Choose the suitable PLC modem scheme for the intelligent meter

In recent years, driven by the awareness of green energy conservation, smart grid with smart meters as the core has become a key area for the development of many countries in Europe, America and Japan For example, the European Commission has mandated that meters in all EU Member States be replaced with smart meters by 2022 The United States also plans to install smart meters in every home China also put forward the idea of building a strong smart grid in May 2009, and plans to invest up to 4 trillion yuan After the current pilot and comprehensive construction started in 2011, China plans to basically realize the idea by 2020 Driven by this, power grid technology is facing an important revolution, not just a simple technological evolution Table 1: simple comparison between traditional grid and new smart grid In the smart grid, smart meters play a key role in enabling users to interact with the power system For example, on the one hand, it helps power institutions to understand the electricity consumption rules of users and set differentiated electricity prices for peak or low-level electricity consumption; on the other hand, users can also reasonably adjust their own electricity consumption plans to optimize electricity expenditure From the perspective of functional modules, in addition to power supply and metering modules, smart meters also involve data storage function, which requires safe and reliable memory; in addition, bidirectional real-time communication is an important feature of smart grid, so communication module is very important, and appropriate communication mode and corresponding Zui preferred solution need to be selected In fact, smart grid is a huge system, involving multiple levels of power, communication and application, as well as different network types such as local area network (LAN) and wide area network (WAN) LAN connects different types of smart meters in a home or building to a data concentrator As far as the network connection of this section is concerned, usually they do not have high requirements for communication speed The main consideration of Zui is to reduce the cost The common communication methods include radio frequency network, or wired power line carrier (PLC) or power line broadband (BPL), etc It is necessary to consider the actual situation of power grids in various countries and other factors to determine which communication mode to adopt At the same time, the practice of testing countries first will also provide reference.