CN117114422B - Fusion monitoring system of high-voltage switch equipment - Google Patents
Fusion monitoring system of high-voltage switch equipment Download PDFInfo
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Abstract
The invention relates to the technical field of high-voltage switch equipment monitoring, and particularly discloses a fusion monitoring system of high-voltage switch equipment, which comprises the following components: the invention utilizes the working environment monitoring and fault information monitoring of the high-voltage switch equipment to further evaluate the potential risk of the high-voltage switch equipment, helps identify the risk factors possibly causing accidents or faults, is favorable for taking preventive measures in time and reducing the occurrence of safety accidents, and simultaneously monitors the running state of the high-voltage switch equipment, including the monitoring of an air box unit and a switch unit, helps check the air tightness and the switch performance of the equipment, further monitors the insulating performance and the working state of the high-voltage switch equipment, can ensure the safety of the high-voltage switch equipment and ensures the stable running of a power system.
Description
Technical Field
The invention relates to the technical field of high-voltage switch equipment monitoring, in particular to a fusion monitoring system of high-voltage switch equipment.
Background
The high-voltage switch equipment is key equipment for controlling, distributing and protecting a high-voltage power system, can help to control the on-off of the power system and ensure the normal operation of the power system, wherein the SF6 gas fully-insulated metal-enclosed switch equipment is common high-voltage electrical equipment, is widely applied to substations, switchyards and power transmission lines of the power system, and cannot comprehensively and effectively monitor the novel high-voltage switch equipment along with continuous iteration of technology, so that the fusion monitoring system of the high-voltage switch equipment is required to be improved, and the stable operation of the high-voltage switch equipment is ensured.
For example, bulletin numbers: the invention patent of CN104765395B discloses a KYN series switch cabinet operation environment control system and a method, comprising a KYN series switch cabinet, a ventilation device and a dehumidifying device which are arranged on the switch cabinet, a controller, a temperature detection module and a humidity detection module which are used for detecting the switch cabinet operation environment, wherein the output ends of the temperature detection module and the humidity detection module are connected with the input port of the controller, the output port of the controller is used for controlling the operation states of the ventilation device and the dehumidifying device through a control loop, and the invention is used for controlling the operation states of the ventilation and the dehumidifying device in the switch cabinet through the controller, so that the operation of the switch cabinet is safer and the energy waste is avoided.
In summary, there are some drawbacks to monitoring high voltage switchgear, particularly in the following aspects: (1) The current monitoring to high-voltage switchgear focuses on the operating condition of high-voltage switchgear itself, neglects the detailed monitoring to high-voltage switchgear operational environment, for example, operational environment's humiture, environment humiture can cause serious influence to high-voltage switchgear's normal work, unusual temperature and humidity can cause the adverse effect to high-voltage switchgear's insulating properties, lead to high-voltage switchgear's trouble and instability easily, neglect operational environment and can't carry out the aassessment to high-voltage switchgear's potential risk, and then induce multiple potential safety hazard.
(2) Currently, the monitoring force of the running state of the high-voltage switch equipment is deficient, for example, the concentration of SF6 gas around the high-voltage switch equipment is monitored, the SF6 gas is an insulating medium of the high-voltage switch equipment, the concentration of the SF6 gas around the high-voltage switch equipment is ignored to be monitored, the leakage condition of the SF6 gas of the high-voltage switch equipment cannot be found in time, the effective maintenance of the high-voltage switch equipment is affected, and the probability of safety accidents is improved.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a fusion monitoring system of high-voltage switch equipment, which can effectively solve the problems related to the background art.
In order to achieve the above purpose, the invention is realized by the following technical scheme: the first aspect of the present invention provides a fusion monitoring system for high voltage switchgear, comprising: the interference information monitoring module is used for monitoring interference information of the target high-voltage switch equipment, wherein the interference information comprises working environment parameters and fault information parameters, and further, environmental interference values and fault degree evaluation indexes of the target high-voltage switch equipment are calculated.
And the data integration processing center is used for comprehensively calculating the potential risk assessment index of the target high-voltage switch equipment and carrying out early warning display.
The operation state monitoring module is used for monitoring operation state parameters of the target high-voltage switch equipment and comprises an air box unit and a switch unit, and further sequentially evaluating an air box abnormality evaluation index and a switch abnormality evaluation index of the target high-voltage switch equipment.
The abnormal state feedback module is used for comprehensively calculating the abnormal state index of the operation state of the target high-voltage switch equipment and carrying out warning feedback on the abnormal state.
The high-voltage switchgear database is used for storing a proper working temperature range, a proper working humidity range, a critical corrosion resistant gas concentration tolerance, a reference allowable working area noise intensity, a critical vibration intensity, a reference standard vibration frequency, a standard vibration signal waveform, a rated working current, a standard current signal waveform, a potential risk assessment index threshold value, an SF6 gas critical concentration threshold value, a gas rated pressure, a switching unit rated working voltage, a switching unit reference loop resistance and an operation state abnormality index threshold value of the target high-voltage switchgear.
As a further method, the working environment parameters are specifically monitored as follows: monitoring point layout is carried out on the working areas of the target high-voltage switch equipment according to the set number, and the temperature of each monitoring point in the working areas of the target high-voltage switch equipment is obtainedAnd moisture->Simultaneously, the suitable operating temperature range and the suitable operating humidity range of the target high-voltage switchgear are obtained from the high-voltage switchgear database, and the intermediate value of the range is extracted as the reference standard suitable operating temperature +.>And reference standard suitable working humidity->Comprehensively calculating a temperature and humidity interference degree index of a working area of the target high-voltage switch equipment>The specific numerical calculation formula is as follows:wherein->And->Respectively expressed as a set allowable deviation temperature and allowable deviation humidity, ">And->Are respectively expressed as the influence factors corresponding to the set temperature and humidity, ">Number expressed as each monitoring point, +.>，/>Expressed as the total number of monitoring points.
Monitoring and obtaining oxygen concentration of each monitoring point in working area of target high-voltage switch equipmentAnd various corrosive gas concentrations->And obtaining the target voltage switch from the database of the high-voltage switch equipment by matchingCritical corrosive gas resistant concentration of the switch device->Comprehensively calculating harmful gas interference degree index of working area of target high-voltage switch equipment>The specific calculation expression is: />Wherein->An operation influencing factor expressed as a set unit oxygen concentration,/->Expressed as natural constant>Indicated as the number of each type of corrosive gas,，/>expressed as the total number of species of corrosive gas.
Monitoring to obtain noise intensity of each monitoring point in working area of target high-voltage switch equipmentAnd obtaining the noise intensity of the reference allowable working area of the target high-voltage switch equipment from the high-voltage switch equipment database>Simultaneously obtaining the distance between each monitoring point and the target voltage switch equipment>Comprehensively calculating noise intensity interference degree index of working area of target high-voltage switch equipment>The specific numerical calculation formula is as follows:wherein->Expressed as the set allowable deviation noise intensity, +.>Expressed as an interference factor corresponding to the set unit noise intensity.
As a further method, the calculating of the ambient interference value of the target voltage switchgearThe specific calculation expression is: />Wherein->、/>And->The influence weight factors are respectively expressed as the set influence weight factors corresponding to the temperature and humidity interference degree, the harmful gas interference degree and the noise intensity interference degree of the working area.
As a further method, the fault information parameter specifically includes: arranging vibration monitoring points in set number, monitoring vibration signals of the target voltage switch equipment, processing the vibration signals to obtain vibration signal waveforms of all the vibration monitoring points of the target voltage switch equipment, and obtaining all the vibration intensities of all the vibration monitoring points of the target voltage switch equipmentThereby obtaining the target voltage switch equipmentVibration frequency of each vibration monitoring point of (2)>Simultaneously obtaining critical vibration intensity of the target high-voltage switchgear from the high-voltage switchgear database>And reference standard vibration frequency->。
Obtaining standard vibration signal waveforms of the target high-voltage switch equipment from a high-voltage switch equipment database, and extracting the length of the standard vibration signal waveformsThe vibration signal waveform of each vibration monitoring point of the target voltage switch equipment is subjected to overlap comparison with the standard vibration signal waveform, so that the overlapping length +_ of the vibration signal waveform of each vibration monitoring point of the target voltage switch equipment is obtained>。
Comprehensive calculation of vibration signal abnormality index of target voltage switch equipmentThe calculation formula is as follows:wherein->And->Respectively expressed as the set allowable deviation vibration intensity and allowable deviation vibration frequency, < >>Indicated as the number of each vibration monitoring point,，/>expressed as the total number of vibration monitoring points, +.>Indicated as the number of each vibration,，/>expressed as the total number of vibrations.
Monitoring the working current intensity of the target high-voltage switch equipment to obtain the working current of each monitoring time point of the target high-voltage switch equipmentAnd obtaining rated working current of the target voltage switchgear from the database of the high voltage switchgearAnd simultaneously, monitoring the current signal of the target voltage switching equipment to obtain the current signal waveform of the target voltage switching equipment.
Obtaining standard current signal waveform generated by rated current of target voltage switching equipment from high voltage switching equipment database, and extracting standard current signal waveform lengthThe current signal waveform of the target voltage switching equipment is subjected to overlap comparison with the standard current signal waveform, so that the overlapping length of the current signal waveform of the target voltage switching equipment is obtained>。
Comprehensive calculation of current signal abnormality index of target voltage switch equipmentThe calculation formula is as follows:wherein->Indicated as set allowable deviation operating current, +.>And->Respectively expressed as the set current intensity and the duty ratio weight of the current signal, +.>Number expressed as each monitoring time point, +.>，/>Expressed as the total number of monitoring time points.
As a further method, the target high-voltage switching device, the specific failure degree evaluation index thereofThe specific calculation expression of (2) is as follows: />Wherein->And->The vibration signal abnormality index and the current signal abnormality index are respectively expressed as the duty ratio weights to which the set vibration signal abnormality index and the current signal abnormality index belong.
As a further method, the potential risk assessment index of the target voltage switching device is comprehensively calculated, early warning display is carried out, and the specific analysis process is as follows: computing a model from dataProcessing to obtain a risk potential evaluation index of the target high-voltage switch device>Wherein->And->The environmental disturbance value and the fault level evaluation index, respectively, are indicated as target high-voltage switching device, +.>And->Respectively expressed as the set environmental interference value and the corresponding influence weight factors of the fault degree evaluation index.
And extracting a potential risk assessment index threshold value from the high-voltage switch equipment database, comparing the potential risk assessment index of the target high-voltage switch equipment with the potential risk assessment index threshold value, and if the potential risk assessment index of the target high-voltage switch equipment is higher than the potential risk assessment index threshold value, performing early warning display on the target high-voltage switch equipment.
As a further method, the gas tank unit is configured to perform abnormal assessment on a gas tank state of the target high-voltage switching device, and the specific analysis process is as follows: arranging gas monitoring points on the surface of the gas tank in a set number, and monitoring the concentration of SF6 gas near the gas tank to obtain the concentration of SF6 gas at each gas monitoring pointAnd acquiring SF6 gas critical concentration threshold value +.>Comprehensively calculating SF6 gas concentration abnormality evaluation index of target high-voltage switch equipment>The specific calculation expression is: />Wherein->Indicated as set allowable deviation SF6 gas concentration, ">Indicated as a set SF6 gas concentration correction factor, ">Indicated as the number of each gas monitoring point,，/>expressed as the total number of gas monitoring points.
Monitoring the air pressure inside the air tank of the target high-voltage switch equipment to obtain the air tank air pressure of each monitoring time point of the target high-voltage switch equipmentAnd obtaining the rated gas pressure of the target high-voltage switchgear from the database of the high-voltage switchgear>Further, an air pressure abnormality evaluation index of the target high-voltage switching device is calculated>The specific calculation expression is:wherein->Indicated as set allowable deviation air box air pressure.
Comprehensive aggregateCalculating gas tank abnormality evaluation index of target high-voltage switch equipmentThe specific calculation expression is:wherein->And->Respectively expressed as the duty ratio weight to which the set SF6 gas concentration abnormality evaluation index and the air pressure abnormality evaluation index belong.
As a further method, the switching unit is configured to perform abnormal evaluation on a switching state of the target high-voltage switching device, and the specific analysis process is as follows: monitoring loop resistance and working voltage of a switching unit of the target high-voltage switching device to obtain the working voltage of the switching unit of each monitoring time point of the target high-voltage switching deviceAnd a switching unit loop resistorAt the same time, the rated operating voltage of the switching unit of the target-voltage switching device is obtained from the high-voltage switching device database>And the switching unit reference loop resistance +.>Comprehensively calculating a switching abnormality evaluation index of the target voltage switching device>The specific calculation expression is: />Wherein->And->Respectively expressed as a set allowable deviation operating voltage and allowable deviation loop resistance, < >>And->Respectively expressed as the set operating voltage and the corresponding influence factors of the loop resistance.
As a further method, the integrated calculation of the operating state abnormality index of the target voltage switching deviceThe specific calculation expression is: />Wherein->And->The set gas tank abnormality evaluation index and the set switch abnormality evaluation index are respectively expressed as influence weight factors corresponding to the set gas tank abnormality evaluation index and the switch abnormality evaluation index.
As a further method, the alarm feedback is performed on the abnormal state, and the specific analysis process is as follows: extracting an operation state abnormality index threshold of the target high-voltage switch equipment from a high-voltage switch equipment database, comparing the operation state abnormality index of the target high-voltage switch equipment with the operation state abnormality index threshold, and if the operation state abnormality index of the target high-voltage switch equipment is higher than the operation state abnormality index threshold, carrying out warning feedback on the abnormality state of the target high-voltage switch equipment.
Compared with the prior art, the embodiment of the invention has at least the following advantages or beneficial effects:
(1) The invention provides a fusion monitoring system of high-voltage switch equipment, which utilizes the monitoring of the working environment and fault information of the high-voltage switch equipment to evaluate the potential risk of the high-voltage switch equipment, help identify the risk factors possibly causing accidents or faults, help take preventive measures in time, reduce the occurrence of safety accidents, monitor the running state of the high-voltage switch equipment, monitor the insulating performance and the working state of the high-voltage switch equipment, ensure the safety of the high-voltage switch equipment and ensure the stable running of a power system.
(2) According to the invention, through monitoring the working environment of the high-voltage switch equipment, including monitoring the temperature and humidity of the environment and monitoring the concentration of oxygen and various corrosive gases, preventive measures can be timely taken against abnormal environmental changes, adverse effects of environmental factors on the performance and stability of the equipment are prevented, the reliability and stability of the equipment are further improved, meanwhile, the equipment can be maintained against the working environment, the ageing speed of the equipment is slowed down, and the service life of the equipment is prolonged.
(3) The invention monitors the fault information of the high-voltage switch equipment, including vibration signal monitoring and current signal monitoring, the vibration signal monitoring can help to timely detect mechanical problems and faults in the equipment, avoid excessive wear and damage of the equipment, reduce unnecessary periodic maintenance through vibration monitoring, reduce maintenance cost, and simultaneously the current signal monitoring can help to analyze the performance and efficiency of the equipment, detect electrical problems in the equipment and ensure the working stability of the high-voltage switch equipment.
(4) The invention monitors the running state of the high-voltage switch equipment, including the gas tank unit monitoring and the switch unit monitoring, can timely find the gas leakage problem by monitoring the gas tank unit, and adopts effective maintenance measures, thereby ensuring the insulativity of the high-voltage switch equipment, avoiding the occurrence of unexpected situations caused by equipment faults, ensuring the normal running of the high-voltage switch equipment by monitoring the switch unit, and improving the safety and the stability of a power system.
Drawings
The invention will be further described with reference to the accompanying drawings, in which embodiments do not constitute any limitation of the invention, and other drawings can be obtained by one of ordinary skill in the art without inventive effort from the following drawings.
Fig. 1 is a schematic diagram of a system module connection according to the present invention.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments, and all other embodiments obtained by those skilled in the art without making creative efforts based on the embodiments of the present invention are included in the protection scope of the present invention.
Referring to fig. 1, the present invention provides a fusion monitoring system of a high voltage switchgear, comprising: the interference information monitoring module is used for monitoring interference information of the target high-voltage switch equipment, wherein the interference information comprises working environment parameters and fault information parameters, and further, environmental interference values and fault degree evaluation indexes of the target high-voltage switch equipment are calculated.
Specifically, the working environment parameters and the specific monitoring process are as follows: monitoring point layout is carried out on the working areas of the target high-voltage switch equipment according to the set number, and the temperature of each monitoring point in the working areas of the target high-voltage switch equipment is obtainedAnd moisture->Simultaneously, the suitable operating temperature range and the suitable operating humidity range of the target high-voltage switchgear are obtained from the high-voltage switchgear database, and the intermediate value of the range is extracted as the reference standard suitable operating temperature +.>And a reference standard suitable working humidityComprehensively calculating a temperature and humidity interference degree index of a working area of the target high-voltage switch equipment>The specific numerical calculation formula is as follows: />WhereinAnd->Respectively expressed as a set allowable deviation temperature and allowable deviation humidity, ">And->Are respectively expressed as the influence factors corresponding to the set temperature and humidity, ">Number expressed as each monitoring point, +.>，/>Expressed as the total number of monitoring points.
It should be explained that the above-mentioned monitoring of the environmental temperature and humidity respectively employs a temperature sensor and a humidity sensor, the environmental temperature has an important influence on the performance of the electrical device, the extremely high temperature or low temperature condition may cause the performance of the electrical device to be reduced, the high temperature may cause the electrical insulation material to be aged, the low temperature may cause the working speed of the electronic element to be slowed down, and the high humidity environment may cause the corrosion of the metal device, further damages the equipment performance, monitors the temperature and humidity of the working environment of the target high voltage switch device, can take effective maintenance measures for different temperature and humidity, and avoid the equipment failure or instability caused by the bad temperature and humidity condition.
Monitoring and obtaining oxygen concentration of each monitoring point in working area of target high-voltage switch equipmentAnd various corrosive gas concentrations->And matching the critical corrosion resistant gas concentration of the target high-voltage switchgear from a database of the high-voltage switchgear to obtain the critical corrosion resistant gas concentration of the target high-voltage switchgear>Comprehensively calculating harmful gas interference degree index of working area of target high-voltage switch equipment>The specific calculation expression is: />Wherein->An operation influencing factor expressed as a set unit oxygen concentration,/->Expressed as natural constant>Indicated as the number of each type of corrosive gas,，/>expressed as the total number of species of corrosive gas.
It should be explained that the above-mentioned monitoring of oxygen and various corrosive gas concentrations by using the gas sensor, oxygen and some corrosive gases may cause metal corrosion, damage insulating materials, wherein the higher oxygen concentration may oxidize equipment parts, and further cause poor electrical contact of equipment, reduce insulating performance, accelerate ageing of equipment, monitor oxygen and various corrosive gas concentrations may help to maintain equipment, and improve safety and stability of equipment.
Monitoring to obtain noise intensity of each monitoring point in working area of target high-voltage switch equipmentAnd obtaining the noise intensity of the reference allowable working area of the target high-voltage switch equipment from the high-voltage switch equipment database>Simultaneously obtaining the distance between each monitoring point and the target voltage switch equipment>Comprehensively calculating noise intensity interference degree index of working area of target high-voltage switch equipment>The specific numerical calculation formula is as follows:wherein->Expressed as the set allowable deviation noise intensity, +.>Expressed as an interference factor corresponding to the set unit noise intensity.
It should be explained that, the noise sensor is used for monitoring the noise intensity of the working area of the target high-voltage switch device, and the sound wave vibration in the high-noise environment can be transmitted to the mechanical parts of the switch device, so that the vibration and vibration of the device are caused, the abrasion and damage of the device are accelerated, the noise monitoring of the working area can help to take effective protective measures, the stable operation of the device is ensured, and the service life of the device is prolonged.
Further, the method calculates the environmental interference value of the target voltage switch equipmentThe specific calculation expression is:wherein->、/>And->The influence weight factors are respectively expressed as the set influence weight factors corresponding to the temperature and humidity interference degree, the harmful gas interference degree and the noise intensity interference degree of the working area.
In a specific embodiment, through monitoring the working environment of the high-voltage switch equipment, including monitoring the environmental temperature and humidity and monitoring the concentration of oxygen and various corrosive gases, preventive measures can be timely taken for abnormal environmental changes, adverse effects on equipment performance and stability caused by environmental factors are prevented, and then the equipment reliability and stability are improved, meanwhile, the equipment can be maintained for the working environment, the aging speed of the equipment is reduced, and the service life of the equipment is prolonged.
Specifically, the fault information parameters are specifically monitored as follows: arranging vibration monitoring points in set number, monitoring vibration signals of the target voltage switch equipment, processing the vibration signals to obtain vibration signal waveforms of all the vibration monitoring points of the target voltage switch equipment, and obtaining all the vibration intensities of all the vibration monitoring points of the target voltage switch equipmentFurther, the vibration frequency of each vibration monitoring point of the target voltage switch equipment is obtained>Simultaneously obtaining critical vibration intensity of the target high-voltage switchgear from the high-voltage switchgear database>And reference standard vibration frequency->。
Obtaining standard vibration signal waveforms of the target high-voltage switch equipment from a high-voltage switch equipment database, and extracting the length of the standard vibration signal waveformsThe vibration signal waveform of each vibration monitoring point of the target voltage switch equipment is subjected to overlap comparison with the standard vibration signal waveform, so that the overlapping length +_ of the vibration signal waveform of each vibration monitoring point of the target voltage switch equipment is obtained>。
Comprehensive calculation of vibration signal abnormality index of target voltage switch equipmentThe calculation formula is as follows:wherein->And->Respectively expressed as the set allowable deviation vibration intensity and allowable deviation vibration frequency, < >>Indicated as the number of each vibration monitoring point,，/>expressed as the total number of vibration monitoring points, +.>Indicated as the number of each vibration,，/>expressed as the total number of vibrations.
It is to be explained that the vibration sensor is used for monitoring the vibration signal of the target high-voltage switch device, and the monitoring of the vibration signal can help to timely detect mechanical problems and faults in the device, so that the device operation condition can be known, potential problems can be identified, and the device performance can be optimized.
Monitoring the working current intensity of the target high-voltage switch equipment to obtain the working current of each monitoring time point of the target high-voltage switch equipmentAnd obtaining rated working current of the target voltage switchgear from the database of the high voltage switchgearAnd simultaneously, monitoring the current signal of the target voltage switching equipment to obtain the current signal waveform of the target voltage switching equipment.
Obtaining standard current signal waveform generated by rated current of target voltage switching equipment from high voltage switching equipment database, and extracting standard current signal waveform lengthThe current signal waveform of the target voltage switching equipment is subjected to overlap comparison with the standard current signal waveform, so that the overlapping length of the current signal waveform of the target voltage switching equipment is obtained>。
Comprehensive calculation of current signal abnormality index of target voltage switch equipmentThe calculation formula is as follows:wherein->Indicated as set allowable deviation operating current, +.>And->Respectively expressed as the set current intensity and the duty ratio weight of the current signal, +.>Number expressed as each monitoring time point, +.>，/>Expressed as the total number of monitoring time points.
It is to be explained that the current sensor is used for monitoring the current signal of the target high-voltage switch device, and through analyzing the current data, the electric fault can be found in time, the problem can be rapidly diagnosed, and appropriate maintenance measures can be taken, so that the stable operation of the device is ensured.
Further, the target voltage switch equipment has specific fault degree evaluation indexThe specific calculation expression of (2) is as follows: />Wherein->And->The vibration signal abnormality index and the current signal abnormality index are respectively expressed as the duty ratio weights to which the set vibration signal abnormality index and the current signal abnormality index belong.
In a specific embodiment, by monitoring fault information of the high-voltage switching device, including vibration signal monitoring and current signal monitoring, the vibration signal monitoring can help timely detect mechanical problems and faults in the device, excessive wear and damage of the device are avoided, unnecessary periodic maintenance can be reduced through vibration monitoring, maintenance cost is reduced, meanwhile, the current signal monitoring can help analyze performance and efficiency of the device, detect electrical problems in the device, and guarantee working stability of the high-voltage switching device.
And the data integration processing center is used for comprehensively calculating the potential risk assessment index of the target high-voltage switch equipment and carrying out early warning display.
Specifically, the potential risk assessment index of the target voltage switch equipment is comprehensively calculated, early warning display is carried out, and the specific analysis process is as follows: computing a model from dataProcessing to obtain a risk potential evaluation index of the target high-voltage switch device>Wherein->And->The environmental disturbance value and the fault level evaluation index, respectively, are indicated as target high-voltage switching device, +.>And->Respectively expressed as a set environmental disturbance value and a set fault degreeAnd evaluating the influence weight factors corresponding to the indexes.
And extracting a potential risk assessment index threshold value from the high-voltage switch equipment database, comparing the potential risk assessment index of the target high-voltage switch equipment with the potential risk assessment index threshold value, and if the potential risk assessment index of the target high-voltage switch equipment is higher than the potential risk assessment index threshold value, performing early warning display on the target high-voltage switch equipment.
The operation state monitoring module is used for monitoring operation state parameters of the target high-voltage switch equipment and comprises an air box unit and a switch unit, and further sequentially evaluating an air box abnormality evaluation index and a switch abnormality evaluation index of the target high-voltage switch equipment.
Specifically, the gas tank unit is configured to perform abnormal assessment on a gas tank state of a target high-voltage switching device, and a specific analysis process is as follows: arranging gas monitoring points on the surface of the gas tank in a set number, and monitoring the concentration of SF6 gas near the gas tank to obtain the concentration of SF6 gas at each gas monitoring pointAnd acquiring SF6 gas critical concentration threshold value +.>Comprehensively calculating SF6 gas concentration abnormality evaluation index of target high-voltage switch equipment>The specific calculation expression is:wherein->Indicated as the set allowable deviation SF6 gas concentration,indicated as a set SF6 gas concentration correction factor, ">Number expressed as each gas monitoring point +.>，/>Expressed as the total number of gas monitoring points.
It should be explained that the monitoring of the concentration of SF6 gas by using the gas sensor is that SF6 gas is a gas with high electrical insulation property, and is used as an insulating medium of high-voltage electrical equipment, and leakage of SF6 gas can cause insulation performance reduction of high-voltage switching equipment, so that stable operation of equipment is affected, and monitoring of the concentration of SF6 gas on the surface of a gas tank can effectively monitor leakage condition of SF6 gas, and timely take maintenance measures to reduce occurrence of safety accidents.
Monitoring the air pressure inside the air tank of the target high-voltage switch equipment to obtain the air tank air pressure of each monitoring time point of the target high-voltage switch equipmentAnd obtaining the rated gas pressure of the target high-voltage switchgear from the database of the high-voltage switchgear>Further, an air pressure abnormality evaluation index of the target high-voltage switching device is calculated>The specific calculation expression is:wherein->Indicated as set allowable deviation air box air pressure.
It should be explained that, the pressure sensor is used to monitor the air pressure inside the air tank of the target high-voltage switch device, the air pressure of the air tank can reflect the insulation state of the device, the air tightness of the device is checked, and the potential insulation problem can be found and corrected in time by monitoring the air pressure, so that the reliability and the safety of the device are ensured.
Comprehensive calculation of gas tank abnormality evaluation index of target high-voltage switch equipmentThe specific calculation expression is:wherein->And->Respectively expressed as the duty ratio weight to which the set SF6 gas concentration abnormality evaluation index and the air pressure abnormality evaluation index belong.
Further, the switching unit is configured to perform abnormal evaluation on a switching state of the target high-voltage switching device, and the specific analysis process is as follows: monitoring loop resistance and working voltage of a switching unit of the target high-voltage switching device to obtain the working voltage of the switching unit of each monitoring time point of the target high-voltage switching deviceAnd switching element loop resistance->At the same time, the rated operating voltage of the switching unit of the target-voltage switching device is obtained from the high-voltage switching device database>And the switching unit reference loop resistance +.>Comprehensively calculating a switching abnormality evaluation index of the target voltage switching device>The specific calculation expression is: />Wherein->Andrespectively expressed as a set allowable deviation operating voltage and allowable deviation loop resistance, < >>And->Respectively expressed as the set operating voltage and the corresponding influence factors of the loop resistance.
It should be explained that, the voltage sensor and the resistance measuring instrument are used for respectively monitoring the working voltage and the loop resistance of the target high-voltage switching device, and the monitoring of the loop resistance and the working voltage can help to evaluate the performance of the high-voltage switching device, so that potential problems in the device can be found in time, and the risk of device faults is reduced.
In a specific embodiment, through monitoring the operation state of the high-voltage switch device, including gas tank unit monitoring and switch unit monitoring, monitoring the gas tank unit can discover the gas leakage problem in time, and take effective maintenance measures, and then guarantee the insulativity of the high-voltage switch device, avoid the emergence of unexpected condition because of equipment failure, monitor the switch unit and can guarantee the normal operation of the high-voltage switch device, improve the security and the stability of electric power system.
The abnormal state feedback module is used for comprehensively calculating the abnormal state index of the operation state of the target high-voltage switch equipment and carrying out warning feedback on the abnormal state.
Specifically, the operating state abnormality index of the target voltage switchgear is comprehensively calculatedThe specific calculation expression is: />Wherein->Air box abnormality evaluation index expressed as target voltage switchgear, +.>Switch abnormality assessment index expressed as target voltage switching device,/->And->The set gas tank abnormality evaluation index and the set switch abnormality evaluation index are respectively expressed as influence weight factors corresponding to the set gas tank abnormality evaluation index and the switch abnormality evaluation index.
Further, the alarm feedback is performed on the abnormal state, and the specific analysis process is as follows: extracting an operation state abnormality index threshold of the target high-voltage switch equipment from a high-voltage switch equipment database, comparing the operation state abnormality index of the target high-voltage switch equipment with the operation state abnormality index threshold, and if the operation state abnormality index of the target high-voltage switch equipment is higher than the operation state abnormality index threshold, carrying out warning feedback on the abnormality state of the target high-voltage switch equipment.
The foregoing is merely illustrative of the structures of this invention and various modifications, additions and substitutions for those skilled in the art can be made to the described embodiments without departing from the scope of the invention or from the scope of the invention as defined in the accompanying claims.
Claims (8)
1. A fusion monitoring system for a high voltage switchgear, comprising:
the interference information monitoring module is used for monitoring interference information of the target high-voltage switch equipment, wherein the interference information comprises working environment parameters and fault information parameters, and further, environmental interference values and fault degree evaluation indexes of the target high-voltage switch equipment are calculated;
the data integration processing center is used for comprehensively calculating potential risk assessment indexes of the target high-voltage switch equipment and carrying out early warning display;
the operation state monitoring module is used for monitoring operation state parameters of the target high-voltage switch equipment and comprises an air box unit and a switch unit, so that an air box abnormality evaluation index and a switch abnormality evaluation index of the target high-voltage switch equipment are sequentially evaluated;
the abnormal state feedback module is used for comprehensively calculating the abnormal state index of the operation state of the target high-voltage switch equipment and carrying out warning feedback on the abnormal state;
the high-voltage switchgear database is used for storing a proper working temperature range, a proper working humidity range, a critical corrosion resistance gas concentration tolerance, a reference allowable working area noise intensity, a critical vibration intensity, a reference standard vibration frequency, a standard vibration signal waveform, a rated working current, a standard current signal waveform, a potential risk assessment index threshold value, an SF6 gas critical concentration threshold value, a gas rated pressure, a switching unit rated working voltage, a switching unit reference loop resistance and an operation state abnormality index threshold value of the target high-voltage switchgear;
the working environment parameters are specifically monitored as follows:
monitoring point layout is carried out on the working areas of the target high-voltage switch equipment according to the set number, and the temperature of each monitoring point in the working areas of the target high-voltage switch equipment is obtainedAnd moisture->Simultaneously, the suitable operating temperature range and the suitable operating humidity range of the target high-voltage switchgear are obtained from the high-voltage switchgear database, and the intermediate value of the range is extracted as the reference standard suitable operating temperature +.>And reference standard suitable working humidity->Comprehensively calculating a temperature and humidity interference degree index of a working area of the target high-voltage switch equipment>The specific numerical calculation formula is as follows:wherein->And->Respectively expressed as a set allowable deviation temperature and allowable deviation humidity, ">And->Are respectively expressed as the influence factors corresponding to the set temperature and humidity, ">Number expressed as each monitoring point, +.>，/>Expressed as the total number of monitoring points;
monitoring and obtaining oxygen concentration of each monitoring point in working area of target high-voltage switch equipmentAnd various corrosive gas concentrations->And matching the critical corrosion resistant gas concentration of the target high-voltage switchgear from a database of the high-voltage switchgear to obtain the critical corrosion resistant gas concentration of the target high-voltage switchgear>Comprehensively calculating harmful gas interference degree index of working area of target high-voltage switch equipment>The specific calculation expression is: />Wherein->An operation influencing factor expressed as a set unit oxygen concentration,/->Expressed as natural constant>Indicated as the number of each type of corrosive gas,，/>expressed as the total number of species of corrosive gas;
monitoring to obtain noise intensity of each monitoring point in working area of target high-voltage switch equipmentAnd obtaining the noise intensity of the reference allowable working area of the target high-voltage switch equipment from the high-voltage switch equipment database>Simultaneously acquiring the positions between each monitoring point and the target voltage switch equipmentDistance of->Comprehensively calculating noise intensity interference degree index of working area of target high-voltage switch equipment>The specific numerical calculation formula is as follows:wherein->Expressed as the set allowable deviation noise intensity, +.>The interference factor is expressed as the interference factor corresponding to the set unit noise intensity;
the fault information parameters are specifically monitored as follows:
arranging vibration monitoring points in set number, monitoring vibration signals of the target voltage switch equipment, processing the vibration signals to obtain vibration signal waveforms of all the vibration monitoring points of the target voltage switch equipment, and obtaining all the vibration intensities of all the vibration monitoring points of the target voltage switch equipmentFurther, the vibration frequency of each vibration monitoring point of the target voltage switch equipment is obtained>Simultaneously obtaining critical vibration intensity of the target high-voltage switchgear from the high-voltage switchgear database>And reference standard vibration frequency->；
Obtaining standard vibration signal waveforms of the target high-voltage switch equipment from a high-voltage switch equipment database, and extracting the length of the standard vibration signal waveformsThe vibration signal waveform of each vibration monitoring point of the target voltage switch equipment is subjected to overlap comparison with the standard vibration signal waveform, so that the overlapping length +_ of the vibration signal waveform of each vibration monitoring point of the target voltage switch equipment is obtained>；
Comprehensive calculation of vibration signal abnormality index of target voltage switch equipmentThe calculation formula is as follows:wherein->And->Respectively expressed as the set allowable deviation vibration intensity and allowable deviation vibration frequency, < >>Indicated as the number of each vibration monitoring point,，/>expressed as the total number of vibration monitoring points, +.>Indicated as the number of each vibration,，/>expressed as the total number of vibrations;
monitoring the working current intensity of the target high-voltage switch equipment to obtain the working current of each monitoring time point of the target high-voltage switch equipmentAnd obtaining the rated working current of the target high-voltage switchgear from the high-voltage switchgear database>Meanwhile, monitoring a current signal of the target voltage switching equipment to obtain a current signal waveform of the target voltage switching equipment;
obtaining standard current signal waveform generated by rated current of target voltage switching equipment from high voltage switching equipment database, and extracting standard current signal waveform lengthThe current signal waveform of the target voltage switching equipment is subjected to overlap comparison with the standard current signal waveform, so that the overlapping length of the current signal waveform of the target voltage switching equipment is obtained>；
Comprehensive calculation of current signal abnormality index of target voltage switch equipmentThe calculation formula is as follows:wherein->Indicated as set allowable deviation operating current, +.>And->Respectively expressed as the set current intensity and the duty ratio weight of the current signal, +.>Number expressed as each monitoring time point, +.>，/>Expressed as the total number of monitoring time points.
2. The fusion monitoring system of a high voltage switchgear as claimed in claim 1, wherein: the method calculates the environmental interference value of the target high-voltage switch equipmentThe specific calculation expression is:wherein->、/>And->The influence weight factors are respectively expressed as the set influence weight factors corresponding to the temperature and humidity interference degree, the harmful gas interference degree and the noise intensity interference degree of the working area.
3. The fusion monitoring system of a high voltage switchgear as claimed in claim 1, wherein: the target high-voltage switch equipment, and specific fault degree evaluation index thereofThe specific calculation expression of (2) is as follows:wherein->And->The vibration signal abnormality index and the current signal abnormality index are respectively expressed as the duty ratio weights to which the set vibration signal abnormality index and the current signal abnormality index belong.
4. The fusion monitoring system of a high voltage switchgear as claimed in claim 1, wherein: the potential risk assessment index of the target high-voltage switch equipment is comprehensively calculated, early warning display is carried out, and the specific analysis process is as follows:
computing a model from dataProcessing to obtain a risk potential evaluation index of the target high-voltage switch device>Wherein->And->The environmental disturbance value and the fault level evaluation index, respectively, are indicated as target high-voltage switching device, +.>And->Respectively representing the set environmental interference value and the impact weight factor corresponding to the fault degree evaluation index;
and extracting a potential risk assessment index threshold value from the high-voltage switch equipment database, comparing the potential risk assessment index of the target high-voltage switch equipment with the potential risk assessment index threshold value, and if the potential risk assessment index of the target high-voltage switch equipment is higher than the potential risk assessment index threshold value, performing early warning display on the target high-voltage switch equipment.
5. The fusion monitoring system of a high voltage switchgear as claimed in claim 1, wherein: the gas tank unit is used for carrying out abnormal evaluation on the gas tank state of the target high-voltage switch equipment, and the specific analysis process is as follows:
arranging gas monitoring points on the surface of the gas tank in a set number, and monitoring the concentration of SF6 gas near the gas tank to obtain the concentration of SF6 gas at each gas monitoring pointAnd acquiring SF6 gas critical concentration threshold value +.>Comprehensively calculating SF6 gas concentration abnormality evaluation index of target high-voltage switch equipment>The specific calculation expression is:wherein->Indicated as the set allowable deviation SF6 gas concentration,indicated as a set SF6 gas concentration correction factor, ">Number expressed as each gas monitoring point +.>，/>Expressed as the total number of gas monitoring points;
monitoring the air pressure inside the air tank of the target high-voltage switch equipment to obtain the air tank air pressure of each monitoring time point of the target high-voltage switch equipmentAnd acquiring the rated gas pressure of the target high-voltage switchgear from the database of the high-voltage switchgearFurther, an air pressure abnormality evaluation index of the target high-voltage switching device is calculated>The specific calculation expression is:wherein->The air pressure of the air box is expressed as a set allowable deviation;
comprehensive calculation of gas tank abnormality evaluation index of target high-voltage switch equipmentThe specific calculation expression is:wherein->And->Respectively expressed as the duty ratio weight to which the set SF6 gas concentration abnormality evaluation index and the air pressure abnormality evaluation index belong.
6. The fusion monitoring system of a high voltage switchgear as claimed in claim 5, wherein: the switching unit is used for carrying out abnormal evaluation on the switching state of the target high-voltage switching equipment, and the specific analysis process is as follows:
monitoring loop resistance and working voltage of a switching unit of the target high-voltage switching device to obtain the working voltage of the switching unit of each monitoring time point of the target high-voltage switching deviceAnd switching element loop resistance->At the same time, the rated operating voltage of the switching unit of the target-voltage switching device is obtained from the high-voltage switching device database>And the switching unit reference loop resistance +.>Comprehensively calculating a switching abnormality evaluation index of the target voltage switching device>The specific calculation expression is:wherein->And->Respectively expressed as a set allowable deviation operating voltage and allowable deviation loop resistance, < >>And->Respectively expressed as the set operating voltage and the corresponding influence factors of the loop resistance.
7. The fusion monitoring system of a high voltage switchgear as claimed in claim 6, wherein: the operation state abnormality index of the target voltage switch equipment is comprehensively calculatedThe specific calculation expression is:wherein->And->The set gas tank abnormality evaluation index and the set switch abnormality evaluation index are respectively expressed as influence weight factors corresponding to the set gas tank abnormality evaluation index and the switch abnormality evaluation index.
8. The fusion monitoring system of a high voltage switchgear as claimed in claim 1, wherein: the alarm feedback is carried out on the abnormal state, and the specific analysis process is as follows:
extracting an operation state abnormality index threshold of the target high-voltage switch equipment from a high-voltage switch equipment database, comparing the operation state abnormality index of the target high-voltage switch equipment with the operation state abnormality index threshold, and if the operation state abnormality index of the target high-voltage switch equipment is higher than the operation state abnormality index threshold, carrying out warning feedback on the abnormality state of the target high-voltage switch equipment.
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