CN213402564U - Distribution network operation monitoring system based on edge calculation - Google Patents
Distribution network operation monitoring system based on edge calculation Download PDFInfo
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- CN213402564U CN213402564U CN202021498689.2U CN202021498689U CN213402564U CN 213402564 U CN213402564 U CN 213402564U CN 202021498689 U CN202021498689 U CN 202021498689U CN 213402564 U CN213402564 U CN 213402564U
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Abstract
The utility model relates to the technical field of power distribution network operation monitoring, and discloses a power distribution network operation monitoring system based on edge calculation, which comprises a monitoring background, an edge calculation unit and at least one monitoring terminal; the output of monitor terminal with the input of edge calculation unit is connected, the output of edge calculation unit with the input of control backstage is connected, the output of control backstage with an input of monitor terminal is connected, monitor terminal is distribution switch monitor terminal, data transmission unit, distribution transformer monitor terminal, fault indicator, environmental monitor or synchronous phasor measuring device. The utility model discloses monitor terminal to different monitoring position installations are reasonable to add and establish the edge calculation unit and carry out the analysis with the data to monitor terminal collection, monitor and report to the police to the distribution network more accurately rationally.
Description
Technical Field
The utility model relates to a distribution network operation monitoring technology field especially relates to a distribution network operation monitoring system based on edge calculation.
Background
At present, the main means of monitoring of distribution network running state is to install monitoring equipment at a distribution network main station and each position to give an alarm when the distribution network breaks down, but the following problems generally exist in the monitoring mode: the fault alarm starting element is unreasonable, most of the fault alarm starting elements adopt a mode of electric field sudden change starting or phase current disturbance, and the electric field sudden change starting mode is easily interfered by external factors (environment, climate and overhead line arrangement mode) and is frequently mistakenly operated or refused to be operated; the phase current disturbance mode is easily influenced by load fluctuation or motor starting and the like to carry out frequent misoperation; these problems make the alarm of power distribution network monitoring inaccurate and reasonable, and need to be improved.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a distribution network operation monitoring system based on edge calculation to the reasonable monitor terminal of different monitoring position installations to add and establish the edge calculation unit and carry out the analysis with the data to monitor terminal collection, monitor and report to the police to the distribution network more accurately rationally.
In order to achieve the above object, an embodiment of the present invention provides an operation monitoring system for a power distribution network based on edge calculation, which includes a monitoring background, an edge calculation unit and at least one monitoring terminal; the output of monitor terminal with the input of edge calculation unit is connected, the output of edge calculation unit with the input of control backstage is connected, the output of control backstage with an input of monitor terminal is connected, monitor terminal is distribution switch monitor terminal, data transmission unit, distribution transformer monitor terminal, fault indicator, environmental monitor or synchronous phasor measuring device.
Preferably, the power distribution switch monitoring terminal comprises a first data acquisition module, a first communication module, a first GPS time service module and a first micro control unit, and the first micro control unit is connected with the first data acquisition module, the first communication module and the first GPS time service module respectively; the first data acquisition module is used for acquiring power distribution switch state parameters, electric energy parameters and fault parameters of a power distribution system, and the first communication module is further in communication connection with the edge computing unit.
Preferably, the data transmission unit comprises a second data acquisition module, a second communication module, a second GPS time service module and a second micro control unit, and the second micro control unit is connected with the second data acquisition module, the second communication module and the second GPS time service module respectively; the second data acquisition module is used for acquiring data of serial devices in the power distribution system, and the second communication module is further in communication connection with the edge computing unit.
Preferably, the distribution transformer monitoring terminal comprises a third data acquisition module, a third communication module, a third GPS time service module and a third micro control unit, and the third micro control unit is connected with the third data acquisition module, the third communication module and the third GPS time service module respectively; the third data acquisition module is used for acquiring information of the distribution transformer, and the third communication module is also in communication connection with the edge calculation unit.
Preferably, the fault indicator includes a sensor, a display unit and a signal transmission unit, the sensor is respectively connected with the display unit and the signal transmission unit, and the signal transmission unit is further in communication connection with the edge calculation unit.
Preferably, the synchronous phasor measurement device is a micro synchronous phasor measurement device, the micro synchronous phasor measurement device comprises a fourth data acquisition module, a fourth communication module, a fourth GPS time service module and a fourth micro control unit, and the fourth micro control unit is respectively connected with the fourth data acquisition module, the fourth communication module and the fourth GPS time service module; the fourth data acquisition module is used for acquiring phasor information of a voltage phase and a current phase of the power distribution network, and the fourth communication module is further in communication connection with the edge calculation unit.
Compared with the prior art, the embodiment of the utility model provides a distribution network operation monitoring system based on edge calculation to the reasonable monitor terminal of different monitoring position installations to add and establish the edge calculation unit and carry out the analysis with the data to monitor terminal collection, monitor and report to the police the distribution network more accurately rationally.
Drawings
Fig. 1 is a schematic structural diagram of a power distribution network operation monitoring system based on edge calculation according to an embodiment of the present invention;
fig. 2 is a simplified schematic diagram of a work flow of a power distribution network operation monitoring system according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a monitoring terminal according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Referring to fig. 1, which is a schematic structural diagram of a power distribution network operation monitoring system based on edge calculation according to the embodiment of the present invention, as can be seen from fig. 1, the monitoring system includes a monitoring background, an edge calculation unit, and at least one monitoring terminal; the output of monitor terminal with the input of edge calculation unit is connected, the output of edge calculation unit with the input of control backstage is connected, the output of control backstage with an input of monitor terminal is connected, monitor terminal is distribution switch monitor terminal, data transmission unit, distribution transformer monitor terminal, fault indicator, environmental monitor or synchronous phasor measuring device.
Specifically, the power distribution network operation monitoring system based on edge calculation comprises a monitoring background, an edge calculation unit and at least one monitoring terminal; the output end of the monitoring terminal is connected with the input end of the edge computing unit, the output end of the edge computing unit is connected with the monitoring background, the output end of the monitoring background is connected with one input end of the monitoring terminal, the input end of the monitoring terminal is connected with the output end of the monitoring background to receive a control command issued by the monitoring background, and the other input ends of the monitoring terminal are used for collecting data. The edge computing unit is a data analysis module with an edge computing mode built in, can analyze the uploaded collected data, and sends an analysis result to the monitoring background for operation and maintenance personnel to check and issue a control instruction. The monitoring Terminal is a power distribution switch monitoring Terminal (FTU), a Data Transfer Unit (DTU), a distribution Transformer monitoring Terminal (TTU), a fault indicator, an environment monitor or a Phasor Measurement Unit (PMU). Generally, in order to monitor different areas of the power distribution network more comprehensively, the monitoring terminals can be of all types, namely, the power distribution network is provided with six monitoring terminals, namely, a power distribution switch monitoring terminal, a data transmission unit, a power distribution transformer monitoring terminal, a fault indicator, an environmental monitor and a synchronous phasor measurement device.
In order to understand the scheme of the present invention more clearly, the present embodiment of the present invention further provides a simplified schematic diagram of the work flow of the power distribution network operation monitoring system, specifically referring to fig. 2. As can be seen from fig. 2, each monitoring terminal acquires relevant data of the power distribution network in real time and transmits the data to the edge computing unit, and the edge computing unit performs fault point positioning and health state evaluation of the power distribution network by collecting and analyzing the data, and sends the analysis results to the monitoring background. In data collection, in order to ensure the integrity of data, the other output end of the edge computing unit is connected to the other input end of each monitoring terminal to send a recall command to recall data of the monitoring terminals which are not uploaded.
The utility model discloses this embodiment is through providing a distribution network operation monitoring system based on edge calculation, to the reasonable monitor terminal of different monitoring position installations to add and establish the edge calculation unit and carry out the analysis with the data to monitor terminal collection, monitor and report to the police to the distribution network more accurately rationally.
As an improvement of the above scheme, the power distribution switch monitoring terminal includes a first data acquisition module, a first communication module, a first GPS time service module, and a first micro control unit, where the first micro control unit is connected to the first data acquisition module, the first communication module, and the first GPS time service module, respectively; the first data acquisition module is used for acquiring power distribution switch state parameters, electric energy parameters and fault parameters of a power distribution system, and the first communication module is further in communication connection with the edge computing unit.
Specifically, the power distribution switch monitoring terminal FTU comprises a first data acquisition module, a first communication module, a first GPS time service module and a first micro control unit, wherein the first micro control unit is respectively connected with the first data acquisition module, the first communication module and the first GPS time service module; the first communication module is used for establishing communication connection with the edge calculation unit, sending the acquired data to the edge calculation unit and receiving a testing command issued by the edge calculation unit. Similarly, the first communication module is also connected with the monitoring background and is used for receiving the control instruction issued by the monitoring background. The first GPS time service module uses a Global Positioning System (GPS) second pulse as a synchronous clock, and can accurately time with other monitoring terminals, so that the fault positioning difficulty is greatly reduced.
As an improvement of the above scheme, the data transmission unit includes a second data acquisition module, a second communication module, a second GPS time service module and a second micro control unit, and the second micro control unit is connected to the second data acquisition module, the second communication module and the second GPS time service module respectively; the second data acquisition module is used for acquiring data of serial devices in the power distribution system, and the second communication module is further in communication connection with the edge computing unit.
Specifically, the data transmission unit DTU comprises a second data acquisition module, a second communication module, a second GPS time service module and a second micro control unit, wherein the second micro control unit is respectively connected with the second data acquisition module, the second communication module and the second GPS time service module; the second data acquisition module is used for acquiring data of serial port equipment in the power distribution system, and the second communication module is also in communication connection with the edge calculation unit, and is used for sending the acquired data to the edge calculation unit and receiving a test calling command issued by the edge calculation unit. Similarly, the second communication module is also connected with the monitoring background and is used for receiving the control instruction issued by the monitoring background. The second GPS time service module uses a Global Positioning System (GPS) second pulse as a synchronous clock, and can accurately time with other monitoring terminals, thereby greatly reducing the difficulty of fault location.
As an improvement of the above scheme, the distribution transformer monitoring terminal includes a third data acquisition module, a third communication module, a third GPS time service module, and a third micro control unit, where the third micro control unit is connected to the third data acquisition module, the third communication module, and the third GPS time service module, respectively; the third data acquisition module is used for acquiring information of the distribution transformer, and the third communication module is also in communication connection with the edge calculation unit.
Specifically, the distribution transformer monitoring terminal TTU includes a third data acquisition module, a third communication module, a third GPS time service module and a third micro control unit, and the third micro control unit is connected to the third data acquisition module, the third communication module and the third GPS time service module, respectively; the third data acquisition module is used for acquiring information of the distribution transformer, and the third communication module is also in communication connection with the edge calculation unit, and is used for sending the acquired data of the distribution transformer to the edge calculation unit and receiving a testing calling command issued by the edge calculation unit. Similarly, the third communication module is also connected with the monitoring background and is used for receiving the control instruction issued by the monitoring background. The third GPS time service module uses the second pulse of the Global Positioning System (GPS) as the synchronous clock, and can accurately time with other monitoring terminals, thereby greatly reducing the difficulty of fault location.
As an improvement of the above scheme, the fault indicator includes a sensor, a display unit and a signal transmission unit, the sensor is respectively connected with the display unit and the signal transmission unit, and the signal transmission unit is further in communication connection with the edge calculation unit.
Specifically, the fault indicator comprises a sensor, a display unit and a signal transmission unit, wherein the sensor is respectively connected with the display unit and the signal transmission unit, and the signal transmission unit is also in communication connection with the edge calculation unit. Generally, the fault indicator is installed on a power line, and includes an overhead line, a cable, and a busbar. Once the line is in fault and short-circuit current flows, the fault indicator acts and the fault sign red plate appears.
As an improvement of the above scheme, the synchronized phasor measurement apparatus is a micro synchronized phasor measurement apparatus, the micro synchronized phasor measurement apparatus includes a fourth data acquisition module, a fourth communication module, a fourth GPS time service module and a fourth micro control unit, and the fourth micro control unit is connected to the fourth data acquisition module, the fourth communication module and the fourth GPS time service module respectively; the fourth data acquisition module is used for acquiring phasor information of a voltage phase and a current phase of the power distribution network, and the fourth communication module is further in communication connection with the edge calculation unit.
Specifically, the synchronous phasor measurement unit PMU is a micro synchronous phasor measurement unit PMU, the micro synchronous phasor measurement unit PMU comprises a fourth data acquisition module, a fourth communication module, a fourth GPS time service module and a fourth micro control unit, and the fourth micro control unit is connected with the fourth data acquisition module, the fourth communication module and the fourth GPS time service module respectively; the fourth data acquisition module is used for acquiring phasor information of a voltage phase and a current phase of the power distribution network, and the fourth communication module is also in communication connection with the edge calculation unit, is used for sending the acquired phasor information to the edge calculation unit, and receives a summoning command issued by the edge calculation unit. Similarly, the third communication module is also connected with the monitoring background and is used for receiving the control instruction issued by the monitoring background. The third GPS time service module uses the second pulse of the Global Positioning System (GPS) as the synchronous clock, and can accurately time with other monitoring terminals, thereby greatly reducing the difficulty of fault location.
Referring to fig. 3, it is a schematic structural diagram of a monitoring terminal provided in this embodiment of the present invention. As can be seen from FIG. 3, each monitoring terminal includes a power supply circuit, an acquisition circuit, a data storage module, a communication module, an MCU module, and a GPS time service module, and the GPS time service module is provided, so that high-precision time service of each monitoring terminal can be realized, and system state evaluation and fault point positioning are facilitated.
In order to deepen the utility model discloses an understand, the utility model discloses this embodiment still explains distribution network operation monitoring system's work flow, and is detailed as follows:
when the system normally operates, the monitoring terminal monitors voltage, current and environmental data at any time, wherein voltage abnormality generally means that a zero-sequence voltage instantaneous value, a zero-sequence voltage effective value or a zero-sequence voltage abrupt change exceeds a limit value and is used for indicating that a power distribution network system has a ground fault; the current abnormity generally refers to that the instantaneous value, the effective value or the abrupt change of the current of each line current amplitude exceeds a limit value, and is used for indicating that the system has an interphase short circuit fault.
When the monitoring terminal identifies that voltage abnormality and current abnormality occur, the monitoring terminal identifies the time point of the abnormality occurrence and transmits fault time information and a data file with a fault waveform to the edge calculation unit.
And after receiving the wave recording data, the edge computing unit waits for a period of time, performs data integrity verification, starts a test calling function when the data is incomplete, and performs data test on the monitoring terminal which does not upload the data. After the integrity of the data is met, the edge computing unit can position the fault point, and the main positioning principle is that a waveform similarity principle is utilized, namely the current waveforms at the upstream of the fault point are similar, the waveforms at the downstream of the fault point are dissimilar, and the data of each point are accurately timed through a GPS signal, so that the fault positioning difficulty is greatly reduced; after the fault location is finished, wavelet decomposition is carried out on the wave recording data of the fault point, the wave recording data are decomposed into different elements, and the type of the fault is identified by utilizing the time-frequency characteristics of the elements. The specific identification method comprises the following steps:
and a, judging single-phase faults, interphase short circuits and three-phase short circuits.
b for interphase short-circuiting. And distinguishing the interphase short circuit caused by the tree line collision and the vehicle line collision by utilizing the fault current component. When the fault current component is larger than the preset current amplitude, the tree line-touching fault can be judged.
c short circuit for three phases. And distinguishing three-phase short circuit faults caused by lightning stroke and tree voltage by using the attenuation degree of the fault current, and judging that the tree voltage disconnection fault exists when the attenuation degree of the fault current is greater than a certain limit value.
d for single phase faults. Firstly, distinguishing faults caused by animals from other types by using fault duration time, and judging the faults caused by the animals when the fault duration time is greater than a limit value; secondly, distinguishing the internal fault of the equipment from the fault caused by the external environment by using the amplitude of the arc voltage, and judging that the internal fault of the equipment occurs when the arc voltage is lower; and finally, distinguishing single-phase earth faults caused by tree line collision and vehicles by using frequency domain energy distribution.
The edge computing unit feeds back the identified fault type and fault point information to the monitoring background for monitoring by the power supply network operation and maintenance personnel, and performs statistical analysis on the operation condition. When the active scheduling of the power grid is needed, the specific switch is remotely controlled.
The power distribution network operation monitoring system based on edge calculation integrates main analysis and calculation functions of the operation of the transformer substation into an edge calculation unit, so that the data bandwidth required by data remote transmission can be greatly reduced, and the reliability of the system operation is improved. The edge computing unit is arranged nearby, and can conveniently collect various types of terminal data, synchronize terminal time and the like by utilizing various communication means such as short-distance wireless communication, far-end wireless communication, LAN (local area network), optical fiber communication, serial port communication and the like.
To sum up, the embodiment of the utility model provides a distribution network operation monitoring system based on edge calculation to the reasonable monitor terminal of different monitoring position installations to add and establish the edge calculation unit and carry out the analysis with the data to monitor terminal collection, monitor and report to the police the distribution network more accurately rationally. Meanwhile, each monitoring terminal is provided with a GPS time service module, so that high-precision time service of each monitoring terminal can be realized, and system state evaluation and fault point positioning are facilitated. Moreover, the edge calculation unit can carry out integrity check on the monitoring data, so that data analysis can be carried out through the complete monitoring data, and the monitoring analysis is more accurate.
The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations are also considered as the protection scope of the present invention.
Claims (6)
1. A power distribution network operation monitoring system based on edge calculation is characterized by comprising a monitoring background, an edge calculation unit and at least one monitoring terminal; the output of monitor terminal with the input of edge calculation unit is connected, the output of edge calculation unit with the input of control backstage is connected, the output of control backstage with an input of monitor terminal is connected, monitor terminal is distribution switch monitor terminal, data transmission unit, distribution transformer monitor terminal, fault indicator, environmental monitor or synchronous phasor measuring device.
2. The system for monitoring the operation of the power distribution network based on the edge computing as claimed in claim 1, wherein the power distribution switch monitoring terminal comprises a first data acquisition module, a first communication module, a first GPS time service module and a first micro control unit, and the first micro control unit is respectively connected with the first data acquisition module, the first communication module and the first GPS time service module; the first data acquisition module is used for acquiring power distribution switch state parameters, electric energy parameters and fault parameters of a power distribution system, and the first communication module is further in communication connection with the edge computing unit.
3. The system for monitoring the operation of the power distribution network based on the edge computing as claimed in claim 1, wherein the data transmission unit comprises a second data acquisition module, a second communication module, a second GPS time service module and a second micro control unit, and the second micro control unit is respectively connected with the second data acquisition module, the second communication module and the second GPS time service module; the second data acquisition module is used for acquiring data of serial devices in the power distribution system, and the second communication module is further in communication connection with the edge computing unit.
4. The system for monitoring the operation of the power distribution network based on the edge computing as claimed in claim 1, wherein the power distribution transformer monitoring terminal comprises a third data acquisition module, a third communication module, a third GPS time service module and a third micro control unit, and the third micro control unit is respectively connected with the third data acquisition module, the third communication module and the third GPS time service module; the third data acquisition module is used for acquiring information of the distribution transformer, and the third communication module is also in communication connection with the edge calculation unit.
5. The system according to claim 1, wherein the fault indicator comprises a sensor, a display unit and a signal transmission unit, the sensor is connected to the display unit and the signal transmission unit, and the signal transmission unit is further connected to the edge calculation unit in a communication manner.
6. The system according to claim 1, wherein the synchronous phasor measurement device is a micro synchronous phasor measurement device, the micro synchronous phasor measurement device includes a fourth data acquisition module, a fourth communication module, a fourth GPS time service module, and a fourth micro control unit, and the fourth micro control unit is connected to the fourth data acquisition module, the fourth communication module, and the fourth GPS time service module, respectively; the fourth data acquisition module is used for acquiring phasor information of a voltage phase and a current phase of the power distribution network, and the fourth communication module is further in communication connection with the edge calculation unit.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115308528A (en) * | 2022-08-05 | 2022-11-08 | 中宝电气有限公司 | Intelligent feeder terminal capable of accurately positioning single-phase earth fault based on Internet of things technology |
| CN115912662A (en) * | 2023-03-09 | 2023-04-04 | 广东正超电气有限公司 | Edge calculating device for medium-voltage cabinet |
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2020
- 2020-07-23 CN CN202021498689.2U patent/CN213402564U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115308528A (en) * | 2022-08-05 | 2022-11-08 | 中宝电气有限公司 | Intelligent feeder terminal capable of accurately positioning single-phase earth fault based on Internet of things technology |
| CN115308528B (en) * | 2022-08-05 | 2023-09-22 | 中宝电气有限公司 | Intelligent feeder terminal for accurately positioning single-phase ground fault based on Internet of things technology |
| CN115912662A (en) * | 2023-03-09 | 2023-04-04 | 广东正超电气有限公司 | Edge calculating device for medium-voltage cabinet |
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