XA CN201310269284A CN103383425B CN 103383425 B CN103383425 B CN 103383425B CN 201310269284 A CN201310269284 A CN 201310269284A CN 103383425 B CN103383425 B CN 103383425B
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Abstract
The invention discloses a kind of spaceborne high voltage bus universal power distribution device and measuring method thereof, belong to space industry satellite power supply and distribution technical field.The inventive system comprises: power supply, main track bus-bar, negative wire bus-bar, fuse printed board, electric connector and distribution cable.Wherein the positive pole of power supply connects fuse printed board by main track bus-bar, and fuse printed board is by each load of connection of electric connector; Each load connects negative wire bus-bar by electric connector, the negative pole of negative wire bus-bar access power supply.Measuring method based on this device is: first when this device first time uses, measure the impedance initial value A of busway
0and the impedance initial value R of calibrated channel
0; Secondly the path resistance A in the use procedure of test busway and the path resistance R of calibrated channel; If | A-|R-R
0|-A
0| exceed threshold value, then have inefficacy fuse in this passage.The present invention can improve the safety of whole star service cable net.
Description
Technical field
The invention belongs to space industry satellite power supply and distribution technical field, be specifically related to a kind of power distribution equipment and measuring method thereof of spaceborne bus.
Background technology
Along with battery technology and development, the application of power supply buses on satellite of high-power is very general.The bus power supply high pressure of satellite reaches 100V, output power multikilowatt is myriawatt level even, in recent years, due to each side reasons such as design, techniques, the accident of bus load short circuits or unexpected overlap joint happens occasionally, even many in-orbit model there is the bus catastrophic failure that whole star lost efficacy because short trouble causes.
Therefore, when powering to satellite, usually need to use fuse to protect a bus, the fuse of a protection bus is positioned over the inside of each load by traditional satellite bus.Although this mode can play the effect of a protection bus, for the whole star cable of each load supplying is but in outside bus protection fuse.Whole star cable system walks line length on star, and area coverage is large, once the protection of some places is not in place, bus will be caused to transship, and this just brings greater risk for the power supply safety of whole star.
Meanwhile, because fuse is positioned over load inside, the parallel redundancy of fuse is become can not test event, and when only having fuse all to fuse, load power down could find the inefficacy of load supplying, is unfavorable for ground detection.
Summary of the invention
In view of this, the present invention proposes a kind of spaceborne high voltage bus universal power distribution device and measuring method thereof, this device can not only be protected of satellite time bus, improves the security of whole star service cable net simultaneously; Based on this device measuring method with the mode compared solve fuse in parallel can not test problem.
For achieving the above object, technical scheme of the present invention is:
A wherein spaceborne high voltage bus universal power distribution device, this device comprises: power supply, main track bus-bar, negative wire bus-bar, fuse printed board, distribution export electric connector and distribution cable;
The positive pole of power supply passes through the input end of a positive bus-bar access main track bus-bar, the output terminal of main track bus-bar connects fuse printed board by distribution cable, fuse printed board comprises multiple fuse, each fuse connects one to one to distribution and exports on the positive output node of electric connector, and each positive output node connects the input end of each load;
The negative output node exported on electric connector is connected the output terminal of each load with distribution respectively, and each negative output node connects negative wire bus-bar input end by distribution cable, and the output terminal of negative wire bus-bar passes through the negative pole of a negative busbar access power supply;
Wherein, the common port parallel connection of each fuse is welded in printed board, and the parallel connected end parallel connection connecting the fuse of same load is welded in printed board, independent welding between the parallel connected end of connection unequally loaded fuse.
Further, the rated current of the fuse used in said apparatus is 3.5A;
When connecting the low-power load of rated current I≤2.2A, then the fuse connecting this load is 2;
When connecting rated current and being in power termination within the scope of 2.2A < I < 4.5A, then the fuse connecting this load is 3;
When connecting rated current and being in the high power load within the scope of 4.5A≤I≤6.8A, then the fuse connecting this load is 4.
Further, described fuse printed board comprises miniwatt calibrated channel, middle calibration of power passage and high-power calibrated channel further;
Its middle low power calibrated channel comprises the fuse of the 3.5A of 2 short circuits, and the common port of each fuse and the equal parallel connection of parallel connected end are welded, and the fuse of these 2 short circuits connects one to one to the positive output node of distribution output electric connector;
Wherein middle calibration of power passage comprises the fuse of the 3.5A of 3 short circuits, and the common port of each fuse and the equal parallel connection of parallel connected end are welded, and the fuse of these 3 short circuits connects one to one to the positive output node of distribution output electric connector;
Wherein high-power calibrated channel comprises the fuse of the 3.5A of 4 short circuits, and the common port of each fuse and the equal parallel connection of parallel connected end are welded, and the fuse of these 4 short circuits connects one to one to the distribution output node of distribution output electric connector.
The wherein detection method of spaceborne high voltage bus universal power distribution device, the one spaceborne high voltage bus universal power distribution device that this detection method provides for such scheme, the method comprises the steps:
As such scheme the one spaceborne high voltage bus universal power distribution device that provides, wherein corresponding for each load positive pole by power supply is defined as busway to the current channel of negative pole;
Step 1, when this device first time uses, select a road busway to measure, measure the path resistance of selected busway anode, as first time test data, i.e. initial value A
0;
Judge that the loading condition that institute's routing busway connects determines selected calibrated channel: if during the low-power load of the load connected as rated current I≤2.2A, then the path resistance measuring miniwatt calibrated channel is designated as R
0; If during the middle power termination that the load connected is rated current to be within the scope of 2.2A < I < 4.5A, then in measuring, the path resistance of calibration of power passage is designated as R
0; If during the high power load that the load connected is rated current is within the scope of 4.5A≤I≤6.8A, then the path resistance measuring high-power calibrated channel is designated as R
0;
Step 2, to test the calibrated channel of selected busway and its correspondence, and the path resistance of this busway anode test obtained is designated as A, the path resistance of selected calibrated channel is designated as R;
The systematic error of step 3, computation and measurement | R-R
0|;
Step 4, setting threshold value as defective criterion, if measured value A deducts the result after systematic error and initial value A
0difference exceed defective criterion, then judge to there is inefficacy fuse in busway.
Preferably, the establishing method of the defective criterion in described step 4 is:
If selected calibrated channel is high-power calibrated channel, then defective criterion is: 0.95m Ω;
If selected calibrated channel is middle calibration of power passage, then defective criterion is: 1.90m Ω;
If selected calibrated channel is miniwatt calibrated channel, then defective criterion is: 5.70m Ω.
Beneficial effect:
1, satellite bus power protection fuse moves forward by this device; fuse is made no longer to be placed in load inside; this design not only adds the security of a bus in system level; whole star cable system can also be made to be within the protection domain of fuse equally; improve the security that whole star is powered, reduce the risk of bus to casing short circuit.This device can adapt to the protection demand of the load of different capacity on satellite power supply by the design of fuse, when the load, only need carry out wire jumper between fuse.
2, this apparatus design calibrated channel can to provide the measurement of systematic error, for the inefficacy verification of fuse provides possibility.
3, the present invention proposes the fuse inefficacy method of calibration for said apparatus simultaneously, compared by the test value that the initial value of early detection and test process are obtained, accurately can judge the fuse failure conditions of busway, the complete machine solving fuse in parallel can not survey problem, improves reliability and security that whole star powers.
Accompanying drawing explanation
High voltage bus universal power distribution structure drawing of device described in Fig. 1 embodiment of the present invention 1;
High voltage bus universal power distribution structure drawing of device described in Fig. 2 embodiment of the present invention 3.
Embodiment
To develop simultaneously embodiment below in conjunction with accompanying drawing, describe the present invention.
Embodiment 1
The invention provides a kind of spaceborne high voltage bus universal power distribution device to comprise: power supply, main track bus-bar, negative wire bus-bar, fuse printed board, distribution export electric connector and distribution cable.Concrete structure connects as shown in Figure 1.
By the input end of the positive pole of power supply by a positive bus-bar access main track bus-bar, the output terminal of main track bus-bar connects fuse printed board by distribution cable, fuse printed board comprises multiple fuse, each fuse connects one to one to distribution and exports on the positive output node of electric connector, and each positive output node connects the input end of each load.
The negative output node exported on electric connector is connected the output terminal of each load with distribution respectively, and each negative output node connects negative wire bus-bar input end by distribution cable, and the output terminal of negative wire bus-bar passes through the negative pole of a negative busbar access power supply.
According to above annexation, the flow direction of distribution electric current is: distribution electric current is exported by a positive bus-bar by the positive pole of power supply, fuse in printed board flows to distribution and exports electric connector, and exports the positive output node-flow of electric connector to load by distribution; The negative output node that distribution electric current exports electric connector by distribution after overload directly gets back to power supply negative terminal.As can be seen here, in this device, the positive pole of the corresponding route power supply of each load is to the current channel of negative pole, and this passage is the busway of this load.
This device can be with multiple load; the busway of each load uses the fuse of different quantity to protect; the common port parallel connection of each fuse is welded in fuse printed board; wherein connect the parallel connected end parallel connection welding of the fuse of same load; independent welding between the parallel connected end of connection unequally loaded fuse, the fuse parallel connected end namely belonging to same busway is in parallel.
Such as suppose to employ three fuses in the busway of this device institute bringing onto load one, then these three fuse parallel connected end parallel connection welding; And the busway of load two employs two fuses, each is all separate with three fuse parallel connected end of load one for these two fuses, and these two fuse parallel connected end parallel connection welding.
Embodiment 2
In this device, the quantity of the fuse in fuse printed board, need to determine according to the load-carrying situation of this device institute, concrete condition is corresponding as follows: for the difference of bearing power, the coupling fuse quantity difference that each load is corresponding, when the rated current of fuse is 3.5A, there is following situation:
When connecting the low-power load of rated current I≤2.2A, then the fuse connecting this load is 2, employs 2 fuses in the busway that namely this load is corresponding;
When connecting rated current and being in power termination within the scope of 2.2A < I < 4.5A, then the fuse connecting this load is 3, employs 2 fuses in the busway that namely this load is corresponding;
When connecting rated current and being in the high power load within the scope of 4.5A≤I≤6.8A, then the fuse connecting this load is 4, employs 4 fuses in the busway that namely this load is corresponding.
This sorting technique covers all loading conditions of current satellite.
The load-carrying situation of device is analyzed, selects the fuse of respective numbers.Such as, suppose that this device institute bringing onto load situation is: to merely hit power termination and 2 high power loads with 5 low-power loads, 4, then in the fuse printed board of this device, the quantity of required fuse is 30.
Connect according to this device institute parallel connected end of load-carrying situation to the fuse in fuse printed board simultaneously, the fuse parallel connected end of same for correspondence load use wire is connected to form busway.The corresponding road busway of each load.Namely, in the present embodiment, 30 fuses are connected to form 11 road busways, corresponding 11 loads respectively, wherein 2 fuse parallel connected end are connected to form the busway of a corresponding low-power load, 3 fuse parallel connected end are connected to form the busway of power termination in a correspondence, and 4 fuse parallel connected end are connected to form the busway of a corresponding high power load.
For different loading conditions, use the fuse of varying number, like this can by the wire jumper between fuse to adapt to the protection requirement of different capacity load, when the load, by carrying out wire jumper and load-adaptable change between fuse.
Embodiment 3
On the basis of embodiment 1, the present embodiment has three road calibrated channels further, comprise miniwatt calibrated channel, middle calibration of power passage and high-power calibrated channel, this three roads calibrated channel is used for carrying out low-power load path, middle power termination path and high power load path the calibration of systematic error respectively.Its middle low power calibrated channel and high-power calibrated channel are as shown in Figure 2.
Its middle low power calibrated channel comprises the fuse of the 3.5A of 2 short circuits, and the common port of each fuse and the equal parallel connection of parallel connected end are welded, and the fuse of these 2 short circuits connects one to one to the positive output node of distribution output electric connector;
Wherein middle calibration of power passage comprises the fuse of the 3.5A of 3 short circuits, and the common port of each fuse and the equal parallel connection of parallel connected end are welded, and the fuse of these 3 short circuits connects one to one to the positive output node of distribution output electric connector;
Wherein high-power calibrated channel comprises the fuse of the 3.5A of 4 short circuits, and the common port of each fuse and the equal parallel connection of parallel connected end are welded, and the fuse of these 4 short circuits connects one to one to the positive output node of distribution output electric connector.
Wherein the short circuit of fuse refers to common port and the parallel connected end short circuit of fuse.
Due in calibrated channel, fuse is all short circuit, and the process path resistance of so testing be considered as constant, but due to the impact of systematic error, if there is variable quantity in the path resistance of once testing alignment passage compared to initial testing value, then think that this variable quantity is systematic error.
The design of the present embodiment can expression system error exactly, for the error judgment of test process provides foundation.
Embodiment 4
For the spaceborne high voltage bus universal power distribution device that embodiment 2 proposes, invention also provides a kind of measuring method for this device, first corresponding for each load positive pole by power supply is defined as busway to the current channel of negative pole; Then the method is specific as follows:
Step 1, obtain spaceborne high voltage bus universal power distribution device according to the structure described by embodiment 2, wherein in power distribution equipment, all corresponding positive pole by power supply of each load, to the current channel of negative pole, is designated as busway;
When device first time uses, select a road busway to measure, measure the path resistance of selected busway anode, as first time test data, i.e. initial value A
0;
Judge that the loading condition that institute's routing busway connects determines selected calibrated channel: if the rated current I of the load connected≤2.2A, then select miniwatt calibrated channel, the path resistance measuring miniwatt calibrated channel is designated as R
0; If the rated current of the load connected is within the scope of 2.2A < I < 4.5A, then calibration of power passage in selecting, in measurement, the path resistance of calibration of power passage is designated as R
0; If the rated current of the load connected is within the scope of 4.5A≤I≤6.8A, then select high-power calibrated channel, the path resistance measuring high-power calibrated channel is designated as R
0;
In the present embodiment, service precision is better than the impedance of the selected distribution path of milliohmmeter measurement of 0.01m Ω.
Step 2, to test the calibrated channel of selected busway and its correspondence, and the path resistance of this busway anode test obtained is designated as A, the path resistance of selected calibrated channel is designated as R; ;
The systematic error of step 3, computation and measurement | R-R
0|;
Step 4, setting threshold value as defective criterion, actual defective criterion is set time should arrange, if measured value A deducts the systematic error of this test according to each measurement result appropriateness | R-R
0| after result and initial value A
0difference exceed defective criterion, then judge, in i-th test, in this road busway, to there is inefficacy fuse, otherwise judge that the fuse of busway is working properly.。
When testing the positive terminal impedance of selected busway, the systematic error that measured value deducts this test can express the test value of the positive terminal impedance of this busway, and the positive terminal impedance of this busway that initial value is surveyed when being and using this device first time, the normal value of this busway can be expressed, test value should fluctuate in the certain limit of normal value, if exceed this scope, thinks and has fuse to lose efficacy in this busway.
Under obtaining different calibrated channel by many experiments in the present embodiment, the setting of different defective criterion:
If selected calibrated channel is high-power calibrated channel, then defective criterion is: 0.95m Ω;
If selected calibrated channel is middle calibration of power passage, then defective criterion is: 1.90m Ω;
If selected calibrated channel is miniwatt calibrated channel, then defective criterion is: 5.70m Ω.
In sum, these are only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (3)
1. a spaceborne high voltage bus universal power distribution device, it is characterized in that, this device comprises: power supply, main track bus-bar, negative wire bus-bar, fuse printed board, distribution export electric connector and distribution cable;
The positive pole of power supply passes through the input end of a positive bus-bar access main track bus-bar, the output terminal of main track bus-bar connects fuse printed board by distribution cable, fuse printed board comprises multiple fuse, each fuse connects one to one and exports on the positive output node of electric connector to distribution, and the positive output node of each distribution output electric connector connects the input end of each load;
The output terminal of each load exports electric connector respectively negative output node with distribution is connected, the negative output node that each distribution exports electric connector connects negative wire bus-bar input end by distribution cable, and the output terminal of negative wire bus-bar passes through the negative pole of a negative busbar access power supply;
Wherein, the common port parallel connection of each fuse is welded in printed board, and the parallel connected end parallel connection connecting the fuse of same load is welded in printed board, independent welding between the parallel connected end of connection unequally loaded fuse;
The rated current of described fuse is 3.5A;
When connecting the low-power load of rated current I≤2.2A, then the fuse connecting this load is 2;
When connecting rated current and being in power termination within the scope of 2.2A < I < 4.5A, then the fuse connecting this load is 3;
When connecting rated current and being in the high power load within the scope of 4.5A≤I≤6.8A, then the fuse connecting this load is 4;
Described fuse printed board comprises miniwatt calibrated channel, middle calibration of power passage and high-power calibrated channel further;
Its middle low power calibrated channel comprises the fuse of the 3.5A of 2 short circuits, and the common port of each fuse and the equal parallel connection of parallel connected end are welded, and the fuse of these 2 short circuits connects one to one to the positive output node of distribution output electric connector;
Wherein middle calibration of power passage comprises the fuse of the 3.5A of 3 short circuits, and the common port of each fuse and the equal parallel connection of parallel connected end are welded, and the fuse of these 3 short circuits connects one to one to the positive output node of distribution output electric connector;
Wherein high-power calibrated channel comprises the fuse of the 3.5A of 4 short circuits, and the common port of each fuse and the equal parallel connection of parallel connected end are welded, and the fuse of these 4 short circuits connects one to one to the positive output node of distribution output electric connector.
2. a detection method for spaceborne high voltage bus universal power distribution device as claimed in claim 1, it is characterized in that, the method comprises the steps:
Corresponding for each load positive pole by power supply is defined as busway to the current channel of negative pole;
Step 1, when device first time uses, select a road busway to measure, measure the path resistance of selected busway anode, as first time test data, i.e. initial value A
0;
Judge that the loading condition that institute's routing busway connects determines selected calibrated channel: if during the low-power load of the load connected as rated current I≤2.2A, then the path resistance measuring miniwatt calibrated channel is designated as R
0; If during the middle power termination that the load connected is rated current to be within the scope of 2.2A < I < 4.5A, then in measuring, the path resistance of calibration of power passage is designated as R
0; If during the high power load that the load connected is rated current is within the scope of 4.5A≤I≤6.8A, then the path resistance measuring high-power calibrated channel is designated as R
0;
Step 2, to test the calibrated channel of selected busway and its correspondence, and the path resistance of this busway anode test obtained is designated as A, the path resistance of selected calibrated channel is designated as R;
The systematic error of step 3, computation and measurement | R-R
0|;
Step 4, setting threshold value as defective criterion, if measured value A deducts the result after systematic error and initial value A
0difference exceed defective criterion, then judge to there is inefficacy fuse in busway.
3. the detection method of a kind of spaceborne high voltage bus universal power distribution device as claimed in claim 2, it is characterized in that, the establishing method of the defective criterion in described step 4 is:
If selected calibrated channel is high-power calibrated channel, then defective criterion is: 0.95m Ω;
If selected calibrated channel is middle calibration of power passage, then defective criterion is: 1.90m Ω;
If selected calibrated channel is miniwatt calibrated channel, then defective criterion is: 5.70m Ω.
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| CN201310269284.XA CN103383425B (en) | 2013-06-28 | 2013-06-28 | Spaceborne high voltage bus universal power distribution device and measuring method thereof |
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| CN103383425B true CN103383425B (en) | 2016-01-20 |
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| CN108509730A (en) * | 2018-04-04 | 2018-09-07 | 北京长城华冠汽车技术开发有限公司 | The model conducting wire of automobile-used overload protection arrangement automatically selects matching process and system |
| CN112698135A (en) * | 2020-12-22 | 2021-04-23 | 上海卫星工程研究所 | Detection system and method for satellite loading test of satellite power supply and distribution system |
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