WO2022237988A1 - Système et procédé de surveillance de l'état d'un appareillage de commutation - Google Patents

Système et procédé de surveillance de l'état d'un appareillage de commutation Download PDF

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Publication number
WO2022237988A1
WO2022237988A1 PCT/EP2021/062848 EP2021062848W WO2022237988A1 WO 2022237988 A1 WO2022237988 A1 WO 2022237988A1 EP 2021062848 W EP2021062848 W EP 2021062848W WO 2022237988 A1 WO2022237988 A1 WO 2022237988A1
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WO
WIPO (PCT)
Prior art keywords
optical
sensor
switchgear
characteristic parameter
wavelength range
Prior art date
Application number
PCT/EP2021/062848
Other languages
English (en)
Inventor
Cuicui SU
Nan Li
Delun MENG
Lei Wang
Michael GATZSCHE
Falk BLUMENROTH
Tiansong CHEN
Yang Wang
Original Assignee
Hitachi Energy Switzerland Ag
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Energy Switzerland Ag filed Critical Hitachi Energy Switzerland Ag
Priority to PCT/EP2021/062848 priority Critical patent/WO2022237988A1/fr
Publication of WO2022237988A1 publication Critical patent/WO2022237988A1/fr

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J1/00—Photometry, e.g. photographic exposure meter
    • G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
    • G01J1/429—Photometry, e.g. photographic exposure meter using electric radiation detectors applied to measurement of ultraviolet light
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J1/00—Photometry, e.g. photographic exposure meter
    • G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
    • G01J1/4228—Photometry, e.g. photographic exposure meter using electric radiation detectors arrangements with two or more detectors, e.g. for sensitivity compensation
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
    • G01J5/0096—Radiation pyrometry, e.g. infrared or optical thermometry for measuring wires, electrical contacts or electronic systems
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
    • G01J5/02—Constructional details
    • G01J5/08—Optical arrangements
    • G01J5/0859—Sighting arrangements, e.g. cameras
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
    • G01J5/02—Constructional details
    • G01J5/08—Optical arrangements
    • G01J5/0875—Windows; Arrangements for fastening thereof
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
    • G01J2005/0077—Imaging

Definitions

  • the disclosure relates to a system and method for monitoring a condition of a switchgear.
  • Switchgears are generally utilized as protection equipment for electrical power systems.
  • the healthy operation of a switchgear is essential to the power supply quality and reliability of an electrical power system.
  • Sensors are usually applied to a switchgear to sense a parameter, such as electric current, voltage, and temperature.
  • Type and arrangement of the sensors may affect measuring accuracy and safety, which in turn affects monitoring reliability and safety for the switchgear.
  • a sensor is embedded in a component such as a contact of the switchgear.
  • a complex compensation calculation may be required to eliminate gas disturbance so as to obtain an accurate measuring result.
  • the switchgear comprises a housing on which an inspection window is fitted.
  • the system comprises an optical sensing unit arranged to be proximate to the inspection window and outside the housing, the optical sensing unit comprising at least one optical sensor configured to detect optical signals from an object inside the housing through the inspection window and output at least one characteristic parameter of the object based on the detected optical signals; and a controlling unit communicatively connected with the optical sensing unit to receive the characteristic parameter, the controlling unit being configured to determine a condition of the switchgear based on the at least one characteristic parameter, wherein the at least one optical sensor is configured to detect the optical signals within a working wavelength range which corresponds to the transmission wavelength range of the optical material forming the inspection window.
  • the switchgear comprises a housing on which an inspection window is fitted.
  • the method comprises providing an optical sensing unit including at least one optical sensor outside the housing and proximate to the observing window, the at least one optical sensor having a working wavelength range which corresponds to the transmission wavelength range of the optical material forming the inspection window (e.g., the at least one optical sensor having a working wavelength range which is consistent with the transmission wavelength range of the optical material forming the inspection window); detecting optical signals from an object inside the housing through the observation window and outputting at least one characteristic parameter of the object based on the detected signals; and determining a condition of the switchgear based on the at least one characteristic parameter.
  • the key factors that affect condition monitoring results are taken into consideration in monitoring systems and methods and thus high monitoring stability and accuracy can be obtained.
  • Other advantages of the disclosure would be explained in the following description.
  • Figure l is a schematic block diagram of a system for monitoring a condition of a switchgear according to a possible embodiment of the disclosure.
  • Figure 2 is a schematic block diagram for illustrating the principles of the disclosure.
  • Figure 3 illustrates curves of main factors which have influence on precision of optical measurement.
  • Figures 4A-4D depict possible embodiments of the optical sensing unit of the system illustrated in Figure 1.
  • FIG. 5 is a schematic flowchart of a method for monitoring a condition of a switchgear according to a possible embodiment of the disclosure.
  • Figure 1 is a schematic block diagram of a system 100 for monitoring a condition of a switchgear 200 according to a possible embodiment of the disclosure.
  • the switchgear 200 is applicable to electric power systems.
  • the switchgear 200 may be used in a voltage range of 1-2000 kV.
  • the switchgear 200 is a high-voltage switchgear or middle- voltage switchgear.
  • the switchgear 200 is a gas-insulated high-voltage switchgear.
  • the switchgear 200 comprises a housing 210 defining an internal volume 220.
  • Dielectric gas media 230 e.g., dielectric insulation media in gaseous states
  • one or more electrical parts e.g., an electrical part 240 shown in Figure 1 are disposed in the internal volume 220.
  • Dielectric insulation media in gaseous states are applied to insulate the electrical parts in the switchgear.
  • the dielectric insulation gas does not allow the passage of electrical current from the electrical parts to spaces of the switchgear.
  • the dielectric insulation gas is sulfur hexafluoride (SFe), which exhibits excellent insulation and electric arc extinguishing capabilities.
  • the dielectric insulation gas may comprise an organofluorine compound, in particular selected from a group consisting of: a fluoroether, an oxirane, a fluoroamine, a fluoroketone, a fluoroolefm, a fluoronitrile, and mixtures and/or decomposition products thereof; and the organofluorine compound being in a mixture with a background gas, in particular selected from a group consisting of: air, dry air, technically dried air, N2 and O2, technical air, CO2, N2, N2O, O2, and mixtures thereof.
  • An inspection window 250 is disposed (fitted) on the housing 210.
  • the inspection window 250 is configured to keep the housing 210 in an enclosed sealing state.
  • Optical material forming the inspection window 250 has a transmittance such that the inspection window 250 is substantially transparent to optical signals from a detected object (e.g., the electrical part 240) in the working wavelength range of the the sensing unit 110.
  • the optical material forming the inspection window has a transmittance to the optical signals in working wavelength range such that the transmission loss energy is lower than the emitted energy of the optical material itself within the working wavelength range.
  • the optical material forming the inspection window 250 may be borosilicate glass or soda-lime glass.
  • the structure of the inspection window 250 and the material from which it is constructed have a function of providing hot and cold resistance as well as mechanical strength such that the window 250 will not be broken by increased chamber pressure (e.g., the pressure in the internal volume 220) or by temperature variations (e.g., internal temperature or environment temperature increases or decreases sharply).
  • the monitoring system 100 is arranged outside the switchgear 200 for monitoring a condition of the switchgear 200.
  • the monitoring system 100 mainly comprises an optical sensing unit 110 and a controlling unit 120.
  • the optical sensing unit 110 is arranged to be proximate to the inspection window 250 and outside the housing 210.
  • the optical sensing unit 110 includes at least one optical sensor.
  • the at least one optical sensor is configured to detect (receive) optical signals (lights) from an object inside the housing 210 through the inspection window 250 and output at least one characteristic parameter of the object based on the detected optical signals.
  • the detected optical lights may include optical lights emitted from the object and/or optical lights reflected from the object.
  • the at least one optical sensor may be selected from a plurality of optical sensors based on sensor’s working wavelength range (i.e., sensor’s response wavelength range) such that the sensor’s working wavelength range substantially matches the transmission wavelength range of the optical material forming the inspection window 250.
  • the controlling unit 120 is arranged outside the switchgear 200 and communicatively connected with the optical sensing unit 110.
  • the controlling unit 120 may be connected with the optical sensing unit 110 via wired links and/or wireless communication links.
  • the controlling unit 120 can be connected by means of a communication interface via a fieldbus to a superordinate system 300 of the switchgear 200.
  • the superordinate system 300 is a control and implementation system.
  • the communication can be based on the standardized switchgear protocol IEC61850.
  • data can also be transmitted via an Ethernet or via a PowerLine network or a radio transmission path. If the communication between the controlling unit and the superordinate system takes place via the PowerLine network, the supply line can be used not only to feed the controlling unit with current and voltage, but also for data transmission.
  • the controlling unit 120 may comprise one or more modules which may be implemented by means of software, hardware or combinations of software and hardware. For example, the same functions can be implemented via software or via hardware.
  • the controlling unit 120 is configured to determine a condition of the switchgear 200 based on the characteristic parameter received from the sensing unit 110.
  • controlling unit 120 is further configured to generate an alarm signal when the value of the characteristic parameter exceeds a maximum predetermined threshold value or falls below a minimum predetermined threshold value.
  • the controlling unit 120 is configured to judge whether the object temperature is within a predetermined tolerance range of the object temperature. If the sensed object temperature exceeds the predetermined tolerance range (e.g., exceeds a maximum threshold value of the range or falls below a minimum threshold value of the range), the controlling unit 120 generates an alarm signal, so that an alarm unit (not shown), which is communicatively connected with the controlling unit 120, emits an acoustic and/or optical alarm in response to receiving the alarm signal from the controlling unit 120.
  • the predetermined tolerance range e.g., exceeds a maximum threshold value of the range or falls below a minimum threshold value of the range
  • the controlling unit is configured to determine a position of the contact based on the heat map and/or image. In this case, the position of the contact can be monitored. It thus can be judged whether the contact is moved to an accurate position.
  • the controlling unit is configured to determine an arcing fault condition based on the received electrical signal.
  • the system 100 further comprises a storage unit 130 communicatively connected with the controlling unit 120.
  • the storage unit 130 is configured for storing information including parameters, curves and spectra. The information may be used for an intelligent selection of optimal use for the monitoring system 100. The principles and examples of the intelligent selection will be described below.
  • Figure 2 illustrates main factors which have influence on precision of optical measurement of the monitoring system 100.
  • Atmospheric gas disturbance is not listed since normal optical sensing unit will work around such disturbance range by solutions like optical filters.
  • the working wavelength range of the optical sensor does not match the transmission wavelength range of the optical material forming the inspection window, a part of or almost all of the optical signals from the detected object cannot be allowed to pass through the inspection window and be received by the optical sensing unit.
  • the measuring wavelength range corresponds to the wavelength range with weak surface emissivity, the measuring results will not be accurate. For example, if the measuring wavelength range is overlapped with the emitted wavelength range with a weak surface emissivity, it is difficult to create a concrete positive correlation between the received energy and object temperature.
  • the measuring wavelength range corresponds to the wavelength range with strong gas absorption
  • the measuring results will not be accurate.
  • the measuring wavelength range is overlapped with the wavelength range with strong gas absorption, it is difficult to create a positive correlation between the received energy and object temperature.
  • the working wavelength range of the optical sensor the wavelength range of high surface emissivity and the transmission wavelength range of the optical material forming the inspection window should be substantially matched.
  • the three wavelength ranges are substantially overlapped. In an example, the three wavelength ranges coincide.
  • the wavelength range of strong gas absorption should be avoided.
  • the matched wavelength range and the wavelength range of strong gas absorption are completely different.
  • the matched wavelength range should be selected such that gas disturbance in the matched wavelength will not have influence on the measurement accuracy.
  • the matched wavelength range is selected such that an energy error (e.g., energy loss or additional energy which is wrongfully added to the detected energy) caused by the gas disturbance (interference) in the matched wavelength range is less than a predetermined ratio of the total energy from the object.
  • the predetermined ratio is 2%.
  • Figure 3 illustrates curves of main factors which have influence on precision of optical measurement.
  • the horizontal axis represents wavelength.
  • the solid line represents the sensor’s response curve.
  • the vertical axis correspondingly represents normalized intensity of photo sensitivity of the sensor. This curve shows the working wavelength range of the sensor.
  • the dashed line represents the surface emissivity curve.
  • the vertical axis correspondingly represents normalized intensity of surface emissivity of the detected object. This curve shows the intensity of surface emissivity over wavelength.
  • the dash-dotted line represents the optic transmittance curve.
  • the vertical axis correspondingly represents normalized intensity of transmittance of the optical material forming the inspection window. This curve shows the intensity of window transmittance over wavelength.
  • the dotted line represents the gas absorbance curve.
  • the vertical axis correspondingly represents normalized intensity of gas absorbance caused by the gas filled in the housing. This curve shows the intensity of gas absorbance over wavelength.
  • the long-dash line represents blackbody radiation curve at 298K.
  • the vertical axis correspondingly represents normalized intensity of blackbody radiation at 298K. This curve shows the intensity of blackbody radiation over wavelength at 298K.
  • the dash-dot-dot line represents blackbody radiation curve at 398K.
  • the vertical axis correspondingly represents normalized intensity of blackbody radiation at 398K. This curve shows the intensity of blackbody radiation over wavelength at 398K.
  • an optical sensor with working wavelength range of 1-2 5 pm can be selected because the optical material forming the inspection window is transparent to optical signals and surface emissivity is relatively strong in this wavelength range, and the wavelength ranges with strong gas absorbance are completely different from the selected wavelength range. In other words, the wavelength ranges with strong gas absorbance are avoided by the selected wavelength range.
  • information including various curves, parameters and spectra indicating characteristics of sensors, window material and dielectric gas media are stored in the form of a table (e.g., a lookup table) in the storage unit 130.
  • the controlling unit 120 is configured to determine an optimal use for the monitoring system based on information stored in the table. For example, an applicable sensor is automatically selected from a number of sensors by means of matching curves, parameters and spectra associated with the above described factors in the current scenario in the table.
  • the curves, parameters and spectra includes those corresponding to working wavelength ranges of candidate sensors, gas absorption of the filled gas, transmittance of the window material and surface emissivity of the detected object.
  • a machine learning model is trained using the information in the table and a trained machine learning model is created.
  • the information associated with the above described factors in the current scenario is inputted to the trained machine learning model.
  • the inputted information is processed (e.g., analyze, filed and calibrated) in the model.
  • an applicable sensor and/or a matched wavelength range in the current scenario are outputted as model output.
  • Figures 4A-4D depict embodiments of the optical sensing unit 110 of the system
  • the optical sensing unit 110 comprises an infrared sensor 111 (IR sensor 111).
  • the infrared sensor 111 is configured to detect infrared energy (infrared signal) which is emitted from an object inside the housing 210 and pass through the inspection window 250 and output a temperature or heat map of the object as the characteristic parameter based on detected infrared energy.
  • the infrared sensor 111 is selected based on its working wavelength range such that the optical material of the inspection widow 250 permits the infrared signal to pass therethrough and be received by the infrared sensor 111.
  • the infrared sensor 111 may detect infrared energy emitted from a surface of the detected object and output a temperature of the object.
  • the object may be a shield, conductor or contact in the housing of the switchgear 200.
  • the temperature of the object may be in the range of -30°C to 125°C.
  • the surface of the detected object may be an insulating paint surface or a metallic surface.
  • the surface of the detected object may be painted to improve its emissivity.
  • the surface of the detected object is coated with an insulating layer or grease.
  • the infrared sensor 111 may be a short wavelength infrared sensor (SWIR) for detecting optical signals in a wavelength range of 1-2 5 pm.
  • SWIR short wavelength infrared sensor
  • a temperature of an object (which is at temperature above the absolute zero) may be calculated based on the following formula (radiation law by Plank), wherein “Mi s ” is the spectral specific radiation of the object into the half space, “T” is the temperature of the object (which may be calculated based on the blackbody radiation curve such as the long-dash line and the dash-dot-dot line shown in Figure 3), “l” is the wavelength of detected IR signals, “Ci” and “C2” are constant parameters:
  • the infrared sensor 111 can measure temperature of an object by means of detecting infrared energy emitted by the object (black body) which is at temperatures above absolute zero.
  • the optical sensing unit 110 further comprises an adjusting module A.
  • the adjusting module A may be integrated with or otherwise formed integral to the IR sensor 111 so as to form as a whole.
  • the adjusting module A may also be independent of the IR sensor 111 and communicatively connected with the IR sensor 111.
  • the adjusting module A is configured to adjust the parameter and operation of the sensor such that the monitoring system can operate at high-efficiency (e.g., max-efficiency).
  • the adjusting module A is configured to adjust sensor’s responding wavelength range such that the sensor onlv resnonses to the wavelengths without gas absorption.
  • the optical sensor 111 of the sensing unit 110 is implemented as a smart sensor having intelligence of automatically or semi-automatically calibrating the performance of the sensor itself.
  • the adjusting module A can adjust the background compensation temperature or surface emissivity dynamically.
  • the optical sensing unit 110 comprises the infrared sensor 111 as described with reference to Figure 3 A and a visible light sensor 112.
  • the optical sensing unit 110 may also comprise the adjusting module A communicatively connected with the sensors 111 and 112.
  • Various features described above with reference to the infrared sensor 111 and the adjusting module A are also applicable in this example, and thus the description to them is omitted.
  • the visible light sensor 112 is configured to detect a visible light signal which is emitted from an object inside the housing 210 and pass through the inspection window 250 and output images (including video) of the object as the characteristic parameter based on detected visible light signal.
  • the infrared sensor and the visible light sensor may be selected from a plurality of sensors based on their working wavelength ranges such that the optical material of the inspection window 250 permits both of the infrared signal and the visible light signal to pass therethrough and be received by the infrared sensor and the visible light sensor respectively.
  • the two sensors i.e., the infrared sensor 111 and a visible light sensor 112
  • the two sensors may be selected and arranged according to the position and size of the inspection window 250 such that both sensors can be arranged to be proximate to the inspection window and have advantageous viewpoints for detecting the infrared signal and the visible light signal respectively.
  • the optical sensing unit 110 comprises an integrated sensor 113 integrated with an infrared signal sensing module 113 A and a visible light signal sensing module 113B for detecting an infrared signal and a visible light signal in their corresponding working wavelength ranges respectively.
  • the optical sensing unit 110 may also comprise the adjusting module A communicatively connected with the modules 113 A and 113B.
  • Various features described above with reference to the adjusting module A are also applicable in this example, and thus the description to them is omitted.
  • the example of Figure 3C is different from the example of Figure 3B in that the optical sensing unit 110 comprises only one sensor which is integrated with two types of sensing modules, i.e., the infrared signal sensing module 113A and the visible light signal sensing module 113B, while the optical sensing unit 110 in Figure 3B comprises two independent sensors, i.e., the infrared sensor 111 and the visible light sensor 112.
  • the infrared signal sensing module 113 A and the visible light signal sensing module 113B are selected based on their corresponding working wavelength ranges such that the optical material of the inspection window 250 permits both of the infrared signal and the visible light signal to pass therethrough and be received by the infrared signal sensing module 113 A and the visible light signal sensing module 113B respectively.
  • the working principle and function of the infrared signal sensing module 113 A is similar to the infrared sensor 111.
  • the working principle and function of the visible light signal sensing module 113B is similar to the visible light sensor 112.
  • Various features described above with reference to the sensors 111 and 112 are also applicable in this example, and thus the description to them is omitted.
  • the optical sensing unit 110 comprises the infrared sensor 111 and the visible light sensor 112 as described with reference to Figure 3B and an ultraviolet sensor 114 (UV sensor).
  • the optical sensing unit 110 may also comprise the adjusting module A communicatively connected with the sensors 111, 112 and 114.
  • Various features described above with reference to the sensors 111 and 112 and the adjusting module A are also applicable in this example, and thus the description to them is omitted.
  • the UV sensor 114 is configured to detect an ultraviolet light signal induced by an arc fault, which may be associated with at least one electrical part in the housing, and generate an electrical signal as the characteristic parameter based on the detected UV signal.
  • UV sensors measure the power or intensity of ultraviolet (UV) radiation. This form of electromagnetic radiation has shorter wavelengths than visible radiation, but is still longer than x-rays.
  • the output signals of UV sensors are electrical signals that may be routed directly to an electrical meter for monitoring and recording.
  • the electrical signals generated by UV sensors may also be sent to an analog-to-digital converter (ADC), and then to the controlling unit with software for generating graphs and reports, which indicate the arc fault condition.
  • ADC analog-to-digital converter
  • the infrared sensor, the visible light sensor and the UV sensor may be selected from a plurality of sensors based on their working wavelength ranges such that the optical material of the inspection window 250 permits the infrared signal, the visible light signal and the UV light signal to pass therethrough and be received by the infrared sensor, the visible light sensor and the UV sensor respectively.
  • the three sensors i.e., the infrared sensor, the visible light sensor and the UV sensor
  • the three sensors may be selected and arranged according to the position and size of the inspection window 250 such that these sensors can be arranged to be proximate to the inspection window and have advantageous viewpoints for detecting the infrared signal, the visible light signal and the UV signal respectively.
  • optical sensing unit 110 may also comprise components for fixing and holding the sensors, and the disclosure does not limit to this.
  • Figures 3A-3D show exemplary embodiment of the optical sensing unit 110.
  • the optical sensing unit 110 may comprise various other suitable optical sensors according to specific application scenarios.
  • an additional sensor may be arranged inside or outside the housing of the switchgear 200 and communicatively connected with the controlling unit 120.
  • various measurements including an optical measurement and at least one other kind of measurement are carried out for monitoring the condition of the switchgear 200.
  • the various measurements can be carried out simultaneously or one after another.
  • the additional sensor generates additional characteristic parameter and sends the additional characteristic parameter to the controlling unit 120.
  • the additional characteristic parameter comprises at least one of temperature, vibration, electric current, voltage, moisture content, gas density, gas pressure, sound pressure, total dissolved solid content and chemical species.
  • the controlling unit 120 may calculate a healthy condition of the switchgear based on the at least one characteristic parameter from the at least one optical sensor and the additional characteristic parameter from the additional sensor
  • condition monitoring is implemented by means of multi-sensor information fusion so that a cross-checked judgment can be made based on the information of two or more sensors and thus the complementarity and redundancy is realized.
  • This solution is advantageous, because correlating and verifying information from the multiple sensors can improve accuracy and reliability of monitoring results.
  • the monitoring solution for a switchgear can be implemented without switchgear redesign or complex calculation.
  • the monitoring solution can be applied to a switchgear which may has been installed and operated at a customer site for several year as well as a new switchgear.
  • the new switchgear may be equipped with the monitoring system as a switchgear assembly.
  • the characteristic parameter of the object will be measured directly.
  • temperature of the object inside the housing will be measured directly instead of measuring housing temperature with thermal network calculation.
  • the gas disturbance in the working wavelength range of the sensing unit is almost eliminated or decreased to a minimum level.
  • a multi-functional monitoring system is implemented with only one viewpoint window (inspection window) instead of a set of different viewpoint windows, which may cause safety/airtightness problems and a high cost of the multi- functional monitoring system.
  • FIG. 5 is a schematic flowchart of a method 500 for monitoring a condition of a switchgear according to a possible embodiment of the disclosure.
  • Various features described above with reference to the monitoring system 100 are also applicable in the method, and thus the description to them is omitted.
  • an optical sensing unit including at least one optical sensor is provided outside the housing and proximate to the observing window.
  • the at least one optical sensor has a working wavelength range which corresponds to the transmission wavelength range of an optical material forming the inspection window.
  • the at least one optical sensor detects optical signals emitted from an object inside the housing through the observation window and outputs at least one characteristic parameter of the object based on the detected signals.
  • a condition of the switchgear is determined based on the at least one characteristic parameter.
  • step 540 in the case that the value of the characteristic parameter exceeds a maximum predetermined threshold value or falls below a minimum predetermined threshold value, an alarm signal is generated.
  • software should be considered broadly to represent instructions, instruction sets, code, code segments, program code, programs, subroutines, software modules, applications, software applications, software packages, routines, subroutines, objects, running threads, processes, functions, and the like.
  • Software can reside on computer readable medium.
  • Computer readable medium may include, for example, a memory, which may be, for example, a magnetic storage device (e.g., a hard disk, a floppy disk, a magnetic strip), an optical disk, a smart card, a flash memory device, a random access memory (RAM), a read only memory (ROM), a programmable ROM (PROM), an erasable PROM (EPROM), an electrically erasable PROM (EEPROM), a register, or a removable disk.
  • a memory is shown as being separate from the processor in various aspects presented in this disclosure, a memory may also be internal to the processor (e.g., a cache or a register).

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  • Spectroscopy & Molecular Physics (AREA)
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Abstract

L'invention concerne un système et un procédé de surveillance de l'état d'un appareillage de commutation. L'appareillage de commutation (200) comprend un boîtier (210) sur lequel est montée une fenêtre d'inspection (250). Le système (100) comprend une unité de détection optique (110) agencée pour se trouver à proximité de la fenêtre d'inspection et à l'extérieur du boîtier, l'unité de détection optique comprenant au moins un capteur optique configuré pour détecter des signaux optiques provenant d'un objet (240) à l'intérieur du boîtier à travers la fenêtre d'inspection et délivrer en sortie au moins un paramètre caractéristique de l'objet sur la base des signaux optiques détectés ; et une unité de commande (120) reliée en communication avec l'unité de détection optique pour recevoir le paramètre caractéristique, l'unité de commande étant configurée pour déterminer une condition de l'appareillage de commutation sur la base dudit au moins un paramètre caractéristique. Ledit au moins un capteur optique est configuré pour détecter les signaux optiques dans une plage de longueur d'onde de travail qui correspond à la plage de longueur d'onde de transmission du matériau optique formant la fenêtre d'inspection.
PCT/EP2021/062848 2021-05-14 2021-05-14 Système et procédé de surveillance de l'état d'un appareillage de commutation WO2022237988A1 (fr)

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PCT/EP2021/062848 WO2022237988A1 (fr) 2021-05-14 2021-05-14 Système et procédé de surveillance de l'état d'un appareillage de commutation

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014105993A1 (fr) * 2012-12-26 2014-07-03 Flir Systems, Inc. Systèmes et procédés de dispositif de surveillance infrarouge d'armoire électrique
KR20150061414A (ko) * 2013-11-27 2015-06-04 엘에스산전 주식회사 가스절연개폐기용 부분방전 복합 센서 조립체
EP3598090A1 (fr) * 2018-07-16 2020-01-22 ABB Schweiz AG Appareil de détection de température d'un objet d'intérêt
EP3786598A1 (fr) * 2019-08-30 2021-03-03 ABB Schweiz AG Système de surveillance d'un appareillage de commutation

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014105993A1 (fr) * 2012-12-26 2014-07-03 Flir Systems, Inc. Systèmes et procédés de dispositif de surveillance infrarouge d'armoire électrique
KR20150061414A (ko) * 2013-11-27 2015-06-04 엘에스산전 주식회사 가스절연개폐기용 부분방전 복합 센서 조립체
EP3598090A1 (fr) * 2018-07-16 2020-01-22 ABB Schweiz AG Appareil de détection de température d'un objet d'intérêt
EP3786598A1 (fr) * 2019-08-30 2021-03-03 ABB Schweiz AG Système de surveillance d'un appareillage de commutation

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