In recent years, driven by the awareness of green energy conservation, smart grids with smart meters as the core have become a key area for the development of many countries in Europe, America, Japan and China. For example, the European Commission mandated that all European Union member states' electricity meters be replaced with smart meters by 2022. The United States also plans to install smart meters in every home. China also began to propose the idea of ​​building a strong smart grid in May 2009, preparing to invest up to 4 trillion yuan. After planning the current pilot and the comprehensive construction phase starting in 2011, China will basically realize its vision by 2020. Driven by this, grid technology is facing an important revolution, not just a simple technological evolution.
Table 1: A simple comparison between a traditional grid and a new smart grid.
In the smart grid, smart meters play a key role in enabling interaction between users and the power system. For example, on the one hand, it helps electric power institutions to accurately understand the user's electricity consumption rules, and set differentiated electricity prices for peak electricity or low-grid electricity. On the other hand, users can also rationally adjust their electricity consumption plans to optimize electricity tariffs. In terms of functional modules, smart meters, in addition to power and metering modules, also involve data storage functions, which require safe and reliable memory. In addition, two-way real-time communication is an important feature of smart grids, so communication modules are essential and need to be selected. The right communication method and the corresponding zui good solution.
In fact, the smart grid is a large system involving multiple layers of power, communication and applications, as well as different network types such as local area networks (LANs) and wide area networks (WANs). Among them, the LAN connects different types of smart meters in the home or building to the data concentrator. As far as the network connection of this segment is concerned, usually they have low requirements on the communication rate. The main consideration of Zui is to reduce the cost. Common communication methods include wireless radio frequency network, or wired power line carrier (PLC) or power line broadband (BPL). )Wait. The specific communication method needs to consider the actual conditions of the power grids of various countries, and the practice of first piloting the country will also provide reference.
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