Autonomous variable-frequency power plant based on a dual-fed machine with a vector voltage control system

The share of diesel-generator sets (DGS) in Russia's electricity generation capacity is 12 GW, which is approximately 5% of the country's total electricity generation. In our country's small-scale energy sector, especially in regions that are not connected to centralized electricity supply, DGS are the primary sources of electricity. Research on the development of energy-efficient diesel-generator power plants is a current and relevant area in the small-scale energy sector. Diesel-generator power plants are widely used in various technological facilities, including in the maritime industry. To improve the efficiency of this type of power plant by reducing the consumption of hydrocarbon fuel in the production of electricity, a class of DGS with forced regulation of the rotational speed of the internal combustion engines has been developed. Such generator sets have an almost constant specific fuel consumption, even in partial load modes, which means they are highly energy-efficient. These power plants can be built from scratch or by upgrading existing power plants. Currently, most diesel power plants are constant-speed (classic) units with synchronous generators. However, there are alternative generator options available for these power plants, such as asynchronous generators. The advantage of an asynchronous machine with a squirrel-cage rotor is its simple design, mechanical strength, ability to operate at high speeds, and low cost. The use of asynchronous machines in electrical systems is usually associated with the motor mode due to the inability to generate reactive power independently. The use of modern semiconductor converters in autonomous power plants allows for the creation of autonomous generation systems based on asynchronous electric machines.