Risk-Based Coordination of Generation Rescheduling and Load Shedding for Transient Stability Enhancement

Wang, Zhen; Song, Xiaozhe; Xin, Huanhai; Gan, Deqiang; Wong, Kit Po

doi:10.1109/tpwrs.2013.2262719

Cited by 46 publications

(22 citation statements)

References 22 publications

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“…Indeed, the proposed method can be further improved by comparatively resembles with the situation utterly taking place in a deregulated power system which allows utility to adjust or shift the existing energy market so that remedial action could be taken by the generating companies to ensure the system stability is attained. Hence, optimization of energy market is introduced in the second technique of generators rescheduling by considering cost minimization of as the objective function given in (30) [10], [30], [31]. The linear bidding strategy is used to design the expression in (30).…”

Section: Rescheduling Of Critical Generators For a New Atc Determimentioning

confidence: 99%

“…Hence, optimization of energy market is introduced in the second technique of generators rescheduling by considering cost minimization of as the objective function given in (30) [10], [30], [31]. The linear bidding strategy is used to design the expression in (30). Usually, the generating companies are given opportunity to participate in the energy bidding required for an effective implementation of generator rescheduling by increasing and decreasing the generating capacity until the system is in a stable condition.…”

Section: Rescheduling Of Critical Generators For a New Atc Determimentioning

confidence: 99%

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A Novel Approach of Rescheduling the Critical Generators for a New Available Transfer Capability Determination

Othman

Busan²

2016

IEEE Trans. Power Syst.

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The transition to a deregulated electric power system industry has created a highly competitive electricity market with immense power transfer activity performed between the market participants. A poorly-damped oscillation of small-signal instability is usually imminent during a stress power system condition attributed by the base case power transfer or available transfer capability (ATC) compounded with an outage of critical line. The contingency ranking by means of lowest damping ratio is introduced so that execution of the most critical line outage will incite to a poorly-damped oscillation during the base case ATC. The rescheduling of few critical generators determined by using the normalized participation factor is presented in this paper as a novel, non-intricate and cost-effective solution for estimating a new value of ATC while ensuring a secure power system operating condition. Sturdiness of the proposed method is verified through comparison with the weighted-average sensitivity of stability index required for rescheduling the critical generators performed in a case study of 39-bus New England system. Comparative study on the results of cost minimization in generators rescheduling has also been done based on the critical generators selected by the two methods.Index Terms-Available transfer capability, contingency ranking by means of lowest damping ratio, critical generators rescheduling, normalized participation factor, small-signal instability.

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Section: Rescheduling Of Critical Generators For a New Atc Determimentioning

confidence: 99%

Section: Rescheduling Of Critical Generators For a New Atc Determimentioning

confidence: 99%

A Novel Approach of Rescheduling the Critical Generators for a New Available Transfer Capability Determination

Othman

Busan²

2016

IEEE Trans. Power Syst.

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“…The same amount of power is increased for the slow machines. For this study, since relative rotor angles are considered rather than absolute angles therefore the threshold for transient stability is taken as 120 0 [13], mathematically it can be written as …”

Section: Proposed Preventive Control Strategymentioning

confidence: 99%

“…Transient stability enhancement through generation rescheduling can be found in [7][8][9][10][11][12][13][14]. In [7], a hybrid approach is proposed for on-line security evaluation and generator rescheduling as preventive control.…”

Section: Introductionmentioning

confidence: 99%

“…Stability and critical line flows constrained generation rescheduling is proposed in [12] with given initial operating conditions and for assigned contingencies. In [13], risk based coordinated generation rescheduling and load shedding has been suggested for improving the transient stability of the system. Pattern discovery based preventive control is suggested in [14] to improve the dynamic security of the system.…”

Section: Introductionmentioning

confidence: 99%

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Preventive and Emergency Control of Power System for Transient Stability Enhancement

Siddiqui¹,

Verma²,

Niazi³

et al. 2015

Journal of Electrical Engineering and Technology

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-This paper presents preventive and emergency control measures for on line transient stability (security) enhancement. For insecure operating state, generation rescheduling based on a real power generation shift factor (RPGSF) is proposed as a preventive control measure to bring the system back to secure operating state. For emergency operating state, two emergency control strategies namely generator shedding and load shedding have been developed. The proposed emergency control strategies are based on voltage magnitudes and rotor trajectories data available through Phasor Measurement Units (PMUs) installed in the systems. The effectiveness of the proposed approach has been investigated on IEEE-39 bus test system under different contingency and fault conditions and application results are presented.

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A first swing stability improvement approach in microgrids with synchronous distributed generators

Fayazi

Moazzami

Fani

et al. 2021

Int Trans Electr Energ Syst

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Summary One of the effective approaches to maintain power generation consumption balance during contingencies and therefore transient stability of the system is instantaneous rise of generation power and changing the generators excitation control system. This article proposes an auxiliary droop controller, which can replace generator main controller in order to maintain the transient stability of the system at the time of fault occurrence. Because of its linear structure, the proposed droop controller has a high response speed, so it can well supply the additional power demand given the rapid changes of the electric power demand at the time of fault occurrence. The proposed controller replaces the main controller of the generator that has the most impact on the maintaining system transient stability. Therefore, in the proposed method, first, the most efficient generator of the grid is identified using trajectory sensitivity analysis. Then, to maintain balance between power generation and consumption at the worst time of fault occurrence, the smallest amount of auxiliary controller slope is calculated through trajectory sensitivity analysis. Therefore, under any contingencies occurrence in the system, replacing the main controller with an appropriate auxiliary one will guarantee the transient stability of the system. The affectivity of the proposed method is shown using simulations on the IEEE 33‐bus test system. The simulation results show that the proposed auxiliary control method can lead to the at least 20% increase of critical clearing time (CCT) compared to the conventional droop control method. Furthermore, it is robust against the changes of inertia, up to 5%, as one of the main parameters in the first swing stability of the system.

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Risk-Based Coordination of Generation Rescheduling and Load Shedding for Transient Stability Enhancement

Cited by 46 publications

References 22 publications

A Novel Approach of Rescheduling the Critical Generators for a New Available Transfer Capability Determination

A Novel Approach of Rescheduling the Critical Generators for a New Available Transfer Capability Determination

Preventive and Emergency Control of Power System for Transient Stability Enhancement

A first swing stability improvement approach in microgrids with synchronous distributed generators

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