In recent years, the technology of the photovoltaic industry has developed faster and faster, the power of a single module has become larger and larger, and the current of the string has become larger and larger, and the current of high-power modules has reached more than 17A. In terms of system design, the use of high-power components and reasonable over-provisioning can reduce the initial investment cost and kWh cost of the system. DC cables are installed outdoors. It is generally recommended to select photovoltaic special cables that have been cross-linked by irradiation. After high-energy electron beam irradiation, the molecular structure of the insulating layer material of the cable changes from linear to three-dimensional network molecular structure, which is resistant to temperature. The grade is increased from non-cross-linked 70°C to 90°C, 105°C, 125°C, 135°C, and even 150°C, which is 15-50% higher than the current carrying capacity of cables of the same specification, and can withstand severe temperature changes and chemical erosion. Used outdoors for over 25 years. When selecting the DC cable, it is necessary to select products with relevant certifications from regular manufacturers to ensure the needs of long-term outdoor use. The AC cable can be selected according to the maximum output current of the inverter. Because no matter how much the components are over-configured, the AC input current of the inverter will never exceed the maximum output current of the inverter. The circuit of the photovoltaic system is divided into a DC part and an AC part. The two parts of the circuit need to be wired separately. The DC part is connected to the components, and the AC part is connected to the grid. There are many DC cables in medium and large power stations. In order to facilitate future maintenance, the wire number of each cable should be firmly attached. Separate strong and weak wires. If there are signal wires, such as 485 communication, they should be routed separately to avoid interference. When routing the cables, prepare conduits and bridges, and try not to expose the cables. It will look better when the cables are routed horizontally and vertically. Try not to have cable joints in the threading pipes and bridges, because maintenance is inconvenient. If aluminum wires are used instead of copper wires, reliable copper-aluminum transfer terminals must be used.

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 SPD reliability include a. Manufacturers have improved MOV chip designs, using new materials and improved processes, to produce products with low failure rates and improved 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) of the SPD, and a reasonable derating can greatly reduce the failure rate of the SPD

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, it is conservatively estimated that it can 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. The actual application case has also been verified again. Only by achieving the collaborative integration and linkage optimization between efficient equipment can maximize the efficiency of equipment and systems and enable the power station to generate electricity vigorously throughout its life cycle.

Connecting to zero and concepts related to grounding Connect to zero: The neutral point of the generator and distribution transformer is called the zero point, and the line drawn from the neutral point is called the zero line. The metal shell of the electrical equipment is connected to the zero line, which is called zero connection. Working grounding: The neutral point of the power supply system transformer is directly grounded as working grounding. Working grounding can ensure the reliable operation of electrical equipment and reduce the contact voltage of human body. Protective grounding: Under normal working conditions of all electrical equipment, good grounding of non-charged metal parts is used as protective grounding, and protective grounding mainly protects the work safety of personnel. Repeated grounding: Repeated grounding is made by connecting multiple points on the neutral line to the ground multiple times. When the neutral point is directly grounded in the system, the voltage to ground can be reduced; when the neutral line is broken, the damage of the fault can be reduced. Static grounding: When equipment moves or objects move in pipelines, static electricity is generated due to friction, which accumulates on pipelines, containers and storage tanks or processing equipment, forming a high potential that is dangerous to personal safety and equipment and buildings. Static grounding is made, and once static electricity is generated, it is introduced into the ground to eliminate the possibility of its accumulation. A piece of conductive rubber that touches the ground at the rear of the tanker and the rear of the car belongs to electrostatic grounding. DC working grounding: Most computers and all microelectronic equipment use medium and large-scale integrated circuits, which have the same "potential" reference point, and connect the "zero" potential point of all equipment to the same grounding device, so that it can stabilize the circuit. Potential to prevent external interference. This grounding is called DC working grounding.

A few days ago, the Anhui Meteorological Bureau and the Provincial Development and Reform Commission jointly issued the "Fourteenth Five-Year Development Plan for Meteorological Services in Anhui Province." The plan proposes that during the "14th Five-Year Plan" period, the province's meteorological construction will focus on four items: meteorological monitoring, forecasting and early warning, the Yangtze River Delta integrated development of meteorological support service capacity building (Anhui), comprehensive management of rural lightning disasters, and the improvement of basic capabilities of meteorological stations. Key projects to further improve the level of social development of meteorological services. The comprehensive management project of rural lightning disasters will focus on the rural revitalization strategy and the defense of rural lightning disasters, upgrade and expand the original facilities and monitoring and early warning systems, and improve the monitoring and early warning capabilities of rural lightning disasters. In conjunction with the construction of beautiful villages, carry out the construction of lightning defense demonstration projects in provincial central villages, and improve the lightning protection facilities of various public lines and buildings (structures) in the villages with multiple lightning strikes, lightning disaster prevention facilities in public areas, and lightning safety shelters. Anhui Jinli Electric Technology Co., Ltd., the best innovative enterprise in the lightning protection industry in China, is located in Hefei, Anhui Province, an ancient city of science, education and culture. , Medium and low voltage overvoltage protection products. Through the nationwide sales and technical service network, we provide users with fast and personal services and create a safe and worry-free electricity environment.

In the lightning protection installation project of the Guangzhou-Shenzhen-Hong Kong Railway that has just been finished, our employees have overcome various difficulties, are not afraid of hardship and tiredness, and have worked overtime to complete the task on time, ensuring the normal operation of the railway system, which has won unanimous praise from the railway company.

By the end of august 2021, some of the biggest distributed inverter companies such as Sungrow Power, Growatt, Ginlang Tech, Huawei and Goodway made statements ahout the high-current string inverter. These statements show that kind of inverter which applied in distributed scenarios have been fully marketed. We will speed up the distributed photovoltaic projects to reduce the cost of electricity by using the the ultra-high-power modules, build the whole brand new ultra-high-power distributed ecology to make the system more stability and generate more power. With the advent of the era of affordable photovoltaics, the investment yield of new projects has become more challenging. Therefore, it is imperative to reduce the cost of photovoltaic systems and increase power generation. Right now, a total of 15 inverter manufacturers have distributed inverters matching 210 high-power modules in supply. Anhui Jinli Electrics, the leading lightning protection solutions provider in the photovoltaic industry, will continuously contribute to the realization of ‘carbon peak and carbon neutrality’ and jointly build a community of human and natural life.

  Since the National Fourteenth Five-Year Plan, with the gradual advancement of the dual carbon goals, the transformation of the energy structure has been the decisive factor in the short and medium-term decarbonization process. The total installed capacity and power generation of clean power represented by wind power and photovoltaic have been increasing year by year. The change in the amount of new energy power generation will completely change the traditional power system's "source with load" power production method.   The volatility and intermittentness of new energy electric energy production is one of the urgent problems to be solved. When the power grid cannot guarantee sufficient adjustment capacity, the safety of electric power supply will face severe challenges. Therefore, relevant national departments and local governments have strengthened the deployment of new energy storage development goals, industrial layout, and policy mechanisms to comprehensively promote the development of "wind power + energy storage". Now, energy storage solutions for all scenarios of wind power have been widely used and recognized in scenarios such as assisting wind power grid connection, power frequency and peak regulation, and demand-side response.   Adapting measures to local conditions, scientific design, efficient utilization, and grid balance are key technologies for wind farms to configure energy storage systems, and they are also the high-quality development requirements for wind power in the process of achieving carbon neutrality. Under the goal of "carbon peak" in 2030, Sungrow will continue to promote wind storage integration innovation, fully lead the development and innovation of wind power conversion technology, and strive to become a world-class supplier of wind power technology and equipment, and continue to provide customers with more wind power value-added services. Hot tags: solar surge protection device, solar spd, dc spd 1000v, dc spd 600v, dc solar spd, solar surge protector, solar surge protector device, dc surge protector device