• Title/Summary/Keyword: Transient Stability Index

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The Incapacition Method of Power System Assessing Transient Stability Index and Voltage Drop/Rise Duration Index (계통 안정도 모의를 통한 전력계통의 무력화 방안)

  • Lim, Jae-Sung;Kang, Hyun-Koo;Kim, Taek-Won;Moon, Seung-Il;Lim, Wan-Khun
    • Journal of the Korea Institute of Military Science and Technology
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    • v.12 no.4
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    • pp.532-539
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    • 2009
  • When assailing some area, it is important to consider targeting power system. This paper describes effective method that power networks are incapacitated based on assessing TSI and VDI. For this, we compose realistic scenario and analyze the simulation results in a view of stability. The simulation results show the destruction effects when occur the contingency in the specified area. To perform this process, the simulation tool PSS/E and DSAT are used.

Identification of Correlative Transmission Lines for Stability Prediction

  • Cho, Yoon-Sung;Gilsoo Jang;Kwon, Sae-Hyuk;Yanchun Wang
    • KIEE International Transactions on Power Engineering
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    • v.11A no.4
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    • pp.15-20
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    • 2001
  • Power system stability is correlated with system structure, disturbances and operating conditions, and power flows on transmission lines are closely related with those conditions. This paper proposes a methodology to identify correlative power flows for power system transient and small-signal stability prediction. In transient stability sense, the Critical Clearing Time is used to select some dominant contingencies, and Transient Stability Prediction index is proposed for the quantitative comparison. For small-signal stability discusses a methodology to identify crucial transmission lines for stability prediction by introducing a sensitivity factor based on eigenvalue sensitivity technique. On-line monitoring of the selected lines enables to predict system stability in real-time. Also, a procedure to make a priority list of monitored transmission lines is proposed. The procedure is applied to a test system, and it shows capabilities of the proposed method.

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Identification of Correlative Transmission Lines for Stability Diagnosis of Power System (전력계통의 안정도 진단이 가능한 선로 선정에 관한 연구)

  • 조윤성;장길수;권세혁
    • The Transactions of the Korean Institute of Electrical Engineers A
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    • v.52 no.5
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    • pp.271-278
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    • 2003
  • Power system stability is correlated with system structure, disturbances and operating conditions, and power flows on transmission lines are closely related with those conditions. This paper proposes a methodology to identify correlative power flows for power system transient and small-signal stability prediction. In transient stability sense, the Critical Clearing Time is used to select some dominant contingencies, and Transient Stability Prediction index is proposed for the quantitative comparison. For small-signal stability, this paper discusses a methodology to identify crucial transmission lines for stability Prediction by introducing a sensitivity factor based on eigenvalue sensitivity technique. On-line monitoring of the selected lines enables to predict system stability in real-time. Also, a Procedure to make a priority list of monitored transmission lines is proposed. The procedure is applied to a test system and the KEPCO systems in the year of 2003 and it shows capabilities of the proposed method

A Study on Transient Stability Augmentation by Transfering Line and Bus (송전선 절체제어에 의한 전력계통 안정화 연구)

  • Suh, Eui-Suk;Oh, Tae-Kyoo;Han, Hoo-Sek
    • Proceedings of the KIEE Conference
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    • 1998.11c
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    • pp.1029-1032
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    • 1998
  • This paper presents the scheme of bus and line transfer for improving transient stability and the reactive transient stability index usable in time simulation. And also multi-transferring scheme for improving damping is proposed. These results can be applied in determining the effective position for transfer control.

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A Study on Transient Stability Augmentation by Transfering Line and Bus (송전선 절체제어에 의한 전력계통 안정화 연구)

  • Suh, Eui-Suk;Oh, Tae-Kyoo;Han, Hoo-Sek
    • Proceedings of the KIEE Conference
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    • 1998.11b
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    • pp.681-684
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    • 1998
  • This paper presents the scheme of bus and line transfer for improving transient stability and the relative transient stability index usable in time simulation. And also multi-transferring scheme for improving damping is proposed. These results can be applied in determining the effective position for transfer control.

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A Study on Transient Stability Augmentation by Transfering Line and Bus (송전선 절체제어에 의한 전력계통 안정화 연구)

  • Suh, Eui-Suk;Oh, Tae-Kyoo;Han, Hoo-Sek
    • Proceedings of the KIEE Conference
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    • 1998.11a
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    • pp.361-364
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    • 1998
  • This paper presents the scheme of bus and line transfer for improving transient stability and the relative transient stability index usable in time simulation. And also multi-transferring scheme for improving damping is proposed. These results can be app1ied in determining the effective position for transfer control.

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Power System Stability Analysis Using a Hybrid Approach (하이브리드 방법을 이용한 전력계통 안정도 해석)

  • Seo, Gyu-Seok;Park, Ji-Ho
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.24 no.10
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    • pp.21-25
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    • 2010
  • This paper explains hybrid method that combines Time domain simulation technique with the direct method of Transient stability analysis. First, it calculate trajectory of real system by Time domain Simulation using OOP(Object Oriented Programming method) and evaluate Transient Energy Function to induce stability index to calculate Transient stability margin. Once the status of system(stable or unstable) has been identified, proper criteria are proposed to stop time-domain simulation to reduce CPU time.

Preventive Control for Transient Security with Generation Rescheduling Based on Rotor Trajectory Index

  • Verma, Kusum;Niazi, K.R.
    • Journal of Electrical Engineering and Technology
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    • v.10 no.2
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    • pp.465-473
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    • 2015
  • The increasing need to improve transient security assessment of existing or forecasted operating conditions of networks by power system operators is major concern of the power system security monitoring problem at the Energy Management Systems. This paper proposes a preventive control of transient stability with generation rescheduling based on rotor trajectory index obtained using time domain simulations. This index may help power engineers in making operational decision and to obtain a generation configuration with better transient security dispatch. The effectiveness of the proposed methodology is demonstrated on IEEE 39-bus New England system for a three phase fault at different loading conditions with single and multiple line outage cases.

Transient Stability Analysis Using Fractal Behaviours (프랙탑 현상을 이용한 과도 안정도 해석)

  • Choi, Jong-Yun;Ahn, Hyun-Sik;Kim, Jin-O
    • Proceedings of the KIEE Conference
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    • 1997.07c
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    • pp.1103-1105
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    • 1997
  • Transient stability analysis is concerned with a power system's response to unwanted disturbance. Recently, direct method which utilize the stable region of stable equilibrium point is used to analyze transient stability This paper focuses on the controlling UEP method using the fractal behaviours. In the controlling UEP method, many algorithms are used to find controlling UEP However, the existence of fractal region gives difficulty in finding the controlling UEP. So, this paper observes the fractal feature arid introduce the fractal index to explain how much the fractal region occupies in the entire space. Using an improved algorithm from the view point of fractal index, we are going to find the controlling UEP.

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A New Algorithm for Unstable Mode Decision in the On-line Transient Stability Assessment (온라인 과도안정도 평가를 위한 새로운 불안정모드 선정 알고리즘)

  • Chang, Dong-Hwan;Kim, Jung-Woo;Chun, Yeong-Han
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.57 no.7
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    • pp.1123-1128
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    • 2008
  • The necessity of online dynamic security assessment is getting apparent under Electricity Market environments, as operation of power system is exposed to more various operating conditions. For on-line dynamic security assessment, fast transient stability analysis tool is required for contingency selection. The TEF(Transient Energy Function) method is a good candidate for this purpose. The clustering of critical generators is crucial for the precise and fast calculation of energy margin. In this paper, we propose a new method for fast decision of mode of instability by using stability indices and energy margin. The method is a new version of our previous paper.[1] Case studies are showing very promising results.