Development of transient stability control system (TSC system) based on on-line stability calculation

Ota, H.; Kitayama, Yoshifumi; Ito, Hisanori; Fukushima, Noburu; Omata, Kazuya; Morita, Kenichi; Kokai, Yutaka

doi:10.1109/59.535687

Cited by 87 publications

(40 citation statements)

References 5 publications

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“…It is supposed that the system returns to a stable state by generator shedding. If the value of the slope at control time is obtained, the corresponding generator shedding can be calculated by Equation (2). To obtain the value of the slope at control time, the characteristic of the slope is analyzed below.…”

Section: The Slope Of the State-plane Trajectorymentioning

confidence: 99%

“…Therefore, the value of the slope at control time can be calculated by Equation (14), and the corresponding control quantity can be calculated by Equation (2). There are two unknowns δ b and kpδ, ωq in Equation (14).…”

Section: Calculation Of Control Quantity For Smibmentioning

confidence: 99%

“…For unstable situations, the control quantity of different situations is obtained by repeated simulations to develop a cure table. When disturbances occur, protection devices operate on the basis of the cure table [1,2].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Response Based Emergency Control System for Power System Transient Stability

2015

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A transient stability control system for the electric power system composed of a prediction method and a control method is proposed based on trajectory information. This system, which is independent of system parameters and models, can detect the transient stability of the electric power system quickly and provide the control law when the system is unstable. Firstly, system instability is detected by the characteristic concave or convex shape of the trajectory. Secondly, the control method is proposed based on the analysis of the slope of the state plane trajectory when the power system is unstable. Two control objectives are provided according to the methods of acquiring the far end point: one is the minimal cost to restore the system to a stable state; the other one is the minimal cost to limit the maximum swing angle. The simulation indicates that the mentioned transient stability control system is efficient.

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Section: The Slope Of the State-plane Trajectorymentioning

confidence: 99%

Section: Calculation Of Control Quantity For Smibmentioning

confidence: 99%

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Response Based Emergency Control System for Power System Transient Stability

2015

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“…Now, let us pay attention to the existing algorithms for obtaining emergency control strategies including heuristic methods [12,15] and sensitivity-like index ones [14,16,17] . The first group of methods incorporate experts' experiences into computing, which could save CPU time.…”

Section: Introductionmentioning

confidence: 99%

Transient stability and emergency control

Zhang

Mei

2008

Sci. China Ser. E-Technol. Sci.

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Comparability of emergency control strategies with different instability modes is the key issue to decide which control strategy to be implemented. This paper considers that the essential factor causing instability should be used to form a unified standard to assess the effectiveness of control strategies with different instability modes. Thus a switching control stabilization principle was proposed based on elimination of the unbalanced energy between mechanical and electrical energies of generator sets. Along this way, the difficulty of seeking a Lyapunov function was circumvented. According to the principle, an emergency control algorithm framework was established to handle transient stability assessment, control location selection and control amount evaluation. Within the framework, this paper studied instability mode transition, then proposed an algorithm based on prediction function and a new approach to normalized stability margin stemmed from static EEAC method, which can increase comparability of various control locations. The simulations on the New-England System verified the proposed emergency control method for stabilizing transient stability.emergency control, switching system, unbalanced energy

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“…If routing delays are included and if a large number of signals are to be routed, then there is the potential to experience long delays and considerable variability (or uncertainty) in these delays. According to some reports (see, e.g., [8,10]), communication delays of 150 to 200 ms should be considered when designing some transient stability control systems. In this work, simulations are conducted with communication delays ranging from 20 μsec to 500 msec.…”

Section: Delay Rangementioning

confidence: 99%

Effects of Time Delays in the Electric Power Grid

Ali

Dasgupta

2012

Critical Infrastructure Protection VI

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Communication delays in an electric power grid affect the performance of control systems and can cause power losses. This paper analyzes the causes and effects of communication delays. The analysis employs a simulated power network comprising several generators for which braking resistors with intelligent (fuzzy logic) controllers are used for transient stability control. A balanced 3LG (three-phase-to-ground) fault at different points on the transmission lines is considered. Simulation results show that, although a fuzzy-logic-controlled braking resistor can improve transient stability, the communication delay associated with the online calculation of the total kinetic energy deviation, which is the input parameter for fuzzy control, has an influence on the transient stability performance. The paper also examines the delay that a system can tolerate and the cyber attacks that can cause additional delays.

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Development of transient stability control system (TSC system) based on on-line stability calculation

Cited by 87 publications

References 5 publications

Response Based Emergency Control System for Power System Transient Stability

Response Based Emergency Control System for Power System Transient Stability

Transient stability and emergency control

Effects of Time Delays in the Electric Power Grid

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