Case Study: An Adaptive Underfrequency Load-Shedding System

Manson, Scott; Zweigle, Greg; Yedidi, Vinod

doi:10.1109/tia.2013.2288432

Cited by 27 publications

(17 citation statements)

References 3 publications

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“…Hence, for minimum frequency deviations factors [8,32,34] are discussed in Figure 1. The values of the minimum frequency and the new steady-state frequency reached during the transient process are proportional to the power imbalance and depend on the dynamic properties of turbines, governors, loads, and other control devices [10].…”

Section: System Frequency Responsementioning

confidence: 99%

“…UFLS very often disconnects more or less load than is required. This causes undesired damages and serious costs [10]. No traditional schemes take into account load-level changes, system inertia changes, changes in load composition, governor response characteristics, or changes in system topology [11].…”

Section: The Adaptive Scheme For Load Sheddingmentioning

confidence: 99%

“…Basically, a load shedding scheme acts whenever it diagnoses a situation of danger for the system. A historical method for detecting power unbalances is to detect a fall or rise in the frequency of the power system [2,10]. The threshold value of underfrequency (UF) or overfrequency (OF) is used as a triggering for shedding of loads or generators so that the power system stability can be maintained [7,11].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Load Sheddingtechniques For System With Cogeneration: A Review

Lakra¹,

Kirar²

2015

ELELIJ

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In developing countries a large demand of power will be seen in future. It is essential to maintain power continuity and reliability. Contingencies like fault occurrence and generated power and load demand imbalance causes system frequency instability. Load-shedding is the ultimate solution to restore system frequency and ensure availability of electrical power to critical loads in the plant. This paper presents a review of traditional adaptive and computational intelligent load shedding scheme. A comparison of these entire schemes with corresponding advantages and disadvantages is summarized.

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Section: System Frequency Responsementioning

confidence: 99%

Section: The Adaptive Scheme For Load Sheddingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Load Sheddingtechniques For System With Cogeneration: A Review

Lakra¹,

Kirar²

2015

ELELIJ

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“…These advanced implementations, although might not be present in the existing relays, are deemed to be realized in smart transmission grid objectives. Similar assumption on applying the relays settings form the control center has been applied in some of the recent studies achieved in the literature . Detailed comparative studies, conducted on a real‐world test system, are considered to validate efficiency of the proposed approach.…”

Section: Introductionmentioning

confidence: 98%

Toward a wide-area load shedding scheme: Adaptive determination of frequency threshold and shed load values

Mehrabi

Afsharnia

Golshannavaz

2017

Int Trans Electr Energ Syst

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Summary Conventional under frequency and under voltage load shedding (UFLS and UVLS) schemes are generally independent than each other. Besides, in these schemes, the operating thresholds, amounts, and location of shed loads are settled in constant values for different disturbances. Due to these technical flaws, the conventional load shedding schemes fail to retrieve power system stability which outlines the necessity of devising improved adaptive mechanisms. To this end, the ongoing study proposes an adaptive UFLS scheme based on wide area measurement systems (WAMS). In contradiction to the existing methods, the proposed approach is featured with an adaptive manner. In other words, the frequency threshold of load shedding relays is adaptively tuned at each disturbance. Furthermore, a wide‐area index is proposed to select the amount of required shed loads. Extensive numerical studies conducted on a real‐world case study are involved to evaluate performance of the proposed approach.

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“…al. [12] have provided a case study of UFLS scheme considering communication challenges as well. Reddy et.…”

mentioning

confidence: 99%

Improved Load-Shedding Scheme Considering Distributed Generation

Das

Nitsas

Altin

et al. 2017

IEEE Trans. Power Delivery

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Abstract-With high penetration of distributed generation (DG), the conventional under-frequency load shedding (UFLS) face many challenges and may not perform as expected. This article proposes new UFLS schemes, which are designed to overcome the shortcomings of traditional load shedding scheme. These schemes utilize directional relays, power flow through feeders, wind and PV measurements to optimally select the feeders to be disconnected during load shedding such that DG disconnection is minimized while disconnecting required amount of consumption. These different UFLS schemes are compared in terms of frequency response, amount of consumption and DG disconnected during load shedding.

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Case Study: An Adaptive Underfrequency Load-Shedding System

Cited by 27 publications

References 3 publications

Load Sheddingtechniques For System With Cogeneration: A Review

Load Sheddingtechniques For System With Cogeneration: A Review

Toward a wide-area load shedding scheme: Adaptive determination of frequency threshold and shed load values

Improved Load-Shedding Scheme Considering Distributed Generation

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