CN207181530U - Insulating monitoring direct current network insulation against ground resistance measuring circuit peculiar to vessel - Google Patents
Insulating monitoring direct current network insulation against ground resistance measuring circuit peculiar to vessel Download PDFInfo
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- CN207181530U CN207181530U CN201721068070.6U CN201721068070U CN207181530U CN 207181530 U CN207181530 U CN 207181530U CN 201721068070 U CN201721068070 U CN 201721068070U CN 207181530 U CN207181530 U CN 207181530U
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- flow system
- insulation against
- ground resistance
- against ground
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Abstract
The utility model discloses a kind of insulating monitoring direct current network insulation against ground resistance measuring circuit peculiar to vessel, including straight-flow system main track, straight-flow system negative wire, main track insulation against ground resistance, negative wire insulation against ground resistance, the first sampling apparatus, the second sampling apparatus, first switch, second switch and load；Load is connected between straight-flow system main track and straight-flow system negative wire；Main track insulation against ground resistance is connected between straight-flow system main track and ground；Negative wire insulation against ground resistance is connected between straight-flow system negative wire and ground；First sampling apparatus and first switch are connected between straight-flow system main track and ground；Second sampling apparatus and second switch are connected between straight-flow system negative wire and ground.The utility model can realize the real-time monitoring of insulating monitoring direct current network insulation against ground resistance peculiar to vessel, have measurement accuracy height, securely and reliably, and the advantages of little power consumption.
Description
Technical field
The utility model belongs to Ship Electrical Power System technical field, and it is exhausted over the ground to be related to a kind of insulating monitoring direct current network peculiar to vessel
Edge resistance measuring circuit.
Background technology
With the increasingly increase of shipboard power system capacity, network structure is also increasingly complicated, thus the insulation shape to network
The requirement of state monitoring judgement also increasingly improves.Because the environment on naval vessel is more severe, many electrical equipments are by salt fog, wet
The factors such as degree, mould have a great influence, so the incidence that power system insulation reduces failure is higher；And Grounding is complicated,
Ground connection may all occur from high resistance ground to direct metal, so as to cause earth current amplitude excursion larger.Ship electric network
In various loads it is various, wiring is complicated, fire that the insulation because handling generation not in time reduces failure and thus triggered and alternate
The major accident of short circuit is of common occurrence, and greatly threat is formed to the vitality on naval vessel.Therefore, shipboard power system network is studied
The monitoring problem of state of insulation, for improving the power supply continuity of shipboard power system, reducing the labor intensity of warship person, there is weight
Want meaning.
Utility model content
The purpose of this utility model is to provide a kind of insulating monitoring direct current network insulation against ground resistance measuring circuit peculiar to vessel,
Realize the continuous real time on-line monitoring of long-time of insulating monitoring direct current network insulation against ground resistance peculiar to vessel.
In order to achieve the above object, solution of the present utility model is：
A kind of insulating monitoring direct current network insulation against ground resistance measuring circuit peculiar to vessel, including straight-flow system main track, direct current system
Unite negative wire, main track insulation against ground resistance, negative wire insulation against ground resistance, the first sampling apparatus, the second sampling apparatus, first switch,
Second switch and load；
The load is connected between straight-flow system main track and straight-flow system negative wire；
One end connection straight-flow system main track of the main track insulation against ground resistance, other end ground connection；
One end connection straight-flow system negative wire of the negative wire insulation against ground resistance, other end ground connection；
One end of first sampling apparatus connects straight-flow system main track, is grounded after other end series connection first switch；
One end of second sampling apparatus connects straight-flow system negative wire, is grounded after other end series connection second switch.
According to one side of the present utility model, first sampling apparatus and the second sampling apparatus have internal resistance respectively.
Due to being using such scheme, the beneficial effects of the utility model：
The utility model can realize the real-time monitoring of insulating monitoring direct current network insulation against ground resistance peculiar to vessel, have measurement
Precision is high, securely and reliably, and the advantages of little power consumption.The utility model insulaion resistance total to operating direct current network
Line measure, when to insulaion resistance on-line measurement, do not influenceed by the distribution capacity of power network, and for positive pole over the ground, negative pole
The impartial situation about reducing of insulation against ground resistance, also can accurately measure power network insulation against ground resistance.In addition, use the utility model
During measurement any signal is not added so being passive measurement into network.
Brief description of the drawings
In order to illustrate more clearly of the technical scheme in the embodiment of the utility model, will make below to required in embodiment
Accompanying drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the utility model,
For those of ordinary skill in the art, on the premise of not paying creative work, can also be obtained according to these accompanying drawings
Other accompanying drawings.
Fig. 1 is schematic diagram of the present utility model.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out
Clearly and completely describing, it is clear that described embodiment is only the utility model part of the embodiment, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment obtained, belong to the scope of the utility model protection.
As shown in figure 1, the utility model include straight-flow system main track, straight-flow system negative wire, main track insulation against ground resistance R+,
Negative wire insulation against ground resistance R-, the first sampling apparatus V1, the second sampling apparatus V2, first switch K1, second switch K2 and negative
Carry.
Load is connected between straight-flow system main track and straight-flow system negative wire；Main track insulation against ground resistance R+ one end connection
Straight-flow system main track, other end ground connection；Negative wire insulation against ground resistance R- one end connection straight-flow system negative wire, other end ground connection；
First sampling apparatus V1 one end connects straight-flow system main track, is grounded after other end series connection first switch K1；Second sampling
Device V2 one end connects straight-flow system negative wire, is grounded after other end series connection second switch K2.
Measuring principle of the present utility model is：Measure respectively the main track of direct current network over the ground, negative wire it is over the ground and positive and negative
Voltage between line, it is possible to calculate the insulating resistance value of direct current network.
In Fig. 1, R+ and R- is respectively the total insulaion resistance of straight-flow system main track, negative wire over the ground.Sampling apparatus V1, V2
Internal resistance be R1, R2 respectively.
Measurement process is：
It is all separated that K1, K2 will be switched first, measure the voltage U between positive and negative line；Then K2 points of K1 closures, switch is switched
Open (now sampling apparatus internal resistance is R1), it is measurable go out main track over the ground between voltage U+, then
Switch K2 is closed, switchs K1 and separate again, (now sampling apparatus internal resistance is R2), it is measurable go out negative wire over the ground between
Voltage U-, then
It can be drawn according to formula (1), (2)：
As R1=R2=RB, formula can be reduced to：
Then the total insulation against ground resistance of straight-flow system network is：
Showing by practical application, the total insulaion resistance of the utility model measurement direct current network is simple and reliable, and precision is higher,
Do not influenceed by other factors, suitable for continuous on-line monitoring for a long time.
The above-mentioned description to embodiment is understood that for ease of those skilled in the art and using originally special
Profit.Person skilled in the art obviously easily can make various modifications to these embodiments, and described herein
General Principle is applied in other embodiment without by performing creative labour.Therefore, the utility model is not limited to here
Embodiment, those skilled in the art according to announcement of the present utility model, do not depart from improvement that the utility model category made and
Modification all should be within the scope of protection of the utility model.
Claims (2)
- A kind of 1. insulating monitoring direct current network insulation against ground resistance measuring circuit peculiar to vessel, it is characterised in that：Including straight-flow system main track, straight-flow system negative wire, main track insulation against ground resistance, negative wire insulation against ground resistance, the first sampling Device, the second sampling apparatus, first switch, second switch and load；The load is connected between straight-flow system main track and straight-flow system negative wire；One end connection straight-flow system main track of the main track insulation against ground resistance, other end ground connection；One end connection straight-flow system negative wire of the negative wire insulation against ground resistance, other end ground connection；One end of first sampling apparatus connects straight-flow system main track, is grounded after other end series connection first switch；One end of second sampling apparatus connects straight-flow system negative wire, is grounded after other end series connection second switch.
- 2. insulating monitoring direct current network insulation against ground resistance measuring circuit peculiar to vessel according to claim 1, it is characterised in that： First sampling apparatus and the second sampling apparatus have internal resistance respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721068070.6U CN207181530U (en) | 2017-08-24 | 2017-08-24 | Insulating monitoring direct current network insulation against ground resistance measuring circuit peculiar to vessel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721068070.6U CN207181530U (en) | 2017-08-24 | 2017-08-24 | Insulating monitoring direct current network insulation against ground resistance measuring circuit peculiar to vessel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207181530U true CN207181530U (en) | 2018-04-03 |
Family
ID=61738816
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721068070.6U Active CN207181530U (en) | 2017-08-24 | 2017-08-24 | Insulating monitoring direct current network insulation against ground resistance measuring circuit peculiar to vessel |
Country Status (1)
| Country | Link |
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| CN (1) | CN207181530U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110873845A (en) * | 2018-08-31 | 2020-03-10 | 宁德时代新能源科技股份有限公司 | Insulation detection method |
| CN110967557A (en) * | 2019-02-25 | 2020-04-07 | 宁德时代新能源科技股份有限公司 | Detection circuit and method |
-
2017
- 2017-08-24 CN CN201721068070.6U patent/CN207181530U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110873845A (en) * | 2018-08-31 | 2020-03-10 | 宁德时代新能源科技股份有限公司 | Insulation detection method |
| US11085960B2 (en) | 2018-08-31 | 2021-08-10 | Contemporary Amperex Technology Co., Limited | Insulation detection method |
| CN110967557A (en) * | 2019-02-25 | 2020-04-07 | 宁德时代新能源科技股份有限公司 | Detection circuit and method |
| WO2020173429A1 (en) * | 2019-02-25 | 2020-09-03 | 宁德时代新能源科技股份有限公司 | Detection circuit and method |
| US11258278B2 (en) | 2019-02-25 | 2022-02-22 | Contemporary Amperex Technology Co., Limited | Detection circuit and method |
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