Installation of Sectionalizers in a Radial Distribution Networks to Create an Emergency Islanded Network Powered by Distributed Generators During Outages

The paper considers the use of sectionalizers to isolate a damaged section of a medium voltage (MV) radial power network of 6-10 kV and create energy islanded network that can be powered by distributed generators (DGs). The configuration of power networks with one and two sectionalizers and a different number of DGs, which are separated over the network zones, is considered. To avoid the use of labor-intensive discrete calculations, the authors propose a simplified method for calculating the reduction of the expected energy not-supplied (EENS) to the consumers due to create energy islanded network. This method suggests replacing discrete load distribution with a standard function. All calculations come down to selecting the load distribution function and obtaining the result from the tables (placement of the sectionalizer and the EENS in this case). The table is easy to use when designing to find the optimal location for installing a sectionalizer in a power network.