CN110412226A - A kind of high-precision gas density monitor and system based on edge calculations - Google Patents

A kind of high-precision gas density monitor and system based on edge calculations Download PDF

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Publication number
CN110412226A
CN110412226A CN201910830171.XA CN201910830171A CN110412226A CN 110412226 A CN110412226 A CN 110412226A CN 201910830171 A CN201910830171 A CN 201910830171A CN 110412226 A CN110412226 A CN 110412226A
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Prior art keywords
gas density
value
gas
edge calculations
setting
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Inventor
郭正操
黄小泵
曾伟
郝彩侠
王乐乐
金海勇
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Shanghai Leyan Electric Co Ltd
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Shanghai Leyan Electric Co Ltd
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Priority to CN201910830171.XA priority Critical patent/CN110412226A/en
Publication of CN110412226A publication Critical patent/CN110412226A/en
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N9/00—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity
    • G01N9/36—Analysing materials by measuring the density or specific gravity, e.g. determining quantity of moisture
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/0004—Gaseous mixtures, e.g. polluted air
    • G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
    • G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
    • G01N33/0031—General constructional details of gas analysers, e.g. portable test equipment concerning the detector comprising two or more sensors, e.g. a sensor array
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/0004—Gaseous mixtures, e.g. polluted air
    • G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
    • G01N33/0062—General constructional details of gas analysers, e.g. portable test equipment concerning the measuring method or the display, e.g. intermittent measurement or digital display
    • G01N33/0063—General constructional details of gas analysers, e.g. portable test equipment concerning the measuring method or the display, e.g. intermittent measurement or digital display using a threshold to release an alarm or displaying means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/0004—Gaseous mixtures, e.g. polluted air
    • G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
    • G01N33/0062—General constructional details of gas analysers, e.g. portable test equipment concerning the measuring method or the display, e.g. intermittent measurement or digital display
    • G01N33/0068—General constructional details of gas analysers, e.g. portable test equipment concerning the measuring method or the display, e.g. intermittent measurement or digital display using a computer specifically programmed
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/0004—Gaseous mixtures, e.g. polluted air
    • G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
    • G01N33/0073—Control unit therefor

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Food Science & Technology (AREA)
  • Medicinal Chemistry (AREA)
  • Combustion & Propulsion (AREA)
  • Emergency Alarm Devices (AREA)
  • Examining Or Testing Airtightness (AREA)

Abstract

The invention discloses a kind of high-precision gas density monitor and system based on edge calculations, gas density relay includes mechanical part and electronic section, and electronic section includes intelligent microprocessor, pressure sensor, temperature sensor, communication module, memory.Pressure sensor is connected to the gas circuit of the pressure monitor of mechanical part.Intelligent microprocessor is connected with temperature sensor, pressure sensor, communication module respectively, and the pressure signal of pressure sensor acquisition and the temperature signal of temperature sensor acquisition are obtained with the sample frequency of setting, corresponding gas density value P is calculated20.Intelligent microprocessor includes edge calculations unit, and edge calculations unit is obtained P20Depth calculation processing is carried out, accurate density value is obtainedAccurately on-line monitoring and fault diagnosis can be made to gas insulated electric apparatus, can be found much sooner when gas leakage occurs for gas insulated electric apparatus, ensure power grid security.

Description

A kind of high-precision gas density monitor and system based on edge calculations
Technical field
The present invention relates to technical field of electric power, and in particular to and it is a kind of to apply in high pressure, middle voltage electrical equipment, it is based on edge The high-precision gas density monitor and system of calculating.
Background technique
Currently, SF6(sulfur hexafluoride) electrical equipment has been widely used in power department, industrial and mining enterprises, promotes electric power row The fast development of industry.In recent years, with rapid economic development, China's power system capacity sharply expands, SF6Electrical equipment consumption It is more and more.SF6Effect of the gas in high voltage electric equipment is arc extinguishing and insulation, SF in high voltage electric equipment6The density of gas If reducing and micro-water content being exceeded will seriously affect SF6The safe operation of high voltage electric equipment: SF6Gas density is reduced to one Determining degree will lead to reducing or losing for insulation and arc extinction performance.
With unattended operation transformer station to networking, digitlization direction develop and to remote control, telemetering requirement constantly add By force, to SF6The gas density of electrical equipment and the on-line monitoring of micro-water content state have important practical significance.With China Smart grid is constantly greatly developed, important component and crucial section of the intelligent high-pressure electrical equipment as intelligent substation Point plays very important effect to the safety of smart grid.High voltage electric equipment is mostly SF at present6Air insulating device, If gas density reduces and (such as leak and cause) electric property that will seriously affect equipment, safe operation is caused serious hidden Suffer from.On-line monitoring SF at present6Gas density value in high voltage electric equipment is very universal, and existing gas density is supervised Examining system (gas density relay) is essentially: 1) apply telemetering type SF6Gas density relay realizes density, pressure and temperature The acquisition of degree uploads, and realizes gas density on-line monitoring；2) density, pressure and temperature are realized using gas density transmitter Acquisition uploads, and realizes gas density on-line monitoring.SF6Gas density relay is core and critical component, and current gas is close Degree relay also retain it is traditional mechanical, as the gas density relay of the patent disclosure before applicant, including pressure are examined Survey device, temperature compensating element, signal generator, signal regulation mechanism.Due to the bad environments of high voltage substation scene operation, ring Border temperature change is big, and existing mechanical density monitor precision is poor, measurement is inaccurate, can not in pressure slight change into Action is made, and micro- leakage state of electrical equipment is not reflected, it is difficult to meet the requirement for accurately measuring, precisely managing.
Edge calculations refer in the side close to object or data source header, using network, calculating, storage, application core ability The open platform being integrated provides most proximal end service nearby.Its application program is initiated in edge side, generates faster network service Response, meet industry real time business, using intelligence, security and privacy in terms of primary demand.Edge calculations technology It makes a breakthrough, it is meant that many controls will be achieved without by local device and transfer to cloud, and treatment process will be in this destination edge Computation layer is completed, this will undoubtedly greatly promote treatment effeciency, mitigate the load in cloud.
How edge calculations are utilized, developing a kind of gas density relay accurately measured that is able to achieve is those skilled in the art Member's urgent problem to be solved.
Summary of the invention
The purpose of the present invention is to provide a kind of high-precision gas density monitor and system based on edge calculations, with solution The problem of being proposed in certainly above-mentioned technical background.
To achieve the above object, the invention adopts the following technical scheme:
The application first aspect provides a kind of high-precision gas density monitor based on edge calculations.
The application the second aspect provides a kind of high-precision gas density monitor system based on edge calculations, described A kind of system high-precision gas density monitor based on edge calculations described in first aspect is constituted, or including first A kind of high-precision gas density monitor based on edge calculations described in a aspect.
A kind of high-precision gas density monitor based on edge calculations described herein, comprising: mechanical part and The relatively independent electronic section with mechanical part；Wherein,
The mechanical part includes pressure detector, temperature compensating element, at least one signal generator, Signal Regulation machine Structure, the mechanical part pass through signal generator output contact signal；
The electronic section includes intelligent microprocessor, pressure sensor, temperature sensor, communication module, memory；Institute Pressure sensor is stated to be connected in gas circuit with pressure detector；The intelligent microprocessor respectively with temperature sensor, pressure Sensor, communication module are connected, and the pressure signal and temperature sensing of pressure sensor acquisition are obtained with the sample frequency of setting Corresponding gas density value P is calculated according to gas pressure-temperature characteristic in the temperature signal of device acquisition20；The intelligence is micro- Processor includes edge calculations unit, the gas density value P that the edge calculations unit will be calculated20It carries out at depth calculation Reason, obtains accurate density value P20
Preferably, the gas density value P20It is scaled 20 DEG C of pressure value.
Preferably, the signal generator includes but is not limited to microswitch or magnetic-type electrical contact；The pressure detecting Device includes but is not limited to Baden pipe or bellows；The temperature compensating element includes but is not limited to that bimetal leaf is used to constitute Compensating element, or compensating element, filled with compensation gas.
Preferably, the depth calculation processing includes: the edge calculations unit to the gas density value P monitored20It adopts Gas density value P is calculated with mean value method (averaging method)20Average value P20 is average, the average value P20 is averageIt is exactly accurately close Angle value P20 is accurate。
It is highly preferred that the mean value method are as follows: in the time interval of setting, set frequency acquisition, will all acquire N number of gas density value of the different time points arrived carries out mean value calculation processing, obtains gas density value P20Average value P20 is average；Alternatively, time interval, set temperature interval steps in setting, collected in whole temperature ranges it is N number of not The density value of equality of temperature angle value carries out mean value calculation processing, obtains its gas density value P20Average value P20 is average；Alternatively, setting Fixed time interval, setting pressure intervals step-length, the N number of different pressures value collected in whole pressure ranges Density value carries out mean value calculation processing, obtains its gas density value P20Average value P20 is average；
Wherein, N is the positive integer more than or equal to 1.
It is highly preferred that obvious abnormal gas density value is first deleted in the averaging method, it specifically can be by setting Gas density value other than the reasonable interval range of setting is carried out delete processing by fixed reasonable interval range；Or it deletes Except at least one maximum value, and/or delete at least one minimum value.
Preferably, the depth calculation processing includes: gas density of the edge calculations unit to the certain intervals time Value P20Fourier transformation is carried out, corresponding frequency spectrum is converted into, periodic component is filtered, accurate density value is then calculated P20 is accurate。
Preferably, the depth calculation processing includes: gas density of the edge calculations unit to the certain intervals time Value P20It is trend sexual element, periodic component and random component according to Time Series, judges gas according to trend sexual element Leakage situation.
It is highly preferred that the edge calculations unit judges gases did escape, intelligent microprocessor issues alarm signal Or warning message；The alarm signal uploads to target device by signal wire, alternatively, the warning message passes through communication module Upload to target device or target platform.
Preferably, the accurate density value P20 is accurateTarget device or target platform are uploaded to by communication module；With/ Or, the accurate density value P20 is accurateCorresponding pressure value, temperature value is uploaded to target device by communication module or target is flat Platform；And/or the gas density value P20Target device or target platform are uploaded to by communication module.
Preferably, the analysis, judgement of the complete paired data of edge calculations unit and data storage, the alarm according to setting Strategy provides corresponding alarm signal.
Preferably, the edge calculations unit calculates monitored gas density value P20Long-term change trend value △ P20, setting Fixed time interval, as Long-term change trend value △ P20Below or above the Long-term change trend value △ P of setting20 settingsWhen, the gas density Relay issues alarm signal, or issues alarm contact or alert, or uploads notification information.
It is highly preferred that the Long-term change trend value △ P20Are as follows: time interval, setting frequency acquisition in setting, all N number of gas density value of the different time points collected carries out mean value calculation processing, obtains its gas density value P20It is flat Mean value P20 is average, then set trend calculating cycle TPeriod, obtain Long-term change trend value △ P20=P20 average (previous T periodic quantities)-P20 average (T periods), That is average value P20 is averageFront and back cycle TPeriodDifference；Alternatively,
In the time interval T of settingInterval, the gas density value P of the electrical equipment monitored20Long-term change trend value △ P20= P20 (the previous intervals T)-P20 (intervals T), i.e. density value P20Surrounding time interval TIntervalDifference；Alternatively,
Setting time interval TInterval, setting time length TLength, using the time interval T in settingInterval, setting frequency acquisition, N number of gas density value P of the different time points all collected20It carries out cumulative calculation and obtains aggregate-value ∑P20, become Gesture changing value △ P20=∑P20 (previous T length)-∑P20 (T length instantly), i.e. surrounding time length TLengthAggregate-value ∑P20Between difference；
Wherein, N is the positive integer more than or equal to 1.
It is highly preferred that working as gas density value P20Long-term change trend become smaller, the Long-term change trend value to become smaller is greater than or waits In the Long-term change trend value △ P of setting20 settingsWhen, intelligent microprocessor is uploaded by the alarm contact point signal line of gas density relay Exception information, alternatively, intelligent microprocessor uploads abnormal signal by communication module.
Preferably, the edge calculations unit calculates the leak rate L, the leak rate L=△ of monitored electrical equipment P20t/ t=(PBefore 20 accurate t-P20 accurate t)/t, in formula: t is the time interval of setting, △ P20tFor the density value variation in time interval t Amount, PBefore 20 accurate tFor the density value of time interval t previous moment, P20 accurate tFor the density value for having crossed time interval t moment；The gas Body relay, which timely updates, issues leak rate L notification information；Alternatively, the gas density relay timely updates and uploads leak rate L notification information.
It is highly preferred that time interval value t set by the edge calculations unit amendment leak rate L.
It is highly preferred that the edge calculations unit is by the accurate density value P20 is accurateThe density value of tonifying Qi is needed with setting P20 tonifying QiIt is compared, as the accurate density value P20 is accurateEqual to or less than the density value P for needing tonifying Qi20 tonifying QiWhen, the gas Density monitor issues tonifying Qi alarm signal, or issues tonifying Qi alarm contact, or issues tonifying Qi notification information, or uploads and mend Gas notification information.
It is highly preferred that the edge calculations unit calculates the tonifying Qi time T of monitored electrical equipmentThe tonifying Qi time, the tonifying Qi Time TThe tonifying Qi time=(P20 is accurate-P20 tonifying Qi)/L, in formula, P20 tonifying QiTo set the density value for needing tonifying Qi；The gas density relay It timely updates and issues tonifying Qi time notification information, or timely update and upload tonifying Qi temporal information.
It is highly preferred that the edge calculations unit calculates the gas gross mass Q that the gas chamber of monitored electrical equipment needsAlways =ρIt needs× V, in formula, ρIt needsFor the mass density for needing tonifying Qi, the density value P of tonifying Qi as needed20 tonifying QiAnd its gas characteristic obtains It arrives, V is the chamber volume of electrical equipment；Calculate the current gaseous mass Q of the gas chamber of monitored electrical equipmentAt present=ρAt present× V, In formula, ρAt presentFor the mass density of current gas, according to the gas density value P monitored at present20And its gas characteristic obtains；By counting The gas gross mass Q of calculatingAlwaysWith current gaseous mass QAt presentCalculate gas tonifying Qi quality QTonifying Qi=QAlways-QAt present；The gas density Relay, which timely updates, issues gas tonifying Qi quality notification information, or timely updates and upload gas tonifying Qi quality information.
Preferably, the edge calculations unit is by the accurate density value P20 is accurateWith the leakage alarm density value of setting P20 leakage alarmsIt is compared, as the accurate density value P20 is accurateEqual to or less than the leakage alarm density value P of setting20 leakage alarmsWhen, The gas density relay issues leakage alarm signal, or issues leakage alarm signal contact, or issues gas leakage notification information, Or upload gas leakage notification information；Alternatively,
The tendency component values monitored are compared the edge calculations unit with the tendency component values of setting, when When the tendency component values monitored are equal to or more than the tendency component values of setting, the gas density relay issues gas leakage Alarm signal, or leakage alarm signal contact is issued, or issue gas leakage notification information, or upload gas leakage notification information；Alternatively,
Time interval T of the edge calculations unit in settingInterval, the gas density value P that will be monitored20Long-term change trend Value △ P20With the gas density value P of setting20Long-term change trend value △ P20 settingsIt is compared, as the gas density value P monitored20 Long-term change trend value △ P20Equal to or more than set gas density value P20Long-term change trend value △ P20 settingsWhen, the gas Density monitor issues leakage alarm signal, or issues leakage alarm signal contact, or issues gas leakage notification information, or uploads leakage Gas notification information；Alternatively,
The edge calculations unit is by the leak rate L of the leak rate L monitored and settingSettingIt is compared, when what is monitored Leak rate L is equal to or more than set leak rate LSettingWhen, the gas density relay issues leakage alarm signal, or hair Leakage alarm signal contact out, or gas leakage notification information is issued, or upload gas leakage notification information.
Preferably, the gas density relay further includes electronics bulletin signal contact, the electronics bulletin signal contact It connects with the signal generator and/or in parallel, alternatively, the electronics bulletin signal contact serial or parallel connection is in signal generator In corresponding control loop；The electronics bulletin signal contact is also connected with the intelligent microprocessor；When what is monitored The gas density value of electrical equipment is below or above set density value P20 settingsWhen, the electronics bulletin signal contact occurs dynamic Make output bulletin contact point signal；Alternatively, working as the gas pressure value of monitored electrical equipment below or above set pressure Value PSettingWhen, the electronics bulletin signal contact generation movement output bulletin contact point signal；Alternatively, working as monitored electrical equipment Gas temperature angle value be below or above set temperature value TSettingWhen, the electronics bulletin signal contact generation movement output is accused Show contact point signal；Alternatively, the gas temperature angle value for working as monitored electrical equipment reaches set temperature threshold TGiven threshold, and institute Pressure value P of the gas pressure value of the electrical equipment of monitoring below or above settingSettingWhen, the electronics bulletin signal contact hair It is lively to make output bulletin contact point signal.
It is highly preferred that the bulletin contact point signal includes alarm, and/or locking.
It is highly preferred that the electronics bulletin signal contact includes electromagnetic relay, solid-state relay, the time relay, function Rate relay, silicon-controlled, electronic switch, electric contact, optocoupler, DI, metal-oxide-semiconductor field effect transistor, triode, diode, MOS FET relay One or more of device.
It is highly preferred that the pressure value P of the settingSetting, the setting temperature value TSetting, the setting temperature threshold TGiven thresholdIt can be with online modification and storage.
It is highly preferred that the gas density relay connects the data of monitoring and its information by the electronics bulletin signal Point is uploaded with the coding form of rule, and the electronics bulletin signal contact is in parallel or series in signal generator or dedicated On line or other lines.Specifically, the data and its information of the monitoring include: gas density value, pressure value, the temperature of monitoring (gas density of electrical equipment is worth that too low gas leak phenomenon, hypertonia, temperature be excessively high, gas density relay for value, exception information Itself abnormal phenomenon such as pressure sensor, temperature sensor), self diagnosis result.
Preferably, the gas density relay can input tonifying Qi event, and/or deflation test event, and can basis Corresponding tonifying Qi event, and/or deflation test event are to gas density value P20Carry out new calculating or adjustment.
It is highly preferred that the gas density relay within certain short time, monitors gas density value P20Gradually increase Greatly, it is judged as tonifying Qi event, as gas density value P20When for maximum value, it is judged as that tonifying Qi event terminates, and to accurately close Angle value P20 is accurateCarry out new calculating or adjustment.
It is highly preferred that the gas density relay within certain short time, monitors gas density value P20Under gradually Drop is judged as test (micro- water or decomposition product) event of deflating, as gas density value P20When for minimum value, it is judged as deflation test Event terminates, and to accurate density value P20 is accurateCarry out new calculating or adjustment.
It is highly preferred that the gas density relay record tonifying Qi event, and/or deflation test event.Such as record tonifying Qi Time, and/or tonifying Qi number, and/or gaseous mass.
Preferably, the gas density relay further includes indication mechanism, and the indication mechanism includes machine core, pointer and quarter Scale, the pointer are installed on the machine core and are set to before the dial, and the pointer is shown in conjunction with the dial Gas density value；And/or the indication mechanism includes the digital device or liquid crystal device that there is indicating value to show.
Preferably, the pressure sensor is fixed in pressure sensor fixing seat by insulating part sealing, pressure sensing It is insulation between the shell and pressure sensor fixing seat of device.
Preferably, as the gas density value P20Less than or equal to the density value P of setting20 settingsWhen, intelligent microprocessor is logical The alarm contact point signal line for crossing gas density relay uploads abnormal signal；Alternatively, intelligent microprocessor passes through on communication module Pass abnormal signal.
Preferably, the gas density relay further includes the micro- water sensor for monitoring the micro- water number of gas, when the micro- water of gas When value is more than setting value, the gas density relay issues excessive water content notification information, or uploads excessive water content notification information.
Preferably, the gas density relay further includes the decomposition product sensor for monitoring gas decomposition product on-line, works as gas When the content of body decomposition product is more than setting value, the gas density relay sending exceeded notification information of decomposition product content, or on Pass the exceeded notification information of decomposition product content.
Preferably, at least one temperature sensor is arranged near the temperature compensating element of the mechanical part or sets It sets on temperature compensating element, or is integrated in the temperature compensating element.Preferably, at least one described temperature sensor The one end of pressure detector close to temperature compensating element of the mechanical part is set.
Preferably, the intelligent microprocessor embeds algorithm and control program based on the embedded system of microprocessor, from The monitoring process of the dynamic entire gas density relay of control, includes all peripheral hardwares, logic and input and output.
Preferably, the intelligent microprocessor be based on general purpose computer, industrial personal computer, ARM chip, AI chip, CPU, MCU, The embedded algorithm such as FPGA, PLC etc., industrial control mainboard, embedded main control board and control program, automatically control whole process, include institute There are peripheral hardware, logic and input and output.
Preferably, the intelligent microprocessor has electric interfaces, and the electric interfaces are completed test data and stored, and/ Or test data export and/or test data print, and/or carry out data communication, and/or input analog quantity, number with host computer Word amount information.
Prevent user's misconnection from interface being caused to damage, and/or prevent electromagnetic interference it is highly preferred that the electric interfaces are equipped with Electric interfaces protect circuit.
Preferably, the gas density relay realizes test data and/or status monitoring result by communication module Remote transmission, the communication module are arranged at the shell of electronic section or at the shells of mechanical part or the communication Module is together with intelligent microprocessor integrated design.
It is highly preferred that the memory is together with intelligent microprocessor integrated design.
It is highly preferred that the communication module, memory are together with intelligent microprocessor integrated design.
It is highly preferred that the communication modes of the communication module are wire communication or wireless communication mode.
Further, the wire communication mode includes RS232 bus, RS485 bus, CAN-BUS bus, optical fiber ether One or more of net, 4-20mA, Hart, IIC, SPI, Wire, coaxial cable, PLC power carrier, cable.
Further, the wireless communication mode includes 5G/NB-IOT communication module (such as 5G, NB- built in sensor IOT), 2G/3G/4G/5G, WIFI, bluetooth, Lora, Lorawan, Zigbee, infrared, ultrasonic wave, sound wave, satellite, light wave, amount One or more of son communication, sonar.
Preferably, the edge calculations unit further includes analysis system (for example, technocracy analysis system), close to gas Angle value monitoring, equipment gas leakage, gas density relay performance, monitoring element are tested and analyzed, are determined.
Preferably, the pressure sensor, the temperature sensor are integrated.
Preferably, the gas density relay further includes the electric field shielding part that shielding action is played to electric field, the electric field Shielding part is arranged outside pressure sensor and/or electronic section；And/or
The gas density relay further includes the magnetic field shielding part that shielding action is played to magnetic field, and the magnetic field shielding part is set It sets outside pressure sensor and/or electronic section.
Above-mentioned shielding part utilizes the reflection and/or absorption of shielding material, and to reduce EMI radiation, shielding material adds Unnecessary gap can be effectively reduced or remove by setting, and inhibited electromagnetic coupling radiation, reduced electromagnetic leakage and interference；It can be used higher Conductive, magnetic property material generally requires shielding properties up to 40~60dB as electromagnetic shielding material (such as iron), particularly as being Electronic section is sealed in one in shell made of shielding material, good sealing can overcome leading due to gap Electric discontinuity generates interference problem caused by electromagnetic leakage.
Preferably, the control of the intelligent microprocessor is by field control, and/or passes through the background monitoring terminal control System.
Preferably, the gas density relay further includes the display interface for human-computer interaction, and real-time display is current Data, and/or support data input.Specifically, including real-time online gas density value is shown, pressure value is shown, temperature value is shown Show, analysis of trend, the inquiry of historical data, Real-time Alarm etc..
It is highly preferred that the gas density relay supports the input of density monitor essential information, the density monitor Essential information includes but is not limited to one of factory number, required precision, nominal parameter, manufactory, running position or several Kind.
Preferably, the gas density relay further includes at least one insulating part, and the insulating part is set to the pressure Between sensor and its shell；Alternatively, the insulating part is set between the pressure sensor and the shell of mechanical part, or Person, the insulating part are set between the shell of the pressure sensor and the shell of the gas density relay.
Preferably, the edge calculations unit has the accurate density value P of multiple and different time intervals20 is accurate。
It is highly preferred that the accurate density value P of the multiple different time intervals20 is accurateTarget is uploaded to by communication module Equipment or target platform.
Compared with prior art, technical solution of the present invention has the advantages that
A kind of high-precision gas density monitor and system based on edge calculations is provided, intelligent microprocessor operation is passed through Processing obtains the gas density value P of monitored electrical equipment20, the edge calculations unit of intelligent microprocessor is to gas density value P20Depth calculation processing is carried out, accurate density value P is obtained20 is accurate。P20 is accurateWhen for reflecting electrical equipment longtime running, electrically The gas density state of value of equipment gas chamber is suitable for monitoring the micro- leakage state or medium-sized gas leakage state of electrical equipment, and reflection is electrical The gas density value variation tendency of equipment gas chamber；P20For reflecting the current operating condition of electrical equipment, it is electrical to be suitable for monitoring The big leakage state of equipment reflects the great gas leakage event of electrical equipment in time.The application can make gas insulated electric apparatus Accurately on-line monitoring and fault diagnosis can be found much sooner when gas leakage occurs for gas insulated electric apparatus, ensure electricity Net safety.
Detailed description of the invention
Attached drawing is constituted part of this application to be used to provide further understanding of the present application, the schematic implementation of the application Example and its explanation are not constituted an undue limitation on the present application for explaining the application.In the accompanying drawings:
Fig. 1 is a kind of side structure signal of high-precision gas density monitor based on edge calculations of embodiment one Figure；
Fig. 2 is a kind of Facad structure signal of high-precision gas density monitor based on edge calculations of embodiment one Figure；
Fig. 3 is a kind of functional block diagram of high-precision gas density monitor based on edge calculations of embodiment one；
Fig. 4 is a kind of structural representation of high-precision gas density monitor system based on edge calculations of embodiment two Figure；
Fig. 5 is a kind of structural representation of high-precision gas density monitor system based on edge calculations of embodiment three Figure.
Specific embodiment
The present invention provides a kind of high-precision gas density monitor and system based on edge calculations, to make mesh of the invention , technical solution and effect it is clearer, clear, referring to the drawings and give an actual example that the present invention is described in more detail.It answers Work as understanding, described herein specific examples are only used to explain the present invention, is not intended to limit the present invention.
It should be noted that description and claims of this specification and term " first " in above-mentioned attached drawing, " Two " etc. be to be used to distinguish similar objects, without being used to describe a particular order or precedence order, it should be appreciated that is used in this way Data be interchangeable under appropriate circumstances.In addition, term " includes " and " having " and their any deformation, it is intended that Cover it is non-exclusive include, for example, containing the process, method, system, product or equipment of a series of steps or units need not limit In step or unit those of is clearly listed, but may include be not clearly listed or for these process, methods, produce The other step or units of product or equipment inherently.
Embodiment one:
Fig. 1 and Fig. 2 is a kind of structural representation of high-precision gas density monitor based on edge calculations of embodiment one Figure.As shown in Figure 1 and Figure 2, a kind of high-precision gas density monitor based on edge calculations, including mechanical part 1 and with machinery The relatively independent electronic section 2 in part.
Mechanical part 1 includes: mechanical part shell 101, and is set to the intracorporal pedestal 102 of the mechanical part shell, end Seat 108, pressure detector 103, temperature compensating element 104, machine core 105, pointer 106, dial 1012, end seat 108, signal tune Save mechanism 107, several signal generators 109.Wherein, one end of pressure detector 103 and one end of temperature compensating element 104 are equal Be fixed in end seat 108, the other end of pressure detector 103 is sealedly connected on pedestal 102, temperature compensating element 104 it is another One end is referred to by showing that connecting rod is connect with machine core 105 or the other end of temperature compensating element 104 is directly connect with machine core 105 Needle 106 is installed on machine core 105 and is set to before dial 1012.The signal generator 109 can using microswitch or Magnetic-type electrical contact passes through the contact point signal of 109 output gas density monitor of signal generator.The pressure detector 103 Baden pipe or bellows can be used.Temperature compensating element 104 can be using compensating plate or the gas of shell inner sealing.
Electronic section 2 includes: temperature sensor 3, electronic section shell 2010, and is set to the electronic section shell Pressure sensor 201, intelligent microprocessor 202, communication module 4, power supply (power module) 203 in 2010.The pressure passes Sensor 201 is connected by insulating part 204,205,206 with sensor outer housing 207 and sensor fixing seat 209；Or it is described Pressure sensor 201 is fixed in pressure sensor fixing seat 209 by the sealing of several insulating parts 204,205,206, the pressure Force snesor 201 is connected in gas circuit with pressure detector 103.The mechanical part is arranged in the temperature sensor 3 Temperature compensating element 104 is nearby or setting is on temperature compensating element 104, or is integrated in the temperature compensating element 104. The mechanical part shell 101 and electronic section shell 2010 are mutually indepedent or separate that the intelligent microprocessor 202 is divided It is not connected with temperature sensor 3, pressure sensor 201, communication module 4.Shielding is internally provided in sensor outer housing 207 Part 208, to improve the anti-interference ability of gas density relay；In the inside of electronic section shell 2010, (or external) is set simultaneously It is equipped with shielding part 2011, further increases the anti-interference ability of gas density relay.
Gas density relay can also include: oil-filled type density monitor, without oil type density monitor, gas density Table, gas density switch or gas gauge.In the gas density relay of the present embodiment, it is based on pressure detector 103 And the pressure and temperature changed using 104 Duis of temperature compensating element is modified, with the change of reflection (sulfur hexafluoride) gas density Change.I.e. under the pressure effect of measured medium (sulfur hexafluoride) gas, because of the effect of temperature compensating element 104, (hexafluoro Change sulphur) gas density value variation when, the pressure value of (sulfur hexafluoride) gas also changes accordingly, forces pressure detector 103 End generates corresponding flexible deformation displacement, by means of temperature compensating element 104, passes to machine core 105, machine core 105 transmits again To pointer 106, tested sulfur hexafluoride gas density value is indicated on dial 1012 then.Signal generator 109 is made For output alarm blocking contact signal.Gas density relay can show (sulfur hexafluoride) gas density value in this way .If gas leakage, sulfur hexafluoride gas density value is had dropped, and pressure detector 103 generates corresponding reversed displacement, passes through temperature Compensating element, 104 to be spent, machine core 105 is passed to, machine core 105 passes to pointer 106 again, and pointer 106 is just walked toward the small direction of indicating value, It is particularly shown gas leakage degree on dial 1012, and by the output of signal generator 109 (alarm locking) contact point signal, leads to The sulfur hexafluoride gas density in the equipment such as theory of mechanics monitoring and control electric switch is crossed, electrical equipment trouble free service is made.
The edge calculations unit of the intelligent microprocessor 202 has the accurate density value of multiple and different time intervals P20 is accurate.For example, the accurate density value P of multiple and different time intervals20 is accurateRespectively correspond the accurate of an annual time interval Density value P20 accurate years, respectively correspond the accurate density value P of season time interval20 accurate seasons, respectively correspond a monthly time The accurate density value P at intervalThe 20 accurate moons, respectively correspond the accurate density value P at a week period interval20 accurate weeks, respectively correspond The accurate density value P of one one day time interval20 accurate days.The accurate density value P of multiple and different time intervals20 is accurate Target device or target platform are uploaded to by communication module, and then realizes that the gas of more accurately on-line monitoring electrical equipment is close Angle value.In general, density value P20 accurate yearsWith density value P20 accurate seasonsIt is suitable for the judgement of the electrical equipment of micro- leakage；And density value PThe 20 accurate moonsWith density value P20 accurate weeksIt is suitable for the judgement of the electrical equipment of medium-sized gas leakage；And density value P20 accurate daysWith density value P20It is (real When) be suitable for great gas leakage electrical equipment judgement.It is calculated by multistage, multilayer monitoring guarantees safety, and improve accurate Performance, while also innovatively solving the problems, such as problem in the industry: the temperature difference between gas density relay and the gas chamber of electrical equipment.
Fig. 3 is a kind of principle frame of high-precision gas density monitor based on edge calculations of the embodiment of the present invention one Figure.As shown in figure 3, intelligent microprocessor 202 may is that general purpose computer, industrial personal computer, CPU, single-chip microcontroller, ARM chip, AI core Piece, quantum chip, photon chip, MCU, FPGA, PLC etc., industrial control mainboard, embedded main control board etc.；Power supply 203 may is that out Powered-down source, alternating current 220V, DC power supply, LDO, programmable power supply, solar energy, battery, rechargeable battery, battery etc..Intelligence is micro- Processor 202 acquires pressure signal P by pressure sensor 201 and utilizes SF by 3 temperature collection signal T of temperature sensor6 Corresponding gas density value P is calculated using the method for hard measurement in the mathematical model of relationship between gas pressure and temperature20 (i.e. 20 DEG C of pressure value P20), and being capable of teletransmission gas density value P by communication module 420Or gas density value P20, pressure Value, temperature value or pressure value, temperature value, and then realize the gas density value P of on-line monitoring electrical equipment20Or gas density value P20, pressure value, temperature value or pressure value, temperature value.Such as gas density relay is connect by data communication methods such as RS-485 Enter into integrated automation of transformation stations on-line monitoring system, and teletransmission is to unattended station central monitoring station, it is local in substation Real-time monitoring is carried out with the central monitoring station in a distant place, realizes SF6SF in electrical equipment6The on-line monitoring of gas density.
The technology of the present invention product, since the temperature sensor 3 and temperature compensating element 104 are set together；Or it is described Temperature sensor 3 is set up directly on temperature compensating element 104；Or the temperature sensor 3 is arranged in temperature compensating element 104 Near, so that the temperature that the mechanical part of gas density relay detects is consistent with the temperature that electronic section detects, greatly improve The measuring accuracy of gas density relay, by design treatment new in this way, the performance of gas density relay greatly improves.
In addition, the gas density relay further includes thermal insulator 5, the thermal insulator 5 is arranged in mechanical part shell 101 Between electronic section shell 2010；Or the thermal insulator is arranged at power supply (power module).The power supply (power module) 203 in position far from temperature sensor 3 and temperature compensating element 104.
The electronic section of the density monitor further includes shielding part 2011, the shielding part 2011 can to electric field and/ Or shielding action is played in magnetic field.The shielding part 2011 is arranged in inside or outside electronic section shell 2010.The pressure Sensor 201 is equipped with shielding part 208.The intelligent microprocessor 202 and/or communication module 4 are equipped with shielding part.
The gas density relay further includes several insulating parts, realizes the pressure sensor by several insulating parts 201 with electronic section shell 2010, mechanical part shell 101 be insulation；Or the sensor outer housing 207 and gas density The shell of relay is insulation.By such innovative design and processing, the performance of gas density relay is greatly improved.
Specifically pass through contrast test, as it can be seen from table 1 using the precision of the gas density relay of the art of this patent, Anti-interference ability and stability are more preferable than the gas density relay of the prior art, can increase substantially gas density relay Precision and anti-interference ability, ensure the reliable and secure operation of power grid.
The performance comparison table of the gas density relay of the gas density relay and prior art of 1 the application of table
In addition, filled with shock liquid, mechanical part shell in the mechanical part shell 101 of the application gas density relay Extraction wire seal is additionally provided in body 101, the connecting line of the temperature sensor 3 is by drawing wire seal and the micro- place of intelligence Reason device 202 is connected.The gas density relay further includes equipment jointing 1010, and the equipment jointing setting exists On mechanical part 1 or electronic section 2.The communication module 4 is arranged at electronic section shell 2010 or mechanical part shell 101 Together with 202 integrated design of intelligent microprocessor, the gas density relay passes through for place or the communication module 4 Communication module 4 realizes the information such as remote transmitting test data and/or result, and the communication modes of communication module 4 can be wired Or wireless mode.The setting of pressure sensor 201 is in electronic section shell 2010 or in mechanical part shell 101.It is described Intelligent microprocessor 202 embeds algorithm based on the embedded system of microprocessor and control program, automatic control entirely monitored Journey includes all peripheral hardwares, logic and input and output.The intelligent microprocessor 202 is based on general purpose computer, industrial personal computer, ARM core The embedded algorithm such as piece, AI chip, CPU, MCU, FPGA, PLC etc., industrial control mainboard, embedded main control board and control program, it is automatic to control Entire monitoring process is made, includes all peripheral hardwares, logic and input and output.
The intelligent microprocessor 202 acquires pressure sensor 201, the pressure signal of temperature sensor 3, temperature signal, 20 DEG C of pressure value P is converted into according to gas characteristic20(i.e. gas density value P20), i.e., gas density relay have pressure, Temperature measurement and software scaling function.The intelligent microprocessor 202 can measure the gas of relative pressure and absolute pressure type Density monitor.The gas density relay is with human-computer interaction function: having data display interface, can refresh in real time current Data value；With data input function, pre-set parameter can be inputted.The intelligent microprocessor 202 has electric interfaces, can To complete test data storage；And/or test data export；And/or test data is printable；And/or it can be carried out with host computer Data communication；And/or analog quantity, digital information can be inputted.The electric interfaces of the gas density relay are with protection function Can, misconnection not will cause interface damage；Or/and it not will receive the interference of electromagnetic field.Gas density relay further includes that multi-pass connects The electronic section 2 of head, the gas density relay is arranged on multiple-pass joint；Alternatively, the gas density relay also wraps Multiple-pass joint, Self-sealing valve are included, the electronic section 2, Self-sealing valve are mounted on multiple-pass joint.The pressure detector 103, Pressure sensor 201 is linked together by connecting tube.The mechanical part of gas density relay is arranged in the electronic section 2 Behind shell 101 or on shell or on equipment jointing 1010.It further include clock, clock setting is in intelligent microprocessor On 202, the testing time can recorde.The power supply (power module) 203 further include power supply circuit perhaps battery or Power supply or induction power supply that recyclable rechargeable battery or solar energy or mutual inductor take electricity to obtain etc..Intelligent microprocessor 202 Control can by field control, can also by Background control, or both mutually interaction complete control.Gas density relay Shown with data such as real-time online gas density value, pressure value, temperature values, analysis of trend, the inquiry of historical data, in real time The functions such as alarm.It include protection component, especially anti-interference component on the circuit of the intelligent microprocessor 202.It is described Gas density relay further includes micro- water sensor, can monitor the micro- water number of gas on-line.The gas density relay also wraps Decomposition product sensor is included, gas decomposition product can be monitored on-line.The gas density relay has self-diagnostic function, can be right The bulletins such as abnormal timely bulletin, such as broken string, short-circuit alarming, sensor degradation.The density of gas density relay is monitored on-line When having raising trend to gas pressure, it should propose abnormal bulletin in time.Gas density relay further includes camera, to gas Density monitor is monitored itself.Gas density relay contains the protection to electronic component environment temperature, prevents too low Temperature or excessive temperature work, make its work within the temperature range of permission, for example, heater and/or radiator can be set (fan), the heater in low temperature open radiator (fan) at high temperature, guarantee pressure sensor 201 and/or integrate The electronic components such as circuit can under low temperature or hot environment reliably working.Gas density relay has data analysis, data Processing function can carry out corresponding fault diagnosis and prediction to electrical equipment, density monitor itself.
Embodiment two:
Fig. 4 is a kind of high-precision gas density monitor system based on edge calculations of the embodiment of the present invention two.Such as Fig. 4 It is shown, multiple high voltage electric equipments equipped with sulfur hexafluoride air cell, multiple gas density relays pass sequentially through hub, IEC61850 protocol converter is connect with background monitoring terminal.Wherein, each gas density relay is separately positioned on corresponding On the high voltage electric equipment of sulfur hexafluoride air cell.
In the present embodiment, background monitoring terminal PC by hub HUB0 and multiple hub HUB (HUB1, HUB2 ... HUBm it) communicates.Each one group of gas density relay of hub HUB connection, such as hub HUB1 connection gas density relay Z11, Z12 ... Z1n, hub HUB2 connection gas density relay Z21, Z22 ... Z2n ... ..., hub HUBm connect Connect gas density relay Zm1, Zm2 ... Zmn, wherein m, n are natural number.
Background monitoring terminal includes: 1) daemon software platform: based on Windows, Linux and other etc. or VxWorks, Android,Unix,UCos,FreeRTOS,RTX,embOS,MacOS.2) daemon software key business module: such as permission pipe Reason, equipment management, data are stored in inquiry etc. and user management, alarming and managing, real time data, historical data, in real time song Line, history curve, configuration management, data acquisition, data parsing, record condition, abnormality processing etc..3) interface configuration: such as The interface Form, web interface, configuration interface etc..
Embodiment three:
Fig. 5 is a kind of high-precision gas density monitor system based on edge calculations of the embodiment of the present invention three.This reality It applies example and increases network switch Gateway, integrated application server S erver, protocol converter/online prison compared with embodiment two Survey intelligent cell ProC.In the present embodiment, background monitoring terminal PC passes through two integrated applications of network switch Gateway connection Server S erver1, Server2, two integrated application server Ss erver1, Server2 pass through station level A net and B net and more A protocol converter/on-line monitoring intelligent cell ProC (ProC1, ProC2 ... ProCn) communication, protocol converter/online It monitors intelligent cell ProC and passes through R5485 network and multiple hub HUB (HUB1, HUB2 ... HUBm) communication.Each line concentration Device HUB one group of gas density relay of connection, as hub HUB1 connection gas density relay Z11, Z12 ... Z1n, collection Line device HUB2 connection gas density relay Z21, Z22 ... Z2n ... ..., hub HUBm connection gas density relay Zm1, Zm2 ... Zmn, wherein m, n are natural number.
In conclusion a kind of high-precision gas density monitor and system based on edge calculations described herein, leads to It crosses intelligent microprocessor calculation process and obtains the gas density value P of monitored electrical equipment20, the edge meter of intelligent microprocessor Unit is calculated to gas density value P20Depth calculation processing is carried out, accurate density value P is obtained20 is accurate。P20 is accurateIt is electrically set for reflecting When standby longtime running, the gas density state of value of electrical equipment gas chamber is suitable for monitoring micro- leakage state or medium-sized of electrical equipment Gas leakage state reflects the gas density value variation tendency of electrical equipment gas chamber；P20For reflecting the current operation feelings of electrical equipment Condition is suitable for monitoring the big leakage state of electrical equipment, reflects the great gas leakage event of electrical equipment in time.Meanwhile the application will Temperature sensor and temperature compensating element are set together；Or temperature sensor is set up directly on temperature compensating element；Or Temperature sensor is arranged near temperature compensating element, so that temperature and electricity that the mechanical part of gas density relay detects The temperature of subdivision detection is consistent, and solve problem in the industry: the temperature difference between gas density relay and the gas chamber of electrical equipment is asked Topic.In short, the application can make accurately on-line monitoring and fault diagnosis to gas insulated electric apparatus, when gas-insulated is electrical Equipment occurs to find much sooner when gas leakage, very big help is provided for production maintenance, has ensured the reliable and secure fortune of power grid Row.
A kind of high-precision gas density monitor based on edge calculations refers to integrated gas density relay Device or split settings gas density detecting device are (by traditional density relay+high-precision gas pick-up based on edge calculations Device) or the gas density that is made of traditional density relay, multiple-pass joint, pressure-temperature sensor, intelligent microprocessor etc. supervise Survey device.
Specific embodiments of the present invention are described in detail above, but it is merely an example, the present invention is simultaneously unlimited It is formed on particular embodiments described above.To those skilled in the art, any couple of present invention carries out equivalent modifications and Substitution is also all among scope of the invention.Therefore, without departing from the spirit and scope of the invention made by equal transformation and Modification, all should be contained within the scope of the invention.

Claims (29)

1. a kind of high-precision gas density monitor based on edge calculations characterized by comprising mechanical part, Yi Jiyu The relatively independent electronic section of mechanical part；Wherein,
The mechanical part includes pressure detector, temperature compensating element, at least one signal generator, signal regulation mechanism, The mechanical part passes through signal generator output contact signal；
The electronic section includes intelligent microprocessor, pressure sensor, temperature sensor, communication module, memory；The pressure Force snesor is connected in gas circuit with pressure detector；The intelligent microprocessor respectively with temperature sensor, pressure sensing Device, communication module are connected, and obtain the pressure signal of pressure sensor acquisition with the sample frequency of setting and temperature sensor is adopted Corresponding gas density value P is calculated according to gas pressure-temperature characteristic in the temperature signal of collection20；The intelligence micro process Device includes edge calculations unit, the gas density value P that the edge calculations unit will be calculated20Depth calculation processing is carried out, Obtain accurate density value P20 is accurate。
2. a kind of high-precision gas density monitor based on edge calculations according to claim 1, it is characterised in that: institute Stating signal generator includes but is not limited to microswitch or magnetic-type electrical contact；The pressure detector includes but is not limited to bar Step on pipe or bellows；The temperature compensating element include but is not limited to use bimetal leaf constitute compensating element, or filled with The compensating element, of compensation gas.
3. a kind of high-precision gas density monitor based on edge calculations according to claim 1, which is characterized in that institute Stating depth calculation processing includes: the edge calculations unit to the gas density value P monitored20It is calculated using mean value method Gas density value P20Average valueThe average valueIt is exactly accurate density valueWherein,
The mean value method are as follows: in the time interval of setting, set frequency acquisition, the different time points that will all collect N number of gas density value carry out mean value calculation processing, obtain gas density value P20Average valueAlternatively,
Time interval, set temperature interval steps in setting, the N number of different temperatures collected in whole temperature ranges The density value of value carries out mean value calculation processing, obtains its gas density value P20Average valueAlternatively,
Time interval, setting pressure intervals step-length in setting, the N number of difference collected in whole pressure ranges The density value of pressure value carries out mean value calculation processing, obtains its gas density value P20Average value
Wherein, N is the positive integer more than or equal to 1.
4. a kind of high-precision gas density monitor based on edge calculations according to claim 1, which is characterized in that institute Stating depth calculation processing includes: gas density value P of the edge calculations unit to the certain intervals time20Carry out Fourier's change It changes, is converted into corresponding frequency spectrum, periodic component is filtered, accurate density value is then calculated
5. a kind of high-precision gas density monitor based on edge calculations according to claim 1, which is characterized in that institute Stating depth calculation processing includes: gas density value P of the edge calculations unit to the certain intervals time20According to time series point Solution is trend sexual element, periodic component and random component, judge gas leakage situation according to trend sexual element, i.e., when being monitored Tendency component values when being equal to or more than the tendency component values of setting, the gas density relay issues leakage alarm letter Number, or leakage alarm signal contact is issued, or issue gas leakage notification information, or upload gas leakage notification information.
6. a kind of high-precision gas density monitor based on edge calculations according to claim 1, it is characterised in that: institute State accurate density valueTarget device or target platform are uploaded to by communication module；And/or the accurate density ValueCorresponding pressure value, temperature value are uploaded to target device or target platform by communication module；And/or the gas Density value P20Target device or target platform are uploaded to by communication module.
7. a kind of high-precision gas density monitor based on edge calculations according to claim 1, it is characterised in that: institute It states edge calculations unit and calculates monitored gas density value P20Long-term change trend value △ P20, in the time interval of setting, when becoming Gesture changing value △ P20Below or above the Long-term change trend value of settingWhen, the gas density relay issues alarm signal Number, or alarm contact or alert are issued, or upload notification information.
8. a kind of high-precision gas density monitor based on edge calculations according to claim 7, which is characterized in that institute State Long-term change trend value △ P20Are as follows: time interval, setting frequency acquisition in setting, the different time points all collected N number of gas density value carry out mean value calculation processing, obtain its gas density value P20Average valueThen setting becomes Gesture calculating cycle TPeriod, obtain Long-term change trend valueThat is average valueBefore Cycle T afterwardsPeriodDifference；Alternatively,
In the time interval T of settingInterval, the gas density value P of the electrical equipment monitored20Long-term change trend valueThat is density value P20Surrounding time interval TIntervalDifference；Alternatively,
Setting time interval TInterval, setting time length TLength, using the time interval T in settingInterval, setting frequency acquisition, entirely The N number of gas density value P for the different time points that portion collects20It carries out cumulative calculation and obtains aggregate-value ∑P20, obtain trend change Change valueThat is surrounding time length TLengthAggregate-value ∑P20Between difference；
Wherein, N is the positive integer more than or equal to 1.
9. a kind of high-precision gas density monitor based on edge calculations according to claim 7, it is characterised in that: when Gas density value P20Long-term change trend become smaller, the Long-term change trend value to become smaller be greater than or equal to setting Long-term change trend valueWhen, intelligent microprocessor uploads exception information by the alarm contact point signal line of gas density relay, alternatively, intelligence Energy microprocessor uploads abnormal signal by communication module.
10. a kind of high-precision gas density monitor based on edge calculations according to claim 1, it is characterised in that: The edge calculations unit calculates the leak rate L of monitored electrical equipment, the leak rateIn formula: t is the time interval of setting, △ P20tIt is close in time interval t Angle value variable quantity,For the density value of time interval t previous moment,To have crossed the close of time interval t moment Angle value；The gas relay, which timely updates, issues leak rate L notification information；Alternatively, the gas density relay is in time more It is new to upload leak rate L notification information.
11. a kind of high-precision gas density monitor based on edge calculations according to claim 10, it is characterised in that: The edge calculations unit is by the accurate density valueThe density value of tonifying Qi is needed with settingIt is compared, when The accurate density valueEqual to or less than the density value for needing tonifying QiWhen, the gas density relay hair Tonifying Qi alarm signal out, or tonifying Qi alarm contact is issued, or issue tonifying Qi notification information, or upload tonifying Qi notification information； And/or
The edge calculations unit calculates the tonifying Qi time T of monitored electrical equipmentThe tonifying Qi time, the tonifying Qi timeIn formula,To set the density value for needing tonifying Qi；The gas density relay Device, which timely updates, issues tonifying Qi time notification information, or timely updates and upload tonifying Qi temporal information；And/or
The edge calculations unit calculates the gas gross mass Q that the gas chamber of monitored electrical equipment needsAlways=ρIt needs× V, formula In, ρIt needsFor the mass density for needing tonifying Qi, the density value of tonifying Qi as neededAnd its gas characteristic obtains, V is electrical The chamber volume of equipment；Calculate the current gaseous mass Q of the gas chamber of monitored electrical equipmentAt present=ρAt present× V, in formula, ρAt presentFor The mass density of gas at present, according to the gas density value P monitored at present20And its gas characteristic obtains；Gas calculated Gross mass QAlwaysWith current gaseous mass QAt presentCalculate gas tonifying Qi quality QTonifying Qi=QAlways-QAt present；The gas density relay is timely It updates and issues gas tonifying Qi quality notification information, or timely update and upload gas tonifying Qi quality information.
12. a kind of high-precision gas density monitor based on edge calculations according to claim 10, it is characterised in that: The edge calculations unit is by the leak rate L of the leak rate L monitored and settingSettingIt is compared, as the leak rate L monitored Equal to or more than set leak rate LSettingWhen, the gas density relay issues leakage alarm signal, or issues gas leakage report Alert signal contact, or gas leakage notification information is issued, or upload gas leakage notification information.
13. a kind of high-precision gas density monitor based on edge calculations according to claim 1, it is characterised in that: The gas density relay further includes electronics bulletin signal contact, the electronics bulletin signal contact and the signal generator Series connection and/or parallel connection, alternatively, control loop of the electronics bulletin signal contact serial or parallel connection corresponding to signal generator On；The electronics bulletin signal contact is also connected with the intelligent microprocessor；When the gas of the electrical equipment monitored is close Angle value is below or above set density value P20 settingsWhen, the electronics bulletin signal contact generation movement output bulletin contact letter Number；Alternatively, working as the gas pressure value of monitored electrical equipment below or above set pressure value PSettingWhen, the electronics Bulletin signal contact generation movement output bulletin contact point signal；Alternatively, the gas temperature angle value for working as monitored electrical equipment is lower than Or higher than set temperature value TSettingWhen, the electronics bulletin signal contact generation movement output bulletin contact point signal；Alternatively, When the gas temperature angle value of the electrical equipment monitored reaches set temperature threshold TGiven threshold, and the electrical equipment monitored Pressure value P of the gas pressure value below or above settingSettingWhen, the electronics bulletin signal contact generation movement output bulletin connects Point signal；
Wherein, the bulletin contact point signal includes alarm, and/or locking.
14. a kind of high-precision gas density monitor based on edge calculations according to claim 13, it is characterised in that: The electronics bulletin signal contact includes electromagnetic relay, solid-state relay, the time relay, power relay, silicon-controlled, electric One or more of sub switch, electric contact, optocoupler, DI, metal-oxide-semiconductor field effect transistor, triode, diode, MOS FET relay.
15. a kind of high-precision gas density monitor based on edge calculations according to claim 13, it is characterised in that: The gas density relay is by the data of monitoring and its information by the electronics bulletin signal contact with the coding shape of rule Formula is uploaded, and the electronics bulletin signal contact is in parallel or series on signal generator or industrial siding or other lines.
16. a kind of high-precision gas density monitor based on edge calculations according to claim 11, it is characterised in that: The gas density relay can input tonifying Qi event, and/or deflation test event, and can according to corresponding tonifying Qi event, And/or deflation test event is to gas density value P20Carry out new calculating or adjustment.
17. a kind of high-precision gas density monitor based on edge calculations according to claim 1, it is characterised in that: The gas density relay further includes indication mechanism, and the indication mechanism includes machine core, pointer and dial, the pointer peace Loaded on the machine core and before being set to the dial, the pointer shows gas density value in conjunction with the dial；And/or The indication mechanism includes the digital device or liquid crystal device that there is indicating value to show.
18. a kind of high-precision gas density monitor based on edge calculations according to claim 1, it is characterised in that: As the gas density value P20Less than or equal to the density value of settingWhen, intelligent microprocessor passes through gas density relay The alarm contact point signal line of device uploads abnormal signal；Alternatively, intelligent microprocessor uploads abnormal signal by communication module.
19. a kind of high-precision gas density monitor based on edge calculations according to claim 1, it is characterised in that: The gas density relay further includes the micro- water sensor for monitoring the micro- water number of gas, when the micro- water number of gas is more than setting value, The gas density relay issues excessive water content notification information, or uploads excessive water content notification information；And/or
The gas density relay further includes the decomposition product sensor for monitoring gas decomposition product on-line, when containing for gas decomposition product When amount is more than setting value, the gas density relay issues the exceeded notification information of decomposition product content, or uploads decomposition product content Exceeded notification information.
20. a kind of high-precision gas density monitor based on edge calculations according to claim 1, it is characterised in that: At least one temperature sensor is arranged near the temperature compensating element of the mechanical part or is arranged in temperature compensating element On, or be integrated in the temperature compensating element.
21. a kind of high-precision gas density monitor based on edge calculations according to claim 1, it is characterised in that: The intelligent microprocessor embeds algorithm and control program based on the embedded system of microprocessor, and it is close to automatically control entire gas The monitoring process of relay is spent, includes all peripheral hardwares, logic and input and output.
22. a kind of high-precision gas density monitor based on edge calculations according to claim 1, it is characterised in that: The intelligent microprocessor has electric interfaces, and the electric interfaces complete test data storage and/or test data export, And/or test data printing, and/or data communication, and/or input analog quantity, digital information are carried out with host computer.
23. a kind of high-precision gas density monitor based on edge calculations according to claim 1, it is characterised in that: The gas density relay realizes the remote transmission of test data and/or status monitoring result by communication module, described Communication module is arranged at the shell of electronic section or at the shell of mechanical part or the communication module and intelligent micro process Device integrated design is together；Or the communication module, memory are together with intelligent microprocessor integrated design.
24. a kind of high-precision gas density monitor based on edge calculations according to claim 23, it is characterised in that: The communication modes of the communication module are wire communication or wireless communication mode.
25. a kind of high-precision gas density monitor based on edge calculations according to claim 1, it is characterised in that: The pressure sensor, the temperature sensor are integrated.
26. a kind of high-precision gas density monitor based on edge calculations according to claim 1, it is characterised in that: The control of the intelligent microprocessor is by field control, and/or passes through the background monitoring terminal control.
27. a kind of high-precision gas density monitor based on edge calculations according to claim 1, it is characterised in that: The gas density relay further includes the display interface for human-computer interaction, the current data of real-time display, and/or support number According to input.
28. a kind of high-precision gas density monitor based on edge calculations according to claim 1, it is characterised in that: The edge calculations unit has the accurate density value of multiple and different time intervalsThe multiple different time intervals Accurate density valueTarget device or target platform are uploaded to by communication module.
29. a kind of high-precision gas density monitor system based on edge calculations, it is characterised in that: the system is wanted by right Seek a kind of 1 to 28 described in any item high-precision gas density monitor compositions based on edge calculations；Alternatively, the system packet Include a kind of described in any item high-precision gas density monitors based on edge calculations of claim 1 to 28.
CN201910830171.XA 2019-09-04 2019-09-04 A kind of high-precision gas density monitor and system based on edge calculations Pending CN110412226A (en)

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Cited By (3)

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CN111505493A (en) * 2020-04-29 2020-08-07 上海乐研电气有限公司 Multifunctional gas density monitor and monitoring system for monitoring temperature difference
CN113758653A (en) * 2021-09-09 2021-12-07 河南平高电气股份有限公司 Method for monitoring SF6 density relay in real time and pre-judging air leakage
CN114827279A (en) * 2022-03-25 2022-07-29 广州番禺电缆集团有限公司 Intelligent temperature measuring cable

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CN111505493A (en) * 2020-04-29 2020-08-07 上海乐研电气有限公司 Multifunctional gas density monitor and monitoring system for monitoring temperature difference
CN111505493B (en) * 2020-04-29 2022-06-24 上海乐研电气有限公司 Multifunctional gas density monitor and monitoring system for monitoring temperature difference
CN113758653A (en) * 2021-09-09 2021-12-07 河南平高电气股份有限公司 Method for monitoring SF6 density relay in real time and pre-judging air leakage
CN114827279A (en) * 2022-03-25 2022-07-29 广州番禺电缆集团有限公司 Intelligent temperature measuring cable
CN114827279B (en) * 2022-03-25 2023-06-16 广州番禺电缆集团有限公司 Intelligent temperature measurement cable

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