CN103383425A - Satellite-borne general power distribution device for high voltage bus and measuring method thereof - Google Patents
Satellite-borne general power distribution device for high voltage bus and measuring method thereof Download PDFInfo
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- CN103383425A CN103383425A CN201310269284XA CN201310269284A CN103383425A CN 103383425 A CN103383425 A CN 103383425A CN 201310269284X A CN201310269284X A CN 201310269284XA CN 201310269284 A CN201310269284 A CN 201310269284A CN 103383425 A CN103383425 A CN 103383425A
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Abstract
The invention discloses a satellite-borne general power distribution device for a high voltage bus and a measuring method thereof and belongs to the technical field of satellite power supply and distribution in the spaceflight field. The device comprises a power supply, a positive wire busbar, a negative wire burbar, a fuse printed board, electric connectors and a power distribution cable. A positive pole of the power supply is connected with the positive wire busbar through the fuse printed board, the fuse printed board is connected with all loaders through the electric connectors, all loaders are connected with the negative wire busbar through the electric connectors, and the negative wire busbar is connected with a negative pole of the power supply. The measuring method based on the device comprises the steps that an impedance initial value A0 of a power distribution channel and an impedance initial value R0 of a calibrating channel are measured when the device is used at the first time, the access impedance A of the power distribution channel in a using process is tested, the access impedance R of the calibrating channel is tested, and a failure fuse is arranged in the channel if absolute A- R - R0 absolute -A0 exceeds a threshold value. The satellite-borne general power distribution device can improve safety of a power supply cable grid of the whole satellite.
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 the power supply buses of high-power on satellite is very general.The bus power supply high pressure of satellite reaches 100V, the output power multikilowatt is the myriawatt level even, in recent years, and due to each side reasons such as design, techniques, the accident of bus load short circuits or unexpected overlap joint happens occasionally, and even many bus catastrophic failure that whole star lost efficacy because short trouble causes occurs in the rail model.
Therefore when satellite is powered, usually need to use fuse that a bus is protected, traditional satellite bus will protect the fuse of a bus to be positioned over the inside of each load.Although this mode can play the effect of a bus of protection, for the whole star cable of each load supplying but is in outside the bus protection fuse.Whole star cable system is walked line length on star, area coverage is large, in case some local protection are not in place, will cause the bus overload, and this just brings very big risk for the power supply safety of whole star.
Simultaneously, because fuse is positioned over load inside, making the parallel redundancy of fuse become can not test event, and when only having fuse all to fuse, the load outage could be found 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 not only can be protected a bus of satellite, has improved simultaneously the security of whole star service cable net; Based on the measuring method of this device with mode relatively solved fuse in parallel can not test problem.
For achieving the above object, technical scheme of the present invention is:
A kind of spaceborne high voltage bus universal power distribution device wherein, this device comprises: power supply, main track bus-bar, negative wire bus-bar, fuse printed board, distribution output electric connector and distribution cable;
The positive pole of power supply is by the input end of a positive bus-bar access main track bus-bar, the output terminal of main track bus-bar connects the fuse printed board by distribution cable, comprise a plurality of fuses in the fuse printed board, each fuse connects one to one to the positive output node of distribution output electric connector, and each positive output node connects the input end of each load;
The output terminal of each load is connected with the negative output node that distribution is exported on electric connector 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 is by 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 that connects 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 the fuse that uses in said apparatus further, is 3.5A;
When connecting the low-power load of rated current I≤2.2A, the fuse that connects this load is 2;
When connecting rated current and be in middle power termination in 2.2A＜I＜4.5A scope, the fuse that connects this load is 3;
When connecting rated current and be in high power load in 4.5A≤I≤6.8A scope, the fuse that connects this load is 4.
Further, described fuse printed board further comprises miniwatt calibrated channel, middle calibration of power passage and high-power calibrated channel;
Its middle low power calibrated channel comprises the fuse of the 3.5A of 2 short circuits, and the equal parallel connection of the common port of each fuse and parallel connected end is 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 equal parallel connection of the common port of each fuse and parallel connected end is 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 equal parallel connection of the common port of each fuse and parallel connected end is welded, and the fuse of these 4 short circuits connects one to one to the distribution output node of distribution output electric connector.
The detection method of spaceborne high voltage bus universal power distribution device wherein, a kind of spaceborne high voltage bus universal power distribution device that this detection method provides for such scheme, the method comprises the steps:
A kind of spaceborne high voltage bus universal power distribution device that provides as above-mentioned scheme, wherein with each load corresponding be defined as busway by the positive pole of power supply to the current channel of negative pole;
Step 1, when this device uses for the first time, select one road busway to measure, measure the path resistance of selected busway anode, as test data, i.e. initial value A for the first time
0
Judge that the loading condition that institute's routing busway connects determines selected calibrated channel: if the load that connects during as the low-power load of rated current I≤2.2A, the path resistance of measuring the miniwatt calibrated channel is designated as R
0If the load that connects is rated current when being in middle power termination in 2.2A＜I＜4.5A scope, in measuring, the path resistance of calibration of power passage is designated as R
0If the load that connects is rated current when being in high power load in 4.5A≤I≤6.8A scope, the path resistance of measuring high-power calibrated channel is designated as R
0
Step 2, selected busway and its corresponding calibrated channel are tested, and the path resistance that will test this busway anode that obtains 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 be as defective criterion, if measured value A deducts result and initial value A after systematic error
0Difference surpass defective criterion, judge to have the 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, defective criterion is: 0.95m Ω;
If selected calibrated channel is middle calibration of power passage, defective criterion is: 1.90m Ω;
If selected calibrated channel is the miniwatt calibrated channel, defective criterion is: 5.70m Ω.
Beneficial effect:
1, this device moves forward satellite bus power protection fuse; make fuse no longer be placed in load inside; this design has not only increased the security of a bus in system level; can also make within whole star cable system is in the protection domain of fuse equally; improve the security of whole star power supply, reduced the risk of bus to the casing short circuit.This device can adapt to by the design of fuse the protection demand of the load of different capacity on satellite power supply, when load variations, only needs the wire jumper that carries out between fuse to get final product.
2, this device has designed the measurement that calibrated channel can provide systematic error, for the inefficacy verification of fuse provides may.
3, the present invention has proposed the fuse inefficacy method of calibration for said apparatus simultaneously, the test value that obtains by initial value and test process with early detection compares, can accurately judge the fuse failure conditions of busway, the complete machine that has solved fuse in parallel can not be surveyed problem, has improved whole star power supply reliability and security.
Description of drawings
The described high voltage bus universal power distribution of Fig. 1 embodiment of the present invention 1 structure drawing of device;
The described high voltage bus universal power distribution of Fig. 2 embodiment of the present invention 3 structure drawing of device.
Embodiment
Below in conjunction with the accompanying drawing embodiment that develops simultaneously, describe the present invention.
Embodiment 1
The invention provides a kind of spaceborne high voltage bus universal power distribution device comprises: power supply, main track bus-bar, negative wire bus-bar, fuse printed board, distribution output electric connector and distribution cable.Concrete structure connects as shown in Figure 1.
The positive pole of power supply is passed through the input end of a positive bus-bar access main track bus-bar, the output terminal of main track bus-bar connects the fuse printed board by distribution cable, comprise a plurality of fuses in the fuse printed board, each fuse connects one to one to the positive output node of distribution output electric connector, and each positive output node connects the input end of each load.
The output terminal of each load is connected with the negative output node that distribution is exported on electric connector 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 is by the negative pole of a negative busbar access power supply.
According to above annexation, the flow direction of distribution electric current is: the distribution electric current is exported by a positive bus-bar by the positive pole of power supply, flow to distribution output electric connector through the fuse in printed board, and export the positive output node-flow of electric connector to load by distribution; The distribution electric current is directly got back to the power supply negative terminal by the negative output node that distribution is exported electric connector after overload.This shows, 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 a plurality of loads; the busway of each load uses the fuse of different quantity to protect; the common port parallel connection of each fuse is welded in the fuse printed board; wherein connect the parallel connected end welding in parallel of the fuse of same load; independent welding between the parallel connected end of connection unequally loaded fuse, the fuse parallel connected end that namely belongs to same busway is in parallel.
For example suppose to have used three fuses, these three fuse parallel connected end welding in parallel in the busway of this device institute bringing onto load one; And the busway of load two has used two fuses, and each is all separate with three fuse parallel connected end of load one for these two fuses, and the welding in parallel of these two fuse parallel connected end.
Embodiment 2
In this device, the quantity of the fuse in the fuse printed board, need to determine according to the load-carrying situation of this device institute, the concrete condition correspondence is 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, have following situation:
When connecting the low-power load of rated current I≤2.2A, the fuse that connects this load is 2, i.e. used 2 fuses in busway corresponding to this load;
When connecting rated current and be in middle power termination in 2.2A＜I＜4.5A scope, the fuse that connects this load is 3, i.e. used 2 fuses in busway corresponding to this load;
When connecting rated current and be in high power load in 4.5A≤I≤6.8A scope, the fuse that connects this load is 4, i.e. used 4 fuses in busway corresponding to this load.
This sorting technique has covered all loading conditions of present satellite.
The load-carrying situation of device is analyzed, selected the fuse of respective numbers.For example, suppose that this device institute bringing onto load situation is: with 5 low-power loads, 4 merely hit power termination and 2 high power loads, in the fuse printed board of this device, the quantity of required fuse is 30.
Simultaneously according to this device load-carrying situation the parallel connected end of the fuse in the fuse printed board is connected, the fuse parallel connected end use wire of the same load of correspondence is connected to form busway.Corresponding one road busway of each load.Namely, in the present embodiment, 30 fuses are connected to form 11 road busways, respectively corresponding 11 loads, 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 be by the wire jumper between fuse to adapt to the protection requirement of different capacity load, when load variations, by carrying out wire jumper and can adapt to load variations between fuse.
On the basis of embodiment 1, the present embodiment further has three road calibrated channels, comprise miniwatt calibrated channel, middle calibration of power passage and high-power calibrated channel, this three road calibrated channel is used for respectively low-power load path, middle power termination path and high power load path are carried out the calibration of systematic error.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 equal parallel connection of the common port of each fuse and parallel connected end is 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 equal parallel connection of the common port of each fuse and parallel connected end is 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 equal parallel connection of the common port of each fuse and parallel connected end is 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 testing so be considered as constant, yet due to effects of biases, if have variable quantity in the path resistance of once testing the alignment passage than the initial testing value, think that this variable quantity is systematic error.
The design of the present embodiment is the 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, the present invention provides a kind of measuring method for this device simultaneously, at first with each load corresponding be defined as busway by the positive pole of power supply to the current channel of negative pole; The method is specific as follows:
Step 1, obtain spaceborne high voltage bus universal power distribution device according to the described structure of embodiment 2, wherein in power distribution equipment each load all corresponding one by the positive pole of the power supply current channel to negative pole, be designated as busway;
When using for the first time, select one road busway to measure at device, measure the path resistance of selected busway anode, as test data, i.e. initial value A for the first time
0
The loading condition that judgement institute routing busway connects is determined selected calibrated channel: if the rated current I of the load that connects≤2.2A selects the miniwatt calibrated channel, the path resistance of measuring the miniwatt calibrated channel is designated as R
0If the rated current of the load that connects is in 2.2A＜I＜4.5A scope, calibration of power passage in selecting, in measurement, the path resistance of calibration of power passage is designated as R
0If the rated current of the load that connects is in 4.5A≤I≤6.8A scope, select high-power calibrated channel, the path resistance of 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, selected busway and its corresponding calibrated channel are tested, and the path resistance that will test this busway anode that obtains 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 be as defective criterion, should arrange according to each measurement result appropriateness when defective criterion is set actual, if measured value A deducts the systematic error of this time test | R-R
0| after result and initial value A
0Difference surpass defective criterion, judge in the i time test, have the inefficacy fuse in this road busway, otherwise the fuse of judgement busway is working properly.。
When the positive terminal impedance of selected busway is tested, measured value deducts the test value that the systematic error of this time test can be expressed the positive terminal impedance of this busway, and the positive terminal impedance of this busway that initial value is this device to be surveyed when using for the first time, can express the normal value of this busway, test value should fluctuate in the certain limit of normal value, thinks in this busway, the fuse inefficacy is arranged if surpass this scope.
Obtained under different calibrated channels the setting of different defective criterions in the present embodiment by many experiments:
If selected calibrated channel is high-power calibrated channel, defective criterion is: 0.95m Ω;
If selected calibrated channel is middle calibration of power passage, defective criterion is: 1.90m Ω;
If selected calibrated channel is the miniwatt calibrated channel, defective criterion is: 5.70m Ω.
In sum, these are only preferred embodiment of the present invention, is not for limiting protection scope of the present invention.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (5)
1. a spaceborne high voltage bus universal power distribution device, is characterized in that, this device comprises: power supply, main track bus-bar, negative wire bus-bar, fuse printed board, distribution output electric connector and distribution cable;
The positive pole of power supply is by the input end of a positive bus-bar access main track bus-bar, the output terminal of main track bus-bar connects the fuse printed board by distribution cable, comprise a plurality of fuses in the fuse printed board, each fuse connects one to one to the positive output node of distribution output electric connector, and each positive output node connects the input end of each load;
The output terminal of each load is connected with the negative output node that distribution is exported on electric connector 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 is by 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 that connects the fuse of same load is welded in printed board, independent welding between the parallel connected end of connection unequally loaded fuse.
2. spaceborne high voltage bus universal power distribution device according to claim 1, is characterized in that, the rated current of described fuse is 3.5A;
When connecting the low-power load of rated current I≤2.2A, the fuse that connects this load is 2;
When connecting rated current and be in middle power termination in 2.2A＜I＜4.5A scope, the fuse that connects this load is 3;
When connecting rated current and be in high power load in 4.5A≤I≤6.8A scope, the fuse that connects this load is 4.
3. a kind of spaceborne high voltage bus universal power distribution device as claimed in claim 2, is characterized in that, described fuse printed board further comprises miniwatt calibrated channel, middle calibration of power passage and high-power calibrated channel;
Its middle low power calibrated channel comprises the fuse of the 3.5A of 2 short circuits, and the equal parallel connection of the common port of each fuse and parallel connected end is 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 equal parallel connection of the common port of each fuse and parallel connected end is 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 equal parallel connection of the common port of each fuse and parallel connected end is welded, and the fuse of these 4 short circuits connects one to one to the distribution output node of distribution output electric connector.
4. the detection method of a spaceborne high voltage bus universal power distribution device as claimed in claim 3, is characterized in that, the method comprises the steps:
With each load corresponding be defined as busway by the positive pole of power supply to the current channel of negative pole;
Step 1, when using for the first time, select one road busway to measure at device, measure the path resistance of selected busway anode, as test data, i.e. initial value A for the first time
0
Judge that the loading condition that institute's routing busway connects determines selected calibrated channel: if the load that connects during as the low-power load of rated current I≤2.2A, the path resistance of measuring the miniwatt calibrated channel is designated as R
0If the load that connects is rated current when being in middle power termination in 2.2A＜I＜4.5A scope, in measuring, the path resistance of calibration of power passage is designated as R
0If the load that connects is rated current when being in high power load in 4.5A≤I≤6.8A scope, the path resistance of measuring high-power calibrated channel is designated as R
0
Step 2, selected busway and its corresponding calibrated channel are tested, and the path resistance that will test this busway anode that obtains 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 be as defective criterion, if measured value A deducts result and initial value A after systematic error
0Difference surpass defective criterion, judge to have the inefficacy fuse in busway.
5. the detection method of a kind of spaceborne high voltage bus universal power distribution device as claimed in claim 4, 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, defective criterion is: 0.95m Ω;
If selected calibrated channel is middle calibration of power passage, defective criterion is: 1.90m Ω;
If selected calibrated channel is the miniwatt calibrated channel, 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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| 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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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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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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| 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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| CN103383425B (en) | 2016-01-20 |
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