RU39145U1 - ENERGY COMPLEX - Google Patents

Abstract

The utility model relates to energy and can be used to organize an energy complex as part of a nuclear power plant (NPP) and one or more pumped storage power plants (PSP).

The energy complex contains a nuclear power plant and directly adjacent to it an additional system of pumped storage power plants (PSP), which includes one or more stations with lower and upper basins.

As the lower basins for the PSP system, a cooling pond of the nuclear power plant was used. The upper pools of the PSPP are located on elevations with an elevation above the cooling pond, for example, at least 80 m. The buildings of the PSPP system are located at the foot of the hills and are connected to the cooling pond by supply (outlet) channels. The PSPP system serves as an emergency power source and is connected by a special power line to the responsible consumers of the nuclear power plant.

The energy complex was developed on the example of the conversion of the Kursk NPP and contains a nuclear power station and two pumped storage power plants.

Description

The utility model relates to energy and can be used to organize an energy complex as part of a nuclear power plant (NPP) and one or more pumped storage power plants (PSP).

As world experience shows, the limited maneuvering capacity of nuclear power plants is best compensated by their parallel operation with pumped storage power plants, which allows to reduce or eliminate a number of negative factors inherent in each of the participants of the complex during separate construction and operation of its facilities.

The well-known South Ukrainian energy complex (see. "Hydrotechnical construction", 5-2002, p.18-24, Landau Yu.A. "History and problems of the Tashlykskaya PSPP"). The complex includes the 1st and 2nd phases of the NPP and Tashlykskaya PSP. It is envisaged to use the head part of the Tashlyk reservoir, which is formed when it is separated by a cut-off dam, as the upper reservoir of the PSPP. The lower reservoir is the existing Alexander reservoir. However, the hydraulic connection of the cooling system of the NPP with the reservoirs of the PSPP is completely excluded. The PSPP basins do not participate in the cooling of water supplied to the NPP.

Known copyright certificate "Thermal gateway of the energy complex" No. 1351993, IPC E 02B 9/00 from 12.30.85. The complex includes a nuclear power plant (TPP), the cooling pond of which is the upper reservoir of the PSPP. The lower reservoir of the PSPP is also a reservoir - cooler. In this reservoir, a thermal lock is made in the form of a enclosing structure, the upper part of which is equipped with water outlet windows, and the lower part has water intake windows. During the operation of the PSPP in turbine mode, warm water from the upper reservoir is discharged into the cooling pond through the PSPP water pipes.

The thermal lock is not an energy source like a PSP and is not involved in lowering the temperature of the water supplied to the NPP.

The main tasks solved by the invention are:

- increase in the installed capacity utilization factor (KIUM) of the NPP, due to an additional decrease in the temperature of the water in the cooling pond due to the increase in the cooling surface due to the upper pools of the PSP;

- alignment of the daily schedule of the electric load in the operation of the NPP and an additional increase in the KIUM of the NPP due to the work with increased power;

- receipt of an additional emergency energy source for responsible consumers and NPP own needs;

- improving the reliability of nuclear power plants.

The identified tasks are achieved by the fact that the proposed energy complex contains a nuclear power plant and an additional system of pumped storage power plants (PSP) directly adjacent to it, including one or more stations with lower and upper basins. As the lower basins for the PSP system, a cooling pond of the nuclear power plant was used. The upper pools of the PSPP are located on elevations with an elevation above the cooling pond, for example, at least 80 m. The buildings of the PSPP system are located at the foot of the hills and are connected to the cooling pond by supply (outlet) channels. The PSPP system serves as an emergency power source and is connected by a special power line to the responsible consumers of the nuclear power plant.

The essence of the proposed utility model is illustrated in the drawing, which shows the plan of the energy complex.

The energy complex was developed on the example of the conversion of the Kursk NPP and contains a nuclear power plant - 1 as part of several power units. Cooler ponds - 2 of all power units and three phases of nuclear power plants occupy a total area of more than 30 km2 and have a hydraulic connection between each other. Directly to the reservoir-cooler - 2 of the third stage of the Kursk NPP (in the plan it occupies a northern position) adjoins two elevations exceeding more than 80 m above the water level in the reservoir-cooler, on which the upper pools of the pumped storage power plants are located - 3 and - 4 with mirror areas, respectively 3.3 km2 and 2.75 km2. The common lower pool for both PSPs is a cooling pond of a nuclear power plant.

The PSPP buildings - 5 and - 6 are located at the foot of the hills and are connected to the cooling pond - 2 inlet (outlet) channels - 9 and - 10.

Pressure pipelines - 7 and - 8 connect the PSPP buildings with the corresponding upper basins - 3 and - 4.

Power lines connect the PSP buildings with the responsible consumers of the NPP.

The energy complex operates as follows:

The operating nuclear power plant is equipped with electrical units with extremely limited maneuverability to change its capacity during the day. At the same time, the non-uniformity of daily electrical loads in the power system is up to 40%, which may lead to the need to reduce the capacity of a nuclear power plant at night (from 23 hours to 7 hours in the morning).

The energy complex assumes the excess night power of the nuclear power plant and thereby makes it possible to equalize the operation of the nuclear power plant in the daily load schedule. As electric loads in the power system decline after 23 hours, the PSP units are successively turned on, which, operating in the pump mode and consuming NPP energy, pump water from the reservoir-cooler of the NPP

pressure pipelines to the upper basin of the PSPP, located 80 m above the reservoir-cooler. The working volume of the upper basin makes it possible to lower the water level in the reservoir-cooler by a value of about 1 meter during the night period of the PSP operation in the pump mode.

Simultaneously with the pumping of water to the upper basin of the PSPP and due to this pool, the area of evaporation of warm water entering the reservoir after cooling of the nuclear power units increases and thereby the temperature of the water in the cooling pond decreases, which has a very favorable effect on the more complete use of the power of the NPP.

In the morning and afternoon hours of the day - during periods of peak loads in the power system, the water stored at night in the working volume of the upper basin of the PSPP allows you to generate maneuverable power for the peak zone of the load schedule of the power system. After shutdown, the units of the PSPP are transferred to the turbine mode as the need for the power system.

An additional effect of the construction of a system of pumped storage power plants as part of the Kursk energy complex is:

- use of the production base and the team of builders of the Kursk NPP;

- reduction of land allocation for the PSPP, in comparison with its construction at other sites, through the use of a reservoir-cooler as the lower basin of the PSPP;

- reduction of capital investments in the construction of the PSPP through the use of prefabricated structures, power lines of nuclear power plants and the production base of construction.

Bibliographic data of information sources:

1. "Hydrotechnical construction" 5-2002, p.18-24, Landau Yu.A. “History and problems of the Tashlykskaya PSPP”.

2. A.S. No. 1351993, IPC E 02 B 9/00 “Thermal gateway of the energy complex”.

Claims (1)

An energy complex containing a nuclear power plant (NPP) with a cooling pond and an additional system of pumped storage power plants (PSP) directly adjacent to it, including one or more stations with lower and upper pools, characterized in that a reservoir is used as lower pools for the PSP system -cooler of the nuclear power plant, and the upper pools are located on hills with an excess above the cooling pond, for example, at least 80 m, the PSPP buildings are located at the foot of hills and with Uniform cooling pond with a supply (diverting) channels, and the upper basin penstocks, additional system GAES emergency energy source is responsible for the consumer and coupled nuclear power lines with special responsible consumers nuclear power plant.