Complex transformer substation design -CW, POS, GP

Contents

Composition of the working project

Composition of performers

Chief Engineer Record

Contents:

Common part

Source Data

Technical and economic indicators

General plan

Construction Site Data

Construction part

Reinforced concrete structures

Power supply

On the high side of voltage 20.0 kV

Source Data

Characteristics of consumers

Definition of electrical loads

Power supply diagram

Electricity metering

Protective safety measures

Health and safety measures

Organization of electrical plant operation

Energy saving

Applications:

1) terms of reference

2) specification for power supply network reconstruction

1.1. Source Data

1.1.1 Basis for performance of the working project

are the following documents:

- State contract;

- technical assignment;

- specifications.

1.1.2. Type of construction - overhaul.

1. 1.3. This project has developed technical solutions for overhaul of the existing power supply scheme to ensure reliable power supply to electric consumers connected from power lines 20kV

- Repair of existing switchgear transformer substation (RTP) without increasing power consumption;

- Repair of the existing FTP (20/0.4) of the closed substation without increasing the power consumption;

- Monitoring of electric energy and power in RTP on the 20 kV side is provided;

- arrangement of foundations for FTP, complete supply with binding on the territory of sections.

3.1 Reinforced concrete structures

The section is designed in accordance with:

- SNiP 2.02.0183 * "Foundation of buildings and structures";

- SNiP 2.03.0184 "Concrete and reinforced concrete structures";

- SniP 2.03.1185 * "Protection of building structures

corrosion protection ";

The base for the foundation of the complete substation is crushed stone preparation (h = 400 mm GOST 826782 *), spilled with bitumen until full saturation, on rammed soil.

The foundation is a monolithic reinforced concrete slab with a plan size of 6600x 6550 a thickness of 300mm, on which foundation blocks are laid according to the dimensions of transformer substations.

Power supply:

On the high voltage side - 20.0 kV.

4.1. source data.

Working documentation for overhaul of the existing RTP - 20/0.4 kV located at the checkpoint and KTP 100/20/0.4 located on the territory of the Lotta residential complex, is made on the basis of:

1) Specifications issued by

Working documentation on overhaul of the existing power supply scheme was made on the basis of the technical assignment. According to which, to provide the electrical receiver of process and household electrical equipment (maximum consumed power of 600 kW), the project provides for the installation of a cable insert between supports No. 2 and No. 3 on the outgoing line VL20 kV to the side...... Branch from VL20kV.......... The design, in accordance with the Terms of Reference, provides for the installation of a complete single-transformer substation with full factory readiness at the cable insert with the installation of an existing transformer with a capacity of TMG250kVA, which is in working satisfactory condition. The existing mast KTP100 kVA for electric consumers of the residential complex is also to be dismantled. The design in accordance with the Engineering Specification provides for the installation of a new single-transformer complete substation of full factory readiness with the installation of the existing TMG100 kVA transformer in place, which is not subject to satisfactory condition and replacement.

The project was completed in accordance with the regulatory documents of PUE ed. 7; SNiP 3.05.06.85; GOST 1310997.

4. 2. characteristics of consumers. definition of electrical loads.

In terms of power supply reliability of the existing main process equipment, the existing electrical installation scheme belongs to the 3rd category of power supply reliability. Operation mode is single-shift.

4.3. power supply diagram.

The existing power supply scheme is carried out from a dead end single-transformer substation with a capacity of 250 kVA. The engineering specification provides for replacement of the dead end FTP with a pass-through with the same transformer power. The project provides technical solutions for the installation of a cable insert on VL20 kV between supports No. 2 and No. 3 of the line. The cable insert does not require protection against atmospheric overvoltage when the insert is used by cables with plpastmass insulation and shell. The project envisages cable insertion with a 20 kV single-core cable of APvP grade with insulation from cross-linked polyethylene with an aluminum core and a polyethylene shell for laying in an earthen trench. TU16.K713352004 factory manufacturer Sevkabel Holding. Cable termination is provided on supports by end cable couplings for plastic-insulated single-core cables for 20 kV voltage of the external installation, inputs to the 20 kV SPL of the substation are provided by end cable couplings for single-core cables of the internal installation .

The design provides for the installation of cable couplings on supports No. 2 and No. 3 according to the standard design of the series 3.40785 album III sheet 56. In order to maintain the normalized distance between the phases on the wooden supports, the design provides for the installation of an additional crossbeam to install a bracket with end cable couplings on it for a voltage of 20 kV.

The project, in accordance with the assignment for the design of overhaul of the power supply scheme, provides for the replacement of the existing RTP250 kVA kiosk version of a separate metal building on the territory of the customs checkpoint with a new one. A new complete pass-through single-transformer substation in two container blocks of sandwich panels is installed on a common concrete foundation, near 5 meters from the existing RTP-250. In accordance with the design task, the KTP manufacturer supplies the substation with full factory readiness without a 250 kVA transformer. The transformer is available from the Customer and is installed in place in the transformer compartment of the new KTP.

Second complete transformer substation for residential complex power supply located 5 km...... to be replaced with a new one. The existing mast-type FTP is a separate transformer power of 100 kW. The new dead end FTP is designed to install one transformer with a capacity of 100kW, has one air inlet with a voltage of 20 kV and 6 low-voltage cable switches. Protection of the power transformer on the 20 kV side is provided by a vacuum switch. Outgoing 0.4 kV cable lines to consumers are protected by circuit breakers. In accordance with the design task, the manufacturer supplies the substation with full factory readiness without a transformer. The Customer's transformer is available, installed on site.

The standard 100kVA and 250kVA STPN20/0.4 consists of two units. A set of busbars and cables for connecting the units to each other is included in the supply. RUVN20 of kV consists of one block. The unit is a container with thermal insulation 50 mm thick, lighting, heating and ventilation systems. Inside the unit there is a RU20kV consisting of cabinets with vacuum switches and measuring devices on extensible elements of KRU20 AT type. The use of insulated wall panels allows you to operate the substation in areas with harsh climatic conditions.

RUNN of 0.4 kV consists of one block which is completed with distribution panels of the ShchO70 (90) type, the compartment of the power transformer is completed with a set of designs for accession of conclusions of its windings to RUVN and RUNN blocks.

The design provides in accordance with the assignment for the design of the conversion of the existing 0.4kV cable lines to the new LV switchboard of the new KTP100 and KTP250 by increasing the cable with connecting couplings. Cables from mobile electric receivers are converted to a new LMG without increasing and replacing with new ones.

Power supply diagram is given on sheet 4 in section "POS."

Electrical receivers..... and residential complex located 5 km from.......... have existing diesel power plants as an independent independent power source:

- at DES1 checkpoint with capacity of 200 kW;

- at the residential complex of the DES2 checkpoint with a capacity of 100 kW.

Existing DPS have a degree of automation-2 and provide battery life without refueling -8 hours. The existing container design DES1 and DES2 are installed next to the designed FTP. The power and control cables from the existing DES1 and DES2 are re-installed via the input junction box inside the container. In existing diesel power plants, the manufacturer provides for blocking with a fire alarm and automatic fire extinguishing system, stopping the diesel generator and closing the process ventilation valves in case of fire.

In accordance with the requirement of NPB 11003, DES-1 and DES2 have a fire alarm and automatic fire extinguishing system (PIC and APT). Anti-icing system and anti-icing system signals are transmitted via existing cables to rooms with constant standby.

The designed FPS are provided in accordance with the design task of the automatic reserve entry panel (ATS). In case of power loss from FPS on 0.4 kV side, DPS automatic starting signal is generated by ALT panel. In the diagram of the ALT panel, the KTP manufacturer provides for electrical and mechanical interlocks that do not lower the parallel operation of the network and diesel generator of the power plant to the total load.

4.4. electricity accounting

Electricity accounting is provided for on the 20.0 kV side by the Euroalfa (EA) three-phase electronic multifunctional counter with an accuracy class of 0.5S with the possibility of transmitting measurement parameters to the control room. The counter is installed at the KTP250 input and on the outgoing line by the manufacturer.

The total accounting of electricity on the 0.4 kV side is provided by the electronic three-phase counter TsE6803, installed by the manufacturer at the input of RU0.4 kV of each FTP, accuracy class 1.0.

4.7.operating organization

Electrical installations.

The boundary of operational responsibility between the consumer and the power supply organization is established by mutual agreement of the parties on the basis of the "Act on the delimitation of balance and operational responsibility of electrical installations and structures."

The consumer must ensure the serviceability of his electrical installations.

The consumer is not allowed to connect the electric load in excess of the power supply organization permitted by the Specifications (600.0 kW), to increase the nominal value of currents of protective devices determined by the project.

The consumer is not allowed to change the electrical circuits and replace the protection devices with excessive nominal currents.

The consumer is not allowed to include electric receivers with disturbed electrical insulation in the socket network. All electric receivers must have a quality certificate and meet the requirements of GOST.

In accordance with "Rules for technical operation of electrical installations of consumers, g.1.2. Item 1.2.3. "Maintenance of the electrical installation with a voltage of 20/0.4 kV is carried out by the main power supply service.

4. 8. energy saving.

Power quality standards are applied in the design according to GOST 1310997. The reduction of voltage losses in the supply lines is provided due to a decrease in active resistance, which is achieved by increasing the cross section of the conductors. The project provides for the use of energy-efficient electrical equipment that meets the requirements of state standards.