Smart grid is a complete system, covering power generation, transmission and distribution, dispatching, transformation, electricity consumption and other aspects. According to incomplete statistics, more than 80% of the electric energy of the power system is transmitted to users through the user-side distribution network and consumed by terminal power equipment. As the control and protection of terminal electrical equipment, low-voltage appliances, which are at the bottom of the power grid energy chain, are an important part of building a strong smart grid. Therefore, the construction of smart power grid and user-side intelligent distribution network will make networking, integrated intelligence and communication become the possible direction of the future development of low-voltage appliances.
Unified platforms and standards are beneficial to the development of intelligent low-voltage appliances
Smart grid requires the client to use unified and standardized products, which makes all kinds of automation system, monitoring system, management system and on-line monitoring device of measuring, protection, control, and other functions gradually in the new unified, standardized technical support system integration and integration, and finally realize the fusion of various technologies. Thus, it can improve the reliability of smart grid system and shorten the installation and maintenance time. This has also brought great convenience to the development and application of a new generation of intelligent low-voltage appliances.
Traditional intelligent low-voltage electrical appliances are facing extension and expansion
Efficient use of renewable energy, renewable energy generation systems developed by cutting peaks and valleys, improved power efficiency, and quick charging devices for electric vehicles and other electric devices require the development of specific functional and performance requirements for these systems.
On the other hand, the application of these equipment (such as converter equipment, grid-connected equipment, intermittent energy access equipment, charging equipment, etc.) will also affect the power quality. With the suppression of harmonics, reactive power compensation, transient overvoltage and the suppression and protection of renewable energy power generation system, the low voltage electrical appliances are put forward higher and higher requirements. Traditional low-voltage electrical appliances will face extension and expansion, which is a new development opportunity for low-voltage electrical appliances.
Early warning, rapid recovery and self - healing are the development direction of low voltage electrical appliances
Smart grid should have the functions of robustness, self-healing, interaction and optimization. Low-voltage appliances should adopt network information technology, modern communication technology and measurement technology to achieve system life management, quick fault location, two-way communication, power quality monitoring and other functions. At the same time, low-voltage appliances will use the signal acquisition system in the intelligent distribution network to realize digitalization, which can not only ensure sufficient sampling rate and good accuracy, but also facilitate the early assessment of events and early warning of faults through real-time data analysis. In addition, low-voltage electrical network monitoring can quickly locate faults, isolate faults in the case of distribution network faults, automatically restore power supply in non-fault areas, and realize fast, safe recovery and self-repair of distribution network. Thus meet the requirements of network protection and control of intelligent power distribution. Therefore, with the construction of smart grid, a new generation of smart low-voltage appliances will be more and more widely used.
Supply and demand management mode promotes the development of low voltage electrical appliances to network
The application of renewable energy power generation system breaks the traditional mode of energy production and consumption and forms a two-way interactive service system between producers and consumers. Various input data, such as electricity price signal, time-sharing billing and power grid load, must be configured flexibly according to users' needs through advanced management software to promote users' participation in power grid operation management and balance users' demand for electricity.
In addition, to meet the relationship between supply and demand, reduce or transfer peak electricity demand, reduce hot spare power stations, further improve the energy saving effect of the power grid, improve the reliability of power supply of the power grid, so as to save resources and protect the environment to the greatest extent. This requires not only the development of new operational management models, but also support for the networking of low-voltage electrical products and systems to achieve two-way communication, two-way metering and energy management. Therefore, these requirements will also promote the rapid development of low-voltage electrical equipment in the direction of networking.