1. Overview
The Beijing Winter Olympics will be grandly opened on February 4, 2022. This is a major landmark event at an important historical node in my country. It is an important opportunity to show the country's image, develop the country and inspire the national spirit. As the grand event draws nearer, as an important basic condition for hosting the Olympic Games, the construction of the venues for the Beijing Winter Olympics has always attracted much attention, and the stable and reliable operation of the power supply and distribution system of the venues is the top priority.The outdoor environment of the site is relatively harsh, and the temperature is as low as minus 20 °C. In order to ensure reliable power supply, each headquarters conducts power supply support capability tests according to the power supply duties, and tests the power supply tasks, main power supply and self-provided emergency power supply of each venue. Supply situation, operation of important loads, relay protection action, emergency response plan, spare parts, logistics support, etc. Acrel Electric provides solutions for intelligent monitoring of distribution boxes and environmental regulation in boxes for the Winter Olympics, and conducts online real-time management of power supply and power protection equipment such as cable branch boxes, ATS power boxes, and UPS power boxes. The edge computing gateway collects the electrical data, temperature and humidity, condensation, contact temperature and other data inside the indoor and outdoor power distribution cabinets and automatically adjusts them to achieve good operating conditions, realizing intelligent monitoring from the UPS to the low-voltage switch at the end of the venue for the Winter Olympics , to provide emergency support in a timely manner and improve the reliability of power supply. 
2.System structure
The system can be divided into three layers: the field device layer, the network communication layer and the platform management layer.Field device layer: including DTSD1352-4S2D-MK, DTSD1352-4S2D,ARTM-24,WHD46-33-C,WHD20R-22-C, ARTU-KJ8 and other signal acquisition equipment, used to collect electrical operation in indoor and outdoor distribution boxes Parameters, electrical contact temperature, ambient temperature and humidity in the box, condensation, smoke and other data, and can be automatically controlled by the built-in logic of the ANet-2E4SM intelligent gateway to adjust the temperature and humidity to maintain a good operating environment inside the distribution box.Network communication layer: including ANet-2E4SM intelligent gateway. The gateway actively collects the data of the field device layer equipment, and can perform protocol conversion, data storage, and upload the data to the local touch screen and the designated server port through the 4G network. Temperature and humidity control equipment. Platform management: a large platform for energy management in the Winter Olympics. 
3.Solution
The site mainly monitors and controls three types of distribution boxes, including cable branch boxes, ATS power supply automatic switching boxes and UPS power supply boxes, to ensure stable and normal operation of distribution boxes in severe cold environments. There are more than 500 distribution boxes of these three types included in remote monitoring, and the solutions for different distribution boxes are also slightly different.3.1Configure Device Inventory
3.2 Implement function
Monitor the electrical parameters of the branch box circuit.When the temperature in the box is too low, push the alarm signal and start the heating.Cable connector over temperature alarm.Condensation detected to start heating and ventilation smoke alarm Socket power supply status detection.Adopt IEC60870-5-104 protocol to upload to Winter Olympic venue energy management platform through APN directional network.
3.3 Configure Device Inventory 
3.4 Implement function
When the temperature in the box is too low, push the alarm signal and start the heating Cable connector temperature collection, over temperature alarm.Condensation alarm is detected and heating ventilation is activated Smoke and temperature and humidity alarms.Adopt IEC60870-5-104 protocol to upload to Winter Olympic venue energy management platform through APN directional network
3.5Configure Device Inventory 
3.6 Implement function
When the temperature in the box is too low, push the alarm signal and start the heating Internal over temperature alarm Condensation heating Battery pack abnormal alarm Inverter failure alarm.Adopt IEC60870-5-104 protocol to upload to Winter Olympic venue energy management platform through APN directional network
4. On-site maintenance
The opening of the Winter Olympics is imminent. In order to ensure the normal operation of the on-site power distribution system, Acrel arranged for engineers to maintain on-site and provide technical support for winning the tough battle of power protection for the 2022 Beijing Winter Olympics.Acrel has been deeply involved in intelligent power distribution for many years, and currently more than 14,000 solutions are running all over the country. The company has accumulated a lot of experience from terminal sensors, edge computing gateways to cloud platforms, and provides data support and solutions for weak links in power distribution systems in various environments to improve power supply reliability. Acrel will help this time with practical actions. The Winter Olympics were a complete success. 
