USE OF GAS TURBINE TECHNOLOGIES FOR POWER SUPPLY OF THE OIL AND GAS COMPLEX

The features of power supply for oil and gas enterprises, the design, features of the operation of gas turbine plants, methods of organizing a power supply system with elements of its own generation are considered, an autonomous power system with the organization of a direct cur-rent link has been developed to ensure stable operation of gas turbine units operating in paral-lel.

РОБОТИЗОВАНА ВЕЛОПАРКОВКА МОДУЛЬНОГО ТИПУ З СИСТЕМОЮ АВТОНОМНОГО ЖИВЛЕННЯ

The research is devoted to the development of an automatic complex that is being transformed with an autonomous power system. . This problem is now the most urgent one because the bicycle has become one of the ultra-high-speed vehicles in a big city.In this work, the experimental design of an automated bicycle parking is considered: a gripping device that must capture the bicycle and hold it during transportation to the storage place inside the parking lot; a device for lifting and transporting, provides lifting and moving the vehicle during operation; place of direct storage of vehicles. Moving element - the automated operator’s boom is equipped with a surveillance camera so that so that the user has the opportunity to monitor the operation of the system personally on the screen of the control panel. To ensure ease of construction, the main part of the operator is made of aluminum, which gives a preference for lightness by 40%, in contrast to the Steel counterpart, while maintaining the same strength. It also makes it possible to use engines of lower power and lower weight, as a result of which the design is cheaper. During the development of automated bicycle parking, a module of the solar power station was added, this made it possible to ensure autonomous operation of the system. The developed design has several sizes, starting from the basic one level and ending with the maximum possible five levels, so the system capacity changes, from 120 to 600 seats. In addition to various types of bicycles, automated bicycle parking may include different variety of electric scooters of the proposed design and weight.The resulting design of an automated modular bicycle parking is higher than existing analogues, automated bicycle parking is higher by two times, and in saving space by three and a half times. Also, the modularity of the design is unique and has no analogues now. The use of alternative technologies allowed us to make the system autonomous and ecological, which allows us to place it both in the city center and in the forest conservation area or Ecopark

Techno-Economic Optimization Analysis of an Autonomous Photovoltaic Power System for a Shoreline Electrode Station of HVDC Link: Case Study of an Electrode Station on the Small Island of Stachtoroi for the Attica–Crete Interconnection

A lot of autonomous power systems have been designed and operated with different power levels and with special requirements for climatic conditions, availability, operation/maintenance cost, fuel consumption, environmental impacts, etc. In this paper a novel design of an autonomous power system with photovoltaic panels and electrochemical batteries for a shoreline electrode station is analyzed. This station will be constructed on the small island of Stachtoroi for the new high voltage direct current (HVDC) link of Attica–Crete in Greece. The general guidelines of the International Council on Large Electric Systems (CIGRE) and of the International Electrotechnical Committee (IEC) for the power system of lighting and auxiliary loads for these HVDC stations are supplied from the medium voltage or the low voltage distribution network, whereas they do not take into account the criticality of this interconnection, which will practically be the unique power facility of Crete island. The significance of Crete power system interconnection demands an increased reliability level for the power sources, similar to military installations and hospital surgeries. In this research a basic electrical installation design methodology is presented. First, the autonomous photovoltaic power system with the energy storage system (ESS) consisting of electrochemical batteries is preliminary designed according to the relative bibliography. The station power and energy consumption are analytically determined taking into consideration the daily temperature variation annually. Afterwards, a techno-economic optimization process based on a sensitivity analysis is formed modifying the size/power of photovoltaic panels (PVs), the type and the energy capacity of the batteries taking into consideration the operation cycle of PVs—batteries charge and discharge and the battery ageing based on the relationship between battery cycles—the depth of discharge, the daily solar variation per month, the installation cost of PVs and batteries, the respective maintenance cost, etc., while the reliability criteria of expected loss of load power and of load energy are satisfied. Using the proposed methodology the respective results are significantly improved in comparison with the preliminary autonomous power system design or the connection with the distribution power system.

Improving Reliability Indices of the Autonomous Power System of Crete Island Utilizing Extended Photovoltaic Installations

Renewable energy sources (RES) have significantly helped in meeting the electricity demand of Crete, with their share in the energy balance to account for about 25% of the annual electricity production for the past five years. The contribution of photovoltaics (PVs) has been especially significant for the past three years, offering 10% in the peak demand, during summertime. This paper investigates what the capacity credit would be, i.e., up to what extent increasing existing PV capacity by about 20% can be considered as certain, to avoid installing thermal power units. In order to do so, probabilistic techniques have been applied to quantify the load that the installed thermal units in the Cretan power system should be able to meet at any time. In addition, the effect of the additional PV capacity to power system’s reliability is evaluated, introducing a new reliability index and taking into account actual data, regarding the planned and unplanned thermal units’ maintenance. Two scenarios have been examined using actual hourly data for load demand, PV, and wind production from the island power system of Crete. In the first scenario, the calculations were carried out considering the operation of the Cretan power system in its current state, while in the second scenario it was assumed that the PV production has been increased by 20%. Furthermore, we examine how the maximum value of capacity credit can be achieved as the PV installations are extended. In this regard, there is an upper limit of the additional PV capacity that leads to the maximum value of capacity credit.