Adaptive load shedding based on combined frequency and voltage stability assessment using synchrophasor measurements

Tang, Junjie; Liu, Junqi; Ponci, Ferdinanda; Monti, Antonello

doi:10.1109/tpwrs.2013.2241794

Cited by 191 publications

(115 citation statements)

References 30 publications

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“…From pre-fault load flow results, it was found that tripped generator G9 was generating 654.03 MW and thus load shedding proportional to this power is distributed among the critical load buses as per Eq. (16). Table 5 shows the pre-fault and post-fault load demand at the critical buses.…”

Section: Simulation Resultsmentioning

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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Section: Simulation Resultsmentioning

confidence: 99%

“…For such conditions, the emergency control measures are introduced to bring the system back to normal operating state. Various emergency control measures are proposed [15][16][17] for improving the stability of power systems. Majority of these measures includes load shedding and generation shedding.…”

Section: Introductionmentioning

confidence: 99%

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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show abstract

“…Furthermore, some authors have attempted to reflect the impact of UFLS on the system as a whole, e.g. the changes in voltage, reactive flows [52] and line loading [53].…”

Section: Intelligent Under Frequency Load Sheddingmentioning

confidence: 99%

Improving the performance of power system protection using wide area monitoring systems

Phadke

Wall

Ding

et al. 2016

J. Mod. Power Syst. Clean Energy

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Wide area monitoring (WAM) offers many opportunities to improve the performance of power system protection. This paper presents some of these opportunities and the motivation for their development. This methods include monitoring the suitability of relay characteristics, supervisory control of backup protection, more adaptive and intelligent system protection and the creation of novel system integrity protection scheme. The speed of response required for primary protection means that the role WAM in enhancing protection is limited to backup and system protection. The opportunities offered by WAM for enhancing protection are attractive because of the emerging challenges faced by the modern power system protection. The increasingly variable operating conditions of power systems are making it ever more difficult to select relay characteristics that will be a suitable compromise for all loading conditions and contingencies. The maloperation of relays has contributed to the inception and evolution of 70 % of blackouts, thus the supervision of the backup protection may prove a valuable tool for preventing or limiting the scale of blackouts. The increasing interconnection and complexity of modern power systems has made them more vulnerable to wide area disturbances and this has contributed to several recent blackouts. The proper management of these wide area disturbances is beyond the scope of most of the existing protection and new, adaptive system integrity protection schemes are needed to protect power system security.

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“…A frequency value is set for UFLS under which load shedding should be activated [40,41]. Compared with UFLS, the control scheme proposed in this paper is a "soft" one with much less cost and it will respond to the abnormal frequency earlier than the activation of UFLS.…”

Section: Decentralized Control Design For Frequency Regulationmentioning

confidence: 99%

Active Participation of Air Conditioners in Power System Frequency Control Considering Users’ Thermal Comfort

et al. 2015

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Air conditioners have great potential to participate in power system frequency control. This paper proposes a control strategy to facilitate the active participation of air conditioners. For each air conditioner, a decentralized control law is designed to adjust its temperature set point in response to the system frequency deviation. The decentralized control law accounts for the user's thermal comfort that is evaluated by a fuzzy algorithm. The aggregation of air conditioners' response is conducted by using the Monte Carlo simulation method. A structure preserving model is applied to the multi-bus power system, in which air conditioners are aggregated at certain load buses. An inner-outer iteration scheme is adopted to solve power system dynamics. An experiment is conducted on a test air conditioner to examine the performance of the proposed decentralized control law. Simulation results on a test power system verify the effectiveness of the proposed strategy for air conditioners participating in frequency control.

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Adaptive load shedding based on combined frequency and voltage stability assessment using synchrophasor measurements

Cited by 191 publications

References 30 publications

Preventive and Emergency Control of Power System for Transient Stability Enhancement

Preventive and Emergency Control of Power System for Transient Stability Enhancement

Improving the performance of power system protection using wide area monitoring systems

Active Participation of Air Conditioners in Power System Frequency Control Considering Users’ Thermal Comfort

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