CN114509671B - GIS equipment contact state and load condition judgment method and system - Google Patents

GIS equipment contact state and load condition judgment method and system Download PDF

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Publication number
CN114509671B
CN114509671B CN202210413154.8A CN202210413154A CN114509671B CN 114509671 B CN114509671 B CN 114509671B CN 202210413154 A CN202210413154 A CN 202210413154A CN 114509671 B CN114509671 B CN 114509671B
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temperature
value
current
optical fiber
hidden danger
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CN114509671A (en
Inventor
魏建忠
刘浅
陈兴强
郭晓旭
李波
侯东光
鲍英豪
钱恺逸
曲衍宁
张枫茗
穆琦
晏寒
邵明
曲江浩
黄海浪
许永坚
李琪瑶
尚国旭
王爽
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China Railway Design Corp
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China Railway Design Corp
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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
    • G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
    • G01R31/3271—Testing of circuit interrupters, switches or circuit-breakers of high voltage or medium voltage devices
    • G01R31/3275—Fault detection or status indication
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
    • G01K11/32—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in transmittance, scattering or luminescence in optical fibres
    • 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
    • G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
    • G01R31/3271—Testing of circuit interrupters, switches or circuit-breakers of high voltage or medium voltage devices
    • G01R31/3272—Apparatus, systems or circuits therefor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
    • Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
    • Y04S40/126—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wireless data transmission

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Temperature Or Quantity Of Heat (AREA)

Abstract

The invention provides a method and a system for judging contact state and load condition of GIS equipment, which are used for carrying out real-time online temperature monitoring on a contact, a contact and a heating hidden trouble point in the GIS, wherein a temperature sensor is connected to the outside of the equipment through a switching component on the outer wall of the equipment in an extending way and is connected with an external temperature analyzer, a group of current monitoring devices are arranged at a wire outlet end of the GIS, the current monitoring devices output data to the temperature analyzer, and the analyzer dynamically judges the contact state and the load state of the contact of the GIS equipment by combining real-time temperature values and current values. The method and the system for judging the contact state and the load condition of the GIS equipment based on optical fiber temperature measurement are used for comparing the temperature value, the temperature difference value under the same current and the temperature rise rate with the standard temperature rise rate, and the temperature and the current are jointly judged by comparing the temperature value, the temperature difference value and the temperature rise rate with the standard temperature rise rate, so that the accuracy and the reliability of judgment are improved.

Description

GIS equipment contact state and load condition judgment method and system
Technical Field
The invention belongs to the field of intelligent monitoring of high-voltage power equipment, and particularly relates to a method and a system for judging contact states and load conditions of GIS (geographic information System) equipment.
Background
Gas insulated metal enclosed switchgear is also called GIS, is the closed circuit breaker who uses SF6 as insulating medium at circuit breaker and wiring copper bar position, can lead to the resistance increase because of the unsatisfactory contact of contact during the operation, and the current generates heat unusually when passing through. Through the actual temperature value of monitoring equipment internal contact when moving, can be comparatively effectual static contact condition and the ageing condition of judging GIS internal contact.
In order to realize the effectiveness and convenience of monitoring, in the prior art, a plurality of sensors are integrated on one device in a multi-characteristic online monitoring mode, and the judgment of the running state is completed by monitoring a plurality of characteristics during the running of the GIS. If the fiber grating or the infrared imaging sensor is used as a temperature sensor to measure the temperature of an internal joint of the GIS equipment, the ultrahigh frequency sensor is used for monitoring partial discharge of a non-metal material, the ultrasonic sensor is used for monitoring discharge sound waves inside the equipment, the transient ground voltage sensor is used for monitoring the ground voltage of an equipment shell, the ultraviolet imaging sensor is used for collecting the number of photons when the equipment discharges, and the radio frequency detector is used for monitoring the interference condition of radio frequency signals received by the equipment. And then, the running state of the equipment is independently judged through the data of a single sensor, and the judgment result is uploaded to a monitoring side by using wireless communication. Although multiple sensors are used for monitoring multiple representations simultaneously, the defect of insufficient intelligent data of a single sensor is effectively overcome, but the defect that each data is not correlated to comprehensively judge the actual running state of equipment according to multiple data is overcome, and misjudgment can be avoided due to single independent judgment condition.
And wherein the critical temperature sensor uses a non-contact infrared temperature sensor or a fiber grating temperature sensor. The infrared non-contact type has the advantages of simple and flexible operation, but poor stability, easy environmental interference and capability of only measuring the temperature of the outer contour. The service life of the fiber bragg grating is short in a high-temperature environment, interchangeability among channels is poor, and due to the fact that the sensor needs to be packaged for resisting cross interference (such as strain), the packaged sensor still has the problem of cross sensitivity in a thermal environment, and temperature is inaccurate.
In summary, the prior art has the following three disadvantages for monitoring the operation state of the GIS:
1. core data-the means of detection of temperature is flawed. The existing temperature measurement modes applied to the GIS have three types: the outer contour of the infrared non-contact measuring equipment, the shell of the thermal resistance measuring equipment or the measuring contact of the fiber grating temperature sensor. The infrared temperature measurement is inaccurate, is easy to be interfered by the environment, has low precision and slow response, has potential safety hazard of thermal resistance, is easy to be interfered by electromagnetic waves and has short service life, the fiber bragg grating has short service life in a high-temperature environment and poor interchangeability among channels, is greatly influenced by strain and has poor precision;
2. no correlation is established with the collected characterization data. The collected various data are not associated, and single independent data participate in judgment, so that misjudgment is inevitable;
3. most monitoring means only monitor the characteristic phenomenon, and do not trace and monitor the source causing the phenomenon.
Disclosure of Invention
In view of the above, the present invention aims to provide a method and a system for determining a contact state and a load condition of a GIS device, so as to solve the existing problems that the contact temperature detection device during the operation of the GIS has low detection precision, no correlation is established on collected characterization data, and the cause of the source of contact temperature abnormality is unclear.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
on one hand, the application provides a method for judging the contact state and the load condition of GIS equipment, which comprises the following steps:
s1, setting M hidden danger positions aiming at GIS equipment, and configuring a first comparison table of current and temperature and a second comparison table of temperature rise rates under different currents for each hidden danger position;
s2, setting a temperature alarm value T of the GIS equipment, an allowable actual temperature deviation value y under the same current and a time period p during temperature rise rate calculation;
s3, acquiring a temperature value and a current value of the GIS equipment at the same moment of the Xth hidden danger position, wherein X is more than 0 and less than or equal to M, and correspondingly storing the temperature value and the current value at the same moment;
s4, regularly obtaining the current temperature value at the Xth hidden danger position, comparing the current temperature with the temperature alarm value T, and judging whether to send out early warning according to the temperature value comparison result;
s5, obtaining the current temperature value and the current value of the Xth hidden danger position at regular time, calculating the current temperature value under the current value and the temperature difference value a under the same current in the comparison table I, comparing the temperature difference value a with the actual temperature deviation value y, and judging whether to send out an early warning according to the temperature difference value comparison result;
and S6, executing the steps S4 and S5, simultaneously calculating the actual temperature rise rate of the Xth hidden danger position in the time period P after accumulating the set time period P, carrying out rate comparison on the actual temperature rise rate and the temperature rise rate under the same current in the comparison table II, and judging whether to give out an early warning according to a rate comparison result.
Further, in step S1, the hidden danger positions include contacts, and hidden danger points of heating inside the GIS;
the comparison table I of the current and the temperature and the comparison table II of the temperature rising rate under different currents are measured by experiments.
Further, in step S3, a temperature value and a current value of the GIS device at the same time at the xth hidden danger position are obtained, where X is greater than 0 and less than or equal to M, and the temperature value and the current value at the same time are correspondingly stored, where the specific method is as follows:
the optical fiber temperature analyzer is correspondingly connected with the multiple optical fiber temperature sensors, after the optical fiber temperature analyzer emits an X-th excitation light, the excitation light irradiates a temperature sensing substance inside an optical fiber temperature sensor temperature probe corresponding to an X-th hidden danger position, the temperature sensing substance is excited and then returns an optical signal with a temperature signal, the optical fiber temperature analyzer reads a temperature value according to the optical signal, simultaneously obtains a current value corresponding to the X-th hidden danger position, and stores the temperature value and the current value in the storage unit.
The current value corresponding to the Xth hidden danger position is obtained through a current acquisition module corresponding to the inlet wire end of the Xth hidden danger position, and the current acquisition module is used for acquiring and reading current through a current transformer of the inlet wire end in the GIS equipment.
Further, in step S4, whether to send out an early warning is determined according to the temperature value comparison result, and the specific method is as follows: if the current temperature T is greater than or equal to the temperature alarm value T, a high-temperature alarm signal is immediately sent out, and if the current temperature T is less than the temperature alarm value T, the temperature is normal, and the high-temperature alarm signal is not sent out.
Further, in step S5, whether to send out an early warning is determined according to the temperature difference comparison result, and the specific method is as follows: if the temperature difference a is larger than or equal to the actual temperature deviation value y, it is indicated that the contact at the X-th hidden danger position is abnormal, and if the temperature difference a is smaller than the actual temperature deviation value y, it is indicated that the contact is normal.
Further, in step S6, whether to send out an early warning is determined according to the temperature rise rate comparison result, and the specific method is as follows: if the current temperature T is greater than or equal to the temperature alarm value T, the temperature rise rate is equal to or less than the standard temperature rise rate, the GIS equipment is prompted to be overloaded, and if the temperature rise rate is greater than the standard temperature rise rate, the X hidden danger position contact is prompted to be abnormal; if the current temperature T is smaller than the temperature alarm value T, the temperature rise rate is equal to or smaller than the standard temperature rise rate, the contact is prompted to be normal, and if the temperature rise rate is larger than the standard temperature rise rate, the contact abnormality of the Xth hidden danger position is prompted.
Further, in step S6, the actual temperature rise rate V in the time period P is calculated by the following formula:
V=(TK+P-TK)/P,
wherein the content of the first and second substances,
TKthe temperature value of the Nth temperature rise of the Xth hidden danger position at the moment of starting the accumulation time period p, K is the temperature rise time of the Nth temperature rise at the moment of starting the accumulation time period p, p is an artificially set time period, and the value of the time period p is less than or equal to the time period of each temperature rise;
TK+Pthe temperature value of the Nth temperature rise of the Xth hidden danger position at the moment of accumulating the time period P is obtained, and K + P is the temperature rise time of the Nth temperature rise at the moment of accumulating the time period P.
On the other hand, the application also provides a GIS equipment contact state and load condition judgment system applying the GIS equipment contact state and load condition judgment method, which comprises an optical fiber temperature analyzer, a temperature acquisition module and a current acquisition module for acquiring the potential position current value of the GIS equipment;
the optical fiber temperature analyzer comprises a storage unit, a data analysis unit connected with the storage unit, a temperature acquisition module interface connected with the temperature acquisition module, and a current signal input interface connected with the current acquisition module;
the optical fiber temperature analyzer is provided with a light source, an optical signal receiving unit and a temperature analyzing unit corresponding to the temperature acquisition module interface, wherein the light source is used for emitting exciting light, the light source and the optical signal receiving unit are both connected with the temperature analyzing unit, and the output end of the temperature analyzing unit is connected with the storage unit and is used for demodulating an optical signal into a digital temperature signal, namely a temperature value and then storing the temperature value in the storage unit;
the optical fiber temperature analyzer is also provided with a current data receiving unit corresponding to the current signal input interface, and the output end of the current data receiving unit is connected with the storage unit and used for transmitting a current value;
the optical fiber temperature analyzer is also provided with a user input unit connected with the storage unit, and the user input unit is used for inputting a current and temperature comparison table of hidden danger positions in the GIS equipment, a standard temperature rise rate of temperature rise relative to current rise, a temperature alarm value T set for the GIS equipment, an allowable actual temperature deviation value y under the same current and a time period p during temperature rise rate calculation;
the output end of the data analysis unit is provided with an alarm module for early warning;
the output end of the storage unit is also provided with a display end and an external communication unit for sending instructions, and the instructions comprise normal contacts, abnormal contacts and GIS equipment overload.
Furthermore, the temperature acquisition module comprises a plurality of optical fiber temperature sensors and a switching assembly, the optical fiber temperature sensors are all arranged in the air cabin of the GIS cabinet body, each optical fiber temperature sensor is arranged corresponding to one hidden danger position, and an optical connector of each optical fiber temperature sensor is connected with an optical interface of the switching assembly;
the switching assembly is fixedly connected to the outer side of a bulkhead of the GIS cabinet body, the bulkhead is provided with a mounting hole corresponding to the switching assembly, the output end of the switching assembly is provided with an extension optical cable, and the other end of the extension optical cable is connected with a temperature acquisition module interface of the optical fiber temperature analyzer for bidirectional optical signal transmission;
the optical fiber temperature sensor comprises a temperature sensing probe which is fixed at a hidden danger point inside the gas cabin and is connected with the optical connector through a quartz glass optical fiber.
Further, the switching assembly is fixedly connected with a bulkhead of the GIS cabinet body through a flange plate, the flange plate is welded with the bulkhead, a center shaft of an inner hole of the flange plate is on the same line with the circle center of the mounting hole, the flange plate and the switching assembly are locked through screws, and an O-shaped sealing ring for sealing is arranged between the flange plate and the switching assembly; the outside cover of switching subassembly is equipped with the protection casing, and the protection casing corresponds extension optical cable and sets up the installing port.
Compared with the prior art, the method and the system for judging the contact state and the load condition of the GIS equipment have the following beneficial effects:
(1) the method for judging the contact state and the load condition of the GIS equipment carries out temperature value comparison, temperature difference value comparison under the same current and temperature rise rate comparison with the standard temperature rise rate, and the temperature and the current are jointly judged by comparing the temperature and the current, so that the accuracy and the reliability of judgment are improved.
(2) The method for judging the contact state and the load condition of the GIS equipment records a comparison table of current and temperature of each hidden danger position in the GIS equipment and a standard temperature rise rate of temperature rise relative to current rise, acquires the temperature value and the current value of each hidden danger position, and can quickly troubleshoot the problem position when the temperature is abnormal.
(3) The temperature sensing probe is fixed at a hidden danger point in the gas cabin, is connected with the optical connector through the quartz glass optical fiber, is in contact induction, is accurate in test and high in signal transmission speed, and is convenient for the optical fiber temperature analyzer to make judgment in time.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic diagram of a method for determining a contact state and a load condition of a GIS device according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a data analysis unit according to an embodiment of the present invention;
FIG. 3 is a schematic view of an optical fiber temperature sensor mounting structure according to an embodiment of the present invention;
FIG. 4 is a schematic view of a bulkhead and adapter assembly configuration according to an embodiment of the invention;
FIG. 5 is a schematic view of an inner side structure of the adapter assembly according to the embodiment of the present invention;
fig. 6 is a schematic structural diagram of an optical fiber temperature sensor according to an embodiment of the present invention.
Description of reference numerals:
1-an optical fiber temperature sensor; 11-an optical connector; 12-silica glass fiber; 13-a temperature sensing probe; 2-a flange plate; 3-O type sealing ring; 4-a switching component; 41-protective cover; 42-an extension cable; 44-screws; 45-an optical interface; 5-fiber temperature analyzer; 6-a current collection module; 7-a GIS cabinet body; 71-gas chamber; 73-bulkhead.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate a number of the indicated technical features. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
As shown in fig. 1, the present application provides a method for determining a contact state and a load condition of a GIS device, which includes the following specific steps:
s1, setting M hidden danger positions for GIS equipment, configuring a first comparison table of current and temperature and a second comparison table of temperature rise rate under different currents for each hidden danger position, and storing the first comparison table and the second comparison table into a storage unit;
s2, setting a temperature alarm value T of the GIS equipment, an allowable actual temperature deviation value y under the same current, a time period p during temperature rise rate calculation, and storing the time period p into a storage unit;
s3, acquiring a temperature value and a current value of the GIS at the Xth hidden danger position at the same moment, wherein X is more than 0 and less than or equal to M, and correspondingly storing the temperature value and the current value at the same moment into a storage unit;
s4, obtaining the current temperature value at the Xth hidden danger position from the storage unit at regular time, comparing the current temperature with the temperature alarm value T, and judging whether to give out an early warning according to the comparison result of the temperature values;
s5, obtaining the current temperature value and the current value of the Xth hidden danger position from the storage unit at regular time, calculating the current temperature value under the current value and the temperature difference value a under the same current in the comparison table I, comparing the temperature difference value a with the actual temperature deviation value y, and judging whether to give out an early warning according to the temperature difference value comparison result;
and S6, executing the steps S4 and S5, simultaneously calculating the actual temperature rise rate of the Xth hidden danger position in the time period P after accumulating the set time period P, carrying out rate comparison on the actual temperature rise rate and the temperature rise rate under the same current in the comparison table II, and judging whether to give out an early warning according to a rate comparison result.
In step S1, the hidden danger positions include contacts, and hidden danger points of heating inside the GIS;
the comparison table I of the current and the temperature and the comparison table II of the temperature rising rate under different currents are measured by experiments.
In step S3, a temperature value and a current value of the GIS device at the xth hidden danger position at the same time are obtained, where X is greater than 0 and less than or equal to M, and the temperature value and the current value at the same time are correspondingly stored, and the specific method is as follows: the optical fiber temperature analyzer is correspondingly connected with the multiple optical fiber temperature sensors, after the optical fiber temperature analyzer emits an X-th excitation light, the excitation light irradiates a temperature sensing substance inside an optical fiber temperature sensor temperature probe corresponding to an X-th hidden danger position, the temperature sensing substance is excited and then returns an optical signal with a temperature signal, the optical fiber temperature analyzer reads a temperature value according to the optical signal, simultaneously obtains a current value corresponding to the X-th hidden danger position, and stores the temperature value and the current value in the storage unit.
The current value corresponding to the Xth hidden danger position is obtained through a current acquisition module 6 corresponding to the inlet wire end of the Xth hidden danger position, and the current acquisition module is used for acquiring and reading current through a current transformer of the inlet wire end in the GIS equipment.
As shown in fig. 1, in step S4, it is determined whether to issue an early warning according to the temperature value comparison result, and the specific method is as follows: if the current temperature T is greater than or equal to the temperature alarm value T, a high-temperature alarm signal is immediately sent out, and if the current temperature T is less than the temperature alarm value T, the temperature is normal, and the high-temperature alarm signal is not sent out.
As shown in fig. 1, in step S5, whether to issue an early warning is determined according to the temperature difference comparison result, which includes the following steps: if the temperature difference a is larger than or equal to the actual temperature deviation value y, it is indicated that the contact at the X-th hidden danger position is abnormal, and if the temperature difference a is smaller than the actual temperature deviation value y, it is indicated that the contact is normal.
As shown in fig. 1, in step S6, it is determined whether to issue an early warning according to the temperature rise rate comparison result, and the specific method is as follows: if the current temperature T is greater than or equal to the temperature alarm value T, the temperature rise rate is equal to or less than the standard temperature rise rate, the GIS equipment is prompted to be overloaded, and if the temperature rise rate is greater than the standard temperature rise rate, the contact abnormity of the Xth hidden danger position is prompted; if the current temperature T is smaller than the temperature alarm value T, the temperature rise rate is equal to or smaller than the standard temperature rise rate, the contact is prompted to be normal, and if the temperature rise rate is larger than the standard temperature rise rate, the contact abnormality of the Xth hidden danger position is prompted.
As shown in fig. 1, in step S6, the actual temperature rise rate V in the time period P is calculated by the formula:
V=(TK+P-TK)/P,
wherein, the first and the second end of the pipe are connected with each other,
TKthe temperature value of the Nth temperature rise of the Xth hidden danger position at the moment of starting the accumulation time period p, K is the temperature rise time of the Nth temperature rise at the moment of starting the accumulation time period p, p is an artificially set time period, and the value of the time period p is less than or equal to the time period of each temperature rise;
TK+Pthe temperature value of the Nth temperature rise of the Xth hidden danger position at the moment of accumulating the time period P is obtained, and K + P is the temperature rise time of the Nth temperature rise at the moment of accumulating the time period P.
As shown in fig. 2, the system for determining the contact state and the load condition of the GIS device, which applies the method for determining the contact state and the load condition of the GIS device, includes an optical fiber temperature analyzer, a temperature acquisition module, and a current acquisition module 6 for acquiring a current value of a position of a hidden danger of the GIS device;
the optical fiber temperature analyzer 5 comprises a storage unit, a data analysis unit connected with the storage unit, a temperature acquisition module interface connected with the temperature acquisition module, and a current signal input interface connected with the current acquisition module 6;
the optical fiber temperature analyzer 5 is provided with a light source, an optical signal receiving unit and a temperature analyzing unit corresponding to the temperature acquisition module interface, the light source is used for emitting exciting light, the light source and the optical signal receiving unit are both connected with the temperature analyzing unit, the output end of the temperature analyzing unit is connected with the storage unit and is used for demodulating the optical signal into a digital temperature signal, namely a temperature value, and then storing the digital temperature signal in the storage unit;
the optical fiber temperature analyzer 5 is also provided with a current data receiving unit corresponding to the current signal input interface, and the output end of the current data receiving unit is connected with the storage unit and used for transmitting a current value;
the optical fiber temperature analyzer 5 is further provided with a user input unit connected with the storage unit, and the user input unit is used for inputting a current and temperature comparison table of hidden danger positions in the GIS equipment, a standard temperature rise rate of temperature rise relative to current rise, a temperature alarm value T set for the GIS equipment, an allowable actual temperature deviation value y under the same current and a time period p during temperature rise rate calculation;
the output end of the data analysis unit is provided with an alarm module for early warning;
the output end of the storage unit is also provided with a display end and an external communication unit for sending instructions, and the instructions comprise normal contacts, abnormal contacts and GIS equipment overload.
The data analysis unit acquires the relevant data from the storage unit and performs steps S4-S6.
As shown in fig. 2 to 6, the temperature acquisition module includes a plurality of optical fiber temperature sensors 1 and a switching assembly, the plurality of optical fiber temperature sensors 1 are all disposed inside an air chamber 71 of the GIS cabinet 7, each optical fiber temperature sensor 1 is disposed corresponding to a hidden danger position, and an optical connector of the optical fiber temperature sensor 1 is connected with an optical interface 45 of the switching assembly;
the switching component 4 is fixedly connected to the outer side of a bulkhead 73 of the GIS cabinet body, the bulkhead 73 is provided with a mounting hole corresponding to the switching component, the output end of the switching component is provided with an extension optical cable 42, and the other end of the extension optical cable 42 is connected with a temperature acquisition module interface of the optical fiber temperature analyzer 5 for bidirectional optical signal transmission;
the optical fiber temperature sensor 1 comprises a temperature sensing probe 13, the temperature sensing probe is fixed at a hidden danger point inside the gas cabin 71, and the temperature sensing probe 13 is connected with the optical connector 11 through a quartz glass optical fiber 12.
The optical fiber temperature sensor 1 can adopt a temperature sensor based on gallium arsenide absorption principle or fluorescence light emitting principle, and the conversion component adopts but is not limited to an optical through adapter.
As shown in fig. 3 to fig. 6, the adapter module 4 is fixedly connected with a bulkhead 73 of the GIS cabinet through a flange 2, the flange is welded with the bulkhead 73, a central axis of an inner hole of the flange 2 is aligned with a circle center of the mounting hole, the flange 2 and the adapter module are locked by a screw 44, and an O-shaped sealing ring 3 for sealing is arranged between the flange 2 and the adapter module; the adapter module 4 is externally covered with a protective cover 41, and the protective cover 41 is provided with a mounting opening corresponding to the extension optical cable 42.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (9)

  1. The GIS equipment contact state and load condition judging method is characterized by comprising the following specific steps of:
    s1, setting M hidden danger positions aiming at GIS equipment, and configuring a first comparison table of current and temperature and a second comparison table of temperature rise rates under different currents for each hidden danger position;
    s2, setting a temperature alarm value T of the GIS equipment, an allowable actual temperature deviation value y under the same current and a time period p during temperature rise rate calculation;
    s3, acquiring a temperature value and a current value of the GIS equipment at the same moment of the Xth hidden danger position, wherein X is more than 0 and less than or equal to M, and correspondingly storing the temperature value and the current value at the same moment;
    s4, regularly obtaining the current temperature value at the Xth hidden danger position, comparing the current temperature with the temperature alarm value T, and judging whether to send out an early warning according to the temperature value comparison result;
    s5, obtaining the current temperature value and the current value of the Xth hidden danger position at regular time, calculating the current temperature value under the current value and the temperature difference value a under the same current in the comparison table I, comparing the temperature difference value a with the actual temperature deviation value y, and judging whether to send out an early warning according to the temperature difference value comparison result;
    s6, executing steps S4 and S5, calculating the actual temperature rise rate of the Xth hidden danger position in the time period P after accumulating the time period P, comparing the actual temperature rise rate with the temperature rise rate under the same current in the comparison table II, judging whether to give out an early warning according to the rate comparison result,
    if the current temperature T is greater than or equal to the temperature alarm value T, the temperature rise rate is equal to or less than the standard temperature rise rate, the GIS equipment is prompted to be overloaded, and if the temperature rise rate is greater than the standard temperature rise rate, the contact abnormity of the Xth hidden danger position is prompted; if the current temperature T is smaller than the temperature alarm value T, the temperature rise rate is equal to or smaller than the standard temperature rise rate, the contact is prompted to be normal, and if the temperature rise rate is larger than the standard temperature rise rate, the contact at the X-th hidden danger position is prompted to be abnormal.
  2. 2. The method for judging the contact state and the load condition of the GIS device according to claim 1, characterized in that: in step S1, the hidden danger positions comprise contact points, contact points and heating hidden danger points inside the GIS;
    the comparison table I of the current and the temperature and the comparison table II of the temperature rising rate under different currents are measured by experiments.
  3. 3. The method for judging the contact state and the load condition of the GIS device according to claim 1, characterized in that: in step S3, a temperature value and a current value of the GIS device at the xth hidden danger position at the same time are obtained, where X is greater than 0 and less than or equal to M, and the temperature value and the current value at the same time are correspondingly stored, and the specific method is as follows:
    the optical fiber temperature analyzer is correspondingly connected with the multiple optical fiber temperature sensors, after the optical fiber temperature analyzer emits an X-th excitation light, the excitation light irradiates a temperature sensing substance inside an optical fiber temperature sensor temperature probe corresponding to an X-th hidden danger position, the temperature sensing substance is excited and then returns an optical signal with a temperature signal, the optical fiber temperature analyzer reads a temperature value according to the optical signal, simultaneously obtains a current value corresponding to the X-th hidden danger position, and correspondingly stores the temperature value and the current value.
  4. 4. The method for judging the contact state and the load condition of the GIS device according to claim 1, characterized in that: in step S4, whether an early warning is to be issued is determined according to the temperature value comparison result, and the specific method is as follows: if the current temperature T is greater than or equal to the temperature alarm value T, a high-temperature alarm signal is immediately sent out, and if the current temperature T is less than the temperature alarm value T, the temperature is normal, and the high-temperature alarm signal is not sent out.
  5. 5. The method for judging the contact state and the load condition of the GIS device according to claim 1, characterized in that: in step S5, whether to send out an early warning is determined according to the temperature difference comparison result, and the specific method is as follows: if the temperature difference a is larger than or equal to the actual temperature deviation value y, it is indicated that the contact at the X-th hidden danger position is abnormal, and if the temperature difference a is smaller than the actual temperature deviation value y, it is indicated that the contact is normal.
  6. 6. The method for judging the contact state and the load condition of the GIS device according to claim 1, characterized in that: in step S6, the actual temperature rise rate V within the time period P is calculated as:
    V＝(TK+P-TK)/P,
    wherein the content of the first and second substances,
    TKthe temperature value of the Nth temperature rise of the Xth hidden danger position at the moment of starting the accumulation time period p, K is the temperature rise time of the Nth temperature rise at the moment of starting the accumulation time period p, p is an artificially set time period, and the value of the time period p is less than or equal to the time period of each temperature rise;
    TK+Pthe temperature value of the Nth temperature rise of the Xth hidden danger position at the moment of accumulating the time period P, and K + P is the temperature value of the Nth temperature rise at the moment of accumulating the time period PTime of temperature rise.
  7. 7. The GIS equipment contact state and load condition judgment system based on optical fiber temperature measurement by applying the GIS equipment contact state and load condition judgment method of any one of claims 1-6, characterized in that: the device comprises an optical fiber temperature analyzer, a temperature acquisition module and a current acquisition module (6) for acquiring the potential position current value of the GIS equipment;
    the optical fiber temperature analyzer (5) comprises a storage unit, a data analysis unit connected with the storage unit, a temperature acquisition module interface connected with the temperature acquisition module, and a current signal input interface connected with the current acquisition module (6);
    the optical fiber temperature analyzer (5) is provided with a light source, an optical signal receiving unit and a temperature analyzing unit corresponding to the temperature acquisition module interface, wherein the light source is used for emitting exciting light, the light source and the optical signal receiving unit are both connected with the temperature analyzing unit, and the output end of the temperature analyzing unit is connected with the storage unit and is used for demodulating the optical signal into a digital temperature signal, namely a temperature value and then storing the temperature value in the storage unit;
    the optical fiber temperature analyzer (5) is also provided with a current data receiving unit corresponding to the current signal input interface, and the output end of the current data receiving unit is connected with the storage unit and used for transmitting a current value;
    the optical fiber temperature analyzer (5) is also provided with a user input unit connected with the storage unit, and the user input unit is used for inputting a comparison table of current and temperature of hidden danger positions in the GIS equipment, a standard temperature rise rate of temperature rise relative to current rise, a temperature alarm value T set for the GIS equipment, an actual temperature deviation value y allowed under the same current and a time period p during temperature rise rate calculation;
    the output end of the data analysis unit is provided with an alarm module for early warning;
    the output end of the storage unit is also provided with a display end and an external communication unit for sending instructions, and the instructions comprise normal contacts, abnormal contacts and GIS equipment overload.
  8. 8. The GIS equipment contact state and load condition judgment system based on optical fiber temperature measurement according to claim 7, characterized in that: the temperature acquisition module comprises a plurality of optical fiber temperature sensors (1) and a switching assembly, the optical fiber temperature sensors (1) are all arranged in an air chamber (71) of the GIS cabinet body (7), each optical fiber temperature sensor (1) is arranged corresponding to one hidden danger position, and an optical connector of each optical fiber temperature sensor (1) is connected with an optical interface (45) of the switching assembly;
    the switching assembly (4) is fixedly connected to the outer side of a bulkhead (73) of the GIS cabinet body, a mounting hole is formed in the bulkhead (73) corresponding to the switching assembly, an extension optical cable (42) is arranged at the output end of the switching assembly, and the other end of the extension optical cable (42) is connected with a temperature acquisition module interface of the optical fiber temperature analyzer (5) and used for transmitting optical signals in a two-way mode;
    the optical fiber temperature sensor (1) comprises a temperature sensing probe (13), the temperature sensing probe is fixed at a hidden danger point inside the gas cabin (71), and the temperature sensing probe (13) is connected with the optical connector (11) through a quartz glass optical fiber (12).
  9. 9. The GIS equipment contact state and load condition judgment system based on optical fiber temperature measurement according to claim 8, characterized in that: the switching component (4) is fixedly connected with a bulkhead (73) of the GIS cabinet body through a flange plate (2), the flange plate is welded with the bulkhead (73), a center shaft of an inner hole of the flange plate (2) is in a line with the circle center of the mounting hole, the flange plate (2) and the switching component are locked through a screw (44), and an O-shaped sealing ring (3) for sealing is arranged between the flange plate (2) and the switching component; the adapter assembly (4) is externally covered with a protective cover (41), and the protective cover (41) is provided with a mounting opening corresponding to the extension optical cable (42).
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