CN109061398A - A kind of low-voltage circuit monitoring system - Google Patents
A kind of low-voltage circuit monitoring system Download PDFInfo
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- CN109061398A CN109061398A CN201811197277.2A CN201811197277A CN109061398A CN 109061398 A CN109061398 A CN 109061398A CN 201811197277 A CN201811197277 A CN 201811197277A CN 109061398 A CN109061398 A CN 109061398A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/086—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution networks, i.e. with interconnected conductors
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Abstract
The embodiment of the present application discloses a kind of low-voltage circuit monitoring system, comprising: current acquisition mutual inductor, for acquiring the current value of low-voltage circuit；Voltage acquisition mutual inductor, for acquiring the voltage value of the low-voltage circuit；Fault warning module, for judging the low-voltage circuit with the presence or absence of exception, if exception occurs in the low-voltage circuit, sending alarm signal to main website according to the collected current value and the voltage value；Power module, for electric energy needed for providing system operation.
Description
Technical field
This application involves Distribution Automation Technology fields more particularly to a kind of low-voltage circuit to monitor system.
Background technique
As distribution network construction investment continues to increase, remarkable effect is obtained with electricity consumption development.
Currently, the monitoring device for being directed to distribution system is concentrated mainly on the both ends Tai Qu --- transformer terminal and user
End.In transformer terminal, it is equipped with distribution power automation terminal, such as DTU mainly to realize the monitoring of distribution transforming, it being capable of real-time measurement platform
The electric current of area's transformer side, voltage, active and idle etc. information, while the state of mesolow switch can also pass through automation eventually
End is to be monitored.And in user terminal, the monitoring device mainly used is intelligent electric meter, it being capable of electric current, electricity to user side
The information such as pressure and electric flux are monitored.
Relative to the monitoring capability at distribution system both ends, the status monitoring means with electricity consumption low-voltage circuit are obviously supported not
Foot, is temporarily monitored its state without module related measurement devices, and related monitoring data lack, to controlling for distribution system power quality
Reason, load monitoring and management, family become relationship consistency management and equipment monitoring and management etc. have manufactured blind area.
Summary of the invention
The embodiment of the present application provides a kind of low-voltage circuit monitoring system, and solving current electricity consumption low-voltage circuit of matching does not have
The technical issues of corresponding status monitoring means.
The embodiment of the present application provides a kind of low-voltage circuit monitoring system, comprising:
Current acquisition mutual inductor, for acquiring the current value of low-voltage circuit；
Voltage acquisition mutual inductor, for acquiring the voltage value of the low-voltage circuit；
Fault warning module, for judging the low-voltage circuit according to the collected current value and the voltage value
With the presence or absence of exception, if there is abnormal, transmission alarm signal to main website in the low-voltage circuit；
Power module, for electric energy needed for providing system operation.
Preferably, the power module specifically includes:
Induced current mutual inductor is located on the low-voltage circuit；
Rectification unit is connect with the induced current output end of the induced current mutual inductor；
Power supply unit is connected between rectification unit and system, is used for and system docking is to provide electric energy.
Preferably, the power module further include:
Reserve battery, the reserve battery are connect with said supply unit；
Mode conversion module, for system being switched to described standby in the non-inductive electric current of the induced current mutual inductor
It is powered with battery.
Preferably, further includes:
Analog-to-digital conversion module；
The current acquisition mutual inductor and the voltage acquisition mutual inductor pass through the analog-to-digital conversion module and the event
Hinder alarm module connection；
The analog-to-digital conversion module is used for the collected current value of current acquisition mutual inductor and the voltage acquisition
The collected voltage value of mutual inductor carries out digital sample.
Preferably, the sample frequency of the analog-to-digital conversion module is 500HZ.
Preferably, the analog-to-digital conversion module, which is also used to sample, obtains electric current and voltage is respectively converted into current effective value
With voltage effective value；
The system also includes:
Metering module, the voltage effective value and the electric current for being converted out according to the analog-to-digital conversion module are effective
Value carries out electric flux calculating.
Preferably, the mode conversion module is also used to start low-power consumption when the system is powered by the reserve battery
Mode, under the low-power consumption mode, the metering module stops working.
Preferably, further includes:
Specification conversion module is used for the collected current value of the current acquisition mutual inductor, the voltage acquisition mutual inductance
The alarm signal conversion that the collected voltage value of device, the calculated electric flux of the metering module and fault warning module are sent
For the information pattern of standard.
Preferably, the system is communicated especially by narrowband Internet of Things NB-IoT.
Preferably, further includes:
GPS module, for positioning the installation site of the system.
As can be seen from the above technical solutions, the embodiment of the present application has the advantage that
In the embodiment of the present application, a kind of low-voltage circuit monitoring system is provided, comprising: current acquisition mutual inductor, for adopting
Collect the current value of low-voltage circuit；Voltage acquisition mutual inductor, for acquiring the voltage value of low-voltage circuit；Fault warning module, is used for
According to collected current value and voltage value, judge that low-voltage circuit with the presence or absence of exception, if exception occurs in low-voltage circuit, sends and accuses
Signal is warned to main website；Power module, for electric energy needed for providing system operation.System provided by the embodiments of the present application passes through electricity
Stream acquisition mutual inductor and voltage acquisition mutual inductor are to the voltage of low-voltage circuit and being monitored for electric current, wherein fault warning module
Can judge whether low-voltage circuit is abnormal, issues alarm if having exception, realizes to low according to the electric current and voltage monitored
The monitoring on crimping road compensates for the blank of the current status monitoring with electricity consumption low-voltage circuit.
Detailed description of the invention
Fig. 1 is the structural schematic diagram for the first embodiment that a kind of low-voltage circuit provided by the present application monitors system；
Fig. 2 is the structural schematic diagram for second embodiment that a kind of low-voltage circuit provided by the present application monitors system；
Fig. 3 is the electric hookup of induced current mutual inductor in system shown in Figure 2；
Fig. 4 is the operation logic figure of mode conversion module in system shown in Figure 2；
Fig. 5 is the message format schematic diagram that specification conversion module is converted in system shown in Figure 2.
Specific embodiment
In order to make those skilled in the art more fully understand application scheme, below in conjunction in the embodiment of the present application
Attached drawing, the technical scheme in the embodiment of the application is clearly and completely described, it is clear that described embodiment is only this
Apply for a part of the embodiment, instead of all the embodiments.Based on the embodiment in the application, those of ordinary skill in the art exist
Every other embodiment obtained under the premise of creative work is not made, shall fall in the protection scope of this application.
Referring to Fig. 1, Fig. 1 is the structural representation for the first embodiment that a kind of low-voltage circuit provided by the present application monitors system
Figure.
As shown in Figure 1, including current acquisition mutual inductor 101, voltage acquisition mutual inductor 102, fault warning module in Fig. 1
103 and power module 104, current acquisition mutual inductor 101 can be set and be electrically connected with fault warning module 103, voltage acquisition
Mutual inductor 102 is also electrically connected with fault warning module 103；Power module 104 is then connect with whole system, for providing system
Electric energy required for running.
Current acquisition mutual inductor 101 can be used for acquiring the current value of low-voltage circuit；Voltage acquisition mutual inductor 102, can be with
For acquiring the voltage value of low-voltage circuit；Fault warning module 103 can be used for according to collected current value and voltage value,
Low-voltage circuit is judged with the presence or absence of exception, if abnormal, transmission alarm signal to main website occurs in low-voltage circuit.
It should be noted that the class of accuracy of current acquisition mutual inductor 101 and voltage acquisition mutual inductor 102 can on demand into
Row configuration, is usually configurable to 0.2S grades or 0.5S grades.The specific implementation of current acquisition mutual inductor 101 can use non-
The acquisition mode of contact, it can by ring set in the outside of surveyed low-voltage circuit (usually low-voltage cable), utilize low pressure
The actual current information of the reflection of induced current caused by changes of magnetic field low-voltage circuit in route.
Voltage acquisition mutual inductor 102 can use the acquisition mode of contact, directly and low-voltage circuit by metal pricker
Contact can be contacted in a manner of puncture with the plain conductor of low-voltage cable if low-voltage circuit is cable, low to measure with this
The voltage on crimping road.
The effect of fault warning module 103 be the current value and voltage value of collected low-voltage circuit are judged, if
It notes abnormalities, is then sent as alarm signal in main website.In terms of the alarm function supported includes but is not limited to following four:
1) low-voltage alerts: the threshold value by the way that voltage is arranged, and when the voltage monitored is lower than the threshold value, issues alarm letter
Number, which is mainly used to monitor the low-voltage problem of route；
2) low current alerts: the lower threshold by the way that electric current is arranged is issued and is accused when the electric current monitored is lower than the threshold value
Alert signal, the alarm function are mainly used for monitoring the disconnection fault of route；
3) overcurrent alerts: the upper limit threshold by the way that electric current is arranged issues alarm when the electric current monitored is higher than the threshold value
Signal, the alarm function are mainly used for monitoring electric leakage or the short trouble of route；
4) system itself alerts: when system itself fail, then issuing system itself alarm.
In the application one embodiment, a kind of low-voltage circuit monitoring system is provided, comprising: current acquisition mutual inductor,
For acquiring the current value of low-voltage circuit；Voltage acquisition mutual inductor, for acquiring the voltage value of low-voltage circuit；Fault warning mould
Block, for judging low-voltage circuit with the presence or absence of exception, if low-voltage circuit appearance is different according to collected current value and voltage value
Often, alarm signal is sent to main website；Power module, for electric energy needed for providing system operation.It is provided by the embodiments of the present application
System passes through current acquisition mutual inductor and voltage acquisition mutual inductor to the voltage of low-voltage circuit and being monitored for electric current, wherein therefore
Barrier alarm module can judge whether low-voltage circuit is abnormal, issues alarm if having exception according to the electric current and voltage monitored,
The monitoring to low-voltage circuit is realized, the blank of the current status monitoring with electricity consumption low-voltage circuit is compensated for.
It is the detailed description for the low-voltage circuit monitoring system that the application one embodiment provides above, refers to figure below
2, Fig. 2 be a kind of structural schematic diagram of second embodiment of low-voltage circuit monitoring system provided by the present application, can be above-mentioned
It is improved on the basis of one embodiment.
There are many specific implementations of power module 104, can be and directly uses battery as power supply, but considers
Longtime running is needed to system, the runing time of battery is shorter, needs regular more preferable, therefore sense can be used in power module
Current transformer 201 is answered, the induced current mutual inductor is similar with the current acquisition mutual inductor 101 in above-mentioned one embodiment,
Contactless inductive pick-up mode is equally used, is located on low-voltage circuit.
Power module 104 is also accordingly provided with rectification unit and power supply unit 202, may refer to Fig. 3, and Fig. 3 is shown in Fig. 2
The electric hookup of induced current mutual inductor in system.Wherein, rectification unit can rectify the electric current sensed, can also
To play the role of certain burning voltage, it is connect with the induced current output end of induced current mutual inductor；Power supply unit
202, can connect between rectification unit and system, mainly and system docking, specifically, highly reliable work can be used
Industry grade DC power supply, voltage are 24V or 48V, and power output is between 10W to 50W.
When in view of powering by induced current mutual inductor 201, once failures, the routes such as broken string, which occur, for low-voltage circuit does not have
Electric current flows through, then system is just in the state of non-transformer power supply.In order to enable a system to reliability service, can be set one it is standby
With battery 203, reserve battery 203 can be connect by above-mentioned power supply unit 202 with system.When specific implementation, reserve battery
203 can be 1Ah with type selecting battery capacity, and the reserve battery 203 of the battery capacity maintains equipment under system low-power consumption mode
Work 8 hours, supports the repairing of route and the replacement of equipment.
It should be noted that the metering module 206 of system will stop working when system is in low-power consumption mode.Related meter
The content of amount module 206 can be illustrated subsequent.
When implementing the switching that the power supply of reserve battery 203 is powered with induced current mutual inductor 201, setting can be passed through
Mode conversion module 204 is responsible for the work.It can configure mode conversion module 204 to noninductive in induced current mutual inductor 101
When answering electric current, it is switched to the power supply of reserve battery 203, it can be being sent to main station system in the malfunction of route with guarantee system
On.
Mode conversion module 204 has been also responsible for the switching of above-mentioned low-power consumption mode, specifically refers to Fig. 4, Fig. 4 Fig. 2
The operation logic figure of mode conversion module in shown system.Low-power consumption mode is that the mode powered with reserve battery 203 cooperates,
Mode conversion module 204 can be by the current direction between monitoring reserve battery 203 and power supply unit 202 come identifying system
Powering mode can star low-power consumption mode when the system of identifying, which switches to reserve battery 203, powers.
System in the present embodiment further includes analog-to-digital conversion module 205, should be with current acquisition mutual inductor 101 and voltage
The connection of both mutual inductors 102 is acquired, for the collected current value of current acquisition mutual inductor 101 and voltage acquisition mutual inductor
102 collected voltage values carry out digital sample.In view of the cost problem of system, the modulus of lower sample frequency can be selected
Conversion module 205, for example 10 points can be taken with a cycle, i.e., sample frequency is 50 × 10=500Hz.
Analog-to-digital conversion module 205 electric current that digital sample obtains and voltage can also be respectively converted into current effective value with
Voltage effective value, the current effective value converted out and voltage effective value can be sent to metering module 206.Metering module 206 can
To carry out the calculating of electric flux, calculated electric flux has certain booster action to the line loss analyzing of low-voltage circuit.
When being communicated with main website, since the communication protocol of system and main website is not necessarily identical, rule can be set
About conversion module 207 can collect the collected current value of current acquisition mutual inductor 101, voltage acquisition mutual inductor 102
Voltage value, the alarm signal that sends of the calculated electric flux of metering module 206 and fault warning module 103 be converted into standard
Information pattern, certainly, the information actually converted can be not limited to above-mentioned four kinds, be converted to after mode standard and carry out to information
Group packet, is sent to main website.Message format may refer to Fig. 5, and Fig. 5 is the report that specification conversion module is converted in system shown in Figure 2
Literary form schematic diagram.
As shown in figure 5, preceding 20 bytes are mainly header and address information, subsequent is respectively current value, voltage value and electricity
Energy is assigned with 6 bytes, for four class alarm signals of fault warning module 103, distributes 12 bytes altogether for it, is simultaneously
GPS positioning information provides the parking space of 4 bytes.It should be noted that above-mentioned GPS positioning information can pass through GPS mould
Block 209 is realized, is positioned so as to the installation site to system, is equivalent to and positions indirectly to faulty line.
In specific communication, can be communicated by narrowband Internet of Things NB-IoT, NB-IoT can be realized the low of equipment
Energy consumption and wide-area communication, can be by being arranged NB-IoT communication module 208, and NB-IoT communication module 208 can be converted with specification
Module 207 connects.
In second embodiment of the application, a kind of low-voltage circuit monitoring system is provided, comprising: current acquisition mutual inductor,
For acquiring the current value of low-voltage circuit；Voltage acquisition mutual inductor, for acquiring the voltage value of low-voltage circuit；Fault warning mould
Block, for judging low-voltage circuit with the presence or absence of exception, if low-voltage circuit appearance is different according to collected current value and voltage value
Often, alarm signal is sent to main website；Power module, for electric energy needed for providing system operation.It is provided by the embodiments of the present application
System passes through current acquisition mutual inductor and voltage acquisition mutual inductor to the voltage of low-voltage circuit and being monitored for electric current, wherein therefore
Barrier alarm module can judge whether low-voltage circuit is abnormal, issues alarm if having exception according to the electric current and voltage monitored,
The monitoring to low-voltage circuit is realized, the blank of the current status monitoring with electricity consumption low-voltage circuit is compensated for.
The above, above embodiments are only to illustrate the technical solution of the application, rather than its limitations；Although referring to before
Embodiment is stated the application is described in detail, those skilled in the art should understand that: it still can be to preceding
Technical solution documented by each embodiment is stated to modify or equivalent replacement of some of the technical features；And these
It modifies or replaces, the spirit and scope of each embodiment technical solution of the application that it does not separate the essence of the corresponding technical solution.
Claims (10)
1. a kind of low-voltage circuit monitors system characterized by comprising
Current acquisition mutual inductor, for acquiring the current value of low-voltage circuit；
Voltage acquisition mutual inductor, for acquiring the voltage value of the low-voltage circuit；
Fault warning module, for whether judging the low-voltage circuit according to the collected current value and the voltage value
There are exceptions, if abnormal, transmission alarm signal to main website occurs in the low-voltage circuit；
Power module, for electric energy needed for providing system operation.
2. system according to claim 1, which is characterized in that the power module specifically includes:
Induced current mutual inductor is located on the low-voltage circuit；
Rectification unit is connect with the induced current output end of the induced current mutual inductor；
Power supply unit is connected between rectification unit and system, is used for and system docking is to provide electric energy.
3. system according to claim 2, which is characterized in that the power module further include:
Reserve battery, the reserve battery are connect with said supply unit；
Mode conversion module, in the non-inductive electric current of the induced current mutual inductor, system to be switched to the standby electricity
Pond power supply.
4. system according to claim 1 or 3, which is characterized in that further include:
Analog-to-digital conversion module；
The current acquisition mutual inductor and the voltage acquisition mutual inductor are accused by the analog-to-digital conversion module and the failure
Alert module connection；
The analog-to-digital conversion module is used for the collected current value of current acquisition mutual inductor and the voltage acquisition mutual inductance
The collected voltage value of device carries out digital sample.
5. system according to claim 4, which is characterized in that the sample frequency of the analog-to-digital conversion module is 500HZ.
6. system according to claim 4, which is characterized in that
The analog-to-digital conversion module, which is also used to the electric current that sampling obtains being respectively converted into current effective value and voltage with voltage, to be had
Valid value；
The system also includes:
Metering module, the voltage effective value for being converted out according to the analog-to-digital conversion module and the current effective value into
Row electric flux calculates.
7. system according to claim 6, which is characterized in that the mode conversion module is also used in the system by institute
It states and starts low-power consumption mode when reserve battery is powered, under the low-power consumption mode, the metering module stops working.
8. system according to claim 6, which is characterized in that further include:
Specification conversion module, for adopting the collected current value of the current acquisition mutual inductor, the voltage acquisition mutual inductor
The alarm signal that voltage value, the calculated electric flux of the metering module and the fault warning module collected is sent is converted into mark
Quasi- information pattern.
9. system according to claim 1, which is characterized in that the system is carried out especially by narrowband Internet of Things NB-IoT
Communication.
10. system according to claim 1, which is characterized in that further include:
GPS module, for positioning the installation site of the system.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811197277.2A CN109061398A (en) | 2018-10-15 | 2018-10-15 | A kind of low-voltage circuit monitoring system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811197277.2A CN109061398A (en) | 2018-10-15 | 2018-10-15 | A kind of low-voltage circuit monitoring system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111722051A (en) * | 2019-03-22 | 2020-09-29 | 江苏和网源电气有限公司 | Intelligent low-voltage shunt monitoring unit |
| CN113671310A (en) * | 2021-07-14 | 2021-11-19 | 广西电网有限责任公司桂林供电局 | Alternating current system branch fault monitoring system and method |
| CN114825581A (en) * | 2021-06-30 | 2022-07-29 | 长城汽车股份有限公司 | Vehicle low-voltage power grid exception handling method and device, vehicle and computer readable storage medium |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108258648A (en) * | 2018-02-06 | 2018-07-06 | 陕西省地方电力（集团）有限公司安康供电分公司 | A kind of low-voltage network malfunction monitoring localization method |
-
2018
- 2018-10-15 CN CN201811197277.2A patent/CN109061398A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108258648A (en) * | 2018-02-06 | 2018-07-06 | 陕西省地方电力（集团）有限公司安康供电分公司 | A kind of low-voltage network malfunction monitoring localization method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111722051A (en) * | 2019-03-22 | 2020-09-29 | 江苏和网源电气有限公司 | Intelligent low-voltage shunt monitoring unit |
| CN114825581A (en) * | 2021-06-30 | 2022-07-29 | 长城汽车股份有限公司 | Vehicle low-voltage power grid exception handling method and device, vehicle and computer readable storage medium |
| CN113671310A (en) * | 2021-07-14 | 2021-11-19 | 广西电网有限责任公司桂林供电局 | Alternating current system branch fault monitoring system and method |
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