CN112003374B - Wireless monitoring system for power quality - Google Patents
Wireless monitoring system for power quality Download PDFInfo
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- CN112003374B CN112003374B CN202010863978.6A CN202010863978A CN112003374B CN 112003374 B CN112003374 B CN 112003374B CN 202010863978 A CN202010863978 A CN 202010863978A CN 112003374 B CN112003374 B CN 112003374B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00002—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by monitoring
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00001—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by the display of information or by user interaction, e.g. supervisory control and data acquisition systems [SCADA] or graphical user interfaces [GUI]
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
- H02J13/00022—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using wireless data transmission
- H02J13/00026—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using wireless data transmission involving a local wireless network, e.g. Wi-Fi, ZigBee or Bluetooth
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/18—Self-organising networks, e.g. ad-hoc networks or sensor 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
- 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
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
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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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Signal Processing (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The invention discloses a power quality wireless monitoring system, which can realize high-efficiency analysis, recognition and early warning of power quality by setting a power quality analysis terminal and a plurality of power quality disturbance parameter acquisition nodes, automatically acquiring, processing and analyzing power quality disturbance parameters and uploading the parameters to a remote server, and simultaneously display the power quality disturbance parameters in a mode of a three-dimensional model of a power system, thereby realizing visual display of the operation process of the power system, facilitating the monitoring of the power quality at each power quality disturbance parameter acquisition node by a worker and timely obtaining the early warning prompt of the power quality.
Description
Technical Field
The invention relates to the field of power monitoring, in particular to a wireless power quality monitoring system.
Background
The electric power system has a large number of nonlinear, impact and fluctuating loads, such as high-power frequency conversion equipment and dragging devices, electrified railways, rectifying equipment in the electrochemical industry, induction heating furnaces, electric arc furnaces and the like, and the loads cause problems of waveform distortion (harmonic waves), voltage fluctuation, flicker, three-phase imbalance, asymmetry and the like of the power grid, so that the power quality of the power grid is seriously reduced. Meanwhile, precise electronic instruments controlled by a computer and a microprocessor are widely used in national economic enterprises, the sensitivity to power supply quality is higher and higher, and higher requirements are provided for the power quality, so that the power quality problem and the solution thereof gradually become the research hotspots. The method comprises the steps of firstly, accurately detecting and analyzing the power quality, measuring the power quality level of the power grid, analyzing and judging reasons causing various power quality problems, and providing a basis for improving the power quality.
Disclosure of Invention
The invention aims to provide a wireless power quality monitoring system which can visually and quickly identify power quality events.
In order to solve the above technical problem, the present invention provides a wireless power quality monitoring system, which includes: the system comprises a remote server, a power quality analysis terminal and a plurality of power quality disturbance parameter acquisition nodes, wherein the power quality analysis terminal is connected with the remote server;
each power quality disturbance parameter acquisition node is connected with a corresponding power quality analysis terminal in an ad hoc network mode through a Zigbee module to form an internal network; the power quality disturbance parameter acquisition node is used for transmitting the acquired power quality disturbance parameters to the power quality analysis terminal in a wireless mode through the internal network;
the electric energy quality analysis terminal is used for: storing the power quality disturbance parameters into a local relational database to record historical operation information of the power system; analyzing the power quality disturbance parameters by using a preset correction model and a preset classifier to obtain a power quality analysis result, and sending an early warning short message when the power quality analysis result falls into a preset early warning range; correspondingly displaying the power quality disturbance parameters in a three-dimensional model of the power system;
the electric power system three-dimensional model is constructed by taking an electric power system component layout diagram as a reference, and each electric energy quality disturbance parameter acquisition node is provided with a corresponding mark on the electric power system three-dimensional model according to the position.
Optionally, the power quality analysis terminal is further configured to: according to a preset processing rule, the electric energy quality disturbance parameter and an electric energy quality analysis result corresponding to the electric energy quality disturbance parameter are subjected to analysis, and processed data are sent to the remote server to be stored;
the remote server is also used for verifying the authority of the access user and providing corresponding data according to the authority of the access user.
Optionally, the power quality analysis terminal analyzes the power quality disturbance parameter by using a preset correction model and a preset classifier to obtain a power quality analysis result, and the method specifically includes:
the electric energy quality analysis terminal constructs a generalized morphological filter of an adaptive LMS algorithm based on mathematical morphology and carries out denoising processing on the electric energy quality disturbance parameters;
the electric energy quality analysis terminal corrects the electric energy quality disturbance parameters after denoising processing based on the error model of each electric energy quality disturbance parameter acquisition node;
the electric energy quality analysis terminal extracts the feature vectors of the corrected electric energy quality disturbance parameters based on the service flow template, and expresses, classifies and identifies the electric energy quality events by utilizing an equidistant feature mapping classifier to obtain an electric energy quality event identification result.
Optionally, the power quality analysis terminal is further configured to: calling a prediction script established based on a statistical regression algorithm and a data driving algorithm, and generating short-term power quality prediction information according to the corrected power quality disturbance parameters; and performing optimization calculation on the power quality disturbance parameters, the power quality analysis results, the power quality event recognition results and the short-term power quality forecast information by using a multi-group differential evolution algorithm to obtain parameters of a power quality optimization strategy.
Optionally, the power quality analysis terminal is further configured to: and obviously marking the power quality disturbance parameter acquisition node where the power quality event identification result is located on the power system three-dimensional model.
Optionally, each power quality disturbance parameter acquisition node is provided with a positioning module, and is configured to feed back positioning information of the power quality disturbance parameter acquisition node to the power quality analysis terminal in real time.
Optionally, the positioning module is specifically a beidou module.
Optionally, the power quality analysis terminal is further configured to: and storing the link information of the electric energy quality disturbance parameter acquisition node and the historical operation information, and placing a hyperlink corresponding to the link information at a corresponding mark in the three-dimensional model of the electric power system.
According to the wireless power quality monitoring system, the power quality analysis terminal and the plurality of power quality disturbance parameter acquisition nodes are arranged, the power quality disturbance parameters can be automatically acquired, processed and analyzed and uploaded to the remote server, high-efficiency analysis, recognition and early warning of the power quality are achieved, meanwhile, the power quality disturbance parameters are displayed in a mode of a three-dimensional model of the power system, visual display of the operation process of the power system is achieved, workers can conveniently monitor the power quality of the power quality disturbance parameter acquisition nodes, and early warning prompts of the power quality are timely obtained.
Drawings
In order to more clearly illustrate the embodiments or technical solutions of the present invention, the drawings 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 only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a wireless power quality monitoring system according to an embodiment of the present invention;
wherein 101 is a remote server, 102 is a power quality analysis terminal, 103 is a power quality disturbance parameter acquisition node, 104 is a wireless communicator, and 105 is a human-computer interaction device.
Detailed Description
The core of the invention is to provide a wireless power quality monitoring system which can intuitively and quickly realize the identification of power quality events.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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 invention.
Fig. 1 is a schematic structural diagram of a wireless power quality monitoring system according to an embodiment of the present invention.
As shown in fig. 1, a wireless power quality monitoring system provided in an embodiment of the present invention includes: the system comprises a remote server 101, a power quality analysis terminal 102 and a plurality of power quality disturbance parameter acquisition nodes 103, wherein the power quality analysis terminal 102 is connected with the remote server 101;
each power quality disturbance parameter acquisition node 103 is connected with a corresponding power quality analysis terminal 102 in an ad hoc network manner through a Zigbee module to form an internal network; the power quality disturbance parameter acquisition node 103 is configured to wirelessly transmit the acquired power quality disturbance parameters to the power quality analysis terminal 102 via an internal network;
the power quality analysis terminal 102 is configured to: storing the power quality disturbance parameters into a local relational database to record historical operation information of the power system; analyzing the power quality disturbance parameters by using a preset correction model and a preset classifier to obtain a power quality analysis result, and sending an early warning short message when the power quality analysis result falls into a preset early warning range; correspondingly displaying the power quality disturbance parameters in the three-dimensional model of the power system;
the three-dimensional model of the power system is constructed by taking a component layout diagram of the power system as a reference, and each power quality disturbance parameter acquisition node 103 is provided with a corresponding mark on the three-dimensional model of the power system according to the position.
In specific implementation, after each power quality disturbance parameter acquisition node 103 and the corresponding power quality analysis terminal 102 are connected in an ad hoc network manner through the Zigbee module to form an effective internal network, the power quality analysis terminal 102 is in wireless communication with the remote server 101 through the wireless communicator 104, so as to upload power quality disturbance parameters and receive remote control instructions.
Each power quality disturbance parameter acquisition node 103 may be provided with a positioning module, and configured to feed back positioning information of the power quality disturbance parameter acquisition node 103 to the power quality analysis terminal 102 in real time. The positioning module can specifically adopt a Beidou module, a GPS module and the like.
The power quality analysis terminal 102 carries a data processing system for implementing functions, and the data processing system may include: the device comprises a data local storage module, an electric energy quality analysis module, a GSM early warning module and a visualization module.
The data local storage module is used for controlling the power quality disturbance parameters to be stored in a local relational database so as to record historical operation information of the power system, and specifically, the power quality disturbance parameters can be stored in the local MySQL database by adopting a MySQL tool package in python.
And the power quality analysis module controls the preset correction model and the preset classifier to analyze the power quality disturbance parameters to obtain a power quality analysis result.
The power quality analysis module can further comprise a power quality disturbance parameter denoising module, a power quality disturbance parameter correction module and a power quality event identification module. The power quality analysis terminal 102 analyzes the power quality disturbance parameter by using a preset correction model and a preset classifier to obtain a power quality analysis result, which specifically includes: the electric energy quality analysis terminal 102 (realized by an electric energy quality disturbance parameter denoising module) constructs a generalized morphological filter of an adaptive LMS algorithm based on mathematical morphology, and denoises the electric energy quality disturbance parameters; the power quality analysis terminal 102 corrects the denoised power quality disturbance parameters based on the error model of each power quality disturbance parameter acquisition node 103 (realized by a power quality disturbance parameter correction module); the power quality analysis terminal 102 (implemented by the power quality event recognition module) extracts feature vectors of the corrected power quality disturbance parameters (the frequency, amplitude and other feature parameters of each classification in a single or multiple steady state, transient state and transient power disturbance event in the waveform of the power system, and extracts mode feature vectors with clear physical significance and specific indexes) based on the service flow template, and expresses, classifies and recognizes the power quality events (including voltage sag, short-time power outage, harmonic, inter-harmonic, frequency offset, voltage fluctuation and the like) by using an equidistant feature mapping classifier to obtain a power quality event recognition result.
The power quality analysis module can also comprise a data prediction analysis module and a power quality management decision module. Correspondingly, the power quality analysis terminal 102 is further configured to: calling a prediction script established based on a statistical regression algorithm and a data driving algorithm (realized by a data prediction analysis module), and generating short-term power quality prediction information according to the corrected power quality disturbance parameters; and (realized by a power quality management decision module) optimizing and calculating the power quality disturbance parameters, the power quality analysis results, the power quality event recognition results and the short-term power quality forecast information by utilizing a multi-group differential evolution algorithm to obtain parameters of a power quality optimization strategy.
And the GSM early warning module controls to send an early warning short message to a specified position when the electric energy quality analysis result falls into a preset early warning range. The power quality analysis terminal 102 may specifically send the early warning message to a terminal device of a worker.
The visualization module constructs a three-dimensional model of the power system by taking the component layout diagram of the power system as a reference, marks the power quality disturbance parameter acquisition nodes 103 on the obtained three-dimensional model of the power system according to the positions of the power quality disturbance parameter acquisition nodes 103, and simultaneously displays the power quality disturbance parameters acquired by the power quality disturbance parameter acquisition nodes 103 at corresponding marks in real time.
The visualization module may further enable tagging of power quality events. Correspondingly, the power quality analysis terminal 102 is further configured to: and obviously marking the power quality disturbance parameter acquisition node 103 where the power quality event identification result is located on the three-dimensional model of the power system, and if the power quality disturbance parameter acquisition node 103 where the power quality event identification result is located is circled out, the checking of the power quality event by the staff is further facilitated.
According to the power quality wireless monitoring system provided by the embodiment of the invention, the power quality analysis terminal and the plurality of power quality disturbance parameter acquisition nodes are arranged, so that the power quality can be automatically acquired, processed and analyzed based on the power quality disturbance parameters and uploaded to the remote server, the high-efficiency analysis, identification and early warning of the power quality are realized, meanwhile, the power quality disturbance parameters are displayed in a mode of a three-dimensional model of the power system, the visual display of the operation process of the power system is realized, the monitoring of the power quality at each power quality disturbance parameter acquisition node by a worker is facilitated, and the early warning prompt of the power quality is obtained in time.
On the basis of the foregoing embodiment, in the wireless power quality monitoring system provided in the embodiment of the present invention, the power quality analysis terminal 102 is further configured to: and analyzing the power quality disturbance parameters and the power quality analysis results corresponding to the power quality disturbance parameters according to preset processing rules, and sending the processed data to the remote server 101 for storage. Specifically, the power quality analysis terminal 102 typesets the power quality disturbance parameters and the power quality analysis results corresponding to the power quality disturbance parameters according to a preset template, and then sends the typeset results to the remote server 101 for storage.
The remote server 101 is also used for verifying the authority of the access user and providing corresponding data according to the authority of the access user. The user logs in the remote server 101 through the user name and the password, and after the user name and the password are verified by the remote server 101, the access control authority to the wireless power quality monitoring data is based on the corresponding access control authority.
On the basis of the foregoing embodiments, the wireless power quality monitoring system provided in the embodiments of the present invention may further include a human-computer interaction device 105 connected to the power quality analysis terminal 102, and configured to display a three-dimensional model of the power system and receive settings of a worker. A far-and-near monitoring interaction mechanism is formed by the man-machine interaction device 105 and the remote server 101.
On the basis of the foregoing embodiment, in the wireless power quality monitoring system provided in the embodiment of the present invention, the power quality analysis terminal 102 is further configured to: and storing the link information of the power quality disturbance parameter acquisition node 103 and the historical operation information, and placing a hyperlink corresponding to the link information at a corresponding mark in the three-dimensional model of the power system.
By establishing the link information of the power quality disturbance parameter acquisition node 103 and the historical operation information and placing the hyperlink corresponding to the link information at the corresponding mark in the three-dimensional model of the power system, the method is helpful for the working personnel to check the historical operation information collected by each power quality disturbance parameter acquisition node 103 through the three-dimensional model of the power system.
The above provides a detailed description of the wireless power quality monitoring system provided by the present invention. The embodiments are described in a progressive manner in the specification, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
It is further noted that, in the present specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Claims (3)
1. A wireless monitoring system for power quality, comprising: the system comprises a remote server, a power quality analysis terminal and a plurality of power quality disturbance parameter acquisition nodes, wherein the power quality analysis terminal is connected with the remote server;
each power quality disturbance parameter acquisition node is connected with a corresponding power quality analysis terminal in an ad hoc network mode through a Zigbee module to form an internal network; the power quality disturbance parameter acquisition node is used for transmitting the acquired power quality disturbance parameters to the power quality analysis terminal in a wireless mode through the internal network;
the electric energy quality analysis terminal is used for: storing the power quality disturbance parameters into a local relational database to record historical operation information of the power system; analyzing the power quality disturbance parameters by using a preset correction model and a preset classifier to obtain a power quality analysis result, and sending an early warning short message when the power quality analysis result falls into a preset early warning range; correspondingly displaying the power quality disturbance parameters in a three-dimensional model of the power system;
the electric power system three-dimensional model is constructed by taking an electric power system component layout diagram as a reference, and each electric energy quality disturbance parameter acquisition node is provided with a corresponding mark on the electric power system three-dimensional model according to the position;
the electric energy quality analysis terminal analyzes the electric energy quality disturbance parameters by utilizing a preset correction model and a preset classifier to obtain an electric energy quality analysis result, and the electric energy quality analysis method specifically comprises the following steps:
the electric energy quality analysis terminal constructs a generalized morphological filter of an adaptive LMS algorithm based on mathematical morphology and carries out denoising processing on the electric energy quality disturbance parameters;
the electric energy quality analysis terminal corrects the electric energy quality disturbance parameters after denoising processing based on the error model of each electric energy quality disturbance parameter acquisition node;
the electric energy quality analysis terminal extracts the feature vector of the corrected electric energy quality disturbance parameter based on the service flow template, and expresses, classifies and identifies the electric energy quality event by utilizing an equidistant feature mapping classifier to obtain an electric energy quality event identification result;
the feature vector of the corrected power quality disturbance parameter is extracted from the feature parameter, and the feature parameter comprises the frequency and amplitude of each classification in single or multiple steady state, transient state and transient power disturbance events in the waveform of the power system; the power quality event is at least one of voltage sag, short-time power failure, harmonic wave, inter-harmonic wave, frequency offset and voltage fluctuation;
the power quality analysis terminal is further used for: obviously marking the power quality disturbance parameter acquisition node where the power quality event identification result is located on the power system three-dimensional model;
each power quality disturbance parameter acquisition node is provided with a positioning module and used for feeding back positioning information of the power quality disturbance parameter acquisition node to the power quality analysis terminal in real time; the positioning module is specifically a Beidou module or a GPS module;
the power quality analysis terminal is further used for: and storing the link information of the electric energy quality disturbance parameter acquisition node and the historical operation information, and placing a hyperlink corresponding to the link information at a corresponding mark in the three-dimensional model of the electric power system.
2. The wireless power quality monitoring system of claim 1, wherein the power quality analysis terminal is further configured to: according to a preset processing rule, the electric energy quality disturbance parameter and an electric energy quality analysis result corresponding to the electric energy quality disturbance parameter are subjected to analysis, and processed data are sent to the remote server to be stored;
the remote server is also used for verifying the authority of the access user and providing corresponding data according to the authority of the access user.
3. The wireless power quality monitoring system of claim 1, wherein the power quality analysis terminal is further configured to: calling a prediction script established based on a statistical regression algorithm and a data driving algorithm, and generating short-term power quality prediction information according to the corrected power quality disturbance parameters; and performing optimization calculation on the power quality disturbance parameters, the power quality analysis results, the power quality event recognition results and the short-term power quality forecast information by using a multi-group differential evolution algorithm to obtain parameters of a power quality optimization strategy.
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