Maximum allowable distributed generation with protection system coordination and power loss considerations

Abstract

To propose a method for determining a maximum allowable distributed generation (DG) with protection system coordination and power loss consideration in a distribution system. Although there are a number of methods for determining a maximum DG penetration in a distribution system, only few works explicitly investigate impact on protection system coordination and power loss. In general, impacts of a DG connection, i.e. protection mis-coordination, power loss increase, and system service quality variation are not taken into account. In this thesis, protection adjustment procedures for increasing the maximum allowable DG are proposed. In addition, a method for evaluating the impact of DG connection on system service quality has been developed. As a result, the advantage and disadvantage of DG connection can be determined quantitatively. The proposed methods have been tested with the RBTS Bus 2 and an actual Provincial Electricity Authority (PEA) distribution systems. The results show the effectiveness of the methods to calculate for maximum allowable DG, system impact evaluation, and planning for DG connection.