Hybrid AC-DC electrical installations on low-voltage level

The paper describes combined electrical installations of AC-DC grid used on the household level of 230 V. There was a discussion about possible directions in the view of integration of existing EPS and new technology of green energy. DC voltage level, of energy consumption cannot be ignored, because of the rapid growth of solar plants present on the household level. In order to reduce losses of energy due to conversion, and analysis of numeric representation of DC load, combined AC-DC electrical installations suggested. This installation can be simply realized by upgrading it on existing AC standard. All DC load would use power supply, when solar household plants have enough power, and when this is not case, then load would use power supply from AC grid. Thereby AC load would be used as before. Also, all existing DC devices which provide AC/DC converters with power supplies could be used in the same way. This concept would increase efficiency of using power produced on the local scale, and because of lower price would stimulate supplier/users of electrical energy to concentrate consumption in the time of solar periods. It would contribute great in more stable work of distributed grids, and it would lower overall losses in electrical power systems.