CN110518702A - Line feed terminals, feeder line control system and power network monitoring method - Google Patents
Line feed terminals, feeder line control system and power network monitoring method Download PDFInfo
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- CN110518702A CN110518702A CN201910848487.1A CN201910848487A CN110518702A CN 110518702 A CN110518702 A CN 110518702A CN 201910848487 A CN201910848487 A CN 201910848487A CN 110518702 A CN110518702 A CN 110518702A
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Abstract
The invention discloses a kind of line feed terminals, feeder line control system and power network monitoring methods, and wherein line feed terminals include: detection circuit, for the telemetry according to predetermined period detection power network monitoring point；Main control unit is connect with detection circuit, for judging whether telemetering current value reaches the first preset threshold；Communication module, it is connect with main control unit, telemetering current value for being up to the first preset threshold is sent to main website server, the second preset threshold is provided in main website server, when telemetering current value reaches the second preset threshold, feeder automation strategy is triggered, determines the target line feed terminals for being in fault zone edge, sends remote control command to target line feed terminals；Switching circuit is connect with main control unit, is used for control switch circuit.Original remote signalling correlation protection action type is changed to telemetering association type by the present invention, and the remote control of line feed terminals is realized by main website server, the production cost of line feed terminals is reduced without protective module.
Description
Technical field
The present invention relates to electric power network technique fields, and in particular to a kind of line feed terminals, feeder line control system and power network monitoring side
Method.
Background technique
Distribution automation is the automation that power distribution network scheduling controlling is realized using wire rod computer and the communication technology, and realization is matched
The operation monitoring of power grid and the automated system of control.Distribution automation system is generally by main website server, communication channel and feedback
Line terminal (Feeder Terminal Unit, referred to as FTU are referred to as panel switches monitor terminal) composition, FTU (are needed
Cooperate line switching use) main website server is sent for collected data by communication channel, main website server is passed through
Data processing, analysis, shows dispatcher by visualization interface.FTU is as the automatization terminal on distribution line, generally
Have three distant functions, i.e. remote signalling, telemetering, remote control.Remote signalling is 0 or 1 (with or without) signal, and telemetering is measuring signal, is generally had
Current Voltage power etc., remote control are that dispatcher can be by the division of the direct remote control switch of main website server.Concentrated feeder line
Automation is the advanced application based on distribution automation, and the fault condition for referring to that FTU is detected when occurring by failure is sent to master
Site server, main website server combines all fault messages and line condition to judge fault zone, quickly isolates fault zone, extensive
The power supply of multiple normal region.
Fig. 1 illustrates typical monocycle feeder, and a, b, c, d, e, f are intelligent switch (comprising FTU band motor-operating mechanism
Switch), wherein c be interconnection switch, be often in an off state.When the line failure between switch d, e, short circuit current
Switch e and switch f are flowed through, switch e sends the protection signal of short circuit current flow to main website, and switch f is gate out switch, and protection is dynamic
It trips, and sends protection signal to main website server；Switch d does not flow through short circuit current, but f switch trip, d switch lose
Electricity uploads the signal of exchange power loss to main website server.The protection act information that main website server is switched according to the e and f received,
The power loss signal of d judges fault point between d and e switch.Automatic remote control separates d and e switch, isolated fault region, and remote control is closed
Upper c and f switch restores the power supply of the normal region between ef between cd.
FTU in the prior art, needs to configure protective module to detect failure, when fault current flows through FTU, protective module
It detects the remote signals that electric current reaches protection act threshold value, causes an accident, main website server is sent to by communication channel.On
The main application for stating protective module is that the switch is automatically turned off after failure occurs, and realizes reclosing after disconnection in the short time.So
And in actual use, the switch of main website concentrated feeder automation demand does not need largely actively to trip, and protective module is only
Play the role of that signal is protected to generate, causes unnecessary production cost.Protection act definite value (the i.e. electric current of breakdown judge
Threshold value) it is inputted in terminal body, definite value change needs to go at live switch in actual use, and efficiency is lower.
Summary of the invention
After realizing that failure occurs in line feed terminals in the prior art due to increasing protective module
The function that the switch is automatically turned off leads to the problem of increasing unnecessary production cost, to provide a kind of line feed terminals, feeder line
Control system and power network monitoring method.
An aspect of of the present present invention provides a kind of line feed terminals, comprising: detection circuit, for being detected according to predetermined period
The telemetry of power network monitoring point, the telemetry include the telemetering current value of the power network monitoring point；Main control unit, with institute
Detection circuit connection is stated, for judging whether the telemetering current value reaches the first preset threshold, when the telemetering current value reaches
When to first preset threshold, communication module is controlled by the telemetering current value and is sent to main website server；The communication mould
Block is connect with the main control unit, and the telemetering current value for being up to first preset threshold is sent to the main website clothes
It is engaged in device, the second preset threshold is provided in the main website server, when the telemetering current value reaches second preset threshold
When, the second preset threshold is provided in the main website server, when the telemetering current value reaches second preset threshold,
Feeder automation strategy is triggered, determines the target line feed terminals for being in power supply trouble edges of regions, Xiang Suoshu target line feed terminals
Send remote control command, wherein when the line feed terminals are the target line feed terminals, the communication module thereon is also used to
Receive the remote control command that the main website server is sent, the remote control command is used to control the disconnected of the power network monitoring point and power grid
It opens or connects；Switching circuit is connect with main control unit, the electricity for being switched on or switched off between the power network monitoring point and power grid
Road, wherein the main control unit is also used to control the switching circuit according to the remote control command, to realize the power network monitoring
The on-off of point and power grid controls.
Optionally, the detection circuit includes: current transformer, for incuding the electric current letter by the power network monitoring point
Number；Conversion circuit is measured, is separately connected with the current transformer and the main control unit, for examining the current transformer
The current signal measured is converted to the telemetering current value of digital signal, and the telemetering current value of the digital signal is transmitted
To the main control unit.
Optionally, the current signal that the current transformer detects is three-phase current signal, and the main control unit is used for
Judge whether the telemetering current value of each phase reaches first preset threshold, when the telemetering current value of any one phase reaches described
When the first preset threshold, the communication module is controlled by the corresponding telemetering current value of the three-phase current signal and is sent to the master
Site server.
Optionally, the communication module includes: interface circuit, is connect with the main control unit；Wireless module connects with described
Mouth circuit connection；Antenna element is connect with the wireless module, for the main website server send radio signal or
Receive the radio signal that the main website server is sent.
Optionally, the interface circuit is arranged on interface board, and the main control unit is arranged on master control borad, the interface
Plate connects the master control borad by contact pin.
Optionally, the switching circuit includes: switch, for being switched on or switched off between the power network monitoring point and power grid
Circuit；Closing coil, for being closed the switch when being powered；Closing relay is connected on the access of the closing coil,
Its control terminal is connect with the main control unit, is powered or is powered off for controlling the closing coil；Opening coil, for logical
The switch is segmented when electric；Separating brake relay is connected on the access of the opening coil, control terminal and the main control unit
Connection is powered or powers off for controlling the opening coil.
Another aspect of the present invention provides a kind of feeder line control system, comprising: line feed terminals and main website server,
In, the line feed terminals are used to detect the telemetry of power network monitoring point, and the telemetry includes the power network monitoring point
Telemetering current value；And when the telemetering current value reaches first preset threshold, control communication module is electric by the telemetering
Flow valuve is sent to main website server；The second preset threshold is provided in the main website server, for working as the telemetering current value
When reaching second preset threshold, feeder automation strategy is triggered, determines the target feeder line for being in power supply trouble edges of regions
Terminal, Xiang Suoshu target line feed terminals send remote control command, and the remote control command is for controlling the power network monitoring point and power grid
It is open or closed.
Another aspect of the present invention provides a kind of power network monitoring method, comprising: detects power network monitoring according to predetermined period
The telemetry of point, the telemetry includes the telemetering current value of the power network monitoring point；Judging the telemetering current value is
It is no to reach the first preset threshold；When the telemetering current value reaches first preset threshold, control communication module will be described
Telemetering current value is sent to main website server, wherein when main website server judges that the telemetering current value reaches described second
When preset threshold, feeder automation strategy is triggered, determines the target line feed terminals for being in power supply trouble edges of regions, Xiang Suoshu mesh
It marks line feed terminals and sends remote control command；The remote control command that the main website server is sent is received, the remote control command is for controlling
The power network monitoring point and power grid it is open or closed；The switching circuit is controlled according to the remote control command, described in realizing
The control of the on-off of power network monitoring point and power grid.
Optionally, the telemetering current value is power grid three-phase current telemetry value；It is described whether to judge the telemetering current value
Reach the first preset threshold, comprising: judge whether the telemetering current value of each phase reaches first preset threshold；Wherein, when
When the telemetering current value of any one phase reaches first preset threshold, the communication module is controlled by the three-phase telemetering electric current
Value is sent to the main website server.
Optionally, further includes: receive program and fire order, described program fires order for being locally located described first
Preset threshold；Alternatively, receive the threshold modifying order of the main website server, the threshold modifying order is for modifying described the
One preset threshold；Based on local first preset threshold of threshold modifying order modification.
According to embodiments of the present invention, line feed terminals detect the telemetering of power network monitoring point by detection circuit according to predetermined period
Data, telemetry include the telemetering current value of power network monitoring point；It is pre- that main control unit judges whether telemetering current value reaches first
If threshold value, when telemetering current value reaches the first preset threshold, communication module is controlled by telemetering current value and is sent to main website service
Device；The telemetering current value that communication module is up to the first preset threshold is sent to main website server, is provided in main website server
Second preset threshold sends remote control command to line feed terminals, wherein communication when telemetering current value reaches the second preset threshold
Module is also used to receive the remote control command of main website server transmission, and remote control command is used to control the disconnection of power network monitoring point and power grid
Or it connects；Switching circuit is switched on or switched off the circuit between the power network monitoring point and power grid, wherein the main control unit is also used
In controlling the switching circuit according to the remote control command, to realize the on-off control of the power network monitoring point and power grid.It will be former
Some remote signalling correlation protection action types are changed to telemetering association type, and the remote control of line feed terminals is realized by main website server, with control
Line feed terminals execute corresponding fault insulation and resume power supply strategy, to reduce line feed terminals in concentrated feeder automation
Production cost.
Detailed description of the invention
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art be briefly described, it should be apparent that, it is described below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
It puts, is also possible to obtain other drawings based on these drawings.
Fig. 1 is the schematic diagram of monocycle feeder in the prior art；
Fig. 2 is the schematic diagram of line feed terminals and feeder line control system in the embodiment of the present invention；
Fig. 3 is a kind of schematic diagram of optional line feed terminals in the embodiment of the present invention；
Fig. 4 is the interface board of the embodiment of the present invention and the position of master control borad；
Fig. 5 is the flow chart of power network monitoring method in the embodiment of the present invention.
Specific embodiment
Technical solution of the present invention is clearly and completely described below in conjunction with attached drawing, it is clear that described implementation
Example is a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill
Personnel's every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
In order to enable those skilled in the art to better understand the solution of the present invention, below in conjunction in the embodiment of the present invention
Attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is only
The embodiment of a part of the invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill people
The model that the present invention protects all should belong in member's every other embodiment obtained without making creative work
It encloses.
It should be noted that description and claims of this specification and term " first " in above-mentioned attached drawing, "
Two " etc. be to be used to distinguish similar objects, without being used to describe a particular order or precedence order.It should be understood that using in this way
Term be interchangeable under appropriate circumstances, so as to the embodiment of the present invention described herein.In addition, term " includes " and " tool
Have " and their any deformation, it is intended that cover it is non-exclusive include, for example, containing a series of steps or units
Process, method, system, product or equipment those of are not necessarily limited to be clearly listed step or unit, but may include without clear
Other step or units listing to Chu or intrinsic for these process, methods, product or equipment.
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singular
Also it is intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, operation, device, component and/or their combination.
As long as in addition, the non-structure each other of technical characteristic involved in invention described below different embodiments
It can be combined with each other at conflict.
The embodiment of the invention provides a kind of line feed terminals 100, as shown in Fig. 2, the line feed terminals 100 include: detection electricity
Road 10, main control unit 20, communication module 30 and switching circuit 40.
Detection circuit 10 is used for the telemetry according to predetermined period detection power network monitoring point, and the telemetry includes institute
State the telemetering current value of power network monitoring point.Predetermined period can refer to sampling period, such as 5ms, basic to realize to power network monitoring
The real-time monitoring of point.Telemetry described in the embodiment of the present invention can also include the parameters such as voltage value or power.Different
Detection circuit used by telemetry is different.In the embodiment of the present invention, by taking telemetering current value as an example, the institute of the embodiment of the present invention
Stating detection circuit 10 includes: current transformer, for incuding the current signal by the power network monitoring point；Measurement conversion electricity
Road is separately connected with the current transformer and the main control unit, the electricity for detecting the current transformer
Stream signal is converted to the telemetering current value of digital signal, and the telemetering current value of the digital signal is transmitted to the master control list
Member.Telemetering electric current is passed to the Acquisition Circuit of main control unit, the correspondence be calculated by it by fast Fourier algorithm
Current effective value, used with doing subsequent judgement.The collection cost approach of the measurement conversion circuit of the embodiment of the present invention uses
MCP609 can use the integrated substitution of other models, or the circuit substitution of same function.
Main control unit 20 is connect with the detection circuit 10, for judging it is default whether the telemetering current value reaches first
Threshold value, when the telemetering current value reaches first preset threshold, which can refer to the threshold of current value
It is worth range, for example, (1 ± 15) % of normal current value.The telemetering current value is sent to main website clothes by control communication module 30
Business device 200.In the embodiment of the present invention, main control unit can be micro-control unit (MCU), such as model STM32F103VCT6
MCU, others MCU can also be used.First preset threshold described here is FTU threshold value, which is dynamic threshold, can
It is remotely located to be carried out by main website server, it can also be configured by way of local program burning, value is repaired
Change and changes.On the other hand, in the embodiment of the present invention, main website server side is additionally provided with protection definite value, when line feed terminals are fed back
Telemetering current value when reaching the protection definite value, send control command to line feed terminals, trigger feeder automation.
The communication module 30 is connect with the main control unit 20, for being up to the telemetering electricity of first preset threshold
Flow valuve is sent to the main website server 200, is provided with the second preset threshold in the main website server, when the telemetering electric current
When value reaches second preset threshold, feeder automation strategy is triggered, determines that the target in power supply trouble edges of regions is presented
Line terminal, Xiang Suoshu target line feed terminals send remote control command, wherein when the line feed terminals are the target line feed terminals
When, the communication module thereon is also used to receive the remote control command that the main website server 200 is sent, and the remote control command is used
In controlling the open or closed of the power network monitoring point and power grid.
Communication module described in the embodiment of the present invention can be wire communication module, such as ethernet module, can also be with
It is wireless communication module, such as GPRS module etc..It is communicated between main website server and main control unit by communication module realization, from
And realize the transmission of telemetry and remote control command.
Switching circuit 40 is connect with main control unit 20, for being switched on or switched off between the power network monitoring point and power grid
Circuit, wherein the main control unit 20 is also used to control the switching circuit 40 according to the remote control command, to realize the electricity
The on-off for netting monitoring point and power grid controls.In the embodiment of the present invention, in switching circuit can using relay as switch element,
It is also possible to wait switch elements substitution using silicon-controlled.
In the embodiment of the present invention, when telemetering current value reaches the second preset threshold, main website server generates trouble-signal,
Trigger feeder automation.The feeder automation of main website server side judges fault zone according to all trouble-signals, then to place
Target line feed terminals in power supply trouble edge send remote control command separation failure point switching circuit, and non-faulting region is closed in remote control
Power supply.
In the embodiment of the present invention, line feed terminals do not include protective module, and original remote signalling correlation protection action type is changed
For telemetering association type, the remote control of line feed terminals is realized by main website server, executes corresponding Fault Isolation to control line feed terminals
With the strategy that restores electricity, to reduce the production cost of line feed terminals in concentrated feeder automation.
Having is usually three-phase electricity in power grid, therefore, the electric current letter that current transformer described in the embodiment of the present invention detects
It number is three-phase current signal, the main control unit is for judging whether the telemetering current value of each phase reaches the described first default threshold
Value, when the telemetering current value of any one phase reaches first preset threshold, controls the communication module for the three-phase electricity
The corresponding telemetering current value of stream signal is sent to the main website server.
As shown in figure 3, Ia, Ib, Ic the line current stream incuded from switch CT current transformer (not shown) secondary side
Enter after measuring conversion circuit, be sent into the sample circuit of main control unit, obtaining three-phase current by fast fourier algorithm by it has
Valid value is used as subsequent judgement.Main control unit real-time monitoring three-phase electricity flow valuve variation, wherein any one phase reaches the first default threshold
When value, three phase change telemetry value of real-time transmission to main website server.The data for being sent to main website server can be floating type number
According to, it is also possible to normalized value or upscaled value substitution.
As an alternative embodiment, the communication module includes: interface circuit, it is connect with the main control unit；
Wireless module is connect with the interface circuit；Antenna element is connect with the wireless module, is used for the main website server
It sends radio signal or receives the radio signal that the main website server is sent.Interface circuit can be RS232 interface
Circuit, wireless module can be GPRS module, gsm module etc..As shown in figure 3, main control unit by RS232 interface circuit with
Then the connection of GPSR module is realized by antenna element and main website server and is wirelessly communicated.RS232 interface circuit is responsible for feeder line end
Bi-directional transfer of data between end and main website server, full-duplex communication, main control unit only receive the remote control life of main website server
It enables.
Optionally, in the embodiment of the present invention, main website server can also be by way of to remote control to line feed terminals, mainly
It is that the first preset threshold of main control unit is modified, that is to say, that the first preset threshold is set in main website server, so
The change that line feed terminals carry out threshold value is controlled by way of remote control command afterwards.Wherein, main website server side is additionally provided with protection
Definite value sends control command, triggering feedback to line feed terminals when the telemetering current value of line feed terminals feedback reaches the protection definite value
Line automation.
As a kind of optional embodiment of the embodiment of the present invention, the switching circuit includes: switch, for connecing on-off
Open the circuit between the power network monitoring point and power grid；Closing coil, for being closed the switch when being powered；Combined floodgate relay
Device is connected on the access of the closing coil, and control terminal is connect with the main control unit, for controlling the closing coil
It is powered or powers off；Opening coil, for being segmented the switch when being powered；Separating brake relay is connected to the opening coil
Access on, control terminal is connect with the main control unit, is powered or power-off for controlling the opening coil.
In the embodiment of the present invention, when needing to disconnect the connection of power grid, main control unit closure point is controlled by remote control command
Lock relay, so that opening coil is powered, switch is disconnected；When needing to connect the connection of power grid, pass through remote control command control
Main control unit processed is closed closing relay, so that closing coil is powered, closes the switch.As shown in figure 3,1 output control of control is closed
Lock relay, and then control closing coil and be powered, closure switch；2 output control separating brake relay of control, and then control separating brake line
Circle is powered, section breaker.
In the embodiment of the present invention, the interface circuit is arranged on interface board, and the main control unit is arranged on master control borad,
The interface board connects the master control borad by contact pin.As shown in figure 4, serial ports base is welded in interface board, interface board is by inserting
Needle connects master control borad.RS232 interface circuit is located on interface board, and serial ports base, interface board, master control borad are individually fixed in panel.
Serial ports base and/or interface board and/or master control borad are fixed on bottom plate or side plate.
In the embodiment of the present invention, line feed terminals can also include display screen, for showing corresponding data, for staff
Carry out data modification.In order to further decrease production cost, the line feed terminals of the embodiment of the present invention can not include display screen, and
Necessary display is done by indicator light, it is not necessary that the first preset threshold is arranged on the spot, repairing for threshold value is directly carried out by main website server
Change.
The embodiment of the invention also provides a kind of feeder line control systems, comprising: feeder line provided by the embodiment of the present invention is whole
End and main website server, wherein the line feed terminals are used to detect the telemetry of power network monitoring point, and the telemetry includes
The telemetering current value of the power network monitoring point；And when the telemetering current value reaches first preset threshold, control communication
The telemetering current value is sent to main website server by module；The main website server is distant for sending to the line feed terminals
Control order, the remote control command are used to control the open or closed of the power network monitoring point and power grid.
Wherein, about the specific descriptions of line feed terminals referring to above method embodiment, which is not described herein again.
For being provided with the second preset threshold in main website server, it is mainly used for reaching described the when the telemetering current value
When two preset thresholds, feeder automation strategy is triggered, determines the target line feed terminals for being in power supply trouble edges of regions, Xiang Suoshu
Target line feed terminals send remote control command, to realize suspension and connect the control of net, without protection is arranged in line feed terminals
Module, and remote control is carried out by main website server.Optionally, main website server can be also used for first in line feed terminals
Preset threshold is configured and modifies, and batch setting and the modification of multiple line feed terminals may be implemented, arrive without staff
Line feed terminals scene is configured and modifies in turn, improves the working efficiency of staff.
The embodiment of the invention also provides a kind of power network monitoring method, this method can be as the feedback described in the embodiment of the present invention
Line terminal executes.As described in Figure 5, this method comprises:
Step S501, according to the telemetry of predetermined period detection power network monitoring point, the telemetry includes the electricity
Net the telemetering current value of monitoring point.
Step S502, judges whether the telemetering current value reaches the first preset threshold.
Step S503, when the telemetering current value reaches first preset threshold, control communication module will be described distant
It surveys current value and is sent to main website server, wherein when main website server judges that the telemetering current value reaches described second in advance
If when threshold value, triggering feeder automation strategy, the target line feed terminals for being in power supply trouble edges of regions, Xiang Suoshu target are determined
Line feed terminals send remote control command.When not up to the first preset threshold, then can not have to think that main website server sends data.
Step S504 receives the remote control command that the main website server is sent, and the remote control command is for controlling the electricity
Net the open or closed of monitoring point and power grid.
Step S505 controls the switching circuit according to the remote control command, to realize the power network monitoring point and power grid
On-off control.
In the embodiment of the present invention, original remote signalling correlation protection action type is changed to telemetering association type, by main website service
Device realizes the remote control of line feed terminals, executes corresponding fault insulation and resume power supply strategy to control line feed terminals, without
Protective module, to reduce the production cost of line feed terminals in concentrated feeder automation.
As a kind of optional embodiment, telemetering current value described in the embodiment of the present invention is the telemetering of power grid three-phase current
Value；It is described to judge whether the telemetering current value reaches the first preset threshold, comprising: judge each phase telemetering current value whether
Reach first preset threshold；Wherein, when the telemetering current value of any one phase reaches first preset threshold, institute is controlled
It states communication module and the three-phase telemetering current value is sent to the main website server.Line feed terminals real-time monitoring three-phase electricity flow valuve
Variation, wherein when any one phase reaches the first preset threshold, three phase change telemetry value of real-time transmission to main website server.It is sent to
The data of main website server can be real-coded GA, it is also possible to normalized value or upscaled value substitution.
As a kind of optional embodiment, power network monitoring method in the embodiment of the present invention further include: receive program and fire life
It enables, described program fires order for first preset threshold is locally located；Alternatively, receiving the threshold of the main website server
Value modification order, the threshold modifying order is for modifying first preset threshold；It is modified based on the threshold modifying order
Local first preset threshold.
Main website server can be used for that the first preset threshold in line feed terminals is configured and is modified, and may be implemented more
The batch setting of a line feed terminals and modification are configured and modify in turn without staff to line feed terminals scene, mention
The high working efficiency of staff.
Obviously, the above embodiments are merely examples for clarifying the description, and does not limit the embodiments.It is right
For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of variation or
It changes.There is no necessity and possibility to exhaust all the enbodiments.And it is extended from this it is obvious variation or
It changes among still in the protection scope of the application.
Claims (10)
1. a kind of line feed terminals characterized by comprising
Detection circuit, for the telemetry according to predetermined period detection power network monitoring point, the telemetry includes the electricity
Net the telemetering current value of monitoring point；
Main control unit is connect with the detection circuit, for judging whether the telemetering current value reaches the first preset threshold, when
When the telemetering current value reaches first preset threshold, the telemetering current value is sent to main website clothes by control communication module
Business device；
The communication module is connect with the main control unit, and the telemetering current value for being up to first preset threshold is sent out
It send to the main website server, the second preset threshold is provided in the main website server, when the telemetering current value reaches institute
When stating the second preset threshold, feeder automation strategy is triggered, determines the target line feed terminals for being in power supply trouble edges of regions, to
The target line feed terminals send remote control command, wherein when the line feed terminals are the target line feed terminals, institute thereon
It states communication module and is also used to receive the remote control command that the main website server is sent, the remote control command is described for controlling
Power network monitoring point and power grid it is open or closed；
Switching circuit is connect with main control unit, the circuit for being switched on or switched off between the power network monitoring point and power grid,
In, the main control unit is also used to control the switching circuit according to the remote control command, with realize the power network monitoring point with
The on-off of power grid controls.
2. line feed terminals according to claim 1, which is characterized in that the detection circuit includes:
Current transformer, for incuding the current signal by the power network monitoring point；
Conversion circuit is measured, is separately connected with the current transformer and the main control unit, is used for the current transformer
The current signal detected is converted to the telemetering current value of digital signal, and the telemetering current value of the digital signal is passed
Transport to the main control unit.
3. line feed terminals according to claim 2, which is characterized in that the current signal that the current transformer detects is
Three-phase current signal, the main control unit for judging whether the telemetering current value of each phase reaches first preset threshold,
When the telemetering current value of any one phase reaches first preset threshold, controls the communication module and believe the three-phase current
Number corresponding telemetering current value is sent to the main website server.
4. line feed terminals according to claim 1, which is characterized in that the communication module includes:
Interface circuit is connect with the main control unit；
Wireless module is connect with the interface circuit；
Antenna element is connect with the wireless module, for sending radio signal to the main website server or receiving institute
State the radio signal of main website server transmission.
5. line feed terminals according to claim 4, which is characterized in that the interface circuit is arranged on interface board, described
Main control unit is arranged on master control borad, and the interface board connects the master control borad by contact pin.
6. line feed terminals according to claim 1, which is characterized in that the switching circuit includes:
Switch, the circuit for being switched on or switched off between the power network monitoring point and power grid；
Closing coil, for being closed the switch when being powered；
Closing relay is connected on the access of the closing coil, and control terminal is connect with the main control unit, for controlling
The closing coil is powered or power-off；
Opening coil, for being segmented the switch when being powered；
Separating brake relay is connected on the access of the opening coil, and control terminal is connect with the main control unit, for controlling
The opening coil is powered or power-off.
7. a kind of feeder line control system characterized by comprising line feed terminals as claimed in any one of claims 1 to 6 and main website
Server,
Wherein, the line feed terminals are used to detect the telemetry of power network monitoring point, and the telemetry includes the power grid prison
The telemetering current value of measuring point；And when the telemetering current value reaches first preset threshold, control communication module will be described
Telemetering current value is sent to main website server；
The second preset threshold is provided in the main website server, for reaching the described second default threshold when the telemetering current value
When value, feeder automation strategy is triggered, determines the target line feed terminals for being in power supply trouble edges of regions, Xiang Suoshu target feeder line
Terminal sends remote control command, and the remote control command is used to control the open or closed of the power network monitoring point and power grid.
8. a kind of power network monitoring method characterized by comprising
According to the telemetry of predetermined period detection power network monitoring point, the telemetry includes the telemetering of the power network monitoring point
Current value；
Judge whether the telemetering current value reaches the first preset threshold；
When the telemetering current value reaches first preset threshold, the telemetering current value is sent to by control communication module
Main website server, wherein when main website server judges that the telemetering current value reaches second preset threshold, triggering feedback
Line automation strategy determines that the target line feed terminals for being in power supply trouble edges of regions, Xiang Suoshu target line feed terminals send distant
Control order；
The remote control command that the main website server is sent is received, the remote control command is for controlling the power network monitoring point and power grid
It is open or closed；
The switching circuit is controlled according to the remote control command, to realize the on-off control of the power network monitoring point and power grid.
9. power network monitoring method according to claim 8, which is characterized in that the telemetering current value is power grid three-phase current
Telemetry value；It is described to judge whether the telemetering current value reaches the first preset threshold, comprising:
Judge whether the telemetering current value of each phase reaches first preset threshold；
Wherein, when the telemetering current value of any one phase reaches first preset threshold, controlling the communication module will be described
Three-phase telemetering current value is sent to the main website server.
10. power network monitoring method according to claim 8, which is characterized in that further include:
It receives program and fires order, described program fires order for first preset threshold is locally located；Alternatively,
The threshold modifying order of the main website server is received, the threshold modifying order is for modifying the described first default threshold
Value；Based on local first preset threshold of threshold modifying order modification.
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