Tóm tắt:

In MV grid planning, apart from forecasting the power demand, the structure of grid is the key factor that must be taken into account. In Vietnam, MV grids are usually close-structured with one open node. To apply the mode, the location of open node must be specified appropriately. This location will affect not only the technical parameters but also economical ones of grid. The paper presents modified algorithm used to determine the optimal open nod in 22kV grids of Vietnam. Base on the algorithm, some computations are implemented with Dien Bien 22kV grids to prove the effectiveness of nod’s location. The results as well as the method presented in the paper will be utilized for further medium voltage grid planning in order to minimize the power losses.