This master's thesis discusses the supervisory system that monitors the power supply and cooling conditions of a data center. The objective of the thesis is the successful implementation of an automation system that uses various communication protocols to collect data from devices. The data center is situated in a modular structure in the basement of a newly constructed building and ensures continuous operation of information and communication technology systems.
The thesis describes the key components of the center, including project requirements, spatial layout, classification of the data center according to the Tier standard, and an overview of equipment. It outlines the electrical power supply system, including the design of the uninterruptible power supply (UPS) with batteries, the backup power system with a diesel generator, and the power distribution network. The cooling system is also described, including cooling cabinets, rooftop dry coolers, and the separation of hot and cold aisles within the system area.
The core of the thesis focuses on the development and implementation of the data center’s supervisory system. The system consists of input-output control units, software, and a control console. The control units acquire the status of switches and circuit breakers in the power distribution blocks via digital inputs, along with liquid leakage sensors, door position sensors, and fire alarm signals. Analog inputs are used to read temperature and humidity sensor values in the system area. The UPS (Uninterruptible Power Supply) is integrated into the supervisory system using the BACnet/IP (Building Automation and Control Network / Internet Protocol) protocol. Power analyzers located outside the system room are integrated via Modbus RTU (RS485), and energy meters inside the system room via Modbus TCP/IP. The thesis describes the implementation of all integrations and the characteristics of each communication protocol. Control logic and the alarm system are explained in detail. A local control console, installed on the distribution cabinet door with the controller, provides quick access to system status. A more detailed overview is available on the building's central building management system (BMS), which also integrates other systems in the building. An SMS-based alarm notification system is implemented on the central platform. The development of user interfaces and the alarm system on the local supervisory platform is presented.
The operation of the data center supervisory system was verified through a series of commissioning tests, among which the key scenarios included the simulation of cooling and power outages under load. Based on these tests, the system's correct response and overall reliability were confirmed. From a functional perspective, the system meets the essential characteristics of a DCIM (Data Center Infrastructure Management) solution, as it provides centralized monitoring of power and cooling systems, integration of multiple communication protocols, real-time data visualization, and an alarm system with remote notification capabilities.
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