CN210954207U - Platform district branch recognition device - Google Patents
Platform district branch recognition device Download PDFInfo
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- CN210954207U CN210954207U CN201921761683.7U CN201921761683U CN210954207U CN 210954207 U CN210954207 U CN 210954207U CN 201921761683 U CN201921761683 U CN 201921761683U CN 210954207 U CN210954207 U CN 210954207U
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Abstract
The utility model relates to the technical field of electric power system detection devices, in particular to a platform zone branch identification device, which comprises a concentrator and an acquisition terminal, wherein the concentrator is used for sending messages to the acquisition terminal and receiving detection results sent by the acquisition terminal, and comprises a first controller and a first communication module; the acquisition terminal comprises a second controller, a disturbance current generation module, a second communication module, a disturbance current detection module and a clock module, wherein the disturbance current generation module, the second communication module, the disturbance current detection module and the clock module are all electrically connected with the second controller, the second controller is used for receiving messages sent by the concentrator and setting the timing time of the clock module according to the messages, and the second controller is used for controlling the disturbance current generation module to generate and send a disturbance current signal and controlling the disturbance current detection module to detect the disturbance current signal after the clock module reaches the timing time. The utility model provides a pair of platform district branch recognition device can be stable, accurate, quick realization platform district branch's discernment, avoids causing the influence to electric wire netting equipment.
Description
Technical Field
The utility model relates to an electric power system detection device technical field specifically is a platform district branch recognition device.
Background
Electric energy always occupies a great position in an energy pattern, and the intellectualization and informatization of a power grid system are crucial to further playing the role of the electric energy and effectively utilizing the electric energy. However, there are many problems to be solved in the process of intellectualization and informatization, wherein the topological structure of the power grid (especially the low-voltage platform area) is always a difficult problem which troubles the rapid development of the power grid. In order to use electricity quickly and conveniently, low-voltage distribution area users can wire the electricity quite randomly without wiring according to the regulations of relevant departments, and even some users have two service lines in different distribution areas, so that the actual electricity consumption of the users and the data of the branch summary table have large access. Secondly, due to the existence of various random connection and random connection, great potential safety hazards are brought to the personal safety of power maintenance personnel to a certain extent. Therefore, in order to realize consumption reduction and loss reduction by the power consumption management department, the whole topological structure of the transformer area needs to be accurately and dynamically known, so that the refined and accurate comprehensive management of the transformer area is realized.
To accurately describe the topology of a low-voltage station area, firstly, it needs to be determined whether a certain system node belongs to a certain target station area, and if so, which phase the node belongs to. Secondly, after determining all nodes of a certain target station area and corresponding phase power, further determining topological relations among all system nodes is needed. The traditional station zone branch identification system adopts a power line carrier bidirectional communication mode, and has the advantages that the existing network can be directly utilized without upgrading the system, and the operation is simple and convenient. First, the power communication system is very complex, the noise and line impedance of the system are different in different periods, and the attenuation of the carrier signal is uneven, so that the long-distance transmission cannot be stably performed. Secondly, because the high-frequency carrier signals are mostly adopted in power line carrier communication, the high-frequency carrier signals are coupled to the high-voltage side through a distribution transformer and then transmitted to adjacent distribution transformers through high-voltage lines, the accuracy problem exists in the identification of the distribution transformer areas of a plurality of adjacent distribution transformers in a common-high-voltage, common-ground and common-cable trench. The other scheme is to adopt a specific large pulse current mode to identify the station zone branches, and certainly, the scheme does not have the problem of line stringing any more and can improve the accuracy problem of station zone identification to a certain extent. However, the greatest disadvantage is that the long-term short-term large current can cause damage to equipment and systems, thereby increasing the burden and cost of the systems invisibly and being irrevocable. In view of the above, how to consider the stability of the system equipment and the accuracy of the station zone branch identification is a difficult problem.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a platform district branch recognition device can avoid causing the influence to electric wire netting equipment in platform district testing process.
In order to solve the technical problem, the present application provides the following technical solutions:
a station branch identifying apparatus comprising: the concentrator comprises a first controller and a first communication module electrically connected with the first controller, wherein the first controller is used for controlling the first communication module to send messages to the acquisition terminal, and the first controller is also used for controlling the first communication module to receive detection results sent by the acquisition terminal;
the acquisition terminal comprises a second controller, a disturbance current generation module, a second communication module, a disturbance current detection module and a clock module, wherein the disturbance current generation module, the second communication module, the disturbance current detection module and the clock module are all electrically connected with the second controller, the second controller is used for controlling the second communication module to receive messages sent by the concentrator and setting the timing time of the clock module according to the messages, the second controller is used for controlling the disturbance current generation module to generate and send disturbance current signals after the clock module times to reach the timing time, the second controller is also used for controlling the disturbance current detection module to detect the disturbance current signals after the clock module times to reach the timing time, and the second controller is also used for sending the detection results of the disturbance current detection module to the concentrator.
In the technical scheme, the disturbance current signal is used for replacing the original high-current pulse signal to identify the station zone branch, so that the influence on the power grid equipment can be avoided; the stability of the equipment operation is ensured. The clock module is arranged at the acquisition terminal, the acquisition terminal controls the timing time of the clock module according to the message sent by the concentrator, and then the disturbance signal is sent at the time appointed by the concentrator, the disturbance current signal can be generated at any time theoretically, the situation that the disturbance current signal needs to be generated at the zero crossing point time of voltage like the traditional high-current pulse signal is avoided, the situation that the zero crossing time is waited for can be avoided, the detection efficiency can be improved, the corresponding voltage zero crossing detection module does not need to be equipped, and the cost can be reduced.
Further, the current disturbance signal sent by the disturbance current generation module is a sinusoidal disturbance current signal, and the frequency range of the sinusoidal disturbance current signal is 1-100 kHz.
The mutual coupling between low-voltage transformer areas can be caused by the fact that the frequency of the disturbance current signal is too high, and the coupling effect can occur on the high-voltage side by too low frequency, so that the accuracy of the identification result can be reduced to a certain extent; high frequency signals in the megahertz range are easily affected by equivalent capacitance in the actual grid load circuit, so that the actual situation deviates from the expectation to a large extent. The sine wave wavelength of the disturbance current signal of 1-100kHz is 3-300km in the vacuum theoretical length, which is enough to cover almost all low-voltage transformer areas, thereby not only reducing the noise influence and ensuring the signal transmission quality, but also ensuring that the disturbance current signal effectively covers the whole transformer area and ensuring the detection accuracy.
Further, the acquisition terminal further comprises a voltage zero-crossing detection module, the voltage zero-crossing detection module is used for detecting the voltage zero-crossing time in the power grid, the voltage zero-crossing detection module is electrically connected with a second controller, the second controller is further used for controlling the disturbance current generation module to send a disturbance current signal at the voltage zero-crossing time, and the second controller is further used for controlling the disturbance current detection module to detect the disturbance current signal at the voltage zero-crossing time. The voltage zero-crossing detection module is arranged, so that the existing mode of sending the disturbance signal at the voltage zero-crossing moment is compatible, the method is suitable for different application scenes, and the universality of the equipment is improved.
Further, the disturbance current detection module comprises a plurality of current transformers, and the plurality of current transformers are connected with the second controller in a multi-path differential mode. And the detection accuracy is improved by adopting a multi-path difference mode.
Further, the first communication module and the second communication module each include a power line carrier communication module. The communication is carried out in a power line carrier mode, an extra communication cable is not needed, and the communication method is simple and convenient.
The system further comprises a three-phase voltage detection module, the three-phase voltage detection module is electrically connected with a second controller, and the second controller is further used for detecting voltage information through the three-phase voltage detection module. And information such as voltage magnitude, phase and the like is detected by the voltage detection module.
Furthermore, the acquisition terminal further comprises an interaction module electrically connected with the second controller, and the interaction module comprises a display screen and a key. The data can be conveniently checked and the terminal can be conveniently set.
Furthermore, the acquisition terminal further comprises a positioning module, the positioning module is electrically connected with the second controller, and the second controller is further used for acquiring the position information of the acquisition terminal through the positioning module. The terminal position is positioned through the positioning module, and management is facilitated.
Further, the acquisition terminal further comprises a temperature sensor, and the temperature sensor is electrically connected with the second controller. The operating temperature of the terminal is detected through the temperature sensor, and temperature abnormity is found in time.
Further, the second communication module further comprises one or more of an infrared communication module, a mobile communication module, a bluetooth communication module and a serial communication module. And a plurality of communication modes are set, so that data connection and communication with the terminal are facilitated, and further, management personnel can acquire equipment data or set and manage the equipment.
Drawings
Fig. 1 is a schematic view of an installation structure in an embodiment of a platform zone branch recognition device of the present invention;
fig. 2 is a logic block diagram of a concentrator in an embodiment of a station zone branch identification apparatus according to the present invention;
fig. 3 is a logic block diagram of an acquisition terminal in a first embodiment of the station area branch identification apparatus of the present invention;
fig. 4 is a logic block diagram of an acquisition terminal in a second embodiment of the station area branch identification apparatus of the present invention;
fig. 5 is a circuit diagram of a three-phase voltage detection module in an embodiment of a station area branch identification apparatus of the present invention;
fig. 6 is a circuit diagram of an infrared emitting portion of an infrared communication module in an embodiment of a station area branch identification apparatus of the present invention;
fig. 7 is a circuit diagram of an infrared receiving portion of an infrared communication module in an embodiment of a station zone branch recognition apparatus of the present invention.
Detailed Description
The following is further detailed by way of specific embodiments:
example one
As shown in fig. 1, the station zone branch identification apparatus of this embodiment includes a concentrator and an acquisition terminal. In this embodiment, one concentrator corresponds to a plurality of acquisition terminals, and the acquisition terminals are disposed on each branch.
As shown in fig. 2, the concentrator includes a first controller and a first communication module electrically connected to the first controller, where the first controller is configured to control the first communication module to send a message to the acquisition terminal, and the first controller is further configured to control the first communication module to receive a detection result sent by the acquisition terminal.
As shown in fig. 3, the acquisition terminal includes a second controller, a disturbance current generation module, a second communication module, a disturbance current detection module, and a clock module, all of which are electrically connected to the second controller, the second controller is configured to control the second communication module to receive a message sent by the concentrator and set a timing time of the clock module according to the message, the second controller is configured to control the disturbance current generation module to generate and send a disturbance current signal after the clock module reaches the timing time, the second controller is further configured to control the disturbance current detection module to detect the disturbance current signal after the clock module reaches the timing time, and the second controller is further configured to control the second communication module to send a detection result of the disturbance current detection module to the concentrator.
Specifically, in this embodiment, the frequency range of the current disturbance signal sent by the disturbance current generation module is 1 to 100kHz, and in this embodiment, the disturbance current generation module adopts an existing sine wave generation circuit, which is used to send a low-frequency sine current signal of 10 kHz.
The disturbance current detection module comprises a plurality of current transformers, three current transformers are provided in the embodiment, and the three current transformers are connected with the ADC module of the second controller in a multi-path differential mode.
In this embodiment, the first communication module and the second communication module both include power line carrier communication modules, that is, data and command transmission is realized between the first controller and the second controller in a power line carrier manner. It should be noted that, in this implementation, the data and command transmission and reception between the concentrator and the acquisition terminal are all existing data transmission programs, and no improvement is involved. In this embodiment, concentrator and acquisition terminal all are equipped with 485 communication module to conveniently carry out data transmission through 485 communication protocol.
The first controller and the second controller are both single chips, in the embodiment, the first controller is preferably a WQ3001-AL31 controller, and the second controller is preferably a WQ3011-AL31 controller, in other embodiments of the present application, other types of microcontrollers can be selected.
The acquisition terminal further comprises a three-phase voltage detection module, an interaction module, a positioning module and a temperature sensor, the concentrator further comprises the interaction module and three voltage zero-crossing detection circuits, the three-phase voltage detection module adopts a voltage transformer, the circuit of the three-phase voltage detection module is shown in figure 5 and is electrically connected with an ADC module of the second controller, and the second controller is further used for detecting voltage information through the three-phase voltage detection module. The voltage information includes information such as voltage magnitude and phase.
The interactive module comprises an indicator light, a display screen and keys, wherein in the embodiment, the display screen adopts a 12864 liquid crystal display screen, and the keys adopt a keyboard formed by micro switches.
The positioning module is electrically connected with the second controller, and the second controller is further used for acquiring the position information of the acquisition terminal through the positioning module.
The temperature sensor is electrically connected with the second controller. The operating temperature of the terminal is detected through the temperature sensor, and temperature abnormity is found in time. In this embodiment, the temperature sensor and the clock module are integrated as a DS1629, which is connected to the second controller via I2C bus.
The first communication module and the second communication module further comprise one or more of an infrared communication module, a mobile communication module, a Bluetooth communication module and a serial communication module. Specifically, in this embodiment, the first communication module further includes an infrared communication module and a mobile communication module, the second communication module further includes an infrared communication module and a bluetooth communication module, the mobile communication module preferably selects a 4G communication module, an infrared communication module circuit is as shown in fig. 6 and 7, the setting of the infrared communication module is convenient for a manager to perform meter reading or setting in an infrared manner, and thus the manager can acquire device data or perform setting management on the device.
When the system is used specifically, all the branch acquisition terminals respectively send low-frequency current disturbance signals under the control of the concentrator, the other branch acquisition terminals detect the disturbance signals and feed results back to the concentrator through the power line carrier communication technology, and the concentrator can calculate the topology structure of the governed branch electric meter according to all the feedback results.
In the embodiment, the disturbance current signal is used for replacing the original large-current pulse signal to identify the station zone branch, so that the influence on the power grid equipment can be avoided; the stability of the equipment operation is ensured. The clock module is arranged at the acquisition terminal, the acquisition terminal controls the timing time of the clock module according to the message sent by the concentrator, and then the disturbance signal is sent at the time appointed by the concentrator, the disturbance current signal can be generated at any time theoretically, the situation that the disturbance current signal needs to be generated at the zero crossing point time of voltage like the traditional high-current pulse signal is avoided, the situation that the zero crossing time is waited for can be avoided, the detection efficiency can be improved, the corresponding voltage zero crossing detection module does not need to be equipped, and the cost can be reduced.
Example two
As shown in fig. 4, the difference between the present embodiment and the first embodiment is that in the present embodiment, the acquisition terminal further includes a voltage zero-crossing detection module, the voltage zero-crossing detection module is configured to detect a voltage zero-crossing time in the power grid, the voltage zero-crossing detection module is electrically connected to the second controller, the second controller is further configured to control the disturbance current generation module to generate and send a disturbance current signal at the voltage zero-crossing time, and control the disturbance current detection module to detect the disturbance current signal. The voltage zero-crossing detection module is arranged, so that the existing mode of sending the disturbance signal at the voltage zero-crossing moment is compatible, the method is suitable for different application scenes, and the universality of the equipment is improved.
The above are only embodiments of the present invention, and the present invention is not limited to the field related to this embodiment, and the common general knowledge of the known specific structures and characteristics in the scheme is not described too much, and those skilled in the art know the common technical knowledge in the technical field of the present invention before the application date or the priority date, can know all the prior art in this field, and have the ability to apply the conventional experimental means before this date, and those skilled in the art can combine their own ability to perfect and implement the scheme, and some typical known structures or known methods should not become the obstacles for those skilled in the art to implement the present application. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.
Claims (10)
1. A platform district branch recognition device which characterized in that: the method comprises the following steps:
the concentrator comprises a first controller and a first communication module electrically connected with the first controller, wherein the first controller is used for controlling the first communication module to send messages to the acquisition terminal, and the first controller is also used for controlling the first communication module to receive detection results sent by the acquisition terminal;
the acquisition terminal comprises a second controller, a disturbance current generation module, a second communication module, a disturbance current detection module and a clock module, wherein the disturbance current generation module, the second communication module, the disturbance current detection module and the clock module are all electrically connected with the second controller, the second controller is used for controlling the second communication module to receive messages sent by the concentrator and setting the timing time of the clock module according to the messages, the second controller is used for controlling the disturbance current generation module to generate and send disturbance current signals after the clock module times to reach the timing time, the second controller is also used for controlling the disturbance current detection module to detect the disturbance current signals after the clock module times to reach the timing time, and the second controller is also used for sending the detection results of the disturbance current detection module to the concentrator.
2. The station area branch identification device according to claim 1, wherein: the signal generated by the disturbing current generating module is a sine disturbing current signal, and the frequency range of the sine disturbing current signal is 1-100 kHz.
3. The station area branch identifying device according to claim 1 or 2, wherein: the acquisition terminal further comprises a voltage zero-crossing detection module, the voltage zero-crossing detection module is used for detecting the voltage zero-crossing time in the power grid, the voltage zero-crossing detection module is electrically connected with the second controller, the second controller is further used for controlling the disturbance current generation module to generate and send a disturbance current signal at the voltage zero-crossing time, and the second controller is further used for controlling the disturbance current detection module to detect the disturbance current signal at the voltage zero-crossing time.
4. The station area branch identifying device according to claim 1 or 2, wherein: the disturbance current detection module comprises a plurality of current transformers, and the plurality of current transformers are connected with the second controller in a multi-path differential mode.
5. The station area branch identifying device according to claim 1 or 2, wherein: the first communication module and the second communication module comprise power line carrier communication modules.
6. The station area branch identification device according to claim 1, wherein: the three-phase voltage detection module is electrically connected with the second controller, and the second controller is further used for detecting voltage information through the three-phase voltage detection module.
7. The station area branch identification device according to claim 1, wherein: the acquisition terminal further comprises an interaction module electrically connected with the second controller, and the interaction module comprises a display screen and a key.
8. The station area branch identification device according to claim 1, wherein: the acquisition terminal further comprises a positioning module, the positioning module is electrically connected with the second controller, and the second controller is further used for acquiring the position information of the acquisition terminal through the positioning module.
9. The station area branch identification device according to claim 1, wherein: the acquisition terminal further comprises a temperature sensor, and the temperature sensor is electrically connected with the second controller.
10. The station area branch identification device according to claim 1, wherein: the second communication module further comprises one or more of an infrared communication module, a mobile communication module, a Bluetooth communication module and a serial communication module.
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| CN201921761683.7U CN210954207U (en) | 2019-10-18 | 2019-10-18 | Platform district branch recognition device |
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| CN201921761683.7U CN210954207U (en) | 2019-10-18 | 2019-10-18 | Platform district branch recognition device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111884343A (en) * | 2020-08-05 | 2020-11-03 | 莱芜鲁能开源集团电器有限公司 | Equipment monitoring method and system based on power line high-speed carrier |
| CN111929634A (en) * | 2020-09-02 | 2020-11-13 | 华立科技股份有限公司 | N-line-based signal injection topology recognition device and method |
| CN115032881A (en) * | 2022-05-23 | 2022-09-09 | 国网河北省电力有限公司邯郸市肥乡区供电分公司 | Electric power acquisition terminal |
-
2019
- 2019-10-18 CN CN201921761683.7U patent/CN210954207U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111884343A (en) * | 2020-08-05 | 2020-11-03 | 莱芜鲁能开源集团电器有限公司 | Equipment monitoring method and system based on power line high-speed carrier |
| CN111929634A (en) * | 2020-09-02 | 2020-11-13 | 华立科技股份有限公司 | N-line-based signal injection topology recognition device and method |
| CN115032881A (en) * | 2022-05-23 | 2022-09-09 | 国网河北省电力有限公司邯郸市肥乡区供电分公司 | Electric power acquisition terminal |
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