Abstract：With the growth scale of coal bed methane (CBM) industry, high cost of electricity caused by high energy consumption in the process of CBM extraction has became critical issue which restricts the sustainable development of CBM industry. According to the present situation on seriously unreasonable use of electricity, key energy-saving technologies involved in ground power supply system for CBM extraction were expounded.Furthermore, combined with the field conditions of CBM extraction, the novel ground power supply system of DC microgrid for CBM extraction was proposed, and several key technologies in the implementation were summarized and investigated. At last the feasibility of implementing the ground power supply system of DC microgrid for CBM extraction was analyzed and overviewed.

Keyword：coal bed methane (CBM) ;ground power supply system;DC microgrid;bus voltage;stability analysis;feasibility;