CN208921783U - Line loss fine-grained management device - Google Patents
Line loss fine-grained management device Download PDFInfo
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- CN208921783U CN208921783U CN201821201924.8U CN201821201924U CN208921783U CN 208921783 U CN208921783 U CN 208921783U CN 201821201924 U CN201821201924 U CN 201821201924U CN 208921783 U CN208921783 U CN 208921783U
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Abstract
The utility model provides a kind of line loss fine-grained management device, comprising: voltage acquisition module, CT acquisition module, metering acquisition module, data processing module and alarm module；The voltage acquisition module and the CT acquisition module are set to the end of incoming cables of ammeter box, are respectively used to the voltage value and current value of acquisition ammeter box front end；The metering acquisition module is used to acquire the electrical parameter of each electric supply meter in ammeter box；The data processing module is used to calculate line loss or line loss per unit according to electrical parameter collected in the voltage value, current value and the ammeter box of the ammeter box front-end collection, also judges whether the line loss or line loss per unit are more than preset threshold and send alarm signal when the line loss or line loss per unit are more than the preset threshold.The utility model can realize the real-time statistics and monitoring analysis of the line loss of the branched line as unit of ammeter box, and line loss fine-grained management level and decreasing loss working efficiency also can be improved.
Description
Technical field
The utility model relates to field of power system more particularly to a kind of line loss fine-grained management devices.
Background technique
Line loss in electric system is generally divided into technical loss and management line loss, and technical loss is by equipment and route itself
Technical parameter caused by energy loss, this loss is inevitable；Management loss is mainly due to the mistake of management aspect
Energy loss caused by accidentally, such as artificial stealing, line electrical leakage, short circuit etc., and it is avoidable for managing loss.Therefore
The method for reducing line loss is usually to overcome management line loss, and the loss of unnecessary appearance is allowed no longer to occur, and is the most straight of reduction line loss
It connects, a kind of most effective method.
In the prior art, the Controlling line loss of electric system is mainly the mode for being in management result, that is to say, that Mei Daoyue
The height of bottom statistical line losses rate, by the height of moon line loss per unit come the management level and management of which Controlling line loss unit of assay
Process it is good with it is bad.Since the management measure of this management mode is in the benefit formulated according to the administrative situation in a upper period afterwards
Measure is rescued, there are apparent hysteresis quality and management cycle more long this disadvantage is more obvious, and efficiency is lower.In addition, this line loss
For management minimum as unit of transformer platform area, management degree of refinement is also not high enough.
Utility model content
In view of the above problems, the utility model provides a kind of line loss fine-grained management device to solve the line of the prior art
The problems such as damaging administrative delay and not high fining degree.
The utility model proposes line loss fine-grained management device, comprising: voltage acquisition module, CT acquisition module, metering
Acquisition module, data processing module and alarm module；Wherein, the voltage acquisition module, CT acquisition module, metering acquisition module
It is connect with the data processing module with alarm module；
The voltage acquisition module and the CT acquisition module are set to the end of incoming cables of ammeter box, are respectively used to acquisition ammeter
The voltage value and current value of case front end；
The metering acquisition module is connect with electric supply meter in the ammeter box, for acquiring each electric supply meter in ammeter box
Electrical parameter；
The data processing module is used for voltage value, current value and the ammeter according to the ammeter box front-end collection
Collected electrical parameter calculates line loss or line loss per unit in case, also judge the line loss or line loss per unit whether be more than preset threshold simultaneously
Alarm signal is sent when the line loss or line loss per unit are more than the preset threshold；
The alarm module is used to carry out Realtime Alerts according to the alarm signal.
As further alternative scheme, the utility model line loss fine-grained management device, further includes: wireless telecommunications mould
Block,
The wireless communication module is connect with the data processing module, for the data processing module to be calculated
Line loss data and the alarm signal be sent to remote terminal to realize long-range monitoring and alarm.
As further alternative scheme, the voltage acquisition module includes reduction voltage circuit, sample circuit and conversion circuit,
The reduction voltage circuit, sample circuit and conversion circuit are successively electrically connected, wherein
The reduction voltage circuit is used to acquire the input voltage of the ammeter box end of incoming cables and drops the input power
Pressure processing；
The sample circuit is used to carry out AC sampling to the voltage after decompression to obtain sampled voltage；
The conversion circuit is for being converted into digital voltage for the sampled voltage and being sent into the data processing module.
As further alternative scheme, the metering acquisition module includes collector, and the collector is total by RS485
Line connects each electric supply meter in the ammeter box and acquires the electrical parameter of each electric supply meter in real time.
As further alternative scheme, the CT acquisition module includes at least one current transformer, and the electric current is mutual
Sensor is used to acquire the current value of the ammeter box end of incoming cables and the current value is sent into the data processing module.
As further alternative scheme, the metering acquisition module includes collector, and the collector is total by RS485
Line connects each electric supply meter in the ammeter box and acquires the electrical parameter of each electric supply meter in real time.
As further alternative scheme, the alarm module includes buzzer and/or indicator light.
As further alternative scheme, the wireless communication module includes: GPRS module, 4G module, 3G module, GSM
One of module or multiple combinations.
As further alternative scheme, the utility model line loss fine-grained management device, further includes: Peripheral Interface mould
Block, the Peripheral Interface include one of 485 bus interface, USB interface, RS232 interface, RJ5 interface or multiple combinations；Its
In,
The peripheral interface module is used to other external equipments being connected to the data processing module to realize that function expands
Exhibition.
As further alternative scheme, the data processing module further include: memory,
The memory is used to store the voltage value of the real-time collected electricity box front end, current value, electricity box rear end
Electrical parameter and the line loss data being calculated by the data processing module.
As further alternative scheme, the data processing module includes master controller, wherein the master controller is adopted
With ARM series processors chip.
Technical solution provided by the utility model has the following beneficial effects:
The automatic detection and analysis of the line loss of the branched line as unit of ammeter box may be implemented in the utility model, and
Realtime Alerts are carried out when line loss is more than preset threshold, so that the timeliness of Controlling line loss can be improved, solve existing line loss pipe
The lag issues of reason.In addition, can further improve the fining degree of Controlling line loss by installing the device at ammeter box also.
Detailed description of the invention
It, below will be to use required in embodiment in order to illustrate more clearly of the technical solution of the utility model embodiment
Attached drawing be briefly described, it should be understood that the following drawings illustrates only some embodiments of the utility model, therefore should not be by
Regard the restriction to range as, for those of ordinary skill in the art, without creative efforts, may be used also
To obtain other relevant attached drawings according to these attached drawings.
Fig. 1 is the application schematic diagram of the line loss fine-grained management device of the utility model embodiment；
Fig. 2 is the first structure diagram of the line loss fine-grained management device of the utility model embodiment；
Fig. 3 is the structural schematic diagram of the voltage acquisition module of the line loss fine-grained management device of the utility model embodiment；
Fig. 4 is the second structural schematic diagram of the line loss fine-grained management device of the utility model embodiment.
Main element symbol description:
10- line loss fine-grained management device；100- voltage acquisition module；101- reduction voltage circuit；102- sample circuit；103-
Conversion circuit；200-CT acquisition module；300- measures acquisition module；400- data processing module；500- alarm module；600- without
Line communication module；700- peripheral interface module.
Specific embodiment
Hereinafter, the various embodiments of the disclosure will be described more fully.The disclosure can have various embodiments, and
It can adjust and change wherein.It should be understood, however, that: there is no disclosure protection scope is limited to specific reality disclosed herein
The intention of example is applied, but the disclosure should be interpreted as to all in the spirit and scope for covering the various embodiments for falling into the disclosure
Adjustment, equivalent and/or optinal plan.
Hereinafter, can the term " includes " used in the various embodiments of the disclosure or " may include " instruction disclosed in
Function, operation or the presence of element, and do not limit the increase of one or more functions, operation or element.In addition, such as existing
Used in the various embodiments of the disclosure, term " includes ", " having " and its cognate are meant only to indicate special characteristic, number
Word, step, operation, the combination of element, component or aforementioned item, and be understood not to exclude first one or more other
Feature, number, step, operation, element, component or aforementioned item combined presence or increase one or more features, number,
Step, operation, element, component or aforementioned item combination a possibility that.
The statement (" first ", " second " etc.) used in the various embodiments of the disclosure can be modified in various implementations
Various constituent element in example, but respective sets can not be limited into element.For example, the above statement is not intended to limit the suitable of the element
Sequence and/or importance.The above statement is only used for the purpose for differentiating an element and other elements.For example, the first user fills
It sets and indicates different user device with second user device, although the two is all user apparatus.For example, not departing from each of the disclosure
In the case where the range of kind embodiment, first element is referred to alternatively as second element, and similarly, second element is also referred to as first
Element.
It should also be noted that if a constituent element ' attach ' to another constituent element by description, it can be by the first composition member
Part is directly connected to the second constituent element, and " connection " third can form between the first constituent element and the second constituent element
Element.On the contrary, when a constituent element " being directly connected to " is arrived another constituent element, it will be appreciated that in the first constituent element
And second third constituent element is not present between constituent element.
The term used in the various embodiments of the disclosure is used only for the purpose of describing specific embodiments and not anticipates
In the various embodiments of the limitation disclosure.Unless otherwise defined, otherwise all terms used herein (including technical term and
Scientific term) there is contain identical with the various normally understood meanings of embodiment one skilled in the art of the disclosure
Justice.The term (term such as limited in the dictionary generally used) be to be interpreted as have in the related technical field
The identical meaning of situational meaning and Utopian meaning or meaning too formal will be interpreted as having, unless this
It is clearly defined in disclosed various embodiments.
The covering of low pressure centralized automatic meter-reading is completed, it can be achieved that the big data of low-voltage collecting meter reading system is divided in most of area at present
Analysis, further, this fining analysis for being also line loss and management create advantage.The utility model proposes a kind of line losses
Fine-grained management device, the end of incoming cables by the way that the device to be installed on to ammeter box can realize the branch counted as unit of ammeter box
The line loss of route, and when line is heard more than threshold value can Realtime Alerts, so as to solve existing Controlling line loss lag, low efficiency
And refine the problems such as degree is not high enough.Wherein, ammeter box is the infrastructure for installing the equipment such as ammeter, switch, conducting wire concentratedly,
Each area is provided with the ammeter box to facilitate and carry out power consumption management etc..
Embodiment
Fig. 1 is please referred to, a kind of line loss fine-grained management device 10 provided in this embodiment is managed by refining the line loss
Reason device 10 is mounted on the end of incoming cables of ammeter box, it can be achieved that carrying out the fine-grained management of line loss to the branched line of ammeter box and dividing
Analysis also carries out scene or remote alarms through setting preset threshold and when current line loss or line loss per unit are more than the preset threshold
Deng to realize the long-range monitoring of Controlling line loss, to can also further find in time and prevent the illegal events such as power stealing, electric leakage.
Referring to figure 2., the line loss fine-grained management device 10 that the present embodiment proposes, it may include: voltage acquisition module 100,
CT acquisition module 200, metering acquisition module 300, data processing module 400 and alarm module 500, wherein voltage acquisition module
100, CT acquisition module 200, metering acquisition module 300 and alarm module 500 are connect with data processing module 400.
In the present embodiment, voltage acquisition module 100 and CT acquisition module 200 are used respectively set on the end of incoming cables of ammeter box
Voltage value and current value in acquisition ammeter box front end, wherein the ammeter box can be three-phase electricity meter box or single-phase electricity electricity box.If should
The end of incoming cables of ammeter box is three-phase electricity, then can collect respectively three-phase electricity by voltage acquisition module 100 and CT acquisition module 200
Pressure value and three-phase electricity flow valuve, and collected three-phase voltage value is transferred to data processing module 400 with three-phase electricity flow valuve and is carried out
Corresponding analysis processing, such as calculate the three-phase electricity general power of electricity box front end.If should be appreciated that, the end of incoming cables of the ammeter box is single
Mutually electricity, then can collect the single-phase voltage value and current value of ammeter box end of incoming cables.
Exemplarily, as shown in figure 3, voltage acquisition module 100 may include reduction voltage circuit 101, sample circuit 102 and conversion
Circuit 103, wherein reduction voltage circuit 101, sample circuit 102 and conversion circuit 103 are sequentially connected.Specifically, reduction voltage circuit 101
It is mainly used for acquiring the input voltage of ammeter box front end, such as three-phase alternating current or single-phase alternating current, and the voltage is depressured
Processing；Sample circuit 102 is mainly used for carrying out analog sampling to the voltage after decompression to obtain sampled voltage；And conversion circuit
103 numbers for being mainly used for for the sampled voltage exported by sample circuit 102 being converted into the recognizable processing of data processing module 400
Word voltage is simultaneously sent into data processing module 400.
Exemplarily, CT acquisition module 200 may include at least one current transformer, which can be used for acquiring
The current value of phase line is accessed in the ammeter box end of incoming cables and the current value is sent into data processing module 400.For example, when ammeter box into
When line end access is three-phase electricity, the quantity of the current transformer can be set as 3 and be separately connected each mutually for adopting of three-phase
Collect the current value of each phase.
Multiple electric supply meters are usually mounted in ammeter box, which can be used for obtaining the electricity of active user's load
Parameter, for example, voltage, electric current, power factor and electric energy etc..In the present embodiment, metering acquisition module 300 is connected in ammeter box
Each electric supply meter acquires the electrical parameters such as voltage, electric current and power factor of each electric supply meter to realize, and after acquiring successfully
Data processing module 400 is sent to the total power value for computational chart box back.
Exemplarily, which may include collector, which can pass through RS485 bus and ammeter
Each electric supply meter in case is attached and acquires the electrical parameter of each electric supply meter in real time.Certainly, during practice,
If having accessed ammeter collector in ammeter box, the Peripheral Interface and the electricity of this line loss fine-grained management device 10 can be passed through
Table collector is directly connected to and reads the electrical parameter of each electric supply meter.
Preferably, as shown in Figure 1, if it exists compared with New multiple-user meter when, it is contemplated that may due to network signal difference etc. because
Element leads to the electrical parameter that all electric supply meters cannot be collected under synchronization, can then join to the electricity of each electric supply meter
Number carries out multi collect, and calculates real-time line loss or line using the electrical parameter of the collected all electric supply meters of synchronization
Loss rate can just guarantee the accuracy for the real-time line loss being calculated in this way.On the other hand, if leakage occur adopts one of user
The case where ammeter, then will make the line loss value being calculated that will will appear error bigger than normal, this, which may cause, will appear erroneous judgement situation.
Data processing module 400 get electricity box front-end collection to voltage value, acquire in current value and ammeter box
Each electric supply meter electrical parameter after, real-time line loss and/or line loss per unit will be calculated, also judge the line loss and/or line loss per unit
Whether it is more than preset threshold and is carried out sending alarm signal when the line loss is more than the preset threshold to alarm module 500
Alarm.
Since, there are multipoint line, line loss refers mainly to the power loss generated on each route on low-voltage circuit, pass through meter
The size for calculating power loss can calculate line loss value.In the present embodiment, which passes through the general power for calculating the input of ammeter box front end
It is obtained with the power difference of the general power of electric supply meter each in ammeter box output.Exemplarily, data processing module 400 can be pressed
Line loss value is calculated according to following steps:
(a) according to the voltage value U of ammeter box front-end collection and current value I, power-factor cos θ and ammeter box front end are calculated
Total power value P, wherein P=UIcos θ, θ are the phase angle of voltage and current.
If should be appreciated that, ammeter box access is three-phase electricity, and each phase voltage value acquired is respectively U1、U2、U3, each phase
Current value is I1、I2、I3；At this point, the general power P of ammeter box front end is the sum of each phase power, that is, there is the general power of ammeter box front end
Value P=∑ UnIncosθn, wherein n=1,2,3, θnFor the phase voltage of each phase and the phase angle of phase current.
(b) according to the electrical parameter of each electric supply meter acquired in ammeter box, the general power P2 of all electric supply meters is calculated,
Wherein, which includes the voltage u, electric current i and power factor of each electric supply meter current recordAndM=1,2 ..., k, k are the quantity of the electric supply meter actually connected.
(c) line loss value is calculated according to line loss calculation formula △ P=P-P2.Further, line can be calculated by above-mentioned line loss value
Loss rate, according to the concept of line loss per unit, it is known that line loss per unit is that the electric energy of loss accounts for the percentage of line powering electric energy.The present embodiment
In, real-time line loss per unit can be calculated by the general power P that the power loss △ P of above-mentioned calculating is inputted with ammeter box front end, that is, be had
(△ P/P) * 100%.
Exemplarily, user can choose default line loss threshold of the empirical value as the present embodiment according to actual power situation
Value or line loss per unit threshold value.When the above-mentioned line loss value being calculated or line loss per unit are more than the preset threshold, then alarm signal is sent
To alarm module 500.Preferably, value, line loss per unit threshold value can set 2%~3% based on practical experience.
Exemplarily, data processing module 400 mainly includes master controller, it is preferable that the master controller can be used at ARM
Manage device, such as ARM7 family chip, ARM9 family chip.Arm processor has powerful control processing function and has
The features such as small in size, low-power consumption, low cost, high-performance.In addition, arm processor also supports Thumb16 and ARM32 pairs
Instruction set can be compatible with 8/16 devices well and use a large amount of register, have instruction execution speed fast and execute
The features such as high-efficient.
Optionally, which can also include memory, which connects master controller, can be used for
Store the voltage value of collected above-mentioned ammeter box front end in real time, current value, in ammeter box the electrical parameter of each electric supply meter and
The related data such as the line loss being calculated by master controller can facilitate the subsequent access of user and further analysis etc. in this way.When
So, which can also be realized using including the single-chip microcontroller of the components such as arithmetic unit, data storage, such as
STM32 single-chip microcontroller etc..
Alarm module 500 will alarm after receiving the alarm signal issued by master controller.Exemplarily, the report
Alert module 500 may include buzzer and/or indicator light.
Referring to figure 4., optionally, which may also include wireless communication module 600, channel radio
News module 600 is connect with data processing module 400, can be calculated data processing module 400 according to order of master controller etc.
To line loss data and alarm signal be sent to remote terminal to realize long-range monitoring and Realtime Alerts etc..Exemplarily, the nothing
Line communication module 600 may include but be not limited to as one of GPRS module, 4G module, 3G module and gsm module etc. or a variety of
Combination.
In view of the line loss fine-grained management device 10 may need to carry out the extension of Controlling line loss function with other equipment,
Optionally, which may also include that peripheral interface module 700, which can be used for
Other external equipments are connected to data processing module 400 to realize Function Extension.Exemplarily, the peripheral interface module 700
It may include one of 485 bus interface, USB interface, RS232 interface, RJ5 interface etc. or multiple combinations.In addition, the line loss is smart
ZOOM analysis device 10 can also include the expansion modules such as infrared communication module, door contact.
A kind of line loss fine-grained management device that the present embodiment proposes is mostly installed at the end of incoming cables of each ammeter box, passes through
It calculates power loss and obtains real-time line loss value and setting line loss threshold value to detect whether current line loss is more than the threshold value, and be more than
Real-time live and/or remote auto alarm are carried out when the threshold value.This not only realizes the automatic detection and analysis of line loss, may be used also
To remind user's line loss abnormal conditions in time by remote alarms, so that the timeliness of Controlling line loss can be improved, solve existing
There are the lag issues of Controlling line loss.In addition, may know that corresponding point of which ammeter box by installing the device at each ammeter box
There is line loss abnormal problem in branch line, realizes from existing transformer platform area to be that management unit is accurate to each ammeter box branch
Route is that the line loss of unit counts, to further increase the fining degree of Controlling line loss.
It will be appreciated by those skilled in the art that the accompanying drawings are only schematic diagrams of a preferred implementation scenario, module in attached drawing or
Process is not necessarily implemented necessary to the utility model.
It will be appreciated by those skilled in the art that the module in device in implement scene can be described according to implement scene into
Row is distributed in the device of implement scene, can also be carried out corresponding change and is located at the one or more dresses for being different from this implement scene
In setting.The module of above-mentioned implement scene can be merged into a module, can also be further split into multiple submodule.
Above-mentioned the utility model serial number is for illustration only, does not represent the superiority and inferiority of implement scene.Disclosed above is only this
Several specific implementation scenes of utility model, still, the utility model is not limited to this, any those skilled in the art's energy
Think of variation should all fall into the protection scope of the utility model.
Claims (10)
1. a kind of line loss fine-grained management device characterized by comprising voltage acquisition module, CT acquisition module, metering acquisition
Module, data processing module and alarm module；Wherein, the voltage acquisition module, CT acquisition module, metering acquisition module and report
Alert module is connect with the data processing module；
The voltage acquisition module and the CT acquisition module are set to the end of incoming cables of ammeter box, before being respectively used to acquisition ammeter box
The voltage value and current value at end；
The metering acquisition module is connect with electric supply meter in the ammeter box, for acquiring the electricity of each electric supply meter in ammeter box
Measure parameter；
The data processing module is used for according in the voltage value, current value and the ammeter box of the ammeter box front-end collection
Collected electrical parameter calculates line loss or line loss per unit, also judges whether the line loss or line loss per unit are more than preset threshold and in institute
Alarm signal is sent when stating line loss or line loss per unit more than the preset threshold；
The alarm module is used to carry out Realtime Alerts according to the alarm signal.
2. line loss fine-grained management device according to claim 1, which is characterized in that further include: wireless communication module,
The wireless communication module is connect with the data processing module, the line for the data processing module to be calculated
Damage data and the alarm signal are sent to remote terminal to realize long-range monitoring and alarm.
3. line loss fine-grained management device according to claim 1, which is characterized in that the voltage acquisition module includes drop
Volt circuit, sample circuit and conversion circuit, the reduction voltage circuit, sample circuit and conversion circuit are successively electrically connected, wherein
The reduction voltage circuit is used to acquire the input voltage of the ammeter box end of incoming cables and carries out the input voltage at decompression
Reason；
The sample circuit is used to carry out AC sampling to the voltage after decompression to obtain sampled voltage；
The conversion circuit is for being converted into digital voltage for the sampled voltage and being sent into the data processing module.
4. line loss fine-grained management device according to claim 1, which is characterized in that the CT acquisition module includes at least
One current transformer, the current transformer is used to acquire the current value of the ammeter box end of incoming cables and the current value is sent into
The data processing module.
5. line loss fine-grained management device according to claim 1, which is characterized in that the metering acquisition module includes adopting
Storage, the collector connect in the ammeter box each electric supply meter by RS485 bus and acquire each electric supply meter in real time
Electrical parameter.
6. line loss fine-grained management device according to claim 1, which is characterized in that the alarm module includes buzzer
And/or indicator light.
7. line loss fine-grained management device according to claim 2, which is characterized in that the wireless communication module includes:
One of GPRS module, 4G module, 3G module, gsm module or multiple combinations.
8. line loss fine-grained management device according to claim 1, which is characterized in that further include: peripheral interface module, institute
Stating Peripheral Interface includes one of 485 bus interface, USB interface, RS232 interface, RJ5 interface or multiple combinations；Wherein,
The peripheral interface module is used to external equipment being connected to the data processing module to realize Function Extension.
9. line loss fine-grained management device according to claim 1, which is characterized in that the data processing module also wraps
It includes: memory,
The memory be used to store the voltage value of the real-time collected electricity box front end, current value, electricity box rear end electricity
Parameter and the line loss data being calculated by the data processing module.
10. line loss fine-grained management device according to claim 1, which is characterized in that the data processing module includes
Master controller, wherein the master controller uses ARM series processors chip.
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| CN201821201924.8U CN208921783U (en) | 2018-07-26 | 2018-07-26 | Line loss fine-grained management device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108802488A (en) * | 2018-07-26 | 2018-11-13 | 广东电网有限责任公司 | Line loss fine-grained management device and method |
| CN110927480A (en) * | 2019-11-02 | 2020-03-27 | 国网上海市电力公司 | Low-voltage transformer area loss reduction method for HPLC application environment |
| CN111721987A (en) * | 2020-06-01 | 2020-09-29 | 王沛 | Electric power thing networking batch meter equipment based on thing allies oneself with perception technique |
-
2018
- 2018-07-26 CN CN201821201924.8U patent/CN208921783U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108802488A (en) * | 2018-07-26 | 2018-11-13 | 广东电网有限责任公司 | Line loss fine-grained management device and method |
| CN110927480A (en) * | 2019-11-02 | 2020-03-27 | 国网上海市电力公司 | Low-voltage transformer area loss reduction method for HPLC application environment |
| CN110927480B (en) * | 2019-11-02 | 2022-06-21 | 国网上海市电力公司 | Low-voltage transformer area loss reduction method for HPLC application environment |
| CN111721987A (en) * | 2020-06-01 | 2020-09-29 | 王沛 | Electric power thing networking batch meter equipment based on thing allies oneself with perception technique |
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