By constructing bigger and bigger Data Centres (DCs), systems that make them become more complex. That leads to the requirement for the one common monitoring and management system that will monitor and manage functionalities for every individual element of the systems. In this paper, an overview of the systems that are implemented in tier 5 DC-s is given. Also, the roles of the systems are described. Special emphasis is on their own renewable energy sources (RES) and distribution switchgears that connect sources with Power System (PS) and DC. For quality monitoring of individual system elements parameter values and system in general, as well as the whole DC, it's necessary to design a unique database that contains information about defined parameter measurements. To make such database works, it is necessary to implement hardware that contains servers and data storage systems as the foundation on which a virtual platform is built. From all important elements of the systems, information is sent to centralized data base using a computer network. The system elements should contain network cards or controllers which role is to send measured values of the defined parameters to the main building in the format of Internet Protocol (IP) packets. In a suitable format, the data is displayed on the monitoring system. The same data are sent to the management system that manages the elements based on measured parameter values. This paper contains a proposition for the extension of existing monitoring and management system functionalities to the RES and distribution switchgear elements (DSE). Examples of practical usage of one non-commercial monitoring and management system are also given in the paper.

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Telecommunications and computer equipment centralisation trends for the purpose of achieving economic benefits, usage of technological innovations and new technical solutions implementation leads to the requirements for building bigger Data Centres (DCs). An increase in the size of the DC facility i.e. the number of racks inside occupied with equipment and the number of devices that enables the proper functioning of that equipment leads to necessarily power energy requirements increasing for power supply. For the DCs that require a large amount of energy, the building of their own, usually renewable energy sources (RES) is cost-effective. In such a caser, RES are primary and Power System (PS) is secondary and redundant power source. A concept of a DC primary powered from RES is presented in this paper. Generated electrical energy in RES is transmitted in PS through high voltage switch-gears (SGs) while DC is power supplied from PS through low voltage, medium voltage and high voltage SG-s. For the purpose of realisation of such facility, it is necessary to enable adequate conditions related to geographical location, physical access to the facility, possibility of connecting to the PS and possibility of connecting to the telecommunications centres. Based on carried out researches related to RESs potential, available roads, power supply infrastructure and telecommunication infrastructure, development conditions for DC on location near to Belgrade, close to power transformer station „Belgrade 20“ are analysed in this paper. From the aspect of DC power supply, proposed solution includes wind farm, solar plant and landfill gas power plant, as well as related SGs. Telecommunication connections from DC to the PS and other important telecommunication centres are provided. These connections are realised through optical cables placed next to the electrical lines and cables, and, when that is not possible, placed independently in the ground. The design of the DC interior is given and calculations of the required electrical energy for the power supply of the equipment and devices in the facility are performed. Based on calculation results, capacity calculation of the RES and calculation of SGs are performed. Design of the interior optical connections inside DC is also given. A General assessment of the investment and economics of building such DC are given at the end of the paper.

Large Data Centers (DCs) needs significant energy that enables uninterruptible and quality power supply for equipment and devices in the building. Connection between DC and Power System (PS) is realized through substations (SSs). Good design of SSs and connections between them, proper equipment dimensioning as well as enabling supervisioning and management of equipment in SSs are basis for achieving high reliability and redundancy in electrical energy power supply. The paper is divided in three parts. In the first part is given a proposal for SSs realization for different voltage levels. There are described components and devices of which SSs are composed and connections between them. Second part refers to protection systems for transformers, busbars and power lines. Special emphasis is on supervision and management for SSs equipment and systems that are described in the third part of paper. In the electrical power part the proposal for a 2N + 1 design of the redundant power supply for DC from PS is given. Challenge for protection system is to enable switch-off one or a few in the many transformers in the case of failure so that on all voltage levels, remaining transformers stay functional without interruption. Functional transformers equally take over the power load of one or more transformers that are in malfunction and turn off from busbars. In the case when one busbar or a busbar system is in fault, it is necessary to enable uninterruptible power supply of the DC through functional busbar systems. Substations equipment is connected to centralized supervisory and management system (SMS) realized according to IEC 61850 standard and Transmission Control Protocol / Internet Protocol (TCP/IP) architecture. The paper provides a brief view of protocols in IEC 61850 standard and TCP/IP stack that are used in the SMS design. A vision of future automation development and application of artificial intelligence in SSs is presented at the end of the paper.