State parameters interconnections of power system including a high frequency synchronous generator with an asynchonous tie

The last progresses in power mechanical engineering and power electronics had permitted to construct gas turbine power units (GTPU) with high frequency synchronous generators (HFSG) and static frequency converters (SFC) operating as asynchronous tie (AT). Such GTPU has a number of advantages over conventional one: 1) does not have a reduction gear between turbine and generator shafts; 2) gives an opportunity to minimize weight and dimensions of a turboset and power plant as a whole; 3) permits to optimize turbine's modes by means of it's rotation speed control; 4) gives additional opportunities of GTPU states control and required power quality support with the help of SFC control; 5) owing to this control, allows to improve operating speed of states control and the unit protection. These features make AT GTPUs of great practical interest, so that a considerable number of power stations with such units is planned to put into operation in Russia in the nearest future. Mention that they are designed to operate both in parallel with the power system and autonomous supplying a local load. The most attractive field of AT GTPU's application is power supply of distantregions and areas difficult of access.