Stabilizing control, system preventing loss of synchronism from extension and its actual operating experience

Matsuzawa, K.; Yanagihashi, Ken; Tsukita, J.; Sato, Mitsumasa; Nakamura, Tomohiko; Takeuchi, Akihiro

doi:10.1109/59.466481

Cited by 32 publications

(5 citation statements)

References 3 publications

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“…Some papers proposed the hydraulic system modeling method and further investigation of the interactions between power system oscillation and the dynamic characteristics of the hydraulic mechanical system (De Jaeger et al, 1994), (Machowski et al, 1999). A study conducted in Demello et al (1992) proposed a scheme for improving transitional stability of the system by using a method of coordination between fast valving and generator excitation setting (Matsuzawa et al, 1995). Research in proposed a fast valving method by using a parallel valve system to improve system stability.…”

Section: Stability Improvementmentioning

confidence: 99%

Improved of Frequency Stability Response using the High Speed Valve Control (HSVC) of the Micro Hydro Power Plant

Nojeng¹,

Sugianto²,

Murniati³

et al. 2019

Int. J. Electr. Power Eng.

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Micro-Hydro Power Plant (MHPP) is one of popular renewable based power plants that appropriate to be installed in developing countries such as Indonesia due to its stability, efficient operation and economic point of view. Frequency stability of power plant systems refers to the ability of generator to maintain the steady frequency during and post faults and rapid dynamic load. In order to keep the stability of power system frequency from fluctuations, generating units change their power output automatically according to the change of the system frequency or load through balancing of the active power with the loads. To keep the stability frequency on MHPP, active power fast control is employed in this study and all the system of MHPP and the frequency control are carried out and simulated extensively using MATLAB/Simulink. With the active power control through fast valving mechanism using HSVC method, duration of stability frequency response is faster compared to the system without fast control.

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Section: Stability Improvementmentioning

confidence: 99%

Improved of Frequency Stability Response using the High Speed Valve Control (HSVC) of the Micro Hydro Power Plant

Nojeng¹,

Sugianto²,

Murniati³

et al. 2019

Int. J. Electr. Power Eng.

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“…As a result, the predicted relative rotor angles of other generators with respect to the reference generator can be obtained by subtracting the absolute rotor angle of reference generator from other absolute rotor angles. If the change of predicted relative rotor angle is greater than 180 , the system is expected to be unstable in the future.The polynomial function expansion method uses the first several terms in the Taylor series expansion to predict absolute rotor angles at future times [3]. The problem of this method arises when the number of known values is much greater than the required one for prediction.…”

Section: A Rotor Angle Predictions After Fault Clearingmentioning

confidence: 99%

“…The stabilizing control system implemented in Tokyo Electric Power Company (TEPCO) predicts generator angle changes to foresee the loss of synchronism. When instability is predicted, the minimum number of generators to trip is decided by estimating the generator angle for various tripping amounts [3]. The common point of the two systems proposed before is that the systems are designed for a single power station and the tripping decision is made from the local point of view.…”

Section: Introductionmentioning

confidence: 99%

A hybrid method for generator tripping

Karady

2002

IEEE Trans. Power Syst.

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Generator tripping is one of the most effective approaches to enhance the transient stability of a power system. In this paper, an online prediction method of transient stability and an offline analysis method of generator tripping are studied respectively. First, a polynomial curve fitting technique is employed to improve the online prediction accuracy of system stability. Then, a shell program is developed to automatically generate and update look-up tables for generator tripping. Based on these, a hybrid method is proposed. It uses the look-up tables to determine generator tripping requirements and before sending out generator tripping signals, instability is confirmed by online prediction of system stability. Simulation results show that this hybrid method can avoid unnecessary generation shedding.

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“…It was found in [4] that loss of synchronism depends on relative rotor angles of generators. The prediction of relative rotor angles helps in determining the number of generators to be out of synchronism and accordingly needed control to regain system stability [4].…”

Section: Prediction Agentmentioning

confidence: 98%

On-line transient stability enhancement using multi-agent technique

Karady

Daoud

Mohamed

2002 IEEE Power Engineering Society Winter Meeting. Conference Proceedings (Cat. No.02CH37309)

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This paper proposes a multi-agent technique that is divided into two parts. The first part is a prediction agent that will predict power system instability. According to the prediction agent's output, control agent is initiated. The prediction agent is adapted from a proven robotic ball-catching algorithm. The control agent initiates turbine fast valving. The resulting multi-agent technique can predict system instability and establish system stability. Decoded MATLAB programs of both agents are linked to ETMSP program, power system simulation program, used in verifying the results. Results show that the proposed technique could be used on-line for power system instability prediction and control if the control agent speed can be increased.

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Stabilizing control, system preventing loss of synchronism from extension and its actual operating experience

Cited by 32 publications

References 3 publications

Improved of Frequency Stability Response using the High Speed Valve Control (HSVC) of the Micro Hydro Power Plant

Improved of Frequency Stability Response using the High Speed Valve Control (HSVC) of the Micro Hydro Power Plant

A hybrid method for generator tripping

On-line transient stability enhancement using multi-agent technique

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