WO2016209024A1 - Procédé de surveillance de charge en temps réel et de diagnostic de la détérioration d'huile d'isolation, et transformateur intelligent mettant en œuvre ce procédé - Google Patents

Procédé de surveillance de charge en temps réel et de diagnostic de la détérioration d'huile d'isolation, et transformateur intelligent mettant en œuvre ce procédé Download PDF

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Publication number
WO2016209024A1
WO2016209024A1 PCT/KR2016/006763 KR2016006763W WO2016209024A1 WO 2016209024 A1 WO2016209024 A1 WO 2016209024A1 KR 2016006763 W KR2016006763 W KR 2016006763W WO 2016209024 A1 WO2016209024 A1 WO 2016209024A1
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WIPO (PCT)
Prior art keywords
real
insulating oil
load monitoring
section
temperature
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PCT/KR2016/006763
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English (en)
Korean (ko)
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장태수
윤병주
조용선
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주식회사 비츠로씨앤씨
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Publication of WO2016209024A1 publication Critical patent/WO2016209024A1/fr

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • 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
    • G01N33/26—Oils; Viscous liquids; Paints; Inks
    • G01N33/28—Oils, i.e. hydrocarbon liquids
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/08—Cooling; Ventilating
    • H01F27/10—Liquid cooling
    • H01F27/12—Oil cooling

Definitions

  • the present invention relates to a real-time load monitoring and insulation oil degradation diagnosis method and a smart transformer using the same, in detail, by using the real-time load monitoring results and insulation oil degradation diagnosis results at the same time by generating an alarm for the inspection time of the insulation oil
  • the present invention relates to a real-time load monitoring and insulation oil degradation diagnosis method that can increase the accuracy and efficiently use the inspection manpower resources, and a smart transformer using the same.
  • a constant monitoring device In order to secure the reliability of the transformer and to supply the power stably, a constant monitoring device has been developed for measuring the abnormal symptoms that are the beginning of the accident at all times in the operating state of the transformer.
  • a transformer In the case of a transformer, it consists of a transverse coil consisting of a primary coil and a secondary coil, and a housing for accommodating the mutual induction of the transcoil and a housing accommodating the mutually coupled transcoil and the magnetic field core.
  • an insulating insulating coolant hereinafter referred to as 'insulating oil'
  • 'insulating oil' an insulating insulating coolant
  • insulation oil deterioration due to thermal deterioration due to high temperature operation, thermal deterioration due to external short circuit, mechanical damage and discharge deterioration due to partial discharge, combustible gas is generated in the insulating oil of the transformer over time, which is called insulation oil deterioration. If the insulating oil of the transformer deteriorates, a check for replacement is to be carried out. The timing of the inspection is closely related to the amount of flammable gas and the temperature of the insulating oil.
  • Korean Patent No. 10-1090143 discloses a prior art document relating to a transformer having an insulation oil degradation measurement sensor.
  • the present invention generates an alarm for the inspection time of the insulating oil by using the real-time load monitoring result and the insulation oil degradation diagnosis result at the same time to increase the accuracy of the prediction of the inspection time and to use the inspection manpower resources efficiently, the real-time load monitoring and insulation oil degradation diagnosis method And to provide a smart transformer using the same.
  • the present invention provides a real-time load monitoring that solves the problem of the implementation by having a database for storing the temperature characteristics according to the type of the flammable gas and the criteria for determining where the detection amount of the flammable gas falls among the safety section, attention section and abnormal section And to provide a smart transformer using the insulation oil degradation diagnostic method.
  • Smart transformer using a real-time load monitoring and insulation oil degradation diagnostic method for achieving the above object is a smart transformer using a real-time load monitoring and insulation oil degradation diagnostic method, of the smart transformer
  • An insulation oil degradation diagnosis sensor configured to measure and output a detected amount of a combustible gas contained in the insulation oil and a temperature of the insulation oil
  • a load monitoring sensor measuring and outputting three-phase current / voltage from the load of the smart transformer
  • a database unit which stores a temperature characteristic according to a type of combustible gas and a criterion for determining where the detected amount of flammable gas corresponds to a safety section, a caution section or an abnormal section
  • a determination unit for inputting a detection amount of flammable gas measured by the insulation oil degradation diagnosis sensor, and determining whether the detection amount of the flammable gas corresponds to a safety section, a warning section or an abnormal section according to a reference stored in the database unit;
  • the combustible gas for which the insulation oil degradation diagnostic sensor measures the detection amount is hydrogen (H 2 ), acetylene (C 2 H 2 ), ethylene (C 2 H 4 ), methane (CH 4 ), ethane (C 2 H 6 ) , Propane (C 3 H 8 ) It may be any one selected from.
  • the alarm unit may generate an alarm for checking the insulating oil based on a value obtained by averaging the temperature of the insulating oil and the three-phase current / voltage for a predetermined period when the determination of the determination unit is a caution period.
  • the smart transformer using the real-time load monitoring and insulation oil degradation diagnostic method is selected from among the Ethernet, mobile communication network, Wi-Fi, Bluetooth and radio wave recognition of the data on the three-phase current / voltage, the detection amount of the flammable gas and the insulation oil temperature It may further include a communication unit for transmitting to an external terminal using any one communication means.
  • the communication unit may have a function of converting data on the three-phase current / voltage, the detection amount of the flammable gas and the insulating oil temperature into a data format compatible with any one selected from Modbus, DNP, and IEC 61850.
  • Real-time load monitoring and insulation oil degradation diagnosis method for achieving the above object in the real-time load monitoring and insulation oil degradation diagnostic method for a smart transformer, a) the detected amount of the flammable gas Preparing a database of temperature characteristics according to types of combustible gases and criteria for determining which of the safety section, the attention section and the abnormal section; b) measuring the amount of the flammable gas contained in the insulating oil of the smart transformer and the temperature of the insulating oil; c) measuring three-phase current / voltage at the load of the smart transformer; d) determining whether the detected amount of the flammable gas corresponds to a safety section, a warning section or an abnormal section according to a reference stored in the database unit; e) If the detection amount of flammable gas corresponds to an abnormal section, generate an alarm for checking the insulating oil; if the detection amount of flammable gas corresponds to an attention interval, the temperature of the insulating oil, the three-phase current / voltage and the
  • the combustible gas of step b) is hydrogen (H 2 ), acetylene (C 2 H 2 ), ethylene (C 2 H 4 ), methane (CH 4 ), ethane (C 2 H 6 ), propane (C 3 H 8 ) may be any one selected from.
  • the detection amount of the flammable gas in the step e) corresponds to the caution interval, it is possible to generate an alarm for the insulating oil check based on the average of the temperature of the insulating oil and the three-phase current / voltage in a predetermined period. .
  • the real-time load monitoring and insulation oil degradation diagnosis method is followed by step e) f) the data of the three-phase current / voltage, the detection amount of the flammable gas and the insulation oil temperature Ethernet, mobile communication network, Wi-Fi, Bluetooth and radio waves
  • the method may further include transmitting to an external terminal using any one communication means selected from among the recognition.
  • the step f) converts the data on the three-phase current / voltage, the detection amount of the flammable gas and the insulating oil temperature into a data format suitable for any one data communication standard selected from Modbus, DNP and IEC 61850 Can be sent to the terminal.
  • the present invention can solve the problem of the implementation by having a database for storing the temperature characteristics according to the type of the combustible gas and the criteria for determining where the detection amount of the flammable gas falls among the safety section, attention section and abnormal section.
  • FIG. 1 is a conceptual diagram of a power grid to which a smart transformer using a real-time load monitoring and insulation oil degradation diagnostic method according to an embodiment of the present invention.
  • FIG. 2 is a block diagram illustrating a function of a smart transformer using a real-time load monitoring and insulation oil degradation diagnostic method according to an embodiment of the present invention.
  • FIG. 3 is a table illustrating criteria for determining which of a safety section, a caution section, and an abnormal section correspond to the detected amount of flammable gas.
  • FIG. 5 is a flowchart illustrating a real-time load monitoring and insulation oil degradation diagnosis method according to an embodiment of the present invention.
  • Applicant is concerned about how to determine whether an alarm is generated when the amount of flammable gas measured by the insulation oil deterioration diagnostic sensor is in the caution period, but if the current and voltage of the transformer load are high, the amount of flammable gas is near. It was found that this abnormal section was reached and deepened to complete the present invention.
  • the power grid to which the smart transformer using the real-time load monitoring and insulation oil degradation diagnosis method according to an embodiment of the present invention may include a smart transformer 100, a communication network 200, a terminal 300 and a monitoring center 400. .
  • the smart transformer 100 has an automation function by ICT (Information and Communications Technologies) added to a conventional transformer, and has a function of processing information on current and voltage of a load, temperature and gas composition of an insulating oil, and the like. It can perform remote condition monitoring diagnosis or remote meter reading function.
  • ICT Information and Communications Technologies
  • the communication network 200 is a set of resources constituting a communication path between terminal devices and may be any physical layer including a wired communication network and a wireless communication network, and a dedicated communication network using a protocol such as IEC 61850, DNP, Modbus, or the like. It may be a commercial communication network.
  • the terminal 300 is a device capable of transmitting and receiving information using the communication network 200, and may be a laptop, a smartphone, a personal computer, or the like.
  • the monitoring center 400 is installed in a substation, a management station of a smart grid network, etc., and is connected to the communication network 200 as a device or a set of devices for performing the state monitoring diagnosis and load monitoring of the smart transformer 100, IEC 61850, DNP,
  • the protocols defined in the standards for substation automation, such as Modbus, can be used.
  • Smart transformer 100 is a terminal 300 by using the communication network 200, such as Ethernet, mobile communication network, Wi-Fi, Bluetooth, radio wave recognition data of the three-phase current / voltage of the load, the detection amount of the flammable gas and the insulating oil temperature Can be transmitted directly or indirectly, and the monitoring center 400 uses a protocol according to the standards such as IEC 61850, DNP, Modbus, etc., and is connected to the communication network 200 using an inverter, etc. It is possible to collect data on the voltage / voltage, the detection amount of the flammable gas and the insulating oil temperature from the transformer (100).
  • the communication network 200 such as Ethernet, mobile communication network, Wi-Fi, Bluetooth, radio wave recognition data of the three-phase current / voltage of the load, the detection amount of the flammable gas and the insulating oil temperature Can be transmitted directly or indirectly, and the monitoring center 400 uses a protocol according to the standards such as IEC 61850, DNP, Modbus, etc., and is connected to the communication network 200 using an inverter,
  • Smart transformer using a real-time load monitoring and insulation oil degradation diagnostic method according to an embodiment of the present invention is the insulation oil degradation diagnostic sensor 110, load monitoring sensor 120, database unit 140, determination unit 130, alarm unit 150, the communication unit 160 may be included.
  • the insulation oil degradation diagnosis sensor 110 may measure and output the detected amount of the combustible gas contained in the insulation oil of the smart transformer 100 and the temperature of the insulation oil.
  • the combustible gases generated from the insulating oil of the transformer hydrogen (H 2 ), acetylene (C 2 H 2 ), ethylene (C 2 H 4 ), methane (CH 4 ), ethane (C 2 H 6 ), propane ( C 3 H 8 ) and so on, the insulating oil degradation diagnostic sensor 110 should be able to measure them.
  • the load monitoring sensor 120 may measure and output three-phase current / voltage from the load of the smart transformer.
  • the database unit 140 may store a criterion for determining where the measured amount of flammable gas corresponds to a safety section, a caution section, and an abnormal section and temperature characteristics according to the type of the flammable gas.
  • the safety section, caution section and abnormal section will be explained. If the detected amount of flammable gas corresponds to the normal section, there is no need to check the insulating oil. It may mean that there is a need. In the middle section, the caution section (Caution) does not determine the necessity of the inspection only by the detection amount of flammable gas. You can get off. In addition, since the degree of influence of the surrounding environment (for example, the temperature of the insulating oil) may vary depending on the type of flammable gas, information on this is necessary.
  • the temperature characteristic requires T abnormal , which is a temperature at which an abnormal section with respect to temperature starts, t move , which is a time required to start an insulating oil check, and a detailed description and application thereof will be described later. Therefore, since the temperature characteristic according to the type of combustible gas and the criterion for determining where the detected amount of flammable gas corresponds to a safety section, a caution section and an abnormal section are required for each combustible gas, it is necessary to make a database.
  • the determination unit 130 receives a detection amount of the flammable gas measured by the insulation oil degradation diagnostic sensor, and determines whether the detection amount of the flammable gas corresponds to a safety section, a warning section, or an abnormal section according to a reference stored in the database unit 140. You can print The determination unit must be electrically connected to access the database unit 140.
  • the temperature of the insulating oil, the three-phase current / voltage and the determination of the determination unit is input to the alarm unit 150, and if the determination of the determination unit 130 is an abnormal section, generates an alarm for the inspection of the insulating oil, the determination unit 130 If the judgment is a safety zone, no alarm is generated for the insulation oil check. If the judgment of the determination unit 130 is a caution section, the alarm may be generated based on the temperature of the insulating oil, the three-phase current / voltage, and the temperature characteristics according to the type of the combustible gas stored in the database unit 140. Describe it.
  • I is the effective value of the three-phase current measured at the load
  • r is the resistance of the field core and transcoil of the transformer
  • C is the heat capacity of the entire insulating oil
  • T abnormal is the temperature at which the abnormal section starts
  • T measure is the measured insulating oil.
  • the temperature, t move is the time required to start the oil check.
  • I 2 r may be replaced with V 2 / r, where V is the effective value of the voltage measured at the load.
  • the alarm unit 150 uses a value obtained by averaging the temperature of the insulating oil and the three-phase current / voltage for a predetermined period, which is the current or voltage.
  • the predetermined time is preferably 1 minute or more because the residual noise is very large in the case of 1 minute or less.
  • t move is the time it takes to start the inspection by sending manpower to the inspection site for oil, taking into consideration the distance between the atmospheric manpower and the voltage transformer, the time it takes to prepare for the replacement of oil, and the risks of temperature depending on the type of oil. Can be determined.
  • the left side of Equation 1 is the amount of heat required for the temperature of the transformer insulating oil to reach the abnormal section, and the right side is the amount of heat generated from the transformer. Therefore, the transformer can be evaluated as dangerous when the right side is larger than the left side.
  • T abnormal and t move may be values stored in the database unit 140 as values determined according to the type of combustible gas.
  • Equation 1 is summarized as Equation 2 with respect to the current value measured at the load.
  • Equation 2 using the T abnormal , t move , C and r stored in the database unit 140, it can be seen that the generation criteria of the alarm according to the current measured at the load is presented.
  • the communication unit 160 inputs data and alarms regarding three-phase current / voltage, flammable gas detection amount, and insulating oil temperature through one of a communication network or a communication channel selected from Ethernet, mobile communication network, Wi-Fi, Bluetooth, and radio wave recognition. Data can be transmitted to an external terminal.
  • the communication unit 160 may further have a function of converting the input data into a format satisfying a protocol defined in a standard for substation automation such as IEC 61850, DNP, Modbus, etc., for data exchange with the monitoring center 400. Can be.
  • FIG. 3 is a table illustrating criteria for determining which of a safety section, a caution section, and an abnormal section correspond to the detected amount of flammable gas.
  • hydrogen (H 2 ) acetylene (C 2 H 2 ), ethylene (C 2 H 4 ), methane (CH 4 ), ethane (C 2 H 6 ), propane (C 3 H 8 ), and the like.
  • the detection amount of the same flammable gas it is possible to know whether it corresponds to a safety section, a warning section, or an abnormal section. In practical example, if 500 ppm of hydrogen (H 2 ) is measured, it corresponds to Caution.
  • FIG. 4 is a table showing the probability of transformer accident according to the measured temperature of the insulating oil. Depending on the type of combustible gas, the probability that a transformer malfunctions will vary because of temperature. Referring to FIG. 4, it can be seen that hydrogen (H 2 ) has a lower risk of malfunction when the temperature is higher than that of ethylene (C 2 H 4 ). Because these characteristics can be applied to move the t Equation (1), in the case of hydrogen (H 2), the t move relative to ethylene (C 2 H 4) can be set large.
  • the real-time load monitoring and insulation oil degradation diagnostic method according to an embodiment of the present invention a) the criterion and the flammable gas to determine whether the detected amount of flammable gas corresponds to the safety section, attention section and abnormal section Preparing a database for temperature characteristics according to the type (S10), b) measuring the amount of the flammable gas contained in the insulating oil of the smart transformer and the temperature of the insulating oil (S20), c) the smart transformer Measuring a three-phase current / voltage at a load of (S30), d) determining whether the detected amount of the flammable gas corresponds to a safety section, a warning section or an abnormal section according to a reference stored in the database unit ( S40) and e) if the detection amount of the flammable gas corresponds to the abnormal section, generates an alarm for the insulating oil check, the detection amount of the insulating oil check, the detection amount of the insulating oil check, the detection amount of the insulating oil check, the detection amount of

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  • Engineering & Computer Science (AREA)
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  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Power Engineering (AREA)
  • General Physics & Mathematics (AREA)
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Abstract

La présente invention concerne un procédé en temps réel de surveillance de charge et de diagnostic de la détérioration d'huile d'isolation, ainsi qu'un transformateur intelligent mettant en œuvre ce procédé, et elle concerne plus particulièrement un procédé de surveillance de charge en temps réel et de diagnostic de la détérioration d'huile d'isolation, qui peut générer une alarme pour un point de temps d'inspection d'huile d'isolation, simultanément à l'aide d'un résultat de surveillance de charge en temps réel et d'un résultat de diagnostic de détérioration d'huile d'isolation, de manière à augmenter la précision de prédiction du point de temps d'inspection et à utiliser efficacement des ressources humaines d'inspection, ainsi qu'un transformateur intelligent mettant en œuvre ce procédé.
PCT/KR2016/006763 2015-06-25 2016-06-24 Procédé de surveillance de charge en temps réel et de diagnostic de la détérioration d'huile d'isolation, et transformateur intelligent mettant en œuvre ce procédé WO2016209024A1 (fr)

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KR1020150090281A KR101565554B1 (ko) 2015-06-25 2015-06-25 실시간 부하감시 및 절연유 열화진단 방법과 이를 이용한 스마트 변압기
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CN111579757A (zh) * 2020-05-13 2020-08-25 云南电网有限责任公司电力科学研究院 绝缘油中溶解气体在线监测设备光电转换模块的冷却装置
CN114034844B (zh) * 2021-11-09 2023-06-02 广东电网有限责任公司 一种绝缘油的溯源检测方法、介质、电子设备及装置

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