CN107656186A - Detection method of high-voltage direct-current circuit and high-voltage direct-current circuit - Google Patents
Detection method of high-voltage direct-current circuit and high-voltage direct-current circuit Download PDFInfo
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- CN107656186A CN107656186A CN201710756880.9A CN201710756880A CN107656186A CN 107656186 A CN107656186 A CN 107656186A CN 201710756880 A CN201710756880 A CN 201710756880A CN 107656186 A CN107656186 A CN 107656186A
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- 238000001514 detection method Methods 0.000 title claims abstract description 32
- 230000007257 malfunction Effects 0.000 claims description 39
- 230000005611 electricity Effects 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 5
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 2
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- 238000010586 diagram Methods 0.000 description 1
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- 238000005516 engineering process Methods 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/2832—Specific tests of electronic circuits not provided for elsewhere
- G01R31/2836—Fault-finding or characterising
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- General Physics & Mathematics (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention provides a fault detection method of a high-voltage direct-current circuit and the high-voltage direct-current circuit, relates to the field of fault detection, and aims to solve the technical problem that the fault detection of components in the high-voltage direct-current circuit cannot be realized in the prior art, wherein the fault detection method of the high-voltage direct-current circuit in the embodiment of the invention comprises the following steps: acquiring a first resistance value of an output end of the component to be detected and a second resistance value of an output end of the high-voltage direct-current circuit when the component to be detected and the rest components of the high-voltage direct-current circuit are in a disconnected state; and determining the fault states of the component to be detected and the rest components of the high-voltage direct-current circuit according to the first resistance value and the second resistance value. According to the embodiment of the invention, whether the high-voltage direct-current circuit has a fault can be judged, and when the high-voltage direct-current circuit has a fault, the specific component with the fault can be accurately determined.
Description
Technical field
The present invention relates to field of fault detection, the detection method and high voltage direct current of especially a kind of hvdc circuit
Road.
Background technology
Because greenhouse effects etc. influence, cause the frequency that the disaster such as flood occurs in recent years increasing, and then cause car
The possibility more and more higher for traveling of paddling., it is necessary to be detected to the insulating properties of vehicle after vehicle paddles traveling, ensure
In the case that the insulating properties of vehicle are good, it could continue to travel automobile.Traditional fault detection method can only be to height
Straightening current circuit is detected, and can not realize whether failure detects to the specific part in hvdc circuit.
The content of the invention
Technical problems to be solved of the embodiment of the present invention are to provide the fault detection method and height of a kind of hvdc circuit
Straightening current circuit, to realize the fault detect to the part of hvdc circuit.
In order to solve the above technical problems, the fault detection method of hvdc circuit provided in an embodiment of the present invention, including：
It is to be detected when obtaining the connection between the remainder of part and hvdc circuit to be detected and being off
The second resistance value of the first resistor value of the output end of part and the output end of hvdc circuit；
According to the first resistor value and the second resistance value, the part to be detected and the high voltage direct current are determined
The malfunction of the remainder on road.
Preferably, the second of the first resistor value of the output end of part to be detected and the output end of hvdc circuit is obtained
The step of resistance value, includes：
The first resistor value and the second resistance value are detected by megameter, obtain the defeated of part to be detected
Go out the second resistance value of the first resistor value at end and the output end of hvdc circuit.
Preferably, according to the first resistor value and the second resistance value, the part to be detected and the height are determined
The step of malfunction of the remainder of straightening current circuit, includes：
It is less than the first predetermined resistance in the first resistor value and the second resistance value is equal to the described first predetermined electricity
During resistance, determine that the part to be detected is in malfunction, the remainder of the hvdc circuit is not in failure shape
State；Or
It is equal to first predetermined resistance in the first resistor value and the second resistance value is pre- less than described first
When determining resistance value, determine that the part to be detected is not in malfunction, in the remainder of the hvdc circuit extremely
A few part is in malfunction；Or
When the first resistor value and the second resistance value are respectively less than first predetermined resistance, it is determined that described treat
At least one part in the remainder of detection part and the hvdc circuit is in malfunction.
Preferably, when part to be detected is electrokinetic cell, the first resistor value of the output end of part to be detected is obtained
Step includes：
Connection between acquisition electrokinetic cell and the remainder of hvdc circuit is off and and power electric
When connection between pond and external power supply is in connected state, the first resistor value of the output end of electrokinetic cell.
Preferably, methods described also includes：
When the connection between at least two parts in acquisition hvdc circuit is in connected state, high voltage direct current
The 3rd resistor value of the output end on road；
According to the 3rd resistor value, the malfunction of the hvdc circuit is determined.
Preferably, the step of 3rd resistor value of the output for obtaining hvdc circuit includes：
Obtain the resistance in parallel with the first output end of hvdc circuit and hvdc circuit the first output end it
Between connection when being off, the first voltage value of the first output end of hvdc circuit and hvdc circuit
The second voltage value of second output end；
Obtain the resistance in parallel with the first output end of hvdc circuit and hvdc circuit the first output end it
Between connection when being in connected state, the third voltage value of first output end for obtaining hvdc circuit；
According to the first voltage value, the second voltage value and the third voltage value, the 3rd resistor value is obtained.
Preferably, according to the first voltage value, the second voltage value and the third voltage value, the described 3rd is obtained
The step of resistance value, includes：
Pass through formula：
Obtain the 3rd resistor value Ri, wherein, R0For the resistance value of the resistance, U1For the first voltage value, U1For
The second voltage value, ' U2For the third voltage value.
Preferably, include according to the 3rd resistor value, the step of the malfunction for determining the hvdc circuit：
When the 3rd resistor value is less than the second predetermined resistance, determine that the hvdc circuit is in failure shape
State.
Another aspect according to embodiments of the present invention, the embodiment of the present invention additionally provide a kind of hvdc circuit, including：
Controller；
At least two parts being connected in parallel with each other, one first controlling switch, institute are equipped with branch road where each part
Stating controller, corresponding first controlling switch connects respectively with least two parts, and at least two part includes：Power electric
At least two in pond, electric machine controller, DC/DC controllers, Vehicular charger, thermistor controller and compressor controller
It is individual；
Wherein, one of part that the controller is used at least two parts are determined is as part to be detected
When, first controlling switch of branch road disconnects where the control part to be detected so that part to be detected and at least two parts
In remainder between connection be off；
Obtain the second resistance value of the first resistor value of the output end of part to be detected and the output end of hvdc circuit；
According to the first resistor value and the second resistance value, the part to be detected and the high voltage direct current are determined
The malfunction of the remainder on road.
Preferably, the hvdc circuit also includes：
It is connected with electrokinetic cell, the external power supply for providing enable signal to electrokinetic cell, the external power supply passes through
One second controlling switch is connected with the electrokinetic cell, and second controlling switch is connected with the controller；
The controller is specifically used for：When it is determined that the part to be detected is the electrokinetic cell, control described second
Controlling switch closes so that the connection between the electrokinetic cell and the external power supply is in connected state, and obtains power
The second of the first resistor value of the output end of electrokinetic cell and the output end of hvdc circuit after battery connects with external power supply
Resistance value；
According to the first resistor value and the second resistance value, the electrokinetic cell and the hvdc circuit are determined
Remainder malfunction.
Preferably, the controller is additionally operable to：
Control at least two parts respectively corresponding to the first controlling switch connection close so that between at least two parts
Connection be in connected state, and the 3rd resistor value of the output end of at least two parts is obtained, according to the 3rd resistor
Value, determine the malfunction of the hvdc circuit.
Preferably, the hvdc circuit also includes：
The resistance in parallel with the first output end of hvdc circuit, the resistance pass through one the 3rd controlling switch and high pressure
The first output end connection of DC circuit, the 3rd controlling switch are connected with the controller；
The controller is additionally operable to：
The 3rd controlling switch is controlled to disconnect so that between the first output end of the resistance and hvdc circuit
Connection is off, and obtain the first output end of hvdc circuit first voltage value and hvdc circuit
The second voltage value of two output ends；
The 3rd controlling switch is controlled to close so that between the resistance and the first output end of at least two parts
Connection is in connected state, and obtains the third voltage value of the first output end of hvdc circuit；
According to the first voltage value, the second voltage value and the third voltage value, the 3rd resistor value is obtained.
Compared with prior art, the fault detection method and device of hvdc circuit provided in an embodiment of the present invention, extremely
Have the advantages that less：
It can interpolate that out whether hvdc circuit breaks down, can be accurate when hvdc circuit breaks down
Determine the specific part to have broken down in ground.
Brief description of the drawings
Fig. 1 is one of schematic flow sheet of fault detection method of hvdc circuit described in the embodiment of the present invention；
Fig. 2 is the two of the schematic flow sheet of the fault detection method of the hvdc circuit described in the embodiment of the present invention；
Fig. 3 is the idiographic flow schematic diagram of step 3 in the embodiment of the present invention；
Fig. 4 is the structural representation of mesohigh DC circuit of the embodiment of the present invention.
Embodiment
To make the technical problem to be solved in the present invention, technical scheme and advantage clearer, below in conjunction with accompanying drawing and tool
Body embodiment is described in detail.In the following description, there is provided such as specific configuration and the specific detail of component are only
In order to help comprehensive understanding embodiments of the invention.Therefore, it will be apparent to those skilled in the art that can be to reality described herein
Example is applied to make various changes and modifications without departing from scope and spirit of the present invention.In addition, for clarity and brevity, eliminate pair
The description of known function and construction.
Reference picture 1, the embodiments of the invention provide a kind of fault detection method of hvdc circuit, including：
Step 1, when obtaining the connection between the remainder of part and hvdc circuit to be detected and being off,
The second resistance value of the first resistor value of the output end of part to be detected and the output end of hvdc circuit.
Specifically, it is necessary to by part to be detected and high voltage direct current before detection first resistor value and second resistance value
The remainder on road it is separated, now, part to be detected is in off state, the remainder composition of hvdc circuit
Circuit is also at off state, and the second resistance value of the output end of hvdc circuit refers to the residue in addition to part to be detected
The resistance value of output end in the circuit that part is formed.
In step 1, the output end of part to be detected include the output end that is connected with the positive terminal of hvdc circuit and
The output end being connected with the negative pole end of hvdc circuit.The first resistor value of the output end of part to be detected is part to be detected
The two poles of the earth output end resistance value, the second resistance value of the output end of hvdc circuit refers to that the two poles of the earth of hvdc circuit are defeated
Go out the resistance value at end.
Obtain the second resistance value of the first resistor value of the output end of part to be detected and the output end of hvdc circuit
Step 1 include：
It is to the first resistor value and institute by megameter when being acquired to first resistor value and second resistance value
Second resistance value is stated to be detected, so obtain the output end of part to be detected first resistor value and hvdc circuit it is defeated
Go out the second resistance value at end.
Step 2, according to the first resistor value and the second resistance value, the part to be detected and the high pressure are determined
The malfunction of the remainder of DC circuit.
Preferably, step 2 includes：
Step 21, it is less than the first predetermined resistance in the first resistor value and the second resistance value is equal to described first
During predetermined resistance, determine that the part to be detected is in malfunction, the remainder of the hvdc circuit is not in
Malfunction；Or
Step 22, it is equal to first predetermined resistance in the first resistor value and the second resistance value is less than described
During the first predetermined resistance, determine that the part to be detected is not in malfunction, the remainder of the hvdc circuit
In at least one part be in malfunction；Or
Step 23, when the first resistor value and the second resistance value are respectively less than first predetermined resistance, really
At least one part in the remainder of the fixed part to be detected and the hvdc circuit is in malfunction.
If first resistor value occur and second resistance value being equal to the first predetermined resistance, now show part to be detected
Do not broken down with the remainder of hvdc circuit.
Specifically, the first predetermined resistance is the maximum resistance limit value of megameter, in step 21 to step 23, the first electricity
Resistance is equal with the first predetermined resistance, show be in off state under bar part to be detected it is functional, do not occur therefore
Barrier；First resistor value is less than the first predetermined resistance, and the part to be detected for showing to be under short-circuit condition breaks down；Second electricity
Resistance is equal with the first predetermined resistance, shows that remainder does not break down, and second resistance value is less than the first predetermined resistance,
Show that at least one part in remainder breaks down.
If according to first resistor value and second resistance value in step 1, the result of acquisition is in step 22 or step 23
As a result, then need to investigate remainder one by one, when investigating remainder one by one, with above-mentioned steps 1 and step
Rapid 2 method is identical, here, without repeating.
When part to be detected is electrokinetic cell, step 1 includes：
It should be noted that when part to be detected is electrokinetic cell, in step 1, the output of part to be detected is obtained
The step of first resistor value at end, includes：
Connection between acquisition electrokinetic cell and the remainder of hvdc circuit is off and and power electric
When connection between pond and external power supply is in connected state, the first resistor value of the output end of electrokinetic cell.
Herein, the external power supply is used to provide enable signal to electrokinetic cell, due to electrokinetic cell and hvdc circuit
Remainder between connection be off, the 12V batteries on automobile can not provide enabled letter for electrokinetic cell again
Number, thus, it is necessary to cause electrokinetic cell to be in enabled state by an external power supply after, could be to the output end of electrokinetic cell
First resistor value is acquired.
Part to be detected for miscellaneous part in addition to electrokinetic cell when, then need to only cause corresponding to part to be detected with
In a state disconnected between remaining part.
By above-mentioned steps 1 and step 2, it can determine whether each part in hvdc circuit occurs event one by one
Barrier, ensures the fault detection accuracy to hvdc circuit.
Reference picture 2, it is preferable that methods described also includes：
Step 3, when the connection of at least two parts in acquisition hvdc circuit is in connected state, HVDC
The 3rd resistor value of the output end of circuit；
Step 4, according to the 3rd resistor value, the malfunction of the hvdc circuit is determined.
The setting of step 3 and step 4, for determining whether hvdc circuit breaks down.To hvdc circuit
When carrying out fault detect, it can be detected in the following manner：Step 3 and step 4 is first carried out, if being obtained according to step 3
3rd resistor value determine that the malfunction of hvdc circuit is non-malfunction, now, then without to perform step 1 and
Step 2；Show that the malfunction of hvdc circuit is malfunction in the result that step 4 obtains, then need to perform step 1
With step 2.Or fault detect is directly carried out to the part in hvdc circuit by step 1 and step 2.
Reference picture 3, step 3 includes：
Step 31, the resistance in parallel with the first output end of hvdc circuit and the first of hvdc circuit defeated is obtained
When the connection gone out between end is off, the first voltage value and HVDC of the first output end of hvdc circuit
The second voltage value of second output end of circuit；
Step 32, the resistance in parallel with the first output end of hvdc circuit and the first of hvdc circuit defeated is obtained
When the connection gone out between end is in connected state, the third voltage value of first output end for obtaining hvdc circuit；
Step 33, according to the first voltage value, the second voltage value and the third voltage value, the described 3rd is obtained
Resistance value.
In step 33, the 3rd resistor value of acquisition is the resistance of the second output end of hvdc circuit, in the present invention
In embodiment, when the connection between resistance and the first output end of hvdc circuit is off, high pressure is defaulted as
The first voltage value of first output end of DC circuit is more than the second voltage value of the second output end of hvdc circuit.
Specifically, for the acquisition of first voltage value, second voltage value and third voltage value, adopted by ohmmeter
Collection.
Preferably, step 33 includes：
Pass through formula：
Obtain the 3rd resistor value Ri, wherein, R0For the resistance value of the resistance, U1For the first voltage value, U1’
For the second voltage value, U2For the third voltage value.
The resistance value R of resistance0For a given value.In embodiments of the present invention, be defaulted as hvdc circuit first is defeated
Go out the first voltage value U at end1More than the second voltage value U of the second output end1’。
Preferably, step 4 includes：
Step 41, when the 3rd resistor value is less than the second predetermined resistance, determine that the hvdc circuit is in
Malfunction.
Herein, the second predetermined resistance is the minimum insulation resistance value that vehicle requires hvdc circuit, and second is predetermined electric
Resistance is less than the first predetermined resistance.Specifically, second predetermined resistance RimaxNumerical value be:
Rimax=500* (U1′+U1)
Wherein, U1For first voltage value, U1' it is second voltage value.
By the above method of the present invention, it can interpolate that out whether hvdc circuit breaks down, in hvdc circuit
During failure, the specific part of failure can be precisely determined.
Reference picture 4, another aspect according to embodiments of the present invention, the embodiment of the present invention additionally provide a kind of high voltage direct current
Road, including：
Controller 1；
At least two parts being connected in parallel with each other, one first controlling switch 2, institute are equipped with branch road where each part
Stating controller 1, corresponding first controlling switch 2 connects respectively with least two parts, and at least two part includes：Power
At least two in battery, electric machine controller, DC/DC controllers, Vehicular charger, thermistor controller and compressor controller
It is individual；
Wherein, one of part that the controller 1 is used at least two parts are determined is as portion to be detected
During part, first controlling switch 2 of branch road disconnects where the control part to be detected so that part to be detected and at least two
The connection between remainder in part is off；
Obtain the second resistance value of the first resistor value of the output end of part to be detected and the output end of hvdc circuit；
According to the first resistor value and the second resistance value, the part to be detected and the high voltage direct current are determined
The malfunction of the remainder on road.When being detected to the hvdc circuit, pass through above-mentioned steps 3 and step 4 first
Determine hvdc circuit whether failure, if determining non-failure according to the 3rd resistor value of acquisition, stop to HVDC
The fault detect of circuit；If determining hvdc circuit failure according to the 3rd resistor value of acquisition, need at least two
Each part in part is detected successively, when being detected for each part at least two parts, if according to treating
The output end of detection part first resistor value and remainder composition circuit output end second resistance be worth to be
Result in step 21, then stop detection；If what is obtained is the result in step 22 or step 23, need to continue executing with step
1 and 2, untill the part of all failures is determined.
Preferably, reference picture 4, the hvdc circuit also include：
It is connected with electrokinetic cell, the external power supply 3 for providing enable signal to electrokinetic cell, the external power supply 3 is logical
Cross one second controlling switch 4 to be connected with the electrokinetic cell, second controlling switch 4 is connected with the controller 1；
The controller 1 is specifically additionally operable to：When it is determined that the part to be detected is the electrokinetic cell, control described the
Two controlling switches 4 close so that the connection between the electrokinetic cell and the external power supply 3 is in connected state, and obtains
The first resistor value of the output end of electrokinetic cell and the output end of hvdc circuit after electrokinetic cell connects with external power supply 3
Second resistance value；
According to the first resistor value and the second resistance value, the electrokinetic cell and the hvdc circuit are determined
Remainder malfunction.
When part to be detected is electrokinetic cell, because the first controlling switch 2 of branch road where electrokinetic cell disconnects so that
Enable signal can not be sent to electrokinetic cell again by being used to send the 12V batteries of enable signal on automobile to electrokinetic cell, in order to
The detection of the resistance value to the output end of electrokinetic cell is completed, at this time, it may be necessary to which being provided by an external power supply 3 to electrokinetic cell makes
Can signal.Preferably, the controller is additionally operable to：
Control at least two parts respectively corresponding to the first controlling switch 2 connect and close so that at least two parts it
Between connection be in connected state, and the 3rd resistor value of the output end of at least two parts is obtained, according to the described 3rd electricity
Resistance, determine the malfunction of the hvdc circuit.
Herein, control at least two parts respectively corresponding to the first controlling switch 2 close, that is, ensure hvdc circuit
Channel status is kept, to realize the detection of above-mentioned steps 3 and step 4.
Preferably, reference picture 4, the hvdc circuit also include：
The resistance 5 in parallel with the first output end of hvdc circuit, the resistance 5 by one the 3rd controlling switch 6 with
The first output end connection of hvdc circuit, the 3rd controlling switch 6 are connected with the controller 1；
The controller 1 is additionally operable to：
The 3rd controlling switch 6 is controlled to disconnect so that between the first output end of the resistance 5 and hvdc circuit
Connection be off, and obtain the first voltage value and hvdc circuit of the first output end of hvdc circuit
The second voltage value of second output end；
The 3rd controlling switch 6 is controlled to close so that between the first output end of the part of resistance 5 and at least two
Connection be in connected state, and obtain the third voltage value of the first output end of hvdc circuit；According to the described first electricity
Pressure value, the second voltage value and the third voltage value, obtain the 3rd resistor value.
Specifically, in Fig. 4, hvdc circuit also includes the motor that is connected with electric machine controller, and motor passes through one the
Four controlling switches 7 are connected with electric machine controller, and the 4th controlling switch 7 is connected with controller 1., can be with the embodiment of the present invention
By the way that the first controlling switch 2 of branch road where electric machine controller and the 4th controlling switch 7 are turned off, by motor control
The resistance value of the output end of device is detected, judge electric machine controller output end whether failure.
The hvdc circuit provided by the above embodiment of the present invention, it is possible to achieve examined to the failure of hvdc circuit
Survey, when hvdc circuit breaks down, the specific part of failure can be precisely determined.Shorten to HVDC
The detection time of circuit, and ensure detection efficiency.
Described above is the preferred embodiment of the present invention, it is noted that for those skilled in the art
For, on the premise of principle of the present invention is not departed from, some improvements and modifications can also be made, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (12)
- A kind of 1. fault detection method of hvdc circuit, it is characterised in that including：When obtaining the connection between the remainder of part and hvdc circuit to be detected and being off, part to be detected Output end first resistor value and hvdc circuit output end second resistance value；According to the first resistor value and the second resistance value, the part to be detected and the hvdc circuit are determined The malfunction of remainder.
- 2. the fault detection method of hvdc circuit according to claim 1, it is characterised in that obtain part to be detected Output end first resistor value and hvdc circuit output end second resistance value the step of include：The first resistor value and the second resistance value are detected by megameter, obtain the output end of part to be detected First resistor value and hvdc circuit output end second resistance value.
- 3. the fault detection method of hvdc circuit according to claim 1, it is characterised in that according to the described first electricity Resistance and the second resistance value, determine the malfunction of the remainder of the part to be detected and the hvdc circuit The step of include：It is less than the first predetermined resistance in the first resistor value and the second resistance value is equal to first predetermined resistance When, determine that the part to be detected is in malfunction, the remainder of the hvdc circuit is not in malfunction；Or PersonIt is equal to first predetermined resistance in the first resistor value and the second resistance value is less than the described first predetermined electricity During resistance, determine that the part to be detected is not in malfunction, at least one in the remainder of the hvdc circuit Individual part is in malfunction；OrWhen the first resistor value and the second resistance value are respectively less than first predetermined resistance, determine described to be detected At least one part in the remainder of part and the hvdc circuit is in malfunction.
- 4. the fault detection method of hvdc circuit according to claim 1, it is characterised in that be in part to be detected Include during electrokinetic cell, the step of the first resistor value for the output end for obtaining part to be detected：Obtain the connection between the remainder of electrokinetic cell and hvdc circuit be off and with electrokinetic cell with When connection between external power supply is in connected state, the first resistor value of the output end of electrokinetic cell.
- 5. the fault detection method of hvdc circuit according to claim 1, it is characterised in that methods described is also wrapped Include：When the connection between at least two parts in acquisition hvdc circuit is in connected state, hvdc circuit The 3rd resistor value of output end；According to the 3rd resistor value, the malfunction of the hvdc circuit is determined.
- 6. the fault detection method of hvdc circuit according to claim 5, it is characterised in that described to obtain high straightening The step of 3rd resistor value of the output of current circuit, includes：Obtain between the resistance in parallel with the first output end of hvdc circuit and the first output end of hvdc circuit When connection is off, the first voltage value of the first output end of hvdc circuit and the second of hvdc circuit The second voltage value of output end；Obtain between the resistance in parallel with the first output end of hvdc circuit and the first output end of hvdc circuit When connection is in connected state, the third voltage value of first output end for obtaining hvdc circuit；According to the first voltage value, the second voltage value and the third voltage value, the 3rd resistor value is obtained.
- 7. the fault detection method of hvdc circuit according to claim 6, it is characterised in that according to the described first electricity Pressure value, the second voltage value and the third voltage value, the step of obtaining the 3rd resistor value, include：Pass through formula：<mrow> <msub> <mi>R</mi> <mi>i</mi> </msub> <mo>=</mo> <msub> <mi>R</mi> <mn>0</mn> </msub> <mfrac> <mrow> <msub> <mi>U</mi> <mn>1</mn> </msub> <mo>-</mo> <msub> <mi>U</mi> <mn>2</mn> </msub> </mrow> <msub> <mi>U</mi> <mn>2</mn> </msub> </mfrac> <mrow> <mo>(</mo> <mn>1</mn> <mo>+</mo> <mfrac> <msubsup> <mi>U</mi> <mn>1</mn> <mo>,</mo> </msubsup> <msub> <mi>U</mi> <mn>1</mn> </msub> </mfrac> <mo>)</mo> </mrow> </mrow>Obtain the 3rd resistor value Ri, wherein, R0For the resistance value of the resistance, U1For the first voltage value, U1' it is described Second voltage value, U2For the third voltage value.
- 8. the fault detection method of hvdc circuit according to claim 7, it is characterised in that according to the described 3rd electricity Resistance, include the step of the malfunction for determining the hvdc circuit：When the 3rd resistor value is less than the second predetermined resistance, determine that the hvdc circuit is in malfunction.
- A kind of 9. hvdc circuit, it is characterised in that including：Controller；At least two parts being connected in parallel with each other, one first controlling switch, the control are equipped with branch road where each part Corresponding first controlling switch connects device processed respectively with least two parts, and at least two part includes：Electrokinetic cell, electricity At least two in machine controller, DC/DC controllers, Vehicular charger, thermistor controller and compressor controller；Wherein, the controller is used for when one of part in determining at least two parts is as part to be detected, First controlling switch of branch road disconnects where controlling the part to be detected so that in part to be detected and at least two parts Connection between remainder is off；Obtain the second resistance value of the first resistor value of the output end of part to be detected and the output end of hvdc circuit；According to the first resistor value and the second resistance value, the part to be detected and the hvdc circuit are determined The malfunction of remainder.
- 10. hvdc circuit according to claim 9, it is characterised in that the hvdc circuit also includes：It is connected with electrokinetic cell, the external power supply for providing enable signal to electrokinetic cell, the external power supply passes through one the Two controlling switches are connected with the electrokinetic cell, and second controlling switch is connected with the controller；The control implement body is additionally operable to：When it is determined that the part to be detected is the electrokinetic cell, control second control System switch closure so that the connection between the electrokinetic cell and the external power supply is in connected state, and obtains power electric Second electricity of the first resistor value of the output end of electrokinetic cell and the output end of hvdc circuit after pond connects with external power supply Resistance；According to the first resistor value and the second resistance value, the surplus of the electrokinetic cell and the hvdc circuit is determined The malfunction of remaining part part.
- 11. hvdc circuit according to claim 9, it is characterised in that the controller is additionally operable to：Control at least two parts respectively corresponding to the first controlling switch connection close so that the company between at least two parts Connect and be in connected state, and obtain the 3rd resistor value of the output end of at least two parts, according to the 3rd resistor value, really The malfunction of the fixed hvdc circuit.
- 12. hvdc circuit according to claim 11, it is characterised in that the hvdc circuit also includes：The resistance in parallel with the first output end of hvdc circuit, the resistance pass through one the 3rd controlling switch and HVDC The first output end connection of circuit, the 3rd controlling switch are connected with the controller；The controller is additionally operable to：The 3rd controlling switch is controlled to disconnect, the connection between the first output end of the resistance and hvdc circuit is in Off-state, and obtain the first voltage value of the first output end of hvdc circuit and the second output end of hvdc circuit Second voltage value；The 3rd controlling switch is controlled to close so that the connection between the resistance and the first output end of at least two parts In connected state, and obtain the third voltage value of the first output end of hvdc circuit；According to the first voltage value, the second voltage value and the third voltage value, the 3rd resistor value is obtained.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710756880.9A CN107656186B (en) | 2017-08-29 | 2017-08-29 | Detection method of high-voltage direct-current circuit and high-voltage direct-current circuit |
| PCT/CN2018/100599 WO2019042127A1 (en) | 2017-08-29 | 2018-08-15 | Fault detection method for high-voltage direct current circuit and high-voltage direct current circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710756880.9A CN107656186B (en) | 2017-08-29 | 2017-08-29 | Detection method of high-voltage direct-current circuit and high-voltage direct-current circuit |
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| CN107656186A true CN107656186A (en) | 2018-02-02 |
| CN107656186B CN107656186B (en) | 2020-02-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019042127A1 (en) * | 2017-08-29 | 2019-03-07 | 北京新能源汽车股份有限公司 | Fault detection method for high-voltage direct current circuit and high-voltage direct current circuit |
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| WO2019042127A1 (en) | 2019-03-07 |
| CN107656186B (en) | 2020-02-07 |
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