AC-DC lightning arrester real-time online monitoring device
A monitoring device and arrester technology, applied in measurement devices, instruments, measuring electricity and other directions, can solve the problems of inability to evaluate the leakage current level of the DC arrester, the inability of staff to perform regular on-site maintenance, and the difficulty of measuring the DC current, etc., to meet real-time monitoring requirements. Demand, high integration, high precision effect
Active Publication Date: 2017-09-05
ELECTRIC POWER RES INST OF GUANGXI POWER GRID CO LTD +1
View PDF15 Cites 7 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
This monitoring method has three disadvantages: (1) Intrusive installation affects the normal operation performance of the arrester; (2) The two devices are installed separately, requiring a large volume; (3) It is difficult to measure the DC current, so that it is impossible to evaluate the leakage current level of the DC arrester
[0005]
As far as the supporting communication device of the arrester monitoring system is concerned, considering that arresters are widely distributed in the power system (the distance between substations is usually as long as hundreds of kilometers), the staff cannot carry out frequent and regular on-site maintenance, so cables are used to monitor the status of arresters. Signal transmission is costly
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0020] The technical solutions in the present invention are clearly and completely described below in combination with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0021] Such as figure 1 As shown, the AC / DC arrester real-time online monitoring device provided by the present invention includes a Rogowski coil, a Hall sensor 3, a magnetic ring 2 with parallel openings, a signal processing system 7 and a shielding insulation protection box 15, the Rogowski coil, The Hall sensor 3, the magnetic ring 2 with parallel openings, and the signal processing system 7 are all arranged in the shielding insulation protection box 15, and a throug...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses an AC-DC lightning arrester real-time online monitoring device, and relates to the technical field of power system measurement and online monitoring. According to the AC-DC lightning arrester real-time online monitoring device, a Hall sensor and a Rogowski coil are adopted to realize complementary monitoring of the current signals of the grounding lead wire of a lightning arrester, the monitored signals are transmitted to a signal processing system to be analytically calculated, and finally the calculation result is transmitted to a remote control system through an LoRa wireless communication module so that unmanned intelligent monitoring of the lightning arrester can be realized and safe and reliable operation of the power system can be guaranteed. Non-invasive installation of the Hall sensor and the Rogowski coil is adopted so that the normal operation performance of the lightning arrester is not influenced, the DC current can be measured through complementary monitoring, and real-time online monitoring of the leakage current waveform and the impact current waveform of the lightning arrester can be realized.
Description
technical field [0001] The invention belongs to the technical field of power system measurement and on-line monitoring, and in particular relates to a real-time on-line monitoring device for an AC / DC arrester. Background technique [0002] Surge arrester is an important equipment often used in power cables to prevent lightning and other damage, and is one of the most widely used basic equipment in lightning protection systems. Surge arresters, also known as overvoltage protectors, can not only limit the freewheeling amplitude of overcurrents such as lightning strikes, but also limit the freewheeling time. The arrester has nonlinear characteristics. Under normal voltage, it has high resistance characteristics, allowing only tens of microamps of leakage current to pass through; under lightning and operating overvoltage, the arrester presents low resistance characteristics, allowing thousands of amperes to pass through. It can effectively limit the voltage at both ends of the ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More IPC IPC(8): G01R31/02G01R19/00
CPCG01R19/00G01R31/50
Inventor 尹立群胡军郭丽娟王中旭张玉波欧阳勇张炜何金良颜海俊王善祥
Owner ELECTRIC POWER RES INST OF GUANGXI POWER GRID CO LTD