Assessment of optimal allocation of renewable distributed generator sources in distribution network

Abstract

The integration of distributed generators (DGs) into distribution networks in optimal allocation is one of the main issues facing power system engineers to ensure improved stability and economic operation. This article presents a detailed analysis of the impacts of the optimal allocation and the number of DGs on both system steady-state and transient performances of distribution networks. An oscillatory particle swarm optimization (OPSO) algorithm was used to find the optimal allocations of DGs via minimizing various objective functions that deal with Total Transmission Losses, Voltage Regulation, and Power Performance Index. The OPSO is used to optimize these functions as a single and as a multiobjective optimization problem. The effectiveness of the method is demonstrated with the IEEE-14 bus as an example of distribution networks with a 50% increase in system loading. Two penetration scenarios have been considered, the optimal sizes and locations of DGs are obtained, and the results are presented.In addition, the impact of the penetration level of Photovoltaic and Wind Energy sources on transient performance is obtained using detailed nonlinear models of both synchronous machines and DGs sources. The system response is then obtained when the system is subjected to a three-phase short circuit fault for six cycles and the results are presented in a comparative form for different penetration levels. The techniques and results presented in the article form a useful base for power system engineers in planning and operating distribution systems with high penetration levels of RDG sources. K E Y W O R D Sconcentrated and distributed DG (C-DG, D-DG), distributed generation (DG), optimal DG allocations, oscillatory PSO, penetration level.

Event analysis and real‐time validation of doubly fed induction generator‐based wind energy system with grid reactive power exchange under sub‐synchronous and super‐synchronous modes

“…Optimal placement of RPGs has been studied for the improvement of voltage stability and loss reduction. 2,3 However, addition of RPGs in power system will produce frequency stability issues. Consequently, primary frequency regulation and virtual inertia supports are to be suitably incorporated in RPGs.…”

“…Penetration of renewable energy sources in power system, will improve its voltage profile and reliability. Optimal placement of RPGs has been studied for the improvement of voltage stability and loss reduction 2,3 . However, addition of RPGs in power system will produce frequency stability issues.…”

Impact of replacing overhead lines with aerial bundled cable, and installation of new transformers to reduce losses and improve distribution network voltage profiles, technical and economic analysis

“…Reference 18 use a combination of genetic algorithm (GA) and particle swarm optimization using to optimize DG in distribution networks. The review article presented by Jordi shows that proper allocation of DGs can enhance reliability and reduce investment and operational costs 19 . The proposed review work at Reference 19 identifies the research gaps and offers some helpful suggestions for future research on the allocation of DG.…”

“…The review article presented by Jordi shows that proper allocation of DGs can enhance reliability and reduce investment and operational costs 19 . The proposed review work at Reference 19 identifies the research gaps and offers some helpful suggestions for future research on the allocation of DG. Karami et al 20 employs a GA for optimal location and optimal size of DGs and shunt capacitors due to the capability of the loading.…”