CN205484653U - Net route selection device is joined in marriage in resistance disturbance - Google Patents
Net route selection device is joined in marriage in resistance disturbance Download PDFInfo
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- CN205484653U CN205484653U CN201620238316.9U CN201620238316U CN205484653U CN 205484653 U CN205484653 U CN 205484653U CN 201620238316 U CN201620238316 U CN 201620238316U CN 205484653 U CN205484653 U CN 205484653U
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Abstract
The utility model discloses a net route selection device is joined in marriage in resistance disturbance. It includes branch road (3) of connection bus (1), and digital signal processor (2) be connected with the secondary side electricity that concatenates each current transformer in branch road (3) return circuit, especially concatenated between generating line (1) and ground wire (4) disturbance device (5), disturbance device (5) are parallel connection's a high -voltage switch (K1), the 2nd high -voltage switch (K2) and the 3rd high -voltage switch's (K3) moving contact series connection respectively has first resistor (R1), second resistor (R2) and third resistor (R3), and the series connection has fourth resistor (R4) on the common tie point of the other end of three resistors, the output of digital signal processor (2) is connected with three high -voltage switch's control end electricity, a triggering signal for providing closed high -voltage switch moving contact. Its route selection is accurate, can be used for small current neutral grounding sys tem widely.
Description
Technical field
This utility model relates to a kind of line selection apparatus, particularly a kind of resistance disturbance distribution line selection apparatus.
Background technology
China 6～66kV medium voltage network commonly used neutral non-effective grounding mode, it is also referred to as small current neutral grounding system,
Advantage is that earth current is little, transient earthing can not cause switch trip, power supply reliability high.But when permanent connecing occurs
During earth fault, in order to prevent because of the rising of healthy phases voltage, insulation damages, causing trouble expands, it is necessary to select rapidly and accurately
Be out of order circuit being excised, such as entitled " one-phase grounding wire-selective device based on microvariations principle ", " relay " 2007
Year volume 35 the 2nd phase article of page 22～24.The one-phase grounding wire-selective device mentioned in this article by connect bus branch road,
The arc suppression coil being connected across between neutral point and ground, and respectively with secondary side, the arc suppression coil of the current transformer in branch road
Control end electrical connection bank of digital signal processors become；After there is singlephase earth fault, pass through digital signal processor
Current transformer is known and exports instantaneous triggering signal, and adjusting the tuning-off degree of arc suppression coil, the residual flow making earth point is corresponding
Change, so that the zero-sequence current of faulty line changes the most therewith.This line selection apparatus is less at the earth resistance of faulty circuit,
In the case of residual voltage is higher, it is judged that more accurate, so it there are still weak point, first, at ground connection transition resistance
In the case of relatively big, when changing system tuning-off degree, the variable quantity of residual voltage is the biggest, causes the zero-sequence current of non-fault line
Absolute value change substantially so that route selection is easily judged by accident；Secondly, when circuit length, the zero of cable feeder line that direct-to-ground capacitance is big
When the variable quantity of sequence electric current and faulty line are in same level, the most easily affect the correctness of route selection result.
Utility model content
The technical problems to be solved in the utility model is for overcoming weak point of the prior art, it is provided that a kind of rational in infrastructure, choosing
The line distribution line selection apparatus of resistance disturbance accurately.
For solving technical problem of the present utility model, the technical scheme used is: resistance disturbance distribution line selection apparatus includes even
Connect the branch road of bus, and with the first current transformer being serially connected with in branch-path, the second current transformer to the n-th electric current
The digital signal processor of the secondary side electrical connection of transformer, particularly,
It is serially connected with disturbance device between described bus and ground wire；
Described disturbance device is that the moving contact of the first high-voltage switch gear, the second high-voltage switch gear and the 3rd high-voltage switch gear that are connected in parallel divides
It is not connected in series with the first resistor, the second resistor and the 3rd resistor, and the first resistor, the second resistor and the 3rd
The 4th resistor it is connected in series with on the common connecting point of the other end of resistor；
The outfan of described digital signal processor and described first high-voltage switch gear, the second high-voltage switch gear and the 3rd high-voltage switch gear
Control end electrical connection, for providing the triggering signal of closed high switch movable contact.
Further improvement as resistance disturbance distribution line selection apparatus:
Preferably, the first high-voltage switch gear, the second high-voltage switch gear and the 3rd high-voltage switch gear are integral type Self-resetting high voltage connector.
Preferably, the resistance of the first resistor, the second resistor, the 3rd resistor and the 4th resistor is 100～10000
Ω。
Provide the benefit that relative to prior art:
After using such structure, as long as certain branch road generation single-phase earthing in branch road, digital signal processor will be because of sense
Know the signal of current transformer and send≤triggering the signal of 100ms to disturbance device so that the first high-voltage switch gear,
The moving contact of two high-voltage switch gears and the 3rd high-voltage switch gear is closed at, make in disturbance device by the first resistor, the second resistance
Residual voltage is formed on the brachium pontis of device, the 3rd resistor and the 4th resistor composition, and by residual voltage on the 4th resistor
Produce zero-sequence resistance current, and this zero-sequence resistance current only flows through and occurs certain branch road of single-phase earthing could form closed loop
Loop.Intensity due to this zero-sequence resistance current is much larger than the signal of the current transformer on original certain single-phase earthing branch road
Electric current, therefore easily identify, thus drastically increase the accuracy of route selection.
Accompanying drawing explanation
Fig. 1 is a kind of basic structure schematic diagram of the present utility model.
Detailed description of the invention
Below in conjunction with the accompanying drawings optimal way of the present utility model is described in further detail.
Seeing Fig. 1, the composition of resistance disturbance distribution line selection apparatus is as follows:
The branch road 3 of bus 1 and upper connection thereof, with first Current Transmit the 1, second electric current being serially connected with in branch road 3 loop
The digital signal processor 2 of the secondary side electrical connection of transformer CT2 to n-th Current Transmit n, be connected across bus 1 with
Disturbance device 5 between ground wire 4；Wherein,
Disturbance device 5 be connected in parallel the first high-voltage switch gear K1, the second high-voltage switch gear K2 and the 3rd high-voltage switch gear K3 dynamic
Contact is connected in series with the first resistor R1, the second resistor R2 and the 3rd resistor R3 respectively, and the first resistor R1,
It is connected in series with the 4th resistor R on the common connecting point of the other end of the second resistor R2 and the 3rd resistor R3；Wherein
The first high-voltage switch gear K1, the second high-voltage switch gear K2 and the 3rd high-voltage switch gear K3 be integral type Self-resetting high voltage connector,
One resistor R1, the second resistor R2, the resistance of the 3rd resistor R3 and the 4th resistor R4 be 500 (can be 100～
10000)Ω。
The outfan of digital signal processor 2 and the first high-voltage switch gear K1, the second high-voltage switch gear K2 and the 3rd high-voltage switch gear K3
The electrical connection of control end, for providing the triggering signal of closed high switch movable contact.
During use, when certain branch road generation singlephase earth fault in branch road 3, digital signal processor 2 will trigger and disturb
Dynamic device 5 action, and select the branch road that singlephase earth fault occurs the most exactly.
Obviously, those skilled in the art resistance disturbance distribution line selection apparatus of the present utility model can be carried out various change and
Modification is without deviating from spirit and scope of the present utility model.So, if these amendments of the present utility model and modification are belonged to
Within the scope of this utility model claim and equivalent technologies thereof, then this utility model is also intended to comprise these change and modification
Including.
Claims (3)
1. a resistance disturbance distribution line selection apparatus, including connect bus (1) branch road (3), and be serially connected with branch road
(3) the first current transformer (CT1) in loop, the second current transformer (CT2) to the n-th current transformer (CTn)
Secondary side electrical connection digital signal processor (2), it is characterised in that:
Disturbance device (5) it is serially connected with between described bus (1) and ground wire (4)；
Described disturbance device (5) is the first high-voltage switch gear (K1), the second high-voltage switch gear (K2) and the three-hypers being connected in parallel
The moving contact of (K3) of compressing switch is connected in series with the first resistor (R1), the second resistor (R2) and the 3rd resistor respectively
, and the common connection of the other end of the first resistor (R1), the second resistor (R2) and the 3rd resistor (R3) (R3)
The 4th resistor (R4) it is connected in series with on Dian；
The outfan of described digital signal processor (2) and described first high-voltage switch gear (K1), the second high-voltage switch gear (K2)
Electrically connect with the control end of the 3rd high-voltage switch gear (K3), for providing the triggering signal of closed high switch movable contact.
Resistance disturbance distribution line selection apparatus the most according to claim 1, it is characterized in that the first high-voltage switch gear (K1),
Two high-voltage switch gears (K2) and the 3rd high-voltage switch gear (K3) are integral type Self-resetting high voltage connector.
Resistance disturbance distribution line selection apparatus the most according to claim 1, it is characterized in that the first resistor (R1), second
The resistance of resistor (R2), the 3rd resistor (R3) and the 4th resistor (R4) is 100～10000 Ω.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620238316.9U CN205484653U (en) | 2016-03-23 | 2016-03-23 | Net route selection device is joined in marriage in resistance disturbance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620238316.9U CN205484653U (en) | 2016-03-23 | 2016-03-23 | Net route selection device is joined in marriage in resistance disturbance |
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| CN205484653U true CN205484653U (en) | 2016-08-17 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106771887A (en) * | 2017-03-13 | 2017-05-31 | 安徽天电气技术股份有限公司 | A kind of instantaneous zero sequence voltage drives ground fault line selection device |
| CN106814280A (en) * | 2017-03-13 | 2017-06-09 | 安徽天电气技术股份有限公司 | A kind of three resistance line voltages drive ground fault line selection device |
| CN106872857A (en) * | 2017-03-13 | 2017-06-20 | 安徽天电气技术股份有限公司 | A kind of residual voltage drives the ground fault line selection device of zero-sequence current |
| CN107064732A (en) * | 2017-03-13 | 2017-08-18 | 安徽天电气技术股份有限公司 | A kind of single resistance eutral grounding fault line selection device of line voltage driving |
| CN107271850A (en) * | 2017-07-01 | 2017-10-20 | 合肥东玖电气有限公司 | A kind of Small Electric Current Earthing And Routing Device |
| CN109239530A (en) * | 2018-10-11 | 2019-01-18 | 国网山东省电力公司东营供电公司 | A kind of intermediate distribution system fault-line selecting method, processor and device |
-
2016
- 2016-03-23 CN CN201620238316.9U patent/CN205484653U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106771887A (en) * | 2017-03-13 | 2017-05-31 | 安徽天电气技术股份有限公司 | A kind of instantaneous zero sequence voltage drives ground fault line selection device |
| CN106814280A (en) * | 2017-03-13 | 2017-06-09 | 安徽天电气技术股份有限公司 | A kind of three resistance line voltages drive ground fault line selection device |
| CN106872857A (en) * | 2017-03-13 | 2017-06-20 | 安徽天电气技术股份有限公司 | A kind of residual voltage drives the ground fault line selection device of zero-sequence current |
| CN107064732A (en) * | 2017-03-13 | 2017-08-18 | 安徽天电气技术股份有限公司 | A kind of single resistance eutral grounding fault line selection device of line voltage driving |
| CN107271850A (en) * | 2017-07-01 | 2017-10-20 | 合肥东玖电气有限公司 | A kind of Small Electric Current Earthing And Routing Device |
| CN109239530A (en) * | 2018-10-11 | 2019-01-18 | 国网山东省电力公司东营供电公司 | A kind of intermediate distribution system fault-line selecting method, processor and device |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20201029 Address after: 230031 No. 99 Yonghe Road, hi tech Development Zone, Anhui, Hefei Patentee after: ANHUI ONESKY ELECTRICAL TECHNOLOGY Co.,Ltd. Address before: 230088 No. 97-1 Yonghe Road, hi tech Development Zone, Anhui, Hefei Patentee before: ANHUI XINLI ELECTRICAL EQUIPMENT Co.,Ltd. |
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| TR01 | Transfer of patent right |