A method and device for on-line monitoring of resistive current of a voltage-limiting surge protector

A surge protector and resistive current technology, applied in the field of on-line monitoring of resistive current of voltage-limiting surge protectors, can solve the problems of a large number of surge protectors used, time-consuming and labor-intensive, complex structure, etc. The effect of convenient local area network monitoring, convenient and concise reading, safe and reliable work
CN104808050BActive Publication Date: 2017-10-24江苏全方气象科技发展有限公司
1 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
江苏全方气象科技发展有限公司
Publication Date
2017-10-24

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses an on-line monitoring method and device for the resistive current of a voltage-limiting surge protector. The method collects the surface temperature of the pressure-sensitive sheet in the surge protector and the total leakage current, and performs fast Fourier transform on the total leakage current. Transform to obtain the total resistive current, and through the calculation and processing of the total resistive current, obtain the 1-7th resistive harmonic current. The device includes a voltage signal acquisition module, a current signal acquisition module, a dsPIC chip processing module, an output module and an external clock module, and the voltage signal acquisition module, the current signal acquisition module and the external clock module are connected to the dsPIC chip processing module through an A / D conversion interface , the output module is connected with the dsPIC chip processing module; the invention can effectively coordinate the problem of distinguishing and extracting the current components of the online monitoring, and can reduce the production cost of the online monitoring voltage-limiting SPD resistive current device, which is convenient for local area network monitoring, and can Effectively reduce the failure of electrical fires or overvoltage protection failures caused by failure to detect in time after SPD deterioration.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to the technical field of lightning prevention equipment, in particular to an on-line monitoring method and device for resistive current of a voltage-limiting surge protector. Background technique

[0002] Surge protector (SPD) mainly uses shunt technology to quickly release pulse energy to limit the voltage amplitude on equipment and lines to achieve overvoltage protection. Its performance not only affects the safety of the entire power distribution system and communication system, It is also related to the economic benefits of operating the system. From the high-voltage system surge arresters that appeared in the 20th century to the current surge protectors for low-voltage circuits, the ultimate goal is to improve their shunt capacity. The types of existing surge protection devices mainly include switch type and voltage limiting type. The voltage limiting type surge protector uses zinc oxide as the main material. In the early 1...

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