CN207067306U - For searching the servicing unit of DC system grounding point failure - Google Patents
For searching the servicing unit of DC system grounding point failure Download PDFInfo
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- CN207067306U CN207067306U CN201721037028.8U CN201721037028U CN207067306U CN 207067306 U CN207067306 U CN 207067306U CN 201721037028 U CN201721037028 U CN 201721037028U CN 207067306 U CN207067306 U CN 207067306U
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Abstract
The utility model provides a kind of servicing unit for being used to search DC system grounding point failure, and described device includes battery pack and output wiring terminal；Wherein, the positive pole of the battery pack is connected with the positive terminal of the output wiring terminal, and the negative pole of the battery pack is connected with the negative terminal of the output wiring terminal；The positive terminal and negative terminal of the output wiring terminal access branch road to be investigated by polarity respectively.When carrying out DC system grounding point failure investigation, servicing unit is powered for branch road to be investigated so that branch road to be investigated does not power off in whole process.It ensure that all kinds of devices to be worked in branch road to be investigated do not power off, avoid the loss for needing interruption maintenance to bring in the past, improve the reliability of power supply.
Description
Technical field
The utility model embodiment is related to power supply technique field, is connect more particularly, to one kind for searching straight-flow system
The servicing unit of site failures.
Background technology
Straight-flow system is transformer station, the important part in one, power plant in power system, and it includes battery, filled
Motor and its auxiliary device, feeder line and direct current cabinet.Straight-flow system be generally used for protective relaying device, automatic control loop and
The equipment such as emergency lighting are powered.Once straight-flow system breaks down, it will seriously endangers transformer station, the economic fortune in power plant
Row and safety.Because the branch of straight-flow system is more, involving a wide range of knowledge, dielectric level is difficult to keep very high, thus be grounded
Chance is more, if handling not in time, consequence is extremely serious.When one point earth occurs for straight-flow system, it is searched in time,
The occurrence of preventing two points ground fault.When one point earth occurs for straight-flow system, the insulating monitor in straight-flow system direct current cabinet
Ground connection alarm can be shown, only holding alarm from system break when the branch road being grounded can just eliminate.
At present, when one point earth occurs for straight-flow system, each branch road is investigated frequently with open line method to determine to be grounded
Branch road.Concrete operations mode is the connection for using the dc circuit breaker in direct current cabinet to disconnect straight-flow system and branch road to be investigated one by one
Whether (turn-off time must not exceed 3 seconds), the alarm of observation DC insulation monitoring instrument eliminate, and judge it is corresponding if elimination is alerted
Grounding, recover feeder switch after judgement immediately.
But need to enter the equipment such as protective relaying device, automatic control loop and emergency lighting in above-mentioned detection process
The row short time has a power failure, and accident may occur because losing protection in outage transformer station and power plant.
Utility model content
The utility model embodiment provides a kind of use for overcoming above mentioned problem or solving the above problems at least in part
In the servicing unit for searching DC system grounding point failure.
The utility model embodiment provides a kind of servicing unit for being used to search DC system grounding point failure, the dress
Put including battery pack and output wiring terminal；Wherein,
The positive pole of the battery pack is connected with the positive terminal of the output wiring terminal, the negative pole of the battery pack and institute
State the negative terminal connection of output wiring terminal；
The positive terminal and negative terminal of the output wiring terminal access branch road to be investigated by polarity respectively.
Wherein, described device also includes boost module, and the boost module is DC voltage booster circuit, and the boost module is defeated
The positive pole for entering end is connected with the positive pole of the battery pack, the negative pole of the boost module input and the negative pole phase of the battery pack
Even.
Wherein, described device also includes the first Current Voltage monitoring module, the electricity of the first Current Voltage monitoring module
The positive pole of pressure monitoring table is connected with the positive pole of the output end of the boost module, the voltage of the first Current Voltage monitoring module
The negative pole of monitoring table is connected with the negative pole of the output end of the boost module, the electric current prison of the first Current Voltage monitoring module
Control table is serially connected in the negative pole of the output end of the boost module.
Wherein, described device also includes the second Current Voltage monitoring module, the electricity of the second Current Voltage monitoring module
The positive pole of pressure monitoring table is connected with the positive pole of the input of the boost module, the voltage of the second Current Voltage monitoring module
The negative pole of monitoring table is connected with the negative pole of the input of the boost module, the electric current prison of the second Current Voltage monitoring module
Control table is serially connected in the negative pole of the input of the boost module.
Wherein, described device also includes current divider, the current divider be serially connected with the battery pack and the boost module it
Between, and the current monitoring table of the second Current Voltage monitoring module is in parallel with the current divider.
Wherein, described device also includes supervisory circuit power transfer module, the supervisory circuit power transfer module it is defeated
The positive pole for entering end is connected with the positive pole of the battery pack, the negative pole of the input of the supervisory circuit power transfer module with it is described
The negative pole connection of battery pack, the positive pole of the supervisory circuit power transfer module output end are supervised with first Current Voltage respectively
The positive pole at control modular power source end connects with the positive pole of the second Current Voltage monitoring module power end, the supervisory circuit power supply
The negative pole of modular converter the output end negative pole with the first Current Voltage monitoring module power end and second electric current respectively
The negative pole connection of voltage monitoring module power end.
Wherein, described device also includes the first output isolating diode and the second output isolating diode, and described first is defeated
Go out isolating diode to be serially connected between the positive pole of the boost module output end and the positive terminal of the output wiring terminal, institute
State the second output isolating diode and be serially connected in the current monitoring table of the first Current Voltage monitoring module and the output connection
Between the negative terminal of post.
Wherein, described device also includes the first export insurance pipe and the second export insurance pipe, the first export insurance pipe
It is serially connected between the positive pole of the boost module output end and the positive terminal of the output wiring terminal, second output is protected
Dangerous pipe be serially connected in the first Current Voltage monitoring module current monitoring table and the output wiring terminal negative terminal it
Between.
Wherein, described device also includes alarm module, and the alarm module includes voltage comparator and buzzer, the electricity
Press comparator in parallel with the battery pack.
Wherein, described device also includes：Boost module, the first Current Voltage monitoring module, the second Current Voltage monitoring mould
Block, supervisory circuit power transfer module, the first output isolating diode, the second output isolating diode, current divider, the first output
Protective tube, the second export insurance pipe and alarm module；Wherein,
The boost module is DC voltage booster circuit, the positive pole of the boost module input and the positive pole of the battery pack
It is connected, the negative pole of the boost module input is connected with the negative pole of the battery pack；
The positive pole of the voltage monitoring table of the first Current Voltage monitoring module and the output end of the boost module are just
Extremely it is connected, the negative pole of the voltage monitoring table of the first Current Voltage monitoring module and the negative pole of the output end of the boost module
It is connected, the current monitoring table of the first Current Voltage monitoring module is serially connected in the negative pole of the output end of the boost module；
The positive pole of the voltage monitoring table of the second Current Voltage monitoring module and the input of the boost module are just
Extremely it is connected, the negative pole of the negative pole of the voltage monitoring table of the second Current Voltage monitoring module and the input of the boost module
It is connected, the current monitoring table of the second Current Voltage monitoring module is in parallel with the current divider, and the current divider is serially connected with institute
State between battery pack and the boost module；
The positive pole of the input of the supervisory circuit power transfer module is connected with the positive pole of the battery pack, the monitoring
The negative pole of the input of circuit power modular converter is connected with the negative pole of the battery pack, the supervisory circuit power transfer module
The positive pole of output end monitors with the positive pole of the first Current Voltage monitoring module power end and second Current Voltage respectively
The positive pole connection at modular power source end, the negative pole of the supervisory circuit power transfer module output end are electric with first electric current respectively
The negative pole of pressure monitoring module power end connects with the negative pole of the second Current Voltage monitoring module power end；
The first output isolating diode is serially connected in the positive pole of the boost module output end and the output wiring terminal
Positive terminal between, it is described second output isolating diode be serially connected in the first Current Voltage monitoring module electric current prison
Control between table and the negative terminal of the output wiring terminal；
The first export insurance pipe be serially connected in the boost module output end positive pole and the output wiring terminal just
Between the binding post of pole, the second export insurance pipe is serially connected in current monitoring table and the institute of the first Current Voltage monitoring module
Between the negative terminal for stating output wiring terminal；
The alarm module includes voltage comparator and buzzer, and the voltage comparator is in parallel with the battery pack.
A kind of servicing unit for being used to search DC system grounding point failure that the utility model embodiment provides, is being carried out
When DC system grounding point failure is investigated, servicing unit is branch road to be investigated power supply so that branch road to be investigated is all in whole process
Do not power off.It ensure that all kinds of devices to be worked in branch road to be investigated do not power off, avoid the damage for needing interruption maintenance to bring in the past
Lose, improve the reliability of power supply.
Brief description of the drawings
Fig. 1 is a kind of servicing unit for being used to search DC system grounding point failure that the utility model embodiment provides
Circuit diagram.
Embodiment
It is new below in conjunction with this practicality to make the purpose, technical scheme and advantage of the utility model embodiment clearer
Accompanying drawing in type embodiment, the technical scheme in the embodiment of the utility model is explicitly described, it is clear that described reality
It is the utility model part of the embodiment to apply example, rather than whole embodiments.Based on the embodiment in the utility model, ability
The every other embodiment that domain those of ordinary skill is obtained under the premise of creative work is not made, it is new to belong to this practicality
The scope of type protection.
Fig. 1 is a kind of servicing unit for being used to search DC system grounding point failure that the utility model embodiment provides,
As shown in figure 1, described device includes：Battery pack 1, power switch 2 and output wiring terminal 4；Wherein,
The positive pole of the battery pack 1 is connected with the positive terminal of the output wiring terminal 4, the negative pole of the battery pack 1
It is connected with the negative terminal of the output wiring terminal 4；
The positive terminal and negative terminal of the output wiring terminal 4 access branch road to be investigated by polarity respectively.
Specifically, because when treating investigation branch road progress earth point malfunction elimination, straight-flow system is needed with treating investigation branch
The disconnection of short out time, the servicing unit for being used to search DC system grounding point failure are used to investigate with waiting in straight-flow system
It is powered in this period that branch road disconnects for branch road to be investigated.Before straight-flow system and circuit to be investigated disconnect, direct current system
Unite and powered for branch road to be investigated.
The step of servicing unit provided using the utility model embodiment carries out earth point trouble shoot is as follows：
On the direct current cabinet of straight-flow system by the output wiring terminal 4 of servicing unit as corresponding to polarity accesses branch road to be investigated
The output end of dc circuit breaker；
Connection of the straight-flow system between branch road to be investigated is disconnected by dc circuit breaker corresponding to branch road to be investigated, by auxiliary
Device is helped to be powered for branch road to be investigated；
Whether the alarm of insulating monitor eliminates in observation direct current cabinet, if alarm eliminates, concludes earth point in the branch road,
If alarm does not eliminate, conclude that earth point not in the branch road, continues the investigation of next branch road.
A kind of servicing unit for being used to search DC system grounding point failure that the utility model embodiment provides, is being carried out
When DC system grounding point failure is investigated, servicing unit is branch road to be investigated power supply so that branch road to be investigated is all in whole process
Do not power off.It ensure that all kinds of devices to be worked in branch road to be investigated do not power off, avoid the damage for needing interruption maintenance to bring in the past
Lose, improve the reliability of power supply.
Based on above-described embodiment, described device also includes boost module 3, and the boost module 3 is DC voltage booster circuit,
The positive pole of the input of boost module 3 is connected with the positive pole of the battery pack 1, the negative pole of the input of boost module 3 with
The negative pole of the battery pack 1 is connected.
Wherein, the power switch 2 is between the battery pack 1 and the boost module 3, for controlling the battery
Disconnection and connection between group 1 and the boost module.
Specifically, power switch 2 is closed, boost module 3 is by voltage needed for the boost in voltage of battery pack 1 to circuit to be investigated
Value, servicing unit are together in parallel with straight-flow system and powered for branch road to be investigated.General device utilization voltage is 220V, is aided in here
The voltage that device finally exports is 220V.Can also be according to the difference of the utilization voltage of equipment, by boost module 3 by battery pack
The boost in voltage of 1 input is to different magnitudes of voltage.This setting can make the servicing unit of the utility model embodiment offer
The scope of application is wider.
Based on above-described embodiment, described device also includes the first Current Voltage monitoring module 5, the first Current Voltage prison
The positive pole for controlling the voltage monitoring table of module 5 is connected with the positive pole of the output end of the boost module 3, the first Current Voltage prison
The negative pole for controlling the voltage monitoring table of module 5 is connected with the negative pole of the output end of the boost module 3, the first Current Voltage prison
The current monitoring table of control module 5 is serially connected in the negative pole of the output end of the boost module 3.
Wherein, the output of the positive pole of the voltage monitoring table of the first Current Voltage monitoring module 5 and the boost module 3
The positive pole at end is connected, the negative pole of the voltage monitoring table of the first Current Voltage monitoring module 5 and the output of the boost module 3
The negative pole at end is connected, for measuring and showing the output voltage size of the output end of boost module 3.First Current Voltage
The current monitoring table of monitoring module 5 is serially connected in the negative pole of the output end of the boost module 3, for measuring and showing servicing unit
Size of current behind the road of access.Voltage by the first Current Voltage monitoring module 5 to the output end of boost module 3
With the measurement and display of electric current, maintainer can be made to know the working condition of servicing unit in real time, further ensure the row for the treatment of
Look into the reliability of branch road work.
Based on above-described embodiment, described device also includes the second Current Voltage monitoring module 6, the second Current Voltage prison
The positive pole for controlling the voltage monitoring table of module 6 is connected with the positive pole of the input of the boost module 3, the second electric current electricity
The negative pole of the voltage monitoring table of monitoring module 6 is pressed to be connected with the negative pole of the input of the boost module 3, the second electric current electricity
The current monitoring table of pressure monitoring module 6 is serially connected in the negative pole of the input of the boost module 3.
Wherein, the input of the positive pole of the voltage monitoring table of the second Current Voltage monitoring module 6 and the boost module 3
The positive pole at end is connected, negative pole and the boost module 3 of the voltage monitoring table of the second Current Voltage monitoring module 6
The negative pole of input be connected, for measuring and showing the voltage swing of the input of boost module 3.The second electric current electricity
The current monitoring table of pressure monitoring module 6 is serially connected in the negative pole of the input of the boost module 3, for measuring and showing the liter
The size of current of the input of die block 3.By the second Current Voltage monitoring module 6 to the output end of boost module 3
The measurement and display of voltage and current, can make maintainer know the working condition of servicing unit in real time, further ensure
The reliability of branch road work to be investigated.
Based on above-described embodiment, described device also includes current divider 7, and the current divider 7 is serially connected with the battery pack 1 and institute
Between stating boost module 3, and the current monitoring table of the second Current Voltage monitoring module 6 is in parallel with the current divider 7.
Because the electric current of the input of boost module 3 is larger, when measuring size of current, the current divider 7 is employed,
For protecting the current monitoring table of the second Current Voltage monitoring module 6.
Based on above-described embodiment, described device also includes supervisory circuit power transfer module 8, and the supervisory circuit power supply turns
The positive pole for changing the mold the input of block 8 is connected with the positive pole of the battery pack 1, the input of the supervisory circuit power transfer module 8
The negative pole at end is connected with the negative pole of the battery pack 1, the positive pole of the output end of supervisory circuit power transfer module 8 respectively with institute
The positive pole of the positive pole and the power end of the second Current Voltage monitoring module 6 of stating the power end of the first Current Voltage monitoring module 5 connects
Connect, the negative pole of the output end of supervisory circuit power transfer module 8 respectively with the power end of the first Current Voltage monitoring module 5
Negative pole connected with the negative pole of the power end of the second Current Voltage monitoring module 6.
Specifically, the supervisory circuit power transfer module 8 is used for for the first Current Voltage monitoring module 5 and described
Second Current Voltage monitoring module 6 is powered.
Further, the supervisory circuit power transfer module 8 be used for by the voltage conversion that the battery pack 1 inputs into
12V voltages are simultaneously powered for the first Current Voltage monitoring module 5 and the second Current Voltage monitoring module 6.
Based on above-described embodiment, described device also includes the first output isolating diode 9 and second and exports isolating diode
10, the first output isolating diode 9 is serially connected in the positive pole and the output wiring terminal 4 of the output end of boost module 3
Between positive terminal, the second output isolating diode 10 is serially connected in the electric current of the first Current Voltage monitoring module 5
Monitor between table and the negative terminal of the output wiring terminal 4.
Wherein, the first output isolating diode 9 is described in positive pole flow direction of the electric current from the output end of boost module 3
The positive terminal direction conducting of output wiring terminal 4, reversely cut-off.The second output isolating diode 10 is in electric current from described
The negative terminal of output wiring terminal 4 flows to the direction conducting of the current monitoring table of the first Current Voltage monitoring module 5, instead
To cut-off.By setting the first output isolating diode 9 and the second output isolating diode 10, prevent from aiding in
Device is in parallel for the generation backflow in servicing unit when branch road power supply is investigated in straight-flow system.
Based on above-described embodiment, described device also includes the first export insurance pipe 11 and the second export insurance pipe 12, described
First export insurance pipe 11 is serially connected in the positive pole of the output end of boost module 3 and the positive terminal of the output wiring terminal 4
Between, the second export insurance pipe 12 is serially connected in the current monitoring table of the first Current Voltage monitoring module 5 and described defeated
Go out between the negative terminal of binding post 4.
Specifically, by setting the first export insurance pipe 11 and the two export insurances pipe 12, prevent from filling in auxiliary
Put and be that straight-flow system parallel connection is that servicing unit output current is excessive when branch road power supply is investigated.
Based on above-described embodiment, described device also includes alarm module 13, and the alarm module 13 includes voltage comparator
And buzzer, when institute's power supply states the closure of switch 2, the voltage comparator is in parallel with the battery pack.
Specifically, the alarm module be used for the battery pack 1 overtension or it is too low when pass through buzzer
Send alarm.
Wherein, the voltage comparator can set certain threshold range, when the magnitude of voltage that battery pack 1 exports exceeds this
During individual scope, voltage comparator control buzzer sends alarm, to prompt maintainer to be handled in time.
Based on above-described embodiment, the battery pack is 36V, 12AH lithium battery group.
Specifically, the battery pack can be：Ni-MH battery group, lead-acid battery group and lithium battery group etc..This practicality is new
Power supply of the preferred lithium battery group of type embodiment as servicing unit, because lithium battery has the characteristics of electricity is big, in light weight.
Based on above-described embodiment, described device also includes：Boost module 3, first the 5, second electricity of Current Voltage monitoring module
Flow voltage monitoring module 6, current divider 7, supervisory circuit power transfer module 8, first export isolating diode 9, second output every
From diode 10, the first export insurance pipe 11, the second export insurance pipe 12 and alarm module 13；Wherein,
The boost module 3 is switch DC booster circuit, the positive pole of the input of boost module 3 and the battery pack
1 positive pole is connected, and the negative pole of the input of boost module 3 is connected with the negative pole of the battery pack 1；
The positive pole of the voltage monitoring table of the first Current Voltage monitoring module 5 and the output end of the boost module 3
Positive pole is connected, the negative pole of the voltage monitoring table of the first Current Voltage monitoring module 5 and the output end of the boost module 3
Negative pole is connected, and the current monitoring table of the first Current Voltage monitoring module 5 is being serially connected in the output end of the boost module 3 just
Between pole and negative pole；
The positive pole of the voltage monitoring table of the second Current Voltage monitoring module 6 and the input of the boost module 3
Positive pole is connected, the negative pole of the voltage monitoring table of the second Current Voltage monitoring module 6 and the input of the boost module 3
Negative pole is connected, and the current monitoring table of the second Current Voltage monitoring module 6 is in parallel with the current divider 7, and the current divider 7 is gone here and there
It is connected between the battery pack 1 and the boost module 3；
The positive pole of the input of the supervisory circuit power transfer module 8 is connected with the positive pole of the battery pack 1, the prison
The negative pole of the input of control circuit power modular converter 8 is connected with the negative pole of the battery pack 1, the supervisory circuit Power convert
The positive pole of the output end of module 8 is electric with the positive pole of the power end of the first Current Voltage monitoring module 5 and second electric current respectively
Press the positive pole connection of the power end of monitoring module 6, the negative pole of the output end of supervisory circuit power transfer module 8 is respectively with described the
The negative pole of the power end of one Current Voltage monitoring module 5 connects with the negative pole of the power end of the second Current Voltage monitoring module 6；
The first output isolating diode 9 is serially connected in the positive pole of the output end of boost module 3 and the output connection
Between the positive terminal of post 4, the second output isolating diode 10 is serially connected in the first Current Voltage monitoring module 5
Current monitoring table and the output wiring terminal 4 negative terminal between；
The first export insurance pipe 11 is serially connected in the positive pole and the output wiring terminal 4 of the output end of boost module 3
Positive terminal between, the second export insurance pipe 12 be serially connected in the first Current Voltage monitoring module 5 electric current prison
Control between table and the negative terminal of the output wiring terminal 4；
The alarm module 13 includes voltage comparator and buzzer, when institute's power supply states the closure of switch 2, the voltage ratio compared with
Device is in parallel with the battery pack.
Finally it should be noted that：Above example is only to illustrate the technical solution of the utility model, rather than its limitations；
Although the utility model is described in detail with reference to the foregoing embodiments, it will be understood by those within the art that：
It can still modify to the technical scheme described in foregoing embodiments, or which part technical characteristic is carried out etc.
With replacement；And these modifications or replacement, the essence of appropriate technical solution is departed from various embodiments of the utility model technology
The spirit and scope of scheme.
Claims (10)
1. a kind of servicing unit for being used to search DC system grounding point failure, it is characterised in that described device includes battery pack
And output wiring terminal；Wherein,
The positive pole of the battery pack is connected with the positive terminal of the output wiring terminal, the negative pole of the battery pack with it is described defeated
Go out the negative terminal connection of binding post；
The positive terminal and negative terminal of the output wiring terminal access branch road to be investigated by polarity respectively.
2. device according to claim 1, it is characterised in that described device also includes boost module, and the boost module is
DC voltage booster circuit, the positive pole of the boost module input are connected with the positive pole of the battery pack, the boost module input
The negative pole at end is connected with the negative pole of the battery pack.
3. device according to claim 2, it is characterised in that described device also includes the first Current Voltage monitoring module, institute
The positive pole for stating the voltage monitoring table of the first Current Voltage monitoring module is connected with the positive pole of the output end of the boost module, described
The negative pole of the voltage monitoring table of first Current Voltage monitoring module is connected with the negative pole of the output end of the boost module, and described
The current monitoring table of one Current Voltage monitoring module is serially connected in the negative pole of the output end of the boost module.
4. device according to claim 3, it is characterised in that described device also includes the second Current Voltage monitoring module, institute
The positive pole for stating the voltage monitoring table of the second Current Voltage monitoring module is connected with the positive pole of the input of the boost module, described
The negative pole of the voltage monitoring table of second Current Voltage monitoring module is connected with the negative pole of the input of the boost module, and described
The current monitoring table of two Current Voltage monitoring modules is serially connected in the negative pole of the input of the boost module.
5. device according to claim 4, it is characterised in that described device also includes current divider, and the current divider is serially connected with
Between the battery pack and the boost module, and the current monitoring table of the second Current Voltage monitoring module and the shunting
Device is in parallel.
6. device according to claim 4, it is characterised in that described device also includes supervisory circuit power transfer module, institute
The positive pole for stating the input of supervisory circuit power transfer module is connected with the positive pole of the battery pack, and the supervisory circuit power supply turns
The negative pole for changing the mold the input of block is connected with the negative pole of the battery pack, and the supervisory circuit power transfer module output end is just
The pole positive pole with the first Current Voltage monitoring module power end and the second Current Voltage monitoring module power end respectively
Positive pole connection, the negative pole of the supervisory circuit power transfer module output end respectively with the first Current Voltage monitoring module
The negative pole of power end connects with the negative pole of the second Current Voltage monitoring module power end.
7. device according to claim 3, it is characterised in that described device also includes the first output isolating diode and second
Isolating diode is exported, the first output isolating diode is serially connected in the positive pole of the boost module output end and the output
Between the positive terminal of binding post, the second output isolating diode is serially connected in the first Current Voltage monitoring module
Between the negative terminal of current monitoring table and the output wiring terminal.
8. device according to claim 3, it is characterised in that described device also includes the first export insurance pipe and the second output
Protective tube, the first export insurance pipe are serially connected in the positive pole of the boost module output end and the positive pole of the output wiring terminal
Between binding post, the second export insurance pipe is serially connected in the current monitoring table of the first Current Voltage monitoring module and described
Between the negative terminal of output wiring terminal.
9. device according to claim 1, it is characterised in that described device also includes alarm module, the alarm module bag
Voltage comparator and buzzer are included, the voltage comparator is in parallel with the battery pack.
10. device according to claim 1, it is characterised in that described device also includes：Boost module, the first Current Voltage
It is monitoring module, the second Current Voltage monitoring module, supervisory circuit power transfer module, the first output isolating diode, second defeated
Go out isolating diode, current divider, the first export insurance pipe, the second export insurance pipe and alarm module；Wherein,
The boost module is DC voltage booster circuit, the positive pole of the boost module input and the positive pole phase of the battery pack
Even, the negative pole of the boost module input is connected with the negative pole of the battery pack；
The positive pole of the voltage monitoring table of the first Current Voltage monitoring module and the positive pole phase of the output end of the boost module
Even, the negative pole of the voltage monitoring table of the first Current Voltage monitoring module and the negative pole phase of the output end of the boost module
Even, the current monitoring table of the first Current Voltage monitoring module is serially connected in the negative pole of the output end of the boost module；
The positive pole of the voltage monitoring table of the second Current Voltage monitoring module and the positive pole phase of the input of the boost module
Even, the negative pole of the voltage monitoring table of the second Current Voltage monitoring module and the negative pole phase of the input of the boost module
Even, the current monitoring table of the second Current Voltage monitoring module is in parallel with the current divider, and the current divider is serially connected with described
Between battery pack and the boost module；
The positive pole of the input of the supervisory circuit power transfer module is connected with the positive pole of the battery pack, the supervisory circuit
The negative pole of the input of power transfer module is connected with the negative pole of the battery pack, the supervisory circuit power transfer module output
The positive pole at the end positive pole with the first Current Voltage monitoring module power end and the second Current Voltage monitoring module respectively
The positive pole connection of power end, the negative pole of the supervisory circuit power transfer module respectively with the first Current Voltage monitoring module
The negative pole of power end connects with the negative pole of the second Current Voltage monitoring module power end；
It is described first output isolating diode be serially connected in the boost module output end positive pole and the output wiring terminal just
Between the binding post of pole, the second output isolating diode is serially connected in the current monitoring table of the first Current Voltage monitoring module
Between the negative terminal of the output wiring terminal；
The positive pole of positive pole and the output wiring terminal that the first export insurance pipe is serially connected in the boost module output end connects
Between terminal, the second export insurance pipe is serially connected in the current monitoring table of the first Current Voltage monitoring module and described defeated
Go out between the negative terminal of binding post；
The alarm module includes voltage comparator and buzzer, and the voltage comparator is in parallel with the battery pack.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721037028.8U CN207067306U (en) | 2017-08-15 | 2017-08-15 | For searching the servicing unit of DC system grounding point failure |
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| CN201721037028.8U CN207067306U (en) | 2017-08-15 | 2017-08-15 | For searching the servicing unit of DC system grounding point failure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112327207A (en) * | 2020-10-31 | 2021-02-05 | 贵州电网有限责任公司 | Portable direct current system ground fault judgment device and use method thereof |
| CN115469245A (en) * | 2022-09-15 | 2022-12-13 | 贵州电网有限责任公司 | Portable pull-out direct current system ground fault auxiliary searching method |
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2017
- 2017-08-15 CN CN201721037028.8U patent/CN207067306U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112327207A (en) * | 2020-10-31 | 2021-02-05 | 贵州电网有限责任公司 | Portable direct current system ground fault judgment device and use method thereof |
| CN112327207B (en) * | 2020-10-31 | 2022-09-16 | 贵州电网有限责任公司 | Portable direct current system ground fault judgment device and use method thereof |
| CN115469245A (en) * | 2022-09-15 | 2022-12-13 | 贵州电网有限责任公司 | Portable pull-out direct current system ground fault auxiliary searching method |
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