Diploma - power supply of machine-building plant

Contents

Project Technical Passport

Introduction

Characteristics of production

1 Calculation of electrical loads of industrial enterprise

1.1 Calculation of electrical loads of the electric shop

1.2 Calculation of electrical loads in the enterprise

1.3 Calculation of electric loads cartogram

2 Selection of number, power and type of shop transformers

transformer substations of the enterprise

3 Voltage selection, external power supply diagrams,

plant GPP transformers

3.1. Calculation of LV side loads

3.2.Selection of external power supply voltage

4 Feasibility study of schemes

4.1 Determination of losses in transformers

4.2 Calculation of the power transmission line from the district substation of the power system to the MPP of the enterprise

4.3 Calculation of short-circuit currents at the beginning of the outgoing line from the substation of the power system and at the inputs to the main lowering substation

4.4 Selection of switching equipment at the beginning of outgoing lines from the substation of the power system and at the GPP input

4.5 Selection of switching equipment - 35 kV

4.6 Selection of switching equipment - 110 kV

4.7 Technical and economic parameters of the compared external power supply schemes

5 Selection of voltage value and internal power supply diagram, calculation of supply lines

5.1 Voltage selection

5.2 Construction of power supply diagram

5.3 Electrical Design

5.4 Calculation of supply lines

6 Calculation of short-circuit currents

7 Selection of plant SES electrical equipment

7.1 Selection of GPP auxiliary transformers

7.2 RU choice on the party of NN GPP, switches, a TT and TON

7.3 Selection of current transformers on outgoing lines

7.4 Voltage Transformer Selection

7.5 Selection of current conductor connecting power transformers of GPP and 10 kV switchgear

7.6 Selection of 10 kV switches of internal power supply circuit and corresponding current transformers

7.7 Selection of switching equipment on the high and low voltage side of transformer substations

8 Reactive power compensation

9 Calculation of quality indicators

10 Selection of winding compartment equipment

11 Calculation of electric shop lighting (special question)

12 Relay protection of power transformers on GPP

12.1 TDN transformer differential protection - 16000/110/

12.2 Maximum current protection

12.3 Maximum current overload protection

12.4 Gas protection

13 Safety of life at the GPP

13.1 Design of GPP

13.2 Main dimensions and breaks ensuring safety of 110 kV RMS operations

13.3 Basic Requirements for Transformer Installation

13.4 Closed switchgear

13.5 Rules for Painting of Live Parts

13.6 List of Protective Equipment Used on GPP

13.7 Electrical safety

13.7.1 Installation of grounding knives, selection of locking system

13.7.2 Calculation of protective grounding of MCR GPP

13.8 Lightning protection

13.9 Determination of single-phase ground fault current value

13.10 Insulation signalling and monitoring devices

13.11 OPC lighting

13.12 Fire and explosion safety

14 Production management in the energy sector of the enterprise

14.1 System of enterprise energy economy objectives

14.1.1 Building the target tree

14.2 Force field analysis

14.3 Volumes of products and services to ensure the main production

14.4 Definition of types of organizational culture and structure of the enterprise and its energy economy

14.4.1 Organizational Culture

14.4.2 Organizational Structure

14.5 Functional Matrix and Job Description

14.6 Gantt Target Implementation Schedule

14.7 Labour and Wage Planning

14.7.1 Work Time Planning

14.7.2 Planning the number of workers

14.7.3 Planning of operational personnel

14.7.4 Planning of the number of repair personnel

14.7.5 Planning of management personnel

14.7.6 Planning of wages of workers

14.7.7 Planning of payroll of management personnel

14.8 Productivity Planning

14.9 Calculation of current energy service costs

14.10 Planning of current energy service cost estimates

14.11 Main indicators of energy economy

Conclusion

List of literature

Summary

In this diploma project, the power supply system of the group of workshops of the machine-building plant was designed. The proposed system enables rational generation, distribution and consumption of electricity.

During the project, the electrical loads of one workshop and the entire enterprise were calculated. Transformers of shop transformer substations were selected. Short-circuit currents are calculated, Taking into account which the necessary equipment of internal and external power supply circuits is selected. Feasibility study of the external power supply scheme was carried out. Reactive power was compensated and power quality indicators were estimated.

The issue of relay protection of power transformer GPP is considered.

The issues of life safety, organization and planning of the electric farm were studied.

Introduction

The energy program of Russia, developed for the long term, provides, first of all, for the wide introduction of energy-saving technology and technology.

Accelerating NTP places high demands on the basic sectors of the country's economy, which is energy. The production, transmission and rational distribution of electricity are becoming increasingly important. In light of the task of improving the technical level and quality of products, efforts should be directed and as soon as possible to improve the quality of electricity and improve the reliability of the power supply system. This is the key to solving the problems of designing and operating modern power supply systems of industrial enterprises.

The rationally designed power supply system of an industrial enterprise must meet a number of requirements: high reliability and economy, safety and convenience in operation, ensuring the required quality of electricity of the corresponding voltage levels, frequency stability, etc. The shortest time for construction and installation works and the necessary flexibility of the system should also be provided, ensuring the possibility of expansion during the development of the enterprise without significantly complicating and increasing the cost of the initial version. Thus, the variety of factors that must be taken into account when designing the power supply of the enterprise increases the requirements for the qualification of electrical engineers. Issues of rational power supply should not be resolved in isolation from the general energy of this area. Decisions should be made taking into account the prospective electrification plan of the area.

Characteristics of production

The process of this enterprise is typical for this type of enterprise - mechanical processing of parts, stamping and subsequent assembly of finished products. Electric receivers of enterprises belong mainly to 2 and 3 categories, as well as to 1 category, in relation to the reliability of power supply .

The main electric receivers are low-voltage asynchronous motors of drives of various technical equipment. Also at the workshop there are high-voltage electric receivers. These include four synchronous motors and four arc steel furnaces, the parameters of which are specified in the technical design certificate.

With regard to the environment, the plant produces virtually no specific emissions. There are also no hazardous vapors and gases inside the production premises. Thus, no additional equipment requirements are imposed. The main obstacle to operation is dust.

The average air temperature is 22.6 ° C. The average soil temperature at a depth of 0.7 m is 15 ° C. The main equipment of the plant is selected for temperate climate.

Ice area - 2. The wind pressure area is 2.

The corrosion activity of the soil is medium, there are wandering currents and tensile forces in the soil, therefore, taking into account these restrictions, a cable of the AAP2l type is accepted.

The annual number of hours the maximum load is used.

Cost of electricity at two-rate rate:

- main rate - 198.31 rub ./kW· months;

- additional rate - 1.144 rub ./kWh.

Conclusion

The developer of this diploma project analyzed the literature on this topic, calculated the electrical loads of the enterprise as a whole and made a detailed calculation of the electrical loads of the electric shop. To resolve the issue of the external power supply scheme, a technical and economic comparison of the variants of the external power supply schemes of the enterprise was made. Electrical equipment was selected for external and internal power supply, calculation and selection of means of compensation of reactive power of the enterprise. Electricity quality indicators were calculated. A detailed calculation of the lighting of the electric shop was made. Calculation of relay protection of power transformer GPP was carried out. The main provisions on life safety in relation to the operating electrical installations are given, calculation of protective grounding and lightning protection of MPP RMS was made, as well as selection of lighting means of this MPP.

As a result of the calculations, the power supply system of the machine-building plant was developed, which meets all the necessary requirements for uninterrupted and reliable power supply with minimal power losses.