The electronic truth is: the use of the electric field change rate alarm is actually a kind of identification alarm after lightning occurs, and the data accuracy is far lower than the data of the lightning location system. The use of rate-of-change early warning itself is based on external electrical changes, which has already represented the occurrence of lightning, so the electronic probe is not a real atmospheric electric field meter, and the early warning lags behind the field grinding type. ●Selected materials can resist acid pollution and are suitable for various harsh environments. ●The system can be networked and can be used in conjunction with other meteorological equipment. ●Can realize remote monitoring. ●Established a multi-product database system for data storage and analysis. By continuously sampling the atmospheric electric field at the installation site by the atmospheric electric field meter, we can know the local electric field intensity, and when a thunderstorm occurs, the electric field intensity will change sharply. A lightning imminent warning occurs. Lightning early warning system is currently recognized as one of the most effective measures to greatly reduce lightning casualties and disasters.

Anhui Jinli lightning early warning system adopts field grinding electric field meter, which is a highly centralized software and hardware system integrating atmospheric electric field intensity monitoring and lightning near-warning. The field grinding lightning early warning system adopts DC brushless motor to It rotates at a uniform speed to realize the switching between shielding and non-shielding of the stator. The stator is an electric field induction surface, so as to obtain a changing current signal (Q=ε*S*E). It uses the measured electric field, electric field change rate, electric field mean value three Method technology can achieve 0% false alarm rate. The truth of the field grinding probe is: the anti-interference ability is relatively strong, the collected electric field value data is accurate and stable, and it can achieve early warning even if the first lightning occurs locally.

Large oil and gas depots have always been a high-risk area for lightning protection. In January 2022, the State Council Work Safety Committee issued the "National Centralized Control Plan for Safety Risks of Hazardous Chemicals" (hereinafter referred to as the "Governance Plan"). "Some large oil and gas storage bases such as national oil reserves have a low level of intrinsic safety, and the "four systems" of emergency shutdown, gas detection, video surveillance, and lightning early warning are imperfect." On February 24, the Ministry of Emergency Management became dangerous In accordance with the requirements of the Work Plan for Implementing Safety Risk Management and Control Measures for Large-scale Oil and Gas Storage Bases issued by the State Council Security Committee, the Second Division of Supervision and Management organized the compilation of the Basic Requirements for Lightning Early Warning Systems for Large-scale Oil and Gas Storage Bases (for Trial Implementation) Basic Requirements for Emergency Shutdown Systems for Gas Storage Enterprises (Trial Implementation)" to ensure that large-scale oil and gas storage bases are equipped and applied with lightning warning systems and rectification of emergency shutdown system problems before June 30, 2022.

There is a speed called China Speed, and there is a pride called China High Speed Rail. With the rapid development of China's electrified railways, high-speed railway electrical and electronic equipment is gradually developing towards systematization and integration, and the equipment is resistant to overcurrent. The level is getting lower and lower, which leads to the increasingly serious damage to railway system equipment caused by the intrusion of strong electricity such as lightning and induced overvoltage, which not only causes a large number of primary equipment to burn down, but also causes many secondary equipment damage. Accidents such as the exit of the integrated automation system and the tripping of the network switch have seriously affected the safe and reliable operation of the railway system. In order to solve the problem of strong electricity (including lightning overvoltage and power frequency overvoltage) to the secondary system of railway traction substation Harm, China Railway Corporation issued "Transportation and Supply Equipment Letter [2016] No. 325 "Guiding Opinions on Optimizing Technical Schemes for Preventing Intrusion of Strong Electricity in Secondary Systems of Traction Substations" on September 1, 2016, and in 2017 July 12th Document [2017] No. 240 "Implementation Plan for Optimal Setting of Surge Protectors in Traction Substations".

I. Introduction With the rapid development of modernization construction and the wide application of power electronic technology, the threat posed by lightning is becoming more and more serious. Taking chemical enterprises as an example, there are many towering structures on site, which are easily invaded by lightning in thunderstorm weather Induced lightning current is generated on the internal power cables and signal cables, which is extremely harmful to the normal production of enterprises, and lightning safety protection measures have attracted the attention of users. II. Although chemical companies conduct lightning protection inspections every year in accordance with GB/T 21431-2015 "Technical Specifications for Detection of Lightning Protection Devices in Buildings". However, during the thunderstorm season, the following problems still exist in operation: 1) The communication port of DCS or PLC instrument automation system is easily damaged; 2) The outdoor monitoring system of the tank farm is easily damaged; 3) The inverter is easy to trip. The user system is checked and found that there are still defects in the overall lightning protection comprehensive configuration, mainly including the following points: a) The corrosion of external lightning protection facilities (down conductors) is more serious; b) There are still many unreliable connections in the equipotential connection between the field equipment cabinet shell or passive conductive components, either unconnected or the connection line is loose; c) The on-site lightning protection wiring is unreasonable; d) Symbolic configuration of surge protector.

The 36mm large current and T1-level backup integrated surge protector products have been trial-produced in small batches and can be supplied in batches. Jinli marketing promotion of the technical department is also fully recommended.

The intelligent joint control technology of the inverter and the tracking bracket (SDS intelligent tracking algorithm), combined with the intelligent string inverter, aims to realize the linkage optimization of the inverter and the bracket control, and further improve the additional effect of the tracking bracket. SDS technology can realize the linkage and closed-loop control of the inverter and the tracking bracket control system, and always keep the power station system running in a state with the largest amount of light received by the components and the best power output. And it does not require additional sensing equipment, gets rid of manual and experience dependence, uses AI technology to automatically perceive occlusion and weather change information, and automatically performs tracking angle optimization and control. Currently, it has cooperated with most mainstream bracket manufacturers. "At present, whether it is morning or evening, the phenomenon of blocking the front and rear rows of the power station is basically gone, and the power generation in cloudy and rainy days has increased significantly. Although SDS is only a small-scale application, it has already brought us benefits. "If it is applied to the entire 200MW power station, according to The same increase ratio, excluding subsidies, is conservatively estimated to bring nearly 2 million yuan in revenue. " The application value of high-efficiency modules, inverters and tracking systems has been recognized by end customers, and the application ratio will increase rapidly, but to make the photovoltaic system play a greater potential, simple patchwork is far from enough, and it is impossible to create a future-oriented smart system. Practical application cases have also verified once again that only by coordinating and integrating high-efficiency equipment and making joint optimization, can the efficiency of equipment and systems be maximized, and the power station can generate electricity vigorously throughout its life cycle.

The replacement of products is the law of industry development. People usually pay attention to the performance quality of products, but often ignore the time quality of products, that is, reliability. The introduction of any new product should provide users with the performance quality, time quality and economic indicators of the product. The main methods to improve the reliability of SPD include: a. Manufacturers improve MOV chip designs, adopt new materials and improved processes, and produce products with low failure rates and improve inherent reliability. b. Provide a good environment such as suitable temperature, humidity and air pressure to maintain environmental reliability. c. Screen and age the SPD to shorten the early failure period. d. Replace deteriorating SPDs as appropriate or periodically. e. Select an intelligent SPD and monitoring system capable of life early warning. f. Derating design is the main method to improve SPD reliability. The derating design is to reduce the electrical stress (surge) that the SPD bears. Reasonable derating can greatly reduce the failure rate of the SPD.