Design of RPA substation 110-35-10 kV

1. General provisions

1.1. Design Input

The following materials are accepted as initial data:

- design task.

1.2. Basis for Project Development

The basis for the development of the project is the documents :

- Contract agreement for performance of design works.

- Dop. Agreements Nos. 1 and 2. to the main contract.

1.3. Brief description of the object and its composition

1.3.1. The designed project is intended for distribution of the electric energy received from PS of 110/35/10 kV of "KKZ" and represents set of transfer devices which consist from:

- integrated transformer substation TP1 10/0.4 kV with transformer of TSZGL type with capacity of 1600 kVA

- built-in transformer substations TP2, TP-3, TP4 10/0.4 kV with transformers of TSZGL type with capacity of 2500 kVA each

- 10 kV cable transmission lines from TP4 to TP3, from TP3 to TP2, from TP2 to TP1.

1.3.2. The projected installed capacity is 7000 kW with a utilization factor of 0.8.

Current collectors belong to category I on reliability of power supply.

For standby power supply installation of DPS of appropriate capacity is required. The design of DES is performed by a third-party organization.

Source of power supply of ZRU10 of kV of PS of 110/35/10 kV of "KKZ".

1.3.3. The quality of transmitted electric energy corresponds to GOST 1310997 "Electric energy. Electromagnetic compatibility of hardware. Quality standards of electromagnetic energy in general-purpose power supply systems "subject to the implementation of decisions made in this project.

1.3.4. The technical level of power transmission services meets the requirements of:

- PUE

- MN 17475 "Instruction on design of power supply of industrial enterprises."

Electrical solutions

2.1. Integrated transformer substation TP1 10/0.4 kV.

Based on the design assignment, the project provides for the installation of one transformer of the TSZGL1600 kVA type with a voltage of 10/0.4 kV produced by Ukrelektroapparat CJSC in Khmelnitsky. Transformers are provided with degree of protection IP00. Nominal voltage of the primary winding 10 kV, secondary 0,4 kV. Circuit and group of winding connection - D/Un-11. Voltage is controlled without excitation, with the transformer disconnected from the mains from the HV and LV side, in stages with a range of +/2x2.5%.

On the party of 10 kV the complete distributing device of production of CJSC Elektrograd Kryvyi Rih consisting of the KSO298.ED cameras with vacuum BB/TEL10/630 switches, RVFZ10/630 and RVZ10/630 disconnectors, transformers of TPOL10 current and also the device of protection PC80M2 is used.

The used 10 kV equipment is certified in Ukraine.

2.2. Built-in transformer substations TP2 (TP3, TP-4) 10/0.4 kV.

In built-in transformer substations the following equipment is used:

- on the 10 kV side, a complete switchgear is used from KSO298.ED chambers with vacuum switches of type BB/TEL manufactured by ZAO Electrograd, Krivoy Rog.

- installation of one power transformer of TSZGL2500 kVA type, 10/0.4 kV voltage produced by Ukrelektroapparat CJSC in Khmelnitsky.

Transformers are provided with degree of protection IP00. Nominal voltage of the primary winding 10 kV, secondary 0,4 kV. Circuit and group of winding connection - D/Un-11. Voltage is controlled without excitation, with the transformer disconnected from the mains from the HV and LV side, in stages with a range of +/2x2.5%.

2.3. Electricity metering

In the designed transformer substations TP1, TP2, TP3, TP4 10/0.4 kV, technical accounting will be provided on the basis of electronic meters of the transformer connection. Counters will be installed on the facade of the 0.4 kV introductory panels.

2.4. Energy saving

Energy saving is achieved by optimal loading of power transformer, selection of section of conductor material corresponding to minimum losses, provision of voltage level at consumer on the basis of GOST 1310997.

2.5. Grounding

The grounding device inside the built-in TPs is made of strip steel with a section of 4x25 mm, laid along the perimeter of the rooms at a height of 0.2 m from the floor with pins ST10 attached to the walls.

Grounding of 10 kV cells is carried out by attaching them to supporting steel structures using a flexible jumper. To ground the transformer housing, bring the grounding conductor under the transformer grounding bolt.

For grounding of metal gate and door flaps provide a flexible bridge between the gate panel, doors and internal grounding loop.

To protect against corrosion, welded joints should be coated with bitumen varnish. All metal parts of the substation that may be energized due to insulation failure shall be connected to the grounding loop.

Connect the internal grounding circuit in at least two places to the common grounding circuit of the hatchery.

The earthing loop leads to the outside and the grounding conductor passes through the walls in the pipes in place.

Due to the fact that TP rooms are built in, lightning protection of transformer substations is provided in the design of the production building.

Connections of grounding conductors to each other shall provide reliable contact and shall be performed by overlapping welding. Length of welds shall be not less than six diameters of grounding conductor.

All work on the underground part of the grounding device shall be performed simultaneously with construction works.

2.6. Electric lighting

Electrical lighting shall be performed in accordance with the requirements of PUE, SNiP 3.05.0685 "Electrical devices" and GOST 21.60884.

Accept operating lighting for voltage ~ 220 V, repair lighting - for voltage ~ 36 V, emergency lighting.

Lighting is provided by fluorescent lamps and lamps with incandescent lamps.

Height of switches installation is 1.5 m; Wiring shall be performed by cable of IWGng grade on walls and structures on brackets.

You can connect lights to a group network using terminal blocks. The ends of the wires to be connected to the lighting fixtures and electrical installations shall have sufficient length margin to be reconnected in the event of a break.

Relay protection and automation

3.1. Relay protection

The accepted volume of relay protection ensures the required reliability of power supply to consumers according to PUE. AC operating current, 220 V.

The design includes calculation of maximum and minimum short-circuit currents, calculation of current protections of designed connections of 10 kV.

3.2. Types of protection

In TP1... TP4 for the lines supplying the transformer, current protections are made on the basis of static relays of the PC80M28 type .

In TP4 at inputs N1 and N2, the current protection is made on the basis of the static relay PC80M219 with the function of APV (see calculations). Actuation setpoints are selected based on calculation results.

Thermal protection is provided on the power transformer.

3.3. Control, Automation and Alarm

The design was carried out in accordance with section III of PUE and section 7 of the "Process Design Code."

AC operating current, 220 V.

Control of 10 kV connection switches of the designed TP1... TP4 is carried out from buttons providing local switching on and off in normal modes .

. Automatic shutdown in emergency modes is performed at actuation of corresponding protections.

Control of the switch drive is provided from the control unit installed on the cabinet door.

The signalling circuits of the designed connections provide:

-light alarm of the switch position corresponding to the signals:

"Switch on," "Switch off";

-signalling of switch emergency shutdown at relay protection actuation corresponding to signal "Switch emergency shutdown";

-signalling warning about deviations from normal mode and corresponding to signal "Power supply failure."

In TP1... TP4, control, alarm and heating busbars are organized in the SNVA cabinet.

Central alarm circuits are made in cabinet of sectional disconnector.

Electric Power Measurement

Electric power measurement at the designed connections shall be performed within the scope stipulated by the applicable codes and regulations.

Current measurement is provided on the designed connections.

Online Lock

To prevent erroneous operations during maintenance and repair in the designed cabinets, mechanical interlock between the main and grounding knives of the disconnectors is provided.

Secondary switching and cabling

The secondary switching and the cable system are made in accordance with the applicable codes and regulations.

In TP1... TP4, the laying of control and power cables is provided in cable channels and structures.

Copper control and power cable of corresponding section are used.

10 kV cable lines

4.1. Electrical solutions

The project provides for the laying of 10 kV cable lines on the territory of the Vinnytsia Broiler Poultry Farm hatchery station.

The selection of the 10 kV cable section was made in accordance with the PUE requirements for the design load, checked for long-term permissible load and thermal resistance to short-circuit current.

To laying cables with isolation from the sewed polyethylene on voltage of 10 kV of APvEgPng10 brand section 1kh300mm2 are accepted.

Cable screen cross-section is selected according to permissible current of one-second short circuit in accordance with "Guide on selection, laying, installation, testing and operation of cables made of cross-linked polyethylene for voltage from 6 to 35 kV" Kharkiv, 2007. ZAO Yuzhkabel Plant.

4.2. Brief description and justification of construction solutions

The designed 10 kV cable lines shall be laid in a trench in pipes at a depth of 1 m.

Lay the cable at temperature not lower than 15 ° С. The minimum bending radius of the cable shall be at least 15 outside diameters.

Above the cables in the trench lay the signal tape in accordance with the requirements of PUE2009.

Single-core cables are laid in the form of a tie (in a triangle) of three cables covered every 11.5 m.

Cables shall be laid in accordance with the requirements of PUE and SNiP 3.05.0685 "Electrical Devices" at points of intersection with underground communications.

In structures, cables are laid by cable structures. Grounding of cable structures is performed by strip steel 40x4mm welded to brackets that attach the racks.

Construction solutions

5.1. Brief description of the construction site area

The 10 kV RP construction sites are part of TP 1, TP 2, TP 3, TP 4, which are located on the territory of the Zernoproduct branch.

Climatic conditions in the area of TP location are accepted according to PUE and DBN B.1.2-2: 2006:

- temperature of the coldest five-day period, С - 21;

- standard snow load S0, Pa 1360;

- standard wind load W0, Pa 480;

- depth of soil freezing, m - 1.0;

- seismicity, points - 6

According to the data of engineering and geodetic surveys performed by SBC Vodproekt OJSC, the soil at the loam construction site is hard, dark yellow, with the following physical and mechanical characteristics:

soil specific gravity - 1.73 kN/m3;

deformation modulus - 15 MPa;

internal friction angle - 22 degrees;

specific adhesion 23;

type of soil conditions by leakage - I.

5.2. Brief description and substantiation of architectural and construction solutions for main structures

The designed part of TP1.. -.. TP4 involves the installation of foundations for equipment and cable channels in 10 kV switchgear rooms.

RP 10kV room with area of 25.5 m2is 2.53x10.08m in plan view,

Level of a clean floor of the room RU10kV is taken for a conditional otm.0.000

5.3. Principle decisions on the accepted structural scheme

Foundations for equipment and cable ducts are designed according to standard design 4073170/74.

Walls of channels are made of monolithic concrete. B15, W4, F25 200m and 250m thick.

Embedded parts are provided for fixation of equipment.

Embedded parts are made in cable channels for installation of cable racks as per etc. 4073170/74 step of 800 mm.

Openings measuring 0.4x0.7m are provided for cable insertion in the channel walls.

Cable ducts and backup pits for installation of equipment 0.9m deep are covered by corrugated steel.

5.4. Substantiation of fundamental decisions on illumination of workplaces, reduction of production noise and vibrations, household and sanitary services of workers.

In 10 kV switchgear rooms (TP 1, TP 2, TP 3, TP 4) artificial lighting is used to perform maintenance, operational switching and equipment repair according to the requirements of DBN B.2.5282006.

Noise and vibration from production equipment do not exceed permissible levels according to GOST 12.1.00383 and GOST 12.101290, which are regulated by state standards of labor safety.

5.5. Measures for electrical, explosion, and fire safety, protection of building structures, networks and structures from corrosion.

Electrical safety of structures is ensured by:

- connection of TC metal structures to grounding devices performed in accordance with PUE;

- arrangement of current-carrying parts at distances regulated by PUE;

Fire safety of structures is ensured by:

the use of non-combustible building materials and structures during the construction of the substation (R 120, MO - according to the requirements of DBN B.1.1-7-2002);

connection of AR metal structures to AR grounding devices, which are performed in accordance with PUE;

thorough sealing of gaps in pipes and openings in which cables are laid by easily penetrated non-combustible material when they pass through walls.

Corrosion protection of steel structures is provided by manufacturers supplying steel structures and CH 784 varnish for priming in accordance with the requirements of SNiP 2.031185, Appendix 5.

To protect reinforced concrete structures from corrosion, bitumen coating (2 times) of surfaces contacting the soil is performed.

5.6. Water supply, sewerage, heat supply, ventilation and air conditioning

The design ambient temperature for the design of heating, ventilation and air conditioning is accepted:

- for winter period tn. = 21 ° C;

- for summer period (parameters A) tn = 23 ° C;

- for summer period (parameters B) tn = 27.3 ° C;

Heating is not provided, since the design outside air temperature in the cold period is higher than the minimum permissible temperature required for normal operation of the installed equipment.

Ventilation of rooms RU10 of kV of "NominativeC". - natural. Inflow is carried out by infiltration through looseness of doorways and cable channels, exhaust is organized through louver grilles installed in openings of facades of these rooms. Emergency ventilation is also provided, designed for five times air exchange per hour.

Considering the peculiarities of the process of power transmission and operational maintenance, the water supply, sewerage and conditioning of transformer substations is not designed.

5.7. Lists of individual and reapplication projects

Construction solutions for the design of foundations under. equipment and cable channels of TC are individual development and re-use projects are not used.

Assessment of the environmental impact of the designed facilities

The process of conversion, transfer and distribution of electric energy to the designed facilities does not result in any waste and does not create emissions of pollutants into the atmosphere.

The designed facilities are not a source of contamination of surface water and groundwater.

The designed object has no harmful effect on the soil cover.

The location and nature of the designed substations does not have a man-made effect on the animal world.

The production noise and vibration levels of the equipment used are within the limits of the maximum permissible levels as per GOST 12.1.00383 and GOST 12.1.012.90 .

Conclusions

The designed facilities do not create factors that have a negative impact on the environment:

- are not sources of harmful emissions into the atmosphere;

- Are not sources of water and land pollution;

- do not require the creation of a sanitary protection zone;

- Do not pose a threat to human health;

- do not affect the plant and animal world;

- do not create solid waste to be disposed of and disposed of.

The section "Assessment of the environmental impact of the designed facilities" was carried out on the basis of the following regulatory documents:

1. DBN A.2.2-1-2003 "Composition and content of environmental impact assessment (EIA) materials in the design and construction of enterprises, buildings and structures. Design Philosophy. "

2. The Environmental Protection Act.

3. SNiP II1277. Design Standards. Noise protection. - M., Stroyizdat, 1978.

4. Derzhavni sanitarni rules planuvanna ta forget the population of the settlements. Dated 19.06.96 No. 173

5. GOST 12.1.02880 Noise. Methods for determining noise characteristics of noise sources. USSR Civil Code by standards, M. 1980

6. Catalogue of noise characteristics of process equipment (to SNiP II1277). NIISF Gosstroy of the USSR. -M., Stroyizdat, 1988

7. Fire safety and fire protection systems

List of main regulatory documents:

GOST 12.1.00491 SSBT "Fire Safety. General requirements ";

SNiP-II-89-80 "General plans of industrial enterprises";

GOST 12.4.00983 * SSBT "Fire equipment for protection of objects. Main types, accommodation and maintenance ";

NPB B.01.03499/III Fire safety rules in companies, enterprises and organizations of the energy industry of Ukraine;

DBN B.2.51398 * "Fire automation of buildings and structures";

RD 34.21.12287 * "Instruction on lightning protection of buildings and structures";

ONTP 2486 * of the Ministry of Internal Affairs of the USSR "All-Union Norms of Technological Design";

Electrical Installation Rules;

NAPB B.06.0042005 "List of facilities of the same type, which are to be equipped with automatic fire extinguishing and fire alarm units";

DBN V. 1.1-7-2002 "Fire safety of construction facilities."

Fire safety of equipment on the TP is ensured during the following fire prevention measures:

- use of technically advanced equipment without design defects, in accordance with the specifications of manufacturers for this equipment;

- use of switching devices with working contacts in vacuum for disconnection of loads;

disconnection from relay protections of individual TP elements in case of short circuit;

interlocking of switching sets, which prevents disconnection of loads by devices not intended for this purpose;

making connections and branches of cables and wires by means of pressing, welding, soldering or special clamps in order to avoid fire-hazardous transient resistances, to avoid overheating and damage to the insulation of joints. The current of insulation losses of joints shall not exceed the current of insulation losses of whole cable cores;

connection of TC metal structures to grounding devices, use of non-combustible building structures during construction of substations;

for evacuation of people from TT rooms there are doors with exit to the outside, which open in the direction of movement, according to the requirements of PUE and DBN B.1.1.72002.

welding and other flammable works are allowed only on equipment that cannot be carried out, having previously completed fire prevention measures in accordance with the "Fire Safety Rules";

selection of substation elements (equipment, devices, cables and bus bars) resistant to thermal and dynamic action of short-circuit currents;

- use of power and control cables with non-combustible insulation;

- sealing of cable passages through walls and partitions with fire-resistant materials with fire resistance of at least 0.75 hour;

a set of primary fire extinguishing equipment; powder and carbon dioxide fire extinguishers, a box with sand (capacity 0.5m3), fire fighting equipment (shovels, bricks, scrap), etc.;

explanatory signs according to GOST 12.4.02676, which indicate the location of fire extinguishing equipment.

05-13 Карта уставок.dwg

ТП ПС 110-35-10 кВ.dwg