Abstract
The paper analyzes the normal and emergency operation of rural distribution electric networks applying specialized software system - RASTRWIN PC, which is used at many power network enterprises in Russia. This specially designed program uses the RASTRWIN PC calculation core - Astra.dll, which calculates normal and emergency network conditions. It is used to solve the problem of calculating the modes of distribution networks 6-10 kV. To achieve greater accuracy of results, we use the scaling network parameters (currents, voltages, loads). For greater accuracy in calculating emergency conditions, the currents of the previous pre-emergency operation mode are used, as well as the dependence of the load current on the voltage in the network in emergency operation mode. The paper also substantiates the equivalent of the distribution network scheme based on a comparison of the calculation results of the modes for the full network section scheme and a simplified scheme. It is done to reduce labor costs when drawing up a design diagram of a distribution power network with a large number of taps on feeders. Using the developed program for a section of a distribution power network with the voltage 10 kV, normal and emergency operation modes of the network were calculated.
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