Stochastic Approach to Hosting Limit of Transmission System and Improving Method Utilizing HVDC

Dongyeong Lee,Gilsoo Jang,Junghun Lee

doi:10.3390/app12020696

Dongyeong Lee, Gilsoo Jang + Show 1 more

Open Access

https://doi.org/10.3390/app12020696

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Journal: Applied sciences	Publication Date: Jan 11, 2022
Citations: 2	License type: CC BY 4.0

Affiliation: Korea University

Abstract

According to the global de-carbonization trends, renewable energy integration has become an increasingly important issue in power systems. To achieve 100% renewable energy integration and operate a system with these resources, it is necessary to appropriately evaluate the system hosting capability and prepare appropriate planning and operation strategies using the evaluation result. So far, these interests have focused particularly on distribution-level systems. However, although the hosting limit in transmission-level systems requires further consideration, previous study is limited. This study introduces the constraints on the transmission-level hosting limit. In addition, a stochastic estimation of the hosting limit methodology in the transmission system and the use of a high voltage direct current system to improve hosting capacity are proposed and evaluated. Moreover, these methodology-based simulations are conducted using possible scenarios on the IEEE 39 bus system with some constraints, and the simulation results are presented herein. The results showed that the HVDC location selection and operation using the proposed method and optimization technique is appropriate. The strategy can be used to integrate more renewable energy. Furthermore, the proposed methodology can be applied to renewable energy integration scenario establishing a plan.

Highlights

Due to the climate crisis, energy issues are emerging, and in response, our power grids are rapidly changing from fossil fuel generation-based to eco-friendly renewable energybased systems
To determine the operating point to increase the limitations determined by the above approaches, we proposed a methodology using a sensitivity-based approach called power transfer distribution factors (PTDFs) for transmission expansion and operation using high voltage direct current (HVDC)
Thethe synchronous generator is de-committed as the as Unlike the thebase basecase, case,where where synchronous generator is de-committed penalty of the increases, the hosting capacity limit is increased when it is maintained the penalty of the distributed energy resources (DERs) increases, the hosting capacity limit is increased when it is mainas a synchronous condenser without being turned off.turned

Summary

Introduction

Due to the climate crisis, energy issues are emerging, and in response, our power grids are rapidly changing from fossil fuel generation-based to eco-friendly renewable energybased systems. Concerns related to grid stability and reliability deterioration are emerging owing to the variability and uncertainty of distributed energy resources (DERs) because many fossil fuel-based synchronous generators are decommissioning. Several impacts of these variable DERs on the grid stability and reliability have been presented [3]. Renewable energy-based DERs exhibit characteristics, such as variability and uncertainty; a stochastic approach is required to describe the generation output of these resources. Hosting capacity refers to the possible maximum penetration capacity of DERs that a renewable energy resource can accommodate in a grid without any serious negative phenomenon and operate satisfactorily [21]. The possible criteria include the following [22]:

Methods

Results

Conclusion