Improving reliability of power supply and the quality of electrical energy and safety in rural settlements
Abstract
This article analyzes the state of the issue of power supply in a rural settlement on the example of the Shampan village of the Tashkent region. In particular, the number of 10 / 0.4 kV transformer substations and the length of 10 and 0.4 kV networks. Collected statistical materials on the voltage level of subscribers, the total load of transformers and the load on individual phases. Based on these data, a conclusion was made on the unsatisfactory state of the issue of power supply to the settlement. To increase the reliability of power supply, it is recommended to use self-supporting insulated wires (SIP) for voltages of 0.4 and 10 kV. To improve the quality of power supply, reduce the one-time power of the transformer substation to 25 kVA and include in the project the installed capacity of one house equal to 4 kW. To ensure electrical safety, a circuit has been developed with a neutral isolated from the ground with two neutral wires: working and protective. Protection circuits against single-phase earth faults have been developed. Switching in 10 kV networks is performed by reclosers - automatic sectioning points (APS). The calculation of the reduction in the cost of losses in 10 / 0.4 kV networks has been carried out.