CN114268171A - Distributed measurement system based on low-power-consumption wide area wireless network and control method - Google Patents
Distributed measurement system based on low-power-consumption wide area wireless network and control method Download PDFInfo
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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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 application provides a distributed measurement system and a control method based on a low-power-consumption wide area wireless network, wherein the system comprises a plurality of measurement nodes and a gateway; when any measurement node or gateway detects a power grid event, the measurement node or gateway stores the power grid event information into local equipment, and simultaneously sends event state signals to other measurement nodes and gateways or all measurement nodes; and after other measuring nodes and the gateway or all measuring nodes receive the event state signal, acquiring corresponding power grid state information according to the event type of the power grid event, and storing the power grid state information into local equipment. When any measurement node or gateway detects a power grid event, other measurement nodes and gateways or all measurement nodes acquire power grid state information corresponding to the event type of the power grid event, so that the synchronization of monitoring events of different measurement nodes in a measurement system is ensured.
Description
Technical Field
The application relates to the technical field of power internet of things, in particular to a distributed measurement system and a control method based on a low-power-consumption wide area wireless network.
Background
The low power consumption wide area wireless network (LPWAN) is a wireless Internet of things technology which is low in cost, wide in coverage and easy to deploy and maintain, and is particularly suitable for a power distribution network which is provided with a plurality of coverage nodes and is wide in distribution, and is used for monitoring the state of the power distribution network in cities and countryside and rural areas.
However, since the low-power wireless network has a limited communication bandwidth and a certain time delay exists in data transmission, synchronization of monitoring events of different measurement nodes in the measurement system cannot be ensured in practical application, which is not favorable for ensuring the reliability of the measurement system.
Disclosure of Invention
The application provides a distributed measurement system and a control method based on a low-power-consumption wide area wireless network, which aim to overcome the defects that the prior art cannot ensure the synchronization of monitoring events of different measurement nodes in the measurement system and the like.
A first aspect of the present application provides a distributed measurement system based on a low power consumption wide area wireless network, including: a plurality of measurement nodes and gateways;
when any measurement node or gateway detects a power grid event, the measurement node or gateway stores the power grid event information into local equipment, and simultaneously sends event state signals to other measurement nodes and gateways or all measurement nodes; wherein the event status signal comprises an event type of the grid event;
and after the other measurement nodes and the gateway or all the measurement nodes receive the event state signal, acquiring corresponding power grid state information according to the event type of the power grid event, and storing the power grid state information to local equipment.
Optionally, the gateway is further configured to:
and after the other measurement nodes finish acquiring and storing the power grid state information, sending a reset request to all the measurement nodes so as to enable the gateway and all the measurement nodes to enter an event waiting state of the next round.
Optionally, when any measurement node or gateway detects a grid event, the measurement node or gateway enters a state of detecting the event.
Optionally, after the other measurement nodes and the gateway, or all the measurement nodes receive the event state signal, the other measurement nodes and the gateway, or all the measurement nodes enter a state of receiving an event.
Optionally, the measurement node and the gateway are further configured to:
when the remaining storage space of the local device is smaller than a preset threshold, determining to-be-deleted power grid event information and/or to-be-deleted power grid state information according to the priority of the currently stored power grid event information and/or power grid state information, and deleting the to-be-deleted power grid event information and/or to-be-deleted power grid state information in the local device.
Optionally, the measurement node or the gateway further sends an event synchronization status signal to other measurement nodes and gateways, or all measurement nodes; wherein the event synchronization status signal includes MSB encoding and LSB encoding.
Optionally, after receiving the event synchronization status signal sent by the other device, any measurement node or gateway determines whether the measurement node or gateway corresponding to the device detects an event status or receives an event status according to the LSB code.
Optionally, the event status signal further includes an occurrence time of the grid event.
Optionally, the method further includes:
and the control center is used for receiving the power grid event information and the corresponding power grid state information.
A second aspect of the present application provides a method for controlling a distributed measurement system based on a low power consumption wide area wireless network, including:
when any measurement node or gateway detects a power grid event, controlling the measurement node or gateway to store the power grid event information into local equipment, and simultaneously sending event state signals to other measurement nodes and gateways or all measurement nodes; wherein the event status signal comprises an event type of the grid event;
and after the other measurement nodes and the gateways or all the measurement nodes receive the event state signals, controlling the other measurement nodes and the other gateways to acquire corresponding power grid state information according to the event type of the power grid event and storing the power grid state information into local equipment.
Optionally, the method further includes:
and controlling the gateway, and sending a reset request to all the measurement nodes after all the other measurement nodes finish acquiring and storing the power grid state information so as to enable the gateway and all the measurement nodes to enter an event waiting state of the next round.
Optionally, when any measurement node or gateway detects a grid event, the measurement node or gateway is controlled to enter an event detection state.
Optionally, after the other measurement nodes and the gateway, or all the measurement nodes receive the event state signal, the other measurement nodes and the gateway, or all the measurement nodes are controlled to enter a state of receiving the event.
Optionally, the method further includes:
and controlling the measurement node and the gateway, determining to-be-deleted power grid event information and/or to-be-deleted power grid state information according to the priority of the currently stored power grid event information and/or power grid state information when the residual storage space of the local equipment is smaller than a preset threshold, and deleting the to-be-deleted power grid event information and/or the to-be-deleted power grid state information in the local equipment.
Optionally, the method further includes:
the control measurement node or the gateway also sends an event synchronization state signal to other measurement nodes and gateways or all the measurement nodes; wherein the event synchronization status signal includes MSB encoding and LSB encoding.
Optionally, after receiving the event synchronization status signal sent by the other device, any measurement node or gateway controls the measurement node or gateway to determine whether the measurement node or gateway corresponding to the device detects an event status or receives an event status according to the LSB code.
Optionally, the event status signal further includes an occurrence time of the grid event.
Optionally, the method further includes:
and a control center in the control system receives the power grid event information and the corresponding power grid state information.
This application technical scheme has following advantage:
the application provides a distributed measurement system and a control method based on a low-power-consumption wide area wireless network, wherein the system comprises a plurality of measurement nodes and a gateway; when any measurement node or gateway detects a power grid event, the measurement node or gateway stores the power grid event information into local equipment, and simultaneously sends event state signals to other measurement nodes and gateways or all measurement nodes; wherein the event status signal comprises an event type of the grid event; and after other measuring nodes and gateways or all measuring nodes receive the event state signals, acquiring corresponding power grid state information according to the event type of the power grid event, and storing the power grid state information into local equipment. According to the system provided by the scheme, when any measurement node or gateway detects a power grid event, other measurement nodes and gateways or all measurement nodes acquire power grid state information corresponding to the event type of the power grid event, and the detected power grid event information or the detected power grid state information is stored in local equipment by all the measurement nodes and gateways, so that decoupling of event synchronization and data uploading is realized, synchronization of monitoring events of different measurement nodes in the measurement system is ensured, and the influence of the defect of limited bandwidth of a low-power-consumption wireless network on the reliability of the power grid measurement system is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art according to these drawings.
Fig. 1 is a schematic structural diagram of a distributed measurement system based on a low-power wide area wireless network according to an embodiment of the present disclosure;
fig. 2 is a logic diagram of a measurement node state machine according to an embodiment of the present disclosure;
fig. 3 is a logic diagram of a gateway state machine according to an embodiment of the present application;
fig. 4 is a flowchart illustrating a control method of a distributed measurement system based on a low-power wide area wireless network according to an embodiment of the present disclosure.
With the above figures, there are shown specific embodiments of the present application, which will be described in more detail below. These drawings and written description are not intended to limit the scope of the disclosed concepts in any way, but rather to illustrate the concepts of the disclosure to those skilled in the art by reference to specific embodiments.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the following examples, "plurality" means two or more unless specifically limited otherwise.
In the prior art, generally, when any measurement node detects a grid event, the gateway closest to the measurement node is used to send the grid event information to the control center, and after receiving the grid event information, the control center controls other measurement nodes in the current measurement system to collect grid state information corresponding to the grid event information and send the collected grid state information to the control center. However, since the low-power wireless network has a limited communication bandwidth and a certain time delay exists in data transmission, synchronization of monitoring events of different measurement nodes in the measurement system cannot be ensured in practical application, which is not favorable for ensuring the reliability of the measurement system.
In order to solve the above problems, the distributed measurement system and the control method based on the low power consumption wide area wireless network provided by the embodiment of the application include a plurality of measurement nodes and a gateway; when any measurement node or gateway detects a power grid event, the measurement node or gateway stores the power grid event information into local equipment, and simultaneously sends event state signals to other measurement nodes and gateways or all measurement nodes; wherein the event status signal comprises an event type of the grid event; and after other measuring nodes and the gateway or all measuring nodes receive the event state signal, acquiring corresponding power grid state information according to the event type of the power grid event, and storing the power grid state information into local equipment. According to the system provided by the scheme, when any measurement node or gateway detects a power grid event, other measurement nodes and gateways or all measurement nodes acquire power grid state information corresponding to the event type of the power grid event, and the detected power grid event information or the detected power grid state information is stored in local equipment by all the measurement nodes and gateways, so that decoupling of event synchronization and data uploading is realized, synchronization of monitoring events of different measurement nodes in the measurement system is ensured, and the influence of the defect of limited bandwidth of a low-power-consumption wireless network on the reliability of the power grid measurement system is reduced.
The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments. Embodiments of the present invention will be described below with reference to the accompanying drawings.
The embodiment of the application provides a distributed measurement system based on a low-power-consumption wide area wireless network, which is used for detecting events such as power grid faults and power grid interference of a power distribution network.
As shown in fig. 1, a schematic structural diagram of a distributed measurement system based on a low power consumption wide area wireless network according to an embodiment of the present application is provided, where the system 10 includes: a plurality of metering nodes 101 and a gateway 102.
When any measurement node or gateway detects a power grid event, the measurement node or gateway stores the power grid event information into local equipment, and simultaneously sends event state signals to other measurement nodes and gateways or all the measurement nodes; wherein the event status signal comprises an event type of the grid event; and after other measuring nodes and gateways or all measuring node gateways receive the event state signals, acquiring corresponding power grid state information according to the event type of the power grid event, and storing the power grid state information into local equipment.
It should be noted that the power distribution network has a large coverage area, a large number of loads and a large number of types, and needs to perform online monitoring on the power supply quality and the operation state of the power grid, and particularly can detect and locate the occurring interference and faults. Grid event information may refer to data basis, such as voltage and current, that determines the occurrence of the grid event. Wherein the event status signal may further include the occurrence time of the grid event.
It should be further noted that the gateway in the distributed measurement system provided in the embodiment of the present application has a data forwarding function, and also has event detection and power grid state information acquisition functions that are the same as those of the measurement node, so that the gateway can serve as the measurement node in the distributed measurement system, thereby improving the resource utilization rate of the distributed measurement system.
Specifically, when any measurement node or gateway in the system detects a grid event, the other measurement nodes and gateways, or all measurement nodes send event status signals to acquire grid status information corresponding to the event type of the grid event, where the data composition of the grid status information is the same as that of the grid event information. In addition, in the distributed measurement system provided by the embodiment of the application, all the measurement nodes and gateways firstly store the detected power grid event information or power grid state information in the local device, and only transmit the event state signal, so that the communication resources of the low-power-consumption wide area wireless network are saved.
The gateway and each measurement node in the distributed measurement system provided by the embodiment of the application have the following functions: wireless communication, storage, measurement, clock, and computational control.
Further, in an embodiment, the system further includes a control center for receiving the grid event information and the corresponding grid state information.
Specifically, the control center can analyze the currently-occurring power grid event according to the obtained power grid event information and the corresponding power grid state information, and further can determine a corresponding solution strategy so as to guarantee the safety of the power distribution network.
On the basis of the foregoing embodiment, in order to further improve the reliability of the distributed measurement system, as an implementable manner, on the basis of the foregoing embodiment, in an embodiment, the gateway is further configured to send a reset request to all measurement nodes after each other measurement node completes acquisition and storage of the grid state information, so that the gateway and all measurement nodes enter the event waiting state of the next round.
Specifically, in order to avoid that the measurement nodes of the distributed measurement system cannot accurately determine the current grid state information to be collected, the gateway may send a reset request to all the measurement nodes once each time one round of event synchronization is completed (each other measurement node completes acquisition and storage of the grid state information), so as to start a new round of event synchronization process, that is, the gateway and all the measurement nodes enter a next round of event waiting state.
Similarly, in one embodiment, when any measurement node or gateway detects a grid event, the measurement node or gateway enters a detected event state.
Further, in an embodiment, after the other measurement nodes and the gateway, or all the measurement nodes receive the event status signal, the other measurement nodes and the gateway, or all the measurement nodes enter the received event status.
To facilitate better understanding of the distributed measurement system provided in the embodiment of the present application by those skilled in the art, as shown in fig. 2, a logic diagram of a measurement node state machine provided in the embodiment of the present application is shown, and as shown in fig. 3, a logic diagram of a gateway state machine provided in the embodiment of the present application is shown.
First, the gateway starts event synchronization by issuing a reset request, or ends the previous round of event synchronization, and starts a new round of event synchronization. The measurement node, after receiving the reset request of the gateway, has to enter a reset acknowledge state regardless of the state. When the states of all the nodes are changed into reset confirmation, the gateway firstly enters a waiting event state, then the measurement nodes enter the waiting event state, and the detection or the receiving of the event is started. When the event is detected by the measuring node, the state of detecting the event is entered, and the event type and the time are determined. When the measurement node receives a detected event or a received event sent by other nodes (through the gateway) or the gateway, the measurement node enters a received event state and adopts a corresponding event type and time. The node enters the received event state when it receives an event that occurs earlier in time, updates the event type and time (when there are multiple events, the node prioritizes the event that occurs earlier) and maintains the detected event state when it detects or receives an event that occurs equal to or later. Therefore, as a result of the event synchronization arbitration, only one node detects an event in the state, and the other nodes receive the event in the state, and the event type and time of all the nodes are the same. When the node receives the event with earlier occurrence time, the event type and time are updated, and the state of receiving the event is kept. This may happen, for example, if a node detects an earlier event, and other nodes receive the event synchronization information sent by the node very late due to network conditions. When a node detects or receives an event that occurs at or later than the node, the received event state is maintained. When the gateway detects that the event types and the time information of all the nodes are consistent, namely after the current power grid state information is acquired and stored by all the other measurement nodes and other gateways, all the nodes are synchronized to the same event. The gateway sends a reset request to finish the event synchronization arbitration of the current round. The nodes upload the corresponding measurement data individually, as shown in fig. 2 and 3, the gateway acts as the measurement node when waiting for an event, detecting an event, and receiving an event state, and the only difference is that the gateway can enter a reset request state from any state to reset the system.
Specifically, in an embodiment, the measurement node or the gateway further sends an event synchronization status signal to other measurement nodes and gateways, or all measurement nodes; wherein the event synchronization status signal includes an MSB code and an LSB code.
Further, in an embodiment, after receiving the event synchronization status signal sent by the other device, any measurement node or gateway determines whether the measurement node or gateway corresponding to the device detects the event status or receives the event status according to the LSB code.
The other devices specifically refer to other measurement nodes or gateways.
Illustratively, table 1 provides gateway state description and event synchronization status signals for the embodiments of the present application:
table 1 table 2 shows the status description of the measurement node and the event synchronization status signal provided in the embodiment of the present application:
TABLE 2
Specifically, when the measurement node and the gateway detect an event or receive an event status, the measurement node and the gateway need to transmit event type and time information in addition to 2-bit event synchronization status information (see table 1 and table 2). With the proposed coding methods of table 1 and table 2, the receiver can check whether the data is present by the last bit (LSB) of the state coding. When the LSB is 1, it is known that event types and time information need to be detected corresponding to the detected event or the received event, which facilitates the specific implementation.
In the distributed measurement system provided in the embodiment of the present application, all measurement nodes (nodes) and gateway event synchronization states are repeatedly sent until the measurement nodes are successfully executed, specifically, the gateway and the nodes repeatedly send respective latest synchronization states, and if a data packet is lost, the next data packet transmits the latest state information, so that there is no congestion point even in a communication channel with a high packet loss rate, and the robustness of the system is improved.
Specifically, in an embodiment, because the storage capacities of the local devices of the gateway and the measurement node are limited, when the remaining storage space of the local device is smaller than a preset threshold, the grid event information to be deleted and/or the grid state information to be deleted may be determined according to the priorities of the currently stored grid event information and/or grid state information, and the grid event information to be deleted and/or the grid state information to be deleted may be deleted in the local device.
It should be noted that the priority of each grid event information and/or each grid state information may be specifically determined according to an actual situation, for example, the priority is determined according to the occurrence time or the priority is determined according to the corresponding event type, and the like, and the embodiment of the present application is not limited specifically.
The distributed measurement system based on the low-power-consumption wide area wireless network comprises a plurality of measurement nodes and a gateway; when any measurement node or gateway detects a power grid event, the measurement node or gateway stores the power grid event information into local equipment, and simultaneously sends event state signals to other measurement nodes and gateways or all measurement nodes; wherein the event status signal comprises an event type of the grid event; and after other measuring nodes and the gateway or all measuring nodes receive the event state signal, acquiring corresponding power grid state information according to the event type of the power grid event, and storing the power grid state information into local equipment. According to the system provided by the scheme, when any measurement node or gateway detects a power grid event, other measurement nodes and gateways or all measurement nodes acquire power grid state information corresponding to the event type of the power grid event, and the detected power grid event information or the detected power grid state information is stored in local equipment by all the measurement nodes and gateways, so that decoupling of event synchronization and data uploading is realized, synchronization of monitoring events of different measurement nodes in the measurement system is ensured, and the influence of the defect of limited bandwidth of a low-power-consumption wireless network on the reliability of the power grid measurement system is reduced. And under the condition of low communication rate, the distributed nodes can still quickly synchronize the same event, the storage resource requirement of data is reduced, and the purposes of interference detection and positioning based on the multipoint correlation analysis technology are achieved.
The embodiment of the application provides a control method for a distributed measurement system based on a low-power-consumption wide area wireless network, which is used for controlling the distributed measurement system based on the low-power-consumption wide area wireless network provided by the embodiment. The implementation subject of the embodiment of the present application is an electronic device, such as a server, a desktop computer, a notebook computer, a tablet computer, and other electronic devices that can be used to control the distributed measurement system based on the low power consumption wide area wireless network provided in the foregoing embodiments.
As shown in fig. 4, a schematic flow chart of a control method of a distributed measurement system based on a low-power wide area wireless network according to an embodiment of the present application is shown, where the method includes:
Wherein the event status signal includes an event type of the grid event.
Specifically, in an embodiment, the method further includes:
and the control gateway sends a reset request to all the measurement nodes after the other measurement nodes finish acquiring and storing the power grid state information so as to enable the gateway and all the measurement nodes to enter an event waiting state of the next round.
Specifically, in one embodiment, when any measurement node or gateway detects a grid event, the measurement node or gateway is controlled to enter a detected event state.
Specifically, in an embodiment, after the other measurement nodes and the gateway, or all the measurement nodes receive the event status signal, the other measurement nodes and the gateway, or all the measurement nodes are controlled to enter the received event status.
Specifically, in an embodiment, the method further includes:
and controlling the measurement node and the gateway, determining the power grid event information to be deleted and/or the power grid state information to be deleted according to the priority of the currently stored power grid event information and/or power grid state information when the residual storage space of the local equipment is smaller than a preset threshold, and deleting the power grid event information to be deleted and/or the power grid state information to be deleted in the local equipment.
Specifically, in an embodiment, the method further includes:
the control measurement node or the gateway also sends an event synchronization state signal to other measurement nodes and gateways or all the measurement nodes; wherein the event synchronization status signal includes an MSB code and an LSB code.
Specifically, in an embodiment, after receiving an event synchronization status signal sent by another device, any measurement node or gateway controls the measurement node or gateway to determine whether the measurement node or gateway corresponding to the device detects an event status or receives an event status according to the LSB code.
The other devices specifically refer to other measurement nodes or gateways.
Specifically, in one embodiment, the event status signal further includes the time of occurrence of the grid event.
Specifically, in an embodiment, the method further includes:
and a control center in the control system receives the power grid event information and the corresponding power grid state information.
With regard to the method for controlling a distributed measurement system based on a low power consumption wide area wireless network in the present embodiment, the specific manner of each step has been described in detail in the embodiment related to the system, and will not be described in detail herein.
The distributed measurement system control method based on the low-power-consumption wide area wireless network provided by the embodiment of the application is used for executing the distributed measurement system method based on the low-power-consumption wide area wireless network provided by the embodiment, and the implementation manner and the principle are the same, and are not described again.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.
Claims (10)
1. A distributed measurement system based on a low-power wide area wireless network is characterized by comprising: a plurality of measurement nodes and gateways;
when any measurement node or gateway detects a power grid event, the measurement node or gateway stores the power grid event information into local equipment, and simultaneously sends event state signals to other measurement nodes and gateways or all measurement nodes; wherein the event status signal comprises an event type of the grid event;
and after the other measurement nodes and the gateway or all the measurement nodes receive the event state signal, acquiring corresponding power grid state information according to the event type of the power grid event, and storing the power grid state information to local equipment.
2. The system of claim 1, wherein the gateway is further configured to:
and after the other measurement nodes finish acquiring and storing the power grid state information, sending a reset request to all the measurement nodes so as to enable the gateway and all the measurement nodes to enter an event waiting state of the next round.
3. The system of claim 1, wherein any measurement node or gateway enters a detected event state when it detects a grid event.
4. The system according to claim 3, wherein after said event status signal is received by said other measurement node and gateway, or all measurement nodes, said other measurement node and gateway, or all measurement nodes enter a received event status.
5. The system of claim 1, wherein the metering node and gateway are further configured to:
when the remaining storage space of the local device is smaller than a preset threshold, determining to-be-deleted power grid event information and/or to-be-deleted power grid state information according to the priority of the currently stored power grid event information and/or power grid state information, and deleting the to-be-deleted power grid event information and/or to-be-deleted power grid state information in the local device.
6. The system according to claim 1, wherein said measurement node or gateway further sends an event synchronization status signal to other measurement nodes and gateways, or all measurement nodes; wherein the event synchronization status signal includes MSB encoding and LSB encoding.
7. The system according to claim 6, wherein after receiving said event synchronization status signal sent by other device, any measurement node or gateway determines whether the measurement node or gateway corresponding to the device is in an event detected state or in an event received state according to said LSB code.
8. The system of claim 1, wherein the event status signal further comprises a time of occurrence of the grid event.
9. The system of claim 1, further comprising:
and the control center is used for receiving the power grid event information and the corresponding power grid state information.
10. A distributed measurement system control method based on a low-power-consumption wide area wireless network is characterized by comprising the following steps:
when any measurement node or gateway detects a power grid event, controlling the measurement node or gateway to store the power grid event information into local equipment, and simultaneously sending event state signals to other measurement nodes and gateways or all measurement nodes; wherein the event status signal comprises an event type of the grid event;
and after the other measurement nodes and the gateway, or all the measurement nodes receive the event state signal, controlling the other measurement nodes and the gateway, or all the measurement nodes to acquire corresponding power grid state information according to the event type of the power grid event, and storing the power grid state information into local equipment.
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