CN110401176A - Zero line disconnection protection device and control method thereof - Google Patents
Zero line disconnection protection device and control method thereof Download PDFInfo
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- CN110401176A CN110401176A CN201910553070.2A CN201910553070A CN110401176A CN 110401176 A CN110401176 A CN 110401176A CN 201910553070 A CN201910553070 A CN 201910553070A CN 110401176 A CN110401176 A CN 110401176A
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- 238000004891 communication Methods 0.000 claims abstract description 64
- 238000012360 testing method Methods 0.000 claims description 49
- 238000007493 shaping process Methods 0.000 claims description 21
- 230000005540 biological transmission Effects 0.000 claims description 19
- 238000001914 filtration Methods 0.000 claims description 17
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- 230000005611 electricity Effects 0.000 description 10
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/261—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations
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Abstract
The application relates to a zero line disconnection protection device and a control method thereof. The zero line disconnection protection device is used for zero line disconnection protection of the power distribution network. The zero line disconnection protection device comprises a plurality of node control devices. The node control device comprises a circuit breaker, a controller and a communication device. And the circuit breaker is used for controlling the on-off of the three live wires. The controller is electrically connected with the circuit breaker and used for controlling the switching-on and the tripping of the circuit breaker and receiving and transmitting signals. The communication device is electrically connected with the controller, is used for receiving and modulating the signal sent by the controller and sending the signal to the zero line, and is also used for receiving the signal loaded on the zero line and transmitting the signal to the controller after demodulation. The zero line disconnection protection device does not need to measure voltage or current and can judge the zero line disconnection condition without setting a trip point. The zero line breakage protection device can detect the breakage condition of the long-distance zero line in a segmented mode, can judge the position of the zero line with broken circuit, and can improve the accuracy of the zero line breakage protection device.
Description
Technical field
This application involves distribution safety technique for using electricity fields, more particularly to a kind of zero line break protection device and its control
Method.
Background technique
Most the used TN-C system of China's power distribution network low voltage power transmission at present, i.e. three-phase and four-line power transmission network.Three-phase and four-line
Power transmission network processed adds the Transmission Mode of zero curve N using A, B, C three-phase electricity.When zero curve N is disconnected, due to bearing for A, B, C three-phase electricity
It carries and there is imbalance, will cause subscriber endpoints voltage and be raised and lowered.And overtension or the too low consumer electronics that will lead to are burnt
Or it can not work normally.
To factory or civil small-scale equipment, i.e. neutral line break protection is set neutral line break protection equipment spininess in traditional technology
It is standby to be chiefly used in monitoring personal route.Since occasionally there are larger fluctuations for the voltage of public network route, therefore voltage is used in traditional technology
The method that electric current is monitored is easy to cause neutral line break protection equipment to generate malfunction.In addition, neutral line break protection equipment is set
The trip-point set is too high or too low all to cause its own can not accurate work.
Summary of the invention
Based on this, it is necessary to aiming at the problem that neutral line break protection equipment in traditional technology is easy to produce malfunction, mention
For a kind of zero line break protection device and its control method.
A kind of zero line break protection device, the neutral line break for power distribution network are protected, and the power distribution network is three-phase four-wire system,
Including three firewires and a zero curve, comprising:
Multiple node control devices, the node control device include:
Breaker, for controlling the on-off of three firewires；
Controller is connect with the circuit breaker electric, for controlling combined floodgate and the tripping of the breaker, and receiving and transmitting signal；
And
Communication device is electrically connected with the controller, for receiving and modulating the signal and transmission that the controller is sent
To zero curve, it is also used to receive the signal loaded on the zero curve, the controller is transmitted to after demodulation.
The communication device includes: in one of the embodiments,
Transmitting line is electrically connected with the controller, the signal sent for receiving the controller, and will be received
Signal modulation be high-frequency carrier signal after be transmitted on the zero curve；And
Circuit is received, is electrically connected with the controller, for receiving the signal loaded on the zero curve, is transmitted to after demodulation
The controller.
The breaker includes: in one of the embodiments,
Contact of breaker, for controlling the on-off of three firewires；
Operating mechanism is mechanically connected, for controlling the divide-shut brake of the contact of breaker with the contact of breaker；And
Control coil is electrically connected with the controller and the operating mechanism respectively, and the controller controls the control
After coil is powered, the divide-shut brake of the contact of breaker is controlled via the operating mechanism.
The breaker further includes combined floodgate handle in one of the embodiments, is mechanically connected, is used for the operating mechanism
Manually control the divide-shut brake of the contact of breaker.
The controller includes: in one of the embodiments,
Filtering shaping circuit is electrically connected with the communication device, and the signal for sending to the communication device is filtered
Wave shaping；
Governor circuit is electrically connected with the filtering shaping circuit, the signal sent for receiving the filtering shaping circuit
And it is handled；
Driving circuit is electrically connected with the governor circuit, the control signal sent for receiving the governor circuit；And
Relay is electrically connected with the driving circuit, the driving signal sent for receiving the driving circuit, and foundation
The driving signal is acted.
A kind of zero line break protection device control method, comprising:
S10, the node control device send test signal to the zero curve；
S20, whether node control device described in next stage is according to receiving the test signal and execute whether send feedback
Signal is to the zero curve；
S30, the node control device according to whether the feedback signal is received, judge the node control device with
The logical open circuit conditions of the zero curve between node control device described in next stage；
S40, when open circuit occurs for the zero curve, the node control device controls three firewires and disconnects.
In one of the embodiments, in the S10, the controller sends electric signal to the communication device, institute
State communication device and the electric signal that the controller is sent be modulated to high-frequency carrier signal, and using the high-frequency carrier signal as
The test signal is sent on the zero curve.
In one of the embodiments, in the S30, if the node control device receives institute within a preset time
State feedback signal, then the zero curve between node control device described in the node control device and next stage is access, otherwise for
Open circuit.
The S30 includes: in one of the embodiments,
If the node control device receives the feedback signal within a preset time, the node control device with
Zero curve between node control device described in next stage is access；
If the node control device is not received by the feedback signal, the node control dress within a preset time
It sets and repeats to send on the test signal to the zero curve；
The node control device repeats to send the test signal and judge whether to receive in the preset time
After the feedback signal reaches preset times, if the node control device is not received by the feedback signal, the section
Zero curve between node control device described in point control device and next stage is open circuit.
In one of the embodiments, in the S30, if the communication device received from the zero curve it is described anti-
Feedback signal, the communication device are sent to the controller after demodulating the feedback signal, the controller receives described
Signal after communication device demodulation, then the zero curve between node control device described in the node control device and next stage is logical
Road.
The S20 includes: in one of the embodiments,
Node control device described in next stage judges whether to receive the test signal；
If node control device described in next stage receives the test signal, the hair of node control device described in next stage
Send the feedback signal to the zero curve；
If node control device described in next stage is not received by the test signal, the dress of node control described in next stage
Set attonity.
In one of the embodiments, in the S40, the node control device passes through described in controller control
Breaker disconnects three firewires.
Each of the above-mentioned zero line break protection device node control device is filled by the controller and the communication
It sets and sends the test signal, and by judging whether to receive the feedback signal, node described in available and next stage
The open circuit conditions of the zero curve between control device.The node control device is not necessarily to set without measuring voltage or electric current
Setting trip-point can be realized judgement to the zero line break situation.The zero line break protection device is multiple described by being arranged
Node control device may be implemented to carry out the broken string situation of the zero curve of long range segmentation detection, and can be according to the section
The position of the zero curve of open circuit occurs for the position accurate judgement of point control device, and the zero line break protection device can be improved
Accuracy rate.
Detailed description of the invention
Fig. 1 is a kind of zero line break protection device topological diagram provided by the embodiments of the present application；
Fig. 2 is a kind of zero line break protection device connection relationship diagram provided by the embodiments of the present application；
Fig. 3 is a kind of communication device transmitting line topological diagram provided by the embodiments of the present application；
Fig. 4 is that a kind of communication device provided by the embodiments of the present application receives circuit topology figure；
Fig. 5 is a kind of zero line break protection device control method flow chart provided by the embodiments of the present application.
Drawing reference numeral explanation
100 zero line break protection devices
10 node control devices
110 breakers
111 contact of breaker
112 operating mechanisms
113 control coils
114 combined floodgate handles
120 controllers
121 filtering shaping circuits
122 governor circuits
123 driving circuits
124 relays
130 communication devices
131 transmitting lines
132 receive circuit
Specific embodiment
In order to make the above objects, features, and advantages of the present application more apparent, with reference to the accompanying drawing to the application
Specific embodiment be described in detail.Many details are explained in the following description in order to fully understand this Shen
Please.But the application can be implemented with being much different from other way described herein, those skilled in the art can be not
Similar improvement is done in the case where violating the application intension, therefore the application is not limited by following public specific implementation.
It should be noted that it can directly on the other element when element is referred to as " being fixed on " another element
Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it, which can be, is directly connected to
To another element or it may be simultaneously present centering elements.
Unless otherwise defined, all technical and scientific terms used herein and the technical field for belonging to the application
The normally understood meaning of technical staff is identical.The term used in the description of the present application is intended merely to description tool herein
The purpose of the embodiment of body, it is not intended that in limitation the application.Term " and or " used herein includes one or more phases
Any and all combinations of the listed item of pass.
Referring to Figure 1, the application provides a kind of zero line break protection device 100.The zero line break protection device 100 is used
It is protected in the neutral line break of power distribution network, the power distribution network is three-phase four-wire system, including three firewires and a zero curve.The zero curve
Broken wire protecting equipment 100 includes multiple node control devices 10.The node control device 10 includes breaker 110, controller
120 and communication device 130.The breaker 110 is used to control the on-off of three firewires.The controller 120 with it is described
Breaker 110 is electrically connected.The controller 120 is used to control combined floodgate and the tripping of the breaker 110, and receiving and transmitting signal.Institute
Communication device 130 is stated to be electrically connected with the controller 120.The communication device 130 is for receiving and modulating the controller 120
The signal of transmission is simultaneously sent to zero curve, is also used to receive the signal loaded on the zero curve, the controller is transmitted to after demodulation
120。
The zero line break protection device 100 includes multiple node control devices 10.N number of node control device
10 can correspond to and be installed on N number of node of power distribution network, and monitor the N-1 section zero curve between N number of node.That is every section of zero curve can be with
It is monitored by two node control devices 10.By the way that multiple node control devices 10 are arranged, the zero curve is disconnected
The specific location that line protective device 100 can be disconnected with zero curve described in accurate judgement, to reduce the scope of repair, it is ensured that power distribution network
The damage of user terminal electrical equipment will not be caused because voltage is raised and lowered after the neutral line break, reduce supply and demand electricity both sides'
Loss.
The breaker 110 is installed on the node of distribution network line, can control the logical of the three-phase electricity of the power distribution network
It is disconnected.In one embodiment, the breaker 110 includes three input terminals, three output ends, two control terminals.Described three
Input terminal is respectively connected to A, B, C three-phase electricity inlet wire of power distribution network, and three output ends are respectively connected to A, B, C three-phase electricity outlet,
Described two control terminals are connect with the controller 120 by conducting wire.When the zero curve is channel status, the breaker
110 be channel status.When the node control device 10 monitors the zero curve generation open circuit of power distribution network, the controller
The 120 control breakers 110 trip.I.e. by the three-phase electricity of cutting power distribution network, prevent from generating damage to user terminal electrical equipment
Evil.
The controller 120 is the control centre of the zero line break protection device 100, can be used for signal and sends, believes
It number receives and data processing etc..In one embodiment, the feedback signal can whether be received according to the controller 120
Judge the break-make situation of the zero curve.In another embodiment, can also be sentenced by the circuit in the communication device 130
It is disconnected whether to receive the feedback signal.For example, the communication device 130 does not receive the feedback letter within a preset time
Number, the communication device 130 can send trip signal to the controller 120.As long as being appreciated that the method that uses can be with
It realizes to whether receiving the feedback signal and judge.
The controller 120 can pass through two paths of data line receiving and transmitting signal, i.e., the described controller with the communication device 130
120 transmitting terminal is connect by conducting wire with the receiving end of the communication device 130, the receiving end of the controller 120 with it is described
The transmitting terminal of communication device 130 connects.The setting of the two paths of data line, can be improved the efficiency of transmission of data, to improve
The working efficiency of the zero line break protection device 100.In addition, the communication device 130 may include two communication lines, point
It is not electrically connected with the zero curve with geodesic, i.e., the described communication device 130, the zero curve and geodesic constitute signal of communication and return
Road.It is appreciated that the communication device 130 of each node control device 10 can receive and send signal, and believe
Number send and receive and can be completed according to communication protocol.
The working principle of the zero line break protection device 100 are as follows: nearest apart from power distribution network Circuit Fault on Secondary Transformer output end
The node control device 10 can be first order node control device, second level node control device and the first order section
Point control device is adjacent.Firstly, the controller 120 can be spaced preset time in the first order node control device
Test signal is exported to the communication device 130.The test signal modulation can be high frequency carrier by the communication device 130
Signal, and be transmitted on the zero curve of power distribution network.Secondly, the communication device 130 connects in the node control device of the second level
The test signal is received, and the controller 120 will be sent to after test signal demodulation.The controller 120 receives
After the test signal, feedback signal is sent to the communication device 130.The communication device 130 is by the feedback signal tune
It is transmitted to after system on the zero curve of power distribution network.Again, in first order node control device, the communication device 130 is received
The feedback signal, and the controller 120 will be sent to after feedback signal demodulation.The controller 120 can foundation
Whether receive the feedback signal and judges whether is zero curve between first order node control device and second node control device
For access.Similarly, the logical of the zero curve between the first order node control device and the second level node control device is completed
After open circuit judgement, the second level node control device and the adjacent third level node control device along three-phase electricity outbound course
Between the deterministic process of zero curve on-off be same as above.It is appreciated that the zero curve between node control device 10 described in every two
Successively sequence carries out for judgement, if some deterministic process finds that open circuit occurs for the zero curve, no longer needs to the feelings for judging subsequent zero curve
Condition.
It is appreciated that the communication device 130 of the second level node control device is received by the first order node
Control device is loaded onto the test signal on the zero curve.The communication device of the first order node control device
130, which receive the second level node control device, is loaded onto the feedback signal on the zero curve.I.e. described being transmitted across in signal
Cheng Zhong, the test signal and the feedback signal all have directive property.Each node control device 10 sends and receives
Signal in may each comprise address information.
In conclusion each of described zero line break protection device 100 node control device 10 passes through the control
Device 120 and the communication device 130 send the test signal, and by judging whether to receive the feedback signal, can be with
Obtain the open circuit conditions of the zero curve between next stage node control device 10.The node control device 10 is without measurement
Voltage or electric current, and no setting is required that the judgement to the zero line break situation can be realized in trip-point.The neutral line break protection
Device 100 may be implemented to carry out the broken string situation of the zero curve of long range by the way that multiple node control devices 10 are arranged
Segmentation detection, and the position of the zero curve of open circuit can occur according to the position accurate judgement of the node control device 10,
The accuracy rate of the zero line break protection device 100 can be improved.
Please also refer to Fig. 2, in one embodiment, the communication device 130 includes transmitting line 131 and reception circuit
132.The transmitting line 131 is electrically connected with the controller 120.The transmitting line 131 is for receiving the controller 120
The signal of transmission, and by the signal modulation received be high-frequency carrier signal after be transmitted on the zero curve.The reception circuit
132 are electrically connected with the controller 120.The reception circuit 132 passes after demodulation for receiving the signal loaded on the zero curve
Transport to the controller 120.It is appreciated that the transmitting line 131 can be by the test signal of transmission or the feedback
Signal modulation is the high-frequency carrier signal, and the high-frequency carrier signal is loaded onto the zero curve.The zero curve can be made
The conducting wire of signal is transmitted between the two neighboring node control device 10.The circuit 132 of receiving can will receive
The test signal or the feedback signal are equally modulated to the high-frequency carrier signal, and the high-frequency carrier signal is loaded
To the zero curve.In one embodiment, the transmitting line 131 and the reception circuit 132 are respectively referring to Fig. 3 and Fig. 4.
In one embodiment, the breaker 110 includes contact of breaker 111, operating mechanism 112 and control coil
113.The contact of breaker 111 is used to control the on-off of three firewires.The operating mechanism 112 is touched with the breaker
First 111 mechanical connection.The operating mechanism 112 is used to control the divide-shut brake of the contact of breaker 111.The control coil
113 are electrically connected with the controller 120 and the operating mechanism 112 respectively.The controller 120 controls the control coil
After 113 are powered, the divide-shut brake of the contact of breaker 111 is controlled via the operating mechanism 112.It is appreciated that the open circuit
Device contact 111 is used to control the on-off of three firewires described in power distribution network.The operating mechanism 112 can make the contact of breaker
111 realize contact and are detached from.In one embodiment, the control coil 113 includes both close and trip coils.The control
Device 120 processed can control the on-off of the closing coil and the breaking coil respectively by two-way control line, so that described disconnected
Road device contact 111 opens or closes.Described two control terminals of the controller 120 can prevent the mutual dry of control process
It disturbs, improves the high efficiency and accuracy of control.
In one embodiment, the breaker 110 further includes combined floodgate handle 114, mechanical even with the operating mechanism 112
It connects, for manually controlling the divide-shut brake of the contact of breaker 111.The combined floodgate handle 114 can lead in route after maintenance
Crossing staff and stirring is closed the breaker 110.Can also breaking down or occur in the controller 120, other are urgent
When situation, the breaker 110 is artificially disconnected.The setting of the combined floodgate handle 114 can be further improved the safety of the zero curve
Property.
In one embodiment, the controller 120 includes filtering shaping circuit 121, governor circuit 122, driving circuit
123 and relay 124.The filtering shaping circuit 121 is electrically connected with the communication device 130.The filtering shaping circuit 121
Signal for sending to the communication device 130 is filtered shaping.The governor circuit 122 and the filtering shaping circuit
121 electrical connections.The governor circuit 122 is used to receive the signal that the filtering shaping circuit 121 is sent and is handled.It is described
Driving circuit 123 is electrically connected with the governor circuit 122.The driving circuit 123 is sent for receiving the governor circuit 122
Control signal.The relay 124 is electrically connected with the driving circuit 123.The relay 124 is for receiving the driving
The driving signal that circuit 123 is sent, and acted according to the driving signal.
It is appreciated that the filtering shaping circuit 121 can to the communication device 130 send signal be filtered it is whole
Shape improves the signal-to-noise ratio for inputting the feedback signal of the governor circuit 122.When exporting the test signal, the master
The electric signal that control circuit 122 is sent can first pass around the filtering shaping circuit 121.The governor circuit 122 can be micro-
Control unit (Microcontroller Unit, MCU).In one embodiment, the governor circuit 122 can also include putting
Big circuit, the amplifying circuit can be electrically connected with the filtering shaping circuit 121, the amplifying circuit, the filter shape
The electric connection mode of circuit 121 and the governor circuit 122 is not construed as limiting, and can be determined according to actual conditions.The filter
The signal quality for being transmitted to the zero curve can be improved in the setting of wave shaping circuit 121 and the amplifying circuit, to extend letter
Number transmission range, and improve the accuracy that the zero line break protection device 100 detects open circuit conditions.The driving circuit
123 and the relay 124 for controlling the breaker 110.The governor circuit 122 sends control signal to the driving
Circuit 123.The driving circuit 123 sends driving signal to the relay 124, passes through the on-off control of the relay 124
The control coil 113 made in the breaker 110 is powered, to control the state of the breaker 110.
Please also refer to Fig. 5, a kind of zero line break protection device control method, comprising: S10, the node control device
10 send test signal to the zero curve.S20, whether node control device 10 described in next stage is according to receiving the test letter
Whether number execution sends feedback signal to the zero curve.S30, whether the node control device 10 is according to receiving the feedback
Signal judges the on-off road feelings of the zero curve between node control device 10 described in the node control device 10 and next stage
Condition.S40, when open circuit occurs for the zero curve, the node control device 10 controls three firewires and disconnects.
In the S10, the controller 120 in the node control device 10 sends the test signal to described
Communication device 130, transmitting line 131 described in the communication device 130 is modulated the test signal, and is sent to institute
State zero curve.In the S20, in the node control device 10 described in next stage, circuit is received described in the communication device 130
132 receive the test signal through the zero curve, and are sent to the controller 120 after demodulating to the test signal.
The controller 120 equally sends feedback signal to the zero curve through the transmitting line 131 after receiving the test signal.
In the S30, the node control device 10 can be judged whether by the reception circuit 132 and the controller 120
The feedback signal is received, and then judges institute between node control device 10 described in the node control device 10 and next stage
State the logical open circuit conditions of zero curve.In the S40, when open circuit occurs for zero curve, i.e., the described node control device 10 is not received
To the feedback signal from node control device 10 described in next stage.At this point, the node control device 10, passes through the master control
Circuit 122 sends a signal to the driving circuit 123, and the subsequent driving circuit 123 controls the relay 124 and is attracted, into
It and is that the control coil 113 is powered.The control coil 113 can control the breaker by the operating mechanism 112
Contact 111 disconnects, to complete the open circuit protection to the zero curve.It is appreciated that the zero line break protection device controlling party
Method completes the on-off judgement to the intermediate zero curve by the transmission of the test signal and the reception of the feedback signal,
The process is not necessarily to measure the electric current and voltage in distribution network system, and the accurate of judgement is improved while simplifying deterministic process
Property.
In the zero line break protection device control method, n-th of node control device 10 and (n+1)th node control
It can be with two-way communication between device 10.Wherein, n-th of node control device 10, which issues signal, has directive property.For example, institute
The test signal of n-th of node control device 10 sending is stated only for (n+1)th node control device 10, other node controls
Device 10 processed receives the test signal can be without processing.Similarly, only (n+1)th node control device 10 can be sent out
Send feedback signal to n-th of node control device 10.N-th of node control device 10 and (n+1)th node
After control device 10 completes two-way communication, continues to send test signal by (n+1)th node control device 10, then wait
The n-th+2 node control devices 10 are transmitted back to feedback signal.Other node control devices 10 and so on, to complete to entire
The monitoring of distribution network zero curve, and then reduce fault coverage.
In one embodiment, in the S10, the controller 120 sends electric signal to the communication device 130.
The electric signal that the controller 120 is sent is modulated to high-frequency carrier signal by the communication device 130, and by the high frequency carrier
Signal is sent on the zero curve as the test signal.In the S120, the transmission electricity of the communication device 130
It road 131 can be by electric signal tune of the governor circuit 122 after the filtering shaping circuit 121 and/or the amplifying circuit
It is made as high-frequency carrier signal.It is appreciated that the high-frequency carrier signal has directive property.
In one embodiment, the S30 includes, if the node control device 10 receive within a preset time it is described
Feedback signal, then the zero curve between node control device 10 described in the node control device 10 and next stage is access, otherwise
For open circuit.Be understood that, it is contemplated that signal transmission need time and there may be delay situations such as, be rationally arranged described pre-
If the time.In the preset time, if the node control device 10 can receive from node control described in next stage
The feedback signal of device 10 then can be determined that between node control device 10 described in the node control device 10 and next stage
Zero curve is access.If exceeding the preset time, addressed node control device 10 do not receive the feedback signal also, then can be with
It is determined as open circuit.By the upper setting preset time, the zero line break protection device control method can be further increased
Accuracy, to improve the performance of the zero line break protection device 100.
In one embodiment, after the S30, comprising: if the node control device 10 connects within a preset time
The feedback signal is received, then the zero curve between node control device 10 described in the node control device 10 and next stage is logical
Road.If the node control device 10 is not received by the feedback signal, the node control device within a preset time
10 repeat to send on the test signal to the zero curve.The node control device 10 repeat to send the test signal and
After judging whether that receiving the feedback signal reaches preset times in the preset time, if the node control device 10 does not have
The feedback signal is received, then the zero curve between node control device 10 described in the node control device 10 and next stage
For open circuit.It is appreciated that the test signal or the feedback signal may be interfered in the transmission process of the zero curve,
To which the test signal or 10 nothing of node control device can not be received to node control device 10 described in next stage
Method is by the test signal.It, can be at this point, the node control device 10 repeats to send the test signal to the zero curve
The logical open circuit conditions of the zero curve are repeatedly judged, the standard of the zero line break protection device control method is further increased
True property.
In one embodiment, in the S30, if the communication device 130 received from the zero curve it is described anti-
Feedback signal, the communication device 130 are sent to the controller 120 after demodulating the feedback signal, and the controller 120 connects
The signal after the communication device 130 demodulates is received, then the node control device 10 and node control device described in next stage
Zero curve between 10 is access.It is appreciated that the feedback signal is also high-frequency carrier signal.The institute of the communication device 130
Reception circuit 132 is stated to receive the feedback signal from the zero curve and demodulated.The feedback signal after demodulation can be with
After the filtering shaping circuit 121 and/or the amplifying circuit are handled, it is transmitted to the governor circuit 122 and is sentenced
It is disconnected.
In one embodiment, the S20 include: node control device 10 described in next stage judge whether to receive it is described
Test signal.If node control device 10 described in next stage receives the test signal, the dress of node control described in next stage
The 10 transmissions feedback signal is set to the zero curve.If node control device 10 described in next stage is not received by the test letter
Number, then 10 attonity of node control device described in next stage.
In one embodiment, in the S40, the node control device 10 controls institute by the controller 120
It states breaker 110 and disconnects three firewires.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The several embodiments of the application above described embodiment only expresses, the description thereof is more specific and detailed, but simultaneously
The limitation to claim therefore cannot be interpreted as.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the concept of this application, various modifications and improvements can be made, these belong to the protection of the application
Range.Therefore, the scope of protection shall be subject to the appended claims for the application patent.
Claims (12)
1. a kind of zero line break protection device, the neutral line break for power distribution network is protected, and the power distribution network is three-phase four-wire system, packet
Include three firewires and a zero curve characterized by comprising
Multiple node control devices (10), the node control device (10) include:
Breaker (110), for controlling the on-off of three firewires；
Controller (120) is electrically connected with the breaker (110), for controlling combined floodgate and the tripping of the breaker (110),
And receiving and transmitting signal；And
Communication device (130) is electrically connected with the controller (120), for receiving and modulating the controller (120) transmission
Signal is simultaneously sent to zero curve, is also used to receive the signal loaded on the zero curve, and the controller (120) are transmitted to after demodulation.
2. zero line break protection device according to claim 1, which is characterized in that the communication device (130) includes:
Transmitting line (131) is electrically connected with the controller (120), for receiving the signal of the controller (120) transmission,
And by the signal modulation received be high-frequency carrier signal after be transmitted on the zero curve；And
It receives circuit (132), is electrically connected with the controller (120), for receiving the signal loaded on the zero curve, after demodulation
It is transmitted to the controller (120).
3. zero line break protection device according to claim 1, which is characterized in that the breaker (110) includes:
Contact of breaker (111), for controlling the on-off of three firewires；
Operating mechanism (112) is mechanically connected, for controlling the contact of breaker (111) with the contact of breaker (111)
Divide-shut brake；And
Control coil (113) is electrically connected with the controller (120) and the operating mechanism (112), the controller respectively
(120) after controlling control coil (113) energization, the contact of breaker (111) is controlled via the operating mechanism (112)
Divide-shut brake.
4. zero line break protection device according to claim 3, which is characterized in that the breaker (110) further includes closing
Sneek (114) is mechanically connected, for manually controlling the division of the contact of breaker (111) with the operating mechanism (112)
Lock.
5. zero line break protection device according to claim 1, which is characterized in that the controller (120) includes:
Filtering shaping circuit (121) is electrically connected with the communication device (130), for what is sent to the communication device (130)
Signal is filtered shaping；
Governor circuit (122) is electrically connected with the filtering shaping circuit (121), for receiving the filtering shaping circuit (121)
The signal of transmission is simultaneously handled；
Driving circuit (123) is electrically connected with the governor circuit (122), for receiving the control of the governor circuit (122) transmission
Signal processed；And
Relay (124) is electrically connected with the driving circuit (123), for receiving the driving of the driving circuit (123) transmission
Signal, and acted according to the driving signal.
6. a kind of zero line break protection device control method is used for any zero line break protection device of claim 1-5,
It is characterized in that, comprising:
S10, the node control device (10) send test signal to the zero curve；
S20, whether node control device (10) described in next stage is according to receiving the test signal and execute whether send feedback
Signal is to the zero curve；
S30, the node control device (10) judge the node control device according to whether the feedback signal is received
(10) between node control device (10) described in next stage the zero curve logical open circuit conditions；
S40, when open circuit occurs for the zero curve, the node control device (10) controls three firewires and disconnects.
7. a kind of zero line break protection device control method according to claim 6, which is characterized in that in the S10,
The controller (120) sends electric signal and gives the communication device (130), and the communication device (130) is by the controller
(120) electric signal sent is modulated to high-frequency carrier signal, and sends the high-frequency carrier signal as the test signal
On to the zero curve.
8. a kind of zero line break protection device control method according to claim 6, which is characterized in that in the S30,
If the node control device (10) receives the feedback signal within a preset time, the node control device (10) with
Zero curve between node control device (10) described in next stage is access, is otherwise open circuit.
9. a kind of zero line break protection device control method according to claim 6, which is characterized in that the S30 includes:
If the node control device (10) receives the feedback signal, the node control device within a preset time
(10) zero curve between node control device (10) described in next stage is access；
If the node control device (10) is not received by the feedback signal, the node control dress within a preset time
(10) are set to repeat to send on the test signal to the zero curve；
The node control device (10) repeats to send the test signal and judge whether to receive in the preset time
After the feedback signal reaches preset times, if the node control device (10) is not received by the feedback signal, institute
The zero curve between node control device (10) described in node control device (10) and next stage is stated as open circuit.
10. a kind of zero line break protection device control method according to claim 6, which is characterized in that in the S30
In, if the communication device (130) receives the feedback signal from the zero curve, the communication device (130) will be described
It is sent to the controller (120) after feedback signal demodulation, the controller (120) receives the communication device (130) solution
Signal after tune, then the zero curve between node control device (10) described in the node control device (10) and next stage is logical
Road.
11. a kind of zero line break protection device control method according to claim 6, which is characterized in that the S20 packet
It includes:
Node control device (10) described in next stage judges whether to receive the test signal；
If node control device (10) described in next stage receives the test signal, node control device described in next stage
(10) feedback signal is sent to the zero curve；
If node control device (10) described in next stage is not received by the test signal, the dress of node control described in next stage
Set (10) attonity.
12. a kind of zero line break protection device control method according to claim 6, which is characterized in that in the S40
In, the node control device (10) controls the breaker (110) by the controller (120) and disconnects three fire
Line.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910553070.2A CN110401176A (en) | 2019-06-25 | 2019-06-25 | Zero line disconnection protection device and control method thereof |
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| CN201910553070.2A CN110401176A (en) | 2019-06-25 | 2019-06-25 | Zero line disconnection protection device and control method thereof |
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