According to the National Fire Protection Association, a study by Georges, Thomas, and others concluded that modern power grids are inherently susceptible to overvoltage because they employ equipment with low insulation levels, which is the root cause of more than 40% of unexpected electronic equipment failures. The cause was a lightning strike. Therefore, the field performance of surge protective devices (SPDs) has been extensively studied since the surge protection of low-voltage power supplies, where the power grid's reliability is crucial.  Accurate SPD modeling is necessary to assess overvoltage mitigation properly, assess stress on protected equipment, and conduct sound risk assessment studies for direct and indirect lightning-related surges. The experimental method for modeling they proposed is: a generalized equivalent lumped circuit model for surge protectors, which includes: 1) Integrating the inherent capacitance C S and switch S(V,t) of the voltage switching element (spark gap, gas tube, etc.), the switch is closed when overvoltage causes SPD to flash; if there is no voltage switching element (voltage limiting SPD), then the rectangular dashed box in Figure 4 can be replaced by an ideal short circuit. 2) Nonlinear current-dependent resistance R(i); the latter is mainly dominated by the field-dependent resistivity of voltage-limiting components (varistors, avalanche diodes, etc.), and is supplemented by the current-dependent arc resistance of voltage switching components; R(i) also Contains the inherent resistance of the SPD conductive path. 3) Inductance L, related to the inherent inductance of the SPD conductive path and the similar inductive behavior of the protection components, especially the hole effect when conducting surge current through the varistor. 4) Capacitance C R represents the inherent capacitance of the voltage limiting component; resistance R S determines the minimum resistive leakage current of the voltage switching component; if there is no voltage limiting component (voltage switch SPD), C R can be replaced by an ideal open circuit, and C S, R S should be connected in parallel to R(i) and S(V,t) in series, that is, between B and C'. Since its establishment in 2006, Jinli Electric has been deeply involved in surge protectors for nearly two decades, adhering to the corporate mission of "creating the world's No. 1 lightning protection brand to protect users from lightning intrusion". Self-developed and produced surge protectors for charging piles, such as JLSP-BC15, are deeply loved and trusted by the majority of users.

The surge protector, referred to as SPD, is installed on a 35MM standard rail. For fixed SPD surge protectors, the following steps should be followed for routine installation. First, determine the discharge current path. Second, are the wires marked for the extra voltage drop caused at the equipment terminals? Third, to avoid unnecessary inductive loops, the PE conductor of each device should be marked. Fourth, establish an equipotential connection between the equipment and the Surge protective device. Fifth, it is necessary to coordinate the energy of multi-level SPD. Precautions during installation: The most important thing during installation is the power-off operation. In addition, to limit the inductive coupling between the protected part and the unprotected equipment part after installation, certain measurements are required. Usually, we separate protected conductors from unprotected conductors, and also separate ground wires. Install according to the guide rail, and check whether the equipment can work normally after successful installation. As a well-known lightning protection brand in China, Anhui Jinli has been committed to the electrical safety of electrical systems and focused on lightning protection technology for electrical systems. For the installation of surge protectors, we provide detailed installation instructions with each product. If you encounter problems at the same time, the technical department can remotely guide the installation. At the same time, we will make regular return visits and repairs. Provide customers with worry-free after-sales service.

The application areas of SPD products include substation, substation, distribution room, switch box, and transformer type. Anhui Jinli's products are widely used in basic and emerging industries such as electric power, new energy, railways, rail transit, industrial automation, metallurgy, and the chemical industry. Substations, substations, switchyards, and divisions are common in railway systems. According to Shipping Letter [2017] No. 240, the Transportation Bureau of China Railway Corporation issued the "Implementation Plan for Optimizing the Settings of Surge Protectors in Traction Substations". Derived shielding cabinet products such as power supply surge protectors and signal surge protectors are used in Multiple locations; Power distribution rooms use surge protectors and intelligent collection terminal products in the PC segment and MCC segment of traditional industries; Box-type transformers are widely used in new energy wind power and photovoltaic industries. Low-voltage surge protectors, high-voltage metal oxide arresters, and intelligent collection devices are also widely used. Although the application environments and industries are different, with the rapid development of surge protector products in the direction of intelligence and digitalization, from fault trip remote signaling, and lightning counting, to peak detection, waveform recovery, life prediction, etc., lightning protection products have gradually been integrated into The booming digital wave.

From October 27 to 28, 2023, Anhui Jinli hosted the second lightning protection technology seminar with the theme of "New Energy Power Generation System + Traditional Distribution System Lightning Defense" in its park. In the compact seminar, The experts discussed the application of lightning protection in different industries and also proposed the direction of more detailed implementation plan research. The trip to Beijing, the capital, in November 2023 is a further extension of the application of lightning protection technology in various industries in the seminar. We discussed smart lightning protection system solutions with the rail transit field design institute; we discussed the installation and installation of lightning protection products with complete sets of customers. Selection; discussed typical lightning accidents at photovoltaic sites and new lightning protection solutions with the New Energy Field Design Institute. As a well-known lightning protection brand in China, Anhui Jinli has been committed to the electrical safety of electrical systems and focused on lightning protection technology for electrical systems. Overall lightning protection for the system is the most effective way to reduce personal injuries and equipment damage. Overall, lightning protection includes lightning protection products, engineering, and lightning protection detection, but also has developed new businesses such as lightning monitoring, ground resistance monitoring, and lightning early warning in recent years. From its establishment to the present, in the past 18 years, we have focused on the R&D, production, testing, and basic research of surge protectors and lightning protection-related products, we are user-centered, not only providing high-quality products that meet user needs but also helping users solve pain points in lightning protection.

Solar arrays are also electronic devices and therefore can be damaged by surges as well. Solar panels are particularly vulnerable to lightning strikes due to their large surface area and placement in exposed locations, such as on rooftops or the ground in open spaces. So it is very important to protect it from lightning or surge damage. To choose the appropriate surge protective devices model for your solar/photovoltaic system, the following points should be kept in mind: 1. Lightning circular flash density; 2. The operating temperature of the system; 3. System voltage; 4. The rated short-circuit current of the system; 5. The waveform level to be protected. 6. Nominal discharge current. Since its establishment in 2006, Jinli Electric has been deeply involved in surge protectors for nearly two decades, adhering to the corporate mission of "creating the world's first lightning protection brand to protect users from lightning intrusion". The independently developed and produced photovoltaic surge protectors, lightning arresters, backup protectors, etc. are at the forefront of the industry in terms of quality and performance. Jinli Electric’s photovoltaic surge protectors System voltages are: 600v 800v 1000v 1500v Working temperature: -40C°~+85C° Waveforms include 10/350us 8/20us The nominal discharge current is 20KA. Can meet the requirements of most solar systems, thereby providing a safer, more stable, and more efficient operating environment for photovoltaic power plants.

Anhui Jinli Electrical Technology Co., Ltd. currently produces three types of low-voltage surge protectors: T1(Surge protectors) • This SPD device is installed on the line side of the main service entrance. • Type-1 SPD features 10/350 μs current wave for outdoor applications. • It protects against external surges caused by lightning strikes or due to switching of common capacitor banks. It is considered the first line of defense for your home or office. • Built-in alarm system indicates when equipment needs to be replaced based on its life cycle. It is also called a secondary lightning arrester. T2 (Surge protectors) • This SPD device is installed on the load side of the main service entrance. • T2 SPD is characterized by an 8/20 μs current wave. • Used to protect branch circuits or service entrances from residual lightning energy, surges due to motors, and other surges. •Its main function is to limit transient voltages and protect sensitive electronic devices and MP/Mc-based motherboards. • It is used in commercial and industrial applications. T3 (Surge protectors) Can be used to add extra protection to appliances already covered by Type 1 or Type 2 SPD. Recommended installation: Close to the equipment to be protected, especially if the cable length from the switch panel exceeds 10 meters. Jinli Electric has 17 years of experience in manufacturing surge protectors since its establishment in 2006. It has a wide range of SPD and complete certifications. Continue to make contributions to the lightning protection of enterprises.

  Anhui Jinli Electrical Technology Co., Ltd. successfully held the second lightning protection technology symposium in Hefei from October 27th to 28th, 2023, with a total of 86 enterprises and 118 representatives attending.   The seminar focused on the theme of "New Energy Power Generation System+Traditional Distribution System Lightning Protection" and explored the application of lightning protection in various industries under the background of "Clean Energy+Integrated Wind and Solar Storage and Charging". Mr. Yang Zhen, General Manager of Anhui Jinli Electrical Technology Co., Ltd. and General Manager of Anhui Jinli Lightning Protection Engineering Technology Co., Ltd started theopening speech of the meeting, andintroduced the company's overall lightning protection areas, including lightning protection products, lightning protection engineering, lightning protection testing, and emerging businesses such as lightning monitoring, ground resistance monitoring, and lightning warning. He emphasized the company's 18 year focus on the research and development, production, testing, and basic research of surge protectors and lightning protection related products, and stated thatJinliis committed to helping users solve problems in lightning protection.   During the seminar, technical experts from the R&D center of Sungrow and experts from the School of Electrical Engineering atXinan Jiaotong University were also invited to share their field experience and latest research results. The attending leaders and expert representatives also visited Jinli Electric's spd laboratory, high-voltage laboratory, and production workshop, and watched relevant test demonstrations. The sharing and visiting sessions provide opportunities for attendees to gain in-depth understanding and exchange ideas.   The successful holding of this seminar further demonstrates Anhui Jinli Electrical Technology Co., Ltd.'s professional ability and industry reputation in the field of lightning protection. The company continuously improves product quality, expands business areas, and strengthens cooperation with leading enterprises and experts to provide high-quality lightning protection solutions for the market. Jinli Electric will strive to become the world's best lightning protection brand and achieve greater success through continuous efforts.   Congratulations on the successful seminar! I hope Anhui Jinli Electrical Technology Co., Ltd. can continue to promote the innovation and development of lightning protection technology in the future, and make greater contributions to the progress of the industry!

With the rapid development of renewable energy, photovoltaic power stations have been widely used as a clean energy power generation method. The operation and maintenance management of photovoltaic power stations realizes functions such as operating data monitoring, fault monitoring and diagnosis, and on-site security management and control through the smart photovoltaic operation and maintenance management platform. However, intelligent monitoring in the lightning protection sector is still a blind spot in existing photovoltaic projects. Since photovoltaic power stations are exposed to a large area of the surrounding open outdoor environment, they face a greater risk of lightning strikes. Lightning strikes may not only cause equipment damage and economic losses due to the inability to connect to the grid for power generation but may also threaten the safety of power station operation and maintenance personnel, posing huge challenges to power station operation and maintenance. To cope with these challenges, Anhui Jinli proposed a "photovoltaic power station smart lightning protection system solution". This solution integrates key technologies such as SPD online monitoring, lightning early warning online monitoring, and grounding resistance online monitoring, aiming to provide photovoltaic power stations with comprehensive lightning protection measures and realize intelligent monitoring and management. The smart lightning protection system is a solution that integrates advanced technology and intelligent management methods. It aims to provide comprehensive lightning protection measures for photovoltaic power stations and provide non-periodic operation and maintenance guidance and suggestions to the site. The system monitors and analyzes equipment status, lightning activity, and grounding system conditions in real time through key technologies such as surge protector online monitoring, lightning early warning online monitoring, and grounding resistance online monitoring. Through intelligent algorithms and models, the system can predict the changing trend of lightning risks and the changing trend of the surge protector throughout its life, and send out early warning signals in time to help operators take necessary protective measures. By introducing smart lightning protection systems, photovoltaic power stations can improve their capabilities, reduce lightning strikes, reduce daily maintenance of lightning protection equipment, and ensure the safe operation and sustainable development of power stations. This intelligent lightning protection solution will provide a safer, more stable, and efficient operating environment for photovoltaic power plants.