A Study on Frequency Stability and Primary Frequency Response of the Korean Electric Power System Considering the High Penetration of Wind Power

Sunghoon Lim,Kipo Yoon,Taewan Kim,Jung-Wook Park,Donghee Choi

doi:10.3390/en15051784

Sunghoon Lim, Kipo Yoon + Show 3 more

Open Access

https://doi.org/10.3390/en15051784

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Journal: Energies	Publication Date: Feb 28, 2022
Citations: 3	License type: CC BY 4.0

Affiliation: Yonsei University, Cheongju University

Abstract

The high penetration of wind power decreases the system inertia and primary frequency reserve while replacing the conventional synchronous generators (SGs). Therefore, if the system operator does not take appropriate action on the remaining generation units (GUs) operation, high penetration of wind power will aggravate the frequency stability. To solve this problem, wind power plants (WPPs) may provide the inertial response and primary frequency response (PFR) to support the frequency stability. However, due to the variability of renewable energy, WPPs may not provide adequate frequency response whenever it is required. This paper proposes an algorithm to determine the operation of GUs to provide appropriate PFR for a power system with high penetration of wind power. Through the proposed algorithm, it calculates the required PFR to restore the decreased frequency stability caused by the high penetration of wind power. Then, while considering the available PFR from WPPs, it redetermines the droop coefficient of SGs governor to provide the sufficient PFR to recover the frequency stability. Finally, the effectiveness of the proposed algorithm is verified on the practical Korean electric power system.

Highlights

Published: 28 February 2022Following the global trend of increasing the hosting capacity of the wind power plants (WPPs) to solve environmental and economic issues, the government of Korea is planning to increase the capacity of WPPs to 17.7 GW by 2030 [1,2]
With the Ploss of 1500, the fset reduced from 59.834 Hz to 59.705 Hz by (6), which is beyond the fSSband
Even though various power reserve control methods have been developed for WPPs in recent studies, due to the technical and operational limits, WPPs may not provide power reserve or inertial response whenever it is required

Summary

A Study on Frequency Stability and Primary Frequency

SungHoon Lim 1 , Taewan Kim 1 , Kipo Yoon 1 , DongHee Choi 2 and Jung-Wook Park 1, *. The present work is an extension of the paper “Assessment of Frequency Response in Practical Korea Electric. Power System Considering Wind Power Curtailment and Inertial Response” presented to APAP 2021.

Introduction

Operation of Wind Power Plants

Frequency Stability Analysis Based on Penetration of Wind Power

Proposed Droop Coefficients Determination Method

Characteristics of Korean Electric Power System

Simulation Results Based on Proposed Droop Coefficients Determination Method—Case

Conclusions and Future Work