CN116231857A - Ring main unit partial discharge monitoring system - Google Patents

Ring main unit partial discharge monitoring system Download PDF

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Publication number
CN116231857A
CN116231857A CN202310137485.8A CN202310137485A CN116231857A CN 116231857 A CN116231857 A CN 116231857A CN 202310137485 A CN202310137485 A CN 202310137485A CN 116231857 A CN116231857 A CN 116231857A
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CN
China
Prior art keywords
processor
intelligent
ring main
communication module
main unit
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Pending
Application number
CN202310137485.8A
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Chinese (zh)
Inventor
张有平
张旭
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XI'AN BOYUAN ELECTRIC CO Ltd
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XI'AN BOYUAN ELECTRIC CO Ltd
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Priority to CN202310137485.8A priority Critical patent/CN116231857A/en
Publication of CN116231857A publication Critical patent/CN116231857A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/00002—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by monitoring
    • 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
    • G01R31/1209—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 using acoustic measurements
    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/00001—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by the display of information or by user interaction, e.g. supervisory control and data acquisition systems [SCADA] or graphical user interfaces [GUI]
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
    • H02J13/00036—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Human Computer Interaction (AREA)
  • Acoustics & Sound (AREA)
  • Gas-Insulated Switchgears (AREA)
  • Testing Relating To Insulation (AREA)
  • Tests Of Circuit Breakers, Generators, And Electric Motors (AREA)

Abstract

The invention discloses a ring main unit partial discharge monitoring system which is used for realizing real-time monitoring of the insulation state of a ring main unit and remote transmission of data and is based on an intelligent ring main unit environment monitoring system, and belongs to the technical field of ring main unit monitoring.

Description

Ring main unit partial discharge monitoring system
Technical Field
The invention belongs to the technical field of ring main unit monitoring, is used for real-time monitoring of the insulation state of a ring main unit and data remote transmission, and particularly relates to a ring main unit partial discharge monitoring system.
Background
The monitoring of the operation state of the ring main unit relates to the reliability of power supply, and with the increasing of the requirements of a great deal of ring main units and users on the reliability of power supply, the monitoring of the safe operation environment of the ring main unit is more and more important; meanwhile, with the rapid development of electronic technology, new devices and new technologies are continuously emerging, and the possibility of further improving the operation state monitoring system of the ring main unit is provided; the ring main unit is a group of high-voltage switch equipment which is arranged in the steel plate metal cabinet body or is made into an electric equipment of an assembled interval ring main unit, and the core part of the ring main unit adopts a load switch and a fuse, so that the ring main unit has the advantages of low price, simple structure, small volume, capability of improving power supply parameters and performance, power supply safety and the like; the ring main unit is a switching unit commonly used in a power supply system, normal operation of the ring main unit is an important guarantee of power supply safety and stability, partial discharge is continuously generated when electric equipment is insulated under the operation voltage, dielectric properties of the insulation are gradually deteriorated, partial defects are enlarged, and finally the whole insulation breakdown is caused, so that the partial discharge is a potential hidden danger for the ring main unit, a ring main unit partial discharge monitoring system is required to be used for detecting, potential risks are found in time, and loss is reduced.
The existing partial discharge monitoring system and the partial discharge monitoring system based on the multiple sensors have the patent numbers of (CN 103616624B) and (CN 215678615U), realize the full life cycle monitoring and management of the power equipment, provide powerful guarantee for the safe and stable operation of the power system, improve the utilization rate of the equipment and reduce the equipment investment cost; in the actual monitoring process, the following problems exist in the technology: 1) The detection data time difference of the same ring main unit is relatively large; 2) The ring main unit partial discharge monitoring device is connected with the host through a communication line, and the power supply adopts a traditional power supply mode, so that the arrangement is troublesome; 3) The ring main unit partial discharge on-line monitoring system only provides discharge amplitude and discharge frequency and does not provide discharge map information; 4) The distribution network monitoring generally does not provide a phase extraction mode, which is unfavorable for subsequent judgment; therefore, aiming at the points, the invention provides a ring main unit partial discharge monitoring system to solve the problems in the prior art.
Disclosure of Invention
The invention aims to provide a ring main unit partial discharge monitoring system, which starts from two aspects of hardware circuits and bottom layer calculation, solves the problems of ring main unit insulation state monitoring and data remote transmission, reduces the workload of personnel of a transport and inspection unit, and can remotely observe ring main unit data and generate reports.
In order to solve the technical problems, the invention adopts the following technical scheme: the utility model provides a looped netowrk cabinet partial discharge monitoring system, this system is realized based on looped netowrk cabinet environment intelligent monitoring system, includes intelligent detection unit and intelligent sink node, intelligent detection unit is used for gathering the inside ultrasonic wave signal of looped netowrk cabinet and electric wave signal and handles, and through intelligent sink node with looped netowrk cabinet environment intelligent monitoring system connects and shows.
The intelligent detection unit comprises an intelligent sensor, the intelligent sensor comprises a signal demodulator, a processor, a communication module, a memory card, a lithium battery, a crystal oscillator, a third transistor and a button cell, wherein the communication module, the memory card, the signal demodulator and the crystal oscillator are respectively and electrically connected with the processor, the button cell is electrically connected with the crystal oscillator through the third transistor, the lithium battery is electrically connected with the processor, the third transistor and the crystal oscillator through a power supply control circuit, and the signal demodulator amplifies ultrasonic signals and ground wave signals, processes and transmits the ultrasonic signals and the ground wave signals to the communication module through the processor, and transmits the ultrasonic signals and the ground wave signals to the intelligent convergence node through the communication module.
The intelligent sink node comprises a processor, a communication module, a memory card, a lithium battery and a crystal oscillator, wherein the communication module, the memory card, a power supply and the crystal oscillator are respectively and electrically connected with the processor, and signals processed by the processor are transmitted to the ring main unit environment intelligent monitoring system through the communication module.
The program of the processor is provided with time, the button battery and the crystal oscillator provide power supply and clock signals for the processor, the signal demodulator is a signal conditioning circuit, and the signal conditioning circuit is respectively provided with a TEV partial discharge sensor and an ultrasonic sensor and is electrically connected with the TEV partial discharge sensor;
the implementation of the intelligent sensor comprises the following steps:
step one: the processor operates at fixed time, the processor sends a starting instruction to the triode through the instruction, the triode is conducted, the button cell, the crystal oscillator provide power for the signal conditioning circuit and the communication module, the processor acquires signals, and the communication module and the intelligent sink node pair time;
step two: the signal acquisition, the ultrasonic wave signal and the ground electric wave signal received by the ultrasonic wave sensor and the TEV partial discharge sensor are amplified by the signal conditioning circuit and transmitted to the processor for processing;
step three: the method comprises the steps of data processing, setting sampling frequency and sampling length corresponding to 1 second by a processor, collecting an array, storing the array in a memory card, transmitting data of the memory card to an intelligent sink node through the processor and a communication module, carrying out data remote transmission, dividing the array at a receiving end into 50 parts, wherein each part is 20ms data, corresponding to one power frequency period, equally dividing the number of corresponding points of each part of 20ms data by 360 degrees, extracting phase information and amplitude information of the 20ms data, accumulating the 50 power frequency periods, namely forming partial discharge diagram information, closing the processor after data collection and transmission are completed, closing a power supply, and enabling an intelligent sensor to enter a sleep mode.
Compared with the prior art, the invention has the following advantages:
the ring main unit partial discharge monitoring system provided by the invention is realized based on the ring main unit environment intelligent monitoring system, the intelligent detection unit collects and processes ultrasonic signals and ground wave signals in the ring main unit, and is connected and displayed with the ring main unit environment intelligent monitoring system through the intelligent sink node, so that the ring main unit insulation state monitoring and data remote transmission are realized, the workload of operation and detection unit personnel is reduced, the ring main unit data observation and report generation can be remotely carried out, the ring main unit insulation state is controlled in real time, the potential risk is found in time, and the loss is reduced.
Drawings
FIG. 1 is a schematic diagram of a system architecture of the present invention;
FIG. 2 is a schematic diagram of a signal conditioning circuit according to the present invention;
FIG. 3 is a schematic diagram of a power control circuit according to the present invention;
fig. 4 is a schematic diagram of an intelligent sink node according to the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.
As shown in fig. 1, the ring main unit partial discharge monitoring system is realized based on an intelligent ring main unit environment monitoring system and comprises an intelligent detection unit and an intelligent sink node, wherein the intelligent detection unit is used for collecting and processing ultrasonic signals and ground wave signals in the ring main unit, and is connected and displayed with the intelligent ring main unit environment monitoring system through the intelligent sink node; the ring main unit partial discharge monitoring system is arranged inside the ring main unit, the intelligent detection unit collects and processes ultrasonic signals and ground wave signals inside the ring main unit, the intelligent sink node is connected with the ring main unit environment intelligent monitoring system and displays the ultrasonic signals and ground wave signals, the ring main unit insulation state monitoring and data remote transmission are realized, the workload of operation and detection unit personnel is reduced, the ring main unit data observation and report generation can be remotely carried out, the ring main unit insulation condition is controlled in real time, potential risks are found in time, and the loss is reduced.
As shown in fig. 2, fig. 3 and fig. 4, in this embodiment, the ring main unit environment intelligent monitoring system is HT510, which is manufactured by the constant titanium intelligent technology limited company of the security electric department, the processor is an STM32 processing system, and the communication module is a LORA communication module; the system is realized based on an intelligent ring main unit environment monitoring system and comprises an intelligent detection unit and an intelligent sink node, wherein the intelligent detection unit comprises an intelligent sensor, the intelligent sensor comprises a signal demodulator, a processor, a communication module, a memory card, a lithium battery, a crystal oscillator, a third tube and a button battery, the communication module, the memory card, the signal demodulator and the crystal oscillator are respectively and electrically connected with the processor, the button battery is electrically connected with the crystal oscillator through the third tube, the lithium battery is electrically connected with the processor, the third tube and the crystal oscillator through a power supply control circuit, a TEV partial discharge sensor and an ultrasonic sensor are arranged on the signal demodulator, the signal demodulator amplifies ultrasonic signals and ground electric wave signals and transmits the ultrasonic signals and ground electric wave signals to the communication module through the processor, and the signal demodulator is transmitted to the intelligent sink node through the communication module and is displayed by the intelligent ring main unit environment monitoring system, the intelligent sink node comprises a processor, a communication module, a memory card, a lithium battery, the crystal oscillator, a monitoring module, a memory card, the lithium battery and the crystal oscillator are respectively and electrically connected with the processor, and signals processed by the processor are transmitted to the ring main unit through the communication module and the intelligent ring main unitA system; the processor is mainly used for carrying out partial discharge data calculation and logic control, the partial discharge data calculation is mainly used for carrying out segmentation and maximum value calculation on data when an original acquisition signal is acquired at the bottom layer so as to reduce the original data quantity, the data in 1S is acquired in a sampling mode for transmission, 50 power frequency periods of 20ms data can be provided, and the background is used for carrying out data segmentation and superposition so as to realize the uploading of a map; the processor further comprises a step of carrying out time synchronization once after each intelligent sensor carries out data communication, so that the second-level time difference of each intelligent sensor device can be realized, the transverse comparison of ring main unit data can be realized, and the position of the cabinet body with insulation fault can be judged; the battery supplies power to the processor, the communication module and the memory card through the power supply circuit; the crystal oscillator provides clock information for the processor; the signal demodulator mainly amplifies and filters ultrasonic signals and ground wave signals for the signal conditioning circuit, wherein the signal conditioning circuit is internally connected with an ultrasonic sensor AE which is connected with C7, the C7 is connected with R2 to form a high-pass filter, and the low-frequency cutoff frequency f=1/2 pi R 2 C, performing operation; r10 and R2 are connected with +5V to form a voltage dividing circuit, and are connected with a positive input pin 3 of the amplifier U1; r3, R4 and R5 are connected with the negative feedback and output end to form negative feedback amplification for amplifying the ultrasonic signal; the TEV sensor and C1, R7 and C2 form impedance matching and filtering functions f=1/2 pi R 7 C, after the signal processing, the signals enter a logarithmic detection device to realize detection of signals from 3MHz to 100MHz, and the sampling frequency of the system is reduced; the triode is used for powering the signal conditioning circuit and the communication module, and is realized by the Q1 and Q2 field effect transistors, and the button cell provides power for the crystal oscillator; the storage U3 is mainly used for storing an operation program; and the LORA communication is used for carrying out data interaction on the data processed by the intelligent sensor through the LORA communication module and the LORA communication module of the intelligent data sink node, transmitting the data of the intelligent sensor to the intelligent data sink node, processing the data through an internal processor, and transmitting the data to the ring main unit environment intelligent monitoring system through the communication module in a modbus485 mode and displaying the data.
As described in fig. 1, 2 and 4, the implementation steps of the intelligent sensor are as follows: step 1: STM32 processing System U1 is sometimes in programThe device is provided with a button battery U7 and a crystal oscillator U5, power supply and clock signals are provided for a U1 system, a processing system U1 operates at fixed time, the processing system U1 sends a starting instruction to a triode D1 through an instruction, the triode D1 is conducted, and a battery power supply system U4 provides power for an analog circuit U6 and LORA communication U2. The processing system U1 performs signal acquisition. The intelligent sensor and the intelligent sink node pair time; step 2: the signal acquisition is carried out, firstly, an ultrasonic sensor receives an ultrasonic signal through an analog circuit U6, and a high-pass filter is formed by connecting C1 and R2; r1 and R2 are connected with +5V to form a voltage dividing circuit, and are connected with a positive input pin 3 of the amplifier U1; R6R 5C 4 is connected with the negative feedback and the output end to form negative feedback amplification; the amplified signals enter an AD acquisition system of STM32, and enter the acquisition system for processing after analog-digital conversion; the TEV sensor and C1, R7 and C2 form impedance matching and filtering work f=1/2 pi R 7 C, after signal processing, the signals enter a logarithmic detection device to realize detection of signals from 3MHz to 100MHz, and J signals are input into a collection system for processing; step 3, data processing, STMS32 system, setting sampling frequency and sampling length corresponding to 1 second, collecting array A1, storing array into U3; step 4, the stored U3 data is transmitted to an intelligent sink node LORA communication U21 through an STM32 system U1 and an LROA communication U2, the intelligent sink node carries out data remote transmission through 485, a receiving end array A1 is divided into 50 parts, each part is 20ms data corresponding to one power frequency period, the corresponding points of each part of 20ms data are equally divided into 360 degrees, the phase information and the amplitude information of the 20ms data can be extracted, 50 power frequency periods are accumulated, namely partial discharge diagram information is formed, and step 5: after data acquisition and transmission are completed, the STM32 system U1 is closed to D1, the power supply is closed, the intelligent sensor enters a sleep mode, ring main unit insulation state monitoring and data remote transmission are realized, the workload of operation and detection unit personnel is reduced, ring main unit data observation and report generation can be remotely carried out, the ring main unit insulation condition is controlled in real time, potential risks are found in time, and loss is reduced.
The foregoing description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and any simple modification, variation and equivalent structural changes made to the above embodiment according to the technical substance of the present invention still fall within the scope of the technical solution of the present invention.

Claims (4)

1. The utility model provides a looped netowrk cabinet partial discharge monitoring system, this system is realized based on looped netowrk cabinet environment intelligent monitoring system, its characterized in that, including intelligent detection unit and intelligent sink node, intelligent detection unit is used for gathering inside ultrasonic wave signal of looped netowrk cabinet and ground electricity ripples signal and processing, and through intelligent sink node with looped netowrk cabinet environment intelligent monitoring system connects and shows.
2. The ring main unit partial discharge monitoring system of claim 1, wherein: the intelligent detection unit comprises an intelligent sensor, the intelligent sensor comprises a signal demodulator, a processor, a communication module, a memory card, a lithium battery, a crystal oscillator, a third transistor and a button cell, wherein the communication module, the memory card, the signal demodulator and the crystal oscillator are respectively and electrically connected with the processor, the button cell is electrically connected with the crystal oscillator through the third transistor, the lithium battery is electrically connected with the processor, the third transistor and the crystal oscillator through a power supply control circuit, and the signal demodulator amplifies ultrasonic signals and ground electric wave signals, processes and transmits the ultrasonic signals and the ground electric wave signals to the communication module through the processor, and transmits the ultrasonic signals and the ground electric wave signals to the intelligent convergence node through the communication module.
3. The ring main unit partial discharge monitoring system of claim 1, wherein: the intelligent sink node comprises a processor, a communication module, a memory card, a power supply and a crystal oscillator, wherein the communication module, the memory card, the power supply and the crystal oscillator are respectively and electrically connected with the processor, and signals processed by the processor are transmitted to the ring main unit environment intelligent monitoring system through the communication module.
4. The ring main unit partial discharge monitoring system of claim 2, wherein: the program of the processor is provided with time, the button battery and the crystal oscillator provide power supply and clock signals for the processor, the signal demodulator is a signal conditioning circuit, and the signal conditioning circuit is respectively provided with a TEV partial discharge sensor and an ultrasonic sensor and is electrically connected with the TEV partial discharge sensor;
the implementation of the intelligent sensor comprises the following steps:
step one: the processor operates at fixed time, the processor sends a starting instruction to the triode through the instruction, the triode is conducted, the button cell, the crystal oscillator provide power for the signal conditioning circuit and the communication module, the processor acquires signals, and the communication module and the intelligent sink node pair time;
step two: the signal acquisition, the ultrasonic wave signal and the ground electric wave signal received by the ultrasonic wave sensor and the TEV partial discharge sensor are amplified by the signal conditioning circuit and transmitted to the processor for processing;
step three: the method comprises the steps of data processing, setting sampling frequency and sampling length corresponding to 1 second by a processor, collecting an array, storing the array in a memory card, transmitting data of the memory card to an intelligent sink node through the processor and a communication module, carrying out data remote transmission, dividing the array at a receiving end into 50 parts, wherein each part is 20ms data, corresponding to one power frequency period, equally dividing the number of corresponding points of each part of 20ms data by 360 degrees, extracting phase information and amplitude information of the 20ms data, accumulating the 50 power frequency periods, namely forming partial discharge diagram information, closing the processor after data collection and transmission are completed, closing a power supply, and enabling an intelligent sensor to enter a sleep mode.
CN202310137485.8A 2023-02-20 2023-02-20 Ring main unit partial discharge monitoring system Pending CN116231857A (en)

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Application Number Priority Date Filing Date Title
CN202310137485.8A CN116231857A (en) 2023-02-20 2023-02-20 Ring main unit partial discharge monitoring system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310137485.8A CN116231857A (en) 2023-02-20 2023-02-20 Ring main unit partial discharge monitoring system

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CN116231857A true CN116231857A (en) 2023-06-06

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116643131A (en) * 2023-07-14 2023-08-25 北京瑞天恒业科技发展有限公司 Ring main unit body insulation detection device and use method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116643131A (en) * 2023-07-14 2023-08-25 北京瑞天恒业科技发展有限公司 Ring main unit body insulation detection device and use method
CN116643131B (en) * 2023-07-14 2023-12-29 北京瑞天恒业科技发展有限公司 Ring main unit body insulation detection device and use method

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