The Ledvice Power Station

 

The Ledvice Power StationThe Ledvice Power Station

PP Ledvice is situated at the foothill of the Krusne Mountains eastern part, between the spa towns of Teplice and Bilina.

The power plant was constructed in the period of 1966 – 1969, with the total power output of 640 MW. After the construction completion, the PP Ledvice resource base consisted of five power production units, having the following power output parameters: B1 – 200 MW, B2 – 110 MW, B3 – 110 MW, B4 – 110 MW, B5 – 110 MW.

Turbines are designed as condensing active three-stage single shaft machines, with a single overheating part, eight steam extraction outlets providing for a heating of utility water driving three-phase alternators with hydrogen close-circuit cooling. The turboset has been supplied by Skoda Plzen, its manufacturer. The steam for Unit no. 1 (200 MW) and Unit no. 2 and 3 (2 x 110 MW) was produced by single steam overheat and dry-bottom once-through boilers. For the remaining units, nos. 4 and 5 (2 x 110 MW), the steam was supplied from a pair of drum boilers (natural circulation with a single steam overheating including a double pass combustion granulating chamber).

As of 1 February 1994, the Unit no. 5 operation was discontinued, and on 31 December  1998, the Unit no. 1 operation was concluded .

In the period of 1992 – 1994, the 110 MW Units no. 2 and 3 experienced a turbine replacement, and now are capable of 170 NW heat supply from each unit. Another 44 MW heat power take-off is provided by a turbine from Unit no. 4. The turbines have been supplied by Skoda Plzen.

In the period of 1996 – 1998, a general repair of Unit no. 4 turbine was performed,  together with a fluidized bed boiler construction. On 1 November 1998, Unit no. 4 trial operation commenced,  as a power source featuring a fluidized bed boiler unit turbine arrangement.

The units incorporate three-phase generators with direct hydrogen cooling of stator lamination. The three units, still projected for future operation, were extensively modified. The modification objectives focused on a reduction of electricity production environmental impacts. For Unit no. 2 and 3, a desulphurization facility was provided.

Units no. 2 and 3, additionally, were provided with other equipment: nitrogen oxide emissions are reduced through primary measures during the combustion process;  electrostatic precipitators were completely reconstructed. Due to the desulphurization nowadays, fly-ash emission values are about 15 mg/Nm3. In 1995, a new evaluation system for combustion products pollution contents concentration measurements was installed.

New fluidized bed boiler, supplied by ABB – Power Systems. The fluidized bed boiler technology provides solutions to a wide range of gas, sulphur oxide, nitrogen oxide, and carbon dioxide emission problems, dust particle emissions included.

In PP Ledvice, brown coal of 11 – 13 MJ/kg CV (calorific value) from Bilina Mines is burnt. The coal is transported directly on belt conveyers from the nearby Ledvice Coal Cleaning Plant, either directly to boiler coal bunkers, or to an operation deposit of 40 000 t capacity, supporting the power plant operation in case of emergency in coal transport or mining.

The main water sources are provided from Elbe River, with Vsechlapy Dam as a backup water source. Water filtration and demin treatment takes place in a modern water chemical treatment plant, having adequate parameters to ensure required both quantity and quality of service water for steam circuits of power plant production units.

Apart from electricity production, PP Ledvice supplies heat power for customers in nearby vicinity, and it provides heat power to the towns of Teplice and Bilina, through United Energy utility company. The electricity and heat power production combined in a single cycle, i.e. co-generation, reduces coal consumption per a power unit produced, thus partially eliminating environmental effects.

The total yearly supply of heat power to various customers equals to, approximately, 1 000 TJ, with the maximum heat power output of 150 MW. The power output installed for heat supplies equals to 380 MW, and the water chemical treatment plant allows for 270 MW supplies to heat distribution networks. The power plant, therefore, features a substantial power output reserve, providing for a possible connection of other consumers (the town of Duchcov, e. g.), and an increase in supplies to existing locations.

Production unit - Ledvice II
Installed power output 2 x 110 MW
Operation commenced in the year 1966-68
Desulphurized since the year 1996 (2 x 110 MW) 1998 (1 x 110 MW – fluidized bed boiler)

 

Production unit - Ledvice III
Installed power output 110 MW
Operation commenced in the year 1998

 

Secondary power-producing products

Based on the burning process in the course of the production of electric energy and heat, there are generated the secondary power-producing products that become, on the assumption that the technical and legal conditions have been met, the raw material for further processing and production.

The waste generated in the burning and desulphurization process is transformed to a secondary raw material usable namely in the building industry and recultivation of the worked-out Fučík quarry. The raw material in question is the so-called stabilizate that is generated in the mixing equipment from the end-product of desulphurization, ash and water.

Heat - The Ledvice Power Station

In addition to production of electric energy, The Ledvice Power Station provides heat supplies for customers in the nearby vicinity, and it also provides heat power to the towns of Teplice and Bílina, through United Energy utility company. The electricity and heat power production combined in a single cycle, the so-called co-generation, reduces fuel consumption per a power unit produced, thus partially eliminating environmental impacts.

The total annual supply of heat power to various customers equals to, approximately, 1,000 TJ, with the maximum heat power output of 150 MW. The power output installed for heat supplies equals to 380 MW, and the waste water chemical treatment plant capacity allows for 270 MW supplies to heat distribution networks. The power station, therefore, features a substantial power output reserve, providing for a possible connection of other consumers (e. g. the town of Duchcov), and an increase in supplies to the existing locations.

Advantages of heat supply from the power station include reasonable and competitive prices, and operating-technical and price stableness of supplies.

When can you visit us?

The Ledvice Information Centre is open to the public Monday to Friday always from 7 a.m. to 3 p.m. In case of larger groups the visit can be booked in advance via telephone at 411 10 2313 or by e-mail: infocentrum.ele {zavináč} cez {tečka} cz. The Information Centre was built within the ongoing complex renewal of coal power plants and construction of the new generator in Ledvice. Modernisation of power plants will result in further improvement of the environment in the North of Bohemia.

mapa LedviceWhere can you find us?

The Ledvice Power Plant Information Centre is not located in Bílina, but close to Ledvice!

Fotogalerie

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