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과도안정도와 미소신호안정도 관점에서 국내 전력계통의 임계관성계수 평가
백종오(Jong-Oh Baek),정인주(In-Joo Jeong),하정민(Jung-Min Ha),맹창엽(Chang-Yeop Maeng),권오근(Oh-Geun Kwon),이배근(Bae-Geun Lee),김수배(Soobae Kim) 대한전기학회 2019 전기학회논문지 Vol.68 No.9
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.
Response Characteristics of Aeroelastic Systems Using Robust Controller
나성수(Na, Sungsoo),정인주(Jeong, In-Joo) 한국소음진동공학회 2005 한국소음진동공학회 논문집 Vol.15 No.4
This paper presents a robust aeroelastic control methodology of a two dimensional flapped wing system exposed to an incompressible flow field. A robust controller is designed using a linear matrix inequality (LMI) approach for the multiobjective synthesis. The design objectives are to achieve a mix of $H_{\infty}$ performance and H₂ performance satisfying constraints on the closed loop pole locations in the presence of model uncertainties. Numerical examples are presented to demonstrate the effectiveness of LMI approach in damping out the aeroelastic response of 3-DOF flapped wing system.?????會??????????會??????????會?????????會?????蠻????會?????瀕????會??????솬??저會?저????????會??????????會???????????會????瀕????會?????????會????????㈀會?㈀備??????會????