CN207994616U - It is a kind of based on the singlephase earth fault shielding system for applying signal outside - Google Patents
It is a kind of based on the singlephase earth fault shielding system for applying signal outside Download PDFInfo
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- CN207994616U CN207994616U CN201820518817.1U CN201820518817U CN207994616U CN 207994616 U CN207994616 U CN 207994616U CN 201820518817 U CN201820518817 U CN 201820518817U CN 207994616 U CN207994616 U CN 207994616U
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Abstract
The utility model provides a kind of based on the singlephase earth fault shielding system for applying signal outside, including overhead transmission line, breaker CB is equipped between the overhead transmission line and substation, the beginning of the overhead transmission line has been sequentially distributed several block switches to end, the overhead transmission line is separated into different track sections by several block switches, voltage transformer pt and Current Transmit are installed on the circuit of the block switch both sides, electric line between the breaker CB and block switch FS1 is installed on the sub-line circuit of same section of busbar and described outer applies signal generation apparatus WS, the outer signal generation apparatus WS that applies is for generating zero sequence characteristic signal sequence.It is described in the utility model based on the singlephase earth fault shielding system for applying signal outside, the singlephase earth fault problem occurred on distribution network line can be quickly isolated automatically, residual voltage sensor or mutual inductor need not additionally be increased, greatly save economic cost and social resources.
Description
Technical field
The utility model belongs to field of power, more particularly, to it is a kind of based on apply outside the singlephase earth fault of signal every
From system and partition method.
Background technology
Using neutral point, indirectly single-phase earthing event occurs the most of power distribution networks in China for system, this kind of system at present
When barrier, generally using the phase relation of zero-sequence current and residual voltage to detect earth fault, and closed using the exploration of switch
Again whether raised logical relation comes failure judgement position for lock and residual voltage, and makes opening for fault point adjacent both ends automatically
It closes and is in gate-dividing state automatically, to automatism isolation earth fault.But this method, which needs to switch, to have residual voltage to pass
Sensor or mutual inductor, otherwise cannot achieve, and can cause to switch cost increase in this way, probability of malfunction increases, and facts have proved
The accuracy needs that singlephase earth fault is detected based on transient signal feature are further increased, and lead to the reliability of automatism isolation not
It is high.
Invention content
In view of this, the utility model be directed to it is a kind of based on the singlephase earth fault shielding system for applying signal outside, with
Reliability is not high when solving the singlephase earth fault occurred on current automatism isolation distribution line, need residual voltage sensor or
Mutual inductor and lead to the higher problem of cost.
In order to achieve the above objectives, the technical solution of the utility model is realized in：
It is a kind of based on applying the singlephase earth fault shielding system of signal outside, including apply signal generation apparatus WS, Ruo Ganfen outside
Duan Kaiguan and trolley wire road are equipped with breaker CB, the breaker CB and first between the overhead transmission line and substation
Circuit between block switch FS1 or installed on the sub-line circuit of same section of busbar it is described it is outer apply signal generation apparatus WS, it is described
For generating zero sequence characteristic signal sequence, the beginning of the overhead transmission line has been sequentially distributed the outer signal generation apparatus WS that applies to end
The overhead transmission line is separated into different track sections, the segmentation by several block switches, several block switches
Switch includes Switch main body, controller FTU, Current Transmit and voltage transformer pt, the load side warp of the Switch main body
One end that the Current Transmit is connected to the controller FTU is crossed, the other end of the controller FTU passes through the voltage
Mutual inductor PT is connected to the mains side of the Switch main body, and the voltage transformer pt is used to provide work to the controller FTU
Make power supply and voltage signal, the controller FTU is used to control the delay separating brake and combined floodgate of the Switch main body.
Further, the voltage transformer pt is installed in the Switch main body at least side.
It is further, described that applying signal generation apparatus WS is internally provided with single-phase switch and for controlling the single-phase switch outside
Control unit.
Further, it is dynamic due to applying signal generation apparatus WS outside when the controller FTU is occurred by detecting earth fault
The current signal made and generated detects earth fault.
Further, it is described it is outer apply signal generation apparatus WS action used for the first time after, line-to-ground fault can be removed,
Being detected again in short time can act when earth fault occurs again.Compared with the existing technology, base described in the utility model
It is had the advantage that in the singlephase earth fault shielding system for applying signal outside：
(1) described in the utility model based on the singlephase earth fault shielding system for applying signal outside, need not additionally it increase
Residual voltage sensor or mutual inductor, are greatly saved production cost and social resources, effectively reduce rate of breakdown.
(2) described in the utility model based on the singlephase earth fault shielding system for applying signal outside, it is simple in structure, setting
Signal generation apparatus WS and block switch are applied outside, electric time-delay closing, decompression are carried out obtaining according to the unlike signal detected in circuit
It detects characteristic signal separating brake after separating brake, combined floodgate again in short-term and is latched, earth fault can be quickly detected, point occurs simultaneously certainly
Dynamic isolation, reliability are high.
The another object of the utility model is to propose a kind of based on the singlephase earth fault shielding system for applying signal outside
Partition method, to solve the problems, such as that phase-to-ground fault detection is inaccurate in small current neutral grounding system, cannot quickly isolate automatically.
In order to achieve the above objectives, the technical proposal of the invention is realized in this way：
A kind of partition method based on the singlephase earth fault shielding system for applying signal outside, including work as some on overhead transmission line
When singlephase earth fault occurs for track section, isolation step is as follows：
Step 1：When it is outer apply signal generation apparatus WS and detect earth fault after, it is described outer to apply in signal generation apparatus WS
The control unit in portion controls its corresponding single-phase switch action so that zero sequence characteristic signal sequence outer applied signal and filled described
It sets and is flowed on WS to the access constituted between fault point；
Step 2：Each controller FTU on the overhead transmission line can it is electric after, be delayed separating brake and combined floodgate successively, if
The second acknowledging time after the first acknowledging time and combined floodgate before block switch separating brake only detects a zero sequence characteristic signal sequence
Row, then continue to put into next block switch；If second after the first acknowledging time and combined floodgate before block switch separating brake
Acknowledging time detects zero sequence characteristic signal sequence twice, then load side of the singlephase earth fault in the block switch；
Step 3：If singlephase earth fault is simultaneously latched in the load side of the block switch, the block switch separating brake, under
Also separating brake is latched one block switch at once, to isolated fault.
Compared with the existing technology, it is described in the utility model based on the singlephase earth fault shielding system for applying signal outside every
It is had the advantage that from method：
(1) partition method described in the utility model based on the singlephase earth fault shielding system for applying signal outside, can
It finds that singlephase earth fault occurs point and is accurately isolated in time, while restoring non-faulting block supply.
(2) partition method described in the utility model based on the singlephase earth fault shielding system for applying signal outside, every
Residual voltage signal is not needed from block switch during singlephase earth fault, reduces equipment cost.
Description of the drawings
The attached drawing for constituting the part of the utility model is used to provide a further understanding of the present invention, this practicality is new
The illustrative embodiments and their description of type are not constituted improper limits to the present invention for explaining the utility model.
In attached drawing：
Fig. 1 is that the system based on the singlephase earth fault shielding system for applying signal outside described in the utility model embodiment is shown
It is intended to；
Fig. 2 is the work flow diagram one of the partition method described in the utility model embodiment；
Fig. 3 is the work flow diagram two of the partition method described in the utility model embodiment；
Fig. 4 is the work flow diagram three of the partition method described in the utility model embodiment；
Fig. 5 is the work flow diagram four of the partition method described in the utility model embodiment；
Fig. 6 is the work flow diagram five of the partition method described in the utility model embodiment；
Fig. 7 is the work flow diagram six of the partition method described in the utility model embodiment.
Specific implementation mode
It should be noted that in the absence of conflict, the feature in the embodiments of the present invention and embodiment can
To be combined with each other.
In the description of the present invention, it should be understood that term "center", " longitudinal direction ", " transverse direction ", "upper", "lower",
The orientation or positional relationship of the instructions such as "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside" is
It is based on the orientation or positional relationship shown in the drawings, is merely for convenience of describing the present invention and simplifying the description, rather than indicate
Or imply that signified device or element must have a particular orientation, with specific azimuth configuration and operation, therefore cannot understand
For limitations of the present invention.In addition, term " first ", " second " etc. are used for description purposes only, and should not be understood as indicating
Or it implies relative importance or implicitly indicates the quantity of indicated technical characteristic." first ", " second " etc. are defined as a result,
Feature can explicitly or implicitly include one or more this feature.It is in the description of the present invention, unless another
It is described, the meaning of " plurality " is two or more.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " is pacified
Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally
Connection；It can be mechanical connection, can also be electrical connection；Can be directly connected, can also indirectly connected through an intermediary,
It can be the connection inside two elements.For the ordinary skill in the art, on being understood by concrete condition
State the concrete meaning of term in the present invention.
The utility model will be described in detail below with reference to the accompanying drawings and embodiments.
It is a kind of based on the singlephase earth fault shielding system for applying signal outside, as shown in Figure 1, including applying signal generation apparatus outside
WS, several block switches and overhead circuit, between the overhead transmission line and substation be equipped with breaker CB, the breaker CB with
Electric line between first block switch FS1 is installed on the sub-line circuit of same section of busbar and described outer applies signal generation apparatus
WS, the outer signal generation apparatus WS that applies for generating zero sequence characteristic signal sequence, the beginning of the overhead transmission line to end according to
Secondary that several block switches are distributed with, the overhead transmission line is separated into different track sections by several block switches,
The shielding system need not additionally increase residual voltage sensor or mutual inductor, and production cost and social resources is greatly saved,
Effectively reduce equipment fault probability of happening；The block switch include Switch main body, controller FTU, Current Transmit and
The load side of voltage transformer pt, the Switch main body states one end that Current Transmit is connected to the controller FTU, described
The other end of controller FTU is connected to the mains side of the Switch main body, the mutual induction of voltage by the voltage transformer pt
Device PT is used to provide working power and voltage signal to the controller FTU, and the controller FTU is for controlling the switch originally
The delay separating brake and combined floodgate of body.
The voltage transformer pt is installed in the Switch main body at least side, and switch need not additionally increase residual voltage
Sensor or mutual inductor are saved production cost, while can be installed according to actual conditions, convenient, flexible, professional stronger；When
When Switch main body both sides are respectively mounted voltage sensor, physical circuit is：The load side of the Switch main body passes through the electric current
Mutual inductor CT is connected to one end of the controller FTU, and one end of the controller FTU is connected to by current transformer PTb
The other end of the load side of the Switch main body, the controller FTU is connected to the Switch main body by voltage transformer pt a
Mains side, the controller FTU is used to control the delay separating brake and combined floodgate of the Switch main body.
Signal generation apparatus WS, which is applied, outside described is internally provided with single-phase switch and the control list for controlling the single-phase switch
Member, intelligence degree higher, control are more accurate.
The controller FTU is when detecting earth fault and occurring due to generating by applying signal generation apparatus WS action outside
Current signal detects earth fault.
After applying signal generation apparatus WS first time action use outside described, line-to-ground fault can be removed, in a short time
Detecting again can act when earth fault occurs again.
A kind of partition method based on the singlephase earth fault shielding system for applying signal outside, including
When singlephase earth fault occurs for some track section on overhead transmission line, isolation step is as follows：
Step 1：When it is outer apply signal generation apparatus WS and detect earth fault after, it is described outer to apply in signal generation apparatus WS
The control unit in portion controls its corresponding single-phase switch action so that zero sequence characteristic signal sequence outer applied signal and filled described
It sets and is flowed on WS to the access constituted between fault point；
Step 2：Each controller FTU on the overhead transmission line can it is electric after, be delayed separating brake and combined floodgate successively, if
The second acknowledging time after the first acknowledging time and combined floodgate before block switch separating brake only detects a zero sequence characteristic signal sequence
Row, then continue to put into next block switch；If second after the first acknowledging time and combined floodgate before block switch separating brake
Acknowledging time detects zero sequence characteristic signal sequence twice, then load side of the singlephase earth fault in the block switch；
Step 3：If singlephase earth fault is simultaneously latched in the load side of the block switch, the block switch separating brake, under
Also separating brake is latched one block switch at once, to isolated fault.
As shown in Figures 2 to 7, it is assumed that earth fault F is happened between block switch FS2 and block switch FS3,
When it is outer apply signal generation apparatus WS and detect earth fault F after, apply the control list inside signal generation apparatus WS outside
Member control its corresponding single-phase switch action so that zero sequence characteristic signal sequence is in substation exit to being constituted between fault point
It is flowed on access；
After the controller FTU of block switch FS1 detects the zero sequence characteristic signal sequence, control block switch FS1 prolongs
When t0 carry out separating brake, at this time block switch FS2 and block switch FS3 due to decompression separating brake；
The tc that is delayed after block switch FS1 separating brakes closes a floodgate, and block switch FS2 is obtained electric at this time, and starts to obtain electric timing,
It closes a floodgate after delay t1, if closing onto failure, i.e., apply signal generation apparatus WS detects earth fault again in T time outside,
The outer control unit applied inside signal generation apparatus WS controls its corresponding single-phase switch action, and system is made to generate zero sequence spy again
Levy signal sequence；
Block switch FS2 after combined floodgate the ts times again in when detecting 2 characteristic sequences, it is believed that oneself closes and has arrived failure
On, control block switch FS2 separating brakes and be latched at once, block switch FS3 because detect one in short-term it is electric, also divide at once
Lock is latched, to isolated fault.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Within the spirit and principle of utility model, any modification, equivalent replacement, improvement and so on should be included in the utility model
Protection domain within.
Claims (4)
1. a kind of based on the singlephase earth fault shielding system for applying signal outside, it is characterised in that：Including applying signal generation apparatus outside
WS, several block switches and trolley wire road,
Breaker CB is equipped between the overhead transmission line and substation, between the breaker CB and first block switch FS1
Electric line or same section of busbar sub-line circuit on install it is described it is outer apply signal generation apparatus WS, it is described outer to apply signal and fill
It sets WS and has been sequentially distributed several segmentations for generating zero sequence characteristic signal sequence, the beginning of the overhead transmission line to end and has opened
It closes, the overhead transmission line is separated into different track sections by several block switches, and the block switch includes switching this
The load side of body, controller FTU, Current Transmit and voltage transformer pt, the Switch main body passes through the Current Mutual Inductance
Device CT is connected to one end of the controller FTU, and the other end of the controller FTU is connected to by the voltage transformer pt
The mains side of the Switch main body, the voltage transformer pt is used to provide working power to the controller FTU and voltage is believed
Number, the controller FTU is used to control the delay separating brake and combined floodgate of the Switch main body.
2. according to claim 1 a kind of based on the singlephase earth fault shielding system for applying signal outside, it is characterised in that：Institute
It states Switch main body at least side and the voltage transformer pt is installed.
3. according to claim 1 a kind of based on the singlephase earth fault shielding system for applying signal outside, it is characterised in that：Institute
It states and outer apply signal generation apparatus WS and be internally provided with single-phase switch and the control unit for controlling the single-phase switch.
4. according to claim 1 a kind of based on the singlephase earth fault shielding system for applying signal outside, it is characterised in that：Institute
State controller FTU when detecting earth fault and occurring due to the current signal that is generated by applying signal generation apparatus WS action outside come
Detect earth fault.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820518817.1U CN207994616U (en) | 2018-04-12 | 2018-04-12 | It is a kind of based on the singlephase earth fault shielding system for applying signal outside |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820518817.1U CN207994616U (en) | 2018-04-12 | 2018-04-12 | It is a kind of based on the singlephase earth fault shielding system for applying signal outside |
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| Publication Number | Publication Date |
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| CN207994616U true CN207994616U (en) | 2018-10-19 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108281945A (en) * | 2018-04-12 | 2018-07-13 | 天津浩源慧能科技有限公司 | It is a kind of based on the singlephase earth fault shielding system and partition method of applying signal outside |
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2018
- 2018-04-12 CN CN201820518817.1U patent/CN207994616U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108281945A (en) * | 2018-04-12 | 2018-07-13 | 天津浩源慧能科技有限公司 | It is a kind of based on the singlephase earth fault shielding system and partition method of applying signal outside |
| CN108281945B (en) * | 2018-04-12 | 2024-04-26 | 天津浩源汇能股份有限公司 | Single-phase grounding fault isolation system and isolation method based on externally applied signals |
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| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 301800 No. 5 Tiantong Road, economic development zone, Baodi District, Tianjin Patentee after: Tianjin Haoyuan Huineng Co.,Ltd. Address before: Room 110-18, Customs Building, Baodi Energy Conservation and Environmental Protection Industrial Zone, Tianjin 301800 Patentee before: TIANJIN HAOYUAN HUINENG TECHNOLOGY Co.,Ltd. |
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| CP03 | Change of name, title or address |