CN114204678A - Voltage monitoring system for high-voltage power grid maintenance - Google Patents
Voltage monitoring system for high-voltage power grid maintenance Download PDFInfo
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 151
- 238000012423 maintenance Methods 0.000 title description 2
- 238000011156 evaluation Methods 0.000 claims abstract description 99
- 238000004891 communication Methods 0.000 claims abstract description 58
- 238000012360 testing method Methods 0.000 claims abstract description 47
- 238000001514 detection method Methods 0.000 claims abstract description 14
- 238000004088 simulation Methods 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims abstract description 10
- 230000005856 abnormality Effects 0.000 claims abstract description 8
- 238000012795 verification Methods 0.000 claims description 35
- 230000008054 signal transmission Effects 0.000 claims description 15
- 230000002159 abnormal effect Effects 0.000 claims description 14
- 238000012545 processing Methods 0.000 claims description 7
- 238000012546 transfer Methods 0.000 claims description 6
- 238000005259 measurement Methods 0.000 claims description 5
- 238000004364 calculation method Methods 0.000 claims description 2
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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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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
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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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- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
Abstract
The invention discloses a voltage monitoring system for maintaining a high-voltage power grid, which relates to the technical field of high-voltage power grid monitoring and comprises a target simulation module, an instruction input module, a processor, an abnormality testing module and a comprehensive evaluation module; the target simulation module is used for simulating the monitoring targets and setting target values of a plurality of monitoring targets; before the system runs, the abnormity testing module is used for receiving a testing instruction and then carrying out abnormity detection on the monitoring sensor; the processor is used for verifying the communication state of the monitoring sensor in real time, calculating to obtain a communication evaluation coefficient of the monitoring sensor and obtaining an evaluation signal; the comprehensive evaluation module is used for graphically displaying the change trend of a plurality of evaluation signals within preset time according to the time stamp; whether the communication problem of the monitoring sensor is serious or not is judged according to the change trend of the plurality of evaluation signals, and managers are prompted to process the communication problem in time, so that the monitoring sensor keeps a good communication state, and the monitoring effect of the monitoring sensor is improved.
Description
Technical Field
The invention relates to the technical field of high-voltage power grid monitoring, in particular to a voltage monitoring system for maintaining a high-voltage power grid.
Background
The overvoltage types in the power system are various, the generation reasons and the damage of the overvoltage types are different, the external overvoltage mainly refers to atmospheric overvoltage, the wave head of the external overvoltage is steep, the amplitude is high, and the external overvoltage is one of the main reasons for insulation accidents of the power system; internal overvoltage, although not very high in amplitude, is also of a long duration and poses a serious threat to the insulation of electrical equipment; through the voltage on-line monitoring system, the overvoltage conditions before and after an accident and accurate data of the influence of the overvoltage conditions on the power grid voltage during the accident are known, and reliable basis is provided for technicians to analyze the accident reason;
with the development of electronic products, more and more electronic products are used on the voltage on-line monitoring system, mutual interference exists among parts, in addition, the electromagnetic environment of the voltage on-line monitoring system is very complex in actual operation, and the communication states of various sensors need to be confirmed in the environments of airports, radar stations, launching towers and the like; the existing voltage on-line monitoring system has the problem that the communication state between a sensor and a processor cannot be judged according to a communication evaluation coefficient, so that managers can be reminded of processing in time.
Disclosure of Invention
In order to solve the problems existing in the scheme, the invention provides a voltage monitoring system for maintaining a high-voltage power grid.
The purpose of the invention can be realized by the following technical scheme:
a voltage monitoring system for maintaining a high-voltage power grid comprises a target simulation module, an instruction input module, a processor, an abnormality testing module and a comprehensive evaluation module;
the target simulation module is used for simulating the monitoring targets and setting target values of a plurality of monitoring targets;
before the system runs, a user inputs a test instruction through the instruction input module and transmits the test instruction to the processor, and the processor is used for receiving the test instruction and transmitting the test instruction to the abnormity test module; the abnormity testing module is used for carrying out abnormity detection on the monitoring sensor after receiving the testing instruction;
the processor is used for verifying the communication state of the monitoring sensor in real time, sending a first verification signal to the signal transmission module according to a verification period corresponding to the monitoring sensor, and calculating to obtain a communication evaluation coefficient LS of the monitoring sensor; then comparing the communication evaluation coefficient LS with a communication evaluation coefficient threshold value to obtain an evaluation signal; the processor is used for stamping the evaluation signal and transmitting the evaluation signal to the database for real-time storage;
the comprehensive evaluation module is used for comprehensively evaluating the evaluation signals with the time stamps stored in the database, and graphically displaying the change trend of the evaluation signals within the preset time according to the time stamps; and judging whether the communication problem of the monitoring sensor is serious or not according to the change trend of the plurality of evaluation signals.
Further, the anomaly testing module comprises a signal transmitting unit, a transmitting antenna, a signal receiving unit and a judging unit, and the specific testing steps are as follows:
after receiving the test instruction, the anomaly test module transmits a detection signal to the monitoring sensor through the signal transmitting unit, and simultaneously, the transmitting antenna is used for transmitting an interference signal to carry out electromagnetic wave interference on the monitoring sensor; wherein the monitoring sensors are provided with position marks;
the signal receiving unit receives a digital signal which is acquired by the monitoring sensor aiming at the monitored target according to the detection signal and outputs an actual measurement value of the monitored target according to the digital signal;
the judging unit is used for judging whether the measured value of the monitoring target is consistent with the target value; if the monitoring signals are inconsistent, judging that the anti-interference capability of the monitoring sensor is abnormal, and generating an abnormal signal.
Furthermore, the abnormity testing module is used for transmitting the abnormity signal and the position identification corresponding to the monitoring sensor to the processor, and the processor is used for automatically driving the alarm module to give an alarm when receiving the abnormity signal and automatically driving the display module to display the position identification corresponding to the monitoring sensor.
Further, the target value comprises the resolution, the precision and whether noise interference exists; the monitoring target is various power parameters including voltage, current and impedance in the high-voltage power grid operation process.
Further, the calculation method of the communication evaluation coefficient LS is as follows:
the processor sends a first verification signal to the signal transmission module according to a verification period corresponding to the monitoring sensor, and the signal transmission module sends the received first verification signal to the monitoring sensor;
in response to receiving the first verification signal, the monitoring sensor sends a second verification signal to be transmitted to the processor through the signal transmission module; marking the first verification signal sent by the processor as the signal sending time, marking the time when the monitoring sensor receives the first verification signal as the signal transfer time, and marking the time when the processor receives the second verification signal as the signal receiving time;
calculating the time difference between the signal sending time and the signal transferring time to obtain a first time difference L1; calculating the time difference between the signal transfer time and the signal receiving time to obtain a second time difference L2;
obtaining a communication evaluation coefficient LS of the monitoring sensor by using a formula LS (L1 × a1+ L2 × a2) × | L1-L2 |; wherein a1 and a2 are coefficient factors.
Further, comparing the communication evaluation coefficient LS with a communication evaluation coefficient threshold to obtain an evaluation signal, specifically: the communication assessment coefficient thresholds include Y1, Y2; wherein Y1 and Y2 are preset values, and Y1 is more than Y2; if 0 < LS < Y1, the evaluation signal is a good signal; if Y1 is less than or equal to LS < Y2, the evaluation signal is a general signal; if LS ≧ Y2, the evaluation signal is a range signal.
Further, the specific evaluation method of the comprehensive evaluation module is as follows:
acquiring all evaluation signals of the monitoring sensor in the current operation process according to the timestamp, and graphically displaying the change trend of the evaluation signals within the preset time;
marking the evaluation signal as Si, and when the evaluation signal is a good signal, Si is 0; when the evaluation signal is a general signal, Si is 1; when the evaluation signal is an extremely poor signal, Si is 2;
acquiring the number of Si-0, and judging whether the number of Si-0 is more than 0;
if the number of Si-0 is more than 0, obtaining the number of Si-2; when the number of Si-2 reaches a preset first number or the number of Si-2 reaches a preset first proportion or the number of continuous Si-2 reaches a preset second number, determining that the communication problem of the current monitoring sensor is serious, and generating an early warning signal;
the comprehensive evaluation module is used for transmitting the early warning signal to the processor, and the processor is used for automatically driving the alarm module to give an alarm when receiving the early warning signal and automatically driving the display module to display that the monitoring sensor has serious communication problem and suggests processing.
Further, if the number of Si ═ 0 is equal to 0, when the number of Si ═ 2 reaches a preset third number or the number of Si ═ 2 reaches a preset second ratio or the number of consecutive Si ═ 2 reaches a preset fourth number, determining that the communication problem of the current monitoring sensor is serious, and generating an early warning signal;
the preset third number is smaller than the preset first number, the preset second proportion is smaller than the preset first proportion, and the preset fourth number is smaller than the preset second number.
Compared with the prior art, the invention has the beneficial effects that:
1. the system comprises a target simulation module, a signal receiving unit, a display module, a plurality of monitoring sensors, a signal processing unit and a signal processing unit, wherein the target simulation module is used for simulating monitoring targets and setting target values of the monitoring targets, before the system runs, the abnormity testing module is used for receiving a testing instruction and then carrying out abnormity detection on the monitoring sensors, the signal receiving unit is used for receiving digital signals which are acquired by the monitoring sensors according to detection signals and aiming at the monitoring targets, judging whether the measured values of the monitoring targets are consistent with the target values or not, and can give an early warning in time, and the display module displays position marks corresponding to the monitoring sensors, prompts managers that the monitoring sensors have abnormal anti-interference capability, proposes to replace the sensors or reset parameters, and improves the monitoring effect of the monitoring sensors;
2. the processor is used for verifying the communication state of the monitoring sensor in real time, firstly, the processor sends a first verification signal to the signal transmission module according to a verification period corresponding to the monitoring sensor, a communication evaluation coefficient LS of the monitoring sensor is obtained through relevant processing, and the communication evaluation coefficient LS is compared with a communication evaluation coefficient threshold value to obtain an evaluation signal; the comprehensive evaluation module is used for comprehensively evaluating the evaluation signals with the time stamps stored in the database, and graphically displaying the change trend of the plurality of evaluation signals within the preset time according to the time stamps; whether the communication problem of the monitoring sensor is serious or not is judged according to the change trend of the plurality of evaluation signals, and managers are prompted to process the communication problem in time, so that the monitoring sensor keeps a good communication state, and the monitoring effect of the monitoring sensor is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic block diagram of a voltage monitoring system for maintaining a high-voltage power grid according to the present invention.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood 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.
As shown in fig. 1, a voltage monitoring system for maintaining a high-voltage power grid includes a target simulation module, an instruction input module, a processor, an abnormality test module, an alarm module, a display module, a signal transmission module, a database, and a comprehensive evaluation module;
the target simulation module is used for simulating the monitoring targets and setting target values of a plurality of monitoring targets; the target value comprises the resolution and precision of the signal, whether noise interference exists or not and the like; the monitoring target is various power parameters such as voltage, current, impedance and the like in the high-voltage power grid operation process;
before the system runs, a user inputs a test instruction through the instruction input module and transmits the test instruction to the processor, and the processor is used for receiving the test instruction and transmitting the test instruction to the abnormity test module; the abnormity testing module is used for carrying out abnormity detection on the monitoring sensor after receiving the testing instruction; the abnormity testing module comprises a signal transmitting unit, a transmitting antenna, a signal receiving unit and a judging unit; the specific working steps of the abnormity testing module are as follows:
VV 1: after receiving the test instruction, the anomaly test module transmits a detection signal to the monitoring sensor through the signal transmitting unit, and simultaneously, the transmitting antenna is used for transmitting an interference signal to carry out electromagnetic wave interference on the monitoring sensor; wherein the monitoring sensors are provided with position marks;
VV 2: the signal receiving unit is used for receiving a digital signal which is acquired by the monitoring sensor aiming at the monitored target according to the detection signal and outputting an actual measurement value of the monitored target according to the digital signal;
VV 3: the judging unit is used for judging whether the measured value of the monitoring target is consistent with the target value; if the monitoring signals are consistent, the anti-interference capability of the monitoring sensor is normal; generating a normal signal; if the monitoring signals are inconsistent, judging that the anti-interference capability of the monitoring sensor is abnormal, and generating an abnormal signal;
the abnormal testing module is used for transmitting a normal signal, an abnormal signal and a position mark corresponding to the monitoring sensor to the processor, and the processor is used for automatically driving the alarm module to give an alarm when receiving the abnormal signal, automatically driving the display module to display the position mark corresponding to the monitoring sensor, prompting a manager that the monitoring sensor is judged to have abnormal anti-interference capability, and recommending to replace the sensor or resetting parameters;
the processor is used for verifying the communication state of the monitoring sensor in real time, and the specific verification steps are as follows:
the method comprises the following steps: the processor sends a first verification signal to the signal transmission module according to a verification period corresponding to the monitoring sensor, and the signal transmission module immediately sends the first verification signal to the monitoring sensor after receiving the first verification signal;
step two: when the monitoring sensor receives the first verification signal, a second verification signal is immediately sent, and the second verification signal is transmitted to the processor through the signal transmission module;
marking the moment when the processor sends the first verification signal to the signal transmission module as a signal sending moment, and marking the moment when the monitoring sensor receives the first verification signal as a signal transfer moment; marking the moment when the processor receives the second verification signal again as the signal receiving moment;
step three: calculating the time difference between the signal sending time and the signal transferring time to obtain a first time difference, and marking the first time difference as L1;
calculating the time difference between the signal transfer time and the signal receiving time to obtain a second time difference, and marking the second time difference as L2;
obtaining a communication evaluation coefficient LS of the monitoring sensor by using a formula LS (L1 × a1+ L2 × a2) × | L1-L2 |; wherein a1 and a2 are coefficient factors;
step four: comparing the communication evaluation coefficient LS with a communication evaluation coefficient threshold value to obtain an evaluation signal; the communication assessment coefficient thresholds include Y1, Y2; wherein Y1 and Y2 are preset values; y1 < Y2;
if 0 < LS < Y1, the evaluation signal is a good signal;
if Y1 is less than or equal to LS < Y2, the evaluation signal is a general signal;
if LS is more than or equal to Y2, the evaluation signal is a range signal;
the processor is used for stamping the evaluation signal and transmitting the evaluation signal to the database for real-time storage;
the comprehensive evaluation module is used for comprehensively evaluating evaluation signals with time stamps stored in the database, and the specific evaluation method comprises the following steps:
acquiring all evaluation signals of the monitoring sensor in the current operation process according to the timestamp; graphically displaying the variation trend of the plurality of evaluation signals within the preset time; the method comprises the following steps:
marking the evaluation signal as Si, and when the evaluation signal is a good signal, Si is 0; when the evaluation signal is a general signal, Si is 1; when the evaluation signal is an extremely poor signal, Si is 2;
acquiring the number of Si-0, and judging whether the number of Si-0 is more than 0;
if the number of Si-0 is more than 0, obtaining the number of Si-2; when the number of Si-2 reaches a preset first number or the number of Si-2 reaches a preset first proportion or the number of continuous Si-2 reaches a preset second number, determining that the communication problem of the current monitoring sensor is serious, and generating an early warning signal;
if the number of Si-0 equals to 0, determining that the communication problem of the current monitoring sensor is serious when the number of Si-2 reaches a preset third number or the number of Si-2 reaches a preset second proportion or the number of continuous Si-2 reaches a preset fourth number, and generating an early warning signal;
the preset third quantity is smaller than the preset first quantity, the preset second proportion is smaller than the preset first proportion, and the preset fourth quantity is smaller than the preset second quantity;
the comprehensive evaluation module is used for transmitting the early warning signal to the processor, and the processor is used for automatically driving the alarm module to give an alarm when receiving the early warning signal and automatically driving the display module to display that the communication problem of the monitoring sensor is serious and the monitoring sensor is recommended to be processed; therefore, the monitoring sensor keeps a good communication state, and the monitoring effect of the monitoring sensor is improved.
The above formulas are all calculated by removing dimensions and taking numerical values thereof, the formula is a formula which is obtained by acquiring a large amount of data and performing software simulation to obtain the closest real situation, and the preset parameters and the preset threshold value in the formula are set by the technical personnel in the field according to the actual situation or obtained by simulating a large amount of data.
The working principle of the invention is as follows:
when the voltage monitoring system for maintaining the high-voltage power grid works, firstly, a target simulation module is used for simulating a monitoring target and setting target values of a plurality of monitoring targets; before the system runs, a user inputs a test instruction through the instruction input module, the abnormity test module is used for carrying out abnormity detection on the monitoring sensor after receiving the test instruction, the signal receiving unit is used for receiving a digital signal which is acquired by the monitoring sensor according to a detection signal and aiming at a monitoring target and outputting an actual measurement value of the monitoring target according to the digital signal, and the judging unit is used for judging whether the actual measurement value of the monitoring target is consistent with a target value or not; if the monitoring signals are inconsistent, judging that the anti-interference capability of the monitoring sensor is abnormal, and generating an abnormal signal; the processor is used for automatically driving the alarm module to give an alarm when receiving the abnormal signal and automatically driving the display module to display the position identification corresponding to the monitoring sensor;
the processor is used for verifying the communication state of the monitoring sensor in real time; firstly, a processor sends a first verification signal to a signal transmission module according to a verification period corresponding to a monitoring sensor, a communication evaluation coefficient LS of the monitoring sensor is obtained through relevant processing, and the communication evaluation coefficient LS is compared with a communication evaluation coefficient threshold value to obtain an evaluation signal; the comprehensive evaluation module is used for comprehensively evaluating the evaluation signals with the time stamps stored in the database, and graphically displaying the change trend of the plurality of evaluation signals within the preset time according to the time stamps; judging whether the communication problem of the monitoring sensor is serious or not according to the variation trend of the plurality of evaluation signals, automatically driving an alarm module to give an alarm when the processor receives an early warning signal, and automatically driving a display module to display that the communication problem of the monitoring sensor is serious and the communication problem of the monitoring sensor is recommended to be processed; therefore, the monitoring sensor keeps a good communication state, and the monitoring effect of the monitoring sensor is improved.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise forms disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (8)
1. A voltage monitoring system for maintaining a high-voltage power grid is characterized by comprising a target simulation module, an instruction input module, a processor, an abnormality testing module and a comprehensive evaluation module;
the target simulation module is used for simulating the monitoring targets and setting target values of a plurality of monitoring targets;
before the system runs, a user inputs a test instruction through the instruction input module and transmits the test instruction to the processor, and the processor is used for receiving the test instruction and transmitting the test instruction to the abnormity test module; the abnormity testing module is used for carrying out abnormity detection on the monitoring sensor after receiving the testing instruction;
the processor is used for verifying the communication state of the monitoring sensor in real time, sending a first verification signal to the signal transmission module according to a verification period corresponding to the monitoring sensor, and calculating to obtain a communication evaluation coefficient LS of the monitoring sensor; then comparing the communication evaluation coefficient LS with a communication evaluation coefficient threshold value to obtain an evaluation signal; the processor is used for stamping the evaluation signal and transmitting the evaluation signal to the database for real-time storage;
the comprehensive evaluation module is used for comprehensively evaluating the evaluation signals with the time stamps stored in the database, and graphically displaying the change trend of the evaluation signals within the preset time according to the time stamps; and judging whether the communication problem of the monitoring sensor is serious or not according to the change trend of the plurality of evaluation signals.
2. The voltage monitoring system for maintaining the high-voltage power grid as claimed in claim 1, wherein the abnormality testing module comprises a signal transmitting unit, a transmitting antenna, a signal receiving unit and a judging unit, and the specific testing steps are as follows:
after receiving the test instruction, the anomaly test module transmits a detection signal to the monitoring sensor through the signal transmitting unit, and simultaneously, the transmitting antenna is used for transmitting an interference signal to carry out electromagnetic wave interference on the monitoring sensor; wherein the monitoring sensors are provided with position marks;
the signal receiving unit receives a digital signal which is acquired by the monitoring sensor aiming at the monitored target according to the detection signal and outputs an actual measurement value of the monitored target according to the digital signal;
the judging unit is used for judging whether the measured value of the monitoring target is consistent with the target value; if the monitoring signals are inconsistent, judging that the anti-interference capability of the monitoring sensor is abnormal, and generating an abnormal signal.
3. The voltage monitoring system for maintaining the high-voltage power grid as claimed in claim 2, wherein the abnormality testing module is configured to transmit an abnormality signal and a location identifier corresponding to the monitoring sensor to the processor, and the processor is configured to automatically drive the alarm module to issue an alarm when receiving the abnormality signal, and automatically drive the display module to display the location identifier corresponding to the monitoring sensor.
4. The voltage monitoring system for maintaining the high-voltage power grid according to claim 1, wherein the target value comprises resolution, accuracy and whether noise interference exists; the monitoring target is various power parameters including voltage, current and impedance in the high-voltage power grid operation process.
5. The voltage monitoring system for maintaining the high-voltage power grid as claimed in claim 1, wherein the calculation method of the communication evaluation coefficient LS comprises the following steps:
the processor sends a first verification signal to the signal transmission module according to a verification period corresponding to the monitoring sensor, and the signal transmission module sends the received first verification signal to the monitoring sensor;
in response to receiving the first verification signal, the monitoring sensor sends a second verification signal to be transmitted to the processor through the signal transmission module; marking the first verification signal sent by the processor as the signal sending time, marking the time when the monitoring sensor receives the first verification signal as the signal transfer time, and marking the time when the processor receives the second verification signal as the signal receiving time;
calculating the time difference between the signal sending time and the signal transferring time to obtain a first time difference L1; calculating the time difference between the signal transfer time and the signal receiving time to obtain a second time difference L2;
obtaining a communication evaluation coefficient LS of the monitoring sensor by using a formula LS (L1 × a1+ L2 × a2) × | L1-L2 |; wherein a1 and a2 are coefficient factors.
6. The voltage monitoring system for maintaining the high-voltage power grid as claimed in claim 1, wherein the communication evaluation coefficient LS is compared with a communication evaluation coefficient threshold to obtain an evaluation signal, specifically: the communication assessment coefficient thresholds include Y1, Y2; wherein Y1 and Y2 are preset values, and Y1 is more than Y2; if 0 < LS < Y1, the evaluation signal is a good signal; if Y1 is less than or equal to LS < Y2, the evaluation signal is a general signal; if LS ≧ Y2, the evaluation signal is a range signal.
7. The voltage monitoring system for maintaining the high-voltage power grid as claimed in claim 1, wherein the specific evaluation method of the comprehensive evaluation module is as follows:
acquiring all evaluation signals of the monitoring sensor in the current operation process according to the timestamp, and graphically displaying the change trend of the evaluation signals within the preset time;
marking the evaluation signal as Si, and when the evaluation signal is a good signal, Si is 0; when the evaluation signal is a general signal, Si is 1; when the evaluation signal is an extremely poor signal, Si is 2;
acquiring the number of Si-0, and judging whether the number of Si-0 is more than 0;
if the number of Si-0 is more than 0, obtaining the number of Si-2; when the number of Si-2 reaches a preset first number or the number of Si-2 reaches a preset first proportion or the number of continuous Si-2 reaches a preset second number, determining that the communication problem of the current monitoring sensor is serious, and generating an early warning signal;
the comprehensive evaluation module is used for transmitting the early warning signal to the processor, and the processor is used for automatically driving the alarm module to give an alarm when receiving the early warning signal and automatically driving the display module to display that the monitoring sensor has serious communication problem and suggests processing.
8. The voltage monitoring system for maintaining the high-voltage power grid according to claim 7, wherein if the number of Si-0 equals to 0, when the number of Si-2 reaches a preset third number, or the number of Si-2 reaches a preset second ratio, or the number of consecutive Si-2 reaches a preset fourth number, it is determined that the communication problem of the current monitoring sensor is serious, and an early warning signal is generated;
the preset third number is smaller than the preset first number, the preset second proportion is smaller than the preset first proportion, and the preset fourth number is smaller than the preset second number.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116400666A (en) * | 2023-03-23 | 2023-07-07 | 斯比泰电子（嘉兴）有限公司 | LabVIEW-based rotary platform testing system |
| CN117558094A (en) * | 2023-11-09 | 2024-02-13 | 应急管理部大数据中心 | Forest fire monitoring method and system based on iron tower big data |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116400666A (en) * | 2023-03-23 | 2023-07-07 | 斯比泰电子（嘉兴）有限公司 | LabVIEW-based rotary platform testing system |
| CN116400666B (en) * | 2023-03-23 | 2024-02-23 | 斯比泰电子（嘉兴）有限公司 | LabVIEW-based rotary platform testing system |
| CN117558094A (en) * | 2023-11-09 | 2024-02-13 | 应急管理部大数据中心 | Forest fire monitoring method and system based on iron tower big data |
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