CN104485742A - Power terminal in wireless power private network and management method of power terminal - Google Patents
Power terminal in wireless power private network and management method of power terminal Download PDFInfo
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- CN104485742A CN104485742A CN201410773430.7A CN201410773430A CN104485742A CN 104485742 A CN104485742 A CN 104485742A CN 201410773430 A CN201410773430 A CN 201410773430A CN 104485742 A CN104485742 A CN 104485742A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/126—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wireless data transmission
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Abstract
The invention discloses a power terminal in a wireless power private network. The power terminal is characterized by comprising a power distribution transformer, a data acquisition module, a data processing module and a wireless communication module which are connected in sequence, wherein the data processing module is further connected with a local storage module; the data acquisition module is used for acquiring the power parameters of the power distribution transformer in real time, and used for transmitting the power parameters to the data processing module; the data processing module is used for sampling and analyzing the power parameters at regular time, and used for transmitting the sampled data to the local storage module to store; if the data are abnormal, alarm information is transmitted to a monitoring center through the wireless communication module.
Description
Technical field
The present invention relates to electric power networks field, refer to the electric power terminal in wireless power private network and management method thereof especially.
Background technology
The intension of intelligent grid is based on strong rack, with communication information platform for supporting, take Based Intelligent Control as means, realize the function of electric power system from the Intellisense of generating, transmission of electricity, power transformation, distribution, electricity consumption and scheduling links, Intelligent Recognition, Based Intelligent Control, the very high integrity realizing " flow of power, information flow, Business Stream " merges.Each user in intelligent grid and node are monitored in real time, will be formed network interdynamic and immediately be connected between user, between user and grid company by electric terminal, realize digital independent real-time, at a high speed, two-way general effect.Intelligent grid can data in integration system, optimize the management of electrical network, electrical network are promoted to the new mode of interactive running, improve the reliability of whole electrical network, availability and overall efficiency.
Electric power terminal is particularly important as the elementary cell of intelligent grid; Electric power terminal is the general designation for the electric power checkout gear being arranged on user power utilization facility place, in intelligent grid, electric power terminal demand fulfillment transmits in real time, efficiently for power information, independently can process power failure to a certain degree, and the distribution to electric power resource can be completed under the control of remote monitoring center.
Just because of the critical role of electric power terminal in intelligent grid, therefore need a kind of intelligence, electric power terminal device, and the management method supporting with it reliably, meet the demand of the smart electric grid system based on information platform and platform of internet of things.
Summary of the invention
In view of this, the object of the invention is to propose the electric power terminal in a kind of wireless power private network and management method thereof, to meet the demand of smart electric grid system.
Based on the electric power terminal in above-mentioned purpose radio net provided by the invention, comprise the distribution transformer, data acquisition module, data processing module and the wireless communication module that connect successively, described data processing module is also connected to local memory module; The parameters of electric power of distribution transformer described in described data acquisition module Real-time Collection, and be sent to described data processing module; Parameters of electric power is carried out sampling and analyzing by data processing module timing, and the data obtained sampling are sent to local memory module and store, if data exception, then send warning message by GPRS module to monitoring center.
Optionally, described data acquisition module comprises current transformer, voltage transformer, front end signal processor and low pass filter; Described current transformer and voltage transformer are connected to described limit, distribution transformer source and secondary and gather its parameters of electric power; Described front end signal processor is connected to described current transformer and voltage transformer, and processes the parameters of electric power that the two collects; Parameters of electric power is by being transferred to data processing module after described low pass filter.
Optionally, described front end signal processor comprises voltage acquisition front-end processing circuit and current acquisition front-end processing circuit; Wherein, described voltage acquisition front-end processing circuit is used for high voltage signal scaling transformation and carries out direct current biasing to it, with Matched measurement voltage; It is voltage signal that described current acquisition front-end processing circuit is used for current conversion, and carries out direct current biasing and anti-phase conversion to it, makes it meet the analog-to-digital conversion scope of described data processing module.
Optionally, described low pass filter adopts Butterworth second-order low-pass filter.
Optionally, described data processing module comprises the mixed-signal system level single-chip microcomputer be integrated on chip, can realize data acquisition and Control on Communication.
Optionally, described wireless communication module is LTE 4G/WSN/UWB/GPRS communication module.
Present invention also offers the management method of the electric power terminal in radio net based on above-mentioned purpose, comprise the steps:
Step 1, periodically obtains the parameters of electric power of electric power terminal, monitors parameters of electric power, stores, and is regularly sent the relevant information of electric power terminal to monitoring center by wireless communication module; If find, parameters of electric power is abnormal, then skip to step 2, otherwise repeats step 1;
Step 2, sends warning message by wireless communication module to monitoring center;
Optionally, the information model of the relevant information of described electric power terminal is layer structure, and the encryption of each layer information can be accepted or rejected as required with transmission; Wherein, information model is followed successively by top layer from bottom:
Essential information, regularly sends, and comprises plant capacity, device id and device type etc.;
Extend information, for power scheduling, comprises electricity consumption request, estimates duration and urgency level etc.;
High-level information, for replying inquiry request, comprises operation conditions, energy source and rate situation etc.;
Additional information, for strengthening information reliability, comprises enciphered message, check information and specific information.
Optionally, Surveillance center, according to situation about monitoring electric power terminal, carries out control operation to electric power terminal or sends data upload requests; Namely set up the Transmission Control Protocol between Surveillance center and the wireless communication module of electric power terminal, send control command or data upload requests order to wireless communication module;
Wherein, the step of Surveillance center's reception wireless communication module uploading data comprises:
S1, judges whether to establish the Transmission Control Protocol between this Surveillance center and wireless communication module, if then skip to S2, the Transmission Control Protocol then arranged between Surveillance center and wireless communication module performs S2 more if not;
S2, starts socket and intercepts;
S3, judges whether the connection request from wireless communication module, if then accepting to connect performs S5, then turns back to S2 if not;
S4, according to described connection request, Surveillance center receives data.
As can be seen from above, the invention provides the electric power terminal in a kind of radio net and management method thereof, by the parameters of electric power of data collecting module collected electric power terminal, parameters of electric power is stored to after data processing module process in local memory module and also periodically relevant information is sent to Surveillance center by wireless communication module; Control command is sent it back electric power terminal after processing described information by Surveillance center; Detecting that parameters of electric power occurs extremely, data processing module initiatively sends warning message to Surveillance center.Visible, electric power terminal provided by the invention can realize combining closely of electrical network and communication network, meets the construction requirements of intelligent grid.
Accompanying drawing explanation
Fig. 1 is the structural representation of embodiment of the present invention electric power terminal;
Fig. 2 is the structural representation of embodiment of the present invention data acquisition module;
Fig. 3 is the electrical block diagram of embodiment of the present invention distribution transformer;
Fig. 4 is embodiment of the present invention voltage acquisition front-end processing circuit structural representation;
Fig. 5 is embodiment of the present invention current acquisition front-end processing circuit structural representation;
Fig. 6 is the electrical block diagram of embodiment of the present invention low pass filter;
Fig. 7 is the amplitude-frequency characteristic figure of embodiment of the present invention low pass filter;
Embodiment
For making the object, technical solutions and advantages of the present invention clearly understand, below in conjunction with specific embodiment, and with reference to accompanying drawing, the present invention is described in more detail.
Fig. 1 is the structural representation of embodiment of the present invention electric power terminal; As shown in the figure, electric power terminal provided by the invention comprises the distribution transformer 1, data acquisition module 2, data processing module 3 and the wireless communication module 5 that connect successively, and described data processing module is also connected to local memory module 4; The parameters of electric power of distribution transformer 1 described in described data acquisition module 2 Real-time Collection, and be sent to described data processing module 3; Parameters of electric power is carried out sampling and analyzing by data processing module 3 timing, and the data obtained sampling are sent to local memory module 4 and store, if data exception, then sends warning message by wireless communication module 5 to monitoring center; In some embodiment, self associate power data is regularly sent to monitoring center by wireless communication module 5 by electric power terminal, and the distribution of control command to electric power resource that can receive monitoring center adjusts.
Above-mentioned wireless communication module is LTE 4G/WSN/UWB/GPRS communication module, can need to select according to concrete engineering.
Fig. 2 is the structural representation of embodiment of the present invention data acquisition module; As shown in the figure, described data acquisition module 2 comprises current transformer 203, voltage transformer 201, front end signal processor 205 and low pass filter 207; Described current transformer 203 and voltage transformer 201 are connected to described limit, distribution transformer 1 source and secondary and gather its parameters of electric power; Described front end signal processor 205 is connected to described current transformer 203 and voltage transformer 201, and processes the parameters of electric power that the two collects; Parameters of electric power is by being transferred to data processing module 3 after described low pass filter 207.
Optionally, described front end signal processor comprises voltage acquisition front-end processing circuit and current acquisition front-end processing circuit; Wherein, described voltage acquisition front-end processing circuit is used for high voltage signal scaling transformation and carries out direct current biasing to it, with Matched measurement voltage; It is voltage signal that described current acquisition front-end processing circuit is used for current conversion, and carries out direct current biasing and anti-phase conversion to it, makes it meet the analog-to-digital conversion scope of described data processing module.
Fig. 3 is the electrical block diagram of embodiment of the present invention distribution transformer; As shown in the figure, described distribution transformer comprises limit, source and secondary, exportable three-phase voltage.
Preferably, collection monitoring is carried out by the three-phase voltage of current transformer 203, voltage transformer 201 pairs of limits, distribution transformer 1 source and secondary, current electrical parameter.Meanwhile, analytic record image data, and when there is anomalous event in Three-Phase Transformer parameters of electric power active upload warning information.Preferably, adopt MG8 type current transformer, when measuring distribution transformer 301 current signal at the scene, directly can be accessed distribution transformer output, compare traditional zero sequence current mutual inductor and seem convenient and quick in installation and operation, performance index are as follows: no-load voltage ratio: 2500:1, measuring range: 0-20A, certainty of measurement grade: 0.1 grade, working temperature :-40 DEG C to+80 DEG C.Preferably, adopt TR1102-C type voltage transformer, this instrument transformer voltage is direct input and output, have the advantages that peripheral circuit is simple, the linearity good and certainty of measurement is high, can meet work on the spot environmental requirement, performance index are as follows: nominal input voltage: 0-380V, and secondary exports: 0-0.7V, accuracy class: 0.1 grade, working temperature :-25 DEG C to+75 DEG C.
In one embodiment of the invention, front end signal processor 205 comprises voltage acquisition front-end processing circuit and current acquisition front-end processing circuit.Wherein, voltage acquisition front-end processing circuit major function is by high voltage signal scaling transformation and carries out direct current biasing to it, with Matched measurement voltage.This part contains voltage conversion circuit, DC bias circuit and negative circuit, as shown in Figure 4: resistance R50 with R51 is connected with the two ends of voltage transformer pt respectively.Resistance R48 and R50 parallel connection access the negative input of operational amplifier OP07C afterwards, resistance R51 one end ground connection, and the electrode input end of other end access operational amplifier OP07C, is linked into the output of operational amplifier OP07C after resistance R48 series resistance R49.In addition, the output of the described operational amplifier OP07C resistance R52 that connects accesses the negative input of another operational amplifier OP07C, and the output of another operational amplifier of R52 series resistance R53 and this OP07C is connected.Resistance R54 one end ground connection, the other end accesses the electrode input end of this another operational amplifier OP07C.
Further, because the input voltage of the inner integrated A/D converter of data processing module 3 is 0-3.3V, so the DC offset voltage of signal selects its median 1.5V, the calculation relational expression of circuit parameter is as follows:
In an embodiment, R50 is chosen as 10K, only needs to do level lifting, so R49 also gets 10K to the voltage signal after conversion.Positive voltage signal U1 gets 5V, and after amplifier twice is anti-phase, becoming positive voltage superposition in the signal, is 33.3K by can be calculated R48 resistance value.Operational amplifier OP07C has good stability, accesses 20k potentiometer and can eliminate self-oscillation between the 1st pin and the 8th pin.
In addition, current acquisition front-end processing circuit is voltage signal by current conversion, and carry out direct current biasing and anti-phase conversion to it, makes its satisfied this locality focus on the analog-to-digital conversion scope of device 103.Current conversion is voltage by accurate multiturn potentiometer by the current signal of distribution transformer 301 after current transformer 302 exports, its amplitude size regulates by potentiometer, DC bias circuit principle is identical with voltage acquisition front-end processing circuit with negative circuit principle, as shown in Figure 5.
Preferably, the effect of low pass filter 207 is HFSs of filtered signal, prevents signal aliasing and interference.Preferably, adopt Butterworth second-order low-pass filter, be characterized in that the frequency response curve in passband is smooth to greatest extent, be then drop to zero gradually at suppressed frequency band, circuit as shown in Figure 6.Wherein, the electrode input end of access operational amplifier OP07C after resistance R48 and R50 connects, the negative input of operational amplifier OP07C is connected with the output of this operational amplifier OP07C simultaneously.Electric capacity C48 one end ground connection, the other end is connected with resistance R50, and this end and electric capacity C49 connect and to be connected with the output of operational amplifier OP07C.
The amplitude-frequency characteristic of low pass filter 207 as shown in Figure 7, this diagram depicts the corresponding relation between filter input signal frequency and attenuated output signal amplitude, can find out that the signal being greater than 1kHz is decayed gradually along fixed slope.Be no more than 750Hz because gathered harmonic current frequency is maximum, the cut-off frequency of low pass filter 1kHz can not have influence on harmonic current measurement.Each A/D ALT-CH alternate channel have employed identical filter circuit, so the phase deviation caused by filter is very little, can not affect the measurement of harmonic current.
In addition, the invention provides the management method of the electric power terminal in a kind of radio net, it is characterized in that, comprise the steps:
Step 1, periodically obtains the parameters of electric power of electric power terminal, monitors parameters of electric power, stores, and is regularly sent the relevant information of electric power terminal to monitoring center by wireless communication module; If find, parameters of electric power is abnormal, then skip to step 2, otherwise repeats step 1;
Step 2, sends warning message by wireless communication module to monitoring center.
Above step achieves the process that electric power terminal Intelligent Measurement is abnormal and report to the police, the construction object of intelligent grid, be by end sensor between client, form the instant network interdynamic connected between client and grid company, realize digital independent real-time, at a high speed, two-way effect, thus the overall overall efficiency improving electrical network.Intelligent grid realizes flow of power, information flow, the highly integrated prerequisite of Business Stream, be the Real-time Collection of information, transmit safely and fast, accurately identify, rationally apply, finally realize generating, transmission of electricity, distribution, the Based Intelligent Control of electricity consumption, intelligent scheduling, intelligent management.
In order to meet the demand, in the communication information model construction that the invention provides the electric power terminal in wireless power private network, the devices interconnect mechanism of plug and play must be realized, bond networking architecture and protocol specification, set up the data model that power information transmits and equipment room is interconnected, realize the perception of equipment, identity verify and control, the protocol analysis specification in define equipment message transmitting procedure.In an embodiment, the information model of electric power terminal is as shown in table 1:
Table 1 electric power terminal information model
Visible, the information model of electric power terminal has typical layer structure, and the encryption of each layer information can be accepted or rejected as required with transmission.Wherein, the bottom is essential information, and this is a kind of broadcast message, receive by all devices within the scope of Internet of Things and perception.This part information will timed sending, is also the basis that each equipment realizes plug and play.Meanwhile, each equipment also receives the broadcast message of miscellaneous equipment, and understanding the basal conditions of all " online " equipment, namely can be plant capacity, the ID of equipment and the type of equipment etc.The second layer is extend information, is mainly used in electricity consumption request, may derive from user operation or Based Intelligent Control, needs to provide request signal, and scheduled time length and request rank, for scheduler program analyzing and processing.Third layer is high-level information, is generally response message, derives from miscellaneous equipment, especially the inquiry request of management of power use equipment, and this equipment responds, and sends the information such as current operating conditions, energy source, in real time rate.In addition, be also provided with additional information layer, except this equipment sends to the specific information of special equipment, be mainly used in application layer encryption and the verification of information, strengthen the reliability of information transmission.
Optionally, Surveillance center, according to situation about monitoring electric power terminal, carries out control operation to electric power terminal or sends data upload requests; Namely set up the Transmission Control Protocol between Surveillance center and the wireless communication module of electric power terminal, send control command or data upload requests order to wireless communication module;
Wherein, the step of Surveillance center's reception wireless communication module uploading data comprises:
S1, judges whether to establish the Transmission Control Protocol between this Surveillance center and wireless communication module, if then skip to S2, the Transmission Control Protocol then arranged between Surveillance center and wireless communication module performs S2 more if not;
S2, starts socket and intercepts;
S3, judges whether the connection request from wireless communication module, if then accepting to connect performs S5, then turns back to S2 if not;
S4, according to described connection request, Surveillance center receives data.
By above process, electric power terminal by receiving the connection request of Surveillance center, can also send corresponding data.
Those of ordinary skill in the field are to be understood that: the foregoing is only specific embodiments of the invention; be not limited to the present invention; within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. the electric power terminal in radio net, is characterized in that, comprise the distribution transformer, data acquisition module, data processing module and the wireless communication module that connect successively, described data processing module is also connected to local memory module; The parameters of electric power of distribution transformer described in described data acquisition module Real-time Collection, and be sent to described data processing module; Parameters of electric power is carried out sampling and analyzing by data processing module timing, and the data obtained sampling are sent to local memory module and store, if data exception, then send warning message by wireless communication module to monitoring center.
2. the electric power terminal in radio net according to claim 1, is characterized in that, described data acquisition module comprises current transformer, voltage transformer, front end signal processor and low pass filter; Described current transformer and voltage transformer are connected to described limit, distribution transformer source and secondary and gather its parameters of electric power; Described front end signal processor is connected to described current transformer and voltage transformer, and processes the parameters of electric power that the two collects; Parameters of electric power is by being transferred to data processing module after described low pass filter.
3. the electric power terminal in radio net according to claim 2, is characterized in that, described front end signal processor comprises voltage acquisition front-end processing circuit and current acquisition front-end processing circuit; Wherein, described voltage acquisition front-end processing circuit is used for high voltage signal scaling transformation and carries out direct current biasing to it, with Matched measurement voltage; It is voltage signal that described current acquisition front-end processing circuit is used for current conversion, and carries out direct current biasing and anti-phase conversion to it, makes it meet the analog-to-digital conversion scope of described data processing module.
4. the electric power terminal in radio net according to claim 2, is characterized in that, described low pass filter adopts Butterworth second-order low-pass filter.
5. the electric power terminal in radio net according to claim 1, is characterized in that, described data processing module comprises the mixed-signal system level single-chip microcomputer be integrated on chip, can realize data acquisition and Control on Communication.
6. the electric power terminal in radio net according to claim 1, is characterized in that, described wireless communication module is LTE 4G/WSN/UWB/GPRS communication module.
7. a management method for the electric power terminal in radio net, is characterized in that, comprises the steps:
Step 1, periodically obtains the parameters of electric power of electric power terminal, monitors parameters of electric power, stores, and is regularly sent the relevant information of electric power terminal to monitoring center by wireless communication module; If find, parameters of electric power is abnormal, then skip to step 2, otherwise repeats step 1;
Step 2, sends warning message by wireless communication module to monitoring center.
8. the management method of the electric power terminal in radio net according to claim 7, is characterized in that, the information model of the relevant information of described electric power terminal is layer structure, and the encryption of each layer information can be accepted or rejected as required with transmission; Wherein, information model is followed successively by top layer from bottom:
Essential information, regularly sends, and comprises plant capacity, device id and device type etc.;
Extend information, for power scheduling, comprises electricity consumption request, estimates duration and urgency level etc.;
High-level information, for replying inquiry request, comprises operation conditions, energy source and rate situation etc.;
Additional information, for strengthening information reliability, comprises enciphered message, check information and specific information.
9. the management method of the electric power terminal in radio net according to claim 7, is characterized in that, Surveillance center, according to situation about monitoring electric power terminal, carries out control operation to electric power terminal or sends data upload requests; Namely set up the Transmission Control Protocol between Surveillance center and the wireless communication module of electric power terminal, send control command or data upload requests order to wireless communication module;
Wherein, the step of Surveillance center's reception wireless communication module uploading data comprises:
S1, judges whether to establish the Transmission Control Protocol between this Surveillance center and wireless communication module, if then skip to S2, the Transmission Control Protocol then arranged between Surveillance center and wireless communication module performs S2 more if not;
S2, starts socket and intercepts;
S3, judges whether the connection request from wireless communication module, if then accepting to connect performs S5, then turns back to S2 if not;
S4, according to described connection request, Surveillance center receives data.
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| CN111769641A (en) * | 2020-06-29 | 2020-10-13 | 水木源华电气有限公司 | Intelligent terminal of power distribution internet of things |
| CN112953017A (en) * | 2021-03-29 | 2021-06-11 | 国网新疆电力有限公司阿克苏供电公司 | Comprehensive linkage monitoring device and method for distributed power distribution equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108107299A (en) * | 2018-02-09 | 2018-06-01 | 衢州学院 | A kind of micro-capacitance sensor small-signal stability analysis and parameter coordination adjusting system |
| CN108900614A (en) * | 2018-07-02 | 2018-11-27 | 国网山东省电力公司金乡县供电公司 | A kind of communicating for power information system with dynamic storing |
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| CN112953017A (en) * | 2021-03-29 | 2021-06-11 | 国网新疆电力有限公司阿克苏供电公司 | Comprehensive linkage monitoring device and method for distributed power distribution equipment |
| CN117118064A (en) * | 2023-07-31 | 2023-11-24 | 国网天津市电力公司滨海供电分公司 | Remote signal monitoring and automatic control system for power system |
| CN118054566A (en) * | 2024-03-19 | 2024-05-17 | 上海华建电力设备股份有限公司 | Electric power monitoring equipment |
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