CN113552449B - Four-level protection safety electricity consumption monitoring system and monitoring method - Google Patents
Four-level protection safety electricity consumption monitoring system and monitoring method Download PDFInfo
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Abstract
The invention provides a four-level protection safety electricity consumption monitoring system, which comprises a safety electricity consumption monitoring terminal and an edge computing gateway; the safety electricity utilization monitoring terminal comprises a first communication module, and the edge computing gateway comprises an equipment side communication module and a platform side communication module; the signal input and output end of the first communication module is in butt joint with the signal output and input end of the equipment side communication module, and the signal input end of the equipment side communication module is connected with the signal output end of the platform side communication module. The method for monitoring the safe electricity utilization specifically comprises the following steps: 1. issuing a safety electricity consumption monitoring instruction to an edge computing gateway; 2. collecting electrical parameters in real time; 3. starting a fault wave recording module to carry out local wave recording; 4. uploading fault waveform data to an edge computing gateway; 5. and identifying the fault type. The advantages are that: the invention can effectively improve the electricity utilization safety protection capability of the electricity distribution side, and prevent or reduce the occurrence probability of potential electricity utilization hazards.
Description
Technical Field
The invention relates to a four-level protection safety electricity consumption monitoring system and a monitoring method, and belongs to the technical field of safety electricity consumption.
Background
The problem of power distribution safety protection is always a heavy duty in the power distribution link, and along with the continuous expansion of power demand and power distribution range, how to ensure the safety, reliability and high efficiency of the power distribution process becomes a highly important problem for power supply enterprises and power users; the safety monitoring of the power distribution and utilization links is carried out, the visualization and the transparency of network operation data become powerful means for solving the problem, in the process, the power distribution and utilization network is required to be classified and partitioned, the comprehensive monitoring of the power distribution and utilization interval lines is realized, a complete monitoring system of cloud-pipe-side-end is formed, the potential safety hazards in the process of operating the lines are accurately positioned in time, the transient faults are prevented from evolving into permanent faults, the power supply reliability and the operation and maintenance management capability of a power supply enterprise are improved, and the power utilization safety of power users is ensured.
The power distribution link mainly comprises the following parts: the power distribution network, the branch box, the power taking box and the power taking socket have the advantages that the whole link span is longer, the range is wider, the hidden trouble investigation and fault maintenance work difficulty is larger, and the topology relation between power distribution and power utilization links is unclear and inaccurate due to the fact that lines are complex and management levels are behind a lot of old the city proper and areas just outside its gates cells in a city, the traditional safety power utilization protection means often have a very remarkable effect, and the problems are solved for the safety protection work of the power distribution and utilization links.
In addition, with the development of intelligent power distribution and communication technology, new requirements are put forward on the acquisition and transmission of power distribution monitoring data, and the real-time performance and accuracy of power distribution monitoring data are guaranteed to be important aspects of safety power utilization protection.
Disclosure of Invention
The invention provides a four-level protection safety electricity consumption monitoring system and a monitoring method, and aims to solve the problem that hidden trouble faults cannot be timely checked in an electricity distribution link.
The technical solution of the invention is as follows: a four-level protection safety electricity consumption monitoring system comprises a safety electricity consumption monitoring terminal and an edge computing gateway; the safety electricity utilization monitoring terminal comprises a first communication module, the edge computing gateway comprises a second communication module, and the second communication module comprises an equipment side communication module and a platform side communication module; the signal input and output end of the first communication module is in butt joint with the signal output and input end of the equipment side communication module, and the signal input end of the equipment side communication module is connected with the signal output end of the platform side communication module.
Further, the four-stage protection safety electricity consumption monitoring system further comprises a cloud platform, and a signal input and output end of the cloud platform is in butt joint with a signal input and output end of the platform side communication module.
Further, the safety electricity consumption monitoring terminal further comprises a signal acquisition module, a fault detection module, a fault wave recording module and a time synchronization module, wherein a signal output end of the signal acquisition module is connected with a signal input end of the fault detection module, a signal output end of the fault detection module is connected with a first signal input end of the fault wave recording module, a second signal input end of the fault wave recording module is connected with a signal output end of the time synchronization module, a signal output end of the fault wave recording module is connected with a signal input end of the first communication module, a first signal output end of the first communication module is connected with a signal input end of the signal acquisition module, and a second signal output end of the first communication module is connected with a signal input end of the time synchronization module.
Further, the edge computing gateway further comprises a storage module, a data processing and checking module and a fault identification module, wherein a signal output end of the storage module is connected with a signal input end of the data processing and checking module, a signal output end of the data processing and checking module is connected with a signal input end of the fault identification module, a signal output end of the fault identification module is connected with a signal input end of the platform side communication module, and a signal output end of the equipment side communication module is connected with a signal input end of the storage module.
Further, the safety electricity consumption monitoring terminals are a plurality of, the safety electricity consumption monitoring terminals are respectively arranged on the electricity distribution protection side of the power distribution room, the branch box, the power distribution box and the electricity taking socket, and each safety electricity consumption monitoring terminal is in real-time network communication with the edge computing gateway through the first communication module.
Further, the plurality of safety electricity utilization monitoring terminals communicate through the respective first communication modules.
A method for monitoring safety electricity utilization by utilizing a four-level protection safety electricity utilization monitoring system specifically comprises the following steps:
1. The cloud platform starts a four-level protection safety electricity monitoring system and issues a safety electricity monitoring instruction to the edge computing gateway;
2. The edge computing gateway and the safety electricity consumption monitoring terminals complete communication, and each safety electricity consumption monitoring terminal Mi starts to acquire electric parameters in real time in a corresponding four-level electricity consumption monitoring interval Lj through a signal acquisition module; i= {1,2, … …, P }, i is the number of the safety electricity monitoring terminals, and P is the total number of the safety electricity monitoring terminals; j= {1,2, … …, Q }, j is the number of the four-stage power consumption monitoring section, Q is the total number of monitoring line sections of the four-stage power consumption monitoring section;
3. The method comprises the steps that a safety electricity consumption monitoring terminal Mi collects and checks current sampling time t and electric parameters of a front sampling time interval (t-1) and a rear sampling time interval (t+1) through a fault detection module, when an I Ui (t+1) -Ui (t) | > Ui valve or an I Ii (t+1) -Ii (t) | > Ii valve is identified, the fault electric parameters are detected, a fault wave recording module is started to carry out local wave recording, wherein Ui (t) is the voltage effective value calculated by the safety electricity consumption monitoring terminal Mi when the sampling time t, and Ii (t) is the current effective value calculated by the safety electricity consumption monitoring terminal Mi when the sampling time t is;
4. uploading corresponding fault waveform data and fault node information obtained through local wave recording to an edge computing gateway;
5. The edge computing gateway receives fault waveform data and fault node information, the integrity and the correctness of the fault waveform data are verified through a data processing and checking module in the edge computing gateway, and then the fault type is identified through a fault identification module; the fault waveform data includes a fault voltage waveform and a fault current waveform.
Further, the electrical parameters include a voltage parameter and a current parameter.
Further, the local wave recording specifically includes: on the basis of a local area network, the consistency of time marks is ensured through a time setting module in the safe electricity consumption monitoring terminal, and when the safe electricity consumption monitoring terminal issues a wave recording instruction, the safe electricity consumption monitoring terminal which detects a fault electric parameter simultaneously starts the fault wave recording module to carry out local wave recording, and the voltage waveform and the current waveform under the current time mark are recorded.
Further, the method for monitoring the safe electricity utilization by utilizing the four-level protection safe electricity utilization monitoring system specifically further comprises a step 6 of uploading a fault type identification result to the cloud platform.
Further, the method for monitoring the safe electricity utilization by utilizing the four-level protection safe electricity utilization monitoring system specifically further comprises the step 7 of transmitting the fault type identification result and the fault node position information to the operation and maintenance management system by the cloud platform to guide the hidden trouble management and removal.
The edge computing gateway receives fault waveform data and fault node information, the integrity and the correctness of the fault waveform data are verified through a data processing and checking module in the edge computing gateway, then the fault type is identified through a fault identification module, and the identification process specifically comprises the following steps:
5-1), voltage and current comparison is carried out: if Ui (t+1) < Ui (t) and Ui (t) -Ui (t+1) < Ui valve, and simultaneously Ii (t+1) > Ii (t) and Ii (t+1) -Ii (t) > Ii valve, identifying the fault type as parallel arc, and if the corresponding condition is not satisfied, performing voltage comparison;
5-2), performing voltage comparison: if Ui (t+1) < Ui (t) and Ui (t) -Ui (t+1) > Ui valve, identifying the fault type as a series arc, and if the corresponding condition is not met, comparing the currents;
5-3), current comparison: if Ii (t+1) -Ii (t) > Ii valve, identifying the fault type as "line overload"; if Ii (t+1) < Ii (t) and Ii (t) -Ii (t+1) > Ii valve, the fault type is identified as "leakage current"; if the current comparison does not belong to the two cases, the fault type is identified as an unknown fault.
Further, the Ui valve and the Ii valve are respectively a set voltage safety threshold and a set current safety threshold; the thresholds Ui and Ii can be modified locally in an offline manner or configured online by a user through a cloud platform.
The beneficial technical effects of the invention are as follows:
The automatic positioning device can automatically position and identify the accurate positions of potential safety hazards such as series-parallel arc, leakage current, overload and the like, has high fault type identification precision and high fault position positioning precision, can effectively improve the electricity utilization safety protection capability of the electricity distribution side, and plays a role in preventing or reducing the occurrence probability of the potential electricity utilization hazards.
Drawings
FIG. 1 is a schematic diagram of an implementation of a four-stage protective safety electricity monitoring system according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a four-stage protection safety electricity monitoring system according to an embodiment of the present invention.
FIG. 3 is a flow chart of an implementation of a four-stage protective safety electricity monitoring system according to an embodiment of the present invention.
Detailed Description
A four-level protection safety electricity consumption monitoring system comprises a safety electricity consumption monitoring terminal and an edge computing gateway; the safety electricity utilization monitoring terminal comprises a first communication module, the edge computing gateway comprises a second communication module, and the second communication module comprises an equipment side communication module and a platform side communication module; the signal input and output end of the first communication module is in butt joint with the signal output and input end of the equipment side communication module, and the signal input end of the equipment side communication module is connected with the signal output end of the platform side communication module.
The four-level protection safety electricity monitoring system further comprises a cloud platform, wherein a signal input and output end of the cloud platform is in butt joint with a signal input and output end of the platform side communication module; the cloud platform is used for system information interaction management.
The safe electricity consumption monitoring terminal further comprises a signal acquisition module, a fault detection module, a fault wave recording module and a time synchronization module, wherein a signal output end of the signal acquisition module is connected with a signal input end of the fault detection module, a signal output end of the fault detection module is connected with a first signal input end of the fault wave recording module, a second signal input end of the fault wave recording module is connected with a signal output end of the time synchronization module, a signal output end of the fault wave recording module is connected with a signal input end of the first communication module, a first signal output end of the first communication module is connected with a signal input end of the signal acquisition module, and a second signal output end of the first communication module is connected with a signal input end of the time synchronization module.
The edge computing gateway further comprises a storage module, a data processing and checking module and a fault identification module, wherein the signal output end of the storage module is connected with the signal input end of the data processing and checking module, the signal output end of the data processing and checking module is connected with the signal input end of the fault identification module, the signal output end of the fault identification module is connected with the signal input end of the platform side communication module, and the signal output end of the equipment side communication module is connected with the signal input end of the storage module.
The power distribution system comprises a plurality of safety power utilization monitoring terminals, wherein the plurality of safety power utilization monitoring terminals are respectively arranged on power distribution protection sides of a power distribution room, a branch box, a power distribution box and a power taking socket; when the system works, each safety electricity consumption monitoring terminal carries out real-time network communication with the equipment side communication module in the edge computing gateway through the first communication module, the edge computing gateway carries out real-time network communication with the cloud platform through the platform side communication module, and the real-time network communication can adopt a wired or wireless communication mode to realize a communication function.
The plurality of safety electricity utilization monitoring terminals are communicated in real time through respective first communication modules, network time synchronization is realized among time synchronization modules in the safety electricity utilization monitoring terminals, and the first communication modules are preferably communicated in real time in a wireless communication mode; the safety electricity consumption monitoring terminals detect fault voltage and current waveforms through the fault detection modules, communicate with adjacent safety electricity consumption monitoring terminals and time-align to form a unified time scale through the corresponding first communication modules and time-align modules, and each safety electricity consumption monitoring terminal transmits a wave recording instruction to the corresponding fault wave recording module to start the fault wave recording module to carry out local wave recording, and the wave recording result is uploaded to the edge computing gateway; the edge computing gateway performs computing comparison on the received fault waveform data according to the fault identification module; on the basis of a local area network, the consistency of time marks is ensured through a time setting module in the safe electricity consumption monitoring terminal, and when the safe electricity consumption monitoring terminal issues a wave recording instruction, the safe electricity consumption monitoring terminal which detects a fault electric parameter simultaneously starts the wave recording module to carry out local wave recording, and the voltage waveform and the current waveform under the current time mark are recorded.
The signal acquisition module acquires and processes the voltage and current signals and records the effective values of the voltage and current signals; the fault detection module is used for identifying and detecting fault voltage and current through a detection algorithm; the fault wave recording module is used for communicating with a safe electricity consumption monitoring terminal for detecting disturbance in a monitoring network in a wireless communication mode after detecting the occurrence of a fault, unifying time marks through the time setting module and simultaneously starting fault voltage and current waveform recording; the storage module is in charge of receiving fault waveform data uploaded by the safety electricity utilization monitoring terminal; each data processing and checking module is used for preprocessing the stored fault waveform data and checking the time accuracy and the integrity of the wave recording waveform; the fault identification module is used for judging the fault type of each fault waveform through a fault identification algorithm and returning a judging result to the cloud platform through the communication module at the cloud platform side.
The safety electricity utilization monitoring terminal is configured at the outlet end of the distribution electric line; the edge computing gateway and the cloud platform are both configured on an area protection system network, and the cloud platform is used for system information interaction management.
The signal acquisition module in the safety electricity consumption monitoring terminal preferably adopts an ADC acquisition module; the fault detection module preferably adopts a DSP analysis module; the fault wave recording module preferably adopts an MCU unit; the first communication module in the safety electricity consumption monitoring terminal and the equipment side communication module in the edge computing gateway are both preferably adopting an RS485 communication protocol; the platform side communication module preferably adopts a 4G communication protocol; the storage module preferably adopts an SD card storage mode; the data processing correction module and the fault identification module are both preferably SOC processing units.
A method for monitoring safety electricity utilization by utilizing a four-level protection safety electricity utilization monitoring system specifically comprises the following steps:
1. The cloud platform starts a four-level protection safety electricity monitoring system and issues a safety electricity monitoring instruction to the edge computing gateway;
2. The safety electricity utilization monitoring terminal Mi and the edge computing gateway complete communication, and electric parameters are collected in real time in a four-level electricity utilization monitoring interval Lj through a signal collection module, wherein the electric parameters comprise voltage parameters and current parameters; i= {1,2, … …, P } is the number of the safety electricity monitoring terminals, and P is the total number of the safety electricity monitoring terminals; j= {1,2, … …, Q } is the number of the four-stage power consumption monitoring section, Q is the total number of monitoring line sections of the four-stage power consumption monitoring section;
3. The method comprises the steps that a safety electricity consumption monitoring terminal Mi collects and checks current sampling time t and electric parameters of a front sampling time interval (t-1) and a rear sampling time interval (t+1) through a fault detection module in a parameter comparison mode, a threshold comparison mode and the like, when an I Ui (t+1) -Ui (t) valve or an I Ii (t+1) -Ii (t) valve is identified, the fault electric parameters are detected, a fault wave recording module is started to carry out local wave recording, wherein Ui (t) is a voltage effective value collected by the safety electricity consumption monitoring terminal Mi when the sampling time t, and Ii (t) is a current effective value collected by the safety electricity consumption monitoring terminal Mi when the sampling time t is detected;
4. The local wave recording function ensures the consistency of time marks on the basis of local area network time synchronization, and when the safety electricity monitoring terminal issues a wave recording instruction, the safety electricity monitoring terminal which detects the fault electric parameters simultaneously starts the fault wave recording module to carry out local wave recording, records the voltage waveform and the current waveform under the current time mark, and uploads corresponding fault waveform data and fault node information to the edge computing gateway;
5. The edge computing gateway receives fault waveform data and fault node information, the integrity and the correctness of the fault waveform data are verified through a data processing and checking module in the edge computing gateway, and then the fault type is identified through a fault identification module; the fault waveform data comprises a fault voltage waveform and a fault current waveform;
6. and the edge computing gateway counts the information of each fault node according to the uploading data condition of each safety electricity utilization monitoring terminal, gathers the feedback result of the fault identification module, and uploads summarized information to the cloud platform, wherein the summarized information comprises fault type information.
The edge computing gateway analyzes and processes the received fault voltage and current waveforms, and identifies the type of series arc faults through the comparison of the fault voltage and steady-state voltage; the parallel arc fault type is identified through the comparison of fault voltage and current with steady-state voltage and current; comparing the collected currents through adjacent safety electricity utilization monitoring terminals to determine the fault type of leakage current; identifying the overload fault type through the fact that the current value exceeds a safety threshold value; and carrying out disturbance sequencing on all the safety power consumption monitoring terminals in the four-level safety monitoring interval, selecting the largest and the next largest disturbance devices, determining the position of the fault interval, and uploading the fault identification result and the fault interval positioning result to a cloud platform, wherein the specific flow comprises the following steps:
1): the fault type identification method specifically comprises the following steps:
1-1): performing voltage and current comparison, if Ui (t+1) < Ui (t) and Ui (t) -Ui (t+1) < Ui valve, and simultaneously Ii (t+1) > Ii (t) and Ii (t) -Ii (t) > Ii valve, identifying that the fault type is parallel arc, and entering step 2), and if the corresponding condition is not met, performing voltage comparison;
1-2): performing voltage comparison, if Ui (t+1) < Ui (t) and Ui (t) -Ui (t+1) > Ui valve, identifying that the fault type is series arc, entering step 2), and if the corresponding condition is not met, performing current comparison;
1-3): comparing currents, and if Ii (t+1) -Ii (t) > Ii valve, identifying that the fault type is line overload, and entering step 2; if Ii (t+1) < Ii (t) and Ii (t) -Ii (t+1) > Ii valve, identifying that the fault type is 'leakage current', entering step 2), otherwise, returning 'unknown fault' type information, and entering step 2);
2): and according to the uploading data condition of each safety electricity utilization monitoring terminal, counting each fault node information, summarizing the feedback result, and uploading summarized information to the cloud platform, wherein the summarized information comprises fault type information.
The Ui valve and the Ii valve are respectively a voltage safety threshold value and a current safety threshold value which are set by a safety electricity utilization monitoring terminal Mi; the Ui valve and the Ii valve can be locally modified offline, and can be configured online by a user through a cloud platform.
The cloud platform receives the fault identification result and the fault interval identification result, and transmits information to operation and maintenance processing personnel for timely hidden trouble shooting and fault processing.
The further technical scheme is as follows: and each monitoring section of the four-level protection section is provided with a safety electricity utilization monitoring terminal, and the global safety electricity utilization monitoring terminal is provided with an edge computing gateway.
Each safety electricity utilization monitoring terminal can achieve a communication function in a wired or wireless mode, and the edge computing gateway can achieve communication in a wireless or wired mode.
The system comprises a safety electricity consumption monitoring terminal configured at an outlet end of a distribution and utilization electric line, an edge computing gateway configured in an area protection system network and a cloud platform for system information interaction management, wherein the safety electricity consumption monitoring terminal is installed at four-level distribution and utilization sides such as a distribution room, a branch box, a distribution box and an electricity taking socket, electric parameters such as voltage and current in the line are collected, and accurate positions of potential safety hazards such as series-parallel connection arcs, leakage currents and overload can be automatically positioned and identified in the edge computing gateway through voltage comparison and current characteristic extraction.
Example 1
A four-level protection safety electricity consumption monitoring system is shown in figure 1, wherein a switch is used as a boundary, and a distribution network topological structure is divided into four layers according to the control switch layer, namely a distribution room, a branch box, a distribution box and an electricity taking socket; a plurality of safety electricity utilization monitoring terminals are required to be installed in the four-layer structure; an edge computing gateway is required to be configured in the four-level protection safety electricity consumption monitoring system, and a monitoring cloud platform is deployed; the safety electricity utilization monitoring terminal and the edge computing gateway are respectively provided with a wired and/or wireless communication module.
The safe electricity consumption monitoring terminal further comprises a signal acquisition module, a fault detection module, a fault wave recording module and a time setting module, and each edge computing gateway further comprises a signal storage module, a data processing and checking module and a fault identification module.
The four-stage protection safety electricity consumption monitoring system disclosed by the embodiment has the following characteristics:
1. under the condition that each component has a communication function, installing a plurality of safety electricity utilization monitoring terminals on each line section of a four-level protection area; installing an edge computing terminal in the four-level protection area, and deploying a monitoring cloud platform;
2. The signal acquisition module in the safety electricity utilization monitoring terminal adopts an ADC acquisition module; the fault detection module adopts a DSP analysis module; the fault wave recording module adopts an MCU unit; the communication module adopts an RS485 communication protocol;
3. The device side communication module in the edge computing gateway adopts an RS485 communication protocol, and the platform side communication module adopts a 4G communication protocol; the storage module adopts the SD card storage mode; the data processing correction module and the fault identification module both adopt SOC processing units;
4. Each safety electricity utilization monitoring terminal has the functions of parameter acquisition, fault detection, fault wave recording and the like, and the signal acquisition module is used for processing voltage and current signals and recording the effective values of the voltage and current signals; the fault detection module collects and corrects the current sampling time t and the electric parameters of the previous and subsequent sampling time intervals (t-1) and (t+1), and when the valve of the valve I Ui (t+1) -Ui (t) I > Ui and the valve of the valve I Ii (t+1) -Ii (t) I > Ii are identified, the fault occurrence can be judged; the fault wave recording module can record waves with other safety electricity monitoring terminals in a time through a local communication mode after fault data are detected;
5. the edge computing gateway comprises a storage module, a data processing and checking module and a fault identification module, can identify the fault type of the received fault waveform and comprises the following specific processes:
Step1：
Case1: comparing voltage and current, if Ui (t+1) < Ui (t) and Ui (t) -Ui (t+1) < Ui valve, ii (t+1) > Ii (t) and Ii (t+1) -Ii (t) > Ii valve, identifying that the fault type is parallel arc, and entering Step2;
Case2: performing voltage comparison, and if Ui (t+1) < Ui (t) and Ui (t) -Ui (t+1) > Ui valve, identifying that the fault type is series arc, and entering Step2;
Case3: comparing currents, if Ii (t+1) -Ii (t) > Ii valve, identifying that the fault type is line overload, and entering Step2;
Case4: comparing currents, if Ii (t+1) < Ii (t) and Ii (t) -Ii (t+1) > Ii valve, identifying that the fault type is leakage current, entering Step2, otherwise, returning unknown fault type information, and entering Step2;
Step2: and according to the uploading data condition of each safety electricity utilization monitoring terminal, counting the information of each fault node, summarizing the feedback result of the calculation unit, and uploading the summarized information to the cloud platform.
During monitoring, the cloud platform sends monitoring instructions to a four-level protection safety electricity monitoring system, and the safety electricity monitoring terminals in each protection zone monitor voltage and current data of the operation section in real time; after the fault detection module detects that a fault occurs, triggering the fault wave recording module to start a wave recording function, and uploading fault waveform data to an edge computing gateway; the fault identification module of the edge computing gateway carries out calculation comparison on the received fault waveform data according to the fault type characteristics, identifies the fault type, combines fault node information and uploads the fault node information to the cloud platform; the cloud platform receives the fault node information, determines a fault section through comparison with an actual topological network, gathers fault type information and sends the fault type information to the operation and maintenance system to finish safety power utilization protection.
According to the embodiment, on the basis of not changing the topological structure of the distribution and utilization network, the safety power consumption monitoring terminal is installed on the distribution room, the branch box, the distribution box and the power taking socket, the voltage and current data in the monitoring interval are monitored in real time, the position of the fault section and the fault type are accurately identified through the edge computing gateway and the cloud platform, the safety protection of the safety power consumption can be promoted, the safety protection capability of the distribution and utilization side is effectively improved, and the probability of preventing or reducing the occurrence of potential power consumption hazards is played.
The process of performing safety electricity utilization protection by the four-stage protection safety electricity utilization monitoring system disclosed by the embodiment comprises the following steps:
The cloud platform sends a monitoring instruction to the edge computing gateway, the edge computing gateway and each safety electricity monitoring terminal complete communication, the safety electricity monitoring terminal of each power distribution protection section acquires voltage and current data of an operation line in real time through a signal acquisition module, faults are detected through a fault detection module, and fault waveforms are captured and recorded through a fault recording module; the recorded fault waveform data is uploaded to an edge computing gateway through a wired or wireless communication module;
The edge computing gateway receives and stores fault waveforms uploaded by each safety electricity utilization monitoring terminal through a storage module, identifies fault types and fault node information of each fault waveform through a fault identification module, gathers and analyzes identification results of each safety electricity utilization monitoring terminal, and uploads the identification results to the cloud platform through a wireless transmission module;
And thirdly, the cloud platform receives a fault data set identification result uploaded by the edge computing gateway, determines a power distribution section where the fault is located by combining the topological structure of the four-level protection safety system, and issues fault type and fault section information to operation and maintenance personnel through the operation and maintenance system to timely clear and treat fault hidden dangers.
The fault monitoring, positioning and identifying principles of the four-level protection safety electricity monitoring system are described through the attached figures 1-3, the cloud platform sends monitoring instructions to the four-level protection safety electricity monitoring system, and the safety electricity monitoring terminals in all the protection zones monitor voltage and current data of the operation section in real time; the method comprises the steps that faults occur at a section L1, each safety electricity utilization monitoring terminal detects the faults through a fault detection module, communication and time synchronization are conducted between the safety electricity utilization monitoring terminals nearby through a corresponding communication module and a time synchronization module, a wave recording module function is started, and waveform data in the fault period are uploaded to an edge computing gateway; the edge computing gateway performs computing comparison on the received fault data according to the fault identification module to determine the fault type, combines fault node information and uploads the fault node information to the cloud platform; the cloud platform receives fault node information, determines running section information of faults actually occurring through comparison with an actual topological network, gathers fault type information, and transmits the fault type information to an operation and maintenance system to guide operation and maintenance personnel to conduct hidden trouble investigation and fault treatment, and fault monitoring, positioning and identification of the four-level protection safety power utilization system are completed.
For distribution and utilization line topology with a ring network, safety electricity utilization monitoring terminals can be installed at two ends of a line section, namely the line section can be completely monitored, and the implementation effect of the distribution and utilization line topology is not affected.
The foregoing description of the embodiments of the invention is provided as an overview of the implementation principles, technical features and advantages of the invention, and it will be understood by those skilled in the art that the invention is not limited by the foregoing examples, which are provided for illustration only and are provided for the purpose of illustrating various changes and modifications made therein without departing from the spirit and scope of the invention as defined by the appended claims and their equivalents.
Claims (8)
1. The four-level protection safety electricity consumption monitoring system is characterized by comprising a safety electricity consumption monitoring terminal and an edge computing gateway; the safety electricity utilization monitoring terminal comprises a first communication module, the edge computing gateway comprises a second communication module, and the second communication module comprises an equipment side communication module and a platform side communication module; the signal input and output end of the first communication module is in butt joint with the signal output and input end of the equipment side communication module, and the signal input end of the equipment side communication module is connected with the signal output end of the platform side communication module;
The safe electricity consumption monitoring terminal further comprises a signal acquisition module, a fault detection module, a fault recording module and a time synchronization module, wherein the signal output end of the signal acquisition module is connected with the signal input end of the fault detection module, the signal output end of the fault detection module is connected with the first signal input end of the fault recording module, the second signal input end of the fault recording module is connected with the signal output end of the time synchronization module, the signal output end of the fault recording module is connected with the signal input end of the first communication module, the first signal output end of the first communication module is connected with the signal input end of the signal acquisition module, and the second signal output end of the first communication module is connected with the signal input end of the time synchronization module;
The edge computing gateway further comprises a storage module, a data processing and checking module and a fault identification module, wherein the signal output end of the storage module is connected with the signal input end of the data processing and checking module, the signal output end of the data processing and checking module is connected with the signal input end of the fault identification module, the signal output end of the fault identification module is connected with the signal input end of the platform side communication module, and the signal output end of the equipment side communication module is connected with the signal input end of the storage module.
2. The four-stage protection safety electricity consumption monitoring system according to claim 1, further comprising a cloud platform, wherein a signal input/output end of the cloud platform is in butt joint with a signal input/output end of the platform side communication module.
3. The four-level protection safety electricity consumption monitoring system according to claim 1, wherein the number of the safety electricity consumption monitoring terminals is several, the plurality of the safety electricity consumption monitoring terminals are respectively installed on the electricity distribution protection side of the electricity distribution room, the branch box, the distribution box and the electricity taking socket, each safety electricity consumption monitoring terminal is in real-time network communication with the edge computing gateway through a first communication module, and the plurality of the safety electricity consumption monitoring terminals are in communication through respective first communication modules.
4. A method for safety electricity monitoring using a four-stage protective safety electricity monitoring system as defined in any one of claims 1-3, comprising the steps of:
1. The cloud platform starts a four-level protection safety electricity monitoring system and issues a safety electricity monitoring instruction to the edge computing gateway;
2. The edge computing gateway and the safety electricity consumption monitoring terminals complete communication, and each safety electricity consumption monitoring terminal Mi starts to acquire electric parameters in real time in a corresponding four-level electricity consumption monitoring interval Lj through a signal acquisition module; i= {1,2, … …, P }, i is the number of the safety electricity monitoring terminals, and P is the total number of the safety electricity monitoring terminals; j= {1,2, … …, Q }, j is the number of the four-stage power consumption monitoring section, Q is the total number of monitoring line sections of the four-stage power consumption monitoring section;
3. The method comprises the steps that a safety electricity consumption monitoring terminal Mi collects and checks current sampling time t and electric parameters of a front sampling time interval (t-1) and a rear sampling time interval (t+1) through a fault detection module, when an I Ui (t+1) -Ui (t) | > Ui valve or an I Ii (t+1) -Ii (t) | > Ii valve is identified, the fault electric parameters are detected, a fault wave recording module is started to carry out local wave recording, wherein Ui (t) is the voltage effective value calculated by the safety electricity consumption monitoring terminal Mi when the sampling time t, and Ii (t) is the current effective value calculated by the safety electricity consumption monitoring terminal Mi when the sampling time t is;
4. uploading corresponding fault waveform data and fault node information obtained through local wave recording to an edge computing gateway;
5. The edge computing gateway receives fault waveform data and fault node information, the integrity and the correctness of the fault waveform data are verified through a data processing and checking module in the edge computing gateway, and then the fault type is identified through a fault identification module; the fault waveform data includes a fault voltage waveform and a fault current waveform.
5. The method for monitoring the safe electricity utilization according to claim 4, wherein the electrical parameters comprise a voltage parameter and a current parameter; the local wave recording specifically comprises the following steps: on the basis of a local area network, ensuring the consistency of time marks through a time setting module in the safe electricity consumption monitoring terminal, and simultaneously starting the safe electricity consumption monitoring terminal which detects the fault electric parameters to locally record the fault wave recording module when the safe electricity consumption monitoring terminal issues a wave recording instruction, and recording the voltage waveform and the current waveform under the current time mark; the Ui valve and the Ii valve are respectively a set voltage safety threshold and a set current safety threshold; the thresholds Ui and Ii can be modified locally in an offline manner or configured online by a user through a cloud platform.
6. The method for monitoring safe electricity consumption according to claim 4, further comprising step 6 of uploading the fault type identification result to a cloud platform.
7. The method for monitoring safe electricity consumption according to claim 4, further comprising step 7, the cloud platform transmitting the fault type identification result and the fault node position information to the operation and maintenance management system, and guiding the hidden trouble management and removal.
8. The method for monitoring safe electricity consumption according to claim 4, wherein the fault type is identified by the fault identification module, and the identification process specifically comprises the following steps:
5-1), voltage and current comparison is carried out: if Ui (t+1) < Ui (t) and Ui (t) -Ui (t+1) < Ui valve, and simultaneously Ii (t+1) > Ii (t) and Ii (t+1) -Ii (t) > Ii valve, identifying the fault type as parallel arc, and if the corresponding condition is not satisfied, performing voltage comparison;
5-2), performing voltage comparison: if Ui (t+1) < Ui (t) and Ui (t) -Ui (t+1) > Ui valve, identifying the fault type as a series arc, and if the corresponding condition is not met, comparing the currents;
5-3), current comparison: if Ii (t+1) -Ii (t) > Ii valve, identifying the fault type as "line overload"; if Ii (t+1) < Ii (t) and Ii (t) -Ii (t+1) > Ii valve, the fault type is identified as "leakage current"; if the current comparison does not belong to the two cases, the fault type is identified as an unknown fault.
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