Liang Ying, chief engineer of the Electric Power Research Institute of China Electric Power Research Institute, talked about the intelligent power distribution on the theme of “The development trend and prospects of the distribution network in the era of smart grid†on the sixth issue of “Energy Lecture Hall†held recently. The network's development practices and technology prospects, and shared the ten key technologies to support and achieve the development goals of smart distribution networks. Among them, intelligent power distribution equipment technology as a key hardware technology plays a fundamental role in determining the smart grid.
Safe, reliable, cost-effective, flexible and interactive, and environmental protection are the development goals of smart distribution networks. The development of intelligent distribution network requires ten key technologies, including active distribution network planning technology, intelligent power distribution equipment technology, communication and information support technology, smart distribution network self-healing control technology, intelligent distribution network energy scheduling technology, intelligent matching Grid energy efficiency management technology, intelligent distribution network interactive service technology, distribution network digital-analog simulation technology, distributed power grid-connected and micro-grid technology, and electric vehicle charging and discharging technology.
In smart distribution networks, equipment is a critical hardware facility. Intelligent equipment technology is mainly applied to power equipment, so that the equipment has the functions of state perception and information transmission, such as intelligent state sensors and intelligent electronic transformers. The design of intelligent power distribution equipment should be integrated, with the characteristics of reliable performance, modular function and standardized interface. Therefore, intelligent power distribution equipment is an integrated equipment integrating collection, control and protection.
The national "12th Five-Year" smart grid special plan pointed out that the future construction of smart grid will focus on the high level of integration of modern advanced technology, comprehensively improve the intelligent level of large-scale power grid operation control, and the ability and level of power supply services, thus ultimately achieving The leap-forward development of China's power grid. In terms of equipment investment, in addition to UHV-based primary equipment, smart grid construction will fully turn to six aspects of grid intelligence, including power generation, intelligent transmission, intelligent substation, smart distribution network, smart power and Intelligent scheduling. According to statistics, by 2020, including grid access, flexible transmission, power grid monitoring, intelligent substation, smart meter, charging station / pile and other equipment, the market capacity of equipment brought by intelligent grid will exceed 620 billion yuan.
Specifically, in the construction of each link, it means that the power generation needs to pass the device, the intelligentization of the power grid or the large-capacity grid energy storage, and improve the power generation access of new energy, especially clean energy. Intelligent power transmission should use flexible power transmission and transformation technology to improve the transmission flexibility, transmission efficiency and transmission capacity of the transmission system. Intelligent substations should adopt advanced, reliable, integrated and environmentally-friendly intelligent equipment to realize the digitization of the whole station information, the communication platform network, and the information sharing standardization. Intelligent power distribution should be built into a system of distribution automation and distribution network regulation and integration, intelligent technology support, to achieve flexible access and safe operation of the micro-grid. Intelligent power consumption and scheduling is to intelligently control and control power through the interaction and processing of information to realize the scientific management of electric energy.
Around these goals, equipment manufacturers in power electronics, new energy development, security monitoring and other industries are following the progress of the national smart grid construction, and gradually develop suitable new products in accordance with the requirements of the domestic smart grid, and strive to combine power. The actual application requirements of the system provide powerful technical support for the smart grid construction blueprint with innovative products.
Take the SBS-63/SBS-250 series dual power automatic switching device developed by Boer Power as an example. The design of SBS series products is based on the high reliability circuit breaker products of the company's Seidhan company. The electric drive mechanical switching device with mechanical locking function controls the automatic switching of the new generation of CB-class power conversion device through the intelligent control unit. In addition, SBS series products have electrical and mechanical double locking function, which can ensure the safety and reliability of important load power. SBS series products can be widely used in high-reliability requirements and important power-consuming places for mutual investment between two-way mains, mains and emergency power. In terms of design, based on the grasp of customer needs, SBS pays more attention to the research and development of details. The designers have carefully built up the structure, production process and appearance.
In Liang Ying's view, the research and construction of the energy Internet begins with the distribution of the electric terminal. Therefore, the development prospect of the smart distribution network is the energy Internet. In the future, self-healing and interaction will be the hallmark of grid intelligence. At that time, large-scale distributed power generation will be integrated into the power grid, and distributed power and micro-grid will also be applied on a large scale. This requires smart distribution networks to achieve self-healing, autonomy and self-organization of the micro-network through decentralized intelligent coordination. To enable distributed power generation to be fully integrated into the smart grid through the microgrid. This will become one of the working modes of the distribution network, and will eventually realize large-scale commercialization and market operation, forming a new business model.
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