과도안정도와 미소신호안정도 관점에서 국내 전력계통의 임계관성계수 평가

다국어 초록 (Multilingual Abstract)

The increase of inverter-based renewable energy sources reduces inertia constant of power systems and the loss of the system inertia may cause power system stability problems. To ensure a secure energy delivery system, these problems should be analyzed thoroughly from various perspectives about power system stability. This paper presents the estimation of the critical inertia of Korean power systems, which is the minimum amount of inertia required to maintain power system dynamic securities. The estimation has been made by gradually reducing the system inertia of Korean power systems and then by analyzing the change of dynamic securities in terms of transient and small signal stabilities. In the transient stability aspect, the decrease of critical clearing time(CCT) has been analyzed with four different reduced inertial models of Korean power systems. With the small signal stability perspective, the change of the system damping ratio has been studied. Based on the results from the stability studies, the critical inertia has been determined and it can be considered as the indirect limit of renewable energy shares in Korean power systems.

목차 (Table of Contents)

• Abstract
• 1. 서론
• 2. 관성계수 감소에 따른 동적안정성 영향
• 3. 관성계수 변화에 따른 국내 계통 동적 취약성 분석
• 4. 결론
• References

참고문헌 (Reference)

1 S. Sharma, "System Inertial Frequency Response estimation and impact of renewable resources in ERCOT interconnection" 1-6, 2011

2 S. Eftekharnejad, "Small signal stability assessment of power systems with increased penetration of photovoltaic generation : A case study" 4 (4): 960-967, 2013

3 "SSAT User Manual"

4 E. Vittal, "Rotor angle stability with high penetrations of wind generation" 27 (27): 353-362, 2012

5 NERC, "Review of Selected 1996 Electric System Disturbances in North America" 2002

6 POSOCO, "Report on Power System Oscillations experienced in Indian grid on 9th, 10th, 11th, and 12th August 2014" 2014

7 POSOCO, "Report on Low Frequency Oscillation in Indian Power System" 2016

8 "Powerworld corporation"

9 P. Kundur, "Power System Stability and Control" McGraw-Hill 1994

10 G. Rogers, "Power System Oscillations" Kluwer Academic 2000

11 P. W. Sauer, "Power System Dynamics and Stability" Prentice Hall 1998

12 Ministry of Trade, Industry and Energy, "New and Renewable Energy Policy Division"

13 S. Muyeen, "Modeling and Control Aspects of Wind power systems" InTech Open Science 2013

14 A. Ulbig, "Impact of low rotational inertia on power system stability and operation" 47 (47): 7290-7297, 2014

15 D. Gautam, "Impact of increased penetration of DFIG-based wind turbine generators on transient and small signal stability of power systems" 24 (24): 1426-1434, 2009

16 M. Rampokanyo, "Impact of increased penetration levels of distributed inverter-based generation on transient stability" 573-578, 2018

17 S. You, "Impact of high PV penetration on the inter-area oscillations in the U. S. eastern interconnection" 5 : 4361-4369, 2017

18 G. Lalor, "Frequency control and wind turbine technologies" 20 (20): 1905-1913, 2005

19 T. Smed, "Feasible eigenvalue sensitivity for large power systems" 8 (8): 555-563, 1993

20 Korea Power Exchange, "Explanation of Terminologies Connecting to Electric Power Transaction"

21 D. Zografos, "Estimation of power system inertia" 1-5, 2016

22 L. Shi, "Effects of wind generation intermittency and volatility on power system transient stability" 8 (8): 509-521, 2014

23 T. N. Zealand, "Effect of Solar PV on Transient Stability of the New Zealand Power System" Transpower New zealand Limited 2017

24 Mariesa L. Crow, "Computational Methods for Electric Power Systems" CRC Press 2015

25 ENTSOE, "Analysis of CE Inter-area oscillations of 1st December 2016" 2017