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Old 05-03-2016, 04:19 PM
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On Sunday, May 31, 1964, the last and the largest part of a boiler a 110- tone drum was lifted on 42-meter height. This working moment finished the assembling of the chief boiler equipment.
The first power block was ready to be launched before the fixed time in honor of the 40th anniversary of Moldavian SSR establishment and Communist Party of Moldavia formation. The assembling workers and builders nad finished all the works by September 20, 1964.

On September 26, 1964, at 3.30 p.m. the Chief of a power section, I.T. Nochka, and staff on duty made the synchronization of the generator and the South power system of the country. Moldavian HPS produced the first industrial current!

It was the most long-waited day for the assembling workers and builders, the day preceded by 800 days of intensive labour. In the greeting letter of Moldavian Communist Party Central Committee and MSSR Ministers Council there was marked the significant contribution of power builders:
"The great volume of works was performed for the short period. It was replaced more than 1.5 million cubic meters of soil, it was laid 85 thousands cubic meters of concrete and reinforced concrete, it was assembled more than 15 cubic meters of collapsible reinforced concrete and 1200 tones of metal elements, it was installed unique domestically produced equipment. Former vacant ground became a power station and a new comfortable settlement Dnestrovsk due to your industrious hands".

Many famous people of the state visited the builders of the station. A cosmonaut P.R. Popovich came among honorary guests in 1965. Having examined the station, the cosmonaut learnt that the first block had already produced 300 millions kWth of power and the assembling workers had promised to put two more power blocks into operation instead от one planed block. In the operator register of an assistant stationmaster the quest wrote: "Keep it ирг. Then Pavel Romanovich signed in the Book for honorary guests.

"I wish new success in labour, in mastering new equipment, and also good health to each member of the staff of Moldavian HPS".
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  #12  
Old 05-03-2016, 04:22 PM
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Default Main buildings and equipment

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Name:	Moldavian HPS.jpg
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Moldavian HPS, estuary view.

Moldavian HPS with the fixed power 2520 MW is situated on the west bank of the Kuchurgan estuary in the southeast of Moldavia.
Before the collapse of the Soviet Union Moldavian HPS supplied with electricity the consumers of Moldavia and south parts of Ukraine. The part of energy was given to Bulgaria. Nowadays the station supplies with power Republic Moldova and Transdniestria.
The chief buildings of the power station are: the main buildings of the 1 st - 4th rank of the dust-coal and gas-fuel oil part, and the 5th rank of the steam-gas-plant, the united subsidiary and service common buildings of the 1st - 4th rank, the common engineer building of the 5th rank, the fuel economy, the buildings of the system of technical water-supply and ash- slag removing, the nature protecting and electro technical buildings.

The main building of the 1st - 4th rank is a three-bay one: a machine room (45 m), a bunker deairator section (15 m), a boiler section (36 m), column spacing is 6 m.
The frame of the building is made of collapsible reinforced concrete, except the machine room girders made of metal.

The position of turbo unit in the machine room is transversal. The thermal scheme is block one, without cross-links among power blocks by acute steam and feeding water. The scheme of dust preparation is separate for each block with an intermediate dust bunker ond two ball mills.
Blowing ventilators and exhausters, two for each boiler, are placed on the open ground behind the main building.

For the machine room tending there were installed two cranes with carrying capacity 125/20 t/s, and two cranes with the capacity 50/10 t/s were installed in the boiler room.
Three chimneys, 180 meters high each, were built for pipe- bend of smoke gases.

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The machine room
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  #13  
Old 05-03-2016, 04:24 PM
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Default Energetic chart of Europe

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Energetic chart of Europe
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Old 05-03-2016, 04:27 PM
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The main building of the 5th rank is situated 1.5 km to the north of the main building of the 1st 4th rank.
The main building of the steam and gas plant (SGP) is a two bay one with an installed deairator device between boilers and an outhouse for the central control panel.
The machine room bay is 45 m, the boiler room one is 39 m, and a longitudinal pitch of columns is 12 m.
The frame of the building is made of bar constructions with steal crossbar girders and collar-beams of the deairator device.
The position of turbo units in the machine room is transversal. The thermal scheme is a block one.
Two steam and gas power blocks (ПГУ-250) work at Moldavian HPS. After gas turbine they discharge gases into fire-chambers of boilers and then into a 330-meter chimney.

The peculiarities of ПГУ-250 are:
- the possibility to burn various kinds of fuel in fire- chambers of boilers, while it is used limited amount of high- conditioned fuel for a gas-turbine unit (about 20 or 30 % of usual fuel consumption for a power block);
- the possibility of free-running work of the steam and gas turbines that increases the manoeurability of a power block;
- the possibility of step-by-step launching of steam and gas-turbine parts of a unit.

A gas-turbine unit is a one-shaft unit; a combustion chamber is remote. A turbine rotor is four-graded, a compressor rotor has 14 grades and provides the compression extend of 6.24, air consumption is 215 kg/s.
ПГУ-250 barring is automatic, the starting period till idling is 20 minutes.

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The central control panel of the 5th rank
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Old 05-03-2016, 04:29 PM
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The design group of the design and technical department.

After the gas turbine exhaust, containing up to 18 % of oxygen and having 4200 C, is directed into a fire-chamber of a boiler and used as an oxidizer.

A boiler unit has three-side composing and consists of a fire-chamber and a lowering convention shaft, connected with a transitional gas pipe. To decrease the temperature of outgoing gases after the convection shaft there is installed a remote economizer shaft where it is placed the steps of a water economizer. A boiler can work both under supercharge and under discharge. The technological scheme and equipment of the fuel economy provide separate receiving, keeping, preparation, and delivery of starting and gas turbine fuel at separate outlines.

At nominal working load the rated specific consumption of fuel by ПГУ-250 is 317g/kWth, and by a steam and power plant (ПСУ) it is 328 g/kWth.
The united support building of the 1st 4th rank is a four- storey building. There are administrative offices, laboratories. There are the chemical and water refinement shop, the repair- machine shop, the prerefinement, and the electrolysis shop in the one-storey outhouse.

The chemical and water refinement shop includes two units: salt depriving and softening. The first unit, with the productivity 250 cubic meters per hour, is used for filling up steam and condenses losses according to the scheme of two-step salt depriving. The softening unit, with the productivity 150 cubic meters per hour, is intended for the thermal system supplying.
The service building is a five-storey building where there are an administrative and service department, shower baths, and an aid station.

The service engineer building of the 5th rank is a fourstorey building where there are placed administrative, service rooms and laboratories.
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Old 05-03-2016, 04:30 PM
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The central laboratory of the chemical shop.
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Old 05-03-2016, 04:32 PM
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Name:	coal storehouse of Moldavian HPS.jpg
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The general view of the coal storehouse of Moldavian HPS.

The fuel economy consists of a three-track defreezing device of a convective type, an unloading machine with two 90-tone carriage over turnings equipped with crushing and milling machines, a coal storehouse with the capacity 370.000 tones, a crushing building, and a system of transporters.

The fuel oil economy includes eight fuel oil cisterns with the capacity 20 thousand cubic meters each, a fuel oil pumping section with pumps of the 1st and 2nd lifting, a fuel oil warmer, and a receiving and discharging machine with a discharging platform for 52 cisterns 60 tones each.

The system of technical water supplying consists of a freezer reservoir, four riverside pumping sections with water dippers, pump pipelines, and a system of closed and open discharge channels. The freezer reservoir (27 sq. m.) is created by an earth dam (4.22 km.) at the estuary of Kuchurgan-river. The earth dams were made for flood preventing along the reservoir side.
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Old 05-03-2016, 04:33 PM
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Nature protecting buildings and machines

Beginning with the very moment of Moldavian HPS construction the great attention was paid to nature protecting buildings. At the power station there are used scrubbers of ВТИ system with the efficiency 97.0 % as ash catchers. The gravel plant with the capacity 300 thousand tones a year was built at the territory adjoining the power station.
There was created the complex of refining buildings for neutralizing fueled and oiled sewer waters. The system of hydro ash removing is completely circled, and it solves the most important problem for providing the necessary chemical mixture of the water in the reservoir.
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Old 05-03-2016, 04:34 PM
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Electrical and technical buildings

Electric power is supplied at 110, 330, and 400 KV of voltage from open distributing devices (ODD) situated northwards of the main building.
ODD 110 and 330 KV are made according to the scheme with two working systems of bus-bars and a circuitous bus-bar system. ODD 400 KV is made according to the scheme of a quadrangular.
The link between ODD 110 KV and ODD 330 KV is performed with the help of two three-phase autotransformers, 125 MVA each, and the link between ODD 330 KV and ODD 400 is performed by two groups of one-phase autotransformers, 210 MVA each.

Two turbo generators with the capacity 200 MW are connected with the bus-bars of ODD 110 KV through the increasing transformers with the capacity 250 MVA. Eight turbo generators with the capacity 200 MW are connected with the bus-bars of ODD 330 KV through the increasing transformers with the capacity 250 MVA. Two turbo generators with the capacity 210 MW are connected with the bus-bars of ODD 400 KV through the increasing transformers with the capacity 250 MVA. Two generators ПГУ-250 are connected with the winding 35 KV of autotransformers of links 400/330/35 KV through the increasing transformers with capacity 80 MVA.

Needs of the power station are provided at the voltage of 6.0 KV and 0.4 KV. The block transformers of the station needs enter the taps of the generator voltage. One of the reserve transformers of the station needs is powered by the bus-bars 110 KV, and the other is powered by the low side (35 KV) of the autotransformers 1-2 AT.
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Old 05-03-2016, 04:35 PM
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Control and aotomatics

The control of station equipment functioning is performed at the block control panes. One control pane controls two power blocks (200 MW), and the other control pane is for steam and gas power blocks (250MW).
Tne block panes control, the chief and supporting equipment of the power blocks, and the equipment necessary to start and to stop blocks. Dispatching of the power blocks functioning, equipment control of ODDs and lines of electricity transmission with the voltage of 110 KV and 330 KV are performed with the help of the central control pane No.l, ana ODD 400 KV is controlled at the central control pane No.2.
The power station has the automated system of technological processes control (ASTPC), including two subsystems: the control of the technological part of the station and the control of the electro technical of the station.
The complex of technical means used for these subsystems consists of computers of CM-2M type and a set of communication devises with an object (CDO). Displays show technological
information, and at the central control pane heads of enterprises get information at their PCs.
For quick technological and service data exchanging therewas fixed the locaT PC network. The system "Expert" was installed to control power moving both at Moldavian HPS and all over Moldova. The system provides information for any period of time (since January, 1998).

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Displaying power quantity of all the lines of both riverbanks is performed by the system telemechanical measures sent to PC connected with the local Data processing network of Moldavian HPS.
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