Reconstruction of power supply system and selection of electrical equipment - diploma

Contents

Introduction

1 Characteristics of electric power area and consumers

1.1 Process Summary

1.2 Technical characteristics of production machines

1.3 Brief description of the construction part of the site and characteristics

environment

1.4 Characteristics of consumers on reliability of electric power supply

which energy

2 Calculation of electrical equipment of the section

2.1 Calculation and selection of engines by type, power and environmental conditions

environment

2.2 Calculation and selection of motor control and protection equipment

2.3 Calculation and selection of sections of conductors and cables supplying electrical

engines

2.4 Development and description of electrical circuit diagram

equipment

3 Calculation of power supply area

3.1 Reconstruction of the section power supply system, distribution

loads by power supply units

3.2 Calculation of electrical loads

3.3 Selection of number and power of transformers taking into account compensation

reactive power

4 Calculation of 0.4 kV supply and distribution network

4.1 Calculation of nominal and design currents

4.2 Selection of protection devices and switchgear types

4.3 Selection of sections of wires and cables of supply and distribution

networks

4.4 Voltage Loss Mains Check

5 Selection of electrical equipment and KTP assembly

6 Earthing calculation

7 Energy and resource saving

8 Occupational and environmental protection

9 Economic part

Project Findings

Literature

TNAP List

Appendix A Calculation of electrical loads

Summary

The diploma project was completed on ___ pages, and includes an introduction, 9 sections, a conclusion, a list of literature, a list of TNPA, ___ annexes, ___ tables, ___ drawings. The graphic part of the diploma project is made on 4 sheets of A1 format .

Keywords: Electrical equipment, electric lighting, power supply, transformer substation, labor protection.

The design included calculation and selection of lighting installations of power electrical equipment, the power supply scheme was selected. The power supply and distribution network were also calculated and a power supply was selected .

In accordance with the goals and objectives of the diploma project, energy-saving measures, labor protection issues were considered, calculations of technical and economic indicators were made.

The graphic part shows the layout of electrical equipment and the laying of the power and lighting network, the schematic diagram of the electrical principle machine, the schematic diagram of the transformer substation.

Introduction

Energy of our country provides reliable electricity supply to the national economy of the country and residential needs of various consumers of electric and thermal energy. The main consumers of electric energy are various industries, transport, agriculture, communal services of cities and towns. At the same time, more than 70% of electricity consumption falls on industrial facilities. Electricity is widely used in all sectors of the national economy, especially for the electric drive of various mechanisms. Power supply systems of industrial enterprises consisting of networks with voltage up to 1 kV and above transformer, converter and distribution substations are used to ensure the supply of electricity in the required quantity and appropriate quality from power systems to industrial facilities, installations, and mechanisms. Electric installations of electric power consumers have their own specific features; they have certain requirements: reliability of supply, quality of electricity. When designing, constructing and operating power supply systems of industrial enterprises, it is necessary to correctly select voltages, determine electrical loads, select the type, number and power of transformer substations, types of their protection, reactive power compensation systems and voltage control methods. This should be done taking into account the improvement of technological processes of production, the growth of capacities of individual electric receivers and the peculiarities of each enterprise, workshop, plant, improving the quality and efficiency of their work. The transmission, distribution and consumption of generated electricity in industrial enterprises should be carried out with high economy and reliability. To ensure this, power engineers have created a reliable and economical system for distributing electricity at all stages of the applied voltage with maximum approximation of high voltage to consumers. Diagrams of substations of various voltages and assignments are simplified due, for example, to failure of switches at primary voltage with blind connection of substation transformers to supply lines. Diploma design is the final stage of study and is carried out after completing a full theoretical course and passing students all tests, exams, course projects and works provided for in the curriculum. The tasks of the degree design are to study the organization and management of production, to check the ability of the student to independently perform professional functions.

Characteristics of the mechanical installation area

1.1 Process Summary

The installation and mechanical section is a structural unit of the Minsk power supply distance of the UP "Minsk branch of the Belarusian Railways" and is directly subordinate to the leading mechanic.

The mechanical installation section is governed by the current legislation of the Republic of Belarus. Legislative and regulatory documents regulating issues related to the work performed, methodological materials related to issues related to the activities of the section, the Charter of the Belarusian Railway, the Rules of Internal Labor Regulations, and the Regulation on Discipline of Railway Workers.

The installation and mechanical section is headed by the master of the section, who is appointed and relieved of his post by the head of the car depot.

The main tasks of the site are: fulfillment of production tasks on the required volume of repair, quality, specified nomenclature, increase of labor productivity, reduction of labor intensity based on rational loading of equipment and use of its technical capabilities, increase of equipment shift rate, economical consumption of raw materials, energy and cost reduction.

The mechanical installation section performs the following functions in accordance with the assigned tasks:

- modernization of equipment;

- repair and adjustment of hydro and pneumatic systems;

- repair of lifting equipment;

- testing of lifting equipment;

- repair and maintenance of ventilation systems, welding equipment, compressor units, air collectors and air supply systems, machine equipment;

- service and repair of shutoff valves, heating systems, boilers of heating, coppers, boiler equipment, pumps of jet washers;

Maintenance and maintenance of showers and bathrooms, sewage networks and wells;

- fulfillment of tasks on transportation of materials, equipment and spare parts;

- maintenance and repair of the equipment according to the scheduled preventive repair schedule. [1].

Energy and resource saving

Since electricity and fuel costs in the overall structure of the enterprise's expenses in 2020 are 0.5% and have a steady upward trend, energy conservation measures will be one of the significant reserves for improving the efficiency of the enterprise.

In this regard, this diploma project proposes the following measures to ensure increased efficiency of the installation and mechanical section due to energy saving:

Replacement of worn heat trays with pre-insulated pipes

Replacing Window Blocks with Energy Efficient Glazing

Replacement of PSH lamps with Yupiter36