Electric energy is the main energy and power of modern industrial production. Electric energy can be easily converted from other forms of energy and can be easily converted into other forms of energy for supply; The transmission and distribution of electric energy is not only simple and economical, but also convenient for control, adjustment and measurement, which is conducive to the automation of production process. Therefore, electric energy is widely used in modern industrial production and the whole national economic life.

In factories, although electric energy is the main energy and power for industrial production, its proportion in product cost is generally very small (except electrochemical industry). The importance of electric energy in industrial production lies not in its proportion in product cost or total investment, but in the fact that electrification of industrial production can greatly increase output, improve product quality, improve labor productivity, reduce production cost, reduce workers' labor intensity and improve workers' working conditions, which is conducive to the automation of production process. On the other hand, if the power supply of the factory is suddenly interrupted, it may have serious consequences for industrial production.

Therefore, how to correctly calculate and select the transformer capacity and other main electrical equipment of substations at all levels is an important prerequisite to ensure safe and reliable power supply for enterprises. Doing a good job of power supply in factories is of great significance for developing industrial production and realizing industrial modernization. Because energy saving is an important aspect of power supply in factories, it has great strategic significance for national economic construction. Therefore, power supply in factories should serve industrial production, ensure the needs of power consumption in production and life, and do a good job in energy saving.

In addition, in the power supply work, it is necessary to handle the relationship between the local and the overall situation, the current and the long-term, not only to take care of the local current interests, but also to have a global view, which can not only take care of the overall situation, but also adapt to development.

This design is divided into eight parts, starting with load calculation and reactive power compensation; Then, the main wiring scheme of main transformer and substation is selected; Secondly, calculating the short-circuit current; Selection and verification of primary equipment in the fourth substation; Selection of incoming and outgoing lines and adjacent cables in the fifth substation; Selection of the sixth secondary circuit scheme and setting of relay protection; The seventh is reference; The eighth is to design the general plan.

catalogue

I. Load Calculation and Reactive Power Compensation

Second, the selection of main transformer and main wiring scheme in substation

Third, the calculation of short-circuit current

Four, the selection and calibration of substation primary equipment

Verb (abbreviation of verb) Selection of incoming and outgoing lines and adjacent cables in substation

Selection of secondary loop scheme of intransitive verb and setting of relay protection

Seven. refer to

Eight, design drawings

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