Novel analytical method for the placement and sizing of distributed generation unit on distribution networks with and without considering P and PQV buses

•A novel analytical method is proposed for optimal sitting and sizing of DGs.•Proposed analytical method does not require bus impedance matrix.•Concept of P and PQV buses is introduced in the load flow algorithm.•A simple method based on loss reduction is suggested for selecting P bus.•Optimal sitting and sizing of DG unit is also obtained considering P and PQV buses.

This paper proposes a new analytical method for placement and sizing of distributed generation (DG) units for loss reduction. This analytical method for DG placement in the distribution network is developed based on a new mathematical formulation which does not require bus impedance matrix. This is the main advantage of the proposed method. This paper also proposes the placement and sizing of DG unit considering two novel bus types, i.e., P and PQV buses. The ‘P’ bus is represented by real power specification only whereas the ‘PQV’ bus is one whose voltage magnitude is remotely controlled by the ‘P’ bus. A simple method is suggested to select ‘P’ bus in a distribution network to control the voltage magnitude of ‘PQV’ bus. The effectiveness of the proposed method is demonstrated through examples of 33 bus and 69 bus distribution networks.