Two de-orbit projects of chemical propulsion and electric propulsion are compared.

We have introduced the different power supply plans of resident sub-district of urban power network in Cangzhou,analysed and contrasted the applied extent,advantage and disadvantage of several kinds of power supply plans.

Combining the hidden trouble of measuring apparatus and power stealing cases in practise,the paper points out the problems which need special attention in business expansion,the choice of power supply plan,construction design inspection and final course of receiving.

The essay analyzes the existing problems in traction power supply plan of Xuzhou railway power supply conjunction, such as: the arrangement of main and standby equipment in conjunction substation; options of external power source; incoming lines of sub-switching post of Xuzhou passenger station; the lining up of conjunction lines with the network and sectioning and splitting of OCS.

Optimal design on power supply scheme of new residential quarters;

220/20kV power supply scheme in high load density urban areas

Influences of power supply schemes on power supply losses

This paper briefly introduces the classification of the electric sources and the common power-supply schemes of the high-rise buildings, and makes emphatically the comparison of the standards, technical requirements, uses and applicability of the different kinds of urgent electric sources, and probes into some problems in the application of the EPS urgent sources system.

This paper introduces the scope of the subsidence area and shanty town in Datong Coal Industry Group Company,and according to the power-supply and electrical load around the subsidence area and shanty town,probes into the power-supply scheme for the subsidence area and shanty town.