In the power grid environment with frequent lightning strikes and aging equipment, lightning arresters, as the core device of lightning protection systems, have a direct impact on the safety of the power grid. Digital leakage current meter for lightning arrester (measured and controlled by LiOu)LE-MOA-601For example, through digital technology innovation, traditional manual inspections have been upgraded to real-time online monitoring, building a foundation for the power grid24Hourly uninterrupted“Digital protective net”.

1、 Full parameter monitoring: Uncovering the lightning arrester“Health password”

This device breaks through the limitations of traditional single parameter measurement and can synchronously capture four core parameters of lightning arrester: full current, resistive current, capacitive current, and harmonic components. In a certain location in Guangdong500kVIn the actual measurement of the substation, the proportion of resistive current in the system is determined by the conventional method15%Rise to28%）Advance3A monthly warning was issued for the aging of zinc oxide valve plates, which prevented a lightning arrester explosion accident. its24High precision positioningADCSampling technology enables full current measurement accuracy to reach±0.5%Control the resistive current error within±1%Improved compared to traditional pointer instruments10Double precision.

2、 Intelligent diagnostic system: a leap from data to decision-making

The equipment is equipped with“Resistive current-temperature”Bivariate analysis algorithm, capable of automatically identifying valve plate moisture, surface contamination, etc8Typical fault modes of the class. In the application case of Inner Mongolia wind farm, the system exhibits abnormal harmonic components（3The proportion of subharmonics suddenly increases12%）Accurately diagnose the internal structural deformation of lightning arresters, ahead of conventional power outage tests45Heaven discovered a defect. Level 3 alarm threshold setting (warning)/call the police/Urgent cooperation with local authoritiesLEDIndication and relay dry contact output, forming“monitor-diagnosis-disposal”The complete closed loop.

3、 Industrial grade reliability: adaptable to extreme operating environments

The equipment adopts a triple protection system: the hardware filtering circuit can suppress10kV/mElectromagnetic interference, software digital filtering to eliminate spike noise,TVSpipe+Gas discharge tubes form an overvoltage protection network. In the long-term testing of a substation on the Qinghai Tibet Plateau,IP65The protection level successfully withstood strong ultraviolet rays, sandstorms, and-40℃Extreme cold test, continuous operation2Year without malfunction. Industrial Wide Voltage Input Design（AC/DC 220V±20%）Make it more suitable for the fluctuating power supply environment of new energy power stations in remote areas.

4、 Wired remote transmission technology: constructing a neural network for power grid monitoring

passRS485Bus implementation1200Meter long distance data transmission, supportingModbus-RTUThe protocol is directly connected to the power integrated automation system. In the deployment of the power grid in a city in East China,23The monitoring network formed by the networking of equipment enables the dispatch center to access the real-time status of lightning arresters at each node, and the data refresh rate is flexible and adjustable（1s~60min）. Compared to wireless transmission solutions, wired communication has improved stability300%The annual failure rate is lower than0.3%.

5、 Full lifecycle management: reducing operational costs

Power free installation technology reduces the live connection time of equipment to20Minutes, historical data loop storage (supports)30Continuous daily records provide a complete chain of evidence for fault tracing. Specialized debugging software can remotely configure parameters and upgrade firmware. A provincial power company has increased the frequency of on-site maintenance from monthly to monthly through this feature4Reduced to annual2Secondly, the annual operation and maintenance cost of a single device is saved1.2Ten thousand yuan.

From the ultra-high voltage transmission corridor to the urban distribution network, the digital leakage current meter of lightning arresters is improving“Accurate monitoring, intelligent diagnosis, reliable transmission, and convenient operation and maintenance”Four major advantages, redefining the operation and maintenance standards of lightning protection devices. Its every second1000The ability to collect data and99.9%The transmission reliability not only protects the power grid from lightning strikes, but also provides key data support for smart grid strategies such as condition based maintenance and asset lifecycle management. For the power industry that pursues intrinsic safety, this is not only an upgrade of monitoring tools, but also a digital leap in the risk prevention and control system of the power grid.