“there have been 169 lightning discharges over the past four years from a 2,000-metre distribution grid line.” this is a set of data observed by electricity providers in the town of hengquan, huamong county, liang city, indicating a high frequency and intensity of lightning activity in lijiang. Disasters such as electric shocks and forest fires are frequent every year, causing the grid to fail。
In recent days, the first highland area in the country has completed a model area for the monitoring of lightning failure in the distribution grid, using a grid-default protection system, which has not only further increased the level of mine-proofing and mine-proofing of grid lines in the area, but has also allowed for the precise location of mine failure points, with an 80 per cent reduction in the number of jumps caused by lightning strikes in local areas。
Thunder alert, lightning optical observation, lightning locator, source: yunnan daily
The project, led by yunnan electric networks of the south, implemented by lijiang power authority and in association with various units such as yunnan electronics college, chongqing university and china university of science and technology, has resulted in the development, over a period of 10 years, of a grid-default protection system and high-precision mine detection station, over-voltage monitoring unit, insulation alternative mine avoidance unit, optical monitoring unit, four series of products with a total of over 10 invention patents that will effectively improve the electrical reliability of the distribution network by providing early warning, statistical analysis, risk assessment, failure rapid location, and backstage applications to the highland area。
Currently, a total of 120 highland grid lightning protection systems are installed in the model area, with a 20 km mine escape route. Following an earlier test run, the number of thunder-throwers per year dropped sharply from 78 to 7 per year, for example, using a more severe 10-kilovolt perturbation line。
“the june to september period is a period of high thunderstorms, when the line is fitted with a lightning shield like a `golden bell mask' and the cumulative breakdown in the jurisdiction has dropped from 34 times last year to 2 times.” dun warning, director of yong-hyun power station, wahpung county。
At present, this breakthrough technological innovation is continuing to work to ensure the stable functioning of the distribution grid in the highlands, while providing continuous green power for the development and livelihood of local industries such as mangoes, teas and silicon photovoltaics。
In the fire plant, 20-inch-sized creeping robots climb upwards while detecting defects in the boiler's cold-wall pipe with a probe, data are transmitted back to the computer system in real time and automatically analysed, such as the discovery of defects in the interior of the water cold-wall pipe, such as decomposition, corrosion, cracking, etc., are immediately indicative of the maximum reduction of the unplanned stoppage of the generator unit due to defects, and the stabilization of the power plant。
Crawling robot tests
This was the first successful application of the technology of high-precision vortex vortex detection by reptile robots, pioneered by the yunnan electric experiment institute (cif) at large fire power plants throughout the province, in the detection of leaks in boilers by yunnan energy inc., marking a new breakthrough in the intelligent operation of the yunnan fire electric unit. Based on the principle of electromagnetic induction, the climber robot carries five vortex detection probes, allowing full automatic coverage of the boiler water cold wall tube and detection of accuracy up to millimetre level. This creeping “smart eye” is more precise, faster and wider in scope than traditional detection techniques, with a marked increase in detection safety。
“it is particularly important that yunnan enters the hydro-water runoff period in october, that the spring of the winter provides fire power, and that creeping robots can play a key role in the annual overhaul.” wang xingwen, a technical expert at the yunnan power experiment institute (centro group), indicated that, as a next step, the technology would be replicated in the fire plant in yunnan to provide more pathways for the safe, efficient and green development of the electricity sector。
