The development of the national wind power industry in Ukraine faces a number of problems because of the lack of sufficient information on the peculiarities of the operating modes of wind farms under real-life conditions. This applies to wind load indices in different regions, estimates of the performance of wind power plants with different types of wind turbines. One of the important characteristics of the potential capabilities of a wind power plant in the grid is the time and rate of utilization of installed capacity (installed capacity utilization factor -ICUF), which are widely used in the design of power plants. The paper presents the results of calculating the characteristics of the production potential of wind power plants with generators of different types and capacities, which are defined in terms of time and coefficient of utilization of the installed capacity. It is shown that such characteristics of the wind power station uniquely characterize the efficiency of the application of a specific wind generator in real conditions for use in design calculations.Keywords: wind turbine; wind station; time of use of installed capacity; coefficient of utilization of installed capacity. Definition of a scientific problemThe current state of the world renewable energy is characterized by high dynamics of development. Significant features of this are many confirmed facts. In recent years, increased participation of renewable sources in the balance of electricity generation in the world's electricity systems continues. [1]. On 21 04 2017 a national energy company in the UK said that it can confirm that for the past 24 hours it supplied GB's electricity demand without the need for coal generation [2]. It happened for the first time since 1880. A similar situation occurs periodically in other countries. The State Energy Operator of the People's Republic of China said that according to the results of 2016, an indicator of 150 GW of power at wind farms was reached [3]. In addition, it should be noted the results of research on the prospects for the development of renewable energy in 139 countries [4] on the model of the world's energy, proving the possibility to transition to exclusively renewable energy sources by 2050. The above facts confirm once again that alternative renewable power, in particular wind energy, loses its alternating nature and becomes an important basic component of world electricity generation at the level of coal, atomic and oil and gas energy.Wind and generally renewable energy in Ukraine is developing at a different pace, which is primarily due to the effects of crisis phenomena. In 2016, the installed capacity of Ukrainian wind farms amounted to 525 MW in the production of 925 thousand MWh and the share of 49 % of the capacity of alternative and renewable sources [5]. The need for wind energy development in Ukraine is determined by the need to reduce the dependence on traditional types of fuel and its imports, reducing harmful emissions into the atmosphere, which can be solved by the ...

The use of extra-high voltage networks leads to a number of problems with compensation for excess reactive power. An option to avoid these problems is to apply asynchronized synchronous turbine generators, which have a number of advantages over traditional synchronous generators. These advantages are largely manifested under conditions of generator operation in power grids with excess reactive power. Typical examples of such power grids are power grid "Burshtyn Island" and "Power bridge "Ukraine-EU". The article presents the results of mathematical modelling of the steady-state modes for "Power bridge "Ukraine-EU". The mode coordinates are determined under different conditions regarding reactive power particularly with using an asynchronized turbine generator in asynchronous as well as asynchronized modes. The results obtained prove the feasibility and effectiveness of the proposed technical solution.

The widespread applying of electrical grids with voltage classes 330 and 750 kV with powerful units of nuclear and heat power plants creates a set of problems with normal modes ensuring in the Ukrainian energy system. Due to sufficiently great transverse capacitance of such overhead lines, significant amounts of reactive power excess are possible in the system. This phenomenon manifests itself especially in the load reduction hours in the power system through the visible voltage levels deviation at the energy-generating nodes in an upward direction. The application of asynchronized turbogenerators with the ability to work in asynchronous mode could solve the problem of reactive power excesses in the energy-generating nodes during load reduction hours in the power system due to their possibility of deep reactive power consumption. The paper presents the calculated results of the asynchronous modes coordinates for an asynchronized turbogenerator with a capacity 1000 MW based on the parameters of the equivalent circuit, taking into account possible generator stator voltage deviations within ±10%. The influence of voltage deviations on the asynchronous modes coordinates is shown. Due to the obtained characteristics, it is possible to perform engineering estimations of the possible asynchronous mode applying for the asynchronized generator under conditions of nuclear and thermal power plants and taking into account possible voltage deviations.

One of the problems of wind energy is determined insufficient information available about the effectiveness of wind farms in the real life conditions, due in particular to commercial issues of use. On the one hand it is associated with the wind loads in effective areas, on the other-lasting licensed wind parameters measurement with difficult access conditions. The paper estimates the economic efficiency of wind farm generators of different capacities. It is shown that in this way we can calculate the wind power parameters necessary for the preliminary analysis of the economic efficiency of-annual electricity production, profitability and return on investment. As a result, the estimation of costs for wind turbines and their installation and operation, profit margins and payback period were estimated. The high efficiency of wind power in terms of the Carpathian region of Ukraine provided detailed characteristics of wind turbine choice for real parameters of wind loads has been shown.