The rapid development of new energy provides an opportunity for the intelligent development of the low-voltage electrical industry. Low voltage electrical products are expanding to fields such as photovoltaic power generation inverters, new energy control and protection systems, distributed energy, energy storage equipment, DC switchgear, and can provide overall solutions. This field is a new important economic growth point for the low-voltage electrical industry Nan Yin, Chairman of Beijing People's Electric Appliance Factory Co., Ltd., stated in an interview with China Electric Power Daily at the 9th China Electrical Equipment Innovation and Development Forum held on June 21, 2014.
In large-scale photovoltaic grid connected power generation systems, low-voltage electrical appliances are required in all aspects, such as PLCs, reversible contactors, photovoltaic combiner boxes, AC distribution panels, transformers, and other equipment. Specifically, in order to reduce the number of connections between photovoltaic modules and inverters, facilitate maintenance, improve reliability, and reduce costs, DC combiner devices are generally added between photovoltaic modules and inverters.
New Energy Construction Brings Opportunities to Low Voltage Electrical Appliances
The application of distributed power generation technology can bring many benefits, but it is also accompanied by adverse effects such as randomness, intermittency, and difficulty in regulation. Therefore, it is often necessary to equip other regulation measures to assist. Renewable energy generation and efficient power generation based on fossil fuels will be widely applied in the power system, and this trend will lead to changes in the structure, operation, management, control methods, and other aspects of the power grid, as well as changes in the power storage system It will become a key equipment in the future power grid At the forum titled "Distributed Power Generation, Energy Storage, and Microgrid Technology and Equipment", Sun Changji, Chairman of the China Electrotechnical Society, said.
The construction of smart grids and the development of new energy have brought new opportunities to China's low-voltage electrical industry. At present, the smart grid has entered an important period of construction, and China's urbanization construction is rapidly progressing. The intelligent construction of urban and rural distribution networks will also be fully carried out. The smart grid, intelligent complete equipment, intelligent distribution, and control system will usher in a golden period of development. At the same time, a large number of new energy generation continues to grow, bringing opportunities and challenges to China's low-voltage electrical industry.
From a technical perspective, in the context of industrial structure adjustment and low-carbon economic development, the new generation of energy-saving, material saving, and high-performance low-voltage electrical products will have greater development, and market demand is becoming increasingly strong. This also provides a rare opportunity for the transformation and upgrading of the low-voltage electrical industry. At the same time, with the continuous development of low-voltage electrical production technology, a new generation of intelligent low-voltage electrical appliances characterized by intelligence, modularity, and communication will become the mainstream product in the market, and the market share of mid to high-end low-voltage electrical appliances will further expand.
Taking photovoltaic as an example, photovoltaic systems have put forward new requirements for low-voltage electrical appliances, such as high voltage, high protection, high altitude, large temperature difference, long service life, high reliability, etc. Manufacturing enterprises must improve low-voltage electrical appliances, improve material insulation level, improve shell fitting accuracy, reduce heating and temperature rise, select low-temperature resistant materials, improve material resistance to electrical wear, and strictly control from material selection, redundant design to process optimization, Optimize production, processing, and testing equipment, and gradually develop towards automation and intelligence Shanghai Liangxin Electric Appliance Co., Ltd. Chief Engineer Bu Haomin told China Electric Power News.
Transforming and upgrading towards intelligence and high-end
In recent years, China's low-voltage electrical industry has evolved from simple assembly, imitation manufacturing, to self-development and design. It has now developed into nearly 1000 series, with around 1500 production enterprises, and an annual output value of about 20 billion yuan. This is the era of the fourth generation of intelligent low-voltage electrical appliances. According to the direction of national policies, the structure of low-voltage electrical appliances needs to be further adjusted in the future. Products with outdated technology, large volume, high energy consumption, and environmental pollution will be eliminated. The low-voltage electrical appliance industry in China is showing a trend of further increasing concentration and upgrading from mid to low end to mid to high end.
According to incomplete statistics, over 80% of the electricity in the power system is transmitted to users through the user side distribution network and consumed by terminal electrical equipment. The user end covers all devices and systems that transmit, distribute, control, protect, and manage electrical energy from power transformers to electrical equipment, mainly including intelligent low-voltage appliances, intelligent meters, and intelligent building systems. As the core electrical equipment that plays a control and protection role in the user end, low-voltage electrical appliances are characterized by a large quantity and wide range, located at the bottom of the power grid energy chain, and are an important component of building a strong smart grid.
Therefore, in order to build a smart grid, it is first necessary to achieve the intelligence of low-voltage electrical appliances at the user end, which is the cornerstone of the grid. The intelligent distribution network at the user end constructed from this is an important foundation for forming a smart grid, and networked, comprehensive intelligent, and communicable low-voltage electrical appliances will be the mainstream development direction in the future.
The smart grid is designed to achieve energy substitution and compatible utilization. It requires the integration of data in the system and the optimization of system operation and management based on the creation of open systems and the establishment of shared information models. Intelligent low-voltage electrical appliances are the fundamental components of building a smart grid. "said Guan Ruiliang, Executive Vice General Manager of Changshu Switch Manufacturing Co., Ltd. For example, low-voltage intelligent circuit breakers must have protection, operation parameter measurement Maintenance, communication, and other functions. Intelligent low-voltage electrical appliances must meet the requirements of excellent performance, reliable operation, small product size, modular design, communication, energy conservation and environmental protection. They must have functions such as protection, monitoring, communication, self-diagnosis, display, etc., which are necessary for achieving intelligent power grid.