Combined Firm and Renewable Distributed Generation and Reactive Power Planning

Yasaman Niazi,Mohamad Esmail Hamedani Golshan,Hassan Haes Alhelou

doi:10.1109/access.2021.3115151

Yasaman Niazi, Mohamad Esmail Hamedani Golshan + Show 1 more

Open Access

https://doi.org/10.1109/access.2021.3115151

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Journal: IEEE Access	Publication Date: Jan 1, 2021
Citations: 14	License type: CC BY 4.0

Affiliation: Isfahan University of Technology

Abstract

The benefits of integrating Distributed Generation (DG) into the distribution networks depend on the characteristics of different types of DG units, loads and Reactive Power Sources (RPS). These benefits can be optimized if the firm DG units such as biomass energy and renewable DG units such as photovoltaic (PV) and wind system are optimally sized, located and coordinated with reactive power sources. In this paper, by assuming that the Distribution System Operator (DSO) has got the ownership and operation of DG units and RPS, a new planning strategy is proposed for determining the optimal placement and rating of DG units and RPS. This strategy overcomes the challenge of intermittency of renewable production in order that this planning will assist the system operators in defining the better integration strategies of firm and intermittent energy systems and reactive power sources in distribution networks. The proposed planning is based on single objective optimization so that it optimizes one of the following objective functions every time: the system energy losses, voltage stability margin, self-adequacy of microgrids defined on the distribution system and exchange of active and reactive powers between the distribution system and upstream network. The proposed technique accounts for the uncertainties associated with solar irradiance, wind speed and demand through a probabilistic optimization. The formulation of each planning problem is presented and applied to the 69-bus distribution system. The results of different planning strategies are compared and analyzed. Furthermore, the impact of the planning with each objective function on other indices is evaluated.

Highlights

This paper intends to emphasize the importance and practicality of single objective Distributed Generation (DG) and reactive power planning, especially when the problem is a probabilistic one with many states of load and generation through investigating different selected objective functions on results of defined probabilistic planning for simultaneous renewable and firm DG and reactive power
Investigating importance and practicality of single objective DG and reactive power planning, especially when the problem is a probabilistic one with many states of load and generation by defining a joint planning problem for renewable distributed generation and reactive power sources on the multi-year planning horizon
The most reduction occurs in case 16 (BWSQ) that biomass, wind, PV and reactive power sources are present at the same time

Summary

INTRODUCTION

This paper intends to emphasize the importance and practicality of single objective DG and reactive power planning, especially when the problem is a probabilistic one with many states of load and generation through investigating different selected objective functions on results of defined probabilistic planning for simultaneous renewable and firm DG and reactive power. Considering only an objective function and using a single objective optimization formulation for DG and reactive power planning is an advantage for the distribution network operator. For this purpose, the paper proposes a DG and reactive power planning with only an objective function.

PROBLEM FORMULATION

OBJECTIVE FUNCTIONS

RESULTS AND DISCUSSION

CONCLUSION