Analytical approach for placement and sizing of distributed generation on distribution systems

Abstract

An analytical method for placement and sizing of distributed generation on power distribution systems for loss reduction is introduced. The proposed analytical method is developed based on a new formulation for the power flow problem, which is non-iterative, direct, and involves no convergence issues even for systems with high R/X branch ratios. Further, this power flow solution is extremely useful whenever fast and repetitive power flow estimations are required. A priority list based on loss sensitivity factors is developed to determine the optimal locations of the candidate distributed generation units. Sensitivity analysis is performed to estimate the optimal size and power factor of the candidate distributed generation units. Various types of distributed generators (DGs) have been dealt with and viable solutions are proposed to reduce total system loss. The proposed method has been tested on 33-bus and 69-bus distribution systems, which are extensively used as examples in solving the placement and sizing problem of DGs. Exhaustive power flow routines are also performed to verify the sizes obtained by the analytical method. The test results show that the proposed analytical method could lead to optimal or near-optimal solution, while requiring lower computational effort.

Progress on Protection Strategies to Mitigate the Impact of Renewable Distributed Generation on Distribution Systems

“…The connection of DGs has changed networks to be active and conventional protection system turn out to be unsuitable for this type of network [13][14][15]. For example, the sensitivity of line protection is reduced when a group of DGs cause reverse power flow.…”

Optimal Placement and Sizing of Renewable Distributed Generations and Capacitor Banks into Radial Distribution Systems

“…The distribution system has high resistance to reactance ratio, so the conventional load flow used in transmission line have convergence problem when using it in the distribution system [46,47]. Therefore, this study considers the backward-forward load flow analysis for power flow analysis.…”

Placement and Sizing of Distributed Generation on Distribution Systems with a Multi-Objective Particle Swarm Optimization and Analytical Approach: A Review

“…The analytical approach [3,13] basically provides the suitable solution on the basis of the analysis of the formulation of the model not on the repetitive solution of the model. More than one objective can also be taken care of by relating these formulas.…”