Power supply project in the village of Saltanovka, Navlinsky district

Contents

Introduction

1 Characteristics of the designed object

2 Design and processing part

2.1 Calculation of electrical loads

2.1.1 Calculation of loads for residential buildings

2.1.2 Calculation of loads for the House of Culture

2.1.3 Calculation of street lighting

2.2 Requirements for reliability of power supply

2.3 Definitions of allowable losses

2.4 Transformer Rated Power Selection

2.5 Electrical mains calculation 0.38 kV

2.5.1 Wire section selection and voltage loss calculation

in VL 0.38 kV

2.5.2 Determination of voltage dip depth at

start of asynchronous motor

2.6 Selection of wire section and calculation of voltage loss in

VL 10 kV

2.7 Calculation of short-circuit currents and selection of equipment

protection

2.8 Selection of lightning surge protection

2.9 Calculation of grounding devices

3 Organizational and operational part

3.1 Organizational measures ensuring

safety of works in electrical installations

3.2 Technical measures in electrical installations

3.3 Power supply reliability categories

3.4 Measures to improve the reliability of power supply

4 Environmental and safety issues

4.1 Means and methods of protection on electric damage

current

4.2 Requirements for grounding devices

4.3 Classification of rooms according to damage conditions

electric current

4.4 Protective equipment used in electrical installations

4.5 Provision of fire safety of electrical facility

nabzheniye

4.6 Environmental measures

5 Design part

5.1 General characteristics of overvoltage and facilities

protection against them

5.2 Overpressure surge protection

5.3 Protection against direct lightning strikes

5.4 FTC grounding

6 Economic evaluation of reconstruction effectiveness

power supply

6.1 Determining Capital Costs

6.2 Determination of annual depreciation costs

6.3 Determination of annual costs of power losses

6.4 Determination of costs for maintenance wages -

cleaning and repair personnel

6.5 Material and Spare Parts Costs

6.6 Determination of Consumer Power Cost

Conclusion

Literature

Summary

The diploma project consists of 97 sheets of explanatory note, which includes six sections and a graphic part of drawing paper made on 8 sheets of A1 format.

In the first section, the characteristics of the object and the organizational and economic assessment of the economy are given.

In the second section electric loads are calculated, transformers are selected, short-circuit currents are calculated, TP electrical equipment is selected.

The third section is devoted to organizational and operational measures to improve the reliability and safety of electricity supply.

In the section of ecology and life safety of the project, an analysis of the state of labor protection and the environmental situation in the village was carried out.

The fifth section describes methods for surge protection with calculations.

In the sixth section, an economic assessment of the effectiveness of overvoltage protection was carried out.

Introduction

In this diploma project, the power supply system of the village of Apazh, Komarichsky district, was reconstructed.

The need for reconstruction arose due to the fact that the power supply system is outdated physically and mentally, namely, it does not meet today's requirements for reliability, electrical safety, and the ability to provide consumers with the necessary amount of electricity.

Using the latest reference data on the calculations of loads of utility consumers, industrial consumers, lighting loads, we choose the power of complete transformer substations, transformers of the main lowering substation, the calculation of elements of the power supply system is carried out. Namely, switching protection equipment, sections and grades of wires of power transmission lines are selected and checked.

The voltage stages of the distribution network used earlier in the power supply system will not change. That is, communication of the village with the power system will be carried out via 10 kV AC, and distribution networks inside the village are carried out with 0.4 kV voltage.

This diploma project also presents sections of the economy and life safety, which consider the tasks of labor organization, the cost of electrical equipment and electrical installation work, issues of labor protection of workers, safe methods of electrical installation work. All elements of the power supply system of the village and the electric network must meet the requirements of electrical safety.

2.2 Requirements for Reliability of Electrical Equipment

Electrical networks must reliably supply the consumer with electricity of proper quality (at stable voltage and frequency) and meet the requirements of electrical and fire safety.

The electrical installation rules establish the following requirements for reliability of power supply:

low asymmetry of phase currents and voltages or its complete absence;

maintaining current and voltage frequency at a given level;

ensuring uninterrupted power supply according to established rules and norms;

power supply according to established rules and norms;

approximation of the value of cosetato one.

Conclusion

In this diploma project the calculation of power supply of Saltanovka village was made. In the course of the diploma project, the following issues were considered: characteristics of the design object, calculation of electrical loads, power selection of power transformers, selection of grade and section of 10 and 0.38 kV VL wires, selection of protective equipment, calculation of grounding devices, protection of the transformer substation from overvoltage. issues of ecology and life safety are considered.

Calculations in the economic part showed that the installation of lightning arresters, new arresters, protection equipment and the replacement of wires of the overhead line of 10 kV not only reduces power losses and increases the reliability of power supply to consumers, but also allows to reduce the damage from underutilization of electricity to consumers due to emergency line outages. The payback period of the transformer substation reconstruction is 1.03 years. Based on all of the above, I believe that it is advisable to reconstruct the power supply of KTP No. 110.

The decisions made in the diploma project meet the requirements of safety regulations.