електропостачальна система

Parallel Operation of Transformers Within the Power Supply System of a Mine

Connecting transformers in parallel requires a few of important requirements. During operation of the industrial supply power systems, there are sometimes situations when it becomes desirable to operate of parallel transformers, the characteristics of which do not quite correspond to such a procedure. When transformers are connected in parallel, any difference between their parameters causes the load to be redistributed between them compared to the previous operating mode they had been operating in isolation.

Concerns of Operating Compensation Devices in Mine Electric Grids

Reactive power compensation equipment in industrial electric power supply systems generally operates in environment of significant harmonic distortion currents, which are caused by presence of nonlinear loads. A common practice in such cases is the use of compensation schemes, which consist of a combination of filters and capacitor banks. The paper presents study of operation conditions such compensation scheme in the power grid supplying coal mine.