During the installation of the meter, due to the heavy tasks, improper installation technology may cause certain faults. The key points of the installation and power connection technology of the smart meter are analyzed, and further research is carried out in combination with the smart meter installation case of a certain power user, including meter installation technology and fault handling after installation, etc., to ensure that the smart meter becomes the key foundation for supporting the operation of the smart grid.Technical points for smart grid meter installation and power connection
Keywords: smart meter; smart grid; installation and power connection
Contents
1 Clarify the installation content
2 Understand the installation environment
3 Analyze the equipment structure
4 Communication protocol and technology selection
1 Clarify the installation content
Before the formal installation work, the relevant personnel should fully understand the specific content of the installation work and formulate a reasonable installation plan based on the actual situation and the installation requirements of the smart meter. Specifically, the bottom of the smart meter should be kept at a distance of 1m to 1.4m from the ground. If the smart meter is installed in an open manner, the distance from the ground can be appropriately lowered to about 1.2m. At the same time, it should be ensured that the distance between the bottom of the universal meter and the ground exceeds the distance between the smart meter and the ground, and the best control is about 1.8m, which is convenient for the connection, installation and maintenance of the smart meter. According to the differences in the power boxes of smart meters, they should be designed separately during installation. For example, if the meter box is suspended, it should have a base height of more than 1.8m; and if it is horizontally installed, it should have a base height of more than 1.5m. If multiple smart meters are installed vertically, the interval between each meter should be more than 60mm.
2 Master the installation environment
The installation and power connection environment is the key to the effectiveness of smart meter installation and use. Relevant installation personnel are required to collect and measure environmental data, including ambient temperature and humidity, to avoid installation in high temperature environments or near dusty areas; at the same time, avoid the presence of flammable and explosive items at the installation site. Combined with the general operating environment of smart meters, the temperature is required to be controlled within 0℃~40℃. If there is a heating system around the meter, it is required to keep a distance of more than 0.6m between the two to avoid the meter being affected by the overheated environment and causing malfunctions. In addition, avoid installing smart meters outdoors as much as possible.
3 Analyze the equipment structure
It is a key technical point in the installation process of smart meters to clarify the configuration parameters and structure of meters and collectors. Specifically, this is because the operation and application of smart meters in smart grids have three different types of data collection methods, so the corresponding configuration quantity of collectors is required to be compatible. Therefore, analyzing the data collection method of meters and reasonably selecting collectors are the key to ensuring the normal application of smart meters.
4 Communication protocols and technology selection
In smart grids, commonly used communication protocols include DL/T645-1997, DL/T698.45-2005, DLMS/COSEM, etc. DL/T645-1997 is the most widely used and is suitable for communication between various electric energy meters and concentrators; DL/T698.45-2005 is an extended protocol based on the DLMS/COSEM protocol; DLMS/COSEM is an internationally common communication protocol for electric meters and concentrators. When selecting a communication protocol, comprehensive consideration should be given to factors such as the communication requirements of the system, compatibility of the equipment, and cost-effectiveness.
Commonly used communication technologies in smart grids include wired communication technology and wireless communication technology. Wired communication technologies include RS485, RS232, Ethernet, etc., and wireless communication technologies include GPRS, 3G, 4G, NB-IoT, etc. When selecting a communication technology, comprehensive consideration should be given to factors such as the coverage range, communication distance, and communication rate of the system to ensure that the actual needs of the system can be met. The communication security of the smart grid system is an important guarantee for the operation of the system and user privacy, mainly including data encryption, identity authentication, access control, etc. When selecting, communication technologies with higher security guarantees should be given priority.