HVDC Volgograd–Donbass

The HVDC Volgograd -Donbass is a 475 km long, originally designed for 400 kV bipolar high -voltage direct current (HVDC ), which (and vice versa ) is used to transfer energy from hydroelectric power station Volgograd to Donbass basin. The HVDC Volgograd -Donbass is by the now disused HVDC " same project" of Kaschira to Moscow the second HVDC system, which was built in the former Soviet Union. The plant is now in poor condition and is operated with 100 kV.

Converter station Wolschskaja

The terminal of the hydroelectric plant Volgograd, the converter station Wolschskaja is located at on the embankment of the power plant! 548.8261115544.672222548 ° 49 ' 34 "N, 044 ° 40' 20" O48.82611111111144.672222222222. Each of the two poles is composed of series-connected three-phase four valve bridges, which form two series-connected twelve-pulse bridges. Originally, all valves of the system mercury arc rectifiers were designed for a voltage of 100 kV and a maximum current of 938 amperes. 1977, mercury arc rectifying a valve bridge were replaced by thyristors. The converter transformers the converter station Wolschskaja be fed directly from the generators of the Volgograd hydroelectric power station with 14- kV three-phase, two parallel generators depend on a transformer. In addition to the two secondary windings necessary for the realization of the twelve-pulse circuit, the converter transformers have a third secondary winding to feed the energy generated in the 220 ​​kV network.

The converter station has no harmonic filter. The total required for the operation of the inverter reactive power is supplied from the generators of the power station.

Line

The cable to the Donbass region has a length of 475 kilometers and is executed in its entire length as an overhead line. The supporting poles of the line have - like most poles of HVDC overhead lines - a traverse at the end of each one conductor cable is attached to a suspension insulator. There are two types of tension towers used namely lattice masts, similar in construction to the suspension towers and pole -like structures, which are supported by two diagonal braces and since they carry only one conductor cable, always in pairs next to each other.

Southwest of Kamennyy there is a section of the line, where designed for three conductor cables portal masts are used, although the line there as well - as in its entire length - has only two conductors.

Electrodes and electrode line

The HVDC Volgograd -Donbass can also be operated with single-pole return line on the ground, which is why two grounding electrodes exist. Both electrodes are country electrodes, which consist of a 30 mm thick steel rod inserted into a hole filled with coke.

The electrode lines are similar to those installed on the main pole, but which are smaller. In contrast to the main line all the credits poles of the electrode line are free-standing lattice towers with a crossbar. As supporting masts concrete poles are used with a single traverse of steel usually. Only for supporting masts of extraordinary height and lattice masts are used.

The electrode of the station Mikhaiilovskaja is located north of Smile. It is connected via a 32 km long overhead line with two parallel ACSR conductor cables with 2450 mm2 cross-section with the converter station Mikhaiilovskaja. The electrode line runs from Mikhailovskaja to Zolobok west of the main line. In Zolobok they pass under it and follows her on the other side to Krymske where it leaves off the main line and turns in a southeasterly direction to the electrode.

The electrode of the converter station Volgograd is located northwest of Kamennyy. It is connected to the converter station is a 24 km long overhead line with two parallel ACSR conductor cables with 2450 mm2 cross-section.

Converter station Michailowskaja

The converter station in the Donbass region, the converter station Michailowskaja, is located northeast of Perwomajsk in the Ukrainian province of Luhansk by! 548.6536115538.565556548 ° 39 ' 13 " N, 038 ° 33' 56 " O48.65361111111138.565555555556. Series-connected three-phase bridge are used as valve in the converter station Wolschskaja for each pole 4, which form two series-connected twelve-pulse bridges. In this station, the mercury arc rectifying a valve bridge in 1977 replaced by thyristors. It is noteworthy that the DC power line crosses the entire three-phase switchgear, before it reaches the location on the southern side of the unit converter hall. The converter hall itself is 219 meters long and has a 54-meter wing, which shows in südsüdwestliche direction. The valves of the converter station Michailowskaja are connected via the converter transformers to 220 kV level. The station has three harmonic filter, the 100 meters north of the switchgear are located and each providing a reactive power of 132 MVA.