CN111487512A - VFTO and partial discharge monitoring system and method for GIS transformer substation - Google Patents
VFTO and partial discharge monitoring system and method for GIS transformer substation Download PDFInfo
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- CN111487512A CN111487512A CN202010499050.4A CN202010499050A CN111487512A CN 111487512 A CN111487512 A CN 111487512A CN 202010499050 A CN202010499050 A CN 202010499050A CN 111487512 A CN111487512 A CN 111487512A
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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
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1254—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of gas-insulated power appliances or vacuum gaps
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0046—Arrangements for measuring currents or voltages or for indicating presence or sign thereof characterised by a specific application or detail not covered by any other subgroup of G01R19/00
- G01R19/0053—Noise discrimination; Analog sampling; Measuring transients
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0084—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring voltage only
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Abstract
The application relates to the technical field of power grid equipment monitoring, in particular to a VFTO and partial discharge monitoring system and method for a GIS substation. Towards VFTO and partial discharge monitoring system of GIS transformer substation includes: the system comprises at least one VFTO and partial discharge integrated monitoring sensor, a control terminal and a controller, wherein the VFTO and partial discharge integrated monitoring sensor is arranged at a partial discharge device to be monitored and is configured to be used for judging the VFTO and partial discharge of the system, uploading and storing VFTO information and discharge information to the control terminal; the isolation switch is configured between different VFTO and partial discharge fusion monitoring sensors; and the control terminal is configured to control the VFTO and the partial discharge fusion monitoring sensor and the isolating switch to operate through communication.
Description
Technical Field
The application relates to the technical field of power grid equipment monitoring, in particular to a VFTO and partial discharge monitoring system and method for a GIS substation.
Background
SF6 Gas-insulated metal-enclosed switchgear (GIS) has developed rapidly since its emergence in the middle of the last 60 th century. Compared with the traditional air insulation switch equipment, the GIS concentrates all the equipment such as a bus, an isolating switch, a circuit breaker, a lightning arrester, a mutual inductor and the like in a closed grounding metal shell, has the advantages of small occupied area, small influence by natural environment, safe and reliable operation, long overhaul and maintenance period and the like, and is widely applied to domestic and foreign electric power systems.
In China, GIS is widely applied to 110kV, 220kV and 500kV main line substations. In a 1000kV extra-high voltage alternating current test demonstration project, a GIS is also adopted in a Jinsoutheast transformer substation. In foreign countries, GIS have also been applied to power systems of the 500kV, 765kV, 800kV class.
However, the GIS in operation are also exposed to various kinds of Overvoltage, especially Very Fast Transient Overvoltage (VFTO). When an isolating switch in the GIS is used for switching on and off an unloaded bus, because the contact movement speed is low (about a few cm/s), the contact gap can be subjected to multiple pre-breakdown and re-ignition under the power frequency voltage, the high-frequency oscillation caused by discharge forms a rapid transient process, and the step voltage wave generated in the process is transmitted back and forth in the GIS and is refracted and reflected to form the VFTO with high-frequency oscillation. VFTO has the characteristics of high amplitude, steep wave front, high oscillation frequency and the like, and seriously threatens the safe operation of GIS equipment. The current means of studying VFTO are mainly divided into simulation calculation and field measurement. Since the VFTO rise time is extremely short (only a few ns), and is superimposed on the power frequency voltage and affected by residual charge (whose equivalent frequency is close to dc), the measurement system is required to have a very high upper cut-off frequency and a sufficiently low lower cut-off frequency.
The partial discharge is the discharge which occurs in the partial range of the insulation of the power equipment under the action of a strong enough electric field, and is the main reason of the insulation degradation of the power equipment. During the manufacturing and operation process, air bubbles, impurities and other substances can also appear in the medium, which results in high field intensity areas in or on the insulating medium, once the field intensity of the areas is high enough to cause local breakdown of the areas, partial area discharge can occur, and other areas can still maintain good insulating performance, so that the partial discharge is formed. It may occur in solid insulation voids, liquid insulation bubbles, or between insulating layers of different dielectric properties. It may also occur in liquid or solid insulation if the electric field strength is higher than a certain value that the medium has. Partial discharge is a main cause of insulation degradation, and is also an important sign and manifestation form of insulation degradation, is closely related to degradation of an insulation material and a breakdown process of an insulator, and can effectively reflect latent defects and failures of insulation inside equipment. Therefore, the measurement of the partial discharge strength and the change rule of the electrical equipment under different voltages can indicate the insulation state of the equipment, and is also an important basis for estimating the insulation electrical aging speed.
Disclosure of Invention
The application provides a VFTO and partial discharge monitoring system and method for a GIS transformer substation, and the VFTO and partial discharge monitoring system for the GIS transformer substation, which comprises at least one VFTO and partial discharge fusion monitoring sensor, an isolating switch and a control terminal, can be used for monitoring VFTO and partial discharge conditions in GIS equipment.
The embodiment of the application is realized as follows:
the embodiment of the application provides a VFTO and partial discharge monitoring system towards GIS transformer substation in the first aspect, includes:
the system comprises at least one VFTO and partial discharge integrated monitoring sensor, a control terminal and a controller, wherein the VFTO and partial discharge integrated monitoring sensor is arranged at a partial discharge device to be monitored and is configured to be used for judging the VFTO and partial discharge of the system, uploading and storing VFTO information and discharge information to the control terminal;
the isolation switch is configured between different VFTO and partial discharge fusion monitoring sensors;
and the control terminal is configured to control the VFTO and the partial discharge fusion monitoring sensor and the isolating switch to operate through communication.
A second aspect of the embodiments of the present application provides a VFTO and partial discharge monitoring method for a GIS substation, where the method includes:
the control terminal starts the induction wireless power taking module, after the power is on, the control terminal starts the VFTO and partial discharge fusion monitoring sensor to carry out VFTO monitoring and system partial discharge monitoring, and the control terminal controls the isolating switch to carry out on-off operation;
the VFTO and partial discharge fusion monitoring sensor uploads the VFTO and partial discharge information obtained through measurement to the control terminal;
the control terminal stores and analyzes the received information, stops the work of the VFTO and partial discharge fusion monitoring sensor, and can observe and process the measured VFTO and partial discharge information of the GIS equipment at the control terminal.
The technical scheme provided by the application comprises the following beneficial effects: through constructing the GIS-substation-oriented VFTO and partial discharge monitoring system comprising at least one VFTO and partial discharge fusion monitoring sensor, the isolating switch and the control terminal can effectively realize the VFTO and partial discharge early warning of GIS equipment, so that the maintenance has pertinence and effectiveness, the maintenance efficiency is improved, and the safe and reliable operation of the equipment is ensured.
Drawings
In order to more clearly explain the technical solution of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained according to the drawings without any creative effort.
Fig. 1 shows a schematic diagram of a VFTO and partial discharge monitoring system 100 for a GIS substation according to an embodiment of the present application;
FIG. 2 illustrates a schematic diagram of an exemplary computing device 200 in an embodiment of the present application;
fig. 3 shows a schematic structural diagram of a VFTO and partial discharge monitoring system for a GIS substation according to an embodiment of the present application;
FIG. 4 is a schematic diagram of a VFTO and partial discharge fusion monitoring sensor according to an embodiment of the present disclosure;
FIG. 5 is a schematic diagram of a structure of a disconnecting switch of the embodiment of the application;
fig. 6 shows a flowchart of a VFTO and partial discharge monitoring method for a GIS substation according to an embodiment of the present application.
Detailed Description
Certain exemplary embodiments will now be described to provide an overall understanding of the principles of the structure, function, manufacture, and use of the devices and methods disclosed herein. One or more examples of these embodiments are illustrated in the accompanying drawings. Those of ordinary skill in the art will understand that the devices and methods specifically described herein and illustrated in the accompanying drawings are non-limiting exemplary embodiments and that the scope of the various embodiments of the present invention is defined solely by the claims. Features illustrated or described in connection with one exemplary embodiment may be combined with features of other embodiments. Such modifications and variations are intended to be included within the scope of the present invention.
Reference throughout this specification to "embodiments," "some embodiments," "one embodiment," or "an embodiment," or the like, means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, appearances of the phrases "in various embodiments," "in some embodiments," "in at least one other embodiment," or "in an embodiment" or the like throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. Thus, the particular features, structures, or characteristics shown or described in connection with one embodiment may be combined, in whole or in part, with the features, structures, or characteristics of one or more other embodiments, without limitation. Such modifications and variations are intended to be included within the scope of the present invention.
Flow charts are used herein to illustrate operations performed by systems according to some embodiments of the present application. It should be expressly understood that the operations of the flow diagrams may be performed out of order, with precision. Rather, these operations may be performed in the reverse order or simultaneously. Also, one or more other operations may be added to the flowchart. One or more operations may be removed from the flowchart.
Fig. 1 is a schematic diagram of a GIS substation oriented VFTO and partial discharge monitoring system 100 according to some embodiments of the present application. The VFTO and partial discharge monitoring system 100 for the GIS transformer substation is a platform for monitoring the VFTO and partial discharge of GIS equipment of the transformer substation. The VFTO and partial discharge monitoring system 100 for a GIS substation may include a server 110, at least one storage device 120, at least one network 130, one or more VFTO and partial discharge fused monitoring sensors 150-1, 150-2. The server 110 may include a processing engine 112.
In some embodiments, the server 110 may be a single server or a group of servers. The server farm can be centralized or distributed (e.g., server 110 can be a distributed system). In some embodiments, the server 110 may be local or remote. For example, server 110 may access data stored in storage device 120 via network 130. Server 110 may be directly connected to storage device 120 to access the stored data. In some embodiments, the server 110 may be implemented on a cloud platform. The cloud platform may include a private cloud, a public cloud, a hybrid cloud, a community cloud, a distributed cloud, multiple clouds, the like, or any combination of the above. In some embodiments, server 110 may be implemented on a computing device as illustrated in FIG. 2 herein, including one or more components of computing device 200.
In some embodiments, the server 110 may include a processing engine 112. for example, the processing engine 112 may be based on VFTO and information collected by the partial discharge fusion monitoring sensor 150 and sent to the storage device 120 over the network 130 for updating data stored therein. in some embodiments, the processing engine 112 may include one or more processors the processing engine 112 may include one or more hardware processors, such as a Central Processing Unit (CPU), an Application Specific Integrated Circuit (ASIC), an application specific instruction set processor (ASIP), a Graphics Processing Unit (GPU), a physical arithmetic processing unit (PPU), a Digital Signal Processor (DSP), a Field Programmable Gate Array (FPGA), a programmable logic device (P L D), a controller, a microcontroller unit, a Reduced Instruction Set Computer (RISC), a microprocessor, and the like, or any combination of the above examples.
In some embodiments, the storage device 120 may be connected with a network 130 to enable communication with one or more components in the GIS substation-oriented VFTO and partial discharge monitoring system 100. One or more components of the GIS substation oriented VFTO and partial discharge monitoring system 100 may access data or instructions stored in storage device 120 via network 130. In some embodiments, the storage device 120 may be directly connected or in communication with one or more components of the GIS substation-oriented VFTO and partial discharge monitoring system 100. In some embodiments, storage device 120 may be part of server 110.
The network 130 may facilitate the exchange of information and/or data. In some embodiments, one or more components of the GIS substation oriented VFTO and partial discharge monitoring system 100 may send information and/or data to other components of the GIS substation oriented VFTO and partial discharge monitoring system 100 over the network 130. For example, the server 110 may obtain/obtain requests from the VFTO and partial discharge convergence monitoring sensor 150 via the network 130. In some embodiments, the network 130 may be any one of a wired network or a wireless network, or a combination thereof. In some embodiments, the network 130 may include one or more network access points. For example, the network 130 may include wired or wireless network access points, such as base stations and/or Internet switching points 130-1, 130-2, and so forth. Through the access point, one or more components of the GIS substation oriented VFTO and partial discharge monitoring system 100 may be connected to the network 130 to exchange data and/or information.
The VFTO and partial discharge fusion monitoring sensor 150 may transmit the collected various data information to one or more devices in the VFTO and partial discharge monitoring system 100 for the GIS substation. For example, the VFTO and partial discharge fusion monitoring sensor 150 may send the collected data to the server 110 for processing or to the storage device 120 for storage.
FIG. 2 is a schematic diagram of an exemplary computing device 200 shown in accordance with some embodiments of the present application. The server 110, storage device 120, and VFTO and partial discharge fusion monitoring sensor 150 may be implemented on the computing device 200. For example, the processing engine 112 may be implemented on the computing device 200 and configured to implement the functionality disclosed herein.
For ease of understanding, only one processor is exemplarily depicted in fig. 2. However, it should be noted that the computing device 200 in the present application may include multiple processors, and thus the operations and/or methods described in the present application that are implemented by one processor may also be implemented by multiple processors, collectively or independently. For example, if in the present application a processor of computing device 200 performs steps 1 and 2, it should be understood that steps 1 and 2 may also be performed by two different processors of computing device 200, either collectively or independently.
Fig. 3 shows a schematic structural diagram of a VFTO and partial discharge monitoring system for a GIS substation according to an embodiment of the present application.
The VFTO and partial discharge monitoring system for the GIS transformer substation comprises at least one VFTO and partial discharge fusion monitoring sensor 1, an isolating switch 2 and a control terminal 3.
The fusion detection sensor is arranged at the partial discharge equipment to be monitored, is configured to be used for judging the VFTO and partial discharge of the system, and uploads and stores the VFTO information and the discharge information to the control terminal.
The VFTO and partial discharge fusion monitoring sensor is arranged at a position where partial discharge equipment needs to be monitored, and can judge the VFTO of the system, store and upload VFTO information to the control terminal; meanwhile, the VFTO and partial discharge fusion monitoring sensor can judge the partial discharge of the system, store and upload VFTO partial discharge information to the control terminal.
The isolating switch is configured between different VFTO and partial discharge fusion monitoring sensors. The isolating switch is a switching device which is mainly used for isolating power supply, switching operation and connecting and cutting off a small current circuit and has no arc extinguishing function. When the isolating switch is in the separated position, the contacts have insulation distance meeting the specified requirements and obvious disconnection marks; a switching device capable of carrying current in normal loop conditions and current in abnormal conditions (e.g., short circuit) for a specified period of time when in the closed position. The high-voltage isolating switch is generally used as a high-voltage isolating switch, namely an isolating switch with rated voltage of more than 1 kV.
The control terminal is configured to operate through the communication control VFTO and the partial discharge fusion monitoring sensor and the isolating switch. In some embodiments, the control terminal may also use mobile terminals, tablets, computers, laptops, and other smart devices.
Fig. 4 shows a schematic structural diagram of a VFTO and partial discharge fusion monitoring sensor according to an embodiment of the present application.
The VFTO and partial discharge fusion monitoring sensor comprises: partial discharge monitoring sensor (11), VFTO monitoring sensor (12), first data communication module (13), wireless power module (14) of response.
In some embodiments, the partial discharge monitoring sensor, the VFTO monitoring sensor, and the first data communication module are soldered to a MOS board by soldering, and the MOS board is packaged by using a ceramic capacitor.
The bandwidth of the partial discharge monitoring sensor and the VFTO monitoring sensor should be the same, and the VFTO monitoring sensor is required to have an extremely short response time and a wide frequency band.
Fig. 5 shows a schematic structural diagram of a disconnecting switch according to an embodiment of the present application.
The isolator includes: a switch operation module (21) and a second data communication module (22).
In some embodiments, the control terminal controls VFTO and partial discharge to fuse and monitor the behavior of the sensor and the isolating switch through communication, and the following steps are specifically performed:
firstly, the control terminal controls whether the VFTO and the partial discharge fusion monitoring sensor carry out VFTO monitoring or not.
And secondly, the control terminal controls the on and off of the isolating switch.
In some embodiments, the communication mode between the control terminal, the VFTO, the partial discharge fusion monitoring sensor and the isolating switch may be other communication modes such as a 4G signal, a 5G signal, a WiFi signal, and the like, and the communication mode is not particularly limited in the present application.
In some embodiments, the induction wireless power taking module includes a CT power taking circuit, also referred to as a power taking transformer, and a power conversion module. The power supply conversion module is responsible for converting the electric energy obtained by the CT electricity taking circuit into required direct current voltage.
The CT power taking circuit comprises a rectifying filter circuit, a DC/DC module circuit, an overvoltage protection circuit, a power failure detection circuit and a backup battery circuit, wherein current of a high-voltage line respectively enters a signal conversion circuit, the CT power taking circuit and the rectifying filter circuit after passing through a current sensor and an anti-surge protection circuit, the output end of the rectifying filter circuit is connected with the DC/DC module circuit, the overvoltage protection circuit and the power failure detection circuit, the output end of the DC/DC module circuit outputs direct-current voltage, and the output end of the power failure detection circuit controls whether the backup battery circuit outputs voltage to the whole system.
In some embodiments, the frequency band range of the VFTO monitor sensor is typically set between 0.1MHz to 1.5 GHz.
Fig. 6 shows a flowchart of a VFTO and partial discharge monitoring method for a GIS substation according to an embodiment of the present application.
In step 601, the control terminal starts the induction wireless power taking module, after the power is on, the control terminal starts the VFTO and the partial discharge fusion monitoring sensor to perform VFTO monitoring and system partial discharge monitoring, and the control terminal controls the isolating switch to perform on-off operation.
When the VFTO and the partial discharge are not monitored, the control terminal controls the isolating switch not to be switched on or switched off, and controls the VFTO and the partial discharge fusion monitoring sensor not to work; when VFTO and partial discharge monitoring is to be carried out, the control terminal firstly controls the induction wireless power taking module to work, after the control terminal is powered on, the control terminal controls the VFTO and partial discharge fusion monitoring sensor to work to carry out VFTO monitoring and partial discharge monitoring, and then the control terminal controls the isolating switch to carry out on-off operation.
In step 602, the VFTO and partial discharge fusion monitoring sensor uploads the measured VFTO and partial discharge information to the control terminal.
After the control terminal controls the isolating switch to be switched on or switched off, the VFTO and partial discharge fusion monitoring sensor uploads the measured VFTO and partial discharge information to the control terminal.
In step 603, the control terminal stores and analyzes the received information, stops the work of the VFTO and partial discharge fusion monitoring sensor, and can observe and process the measured VFTO and partial discharge information of the GIS equipment at the control terminal.
After the measured VFTO and partial discharge information are uploaded to the control terminal, the control terminal stores and analyzes the transmitted information, the control terminal controls the VFTO and the partial discharge fusion monitoring sensor to stop working, and an operator can observe and process the measured VFTO and partial discharge information of the GIS equipment at the control terminal.
In some embodiments, the VFTO of the VFTO and partial discharge fusion monitoring sensor monitoring system is implemented as follows: VFTO and partial discharge fuse monitoring sensor monitoring system voltage information, when control terminal control isolator carries out the operation of closure or disconnection, VFTO and partial discharge fuse monitoring sensor record VFTO initial time, VFTO amplitude and VFTO initial time two former power frequency cycle to four power frequency cycle's behind the VFTO initial time voltage waveform to with record information upload to control terminal. If the voltage waveform simultaneously meets the conditions that the rising time is 2-20ns, the amplitude is lower than 2.0pu (the extreme condition can reach 3.0pu), and the fundamental frequency is 5-10 MHz, the system is judged to have VFTO.
In some embodiments, the VFTO and partial discharge fusion monitoring sensor monitors partial discharge of the system by performing the following steps: the VFTO and partial discharge fusion monitoring sensor monitoring system voltage information is characterized in that when a control terminal controls an isolating switch to be switched on or switched off, if a partial discharge condition occurs, an antenna sensor arranged in the partial discharge monitoring sensor can receive an ultrahigh frequency electromagnetic wave signal of a 300-3000 MHz frequency band radiated by partial discharge to detect and analyze partial discharge, store the detected partial discharge information and upload the recorded information to the control terminal.
Moreover, those skilled in the art will appreciate that aspects of the present application may be illustrated and described in terms of several patentable species or situations, including any new and useful combination of processes, machines, manufacture, or materials, or any new and useful improvement thereon. Accordingly, various aspects of the present application may be embodied entirely in hardware, entirely in software (including firmware, resident software, micro-code, etc.) or in a combination of hardware and software. The above hardware or software may be referred to as "data blocks," modules, "" engines, "" units, "" components, "or" systems. Furthermore, aspects of the present application may be represented as a computer product, including computer readable program code, embodied in one or more computer readable media.
The computer storage medium may comprise a propagated data signal with the computer program code embodied therewith, for example, on baseband or as part of a carrier wave. The propagated signal may take any of a variety of forms, including electromagnetic, optical, etc., or any suitable combination. A computer storage medium may be any computer-readable medium that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device. Program code located on a computer storage medium may be propagated over any suitable medium, including radio, cable, fiber optic cable, RF, or the like, or any combination of the preceding.
Computer program code required for operation of various portions of the present application may be written in any one or more programming languages, including AN object oriented programming language such as Java, Scala, Smalltalk, Eiffel, JADE, Emerald, C + +, C #, VB.NET, Python, and the like, conventional programming languages such as C, Visual Basic, Fortran 2003, Perl, COBO L2002, PHP, ABAP, dynamic programming languages such as Python, Ruby, and Groovy, or other programming languages, and the like.
Additionally, the order in which elements and sequences of the processes described herein are processed, the use of alphanumeric characters, or the use of other designations, is not intended to limit the order of the processes and methods described herein, unless explicitly claimed. While various presently contemplated embodiments of the invention have been discussed in the foregoing disclosure by way of example, it is to be understood that such detail is solely for that purpose and that the appended claims are not limited to the disclosed embodiments, but, on the contrary, are intended to cover all modifications and equivalent arrangements that are within the spirit and scope of the embodiments herein. For example, although the system components described above may be implemented by hardware devices, they may also be implemented by software-only solutions, such as installing the described system on an existing server or mobile device.
Similarly, it should be noted that in the preceding description of embodiments of the application, various features are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure aiding in the understanding of one or more of the embodiments. This method of disclosure, however, is not intended to require more features than are expressly recited in the claims. Indeed, the embodiments may be characterized as having less than all of the features of a single embodiment disclosed above.
The entire contents of each patent, patent application publication, and other material cited in this application, such as articles, books, specifications, publications, documents, and the like, are hereby incorporated by reference into this application. Except where the application is filed in a manner inconsistent or contrary to the present disclosure, and except where the claim is filed in its broadest scope (whether present or later appended to the application) as well. It is noted that the descriptions, definitions and/or use of terms in this application shall control if they are inconsistent or contrary to the statements and/or uses of the present application in the material attached to this application.
Claims (9)
1. The utility model provides a VFTO and partial discharge monitoring system towards GIS transformer substation which characterized in that includes:
the system comprises at least one VFTO and partial discharge integrated monitoring sensor, a control terminal and a controller, wherein the VFTO and partial discharge integrated monitoring sensor is arranged at a partial discharge device to be monitored and is configured to be used for judging the VFTO and partial discharge of the system, uploading and storing VFTO information and discharge information to the control terminal;
the isolation switch is configured between different VFTO and partial discharge fusion monitoring sensors;
and the control terminal is configured to control the VFTO and the partial discharge fusion monitoring sensor and the isolating switch to operate through communication.
2. The GIS-substation-oriented VFTO and partial discharge monitoring system of claim 1,
the VFTO and partial discharge fusion monitoring sensor comprises: the device comprises a partial discharge monitoring sensor, a VFTO monitoring sensor, a first data communication module and an induction wireless power taking module;
the isolating switch comprises: switch operation module, second data communication module.
3. The GIS-substation-oriented VFTO and partial discharge monitoring system of claim 2,
the partial discharge monitoring sensor, the VFTO monitoring sensor and the first data communication module are welded on an MOS (metal oxide semiconductor) board by soldering, and the MOS board is packaged by using a ceramic capacitor;
the bandwidths of the partial discharge monitoring sensor and the VFTO monitoring sensor are the same, the response time of the VFTO monitoring sensor is smaller than a preset threshold, and the bandwidth is larger than the preset threshold;
the operations, comprising:
the control terminal controls the VFTO and the partial discharge fusion monitoring sensor to carry out or interrupt VFTO monitoring; and the control terminal controls the on and off of the isolating switch.
4. The GIS-substation-oriented VFTO and partial discharge monitoring system of claim 2,
the wireless electricity module of getting of response includes: the CT power taking circuit and the power supply conversion module;
the power supply conversion module is used for converting the electric energy of the CT electricity taking circuit into required direct-current voltage.
5. The GIS substation-oriented VFTO and partial discharge monitoring system of claim 4, wherein the CT power taking circuit comprises: the device comprises a rectification filter circuit, a DC/DC module circuit, an overvoltage protection circuit, a power failure detection circuit and a backup battery circuit.
6. The GIS-substation-oriented VFTO and partial discharge monitoring system of claim 2, wherein the frequency band of the VFTO monitoring sensor ranges from 0.1MHz to 1.5 GHz.
7. A VFTO and partial discharge monitoring method for a GIS substation is characterized by comprising the following steps:
the control terminal starts the induction wireless power taking module, after the power is on, the control terminal starts the VFTO and partial discharge fusion monitoring sensor to carry out VFTO monitoring and system partial discharge monitoring, and the control terminal controls the isolating switch to carry out on-off operation;
the VFTO and partial discharge fusion monitoring sensor uploads the VFTO and partial discharge information obtained through measurement to the control terminal;
the control terminal stores and analyzes the received information, stops the work of the VFTO and partial discharge fusion monitoring sensor, and can observe and process the measured VFTO and partial discharge information of the GIS equipment at the control terminal.
8. The GIS-substation-oriented VFTO and partial discharge monitoring method according to claim 7, wherein the VFTO monitoring specifically comprises:
monitoring system voltage information;
when the isolating switch is switched on or switched off, recording the VFTO starting time, the VFTO amplitude and voltage waveforms from two power frequency periods before the VFTO starting time to four power frequency periods after the VFTO starting time;
and uploading the recorded information to a control terminal, and if the voltage waveform rise time is 2-20ns, the amplitude is lower than 2.0pu and the fundamental frequency is 5-10 MHz, judging that the system generates VFTO.
9. The VFTO and partial discharge monitoring method for the GIS substation as claimed in claim 7, wherein the system partial discharge monitoring specifically comprises:
monitoring system voltage information;
when the isolating switch is switched on or switched off, if a partial discharge condition occurs, the antenna sensor arranged in the partial discharge monitoring sensor can receive ultrahigh frequency electromagnetic wave signals of a 300-3000 MHz frequency band radiated by partial discharge;
and detecting and analyzing the ultrahigh frequency electromagnetic wave signals to obtain partial discharge information, and storing and uploading the partial discharge information to a control terminal.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113325224A (en) * | 2021-06-24 | 2021-08-31 | 云南电网有限责任公司电力科学研究院 | GIS steep wave measurement system based on optical fiber pulse |
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