Optimal integration of multi-type DG in RDS based on novel voltage stability index with future load growth
- PDF / 1,438,748 Bytes
- 15 Pages / 595.276 x 790.866 pts Page_size
- 62 Downloads / 179 Views
ORIGINAL PAPER
Optimal integration of multi‑type DG in RDS based on novel voltage stability index with future load growth Shradha Singh Parihar1 · Nitin Malik1 Received: 23 March 2020 / Accepted: 20 September 2020 © Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract In this article, a novel voltage stability index is proposed for the optimal placement and an analytical as well as particle swarm optimization method is implemented for optimal sizing of different types of distributed generation (DG) in a radial distribution system. The three types of DG considered are Type I, Type II and Type IV model. The methods account for changes in long-term system load profile in the planning phase to enhance power system performance. The load model chosen is composite. The optimal power factor and the cost of the DG are also considered. The efficiency of the proposed technique is tested and validated on IEEE 33-bus and 69-bus systems. The significant savings in annual energy loss, reduction in system power losses with upgraded voltage profile is observed for Type IV DG at optimal PF over other types. The results attained are further compared to other analytical and nature-inspired methods to exemplify the dominance of the proposed methodology. The statistical analysis has also been carried out for both bus systems without and with considering all types of DG. Keywords Distributed generation · Radial distribution system · Siting and sizing · Optimal integration · Composite load model · Load growth
1 Introduction 1.1 Motivation A distributed generation (DG) at the distribution level is a decentralized small-scale on-site generation of electrical power by non-conventional (small hydro, solar, wind, fuel cell, geothermal, biomass, etc.) or conventional (engine, turbine, etc.) resources and technologies near the load center to serve local demand. Due to socio-economic and environmental issues, the share of DG resources in the power distribution system (DS) has increased rapidly. The optimal integration of DG upgrades the bus voltage profile, minimize system power losses, minimizes congestion and defer system capacity upgrades but it may create adverse effect to the stability of the smart DS by overheating of distribution feeders, excessive system power losses and reverse power flows if they are not integrated into the DS optimally. As load flow calculation is a pre-requisite for planning, operation
* Nitin Malik [email protected] 1
The NorthCap University, Gurugram 122017, Haryana, India
and power exchange between utilities, it becomes mandatory to solve load flow problem of the DS including single or multiple DGs.
1.2 Literature survey The methods for integration of DG are categorized as analytical methods and meta-heuristic approaches. The analytical methods make use of analytical expressions to compute the optimal solution. Authors in Acharya et al. (2006) and Gözel and Hakan (2009) developed an analytical expression to determine the DG size at unity power factor (PF) without considering the be
Data Loading...
