local 220 kV grid. The station has no harmonic filters. All required reactive power is delivered from the generators of the power plant. Mikhailovska converter station The converter station in Donbas area, the Mikhailovska converter station, is situated northeast of Pervomaisk, Luhansk Oblast at . Similarly to Volzhskaya converter station, each pole uses four series connected three-phase valve bridges, which form two series connected twelve pulse bridges. As at Volzhskaya converter station one mercury arc valve group was replaced in 1977 by a thyristor valve group. The valves of Mikhailovska converter station are connected through the converter transformers to the local 220 kV grid. Unusually, the DC line crosses the whole AC switchyard of the substation before it enters the valve hall situated at the southern side of the station. The hall is long and has a long wing pointing in south-southwesterly direction. The Mikhailovskaya converter station has three harmonic filters, each with a reactive power of 132 MVA, which are situated northerly of the AC switchyard. Powerline The powerline to Donbas area has a length of and the entire length is overhead line. The suspension towers have a single crossbar, carrying one conductor on a suspension insulator at each end of it. Two types of strainers are used: lattice towers similar to the suspension towers, but equipped with strainer insulators and of stronger design and much more often pole-type towers with a central pole supported by two diagonal bars. The latter towers carry only one conductor, and there are always 2 such towers close together. South of Solinky at , there is an unusual double pylon in the line, at which one conductor is fixed at suspension insulators, while the other is fixed with strainer insulators. The exact use of this pylon is unknown. It may carry equipment for extracting PLC-signals from the line, which may be used by Solinky 110 kV substation approximately 1 kilometres northward. Southwest of Kamennyy between and the line is installed on portal pylons designed for 3 conductors, although the line has there as in all other sections just 2 conductors. The conductors consist of bundles of 2 ACSR-conductors with 600 mm2 cross section. The whole line is equipped with a single ground wire. It is a single ACSR-wire with 70 mm2 cross section and fixed on the pinnacles of the pylons. The line leaves Mikhailkovskaya converter station in north-northeast direction. Southeast of Onkhove