CN205921371U - Disconnected zero lacks looks protection device and power system fault positioner - Google Patents
Disconnected zero lacks looks protection device and power system fault positioner Download PDFInfo
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- CN205921371U CN205921371U CN201620567572.2U CN201620567572U CN205921371U CN 205921371 U CN205921371 U CN 205921371U CN 201620567572 U CN201620567572 U CN 201620567572U CN 205921371 U CN205921371 U CN 205921371U
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Abstract
The utility model discloses a whether disconnected zero lacks looks protection device and power system fault positioner determines the power line through the signal intelligence between the power line communication device and breaks down, and which section power line breaks down, and which piece line ABCPEN takes a fancy to takes place the disconnection fault to the disconnection of that section power line that the messenger broke down is connected with the electric wire netting, and realize accurate locate a fault point and amputate the trouble, and no matter ABCPEN takes a fancy to which piece line emergence disconnection fault, the utility model discloses can both make the circuit breaker move, the excision trouble, it can not be to the disconnected zero scarce defect of effectively protecting mutually among the prior art to have overcome. And simultaneously, the utility model discloses in the power line communication device, controlling means and the low -voltage circuit breaker that use all be very ripe product among the prior art, practiced thrift the cost, use widely easily.
Description
Technical field
This utility model is related to Power System Faults Detection field and in particular to a kind of phase-lacking protective device off zero and electrical network
Fault locator.
Background technology
Low-voltage circuit breaker is typically selected at present as the main protection device of low-voltage network in power domain.Low pressure open circuit
Device is that one kind not only can be connected and disjunction normal duty electric current and overload electric current, can also connect and disjunction short circuit current
Device for switching.Low-voltage circuit breaker in addition to playing control action, also has certain defencive function in circuit, such as overload, short circuit,
Under-voltage and earth leakage protective etc..Be short-circuited when low-voltage network, earth fault, the fault such as electric leakage when, low-voltage circuit breaker all can be very
Action is by failure removal well, but when there is off zero or open-phase fault, chopper cannot be by failture evacuation, or even in this skill
In art field, never effective method or apparatus are solving the problems, such as phase shortage off zero.Below phase shortage off zero is carried out
Simple introduction:
In low-voltage distribution system (tn-c system: a, b, c, pen, tn-s system: a, b, c, n, pe), a, b, c are phase (fiery)
Line, n line is center line, and pe line is protective wire, and pen line doubles as ground protection line for working zero line.In tn system, pe line is not allow
Disconnect, and n line can disconnect under special circumstances, but must disconnect together with a, b, c phase line and (on stricti jurise, say that n line must
Could must disconnect after a, b, c phase line disconnects).During tn system operation, pen or n line is not allow to disconnect, if occurring
Pen or n line disconnects and produces " off zero " fault.For a long time, it is to have during " off zero " fault that pen the or n line that is in operation disconnects
Occur, in the case of there is single-phase load, threephase load is mostly uneven, leads to neutral displacement, when there is fault off zero, will
Cause phase voltage to raise suddenly, beyond more than 1.3 times of specified phase voltage, chopper akinesia, so certainly will cause single-phase setting
Standby damage, threephase motor cannot normally run, and What is more is also possible to be led to casualties.And work as a in low-voltage network, b,
When wherein one certain reason of phase phase line of c three-phase breaks (phase shortage), also can make three phase electric equipment (particularly three-phase electric
Machine) cannot normal work, even result in accident.
Utility model content
The purpose of the application is the defect solving prior art, provides a kind of phase-lacking protective device off zero, existing to overcome
Can not find and exclude the defect of the open-phase fault off zero occurring in low-voltage network in technology in time, the technical scheme of employing is such as
Under:
A kind of phase-lacking protective device off zero, including the power line communication apparatus being connected on the n point selected on electric lines of force, string
Low-voltage circuit breaker on front n-1 point in the n point selected and n-1 control device, described n-1 control are connected on electric lines of force
Device processed goes forward power line communication apparatus on n-1 point respectively with electric lines of force and low-voltage circuit breaker electrically connects, on each point
Power line communication apparatus pass through power line communication with the power line communication apparatus on adjacent next point.
Power line communication full name is power line carrier communication, refers to (usual in power carrier field using high-voltage power line
Refer to 35kv and above), medium voltage power line (referring to 10kv electric pressure) or low-voltage distribution wire (380/220v user's line)
Carry out a kind of specific communication mode of voice or data transfer as information transmitting medium.
Because power line communication apparatus are intrinsic, when between two points, one section of electric lines of force conducting is good, this two
After communication between the power line communication apparatus of point is very good, and a certain phase line working as this section of electric lines of force breaks, two
Between power line communication apparatus, the communication for this line just breaks, and therefore passes through mutual communication between power line communication apparatus
Whether well to detect position (which section electric lines of force breaks down) and fault that whether electric lines of force break down, break down
Type is very effective.This utility model uses this principle, by the signal intelligence between power line communication apparatus
To judge whether electric lines of force breaks down, which section electric lines of force breaks down, and in a/b/c/pen phase, that single line occurs broken string event
Barrier.Control device then check receive power line communication apparatus signal intelligence, if the power line communication apparatus being electrically connected with
Communication between adjacent next one power line communication apparatus is broken, then control the low-voltage circuit breaker being attached thereto to disconnect, so that therefore
The electric lines of force of barrier section is disconnected with electrical network.Substantially, no matter which section breaks down, and in a/b/c/pen phase, that single line occurs
Disconnection fault, this utility model can make electric lines of force disconnection and the connection of electrical network of corresponding section, excise fault, overcome existing
Phase shortage off zero can not be carried out in technology with the defect of effective protection, and use in this utility model power line communication apparatus,
Control device and low-voltage circuit breaker are all highly developed products in prior art, have saved cost, have easily promoted the use of.
Preferably, described n-1 control device has been both electrically connected with storage device.
Described storage device is used for storing the information such as abort situation, fault type.
Preferably, described low-voltage circuit breaker has electrically connected alarm device, described alarm device has electrically connected communicator,
Described alarm device is used for, after circuit breaker trip isolated fault, sending alarm signal, and sending to binding by communicator
The electronic equipment of maintainer and background system.
Preferably, described communicator is gsm module.
Preferably, described power line communication apparatus are electric power modem.
The application another object is that the defect solving prior art, provides a kind of electric network fault localization method, employing
Technical scheme is as follows:
A kind of electric network fault positioner, including the power line communication apparatus being connected on the n point selected on electric lines of force, often
Power line communication apparatus on individual point pass through power line communication with the power line communication apparatus on adjacent next point, if adjacent two
The communication of the power line communication device on point disconnects, then illustrate that the power line section between this two points breaks down.
With the development of power system, power system transmission line electric pressure and transmission capacity are all stepping up, defeated
The fault of electric line is accurately positioned technology and is also increasingly paid attention to by people.Fault is accurately positioned and can help work of electric power system
Personnel accurately and rapidly find abort situation, and this repairs circuit, recovers reliable power supply it is ensured that the peace of power system for timely
Entirely stable and economical operation suffers from highly important effect.This utility model passes through to select n point installation electricity on electric lines of force
Line of force communicator, by these power line communication apparatus between communications status the fault occurring in electric lines of force is specifically navigated to
Electric lines of force between which two point breaks down, and facilitates maintainer to be overhauled.
Compared with prior art, the beneficial effects of the utility model:
By the signal intelligence between power line communication apparatus, this utility model judges whether electric lines of force breaks down, which
Section electric lines of force breaks down, and in a/b/c/pen phase, which single line occurs disconnection fault, and so that section of electric lines of force breaking down is broken
Open the connection with electrical network, realize being accurately positioned trouble point and excising fault, and no matter which single line occurs in a/b/c/pen phase
Disconnection fault, this utility model can make breaker actuation, excises fault, overcoming can not be to phase shortage off zero in prior art
Carry out the defect of effective protection.Meanwhile, power line communication apparatus, control device and the low-voltage circuit breaker used in this utility model
It is all highly developed product in prior art, saved cost, easily promoted the use of.
Brief description
Fig. 1 is the structural representation of protection device of the present utility model；
Fig. 2 is the fundamental diagram of protection device of the present utility model.
Specific embodiment
With reference to the accompanying drawings and examples this utility model is described in further details.
Embodiment 1: as shown in figure 1, a kind of phase-lacking protective device off zero, including being connected on the n point selected on electric lines of force
Power line communication apparatus, the low-voltage circuit breaker being serially connected with the front n-1 point in the n point selected on electric lines of force and n-1
Control device, described n-1 control device is gone forward with electric lines of force power line communication apparatus on n-1 point and low pressure open circuit respectively
Device electrically connects, and the power line communication apparatus on each point pass through electric lines of force with the power line communication apparatus on adjacent next point and lead to
Letter.
Because power line communication apparatus are intrinsic, when between two points, one section of electric lines of force conducting is good, this two
After communication between the power line communication apparatus of point is very good, and a certain phase line working as this section of electric lines of force breaks, two
Between power line communication apparatus, the communication for this line just breaks, and therefore passes through mutual communication between power line communication apparatus
Whether well to detect position (which section electric lines of force breaks down) and fault that whether electric lines of force break down, break down
Type is very effective.The present embodiment use this principle, by the signal intelligence between power line communication apparatus Lai
Judge whether electric lines of force breaks down, which section electric lines of force breaks down, in a/b/c/pen phase, that single line occurs disconnection fault.
Control device then check receive power line communication apparatus signal intelligence, if the power line communication apparatus being electrically connected with adjacent
Communication between next power line communication apparatus is broken, then control the low-voltage circuit breaker being attached thereto to disconnect, so that faulty section
Electric lines of force disconnect with electrical network.Substantially, no matter which section breaks down, and in a/b/c/pen phase, that single line breaks
Fault.
Described n-1 control device has been both electrically connected with storage device.
Described storage device is used for storing the information such as abort situation, fault type.
Described low-voltage circuit breaker has electrically connected alarm device, and described alarm device has electrically connected communicator, described warning
Device is used for, after circuit breaker trip isolated fault, sending alarm signal, and sending by communicator to the maintenance people of binding
The electronic equipment of member and background system.
In the present embodiment, described communicator is gsm module.
In the present embodiment, described power line communication apparatus are electric power modem.
In Fig. 2, four points are selected on electric lines of force, power line communication apparatus, a control are all installed on first three point
Device and low-voltage circuit breaker, low-voltage circuit breaker, control device and power line communication apparatus that each is put are sequentially connected electrically, wherein
11st, 12,13,14 is power line communication apparatus, and 21,22,23 is control device, and 31,32,33 is low-voltage circuit breaker.For example, when
Section electric lines of force conducting good when, the communication between power line communication apparatus 11 and 12 is good, if but section electric lines of force which
Phase line breaks, then just disconnected with respect to this phase line between power line communication apparatus 11 and 12, this timed unit 21 controls low
Voltage breaker 31 action, disconnects the connection of section electric lines of force and electrical network, excises fault.And for example, when the conducting of section electric lines of force is good
When, the communication between power line communication apparatus 12 and 13 is good, if but which phase line of section electric lines of force is broken, electricity
Just disconnected with respect to this phase line between line of force communicator 12 and 13, this timed unit 22 controls low-voltage circuit breaker 32 action,
Disconnect the connection of section electric lines of force and electrical network, excise fault.
The present embodiment also includes storing abort situation and fault type information.
After the present embodiment is additionally included in excision fault, produces alarm signal, and alarm signal is sent to the maintenance of binding
The electronic equipment of personnel or background system.
Described power line communication device is electric power modem.
Claims (5)
1. a kind of phase-lacking protective device off zero is it is characterised in that the electric lines of force including being connected on the n point selected on electric lines of force leads to
T unit, the low-voltage circuit breaker being serially connected with the front n-1 point in the n point selected on electric lines of force and n-1 control device, institute
State the power line communication apparatus that n-1 control device go forward with electric lines of force on n-1 point respectively and low-voltage circuit breaker electrically connects, often
Power line communication apparatus on individual point pass through power line communication with the power line communication apparatus on adjacent next point.
2. a kind of phase-lacking protective device off zero according to claim 1 it is characterised in that described n-1 control device all
Electrically connect storage device.
3. a kind of phase-lacking protective device off zero according to claim 1 is it is characterised in that described low-voltage circuit breaker electrically connects
Alarm device, described alarm device has electrically connected communicator.
4. a kind of phase-lacking protective device off zero according to claim 1 is it is characterised in that described power line communication apparatus are
Electric power modem.
5. a kind of electric network fault positioner is it is characterised in that the electric lines of force including being connected on the n point selected on electric lines of force leads to
T unit, the power line communication apparatus on each point pass through electric lines of force with the power line communication apparatus on adjacent next point and lead to
Letter, if the communication of the power line communication device on adjacent 2 points disconnects, illustrates that the power line section between this two points occurs event
Barrier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620567572.2U CN205921371U (en) | 2016-06-14 | 2016-06-14 | Disconnected zero lacks looks protection device and power system fault positioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620567572.2U CN205921371U (en) | 2016-06-14 | 2016-06-14 | Disconnected zero lacks looks protection device and power system fault positioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205921371U true CN205921371U (en) | 2017-02-01 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620567572.2U Active CN205921371U (en) | 2016-06-14 | 2016-06-14 | Disconnected zero lacks looks protection device and power system fault positioner |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105977931A (en) * | 2016-06-14 | 2016-09-28 | 璧垫椽 | Disconnected-null-line and default-phase protection apparatus and method, and power grid fault positioning apparatus |
| CN110854863A (en) * | 2019-10-23 | 2020-02-28 | 清远市昭元电力科技有限公司 | Power control system |
-
2016
- 2016-06-14 CN CN201620567572.2U patent/CN205921371U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105977931A (en) * | 2016-06-14 | 2016-09-28 | 璧垫椽 | Disconnected-null-line and default-phase protection apparatus and method, and power grid fault positioning apparatus |
| CN110854863A (en) * | 2019-10-23 | 2020-02-28 | 清远市昭元电力科技有限公司 | Power control system |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190808 Address after: 528000 C401, No. 35, Pulan Second Road, Chancheng District, Foshan City, Guangdong Province (Business premises must be examined and approved by the examination and approval authorities) Patentee after: Foshan Xiangdian Electric Power Design Engineering Co., Ltd. Address before: Room 705, 20 Rose Street, Chancheng District, Foshan City, Guangdong Province Patentee before: Zhao Hong |