CN118157317A - A lightweight method for power quality monitoring and analysis - Google Patents
A lightweight method for power quality monitoring and analysis Download PDFInfo
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- CN118157317A CN118157317A CN202410299080.9A CN202410299080A CN118157317A CN 118157317 A CN118157317 A CN 118157317A CN 202410299080 A CN202410299080 A CN 202410299080A CN 118157317 A CN118157317 A CN 118157317A
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- power quality
- quality monitoring
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- container application
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote monitoring or remote control of equipment in a power distribution network
- H02J13/12—Monitoring network conditions, e.g. electrical magnitudes or operational status
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote monitoring or remote control of equipment in a power distribution network
- H02J13/10—Circuit arrangements for providing remote monitoring or remote control of equipment in a power distribution network characterised by displaying of information or by user interaction, e.g. supervisory control and data acquisition [SCADA] systems
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote monitoring or remote control of equipment in a power distribution network
- H02J13/13—Circuit arrangements for providing remote monitoring or remote control of equipment in a power distribution network characterised by the transmission of data to equipment in the power network
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote monitoring or remote control of equipment in a power distribution network
- H02J13/13—Circuit arrangements for providing remote monitoring or remote control of equipment in a power distribution network characterised by the transmission of data to equipment in the power network
- H02J13/1331—Circuit arrangements for providing remote monitoring or remote control of equipment in a power distribution network characterised by the transmission of data to equipment in the power network using wireless data transmission
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote monitoring or remote control of equipment in a power distribution network
- H02J13/16—Circuit arrangements for providing remote monitoring or remote control of equipment in a power distribution network the power network being controlled at grid-level, e.g. using aggregators
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/2801—Broadband local area networks
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Abstract
A method for monitoring and analyzing the power quality and lightening the weight is to create a new container application in a container management area, and the existing container application synchronizes all data of the new container application; the new container application communicates and interacts with the power quality monitoring terminal based on the layered local area network, and the power quality monitoring terminal establishes communication with the new container application; the new container application service acquires basic data of the power quality monitoring terminal, and sends the result to the power quality management system side for use after calculation of the new container; when the container application involves the interaction of the container and the power quality monitoring terminal, a layered local area network is established by adopting a multi-layer network communication method. According to the invention, the calculation and analysis of the electric energy quality are moved upwards to a new container formed by software, and only the electric energy quality monitoring terminal is required to provide basic measurement data, so that the calculation and analysis of the electric energy quality are completed by the container, and the hardware cost is effectively reduced; because the container services are mutually isolated, the analysis application can be customized flexibly according to the power quality characteristics of different nodes.
Description
Technical Field
The invention belongs to the field of operation and control of power systems, and particularly relates to a method for monitoring, analyzing and lightening power quality of a power grid.
Background
The construction of a novel power system taking new energy as a main body is a national key development strategy for promoting the development and utilization of new energy in China and promoting the adjustment of energy structures in China. The power grid business is an application type field of tight-buckling technology development, particularly, under the drive of novel power system construction, new energy is connected into grid connection in a large scale to bring more uncertainty and randomness to the power grid, various unexpected problems are brought, such as problems of voltage exceeding, harmonic exceeding and the like, power quality problems of medium-high frequency harmonic, wide-frequency domain oscillation and the like in the power grid are increasingly frequent, the power quality monitoring terminal is used for enhancing monitoring, a research strategy is formulated continuously aiming at the discovered problems, and the enhanced power quality monitoring of a power distribution network and a user side is an important means for improving the stability of the power grid and is also a treatment foundation.
At present, the power distribution network and the nodes at the user side show sea level, the difference of the power quality between the areas is large, a light and flexible monitoring technology is needed, the existing power quality monitoring terminal has more functions of solidification, collection, calculation and communication can be integrated, if the functions and the application are to be updated in this way, the cost is high, and the whole machine is required to be replaced sometimes. The power quality terminal is light, mainly refers to volume, power consumption, functions and the like so as to adapt to the monitoring requirements of a complex power distribution network and a user side, and flexible activation refers to flexible adjustment and addition of functions according to the characteristics of a monitored object, and the power quality terminal in the current engineering is mainly designed for a main network, so that the power quality terminal is too large in volume, high in power consumption and difficult in function updating. Meanwhile, the power quality monitoring terminal is usually in parallel communication with a system with functions of collecting, analyzing, storing and the like of the power quality, the system is required to be in parallel communication with tens of thousands of nodes, so that the requirement on hardware resources at the system side is high in pressure, the communication stability of a power distribution network is low, the problem of data loss is serious, and the light-weight requirement of the power quality terminal cannot be met.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, provide a method for monitoring and analyzing the electric energy quality and lightening the weight, solve the problems of too large volume, high power consumption and difficult function updating of an electric energy quality terminal system in the current engineering, design the electric energy quality monitoring terminal for lightening the weight, and improve the flexibility of function application.
The invention builds an application scheme for single-function flexible activation in electric energy quality monitoring through a container technology from the light-weight of the electric energy quality monitoring analysis function, and simultaneously improves the communication reliability and reduces the system side resource pressure through a communication mode of layered core points.
The electric energy quality monitoring system is sunk from the main network to the power distribution network and the user side, and because of the sea quantity of the nodes of the power distribution network and the user side, a local power supply bureau in a city can reach millions of nodes, and in order to ensure the communication requirement of mass nodes between a container and an electric energy quality monitoring terminal, a layered local area network is required to be established by a multi-layer network communication method.
The technical scheme of the invention is as follows:
Step 1: creating a new container application in the container management area, wherein the new container application comprises the services of the existing container application and the newly added services; sending the created message of the new container application to the existing container application;
Step 2: the existing container application synchronizes all data to the new container application, and after updating, the new container application is consistent with the existing container application in data and functions;
step 3: deleting the existing container application;
Step 4: the new container application communicates and interacts with the power quality monitoring terminal based on the layered local area network, and the power quality monitoring terminal establishes communication with the new container application;
step 5: transmitting an application service requirement to an on-site power quality monitoring terminal through a new container application;
step 6: the new container application service acquires basic data of the power quality monitoring terminal, and sends the result to the power quality management system side for use after calculation of the new container;
and when the container application in the step 4, the step 5 and the step 6 involves the interaction between the container and the power quality monitoring terminal, a layered local area network is established by adopting a multi-layer network communication method.
The invention adopts a multi-layer network communication method to establish a layered local area network as;
(1) Taking the container management area as a root node for initiating or ending communication, wherein all containers are root nodes, namely a first layer;
(2) The root node forms a second layer through the power quality monitoring terminal which can communicate with the next hop, and the root node transmits data to a core node of the second layer;
(3) The core node of the second layer transmits the data to the power quality monitoring terminals of other non-core nodes of the second layer, so that the power quality monitoring terminals of the second layer can receive the data;
(4) The core node of the second layer forms a third layer through an electric energy quality monitoring terminal which can communicate with the next hop;
(5) Similarly, the second layer core node transmits data to the third layer core node, and the third layer core node transmits the data to the power quality monitoring terminals of other non-core nodes of the third layer, so that the power quality monitoring terminals of the third layer can all receive the data; and sequentially recursing until all the power quality monitoring terminals receive the commands of the corresponding containers.
The method of the invention determines the core node as the most power quality monitoring terminal which can be connected with other power quality monitoring terminals through one hop in each layer.
The number of the core nodes is greater than or equal to 1.
The determination of the core nodes is increased or decreased according to the number of the nodes at each layer, so that the communication pressure of the core nodes at the layer is reduced, the redundancy of communication links is increased, and the communication reliability is improved.
When the power quality monitoring terminal is communicated with the container management area, when a next-layer core node forwards commands or data from a plurality of upper-layer core nodes, when one of the core nodes is abnormal, the other core node can still provide the commands or the data to the next-layer core node, and when the next-layer core nodes all receive the commands or the data to be forwarded by the plurality of upper-layer core nodes, the next-layer core node judges whether the commands are consistent, if the commands are consistent, the previously received commands or the data to be forwarded are executed, and then the same commands received later are not executed, and if the commands are inconsistent, the new commands or the data are considered to be executed.
The related isolation among the new container applications does not affect each other, and the new container applications can have different functional applications.
The newly added service applied by the new container can be a calculation application function or an analysis application function, or a harmonic wave exceeding evaluation, voltage exceeding evaluation, frequency exceeding, voltage fluctuation and flicker exceeding, three-phase voltage unbalance degree application function.
The new container of the present invention is a standard software unit that packages together code and all its dependencies so that applications can run quickly and reliably from one computing environment to another, targeting power quality applications. According to the function requirements of each new container application, the data interaction with the power quality monitoring terminal can be carried out through wireless networks such as 4G, 5G and the like, the function index calculation is completed according to the calculation strategy of the new container application, and then the edge calculation result is sent to the power quality management system terminal to support larger areas and deep applications.
The invention only needs to have the functions of acquisition and communication in the power quality monitoring terminal, thereby reducing the requirements of software and hardware of the power quality monitoring terminal.
The invention constructs the power quality monitoring analysis light system by a power quality monitoring terminal, a container management system, a power quality management system and the like. Each power quality monitoring terminal has a container in the container management system, and the containers are isolated relatively and have no influence on each other. The advantage of this design is that when one container is abnormal, the other containers can continue to work. During normal operation, each container performs data interaction with the power distribution network and the power quality monitoring terminal of the user section according to the function requirements of the container, specifically, the function index calculation can be completed through wireless networks such as 4G, 5G and the like according to the calculation strategy of the container, and then the edge calculation result is sent to the power quality management system to support larger areas and deep application. After the application function is moved to the container end, on one hand, the requirements of software and hardware of the power quality terminal are reduced, meanwhile, the flexibility of the application function is improved, and the customized function is easier to realize, that is, the function applications contained in the containers A 'and B' can be different, for example, A 'can be unique harmonic prediction application, and B' can be unique voltage sag analysis application.
In the existing power quality management technical scheme, analysis services such as harmonic wave exceeding analysis are generally sunk to a power quality monitoring terminal, so that the hardware requirement and cost of the power quality monitoring terminal are correspondingly increased, and the power quality monitoring price in the market is relatively high (about 1 ten thousand per station), so that the power quality management is restricted to be widely applied. Therefore, the calculation and analysis of the electric energy quality are moved upwards to a container (new container) formed by software, and only the electric energy quality monitoring terminal is required to provide basic measurement data, so that the calculation and analysis of the electric energy quality are completed by the container, and the hardware cost is effectively reduced; meanwhile, due to mutual isolation between container services, the method can flexibly customize analysis applications according to the power quality characteristics of different nodes, for example: for nodes with distributed photovoltaic access, a resonance analysis function can be added to the node containers, and harmonic traceability services and the like can be added to containers corresponding to nodes of a monitoring factory.
Drawings
FIG. 1 is a diagram illustrating a prior art architecture;
FIG. 2 is a schematic diagram of a method according to the present invention;
FIG. 3 is a diagram of an example network;
The present invention will be described in detail with reference to the accompanying drawings.
Detailed Description
FIG. 1 is a diagram illustrating an example of a prior art container prior to a upgrade.
Fig. 2 is a diagram illustrating an exemplary architecture (of some container updates) of the method of the present invention.
When the container service is updated (the container service update can be partial update of the existing container service or complete update of the existing container service according to the requirement), the method of the invention needs to execute the following procedures:
Step 1: the container manager creates a new container application, e.g., named a ", in the container management area, which contains existing a' services and newly added harmonic superscalar. At the same time, the container manager sends a message to the existing container application a' that a new container application a″ is created;
Step 2: the existing container application synchronizes all its data to the new container application, for example: a ' synchronizes data to A ' '; after updating, the new container application is consistent with the existing container application data and functions;
step 3: deleting the existing container application;
Step 4: the new container application is communicated and interacted with the power quality monitoring terminal based on the layered local area network, and the power quality monitoring terminal establishes communication with the new container application, such as the power quality monitoring terminal A establishes communication with A '';
step 5: sending an application service requirement to an on-site power quality monitoring terminal, such as A '', through a new container application, and sending update information to the power quality monitoring terminal A;
step 6: the new container application service acquires basic data of the power quality monitoring terminal, and sends the result to the power quality management system side for use after calculation of the new container;
and when the container application in the step 4, the step 5 and the step 6 involves the interaction between the container and the power quality monitoring terminal, a layered local area network is established by adopting a multi-layer network communication method.
The method for establishing the layered local area network by adopting the multi-layer network communication method comprises the following steps:
(1) Taking the container management area as a root node for initiating or ending communication, wherein all containers are root nodes, namely a first layer;
(2) The root node forms a second layer through the power quality monitoring terminal which can communicate with the next hop, and the root node transmits data to a core node of the second layer;
(3) The core node of the second layer transmits the data to the power quality monitoring terminals of other non-core nodes of the second layer, so that the power quality monitoring terminals of the second layer can receive the data;
(4) The core node of the second layer forms a third layer through an electric energy quality monitoring terminal which can communicate with the next hop;
(5) Similarly, the second layer core node transmits data to the third layer core node, and the third layer core node transmits the data to the power quality monitoring terminals of other non-core nodes of the third layer, so that the power quality monitoring terminals of the third layer can all receive the data; and sequentially recursing until all the power quality monitoring terminals receive the commands of the corresponding containers.
The scheme of the invention is constructed by a regional power quality monitoring terminal, a container management area, a power quality management system and the like, wherein each power quality monitoring terminal is provided with a container in the container management area, and the containers are related and isolated without mutual influence. The advantage of this design is that when one container is abnormal, the other containers can continue to work.
Taking fig. 3 as an example, the direct connection in the figure represents that communication can be established in 1 hop, and three nodes of A, B and C are connected with a root node, namely { A, B and C } are second-layer networks; then, starting from A, B and C, searching a third layer by one hop, wherein A is connected with { D, E } by one hop, B is connected with { E, F } by one hop, C is connected with { F, G } by one hop, namely the third layer network is { D, E, F, G }; accordingly, a fourth layer network { H, I, J } is obtained.
In the existing engineering application, all the power quality monitoring terminals are synchronously and parallelly communicated with the root node, so that larger parallel computing pressure is caused to the root node, and communication failure is easily caused due to no redundancy coordination. Therefore, the problem can be effectively relieved through the transfer of the core node; when the regional power quality monitoring terminal H communicates with the container management area, a message is firstly sent to the core node B of the second-layer network, then passes through the third-layer core node E, and finally is provided for H through E. In the invention, the point with the largest one-hop connection point in each layer is taken as a core node, in the second layer { A, B and C } three electric energy quality monitoring terminals in fig. 3, the one-hop connection number of A is 3 (root node, B, D and E), the one-hop connection number of B is 5, and the one-hop connection number of C is 4, so that B is taken as the core node. The core node determines that the number of each layer can be increased appropriately, for example, when the number of the third layer nodes is more, E and F can be determined as the core nodes, so that the communication pressure of the core nodes of the layer is reduced, the redundancy of a communication link is increased, the communication reliability is improved, the node I in fig. 3 can normally forward commands from E and F, when E is abnormal, F can still provide commands to I, when I receives the commands forwarded by E and F, I judges whether the commands are consistent, if so, the commands received first are executed, and the same commands received later are not executed.
The number of core nodes can be increased according to the communication redundancy requirement, in fig. 3, { a, B, C } of the second layer can be all set as core nodes, and the root node (container management area) can issue commands and receive data through three paths.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410299080.9A CN118157317A (en) | 2024-03-15 | 2024-03-15 | A lightweight method for power quality monitoring and analysis |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202410299080.9A CN118157317A (en) | 2024-03-15 | 2024-03-15 | A lightweight method for power quality monitoring and analysis |
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| CN118157317A true CN118157317A (en) | 2024-06-07 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140298091A1 (en) * | 2013-04-01 | 2014-10-02 | Nebula, Inc. | Fault Tolerance for a Distributed Computing System |
| CN113095708A (en) * | 2021-04-23 | 2021-07-09 | 国网内蒙古东部电力有限公司通辽供电公司 | Power quality analysis system and method based on big data |
| CN115374823A (en) * | 2022-08-24 | 2022-11-22 | 国网湖北省电力有限公司恩施供电公司 | TLBO algorithm-based power quality disturbance classification method and system |
| CN115658673A (en) * | 2022-11-09 | 2023-01-31 | 国网甘肃省电力公司兰州供电公司 | An outlier detection method for power data quality based on big data modeling |
| CN118157302A (en) * | 2023-11-16 | 2024-06-07 | 云南电网有限责任公司文山供电局 | A power quality monitoring system and method thereof, and a communication method |
-
2024
- 2024-03-15 CN CN202410299080.9A patent/CN118157317A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140298091A1 (en) * | 2013-04-01 | 2014-10-02 | Nebula, Inc. | Fault Tolerance for a Distributed Computing System |
| CN113095708A (en) * | 2021-04-23 | 2021-07-09 | 国网内蒙古东部电力有限公司通辽供电公司 | Power quality analysis system and method based on big data |
| CN115374823A (en) * | 2022-08-24 | 2022-11-22 | 国网湖北省电力有限公司恩施供电公司 | TLBO algorithm-based power quality disturbance classification method and system |
| CN115658673A (en) * | 2022-11-09 | 2023-01-31 | 国网甘肃省电力公司兰州供电公司 | An outlier detection method for power data quality based on big data modeling |
| CN118157302A (en) * | 2023-11-16 | 2024-06-07 | 云南电网有限责任公司文山供电局 | A power quality monitoring system and method thereof, and a communication method |
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Application publication date: 20240607 |
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