Abstract
With the progress and development of human society, social activities are developing into mechanization and intelligence gradually. So the energy demands are increasing, especially the demand of the electrical energy which has already been the critical factors in our daily life. Electric power is one of the easiest, cleanest and the most widely used secondary energy source. Today the conventional power is converted from the primary energy, renewable energy and new energy, such as water power, nuclear energy, wind energy, geothermal energy, solar energy and ocean energy through the generating equipments, then it can be consumed through the system of electricity transmission, electricity transformation and power distribution. Electric power industry belongs to the public utility. It is an important basic industry in the national economy.
Recently, the residential area is very common in cities. The safety supply of electrical power should be the foundation of normal work life. Thus the power supply system design should be focused on the safety, the economy, the high quality and reliability, based on the ideas of energy-saving, low carbon and sustainable development, and conformed to the high-quality material and cultural needs.
Firstly, this design load calculates the residence community, then chooses the sets and the capacity of the transformers appropriately, thereby that specific power supply system can be ensured. Secondly the first system is short circuit calculated, and then the high-voltage device and lines are chosen and calibrated, also the relay protection and the grounding lightning protection setting will be stated simply. Finally the specific power supply system wiring diagram will be reached.
